JPH11351731A - Refrigerating device and humidifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the life of a humidification means in a humidifying device and a refrigerating device for easy adjustment of humidification amount and highly accurate humidity control even under conditions of low temperature and high humidity. SOLUTION: A water circulating circuit 2 comprising a tank 6, a pump 4 and a moisture permeable film humidifier 5 connected in order, and a refrigerant circuit 3 are provided. A water supply pipe 11 for supplying water to the tank 6, and a drain pipe 13 for draining the water of the tank 6 are provided. On the water supply pipe 11 is provided a water supply solenoid valve 12, and on the drain pipe 13 is provided a drain solenoid valve 14. By interlocking with defrosting operation of the refrigerant circuit 3, the water supply solenoid valve 12 and the drain solenoid valve 14 are controlled to open and close, and a water supply and drain controller 50 for replacing part of the water in the tank 6 is so provided as to suppress a rise in the concentration of the hard component of the water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system and a humidification system having a water circulation circuit, and more particularly to a measure for circulating water scale.

[0002]

2. Description of the Related Art Conventionally, a refrigerating apparatus has been known which maintains air in a refrigerator at low temperature and high humidity for the purpose of, for example, storing food. Since the evaporator of the refrigerating device has a temperature lower than the dew point of the air in the refrigerator, dew condensation occurs on the surface of the evaporator.
Therefore, since the air in the refrigerator is dehumidified, humidification must be performed to keep the humidity in the refrigerator constant.

[0003] However, under a low temperature condition, the relative humidity greatly changes due to a small amount of humidification because the partial pressure of water vapor of saturated air is low. When the refrigerator is turned on / off, dew condensation water on the evaporator may evaporate and humidification may be performed by means other than the humidifier with an increase in the internal temperature due to the stop of the refrigerator. Therefore, it has been very difficult to stably control the humidity with high accuracy.

As a technique for preventing over-humidification due to re-evaporation of dew condensation water, Japanese Patent Laid-Open Publication No. Hei 1-203689 discloses a humidifier that operates or stops a humidifier in conjunction with the ON / OFF state of a refrigerator. I have. However, since the humidifier of the above publication uses a water spray type humidifier, the humidification amount cannot be finely adjusted according to the dehumidification amount. As other types of humidifiers, a forced evaporation humidifier, an ultrasonic humidifier, and the like are known, but none of them is suitable for humidification control of the refrigeration apparatus.

[0005]

Accordingly, the present inventors have studied a system for humidifying the air in the refrigerator with a moisture permeable humidifier. However, when humidification is performed for a long time in the moisture permeable membrane humidifier, the hard components contained in the water inside the moisture permeable membrane are concentrated and scale is deposited, and this scale reduces the moisture permeability of the moisture permeable membrane. There is a problem of lowering. Therefore, in order to improve the reliability and extend the life of the moisture permeable membrane humidifier, and to maintain the quality of the stored material over a long period of time, increase the concentration of the hard component of the water supplied to the moisture permeable membrane humidifier. Water quality management must be carried out to control.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to easily adjust a humidification amount and to perform humidity control with high accuracy even under low temperature and high humidity conditions. In a humidifying device and a freezing device that can be used, water quality management is performed to extend the life of the humidifying unit.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a humidifying means for supplying water vapor through a porous member which prevents the passage of water and allows only water vapor to pass through.
(5) Or install a permeable membrane humidifier (5) in the water circulation circuit (2),
A part of the water in the water circulation circuit (2) is replaced regularly or constantly to suppress the rise of the hard component of the water in the water circulation circuit (2).

Specifically, the means taken by the first invention are:
A cooler (24) for cooling the air in the refrigerator, and a water flow path (15) that is separated from the air path by a porous member that prevents the passage of water and allows only water vapor to pass therethrough, is provided. Humidifying means (5) for supplying water vapor from the water to the inside of the refrigerator through the porous member, wherein the humidifying means (5) stores the water recovered from the humidifying means (5). A water circulation circuit (2) to which a storage means (6) and a circulation drive means (4) for supplying water from the storage means (6) to the humidification means (5) are connected.
And water supply means (1) for supplying water to the storage means (6).
1a) and drainage means (13a) for discharging water from the storage means (6)
And a water supply / drainage control means (50) for controlling the water supply means (11a) and the drainage means (13a) so as to replace part of the water in the storage means (6). .

According to the above-mentioned invention, the air in the refrigerator is cooled by the cooler (24), and the water in the storage means (6) is driven by the circulation drive means (4) in the water circulation circuit (2) to humidify the water. It is supplied to means (5). Water flow path of humidifying means (5)
Part of the water flowing through (15) is converted into water vapor through the porous member and supplied to the air in the refrigerator, and the inside of the refrigerator is humidified.
With the humidification in the humidification means (5), the amount of water in the water circulation circuit (2) decreases, and the concentration of the hard component of the water increases. But,
The water supply / drainage control means (50) is provided with the water supply means (11a) and the drainage means (13
a) is controlled to replace a part of the water in the storage means (6), so that the concentration of the hard component is prevented from excessively rising, and the water circulation circuit
(2) Water quality is maintained. Therefore, the deposition of scale is suppressed, and the life of the humidifying means (5) is extended.

According to a second aspect of the present invention, in the first aspect, the refrigeration operation and the defrost operation of the cooler (24) are selectively executed freely, and the water supply / drainage control means (50) is provided.
Are water supply means (11a) and drainage means during the refrigeration operation.
While the operation of (13a) is stopped, the water supply means (11a) and the drainage means (13a) are operated to replace a part of the water of the storage means (6) during the above defrost operation. is there.

According to the above-mentioned specific features of the invention, during the freezing operation, the operations of the water supply means (11a) and the drainage means (13a) are stopped, and the water of the storage means (6) is not replaced. on the other hand,
During defrost operation, water supply means (11a) and drainage means
(13a) is operated, and at least a part of the water in the storage means (6) is replaced. As a result, the humidification by the humidification means (5) is stably executed during the freezing operation, and the water exchange operation is executed only during the defrost operation where humidification is unnecessary.

Means taken by the third invention are a water cooler (24) for cooling the air in the refrigerator, and a water flow passage separated from the air passage by a porous member that prevents the passage of water and allows only water vapor to pass therethrough. (15), humidifying means (5) for supplying water vapor from the water in the water flow path (15) to the internal air through the porous member.
The humidifying means (5) includes a storing means (6) for storing water recovered from the humidifying means (5), and water from the storing means (6). A water circulation circuit (2) connected to a circulation drive means (4) for supplying
The storage means (6) includes a water supply means (11a) for supplying water to the storage means (6), a drainage means (13a) for discharging water from the storage means (6), a first predetermined water level and A water level sensor (10) for detecting a second predetermined water level higher than the first predetermined water level; the water supply means (11a) includes a water supply pipe (11) and the water supply pipe (11);
And a water supply valve (12) provided in the storage means (12). The water level of the storage means (6) is reduced and the water level sensor (10) is
It is configured to open when a predetermined water level is detected, while closing when the water level of the storage means (6) rises and the water level sensor (10) detects the second predetermined water level, and the drainage means (13a)
When the water level of the storage means (6) rises and reaches the second predetermined water level, drainage is performed to lower the water level to a predetermined intermediate water level between the first predetermined water level and the second predetermined water level. like,
The opening (43) opens downward at the intermediate water level and the top (42) has an inverted U-shaped pipe (13) positioned at the second predetermined water level.
b).

According to the above-mentioned invention, the air in the refrigerator is cooled by the cooler (24), and the water in the storage means (6) is driven by the circulation drive means (4) in the water circulation circuit (2) to humidify the water. It is supplied to means (5). Water flow path of humidifying means (5)
Part of the water flowing through (15) is converted into water vapor through the porous member and supplied to the air in the refrigerator, and the inside of the refrigerator is humidified.
With the humidification in the humidification means (5), the amount of water in the water circulation circuit (2) decreases, and the concentration of the hard component of the water increases. And
The water level in the storage means (6) drops due to the decrease in the amount of water in the water circulation circuit (2). When the water level of the storage means (6) drops to the first predetermined water level, the water level sensor (10) detects the first predetermined water level,
The water supply valve (12) opens to supply water to the storage means (6).
As the water is replenished, the water level of the storage means (6) rises and eventually reaches the second predetermined water level. The water level of the storage means (6) is second
When the water level reaches the predetermined water level, the water level sensor (10) detects the second predetermined water level, the water supply valve (12) closes, and water supply is stopped. When the water level reaches the second predetermined water level, water flows from the opening (43) of the inverted U-shaped pipe (13b) to the top (42), and the inverted U-shaped pipe (13b) flows.
Water flows through the inside of the pipe (13b). Then, an amount of water corresponding to the difference between the intermediate water level and the second predetermined water level is inverted U-shaped pipe.
It is discharged out of the storage means (6) through (13b). As a result, part of the water in the storage means (6) will be replaced. Therefore, the water quality of the water circulation circuit (2) is maintained, and the deposition of scale is suppressed, so that the life of the humidifying means (5) is extended.

[0014] The means adopted by the fourth invention is a water cooler (24) for cooling the air in the refrigerator, and a water flow passage separated from the air passage by a porous member that prevents the passage of water and allows only water vapor to pass through. (15), humidifying means (5) for supplying water vapor from the water in the water flow path (15) to the internal air through the porous member.
The humidifying means (5) includes a storing means (6) for storing water recovered from the humidifying means (5), and water from the storing means (6). A water circulation circuit (2) connected to a circulation drive means (4) for supplying
A water supply means (11a) for constantly supplying a predetermined amount of water to the storage means (6) so that a part of the water of the storage means (6) is constantly replaced; A drain means (13a) for constantly discharging a predetermined amount of water from the means (6) is provided.

According to the above-mentioned invention, the air in the refrigerator is cooled by the cooler (24), and the water in the storage means (6) is driven by the circulation drive means (4) in the water circulation circuit (2) to humidify the water. It is supplied to means (5). Water flow path of humidifying means (5)
Part of the water flowing through (15) is converted into water vapor through the porous member and supplied to the air in the refrigerator, and the inside of the refrigerator is humidified.
As it is, the amount of water in the water circulation circuit (2) decreases with the humidification in the humidification means (5), and the concentration of the hard component of the water increases.However, the water is supplied from the water supply means (11a) to the storage means (6). Is constantly supplied and the water in the storage means (6) is constantly discharged by the drain means (13a).
Some of the water is constantly replaced. As a result, the water quality of the water circulation circuit (2) is maintained, and the deposition of scale is suppressed, so that the life of the humidifying means (5) is extended.

According to a fifth aspect, in the fourth aspect, the water supply means (11a) or the drainage means (13a) comprises:
Water pipes (11, 13) for constantly flowing water, and the water pipes (11, 1)
And the orifice (44) provided in (3).

According to the above-mentioned invention, the water pipe (11, 13)
The flow rate of the water flowing through the water is adjusted by the orifice (44), so that a predetermined amount of water suitable for the water exchange operation is constantly supplied or discharged.

According to a sixth aspect of the present invention, there is provided a moisture permeable humidifier.
(5), a storage means (6) for storing the water recovered from the moisture permeable membrane humidifier (5), and water from the storage means (6).
(5) a water circulation circuit (2) connected to a circulation drive means (4); a water supply means (11a) for supplying water to the storage means (6); and a water supply circuit (6). Drainage means (1
3a) and a water supply / drainage control means (50) for controlling the water supply means (11a) and the drainage means (13a) so as to replace part of the water in the storage means (6). It is.

According to the above-mentioned invention, the water circulation circuit (2)
In, the water in the storage means (6) is driven by the circulation drive means (4) and supplied to the moisture permeable membrane humidifier (5). Moisture permeable humidifier
With the humidification in (5), the amount of water in the water circulation circuit (2) decreases, and the concentration of hard components in the water increases. However, since the water supply / drainage control means (50) controls the water supply means (11a) and the drainage means (13a) to replace part of the water in the storage means (6), an excessive increase in the concentration of the hard component is prevented, and the water circulation is prevented. The water quality of the circuit (2) is maintained. Therefore, scale deposition is suppressed, and the life of the moisture permeable humidifier (5) is extended.

According to a seventh aspect of the present invention, there is provided a moisture-permeable membrane humidifier.
(5), a storage means (6) for storing the water recovered from the moisture permeable membrane humidifier (5), and water from the storage means (6).
A water circulation circuit (2) connected to a circulation drive means (4) for supplying the water to the storage means (5);
Water supply means (11a) for supplying water to (6), and the storage means (6)
Drainage means (13a) for discharging the water, and a water level sensor (10) for detecting a first predetermined water level and a second predetermined water level higher than the first predetermined water level, and the water supply means (11a) comprises: Water pipe (1
1) and a water supply valve (12) provided in the water supply pipe (11),
The water supply valve (12) opens when the water level of the storage means (6) decreases and the water level sensor (10) detects the first predetermined water level, while the water level of the storage means (6) rises. The water level sensor (10)
Is configured to close when detecting a second predetermined water level,
The drainage means (13a) drains when the water level of the storage means (6) rises and reaches the second predetermined water level, and reduces the water level to the first level.
The opening (43) opens downward at the intermediate water level and the top (42) is positioned at the second predetermined water level so as to lower the water level to a predetermined intermediate water level between the predetermined water level and the second predetermined water level. This is constituted by an inverted U-shaped tube (13b).

According to the above-mentioned invention, the water circulation circuit (2)
When the water level of the storage means (6) drops due to the decrease in the water volume of the water, and the water level drops to the first predetermined water level, the water level sensor (10)
Detects the first predetermined water level and the water supply valve (12) opens. As a result, water is supplied to the storage means (6), the water level of the storage means (6) rises, and eventually reaches the second predetermined water level. When the water level of the storage means (6) reaches the second predetermined water level, a water level sensor (10)
Detects the second predetermined water level, the water supply valve (12) is closed, and the supply of water is stopped. When the water level reaches the second predetermined water level, water flows from the opening (43) of the inverted U-shaped pipe (13b) to the top (42), and water flows through the inverted U-shaped pipe (13b). I do. Then, an amount of water corresponding to the difference between the intermediate water level and the second predetermined water level is discharged out of the storage means (6) through the inverted U-shaped pipe (13b). As a result, part of the water in the storage means (6) will be replaced. Therefore, the water quality of the water circulation circuit (2) is maintained and scale deposition is suppressed, so that the life of the moisture permeable membrane humidifier (5) is extended.

According to an eighth aspect of the present invention, there is provided a moisture permeable humidifier.
(5), storage means (6) for storing the water recovered from the moisture permeable membrane humidifier (5), and circulation for supplying the water from the storage means (6) to the moisture permeable membrane humidifier (5). And a water circulation circuit (2) connected to a driving means (4). The storage means (6) is provided in the storage means (6) so that a part of the water in the storage means (6) is constantly replaced. Water supply means (11a) for constantly supplying a predetermined amount of water to
And a drainage means (13a) for constantly discharging a predetermined amount of water from the storage means (6).

According to the above-mentioned invention specifying matter, the water supply means (11a)
Water is constantly supplied to the storage means (6) from the storage means, and the water in the storage means (6) is constantly discharged by the drainage means (13a), so that part of the water in the storage means (6) is constantly replaced. . Therefore, the water quality of the water circulation circuit (2) is always kept constant, and the life of the moisture permeable membrane humidifier (5) is extended.

According to a ninth aspect of the present invention, in the eighth aspect, the water supply means (11a) or the drainage means (13a) comprises:
Water pipes (11, 13) for constantly flowing water, and the water pipes (11, 1)
And the orifice (44) provided in (3).

According to the above-mentioned invention specifying matter, the water pipe (11, 13)
The flow rate of the water flowing through the orifice (44) is adjusted,
A predetermined amount of water suitable for the water exchanging operation is always supplied or discharged.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>-Configuration of refrigeration apparatus (1)-The refrigeration apparatus according to Embodiment 1 is installed on a prefab (27), and the air inside the prefab (27) (inside the refrigerator) is heated to a predetermined temperature and temperature. Refrigerator (1) used to maintain humidity. As shown in FIG. 1, the present refrigerator (1) includes a water circulation circuit (2) and a refrigerant circuit (3).

The refrigerant circuit (3) is a circuit capable of freely switching the refrigerant circulation direction, and includes a compressor (20), a condenser (21), and an expansion valve.
(23) and an evaporator (24) are connected in order to form a closed circuit, and a four-way valve (30) for switching the circulation direction of the refrigerant is provided on a discharge side pipe and a suction side pipe of the compressor (20). . A start / stop controller (35) for starting / stopping control (ON / OFF control) of the compressor (20) is connected to the compressor (20). An outdoor blower (22) for supplying outdoor air to the condenser (21) is provided for the condenser (21), and an evaporator (2) is provided for the evaporator (24).
An indoor blower (25) for supplying indoor air is installed in 4). The condenser (21) is provided outside the prefab (27) together with the outdoor blower (22), and the evaporator (24) is installed inside the prefab (27) together with the indoor blower (25). The evaporator (24) corresponds to a cooler in the present invention, and the inside of the prefab (27) corresponds to the inside of the refrigerator.

On the other hand, the water circulating circuit (2) comprises a pump (4) as a circulating driving means and a moisture permeable humidifier as a humidifying means.
(5) and a tank (6) as storage means are connected in order.

The tank (6) has a water supply pipe (1) as a water supply means.
1) is provided, and the water supply pipe (11) is connected to a water supply source (not shown). The water supply pipe (11) is provided with a water supply solenoid valve (12). The water supply pipe (11) and the water supply solenoid valve (12)
The water supply means (11a) referred to in the present invention is formed.

At the bottom of the tank (6), a drain valve (14)
The drain pipe (13) provided with is connected. Drain pipe (13)
The drainage electromagnetic valve (14) forms drainage means (13a) referred to in the present invention. In addition, the outlet (1
An outlet pipe (17) for discharging water in the tank (6) is connected to 7a).

The water supply solenoid valve (12) and the drainage pipe of the water supply pipe (11)
The drainage solenoid valve (14) of (13) is connected to a water supply / drainage controller (50) as water supply / drainage control means. The water supply / drain controller (50) is connected to the compressor (20) of the refrigerant circuit (3), and is configured to detect the start and end of the defrost operation of the refrigerant circuit (3). This plumbing controller (50)
As described later, the water supply and drainage control that replaces part of the water in the tank (6) in conjunction with the defrost operation of the refrigerant circuit (3) so that the hard component of water in the water circulation circuit (2) does not become too high Means.

The tank (6) is provided with a float switch (10) as a water level sensor. The float switch (10) is connected to the water supply solenoid valve (12) of the water supply pipe (11). The float switch (10) keeps the water supply solenoid valve (12) closed when the water level in the tank (6) is higher than the predetermined water level, while maintaining the water level in the tank (6) below the predetermined water level. With the water supply solenoid valve (12) open.
(6) Supply water to.

Further, the tank (6) is provided with a water temperature sensor (8) for detecting the temperature of the stored water and a heater (7) for heating the stored water. Water temperature sensor
(8) is connected to a water temperature controller (9) as heating control means, and the detected value of the water temperature sensor (8) is
(9). The heater (7) is a heater whose heating amount can be adjusted freely, and a water temperature controller.
The heating amount is adjusted based on the control signal from (9). These tanks (6), heaters (7)
, A water temperature sensor (8) and a water temperature controller (9) are a water temperature controller for controlling the temperature of water supplied to the permeable membrane humidifier (5).
(TC).

The outflow pipe (17) of the tank (6) is connected to the suction side of the pump (4). The discharge side of the pump (4) is connected to a moisture permeable humidifier (5) via an inlet pipe (18). The pump (4) is connected to a power supply (not shown), and an interlocking controller (26) is provided between the pump (4) and the power supply. The interlocking controller (26) is a compressor of the refrigerant circuit (3)
(20) to supply power to the pump (4) when the compressor (20) is in the ON state, and to cut off power supply to the pump (4) when the compressor (20) is in the OFF state. Is configured. That is, the pump (4) is turned on / off in conjunction with the refrigerant circuit (3).

The moisture-permeable membrane humidifier (5) is formed by a moisture-permeable membrane tube (15) consisting of a plurality of tubular moisture-permeable membranes, and the moisture-permeable membrane tube (15) forms a water flow path. I have. The moisture permeable membrane is a porous member made of a material such as polyethylene, polypropylene, polystyrene, and fluororesin, and having a large number of micropores that allow water vapor to pass freely but not water (liquid). A blower (16) that supplies air to the moisture permeable humidifier (5) is installed in the moisture permeable humidifier (5). Then, the water discharged from the pump (4) flows inside the moisture permeable membrane tube (15), and the air supplied from the blower (16) flows outside the moisture permeable membrane tube (15). After passing through the moisture permeable membrane, the air is released into the air in the air passage and humidified. Blower (16)
Is connected to the interlock controller (26) and the compressor (20) is turned on.
It is controlled to operate in conjunction with the / OFF state. The moisture permeable humidifier (5) is installed above the tank (6), that is, at a position higher than the tank (6).

The outlet pipe (19) of the humidifier (5) is a tank.
(6), the opening end of which is open downward. That is, the outlet pipe (19) is configured to return the water flowing out of the moisture permeable humidifier (5) to the tank (6).

As described above, the water circulation circuit (2)
During the operation of (4), water adjusted to a predetermined temperature in the tank (6) is continuously supplied to the permeable membrane humidifier (5).

-Operation of Refrigerator (1)-Next, the operation of the refrigerator (1) will be described. Main refrigerator
(1) is a humidification refrigeration operation (refrigeration operation in the present invention) for humidification while cooling the inside of the prefab (27), and an evaporator (24).
And a defrost operation for melting the frost of the frost.
Note that the defrost operation is executed for a predetermined time every predetermined time.

-Humidification and refrigeration operation- First, the humidification and refrigeration operation will be described. In the refrigerant circuit (3), ON / OFF control of the compressor (20) is performed by the start / stop controller (35) so as to keep the inside of the prefab (27) at a predetermined temperature. In the water circulation circuit (2), ON / OFF of the compressor (20)
The pump (4) starts and stops according to the state, and water circulates.

In the refrigerant circuit (3), the four-way valve (30) is set on the solid line side shown in FIG. When the compressor (20) is in the ON state, the refrigerant discharged from the compressor (20) is a four-way valve (30)
After passing through, the condensate in the condenser (21), the expansion valve (23)
After evaporating in the evaporator (24) and cooling the air in the prefab (27), it passes through the four-way valve (30) again and the compressor (20)
To perform the circulating operation. At this time, moisture in the air is condensed in the evaporator (24), and dehumidification is performed. If the evaporation temperature of the refrigerant in the evaporator (24) is 0 ° C. or lower, frost is formed on the evaporator (24).

On the other hand, in the water circulation circuit (2), when the pump (4) is in the ON state, the water in the tank (6) is supplied to the moisture permeable humidifier (5) by the pump (4). Humidifier (5)
Distribute. At this time, the steam is prefabricated through the moisture permeable membrane.
(27), and humidified. Moisture permeable humidifier (5)
The water flowing out of the tank flows into the tank (6) through the outlet pipe (19). When the amount of water in the tank (6) decreases, the float switch (10) is turned on, and the water supply solenoid valve (1) of the water supply pipe (11) is turned on.
2) opens and water is supplied to the tank (6). Therefore, the water level in the tank (6) is kept constant.

In the present humidification / freezing operation, not only the temperature control for adjusting the temperature in the prefab (27) but also the following humidification control is performed. Next, humidification control will be described.

In this humidification control, humidity is not detected by using a detection means such as a humidity sensor as in the prior art, and control is not performed based on the detected value. In this control, the dehumidification amount is calculated in advance from the specifications of the device (1), and a constant humidification amount equal to the dehumidification amount is supplied. In other words, the humidifying operation of the moisture permeable membrane humidifier (5) is performed in conjunction with the dehumidifying operation of the evaporator (24) of the refrigerant circuit (3), and at the same time, an amount of water equal to the estimated dehumidifying amount is constantly supplied. Control. In other words, the control is performed such that there is no difference between the timings of the dehumidifying operation and the humidifying operation, and the dehumidifying amount and the humidifying amount are always equal.

In this humidification control, the compressor (2) of the refrigerant circuit (3)
The interlocking controller (26) according to the ON / OFF state of (0)
Starts and stops the pump (4). That is, when the compressor (20) is operating, it is determined that dehumidification is performed in the evaporator (24), and the pump (4) and the blower (16) are operated to operate the moisture permeable membrane humidifier (5). Humidification in. Meanwhile, the compressor (20)
When is stopped, it is determined that dehumidification is not performed, and the operation of the pump (4) and the blower (16) is stopped to stop humidification. Specifically, when the compressor (20) of the refrigerant circuit (3) is in the OFF state, the pump (4) is operated by the interlocking controller (26).
Is stopped, and the water in the water circulation circuit (2) stops circulating. Also, since the moisture permeable humidifier (5) is located above the tank (6), the water in the moisture permeable humidifier (5)
Collected in (6). Further, since the operation of the blower (16) is also stopped, the supply of air to the moisture permeable humidifier (5) is stopped. Therefore, no humidification is performed in the moisture permeable humidifier (5). That is, when dehumidification is not performed, humidification is not performed.

In this humidification control, the humidification amount of the permeable membrane humidifier (5) is controlled by adjusting the temperature of the water supplied to the permeable membrane humidifier (5). The water temperature of the permeable membrane humidifier (5)
According to the flowchart shown in FIG. 2, the setting is performed as follows.

First, in step ST1, the inlet air condition A of the permeable membrane humidifier (5) is set. That is, the temperature and humidity conditions of the air in the prefab (27) are determined.

Next, the process proceeds to step ST2, and the dehumidification amount is calculated in the following order. That is,

[0049]

(Equation 1)

Then,

[0051]

(Equation 2)

Is as follows. Therefore,

[0053]

(Equation 3)

Is as follows. On the other hand, if the bypass factor is BF,

[0055]

(Equation 4)

Is as follows.

Then, as shown in FIG. 3, this result is plotted on the psychrometric chart, and when i ₃ and i ₁ are connected by a straight line, the intersection with i ₂ becomes the outlet air state B. As a result, the inlet air temperature t
_1, when the outlet air temperature t _2, the sensible heat Q _S is

[0058]

(Equation 5)

Is as follows.

The dehumidifying amount Δx is

[0061]

(Equation 6)

Is calculated.

FIG. 4 shows the dehumidification amount calculated based on the above equation [5] using the relative humidity and the temperature of the inlet air condition A as parameters when using the compressor (20) of 1 hp. FIG.
As is clear, the greater the relative humidity of the inlet air, the greater the amount of dehumidification. Also, the higher the temperature of the inlet air, the greater the amount of dehumidification.

Next, the process proceeds to step ST3, where the dehumidification amount Δx is set as a target humidification amount in the moisture permeable membrane humidifier (5).

Then, in step ST4, the target water temperature Tw in the permeable membrane humidifier (5) is calculated from the inlet air condition A and the target humidification amount. Specifically, the relationship between the inlet air condition, the water temperature of the moisture permeable membrane humidifier (5), and the amount of humidification is determined in advance by experiments or the like, and based on the relationship, the humidification amount is determined from the humidification amount. Calculate the water temperature back). For example, FIG.
Is a graph showing the humidification amount with the relative humidity of the inlet air and the difference ΔT between the water temperature of the permeable membrane humidifier (5) and the inlet air temperature as parameters. Here, since the target humidification amount is obtained from the dehumidification amount Δx calculated from the above equation [5], the position in the vertical axis direction is determined. The position in the horizontal axis direction is determined from the relative humidity of the inlet air. As a result, since the position of the coordinates in the graph of FIG. 5 is determined, the difference ΔT between the water temperature of the moisture permeable membrane humidifier (5) and the inlet air temperature is uniquely determined. Therefore, the target water temperature Tw is a value obtained by adding ΔT to the inlet air temperature.
By calculating ΔT, it is uniquely calculated.

Next, the process proceeds to step ST5, where the tank (6)
The water temperature controller (9) adjusts the heating amount of the heater (7) so that the temperature of the water in the inside becomes the target water temperature Tw.
If there is heat loss in the outflow pipe (17) or the inlet pipe (18) while traveling from the tank (6) to the moisture permeable humidifier (5), that is, if there is heat loss, the moisture permeable humidifier (5) Is the target water temperature T
w, the water temperature in the tank (6) is set to the target water temperature T.
Of course, it may be adjusted to be higher than w.

As described above, the water having the predetermined target water temperature Tw flows through the moisture permeable membrane humidifier (5), and the same amount of water as the dehumidification amount is always supplied into the prefab (27). Become.

Further, the present refrigeration apparatus (1) is a moisture permeable humidifier.
(5) Amount of air to be supplied to (processing air volume) and moisture permeable humidifier
(5) There is also a characteristic of the temperature of the water supplied to.

The moisture-permeable membrane humidifier (5) according to the present embodiment performs humidification in a low-temperature prefabricated (27). That is, it is a humidifying unit that performs so-called low-temperature humidification. Since the air to be humidified has low temperature and high humidity, it is difficult to humidify a sufficient amount by flowing low-temperature water through the permeable membrane humidifier (5). Therefore, in the present embodiment, high-temperature water is allowed to flow through the moisture permeable humidifier (5). However, when high-temperature water is passed through the humidifier (5), the surface of the humidifier (5) becomes hot.
The air passing through (5) will be heated as well as humidified. In other words, air receives not only latent heat but also sensible heat. Therefore, the moisture-permeable membrane humidifier (5) is a kind of heating source, and the heating by the moisture-permeable membrane humidifier (5) inevitably becomes a heat load (sensible heat load) of the refrigerator (1). If the heat load is large, it becomes necessary to increase the refrigeration capacity of the refrigerant circuit (3), which makes it difficult to save energy and increases the size of the device. Therefore, in this refrigerator (1), in order to suppress the sensible heat load by the moisture permeable humidifier (5),
The processing air volume is determined as follows.

That is, first, the relationship between the outlet air condition B and the processing air volume V and the relationship between the outlet air condition B and the sensible heat load are calculated in advance, and then the sensible heat load is reduced to a predetermined value. Thus, the outlet air state B and the processing air volume V are calculated by back calculation.

The relationship between the outlet air condition B and the processing air volume V, and the relationship between the outlet air condition B and the sensible heat load are specifically described as follows.
It is calculated according to the flowchart of FIG. That is, in step ST11, the values of the outlet air temperature t2 and the relative humidity φ2 (%) of the outlet air are set as parameters. Next, the process proceeds to step ST12 to calculate another state of the outlet air, for example, the absolute humidity x2. Then, in step ST13, the processing air volume V is calculated. In particular,

[0072]

(Equation 7)

Then,

[0074]

(Equation 8)

Therefore, the processing air volume V is obtained by modifying the equation [7],

[0076]

(Equation 9)

Is calculated.

Next, the process proceeds to step ST14 to calculate a sensible heat load. Specifically, the sensible heat load is calculated by the above equation [10].

As described above, the processing air volume V using the outlet air temperature t2 and the relative humidity φ2 of the outlet air as parameters
And the sensible heat load are calculated. FIG. 7 shows a calculation result regarding the sensible heat load, and FIG. 8 shows a calculation result regarding the processing air volume V.

In the present embodiment, the processing air volume V is determined as follows so that the sensible heat load is 15% or less of the refrigerating capacity based on the calculation result. That is,
First, a value of the sensible heat load that is 15% or less of the refrigerating capacity is calculated, and in FIG. 7, the outlet air state B corresponding to the sensible heat load is specified. Then, in FIG. 8, the processing air volume V is determined from the specified outlet air state B. As a result, for example, the floor area of the prefab (27) is
Sensible heat load is 15% of the refrigeration capacity when the capacity of the refrigeration capacity is 1 hp, the temperature in the prefab (27) is 5 ° C, and the relative humidity is 90%.
Is determined to be a small value of about 0.1 to 0.3 m ³ / min. The outlet air temperature is determined to be a high temperature of about 40 to 50 ° C. The processing air volume V is adjusted by controlling the rotation speed of the blower (16) and a damper (not shown) provided in the ventilation passage.

As described above, in the present refrigeration system (1), the temperature of the water supplied to the moisture permeable membrane humidifier (5) is set to be much higher than in the past, while, on the other hand, the moisture permeable membrane humidifier (5) ) The amount of air passed through is much smaller than before.

After the humidification and freezing operation is continuously performed for a predetermined time, a defrost operation is performed. Next, the defrost operation will be described.

-Defrosting Operation- In the refrigerant circuit (3), the four-way valve (30) is switched to the broken line side in FIG. 1, and the refrigerant circulates in a direction opposite to that during the humidification and freezing operation.
That is, the refrigerant discharged from the compressor (20) passes through the four-way valve (30) and flows into the evaporator (24). This refrigerant condenses in the evaporator (24) and melts the frost in the evaporator (24). And evaporator (2
The refrigerant flowing out of 4) is expanded by the expansion valve (23), and is condensed by the condenser (21).
After returning to the compressor (20) through the four-way valve (30). The defrost operation is performed for a predetermined time, and when a predetermined time elapses from the start of the defrost operation, the four-way valve (30) is switched to the solid line side in FIG. 1, and the above-described humidification and refrigeration operation is restarted.

On the other hand, in the water circulation circuit (2), when the defrost operation is started, the water supply / drain controller (50) detecting the defrost operation stops the pump (4), and the water supply solenoid valve (12) and the water The solenoid valve (14) is opened. As a result, a part of the water in the tank (6) is discharged out of the tank (6) through the drain pipe (13), while the water is replenished into the tank (6) through the water supply pipe (11). Then, when the defrost operation of the refrigerant circuit (3) is completed and the humidification and refrigeration operation of the refrigerant circuit (3) is started, the water supply / drain controller (50) is operated by the water supply electromagnetic valve.
(12) and the drainage solenoid valve (14)
Start (4).

Therefore, during the defrost operation, the tank (6)
A part of the water in the water is replaced, and the hard component of the water in the water circulation circuit (2) is diluted. Therefore, when the humidification / freezing operation and the defrost operation are regarded as one cycle, the water in the water circulation circuit (2) is purified for each cycle. Therefore,
The water quality of the water circulation circuit (2) will be maintained for a long time.

-Test Results- FIGS. 9A and 9B are graphs showing test results showing the relationship between humidification time and decrease in humidification ability. FIG. 9 (a)
Fig. 9B shows the test results when the water in the tank (6) is not replaced, and Fig. 9B shows the test results when the water in the tank (6) is replaced as described above during the defrost operation. In this embodiment, half of the water in the tank (6) is replaced during the defrost operation. As is clear from FIG. 9 (a), when the water in the tank (6) is not replaced, the humidification amount of the permeable membrane humidifier (5), that is, the humidification capacity, decreases according to the humidification time. On the other hand, from FIG.
If a part of the water in (6) is replaced, use a moisture permeable humidifier.
It can be seen that the humidification ability of (5) is maintained.

Thus, the above test was conducted using the amount of water exchanged in the tank (6) as a parameter. As a result, the life of the moisture permeable humidifier (5) was predicted as shown in Table 1. here,
For example, "double enrichment" refers to tanks during defrost operation.
(6) means that half of the water in the tank (6) is replaced, and "six times concentration" means that 1/6 of the water in the tank (6) is replaced. The life is (life) = (total humidification amount) ÷
It was calculated as (initial capacity × 0.8).

[0088]

[Table 1]

As shown in Table 1, the water in the tank (6) was
By replacing about ４ to 1/3, a moisture permeable humidifier
(5) The service life can be effectively extended.

Therefore, in this embodiment, the capacity of the tank (6) is designed so that about 1/3 of the water in the tank (6) is replaced during the defrost operation. More specifically, the amount of humidification during the humidification / freezing operation and the amount of water replaced during the defrost operation are determined from the initial setting of the refrigerator (1). Therefore, the tank capacity is determined from these values in consideration of the amount of water supplied during the humidification and freezing operation.

-Effects of Refrigerator (1)-As described above, in the present refrigerator (1), an increase in the concentration of hard components in water in the water circulation circuit (2) is suppressed, and the water quality is maintained. Scale deposition in the moisture permeable humidifier (5) is suppressed. Therefore, the performance of the moisture-permeable membrane humidifier (5) is less reduced, and the moisture-permeable membrane humidifier (5) can perform the accurate and reliable humidification operation for a long period of time.

In particular, in the present refrigerator (1), a permeable membrane humidifier
(5) To reduce the sensible heat load,
The amount of air supplied to (5) is reduced, and high-temperature water is supplied to the permeable membrane humidifier (5). Therefore, the moisture permeable membrane humidifier (5) is used in an environment where scale is likely to occur as compared with the conventional moisture permeable membrane humidifier that supplies relatively low-temperature water. However, as mentioned above, the plumbing controller
Since the water quality of the water circulation circuit (2) is maintained by (50), the performance of the moisture permeable membrane humidifier (5) is extremely low. That is, in the present refrigeration system (1), high-temperature water can be circulated through the permeable membrane humidifier (5) for a long period of time, so that the operation for suppressing the sensible heat load can be performed. Has become.

Further, according to the present refrigerator (1), the refrigerant circuit
Since the pump (4) and the blower (16) of the water circulation circuit (2) are operated or stopped in conjunction with the ON / OFF state of the compressor (20) of (3), humidification is performed when dehumidification is not performed. , And dehumidification and humidification can always be performed simultaneously. Therefore, there is no difference in timing between dehumidification and humidification, and there is no so-called response delay. Further, a humidity sensor becomes unnecessary.

Further, not only the dehumidification and the humidification are linked, but also the dehumidification amount is calculated in advance and the humidification amount is set so as to be equal to the dehumidification amount. There is no gap between them. Therefore, it is possible to stably maintain the humidity in the prefab (27) with high accuracy.
The water circulating circuit (2), which can control the temperature of circulating water, is provided with a moisture permeable membrane humidifier (5), and water at a predetermined temperature is circulated through the moisture permeable membrane humidifier (5). The humidification amount can be changed only by. Therefore, the humidification amount can be easily controlled only by adjusting the temperature of the circulating water.

<Embodiment 2> Refrigerator according to Embodiment 2
(41) is for the tank regardless of the operating state of the refrigerant circuit (3).
(6) The water quality of the water circulation circuit (2) is maintained by replacing a part of the water in the water periodically or intermittently.

The refrigeration apparatus (41) is the refrigeration apparatus of the first embodiment.
In (1), the water supply / drain controller (50) is deleted, and the tank (6) and the drain pipe (13) are modified. FIG.
As shown in FIG. 0, the drainage pipe (13b) of the present refrigerator (41) is formed by an inverted U-shaped pipe whose tip is opened downward. The drain pipe (13b) has its top (42), that is, the center of the U-shaped pipe, at the same height as the OFF position of the float switch (10). The opening (43) of the drain pipe (13b) is
Above the ON position of the float switch (10) and OFF
It is provided below the position. As in the first embodiment,
The water supply pipe (11) is provided with a water supply solenoid valve (12), and the water supply solenoid valve (12) is connected to the float switch (10).

With the humidifying operation of the moisture permeable humidifier (5), the amount of water in the water circulation circuit (2) decreases. As a result, the tank
The water level in (6) drops, and the float switch (10) is turned on as shown in FIG. Then, the water supply solenoid valve (12)
Is opened, and water is supplied to the tank (6) through the water supply pipe (11). Then, the water level in the tank (6) rises, the float switch (10) switches to the OFF state, and the water supply solenoid valve (1
2) is closed. At this time, as shown in FIG. 11, since the water level of the tank (6) becomes equal to the top (42) of the drain pipe (13b), the portion located above the opening (43) of the drain pipe (13b). Is discharged out of the tank (6) through the drain pipe (13b). As a result, as shown in FIG. 12, the water level of the tank (6) becomes equal to the position of the opening (43) of the drain pipe (13b).

Therefore, by the above operation, the drain pipe (13b)
The amount of water corresponding to the water level difference ΔL between the top (42) and the opening (43) is replaced. That is, every time the float switch (10) is turned on, a predetermined amount of water is replaced.

The interval at which the float switch (10) is switched and the amount of water exchanged at one time are determined by humidifying the humidifier (5) so that the hard component of water in the water circulation circuit (2) does not exceed a predetermined amount. It is set in consideration of the volume and capacity of the tank (6). The interval at which the float switch (10) is switched is adjusted by the height difference between the ON position and the OFF position of the float switch (10). The amount of water exchanged at one time depends on the drain (13b)
It is adjusted by the height difference between the top (42) and the opening (43).

Therefore, also in the second embodiment, since the water quality of the water circulation circuit (2) is maintained, scale generation in the moisture permeable membrane humidifier (5) can be suppressed. for that reason,
It is possible to extend the life of the moisture permeable humidifier (5).

<Third Embodiment> A refrigeration apparatus according to a third embodiment has a tank (6) irrespective of the operating state of the refrigerant circuit (3).
By constantly changing part of the water inside, the water circulation circuit
The water quality of (2) is maintained.

The third embodiment is different from the refrigeration apparatus (1) of the first embodiment.
, The plumbing controller (50) was deleted and the tank
(6) The water pipe (11) and the drain pipe (13) are modified. As shown in FIG. 13, the water supply pipe (11) of the present embodiment is provided with a bypass passage (45) in parallel with the water supply solenoid valve (12). An orifice plate (44) is provided in the bypass passage (45) as an orifice (throttle mechanism) for adjusting a flow rate per unit time to a predetermined amount. As in the first embodiment, a drain pipe (13) provided with a drain solenoid valve (14) is connected to the bottom of the tank (6). Solenoid valve for water supply (12)
The drain valve (14) is connected to the float switch (10), and when the float switch (10) is turned on, the drain valve (14) is closed while the water supply valve (12) is opened. When the float switch (10) is turned off, the drain solenoid valve (14) is opened while the water feed solenoid valve (12) is closed. The drain pipe (13) is designed to drain the water in the tank (6) at a slow speed corresponding to the flow rate of the water supplied through the bypass passage (45).
The diameter is smaller than the water supply pipe (11).

The cross-sectional area of the flow path of the orifice plate (44) of the bypass passage (45) is adjusted so that the hard component of water in the water circulation circuit (2) does not exceed a predetermined amount. Quantity or tank
It is set in consideration of the capacity of (6). Also, the orifice plate (44) is designed to easily respond to changes in humidification amount,
The flow path cross-sectional area is configured to be adjustable.

As described above, since a part of the water in the tank (6) is constantly replaced, the hard component of the water in the water circulation circuit (2) is maintained at a constant value, and the water quality is maintained. Therefore, the generation of scale in the moisture permeable membrane humidifier (5) can be suppressed, and the life of the moisture permeable membrane humidifier (5) can be extended.

[0105]

As described above, according to the first or sixth aspect, since a part of the water in the storage means of the water circulation circuit is replaced, an increase in the concentration of the hard component of the water can be suppressed. , Scale deposition can be suppressed. Therefore, it is possible to suppress the performance deterioration of the humidifying means or the permeable membrane humidifier, and it is possible to achieve a longer life.

According to the second aspect of the present invention, the water is not replaced during the freezing operation, and the water is replaced only during the defrosting operation in which the humidifying operation is unnecessary. Can be stabilized.

According to the third or seventh aspect, a water exchange operation can be performed with a specific configuration. Since the drain valve does not require an electromagnetic valve, the cost of the apparatus can be reduced.

According to the fourth or eighth aspect, since a part of the water in the storage means is always replaced, the water quality of the water circulation circuit is always kept good, and the performance of the humidifying means or the permeable membrane humidifier is maintained. Deterioration can be suppressed over a long period. Therefore, it is possible to extend the life of the humidifying means or the humidifier.

According to the fifth or ninth aspect of the present invention, the amount of water supplied or discharged from the storage means can be adjusted by the orifice, so that a part of the water in the storage means can be constantly replaced with a simple configuration. It becomes possible.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a refrigerator.

FIG. 2 is a flowchart showing a method for setting a target water temperature.

FIG. 3 is an air line diagram showing inlet air conditions and outlet air conditions of a moisture permeable membrane humidifier.

FIG. 4 is a diagram showing a dehumidification amount with respect to an inlet air condition.

FIG. 5 is a diagram showing humidification amounts with respect to inlet air conditions and water temperature in a moisture permeable humidifier.

FIG. 6 is a flowchart illustrating a method of calculating a processing air volume and a sensible heat load.

FIG. 7 is a diagram showing a relationship between outlet air temperature and sensible heat load.

FIG. 8 is a diagram illustrating a relationship between an outlet air temperature and a processing air volume.

FIGS. 9A and 9B are diagrams showing deterioration over time of the moisture-permeable membrane humidifier, where FIG. 9A shows a case where water is not replaced, and FIG. 9B shows a case where half of water in a tank is replaced.

FIG. 10 is a configuration diagram of a tank portion according to a second embodiment.

FIG. 11 is a diagram corresponding to FIG. 10 after water supply.

FIG. 12 is a diagram corresponding to FIG. 10 after drainage.

FIG. 13 is a configuration diagram of a tank portion according to a third embodiment.

[Explanation of symbols]

 (2) Water circulation circuit (3) Refrigerant circuit (4) Pump (5) Moisture permeable humidifier (6) Tank (10) Float switch (11) Water supply pipe (12) Water supply solenoid valve (13) Drain pipe (14 ) Drainage solenoid valve (24) Evaporator (50) Supply / drain controller

 ──────────────────────────────────────────────────の Continued on front page (72) Inventor Haruo Onishi 1304 Kanaokacho, Sakai City, Osaka Daikin Industries Inside Kanaoka Plant of Sakai Seisakusho Co., Ltd. (72) Keiji Arii 1304 Kanaokacho, Sakai City, Osaka Daikin Industries Stock (72) Kumaoka Asahina, Inventor 1304, Kanaokacho, Sakai-shi, Osaka Daikin Industries, Ltd.Kanaoka Factory

Claims (9)

[Claims] 1. A cooler (24) for cooling air in a refrigerator, and a water flow path (15) separated from an air passage by a porous member for preventing passage of water and allowing only water vapor to pass therethrough, A humidifying means (5) for supplying steam from the water in the water flow path (15) to the air in the refrigerator through the porous member, wherein the humidifying means (5) is recovered from the humidifying means (5). A water circulating circuit (2) connected to a storage means (6) for storing the collected water and a circulating drive means (4) for supplying the water of the storage means (6) to the humidifying means (5); A water supply means (11a) for supplying water to the means (6); a drainage means (13a) for discharging water of the storage means (6); and a water supply means for replacing part of the water of the storage means (6). A refrigerating apparatus comprising: a water supply means (11a); and a water supply / drainage control means (50) for controlling the drainage means (13a). 2. The refrigeration apparatus according to claim 1, wherein the refrigeration operation and the defrost operation of the cooler (24) can be selectively executed freely. Water supply means
(11a) and the operation of the drainage means (13a) are stopped while the water supply means (11a) and the drainage means (13
a) A refrigeration apparatus characterized by operating. 3. A cooler (24) for cooling air in the refrigerator, and a water flow path (15) partitioned from an air passage by a porous member for preventing passage of water and allowing only water vapor to pass therethrough, A humidifying means (5) for supplying steam from the water in the water flow path (15) to the air in the refrigerator through the porous member, wherein the humidifying means (5) is recovered from the humidifying means (5). A water circulating circuit (2) connected to a storage means (6) for storing the collected water and a circulating drive means (4) for supplying the water of the storage means (6) to the humidifying means (5); The means (6) includes a water supply means (11a) for supplying water to the storage means (6), a drainage means (13a) for discharging water from the storage means (6), a first predetermined water level and the A water level sensor (10) for detecting a second predetermined water level higher than the first predetermined water level is provided. The water supply means (11a) includes a water supply pipe (11) and a water supply valve provided on the water supply pipe (11). (12) The water supply valve (12) is opened when the water level of the storage means (6) decreases and the water level sensor (10) detects a first predetermined water level, while the water level of the storage means (6) is Rises and the water level sensor (10)
Is configured to close when a second predetermined water level is detected, and the drainage means (13a) performs drainage when the water level of the storage means (6) rises and reaches the second predetermined water level, and reduces the water level. The first
The opening (43) opens downward at the intermediate water level and the top (42) is positioned at the second predetermined water level so as to lower the water level to a predetermined intermediate water level between the predetermined water level and the second predetermined water level. A refrigerating device characterized by being constituted by an inverted U-shaped tube (13b). 4. A cooler (24) for cooling air in the refrigerator, and a water flow path (15) partitioned from an air passage by a porous member for preventing passage of water and passing only steam. A humidifying means (5) for supplying steam from the water in the water flow path (15) to the air in the refrigerator through the porous member, wherein the humidifying means (5) is recovered from the humidifying means (5). A water circulating circuit (2) connected to a storage means (6) for storing the water collected and a circulating drive means (4) for supplying the water of the storage means (6) to the humidifying means (5); The means (6) includes a water supply means (11a) for constantly supplying a predetermined amount of water to the storage means (6) so that a part of the water of the storage means (6) is constantly replaced, and a water supply means (11a). 6. A refrigeration system comprising a drainage means (13a) for constantly discharging a predetermined amount of water from (6). 5. The refrigeration apparatus according to claim 4, wherein the water supply means (11a) or the drainage means (13a) includes a water pipe (11, 13) for constantly flowing water and the water pipe (11, 1).
3) A refrigeration apparatus comprising an orifice (44) provided in (1). 6. A moisture-permeable membrane humidifier (5), said moisture-permeable membrane humidifier
A storage means (6) for storing the water recovered from (5), and a circulation drive means (4) for supplying the water from the storage means (6) to the moisture permeable humidifier (5) are connected. A water circulation circuit (2), a water supply means (11a) for supplying water to the storage means (6), a drainage means (13a) for discharging water from the storage means (6), and a water supply means (6). A humidifier comprising: a water supply / drainage control means (50) for controlling the water supply means (11a) and the drainage means (13a) so as to replace a part of water. 7. A moisture-permeable membrane humidifier (5), said moisture-permeable membrane humidifier
A storage means (6) for storing the water recovered from (5), and a circulation drive means (4) for supplying the water from the storage means (6) to the moisture permeable humidifier (5) are connected. The storage means (6) includes a water circulation circuit (2), the storage means (6) includes a water supply means (11a) for supplying water to the storage means (6), and a drain means (13a) for discharging water from the storage means (6). And a water level sensor (10) for detecting a first predetermined water level and a second predetermined water level higher than the first predetermined water level. The water supply means (11a) includes a water supply pipe (11) and the water supply A water supply valve (12) provided in the pipe (11), wherein the water level of the storage means (6) decreases and the water level sensor (10) detects a first predetermined water level Then, while opening, the water level of the storage means (6) rises and the water level sensor (10)
Is configured to close when a second predetermined water level is detected, and the drainage means (13a) performs drainage when the water level of the storage means (6) rises and reaches the second predetermined water level, and reduces the water level. The first
The opening (43) opens downward at the intermediate water level and the top (42) is positioned at the second predetermined water level so as to lower the water level to a predetermined intermediate water level between the predetermined water level and the second predetermined water level. A humidifying device comprising an inverted U-shaped tube (13b). 8. A moisture permeable humidifier (5), said moisture permeable humidifier
A storage means (6) for storing the water recovered from (5), and a circulation drive means (4) for supplying the water from the storage means (6) to the moisture permeable humidifier (5) are connected. A water circulation circuit (2), wherein the storage means (6) constantly supplies a predetermined amount of water to the storage means (6) such that a part of the water in the storage means (6) is constantly replaced; A humidifier comprising: a means (11a); and a drainage means (13a) for constantly discharging a predetermined amount of water from the storage means (6). 9. The humidifier according to claim 8, wherein the water supply means (11a) or the drainage means (13a) comprises: a water pipe (11, 13) for constantly flowing water; and the water pipe (11, 13). A humidifier comprising an orifice (44) provided in the humidifier.