JP2953683B2 - Dehumidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifying device, and more particularly to a dehumidifying device for dehumidifying a fluid to be dehumidified such as air by heat exchange.

[0002]

2. Description of the Related Art Generally, a dehumidifying device of this kind includes a compressor,
A refrigeration circuit including a condenser and the like is provided, and the refrigerant is cooled by the refrigeration circuit. The dehumidifier has an evaporator.

When high-temperature humid air is supplied from the outside, the high-temperature humid air comes into contact with a refrigeration circuit in the evaporator, so that heat exchange is performed between the high-temperature humid air and the refrigerant. As a result, the high-temperature humid air is cooled and dried, heated by the reheater, and then sent out again.

The conventional dehumidifier is provided with a switch which can be operated externally. The operation of the compressor in the refrigeration circuit is controlled based on the on / off switching operation of the switch.

[0005]

However, in a conventional dehumidifier in which the operation of the compressor is turned on / off by a switch, the operation of the compressor is continued unless the switch is turned off. Therefore, even when the high-temperature humid air is not supplied to the evaporator, a state in which the dehumidifier is driven occurs, and wasteful power is consumed.

It is very troublesome for an operator to turn off the switches one by one when the high-temperature humid air is not dehumidified in order to suppress the power consumption. The present invention has been made in view of the above circumstances, and its purpose is to automatically drive a compressor as necessary, thereby saving power and making it difficult for a worker to perform daily switch operations. An object of the present invention is to provide a dehumidifier capable of avoiding operation.

[0007]

To solve the above problems, the present invention provides a compressor for compressing a refrigerant gas, a condenser for condensing a compressed refrigerant gas sent from the compressor into a liquid refrigerant, A refrigerating circuit comprising an evaporator for evaporating the liquid refrigerant sent from the evaporator;
In the dehumidifying device for dehumidifying the pressure of the compressed gas,
A pressure detecting means for detecting the pressure is provided, and the pressure is detected by the pressure detecting means.
When the output pressure is lower than the predetermined reference stop pressure value
Stops the operation of the compressor, and
If the detected pressure is equal to or higher than the predetermined reference
In this case, the gist is to start driving the compressor .

[0008]

Therefore, according to the present invention, the pressure of the compressed gas is
Detected by force detection means and detected by pressure detection means
If the measured pressure is lower than the predetermined reference stop pressure,
The drive of the compressor is stopped and the pressure detected by the pressure detection
If the force is equal to or higher than the predetermined reference
Driving starts. As a result, the external compressor etc. stopped
And the compressed gas is not sent to the dehumidifier
Stops the operation of the dehumidifier, while the external
Use compressed gas after dehumidification while driving a presser, etc.
To temporarily stop the supply of compressed gas on the external device side.
In this case, the operation of the dehumidifier will not be stopped,
Need to perform cumbersome switch operations normally performed by the user
Run out and the compressor stops unexpectedly.
Not even.

[0009]

FIG. 1 shows an embodiment of a dehumidifier according to the present invention. Pre-cooling inside the dehumidifier 1
The reheater 2 and the evaporator 3 are each partitioned.

First, the structure of a refrigeration circuit R for cooling a refrigerant (in this embodiment, CFC is used) will be described. A compressor drive motor 6 is connected to a compressor 5 as a compressor. The compressor drive motor 6 is connected to a power supply 7. Then, the compressor 5 is operated by driving the compressor drive motor 6 to compress the refrigerant gas.

An accumulator 8 is mounted on the upstream side of the compressor 5. The accumulator 8 temporarily holds the liquid refrigerant, and does not supply the liquid refrigerant to the compressor 5 but supplies only the refrigerant gas.

A condenser 9 as a condenser is connected downstream of the compressor 5. A fan 10 for blowing air to the condenser 9 is installed near the condenser 9. A pressure switch 4 is provided between the compressor 5 and the condenser 9. A fan drive motor 11 is connected to the fan 10, and the fan drive motor 11 is connected to the power supply 7 via the pressure switch 4. Then, the compressed refrigerant gas sent from the compressor 5 to the condenser 9 is cooled by the blowing action of the fan 10.

A filter dryer 12 is mounted downstream of the condenser 9. This filter dryer 1
2 comprises a filter and a desiccant (not shown),
Dust and moisture in the flow path are removed.

At the downstream side of the filter dryer 12, a capillary tube 13 for reducing the pressure is mounted. An orifice (not shown) is formed in the capillary tube 13 so as to reduce the pressure of the liquid refrigerant passing through the orifice.

A refrigeration passage 14 is connected to the downstream side of the capillary tube 13, and the refrigeration passage 14 is formed to meander in the evaporator 3. A large number of fins 14a are attached to the freezing passage 14 to further enhance the heat radiation effect. The downstream side of the refrigeration passage 14 is connected to the accumulator 8.

The main flow path R ₁ of the refrigeration circuit R is formed by the accumulator 8, the compressor 5, the condenser 9, the filter dryer 12, the capillary tube 13, and the refrigeration passage 14.

[0017] the main passage R _1, the capacitor 9, bypass flow passage R ₂ is connected with a parallel relationship to the filter dryer 12 and the capillary tube 13. This is the bypass flow passage R ₂ have pressure capacity control valve 15 of the mechanical is provided, bypass passage R ₂ by the pressure capacity control valve 15
Communication is interrupted. Incidentally, the pressure capacity control valve 15 by performing the connection and disconnection of the bypass flow path R ₂ by the pressure fluctuations on the upstream side, the pressure on the upstream side, that is, to hold the pressure of the refrigeration passage 14 constant at all times.

Next, the structure of the dehumidifying fluid circuit S, which supplies high-temperature humid air as a dehumidifying fluid from the external compressor 16 to make it cool and dry air in the evaporator 3 and then take it out again, will be described.

The external compressor 16 has an air supply passage 1
7, the air supply passage 17 is connected to the pre-cooling
The reheater 2 is connected to a precooling passage 18. The precooling passage 18 is formed in a meandering manner.

The evaporator 3 is located downstream of the precooling passage 18.
The inside cooling passage 19 is connected. Then, heat exchange is performed by contact between the high-temperature humid air passing through the cooling passage 19 and the freezing passage 14. The evaporator 3 communicates with a drain (not shown) through a drain outlet 20, and the water in the evaporator 3 is discharged from the drain outlet 20.

A reheat passage 22 in the precooling / reheater 2 is connected to a downstream side of the cooling passage 19 via a connection passage 21. The reheating passage 22 is formed to meander so as to be in contact with the pre-cooling passage 18. Further, an external air take-out passage 23 is connected to the downstream side of the reheat passage 22.

The air supply passage 17 and the pre-cooling passage 1
The cooling passage 19, the connection passage 21, the reheating passage 22, and the air take-out passage 23 form a fluid circuit S to be dehumidified.

A pressure switch 24 as pressure detecting means is provided in the air outlet passage 23. The pressure switch 24 is adapted to detect at all times the pressure of the air in the air taking-out passage 23. The pressure switch 24 is electrically connected to the power supply 7. The pressure switch 24 closes an electric contact (not shown) when the pressure in the air take-out passage 23 becomes 1.7 kgf / cm ² (reference start pressure value) or more. The power supply 7 is automatically supplied. When the pressure in the air outlet passage 23 becomes 0.7 kgf / cm ² (reference stop pressure value) or less, the electric contacts are opened to automatically cut off the supply of the power 7 to the motors 6 and 11. It is supposed to be.

Next, the dehumidifier 1 constructed as described above
The operation of will be described. Now, from the external compressor 16,
When high-temperature humid air is supplied to the air supply passage 17, the pre-cooling passage 18, the cooling passage 19, the connection passage 21, and the reheating passage 22
The high-temperature humid air is supplied to the air take-out passage 23 through the air. The pressure switch 24 is always in the air extraction passage 2
When the pressure of the air inside 3 is gradually increased and becomes 1.7 kgf / cm ² or more, the electric contact is closed and the power supply 7 is supplied to the compressor drive motor 6, which drives the compressor drive motor 6. Start automatically.

When the compressor drive motor 6 starts driving, the pressure switch 4 in the refrigeration circuit R detects the pressure, the power supply 7 is supplied to the fan drive motor 11, and the fan 10 starts driving. Then, the refrigerant circulates in the refrigeration circuit R. That is, the low-pressure refrigerant gas is compressed by the compressor 5 to become a compressed refrigerant gas, and is cooled in the condenser 9 to become a compressed liquid refrigerant. Then, after dust and moisture are removed by the filter dryer 12, the pressure is reduced by the capillary tube 13 to become a low-pressure liquid refrigerant.

When the liquid refrigerant passes through the freezing passage 14, heat exchange is performed between the liquid refrigerant and the high-temperature humid air passing through the cooling passage 19. As a result, the liquid refrigerant in the refrigeration passage 14 becomes a low-pressure high-temperature refrigerant and is supplied to the accumulator 8.

On the other hand, the high-temperature humid air is cooled and dehumidified by heat exchange to become cooled dry air,
1 to the reheat passage 22. This reheat passage 22
Is in contact with the pre-cooling passage 18, so that heat exchange is also performed at this contacted portion. That is, heat exchange is performed between the cooling and drying air in the reheating passage 22 and the high-temperature and humid air in the pre-cooling passage 18, and the cooling and drying air is warmed to dry air and sent to the air extraction passage 23, The hot humid air is pre-cooled. Then, the dry air taken out from the air take-out passage 23 is supplied to, for example, an electromagnetic valve or an air cylinder.

Here, the driving of the external compressor 16 is stopped.
Is stopped and the supply of air to the air supply passage 17 is cut off.
, The pressure of the air in the air extraction passage 23 gradually decreases
I do. The air detected by the pressure switch 24
Pressure is 0.7kgf / cm ^TwoWhen the following, electrical contacts
To open the power supply 7 to both motors 6 and 11
You. As a result, the compressor drive motor 6 and the fan drive
The driving of the dynamic motor 11 is automatically stopped.

The external compressor 16 is turned on and off as needed according to the amount of air used by the electromagnetic valve, the air cylinder, and the like. Therefore, the external compressor 16
When the drive of the two motors 6 and 11 is controlled in conjunction with the turning on and off of the refrigerant, the cooling circulation operation of the refrigerant in the refrigeration circuit R becomes awkward. However, the pressure in the flow passage from the air supply passage 17 to the air take-out passage 23 is not instantaneous due to the stoppage of the driving of the external compressor 16 but is taken after a considerable time. Therefore, in the present embodiment, since the driving of the compressor 5 and the fan 10 is not immediately stopped by stopping the driving of the external compressor 16, even if the turning on and off of the external compressor 16 is repeated, the refrigeration circuit R The cooling and circulating operation of the refrigerant in the interior is not awkward.

Therefore, according to the present embodiment, the operation control of the dehumidifier 1 can be automatically performed without providing an operation switch for operating the compressor 5 in the dehumidifier 1, so that the operator is complicated. There is no need to perform simple switch operations.

When air is not supplied from the external compressor 16, the compressor 5 and the fan 10 are not driven, so that power can be saved. It should be noted that the present invention is not limited to only the above-described embodiment, and can be carried out as follows without departing from the spirit of the present invention.

(1) In the above embodiment, an example using air as the fluid to be dehumidified has been described. However, the present invention may be implemented using other fluids such as nitrogen and helium. (2) In the above embodiment, the pressure switch 24 is connected to the dehumidifier 1
The pressure switch 24 may be provided in the air supply passage 17 or the passages 18 and 22 in the pre-cooling / reheating device 2, though the pressure switch 24 is provided in the external air take-out passage 23.

[0033]

(3) In the above embodiment, the switch for turning on / off the drive of the compressor drive motor 6 is omitted from the illustration. However, it is of course possible to attach the switch and use it as an auxiliary.

[0035]

As described in detail above, according to the present invention,
The pressure of the compressed gas is detected by pressure detecting means, and the pressure is detected.
Pressure detected by the outlet means is a predetermined reference stop pressure
If the pressure is less than the value, the operation of the compressor is stopped and the pressure detection
Is greater than or equal to the predetermined reference start pressure value
In the case of, the driving of the compressor starts. As a result, external
The compressed gas stops and the compressed gas is sent to the dehumidifier.
If not, the operation of the dehumidifier will stop.
On the other hand, after dehumidifying while driving an external compressor, etc.
Supply the compressed gas on the external equipment side that uses the compressed gas.
Do not stop the operation of the dehumidifier when stopping
Troublesome switches that workers normally perform
Switch operation can be avoided and the compressor
Does not stop.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a configuration diagram of a dehumidifier.

[Description of Signs] 3 ... Evaporator, 5 ... Compressor as compressor, 9 ... Condenser as condenser, 24 ... Pressure switch as pressure detecting means, R ... Refrigeration circuit.

Continuation of the front page (51) Int.Cl. ⁶ identification code FI F25B 1/00 371 F25B 1/00 371E (58) Field surveyed (Int.Cl. ⁶ , DB name) F25B 1/00 303 F25B 1/00 341 G F25B 1/00 361 Q F25B 1/00 371 E B01D 53/26 A F24F 11/02 102 D

Claims (1)

(57) [Claims] 1. A compressor (5) for compressing a refrigerant gas, a condenser (9) for condensing a compressed refrigerant gas sent from the compressor (5) into a liquid refrigerant, and a condenser (9) sent from the condenser (9). And a refrigerating circuit (R) including an evaporator (3) for evaporating the compressed liquid refrigerant.
In dehumidifying apparatus for a pressure detecting means for detecting the pressure of the compressed gas (24)
And the pressure detected by the pressure detecting means (24) is
If the pressure is equal to or less than a predetermined reference stop pressure value, the compressor
The driving of (5) is stopped and the pressure detecting means (24)
The detected pressure is equal to or higher than a predetermined reference start pressure value.
A dehumidifier, wherein the compressor (5) is started to drive in such a case.