JPH07332769A - Refrigerating type dehumidifier - Google Patents

Abstract

PURPOSE:To provide a refrigerating type dehumidifier which can prevent condensation at a discharge tube. CONSTITUTION:Refrigerant gas is compressed by a compressor 5 to become a compressed refrigerant gas, which is fed to a condenser 9. The gas is cooled by the condenser 9 to become a liquid refrigerant, which is fed to a refrigerating passage 14. A cooling chamber 3 is cooled by the passage 14. High-temperature wet air is supplied into the chamber 3 via an air supply tube 17 and a precooling tube 18, and cooled in the chamber 3 to be dehumidified to become dehumidified air. The dehumidified air is fed from the chamber 3 to a reheating tube 22. In this case, since the atmosphere is fed to the tube 22 by a second fan 31, the dehumidified air is heated by the atmosphere to become the temperature near that of the atmosphere.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating type dehumidifying device,
More specifically, the present invention relates to a dehumidifying device that dehumidifies a fluid to be dehumidified such as air by heat exchange.

[0002]

2. Description of the Related Art Generally, a refrigerating type dehumidifying device has a refrigerating circuit including a compressor, a condenser and the like. The refrigeration circuit passes through a cooling chamber provided in the refrigerating type dehumidifier, and a delivery pipe and an extraction pipe are connected to the cooling chamber.

Then, when the outside air temperature is, for example, 33 ° C., high-temperature humid air of, for example, 35 ° C. is sent out from the delivery pipe into the cooling chamber, the high-temperature humid air contacts the refrigeration circuit in the cooling chamber, and the high-temperature humid air and the refrigeration circuit. A heat exchange is carried out between and. As a result, the high-temperature humid air becomes dehumidified air at about 10 ° C., and the dehumidified air is sent out to the pneumatic equipment such as an air cylinder provided outside the refrigeration type dehumidifying device through the take-out pipe.
Further, the delivery pipe and the extraction pipe are arranged so as to be in contact with each other, and the dehumidified air in the extraction pipe is reheated to about 20 ° C. by the high temperature moist air in the delivery pipe.

[0004]

However, it was not possible to heat the dehumidified air to the same degree as the outside air temperature of 33 ° C. simply by bringing the delivery pipe and the extraction pipe into contact with each other. Therefore, the temperature difference between the temperature of the dehumidified air and the outside air causes dew condensation on the extraction pipe, and the dew drops as water drops. As a result, there is a problem that water accumulates on the floor surface where the refrigerating / dehumidifying device is installed, and the floor surface becomes dirty.

Further, when the amount of dehumidified air used in the pneumatic equipment installed on the downstream side of the dehumidifying device is small, the flow rate of the hot humid air passing through the cooling chamber becomes small, so that the flow velocity of the hot humid air becomes slow. . Therefore, the hot humid air slowly passes through the cooling chamber to be cooled, and the excessively cooled dehumidified air flows through the extraction pipe. As a result, the temperature difference between the temperature of the dehumidified air and the outside air temperature becomes large, and dew condensation tends to occur particularly on the extraction pipe. Further, even when the outside air is hot and humid, dew condensation is likely to occur on the extraction pipe as well.

The present invention has been made to solve the above problems, and an object thereof is to provide a refrigerating type dehumidifying device capable of preventing the occurrence of dew condensation on the take-out pipe.

[0007]

In order to solve the above problems, in the invention described in claim 1, a compressor for compressing a refrigerant gas and a compressed refrigerant gas sent from the compressor are cooled to be a liquid refrigerant. A condenser that condenses and a heat exchanger that evaporates the liquid refrigerant sent from the condenser are provided in the refrigeration circuit, and in the refrigeration dehumidifier that cools and dehumidifies the fluid to be dehumidified by the heat exchanger, the heat A cooling chamber for cooling the room by an exchanger is provided, and a delivery pipe for sending out the dehumidified fluid and an extraction pipe for taking out the dehumidified fluid are connected to the cooling chamber,
A blower for blowing outside air was provided in the extraction pipe.

According to a second aspect of the present invention, in the refrigerating / dehumidifying device according to the first aspect, a pre-cooling / reheating section which makes mutual contact with the extraction pipe and the delivery pipe is provided, and the outside air is blown to the pre-cooling / reheating section. A blower was installed to do so.

According to a third aspect of the present invention, in the refrigerating and dehumidifying device according to the second aspect, a large number of heat absorbing plates are provided in the precooling / reheating section.

[0010]

Therefore, according to the first aspect of the present invention, the refrigerant gas is compressed by the compressor to become the compressed refrigerant gas and sent to the condenser. The compressed refrigerant gas is cooled by the condenser, becomes a liquid refrigerant, and is sent to the heat exchanger. Then, the cooling chamber is cooled by the heat exchanger. Further, the fluid to be dehumidified is supplied into the cooling chamber through the delivery pipe, and is dehumidified by being cooled in the cooling chamber. The dehumidified fluid to be dehumidified is sent out from the cooling chamber to the extraction pipe and circulates in the extraction pipe. At this time, since the outside air is blown to the extraction pipe by the blower, the fluid to be dehumidified is heated by the outside air and has the same temperature as the outside air. Therefore, the occurrence of dew condensation on the take-out pipe is prevented.

According to the second aspect of the present invention, in addition to the operation of the first aspect of the invention, the extraction pipe and the delivery pipe are provided with a precooling / reheating portion which is in contact with each other. The outside air is blown by the blower. Therefore, the dehumidified fluid flowing through the extraction pipe is heated by both the dehumidified fluid before dehumidification and the outside air. Therefore, the dehumidified fluid is efficiently heated to the same temperature as the outside air temperature.

According to the invention of claim 3, in addition to the function of the invention of claim 2, since the pre-cooling / reheating part is provided with the heat absorbing plate, the outside air blown to the pre-cooling / reheating part by the blower is provided. Heat is efficiently transferred to the dehumidifying fluid in the extraction pipe. Therefore, the fluid to be dehumidified is more efficiently heated to the outside air temperature.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to FIG. As shown in FIG. 1, a refrigeration type dehumidifier 1
The interior of is divided into a pre-cooling / reheating chamber 2 and a cooling chamber 3, respectively.

First, the structure of the refrigeration circuit R for cooling the cooling chamber 3 will be described. The compressor 5 as a compressor.
A compressor drive motor 6 is connected to the compressor drive motor 6, and the compressor drive motor 6 is connected to a power source (not shown). Then, the compressor 5 is operated by driving the compressor drive motor 6, and the refrigerant gas is compressed.

An accumulator 8 is assembled on the upstream side of the compressor 5. The accumulator 8 temporarily holds the liquid refrigerant, and transfers the liquid refrigerant to the compressor 5
It is designed not to supply the refrigerant gas but to supply only the refrigerant gas.

A condenser 9 as a condenser is connected to the downstream side of the compressor 5, and a first fan 10 for blowing air to the condenser 9 is installed near the condenser 9. The first fan drive motor 11 is connected to the first fan 10, and the first fan drive motor 11 is connected.
Is connected to a power source (not shown). When the fan 10 is operated by the fan drive motor 11, the first fan 10 blows the outside air around the refrigeration / dehumidification device 1 to the condenser 9 and cools the compressed refrigerant gas fed from the compressor 5 to the condenser 9. It is like this.

A filter dryer 12 is installed downstream of the condenser 9. This filter dryer 12
A filter and a desiccant are built in to remove dust, water, etc. in the flow path.

A capillary tube 13 having a pressure-reducing action is assembled downstream of the filter dryer 12, and the capillary tube 13 reduces the pressure of the liquid refrigerant passing through the tube 13.

A freezing passage 14 as a heat exchanger is connected to the downstream side of the capillary tube 13, and the freezing passage 14 is formed so as to meander in the cooling chamber 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 freezing passage 14 is connected to the accumulator 8.

The accumulator 8, the compressor 5, the condenser 9, the filter dryer 12, the capillary tube 13 and the freezing passage 14 form a main flow path R1 of the refrigeration circuit R.

A bypass passage R2 having a parallel relationship with the condenser 9, the filter dryer 12 and the capillary tube 13 is connected to the main passage R1. A capacity adjustment valve 15 is provided in the bypass flow path R2, and the bypass flow path R2 is blocked by the capacity adjustment valve 15. The capacity adjusting valve 15 shuts off the communication of the bypass passage R2 due to the pressure fluctuation on the downstream side thereof, so that the pressure on the downstream side, that is, the pressure in the freezing passage 14 is always maintained at a certain pressure or higher.

Next, the structure of the dehumidified fluid circuit S which supplies high temperature moist air as the dehumidified fluid from the air compressor 16 to dehumidify the air in the cooling chamber 3 and then sends the dehumidified air to the outside again will be described.

An air supply pipe 17 as a delivery pipe is connected to the air compressor 16, and the air supply pipe 17 is connected to a precooling pipe 18 as a precooling / reheating section in the precooling / reheating chamber 2. ing. The pre-cooling pipe 18 is formed in a meandering shape, and the cooling passage 1 in the cooling chamber 3 is provided on the downstream side thereof.
9 is connected. Then, the high temperature moist air passing through the cooling passage 19 and the freezing passage 14 come into contact with each other to perform heat exchange. The cooling chamber 3 communicates with a drain (not shown) via a drain outlet 20, so that the water in the cooling chamber 3 is discharged from the drain outlet 20.

A reheating pipe 22 as a precooling / reheating section is connected to the downstream side of the cooling passage 19 via a connection passage 21. The reheating pipe 22 is formed in a meandering manner so as to come into contact with the precooling pipe 18, and on the downstream side of the reheating pipe 22, an air ejection pipe 23 as an ejection pipe provided outside the precooling / reheating chamber 2.
Are connected. A pneumatic device such as an air cylinder (not shown) is connected to the downstream side of the air extraction pipe 23.

A dehumidified fluid circuit S is formed by the air supply pipe 17, the pre-cooling pipe 18, the cooling passage 19, the connecting passage 21, the reheating pipe 22 and the air extracting pipe 23. The reheat pipe 22 and the precooling pipe 18 have a large number of fins 3 as heat absorbing plates.
0 is attached. Further, in the pre-cooling / reheating chamber 2, a second fan 31 as a blower for blowing air to the reheating pipe 22 and the precooling pipe 18 is installed near the reheating pipe 22 and the precooling pipe 18. A second fan drive motor 32 is connected to the second fan 31, and the fan drive motor 32 operates the second fan 31. Then, the second fan 31 takes in outside air into the precooling / reheating chamber 2 from the air intake 33 provided in the precooling / reheating chamber 2, and blows the outside air to the reheating pipe 22 and the precooling pipe 18. ing. Further, the outside air blown to the reheat pipe 22 and the precooling pipe 18 is exhausted from an air exhaust port 34 provided in the precooling / reheating chamber 2.

Next, when the outside air temperature is 33 ° C., about 3
The operation of dehumidifying the hot humid air of 5 ° C. by the refrigeration type dehumidifier 1 will be described. When the air compressor 16 is driven and high temperature moist air of, for example, 35 ° C. is supplied from the air supply pipe 17, air is introduced into the air extraction pipe 23 through the pre-cooling pipe 18, the cooling passage 19, the connection passage 21 and the reheating pipe 22. Is supplied.

When the compressor drive motor 6 starts driving, the refrigerant circulates in the refrigeration circuit R by the compressor 5. That is, the low-pressure refrigerant gas is compressed by the compressor 5 to become a compressed refrigerant gas, which is sent to the condenser 9. At this time, the first fan 10 is the refrigeration dehumidifier 1
By blowing the outside air around the condenser 9 to the condenser 9, the compressed refrigerant gas passing through the condenser 9 is cooled and becomes the compressed liquid refrigerant. Then, the compressed liquid refrigerant is the filter dryer 1
After the dust and water are removed at 2, the pressure is reduced by the capillary tube 13 to become a low-pressure liquid refrigerant. When the liquid refrigerant passes through the refrigeration circuit 14, heat exchange is performed between the liquid refrigerant and the high temperature moist air passing through the cooling passage 19 in the cooling chamber 3, and as a result, the liquid refrigerant in the refrigeration passage 14 becomes low-pressure refrigerant gas. 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 dehumidified air at about 10 ° C., and is sent to the reheat pipe 22 through the connection passage 21. This reheat tube 22
Is in contact with the pre-cooling pipe 18, so heat exchange is performed at this location. That is, heat exchange is performed between the dehumidified air in the reheat pipe 22 and the hot and humid air in the precooling pipe 18, so that the hot and humid air is precooled and the dehumidified air is reheated.

At this time, the second fan 31 draws the outside air taken into the precooling / reheating chamber 2 from the air intake 33 into the precooling pipe 1.
By sending air to the reheating tube 22 and the reheating tube 22, the dehumidified air in the reheating tube 22 is further heated. Also, the outside air hits a large number of fins 30 provided in the pre-cooling pipe 18 and the reheating pipe 22,
The heat of the outside air is efficiently transferred to the dehumidified air by the fins 30. Then, the dehumidified air in the reheat pipe 22 is supplied to the pre-cooling pipe 18
Since it is heated by both the high temperature humid air inside and the outside air blown from the second fan 31, the temperature of the dehumidified air becomes a temperature close to the outside air (in this case, about 33 ° C.) Sent out.

When the amount of dehumidified air used in the pneumatic equipment connected to the downstream side of the air extraction pipe 23 is small, the flow rate of the high temperature moist air flowing through the cooling passage 19 is small, so that the inside of the cooling passage 19 is cooled. The flow velocity of the flowing hot and humid air is slow. As a result, the hot humid air slowly passes through the cooling passage 19 and is cooled, so that the excessively cooled dehumidified air flows through the reheat pipe 22. Also in this case, since the outside air is blown to the reheat pipe 22 by the second fan 31, the dehumidified air in the reheat pipe 22 becomes a temperature close to the outside air temperature and is sent out to the air extraction pipe 23.

Further, even when the outside air temperature is high in temperature and humidity, the outside air heats the dehumidified air in the reheat pipe 22, so that the dehumidified air becomes a temperature close to the outside air temperature and is sent out to the air extraction pipe 23. .

As described above in detail, according to this embodiment, the second fan 31 blows the outside air to the reheat pipe 22, and the dehumidified air in the reheat pipe 22 is brought to a temperature close to the outside air temperature. Sent to 23. Therefore, the air extraction pipe 23
The temperature difference between the dehumidified air inside and the outside air is reduced, and it is possible to prevent the occurrence of dew condensation on the air extraction pipe 23. As a result, it is possible to prevent the floor surface on which the refrigerating / dehumidifying device 1 is installed from being accumulated due to the fall of the dew condensation and preventing the floor surface from being soiled.

Further, in this embodiment, the precooling pipe 18 and the reheating pipe 2 are provided.
In the pre-cooling / reheating chamber 2 where
The outside air was blown to the pre-cooling pipe 18 and the reheating pipe 22 by the fan 31. Therefore, the dehumidified air in the reheat pipe 22 is heated by both the precooling pipe 18, the high temperature humid air, and the outside air, and the temperature of the dehumidified air can be efficiently raised to a temperature close to the outside air.

Furthermore, since a large number of fins 30 are provided on the pre-cooling pipe 18 and the reheating pipe 22, the heat of the outside air is efficiently transferred to the reheating pipe 22.
It is transmitted to the dehumidified air inside. Therefore, the temperature of the dehumidified air can be raised more efficiently to the outside air temperature.

The present invention is not limited to the above-mentioned embodiment, but can be embodied with the following modifications. (1) As shown in FIG.
The fan 31 and the second fan drive motor 32 may be installed and the second fan 31 may blow the outside air to the air extraction pipe 23. Further, the air extraction pipe 23 may be provided with a large number of fins 30. In this case, the temperature of the dehumidified air is raised in the air extraction pipe 23 to a temperature close to the outside air temperature. Therefore, it is possible to prevent the occurrence of dew condensation on the air extraction pipe 23.

(2) In this embodiment, air is dehumidified,
Alternatively, helium gas or the like may be dehumidified. (3) In this embodiment, a large number of fins 30 are provided on the precooling pipe 18 and the reheating pipe 22, but the fins 30 may be omitted. Also in this case, it is possible to prevent the occurrence of dew condensation on the air extraction pipe 23.

(4) In this embodiment, the outside air temperature is about 33 ° C.
Although the case where the high temperature moist air is about 35 ° C. has been described above, it is possible to prevent dew condensation from occurring in the air extraction pipe 23 even when the outside air temperature and the temperature of the high temperature moist air are other temperatures. That is, since the dehumidified air is heated by the outside air, the temperature of the dehumidified air can be raised to near the outside air temperature even if the outside air temperature changes.

(5) The side wall forming the precooling / reheating chamber 2 may be omitted. Next, technical ideas other than the claims that can be understood from the above embodiments will be described below along with their effects.

(1) The refrigeration dehumidifier according to claim 1, wherein the take-out pipe is provided with a large number of heat absorbing plates.
In this case, the temperature of the dehumidified air can be efficiently raised to a temperature close to the outside air temperature.

In the present specification, the fluid to be dehumidified includes not only air but also other gases such as helium gas.

[0041]

As described in detail above, according to the present invention, it is possible to prevent the occurrence of dew condensation on the take-out pipe.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a refrigerating type dehumidifying device of this embodiment.

FIG. 2 is a configuration diagram showing another example of a refrigerating type dehumidifying device.

[Explanation of symbols]

3 ... Cooling chamber, 5 ... Compressor, 9 ... Condenser, 17
... Air supply pipe as delivery pipe, 18 ... Pre-cooling pipe as pre-cooling / re-heating unit, 22 ... Re-heating pipe as pre-cooling / re-heating unit, 23
... An air extraction tube as an extraction tube, 31 ... A second fan as a blower.

Claims (3)

[Claims] 1. A compressor (5) for compressing a refrigerant gas, a condenser (9) for cooling the compressed refrigerant gas sent from the compressor (5) to condense it into a liquid refrigerant, and a condenser (9). )
Heat exchanger (14) for evaporating the liquid refrigerant sent from the
In a refrigeration circuit (R) for cooling and dehumidifying a fluid to be dehumidified by the heat exchanger (14), a cooling chamber (C) in which the interior of the refrigeration dehumidifier is cooled by the heat exchanger (14). 3) is provided, and the delivery pipes (17, 18) for delivering the dehumidified fluid to the cooling chamber (3) are connected to the ejection pipes (22, 23) for taking out the dehumidified fluid, and the ejection pipes (22, 23) are provided.
A refrigerating type dehumidifier having a blower (31) for blowing outside air. 2. The freezing-type dehumidifying device according to claim 1, wherein the delivery pipes (17, 18) and the extraction pipes (22, 23) are provided with pre-cooling / reheating parts (18, 22) which are in contact with each other. A refrigeration-type dehumidifier having a blower (31) for blowing the outside air to the pre-cooling / reheating section (18, 22). 3. The refrigeration-type dehumidifier according to claim 2, wherein the pre-cooling / reheating section (18, 22) has a large number of heat absorbing plates (3).
0) The refrigerating type dehumidifier provided with.