JP2019055348A - Drain discharge circuit device - Google Patents

Abstract

To provide a drain discharge circuit device which efficiently flows down a drain liquid received in a drain receiving tank and can further improve discharge efficiency of the drain liquid.SOLUTION: A drain discharge circuit device includes: a drain discharge flow channel 30 which communicates with a drain outlet 22 provided on a bottom part 21 of a drain receiving tank 20 and guides the drain liquid 11 to the lower part and discharges the drain liquid; a drain opening/closing valve 40 which opens/closes the drain discharge flow channel 30; and a pressure gas vent pipe conduit 50 which has a one end port 51 arranged on a gas space part 25 and has the other end port 52 arranged on the pressure gas accumulation part 35, so as to communicate between a gas space part 25 of the drain receiving tank 20 and a pressure gas accumulation part 35 of the drain discharge flow channel 30 and to release the pressure gas of the pressure gas accumulation part 35, where the one end port 51 of the pressure gas vent pipe conduit 50 is provided on an opening having such a shape that a cylindrical pipe is obliquely cut.SELECTED DRAWING: Figure 1

Description

  The present invention includes a bottom portion that receives drain liquid, and a drain receiving tank that serves as a gas space above the drain surface of the drain liquid received at the bottom section, and a drain outlet that is opened at the bottom section of the drain receiving tank. A drain discharge passage that is provided as a flow path that communicates downward, guides and discharges the drain liquid downward, and a valve that opens and closes the drain discharge flow path, and opens the drain liquid when opened. A discharge on-off valve is provided in a pipe shape so as to vent the pressurized gas in the pressurized gas reservoir by communicating between the gas space and the pressurized gas reservoir generated in the middle of the drain discharge channel, The present invention relates to a drain discharge circuit device provided with a pressurized gas vent pipe line in which one end port is arranged in the gas space part and the other end port is arranged in the pressurized gas reservoir part.

  Conventionally, as a drain discharge circuit device, for example, a dew receiving container that is disposed below a heat exchanger of an indoor unit in an air conditioner and receives dew condensation water flowing down from the heat exchanger, It has a drain pipe called drain hose connected to the drain outlet of the receiving container, and an air vent pipe. The drain pipe extends to the outside through the rear part of the indoor unit. In addition, if the diameter of the drainage port is small, the inlet of the drainage port is blocked by the surface tension of the water, and an air layer is formed at the lower part of the drainage port, so that the water in the dew receiving container becomes more difficult to flow down, In the end, water leakage due to overflow will occur, but to prevent this, the air vent pipe is provided with an air vent pipe to vent air from the air layer (patented) Document 1 reference) have been proposed.

  In addition, as a device in which the drain discharge circuit device is used, for example, the heat exchanger has a first heat exchanger so that the primary compressed air is dehumidified by heat exchange and the dehumidified secondary compressed air is discharged. It is provided in two stages, a heat exchanger part and a second heat exchanger part, the second heat exchanger part is disposed below the first heat exchanger part, and the second heat exchanger part A first small chamber in which an air outlet is opened and an inlet of a reheating channel is opened, an outlet of a reheating channel is opened, and a discharge port for discharging compressed air on the secondary side is opened. A water separation means for separating water by bending the flow of compressed air inside the second chamber and between the outlet and the outlet of the reheat channel. A compressed air dehumidifier (see Patent Document 2) is disclosed by the present applicant.

  In addition, although the drainage device of the prior art air conditioner described in Patent Literature 1 includes an air vent pipe (pressure gas vent pipe), the drain liquid is discharged by opening and closing the drain discharge passage. It does not correspond to the drain discharge circuit device to which the drain discharge on-off valve is connected. In other words, the air conditioner drain device described in Patent Document 1 always opens the drain discharge flow path to the atmosphere.

  In addition, the pipe of the air vent pipe (pressure gas vent pipe) is a pipe provided corresponding to the drain discharge passage pipe for its arrangement and connection, and is narrower than the drain discharge passage pipe. Although it is often configured by piping, it is necessary to prevent clogging and properly maintain the opening for ventilation in order to smoothly extract the pressurized gas.

Japanese Utility Model Publication No. 05-25215 (first page) JP 2012-130897 A (first page)

  The problem to be solved with respect to the drain discharge circuit device is that the drain liquid in the drain receiving tank is efficiently used when a drain discharge on / off valve that discharges the drain liquid by opening and closing the drain discharge channel is connected. A configuration for making it flow down well and further improving the drainage efficiency of the drain liquid is that no proposal has been made.

  Therefore, an object of the present invention is to provide a drain discharge circuit device that can efficiently drain the drain liquid received in the drain receiving tank and further increase the drain liquid discharge efficiency.

The present invention has the following configuration in order to achieve the above object.
According to one aspect of the drain discharge circuit device of the present invention, a drain receiving tank is provided that includes a bottom portion that receives drain liquid, and a liquid surface upper side of the drain liquid received by the bottom portion serves as a gas space portion, and the drain receiver. A drain discharge channel that is provided as a channel that communicates downward with a drain outlet that is opened at the bottom of the tank, and that guides and drains the drain liquid downward; and a valve that opens and closes the drain discharge channel. A drain discharge on-off valve that discharges the drain liquid when opened, and a pressurized gas in the pressurized gas reservoir portion that communicates between the gas space portion and a pressurized gas reservoir portion that is formed in the middle portion of the drain discharge flow path. Is provided in a pipe shape so as to be drawn out to the gas space portion, and is provided with a pressurized gas vent pipe passage having one end port arranged in the gas space portion and the other end port arranged in the pressurized gas reservoir portion. In the discharge circuit device, the pressure One end opening of the body discharge duct is provided in the opening having a shape cut cylindrical pipe obliquely.

  Moreover, according to one form of the drain discharge circuit apparatus which concerns on this invention, the opening of the said one end opening of the said pressurized gas vent pipe line is installed facing the side which does not receive the flow of the gas in the said drain receiving tank. It can be characterized by being.

Moreover, according to one form of the drain discharge circuit apparatus which concerns on this invention, the said drain receiving tank is provided with the heat exchanger, and the gas which receives the drain liquid which arises when the vapor | steam contained in gas is cooled and condensed is formed. It can be characterized by being a liquid separation tank.
Moreover, according to one aspect of the drain discharge circuit device according to the present invention, the drain liquid is drain water generated by condensation of water vapor in the compressed air, and is provided in the compressed air dehumidifier. Can do.

Further, according to one aspect of the drain discharge circuit device of the present invention, the pressurized gas vent pipe is provided by a pressurized gas vent tube having an outer diameter smaller than the inner diameter of the drain discharge pipe constituting the drain discharge channel. The pressurized gas vent tube is inserted into the drain discharge pipe, the other end port is disposed in the drain discharge pipe, and the one end port is disposed in a state protruding from the drain discharge channel to the gas space. It can be characterized by being.
Moreover, according to one form of the drain discharge circuit apparatus which concerns on this invention, the said other end port of the said pressurized gas vent tube is installed so that it may open upwards in the said drain discharge piping, It is characterized by the above-mentioned. Can do.

Moreover, according to one form of the drain discharge circuit apparatus which concerns on this invention, the said drain discharge flow path is equipped with the pipe joint connected to the said drain outlet, and the said drain discharge piping connected to this pipe joint. A press-fit base is provided in the lower part so as to be fixed by being inserted in a press-fitted state inside the passage of the pipe joint, and a tube holding part is provided in the upper part to hold the pressurized gas vent tube. The compressed gas venting tube may be installed by the tube fixing metal fitting.
Moreover, according to one form of the drain discharge circuit apparatus which concerns on this invention, it is a middle part to the said drain discharge on-off valve of the said drain discharge flow path, Comprising: The said drain is more than the said other end port of the said pressurized gas vent line. A drain tank as a part for expanding the flow path may be connected so that the drain liquid can be stored on the side of the discharge opening / closing valve.

  According to the drain discharge circuit device according to the present invention, the drain liquid received in the drain receiving tank can be efficiently flowed down, and the drain liquid discharge efficiency can be further enhanced.

It is sectional drawing which shows typically the example of the form of the drain discharge circuit apparatus which concerns on this invention. It is sectional drawing which shows typically the other example of a drain discharge circuit apparatus which concerns on this invention. It is sectional drawing which shows the detail of the example of the one end port of the pressurized gas vent pipe line which concerns on this invention. It is sectional drawing which shows typically the example of a form of the compressed air dehumidification apparatus provided with the drain discharge circuit apparatus which concerns on this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a drain discharge circuit device according to the present invention will be described in detail with reference to the accompanying drawings (FIGS. 1 and 2). Although the drain discharge circuit device of this embodiment is used for a compressed air dehumidifier, the drain discharge circuit device according to the present invention condenses moisture in the air even in an air device that handles vacuum, for example. Draining of drain liquid, such as those that discharge as drain water, and gas devices that discharge gases other than air that exist as vapor in the gas and that have condensed and become liquid (drain liquid) The present invention can be applied to various devices appropriately managed by the discharge on / off valve. In the following, a drain discharge circuit device provided in the compressed air dehumidifier will be described mainly where the drain liquid is drain water generated by condensation of water vapor in the compressed air.

  A drain receiving tank 20 includes a bottom 21 that receives the drain liquid 11, and the upper surface of the drain liquid 11 received by the bottom 21 is provided to be a gas space 25. As an example of the drain receiving tank 20, there is a gas-liquid separation tank 20 </ b> A that is provided by the outer shell of the heat exchanger 12 and receives the drain liquid 11 generated when the vapor contained in the gas is cooled and condensed. Further, as an example of the gas-liquid separation tank 20A, the gas-liquid separation tank 20A is provided by the outer shell of the heat exchanger 12 constituting the compressed air dehumidifier (see FIG. 4), and maintains a pressure higher than the atmospheric pressure. There are some which are provided in the shape of a pressure vessel and receive drain water 11A generated by condensation of water vapor in compressed air at the bottom.

  Reference numeral 30 denotes a drain discharge channel, which is provided as a channel communicating downward with a drain outlet 22 opened in the bottom 21 of the drain receiving tank 20, and is provided so as to guide and drain the drain liquid 11 downward. Yes. The drain discharge channel 30 of the present embodiment includes a passage by a pipe joint 31 connected to the drain outlet 22, a passage by a drain discharge pipe 32 connected to the pipe joint 31, a drain tank 60 and a drain discharge on / off valve 40 which will be described later. It is comprised by the path | pass by the solenoid valve which is these, and finally it guide | induces and discharges the drain liquid 11 (drain water 11A) below through the bending flow path part, horizontal flow path part, etc. which comprise those paths. It is provided to let you.

  A drain discharge on / off valve 40 is a valve that opens and closes the drain discharge flow path 30, and discharges the drain liquid 11 when opened. In the present embodiment, the drain discharge on / off valve 40 is constituted by an electromagnetic valve, and the opening / closing operation is automatically performed according to a command from the electronic control unit 45 so that the drain outflow passage is opened at a required time interval.

  The open time length that is the discharge time and the close time length that is the interval in the solenoid valve of the present embodiment are as follows in the case of the compressed air dehumidifier 10 that is operated for air as shown in FIG. The temperature can be adjusted as appropriate according to the temperature and humidity of the outside air (air) taken into the apparatus and other conditions. For example, as an example of the opening / closing time of the drain discharge opening / closing valve 40, the closing time is set to 15 to 60 seconds and the opening time is set to 1 to 5 seconds. In the liquid separation tank 20A, since the pressure is higher than the atmospheric pressure, the drain liquid 11 (drain water 11A) is discharged by the pressure so as to be pushed out to the outside in a short time of opening.

  The opening and closing of the drain discharge on / off valve 40 is not limited to this. For example, a float is floated in the drain tank 60, and the drain discharge on / off valve 40 is directly opened and closed by the operation of the float. Alternatively, when the drain discharge on-off valve 40 is a solenoid valve, it is also possible to perform the electronic control using a float as a drain liquid amount detector. In this embodiment, the outlet of the drain discharge on / off valve 40 is a drain discharge port 41 that is the final outlet of the drain liquid 11.

  Reference numeral 50 denotes a pressurized gas vent pipe, which communicates between the gas space 25 and the pressurized gas reservoir 35 generated in the middle of the drain discharge flow path 30 to transfer the pressurized gas in the pressurized gas reservoir 35 to the gas space. It is provided in a pipe shape so as to be pulled out to the portion 25, and one end 51 is arranged in the gas space 25 and the other end 52 is arranged in the pressurized gas reservoir 35.

  According to this, since the pressure of the pressurized gas reservoir 35 may become larger than the pressure of the gas space 25 in the gas-liquid separation tank 20A, the drain liquid 11 in the gas-liquid separation tank 20A cannot flow down. However, since the pressure difference between the pressurized gas reservoir 35 and the gas space 25 by the pressurized gas vent pipe 50 is eliminated and the pressure can be equalized, the flow of the drain liquid 11 can be secured. The drain liquid 11 can be discharged efficiently and smoothly. That is, the pressurized gas vent pipe 50 is a pressure equalizing thin tube, and the pressure of the gas space 25 and the pressurized gas reservoir 35 are set equal to each other so that the drain liquid 11 can flow down by gravity.

  In the drain circuit, the location where the pressurized gas reservoir 35 (the part called “air reservoir” or “air lock” when the gas is air) is generated) is the portion where the drain discharge flow path 30 is raised. The drain discharge channel 30 has many such portions, and air lock is likely to occur. In the present embodiment, the drain discharge flow path 30 includes a 90 ° elbow-shaped pipe joint 31 having a shape that bends the flow path at right angles and a drain discharge pipe 32 that guides the drain liquid 11 in the horizontal direction for piping. The portion is a portion that tends to become a pressurized gas reservoir 35 (air reservoir).

  In the drain discharge circuit device according to the present invention shown in FIGS. 1 and 2, the target gas is air, and the pressurized gas vent line 50 is an air vent tube 50A. That is, the vapor contained in the gas is water vapor, and the drain liquid 11 is the drain water 11A. The drain water 11A is, for example, generated by condensation / condensation of water vapor by cooling air that is compressed and heated in a pneumatic device such as a compressor and containing a large amount of water vapor. In this way, in the drain circuit for air, by providing the air vent tube 50A, it is possible to prevent the air 11A from being retained by draining the air from the air reservoir 35A. That is, an air vent tube 50A can be provided at the bottom 21 of the gas-liquid separation tank 20A to positively vent the air and eliminate the air lock.

  A drain tank 60 stores the drain liquid 11 in the middle of the drain discharge passage 30 up to the drain discharge on / off valve 40 on the side of the drain discharge on / off valve 40 from the other end 52 of the pressurized gas vent line 50. It is connected as a part which expands a channel so that it can do.

  By providing the drain tank 60 in this way, the drain discharge flow path 30 can increase the capacity for storing the drain liquid 11, so that the drain liquid 11 easily flows through the drain discharge flow path 30. The generation of the pressurized gas reservoir 35 having a pressure higher than the pressure of the drain receiving tank 20 in the drain discharge channel 30 can be suppressed. Therefore, according to this invention, the drain liquid 11 received by the drain receiving tank 20 can be efficiently flowed down, and the discharge efficiency of the drain liquid 11 can be improved more.

  According to this, for example, in the case of using the compressed air dehumidifier 10 as shown in FIG. 4, the drain water 11A is made to exist in the vicinity of the air vent tube 50A by having the drain water 11A stored in the drain tank 60. Therefore, the drain discharge pipe 32 can be prevented from being clogged. According to this, since the drain liquid 11 (drain water 11A) in the drain receiving tank 20 (gas-liquid separation tank 20A) can be efficiently flowed down, the drain water 11A is drawn into the compressed air and returned. Since the efficiency of heat exchange in the gas-liquid separation tank 20A can be increased, dehumidification efficiency can be increased.

  Further, the drain tank 60 makes it possible to extend the time for closing the drain discharge on / off valve 40 and to store a larger amount of the drain liquid 11, and thus to store the larger amount of the drain liquid 11. Can be discharged at a stretch by opening the drain discharge on-off valve 40 for a shorter period of time, so that efficient operation can be performed. Furthermore, by providing the drain tank 60 in the vicinity of the drain discharge on / off valve 40, it becomes possible to speed up the drainage responsiveness, so that an efficient operation can also be performed.

  And the one end port 51 of the pressurized gas vent pipe 50 is provided in the opening of the shape which cut the cylindrical pipe diagonally. In this embodiment, the opening surface of the one end 51 of the air vent tube 50A (pressure gas vent pipe 50) is a surface obtained by cutting the tube obliquely with respect to the tube center axis 53 (see FIG. 3), and air passes therethrough. The opening area is increased.

  According to this, the flowability of the air vent tube 50A (the pressurized gas vent pipe line 50) is improved, and the generation of the air lock (the pressurized gas reservoir 35) can be better prevented. Therefore, according to this invention, the drain liquid 11 received by the drain receiving tank 20 can be efficiently flowed down, and the discharge efficiency of the drain liquid 11 can be improved more.

  Further, in this embodiment, the opening of the one end port 51 of the pressurized gas vent line 50 (air vent tube 50A) is a gas flow (air) S (circulation) in the drain receiving tank 20 (gas-liquid separation tank 20A). (See the arrow in FIG. 1). By reversing the opening surface from the flow S of the gas (air) in this way, an object that may cause clogging such as foreign matter or drain water 11A (water droplet-like condensed water separated from the gas phase) is compressed gas. It is possible to prevent the air from flowing into the vent pipe 50 (air vent tube 50A).

  According to this, the flowability of the air vent tube 50A (the pressurized gas vent pipe line 50) is improved, and the generation of the air lock (the pressurized gas reservoir 35) can be better prevented. Therefore, according to this invention, the drain liquid 11 received by the drain receiving tank 20 can be efficiently flowed down, and the discharge efficiency of the drain liquid 11 can be improved more.

  In this embodiment, the pressurized gas vent pipe 50 is provided by a pressurized gas vent tube (air vent tube 50A) having an outer diameter smaller than the inner diameter of the drain discharge pipe 32 constituting the drain discharge channel 30. A pressurized gas vent tube (air vent tube 50 </ b> A) is inserted into the drain discharge pipe 32, the other end port 52 is arranged in the drain discharge pipe 32, and one end port 51 protrudes from the drain discharge channel 30 to the gas space 25. It is arranged in the state.

  According to this, as shown in FIG. 1, the drain discharge circuit device according to the present invention can be applied to existing equipment and can be easily installed, and the pressure equalizing port is newly provided. Since it is not necessary to provide, cost can be reduced. For example, it can be easily installed later on an existing compressed air dehumidifier as shown in FIG. For example, in the embodiment shown in FIG. 1, the outer diameter of the air vent tube 50A is set to 4 mm, and the inner diameter of the drain discharge pipe 32 is set to 9 mm. By setting the inner diameter of the drain discharge pipe 32 to be twice or more the outer diameter of the tube 50A, both the drain liquid 11 and the air vent can ensure a smooth flow.

In the present embodiment, the other end 52 of the pressurized gas vent tube (air vent tube 50 </ b> A) is installed so as to open upward in the drain discharge pipe 32.
According to this, it is possible to prevent the other end port 52 of the pressurized gas vent tube (air vent tube 50A) from being immersed in the drain liquid 11, and it is easy to ensure proper ventilation of the pressurized gas (air). Venting (air venting) can be performed more reliably.

  Furthermore, in this embodiment, the drain discharge flow path 30 is provided by including a pipe joint 31 connected to the drain outlet 22 and a drain discharge pipe 32 connected to the pipe joint 31, and the pipe joint 31. The inner diameter of the passage interior 31a connected to the drain outlet 22 is larger than the inner diameter of the drain discharge pipe 32, and is press-fitted so as to be fixed by being inserted into the passage interior 31a of the pipe joint 31 in the press-fit state at the lower part. A pressurized gas venting tube (air venting tube 50A) is installed by a tube fixing bracket 70 provided with a base 71 and having a tube holding part 72 provided on the upper part so as to hold the pressurized gas venting tube (air venting tube 50A). ing.

  As shown in FIG. 1, the tube fixing bracket 70 of this embodiment is a tube presser that holds a pressurized gas release tube (in this embodiment, the air release tube 50 </ b> A) and fixes it to the pipe joint 31. The bent portion 71a is fixed in a state of being engaged with the passage interior 31a of the pipe joint 31 in a press-fitted state using the spring property of the bent portion 71a. In addition, the tube holding portion 72 of this embodiment is provided in a form that holds the air vent tube 50A by caulking in which a metal material is plastically deformed. In addition, the method of fixing and holding (the fixing method for the pipe joint 31 and the holding method for the pressurized gas venting tube (air venting tube 50A)) relating to the pressurized gas venting tube of the present invention is the method using the tube fixing fitting 70 of this embodiment. Of course, a known fixing method can be selectively used as appropriate.

  According to this tube fixing metal fitting 70, the pressurized gas venting tube (air venting tube 50A) can be properly arranged at a required position, and the drop-off can be prevented appropriately. Moreover, according to this tube fixing metal fitting 70, it is the structure which incorporates a pressurized gas vent tube (air vent tube 50A) by retrofit with respect to the pipe joint 31 and the drain discharge piping 32 provided in the existing apparatus equipment. Since it is not necessary to provide a new pressure equalizing port, the cost can be reduced and the pressure equalizing port can be easily installed.

  The present invention is not limited to the embodiment shown in FIG. 1, and as shown in FIG. 2, the pressurized gas vent pipe 50 is routed from the pipe joint 36 to the outside, and the drain discharge pipe 32 is disposed in the middle. It is good also as a form which connects and communicates. Even in this case, the pipe joint 36 has a special form, but it is not necessary to newly provide a pressure equalizing port in the drain receiving tank 20 (gas-liquid separation tank 20A), and it can be retrofitted and has the same effect as the embodiment of FIG. In addition, the inner surface effective cross-sectional area of the drain discharge pipe 32 is increased, and it is possible to obtain an effect that air is not easily accumulated.

  In addition, with respect to the tube fixing fitting 70, the flow of gas (air) flowing through the drain receiving tank 20 (gas-liquid separation tank 20A) through the opening of the one end 51 of the pressurized gas vent line 50 (air vent tube 50A). In order not to directly receive S (see the arrow in FIG. 1), a shielding part that blocks the flow of gas (air) in the vicinity of the opening of the one end 51 is used as the tube holding part 72 in the embodiment of FIG. You may provide in the shape which continues upwards from. This also prevents an object that may cause clogging such as foreign matter and drain water 11A (water droplet-like condensed water separated from the gas phase) from flowing into the pressurized gas vent line 50 (air vent tube 50A). be able to.

  Furthermore, in this embodiment, both ends of the air vent tube 50A are held in a cantilever state by the tube fixing bracket 70, and the air vent tube 50A of this embodiment is made of resin and has elasticity and is pressurized gas. A tube made of a material that easily vibrates with the flow S can be used. When the air vent tube 50A is vibrated appropriately, the air vent tube 50A can be shaken off so that the drain water 11A does not adhere to the air vent tube 50A. By oscillating in the flow path 30, it is possible to improve drainage performance such as preventing the generation of surface tension so that the pressurized gas reservoir 35 cannot be formed.

  Further, the drain water 11A according to the present embodiment is generated, for example, by a dehumidifying action of compressed air, but is not limited thereto, and is also generated by a dehumidifying action under atmospheric pressure or reduced pressure vacuum. For example, even under vacuum decompression, the height from the drain outlet 22 of the gas-liquid separation tank 20A to the drain outlet 41 which is the final outlet to the outside of the drain water 11A and is located below is sufficiently long. When the water head is sufficient, the drain water 11A can be drained by opening it by gravity when the water head of the drain water 11A is accumulated to be larger than a predetermined value as a drain discharge on / off valve, so that the outside air is not taken in. One can use a check valve that always operates to close.

  Further, as the compressed air dehumidifying device 10 in which the drain discharge circuit device according to the present invention is used, for example, as shown in FIG. 4, the primary compressed air introduced from the compressing device through the air inlet 15 is dehumidified by heat exchange. So that the dehumidified secondary compressed air is discharged to the pneumatic equipment through the air outlet 16, and the heat exchanger 12 is connected to the first heat exchanger section 12a and the second heat exchanger section 12b. A cooling flow associated with the compressed air on the primary side so that the first heat exchanger section 12a pre-cools the compressed air on the primary side and reheats the compressed air on the secondary side. The second heat exchanger section 12b is pre-cooled by the first heat exchanger section 12a. The second heat exchanger section 12b is precooled by the first heat exchanger section 12a. Compressed air is cooled by a cooling device And by causing condensation arranged to dehumidify by being introduced at a cooling medium to be returned from the refrigerant outlet 18 from 7.

The drain water 11A in the compressed air dehumidifier 10 flows down to the bottom 21 of the gas-liquid separation tank 20A constituting the outer shell of the second heat exchanger section 12b, and from a drain outlet 22 that opens downward to the bottom 21. Discharged. A drain discharge circuit device according to the present invention can be configured by connecting the drain discharge channel 30 according to the present invention to the drain outlet 22.
According to the compressed air dehumidifying device 10 provided with the drain discharge circuit device in this way, as described above, the drain water 11A in the drain receiving tank 20 (gas-liquid separation tank 20A) is allowed to flow down efficiently, and the drain water 11A. Therefore, the dehumidification efficiency of the compressed air dehumidifier 10 can be further increased.

  As described above, the present invention has been described in various ways with preferred embodiments. However, the present invention is not limited to these embodiments, and many modifications can be made without departing from the spirit of the invention. That is.

DESCRIPTION OF SYMBOLS 10 Compressed air dehumidifier 11 Drain liquid 11A Drain water 12 Heat exchanger 12a 1st heat exchanger part 12b 2nd heat exchanger part 15 Air inlet 16 Air outlet 17 Refrigerant inlet 18 Refrigerant outlet 20 Drain receiving tank 20A Gas liquid Separation tank 21 Bottom 22 Drain outlet 25 Gas space 30 Drain discharge flow path 31 Fitting 31a Inside passage 32 Drain discharge piping 35 Pressure gas reservoir 35A Air reservoir 36 Fitting 40 Drain discharge on-off valve 41 Drain discharge port 45 Electronic control Device 50 Pressurized gas vent line 50A Air vent tube 51 One end port 52 Other end port 53 Tube center axis 60 Drain tank 70 Tube fixing bracket 71 Press fit base 71a Bent portion 72 Tube holding portion

Claims (8)

A drain receiving tank having a bottom for receiving the drain liquid, the liquid surface upper side of the drain liquid received at the bottom being a gas space;
A drain discharge flow path provided as a flow path communicating downward with a drain outlet opened at the bottom of the drain receiving tank, for guiding the drain liquid downward and discharging;
A valve that opens and closes the drain discharge flow path, and that opens and discharges the drain liquid; and
It is provided in a pipe shape so as to communicate between the gas space and a pressurized gas reservoir generated in the middle of the drain discharge flow path and draw the pressurized gas in the pressurized gas reservoir to the gas space. In the drain discharge circuit device comprising one end port in the gas space portion and a pressurized gas vent line in which the other end port is disposed in the pressurized gas reservoir,
The drain discharge circuit device according to claim 1, wherein the one end port of the pressurized gas vent pipe is provided in an opening having a shape obtained by obliquely cutting a cylindrical pipe.   The drain discharge circuit device according to claim 1, wherein the opening of the one end port of the pressurized gas vent pipe is installed so as to face a side not receiving the gas flow in the drain receiving tank.   3. The gas-liquid separation tank according to claim 1, wherein the drain receiving tank is a gas-liquid separation tank that is provided by a heat exchanger and receives drain liquid generated by cooling and condensation of vapor contained in the gas. Drain discharge circuit device.   4. The drain discharge circuit device according to claim 3, wherein the drain liquid is drain water generated by condensation of water vapor in compressed air, and is provided in a compressed air dehumidifier.   The pressurized gas vent pipe is provided by a pressurized gas vent tube having an outer diameter smaller than the inner diameter of the drain discharge pipe constituting the drain discharge flow path, and the pressurized gas vent tube is inserted into the drain discharge pipe and The other end port is arranged in the drain discharge pipe, and the one end port is arranged in a state protruding from the drain discharge channel to the gas space part. The drain discharge circuit device described.   6. The drain discharge circuit device according to claim 5, wherein the other end of the pressurized gas vent tube is installed so as to open upward in the drain discharge pipe. The drain discharge flow path is provided by including a pipe joint connected to the drain outlet, and the drain discharge pipe connected to the pipe joint,
A tube fixing bracket provided with a press-fit base at a lower portion so as to be fixed by being inserted in a press-fit state inside the passage of the pipe joint, and a tube holding portion provided at an upper portion to hold the pressurized gas vent tube The drain discharge circuit device according to claim 5 or 6, wherein the pressurized gas vent tube is installed.   In the middle of the drain discharge flow path to the drain discharge on-off valve, so that the drain liquid can be stored on the side of the drain discharge on-off valve rather than the other end port of the pressurized gas vent line, The drain discharge circuit device according to any one of claims 1 to 7, wherein a drain tank as a portion for expanding the flow path is connected.

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