JPH04165240A - Cooler system - Google Patents

Abstract

PURPOSE:To provide a wide usage of a cooler without a need of a large scale of equipment by a method wherein during operation of a heat pump, moisture separated from desiccant is discharged outside by supplying air into a desiccator cabinet and during stoppage of the heat pump, the inside air is circulated to dehumidify the inside air. CONSTITUTION:In a heat pump, the sensible heat in a room S removed by refrigerant at an evaporator 3 is discharged as waste heat at a condenser 1, causing the room S to be cooled. The waste heat discharged from the condenser l heats desiccant 12 and the contained moisture is separated. On the other hand, the outside air passes through a desiccator cabinet, 11 and the separated moisture is carried by the flow of the outside air. When the operation of the heat pump is stopped, inside air circulation takes place. The air inside the room S passes through the desiccant cabinet 11. While the inside air passes through the desiccant 12, the moisture is absorbed by the desiccant 12 and dehumidification is carried out. At this time, the inside air is heated to a high temperature by the heat of water-absorption. The inside air having a high temperature reaches a heat exchanger 26 via a three-way damper 25. Heat- exchange between the outside air and the inside air takes place at the heat exchanger 26 and the inside air is cooled to about the temperature of the outside air.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a cooling system.

[Conventional technology and problems]

In recent years, with the increase in the use of coolers, the amount of electricity consumed during the daytime in summer has increased significantly, and problems such as insufficient power generation capacity and wasted resources have been pointed out once again.

For this reason, heat pump cooling systems used to cool buildings, etc. are equipped with a cold storage tank to store cold energy using electricity late at night, and use the cold energy stored during the night to cool the air conditioner during the day. It is also being done. However, since this system requires large-sized equipment and is expensive, it lacks versatility and is not widely used in general households.

[Problem to be solved by the invention]

In view of the above circumstances, it is an object of the present invention to provide a versatile, energy-saving cooling system that does not require large-scale equipment.

[Means to solve the problem]

In order to solve the above problems, the cooling system according to the present invention includes a heat pump in which a heat absorbing part is arranged inside the cooling space and a heat radiating part is arranged outside the cooling space. The waste heat emitted from the heat radiating part of the heat pump is supplied to the moisture absorbent, and the gas in the cooling space is passed through the dehumidification tank and then passed through a heat exchange part with outside air. The heat pump is equipped with an inside air circulation means that returns the air to the cooling space again, and an outside air ventilation means that takes in outside air from outside the dehumidification tank, passes through the inside of the dehumidification tank, and then discharges it outside the dehumidification tank. The separated moisture is discharged outside the dehumidifying tank by ventilation into the dehumidifying tank, and when the heat pump is stopped, the inside air is circulated to dehumidify the inside air.

[For production]

In the cooling system according to the present invention, as will be seen in detail later, the sensible heat load is covered by the actual operation of the heat pump, and the latent heat load is covered by the waste heat generated by the actual operation of the heat pump. In this way, the waste heat of the heat pump is used to cover the latent heat load, which is said to account for 1/3 or more of the cooling load, so it is possible to sufficiently reduce energy consumption.

The system requires only a dehumidifying tank filled with a moisture absorbent, so the equipment does not become large and is suitable for general household use, providing sufficient versatility.

〔Example〕

Next, embodiments of the invention will be described in detail with reference to the drawings. Of course, the present invention is not limited to the following embodiments.

FIG. 1 shows how the air conditioning system according to the embodiment performs cooling.

First, the configuration of the cooling system according to the embodiment will be described.The system according to the embodiment includes a heat pump for generating sensible heat.

The heat pump consists of a condenser (heat dissipation part) 1, a compressor 2
, an evaporator (heat absorption part) 3 and an expansion valve 4.

The evaporator 3 of the heat pump is placed indoors (inside the cooling space) S, and the condenser 1 is placed outdoors (outside the cooling space) P.

In addition to the heat pump, this system includes a dehumidification tank 11 for covering the latent heat load. The dehumidification tank 11 contains (fills) a moisture absorbent (for example, silica gel) 12 so that air can pass therethrough, and is arranged outdoors P. A moisture absorbent (moisture adsorbent) 12 in this dehumidification tank 11 is supplied with waste heat emitted from the heat pump condenser 1 . In other words, the moisture absorbent 12
There is a condenser 1 nearby (for example, the condenser 1 is installed in the dehumidifying tank 11, or the condenser 1 is installed in contact with the dehumidifying tank 11), and the waste heat released from the condenser 1 as the heat pump operates. This cooling system, in which the moisture absorbent 12 is heated, is provided with an inside air circulation means and an outside air ventilation means. Both means include channels 20 and 21 connecting the room S and the dehumidifying tank 11, a three-way damper 22 and a fan 23 provided in the middle of the channel 20.
, a three-way damper 25 provided in the middle of the flow path 21 and a heat radiation section 26 are partially used in common.

When the outside air ventilation means is operated, the fan 23 rotates, and the three-way damper 22 enters a switching state in which the outside air intake port 22a is opened and the inside air intake port 22b is closed, and the outside air outlet 25a of the three-way damper 25 is opened and the outside air inlet 22b is closed. The discharge port 25b is in a closed switching state, and outside air passes through the path: outdoor P, three-way damper 22, fan 23, dehumidification tank 11, three-way damper 25, and outdoor P-. In other words, the outside air ventilation means
The main components are a fan 23, an outside air intake port 22a, and an outside air outlet 25a.

When the inside air circulation means is operated, the fan 23 rotates and the three-way damper 22 enters a switching state in which the outside air intake port 22a is closed and the inside air intake port 22b is open, and the three-way damper 25 is in a switching state where the outside air outlet 25a is closed and the outside air inlet 22b is opened. The discharge port 25b is in the open switching state, and the indoor S-three-way damper 22-fan 23-dehumidifying tank 11-three-way damper 25-heat exchange section 26
-Inside air circulates through a path called indoor S. That is, the inside air circulation means has the fan 23, the inside air inlet 22b, the inside air outlet 25b, and the heat exchanger 26 as main components.

The outside air ventilation described above is performed in synchronization with the actual operation of the heat pump that covers the sensible heat load, and the inside air circulation is performed in synchronization with the operation of the dehumidification tank that covers the latent heat load. three-way damper,
Needless to say, a series of related operations such as fans and heat pumps are controlled by an electric control unit (not shown) in the same way as in a normal cooling system.

Next, the operation of the cooling system of the embodiment will be explained.

First, we will discuss the case where the heat pump actually operates to cover the sensible heat load (cooling operation).

The heat pump is operated and the above-mentioned outside air ventilation is performed. In the heat pump, sensible heat in the room S obtained by the refrigerant in the evaporator 3 is discharged as waste heat in the condenser 1, and the room S is cooled. The waste heat generated by the condenser 1 heats the moisture absorbent 12 to remove the moisture contained therein. On the other hand, outside air passes through the inside of the dehumidifying tank 11, and the separated moisture is discharged to the outside P along with the flow of outside air. Therefore, the moisture absorbent 12 is dried and regenerated.

Next, we will discuss the case where the latent heat load is covered by the waste heat of the heat pump (dehumidification operation).

The operation of the heat pump is stopped and the above-mentioned internal air circulation is performed. Air in the room S (inside air) passes through the dehumidification tank 11. When the inside air passes through the moisture absorbent 12, moisture adsorption occurs and the humidity is removed from the inside air. At this time, the inside air is warmed by the heat of moisture adsorption and its temperature increases. The high-temperature internal air passes through the three-way damper 25 and reaches the heat exchange section 26. The heat exchange section 26 has a large number of cooling fins 26a, in which heat exchange is performed between outside air and inside air, and the inside air is cooled down to about the outside air temperature. The interior air from which latent heat has been removed in this way is blown out into the room S again.

When this cooling system is installed in a general wooden house,
Effective cooling can be achieved by alternately repeating 20 minutes of cooling operation and 10 minutes of dehumidification operation. The amount of silica gel in the dehumidifying tank 11 is, for example, about 5 kg.

The moisture absorbent is not limited to silica gel, but it is preferable to use one that can effectively utilize the waste heat of the heat pump (for example, silica gel that can remove moisture at about 50 to 100° C.).

It goes without saying that the ratio of cooling operation to dehumidification operation and the amount of moisture absorbent are appropriately set according to the type of building, the insulation structure, the ratio of latent heat load to sensible heat load, etc. [Effects of the Invention] According to this invention The cooling system has a configuration in which the sensible heat load is covered by the actual operation of the heat pump, and the latent heat load is covered by the waste heat generated during the actual operation of the heat pump, reducing energy consumption. Because it is only one device, the equipment does not need to be large-sized and is versatile enough to be used in a general household.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram illustrating the state of cooling by the cooling system according to the embodiment of the present invention. 1... Condenser (heat radiation part) 2... Compressor 3
... Evaporator (heat absorption part) 4... Expansion valve 11.
... Dehumidification tank 12 ... Moisture absorbent 26 ... Heat exchange section S ... Indoors (inside the air conditioner space) P ... Outdoors (outside the air conditioner space) Agent Patent attorney Takehiko Matsumoto

Claims (1)

[Claims] 1 In a cooling system equipped with a heat pump in which the heat absorption part is placed inside the cooling space and the heat radiation part is placed outside the cooling space, a dehumidification tank containing a moisture absorbent is installed outside the cooling space, and the waste generated from the heat radiation part of the heat pump is removed. an inside air circulation means configured to supply heat to the moisture absorbent, and to pass the gas in the cooling space through the dehumidification tank, through a heat exchange section with outside air, and return it back into the cooling space; , outside air ventilation means is provided for taking in outside air from outside the dehumidifying tank, passing through the inside of the dehumidifying tank, and then exhausting it outside the dehumidifying tank again. When the heat pump is in operation, the moisture released from the moisture absorbent is vented into the dehumidifying tank. This cooling system is characterized by dehumidifying the inside air by discharging it outside the dehumidifying tank and circulating the inside air when the heat pump is stopped.