JP3134435B2 - Refrigerator water removal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water removing device for removing water from a refrigerant in a refrigerating device used for an air conditioner or the like.

[0002]

2. Description of the Related Art For example, in a car air conditioner, rubber hoses are inevitably used for absorbing vibrations and the like, and moisture easily enters into a refrigerant through these rubber hoses. When moisture is mixed in the refrigerant, corrosion of metal parts and deterioration of cooling performance are caused.

Therefore, for example, Japanese Patent Application Laid-Open No. 59-157462.
In the publication, a bypass passage is connected to a main refrigerant circulation passage of a refrigeration circuit, and the refrigerant is cooled by a cold trap using liquid nitrogen in the bypass passage, and water in the refrigerant is frozen to remove water. I have to.

Further, in the application of Japanese Patent Application No. 3-82675, a bypass passage is provided in a portion of an expansion valve or a portion of an evaporation pressure regulating valve for preventing frost of an evaporator, and a refrigerant temperature caused by adiabatic expansion is provided. Take advantage of the decline
A technique for separating and removing moisture in a bypass passage has been proposed.

[0005]

However, lubricating oil is circulated in the refrigeration circuit together with the refrigerant, but the lubricating oil may reduce the water removing function.

For example, in Japanese Patent Application No. 3-82675, a refrigerant whose temperature has been reduced by adiabatic expansion is passed through a cylinder.
There are disclosed an example in which the bypassed refrigerant is cooled by passing through a spiral passage on the outer peripheral surface of the cylinder, and an example in which the bypassed refrigerant is adiabatically expanded to lower the temperature. In these cases, in the former example, the film of the lubricating oil adheres to the inner surface of the spiral passage, resulting in a decrease in cooling capacity. Further, in the latter example, since the filter for collecting the separated moisture is disposed across the bypass passage, if the bypass flow contains a large amount of lubricating oil, the lubricating oil collects the lubricating oil. The water is dissolved, and the water is again contained in the refrigerant.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to suppress a decrease in the function of a water removing device due to lubricating oil, and to provide a water which always exhibits a good water removing function. An object of the present invention is to provide a removing device.

[0008]

According to a first aspect of the present invention, an evaporator, an expansion valve,
A refrigerant bypass passage is connected to a part of a refrigerant main circulation passage of a refrigeration circuit including a compressor, a condenser, and a receiver, and a dehumidifying unit is provided in the bypass passage. In the refrigerating apparatus configured such that the moisture in the refrigerant is separated and removed by the dehumidifying means and the refrigerant after the moisture removal returns to the refrigerant main circulation passage, the refrigerant bypass passage branches from the refrigerant main circulation passage. the part content provided lubricating oil removal means for separating and removing the lubricating oil in the refrigerant, prior to the lubricating oil removal means
A predetermined gap is formed with respect to the inner peripheral surface of the refrigerant main circulation passage.
It is characterized by comprising a conduit to be obtained .

In the second invention, the lubricating oil removing means is provided at a portion where the refrigerant bypass passage branches off from the refrigerant main circulation passage, and generates a branch flow having a flow velocity lower than the refrigerant flow velocity in the refrigerant main circulation passage. It is configured to be. Further, in the third invention, the evaporator, the expansion
Cooling including expansion valve, compressor, condenser and receiver
A refrigerant bypass passage is connected to a part of the refrigerant main circulation passage of the freezing circuit.
A dehumidifier is provided in the bypass passage to cool
Part of the refrigerant flowing in the medium main circulation passage is a refrigerant bypass passage.
Is introduced into the inside and the moisture in the refrigerant is separated and removed by the dehumidifying means.
So that the refrigerant from which moisture has been removed returns to the refrigerant main circulation passage.
In the refrigerant bypass passage,
Has a lubricant removing means for separating and removing the lubricant in the refrigerant.
And passing the lubricating oil removing means through the refrigerant bypass passage.
Arranged so that the bypass flow of passing refrigerant can meander
It is characterized by comprising a barrier.

[0010]

According to the first aspect of the present invention, the branch flow of the refrigerant is cooled in the bypass passage to separate and remove the water.
The refrigerant undergoes a lubricating oil removing action before cooling. For this reason, moisture removal is performed efficiently.

In the second invention, a high-mass refrigerant containing a large amount of lubricating oil flows at a high speed in the main refrigerant circulation passage, while a low-mass refrigerant containing only a small amount of lubricating oil is divided. It reaches the inside of the bypass passage. Further, according to the third invention,
If the refrigerant passing through the bypass passage hits the barrier
Thereby, the lubricating oil removing action is given to the refrigerant.

[0012]

First Embodiment A first embodiment in which the present invention is embodied in a car air conditioner will be described below with reference to FIGS.
In the first embodiment, the present invention is embodied in an expansion valve.

FIG. 1 is a diagram showing a schematic configuration of a car air conditioner according to a first embodiment. The car air conditioner includes an evaporator 1, a box type expansion valve 2 (see FIG. 2), a variable capacity compressor 3, a condenser 4, and a receiver 5. The refrigeration circuit surrounding these constitutes a refrigerant main circulation passage. Main body block 6 of the box type expansion valve 2
A valve chamber 7 is formed on one side (left side in the figure).
Communicates with the first refrigerant passage 8. Also, body block 6
A circular concave portion 9 is formed in the upper part of the figure, and a second refrigerant passage 10 extends from the bottom surface. This second refrigerant passage 10
Is in communication with the valve chamber 7 through an expansion orifice 11. A valve seat 12 is formed in the expansion orifice 11.

The valve element 14 is arranged to face the valve seat 12,
It is fixedly supported by the valve catch 13. A compression coil spring 17 is interposed between the spring receiver 15 and the valve receiver 13,
4 is urged by a compression coil spring 17 in a direction to close the expansion orifice 11.

On the other side (right side in FIG. 1) of the main body block 6, third refrigerant passages 18 are arranged vertically. A screw hole 19 is formed near the third refrigerant passage 18, and the screw hole 19 communicates with the third refrigerant passage 18 through a plunger hole 20. A plunger hole 21 is formed corresponding to the plunger hole 20, and the plunger hole 21 and the second refrigerant passage 10 are connected by a rod hole 22.

The opening adjusting member 23 includes an inner housing 24,
An outer housing 26 and a plunger (temperature sensing rod) 27 are provided. The rod 28 of the plunger 27 is exposed inside the third refrigerant passage 18. The operating rod (valve rod) 29 has one end in contact with the plunger 27, an intermediate portion exposed in the second refrigerant passage 10, and the other end in contact with the valve element 14 in the expansion orifice 11. I have. Inside the housings 24 and 26, the outside of the diaphragm 25 is a heat-sensitive chamber 30 and the inside is a refrigerant chamber 31. Further, a pipe 32 is connected to the outer housing 26, and an inert gas is previously sealed in the heat-sensitive chamber 30 through the pipe 32.

In this refrigeration circuit, R13 is used as a refrigerant.
4a (tetrafluoroethane) or R22 (chlorodifluoromethane) is enclosed. As shown in FIG. 6, these refrigerants are refrigerants in which the saturated moisture concentration in the gas phase is lower than the saturated moisture concentration in the liquid phase.

The box type expansion valve 2 configured as described above operates as follows. The high-compressed refrigerant discharged from the variable displacement compressor 3 is condensed by the condenser 4 and then passes through the receiver 5 and the first refrigerant passage 8 to the valve chamber 7.
Introduced within. This refrigerant passes through the expansion orifice 11 from inside the valve chamber 7, and then adiabatically expands to become a gas-liquid two-phase refrigerant and reaches the second refrigerant passage 10. Thereafter, the refrigerant is introduced into the evaporator 1 through the second refrigerant passage 10, and is vaporized to become a gas refrigerant. At this time, the evaporator 1 is cooled by the gas refrigerant and provided for cooling in the vehicle compartment. Further, the gas refrigerant discharged from the evaporator 1 is supplied to the third refrigerant passage 1
Then, the flow returns to the compressor 3 through the step 8.

The heat of the gas refrigerant passing through the third refrigerant passage 18 is transmitted to the diaphragm 25 via the plunger 27, and further transmitted from the diaphragm 25 to the inert gas in the heat-sensitive chamber 30. Then, the inert gas is expanded and contracted, and the gas pressure acts on the outer surface of the diaphragm 25. Therefore, the position of the valve body 14 with respect to the valve seat 12, that is, the opening degree of the expansion orifice 11 is set to a position where the urging force of the compression coil spring 17, the refrigerant pressure in the refrigerant chamber 31, and the gas pressure in the heat-sensitive chamber 30 are balanced. Will be kept. The amount of the refrigerant supplied to the evaporator 1 is adjusted according to the degree of opening of the expansion orifice 11.

Further, the box type expansion valve 2 is provided with a moisture removing device for removing moisture in the refrigerant of the refrigeration circuit. Hereinafter, the moisture removing device will be described. As shown in FIGS. 1 and 3, a cooling cylinder 33 is fitted into the circular recess 9 of the second refrigerant passage 10 and is fixed by a joint 34. An O-ring 35 is arranged on the outer periphery of the joint 34 to maintain airtightness. A spiral groove 36 is formed on the outer peripheral surface of the cooling cylinder 33.
The gas refrigerant can pass through the space formed between the gas refrigerant and the inner wall of the circular recess 9. Further, a branch passage 37 branching from the third refrigerant passage 18 is formed between one end of the spiral groove 36 and the third refrigerant passage 18. This branch passage 37 is located on the upstream side of the plunger 27.

Further, as shown in FIGS. 3 to 5, a cylindrical portion 38 is integrally protruded from the front side surface of the main body block 6 in the drawing.
The inside of the cylindrical portion 38 serves as a water discharge passage 39. The recess 40 formed in the back of the water discharge passage 39 and the spiral groove 36 are connected by a connection passage 41. A disc-shaped water-collecting filter 43 is arranged in the recess 40 via a spacer 42. This filter 43
Consists of glass wool. Further, a pressing plate 45 having a large number of holes 44 is fixedly disposed inside the cylindrical portion 38 outside the filter 43. The water discharge passage 39 in the cylindrical portion 38 is connected to the third refrigerant passage 18 through the connection passage 46.
Is in communication with A packing 47 is provided at the front portion in the cylindrical portion 38.
, A moisture permeable film 48 made of a polyimide resin, and a pressing plate 49 having a large number of holes 50 are fixedly arranged in a state of being overlapped. In the first embodiment, a refrigerant bypass passage is formed from the branch passage 37, the spiral groove 36, the connection passage 41, the moisture discharge passage 39, the connection passage 46, and the like.

A circular recess 51 is formed at the upstream opening of the third refrigerant passage 18. The separation pipe 52 constituting the lubricating oil removing means is fitted and fixed in the circular concave portion 51, and is kept airtight by an O-ring 53 provided on the outer peripheral portion. A projection 54 extending in the direction of the plunger 27 is formed in the separation pipe 52, and a gap is formed between the outer peripheral surface and the inner peripheral surface of the third refrigerant passage 18. That is, the upstream side of the third refrigerant passage 18 from the plunger 27 is divided into a refrigerant main flow area extending from the inside of the separation pipe 52 to the downstream side of the plunger 27 and a refrigerant sub-flow area formed by the gap. The refrigerant sub-flow area is connected to the branch passage 37.

Next, the operation of the thus configured water removing apparatus will be described. The refrigerant circulating in the refrigeration circuit has a property that the saturated moisture concentration in the gas phase is lower than the saturated moisture concentration in the liquid phase. Water dissolved in the refrigerant is separated, and mist-like water floats in the gas refrigerant. In addition, oil essential for lubrication of the refrigerator is mixed in the refrigerant, and this lubricating oil circulates in the refrigeration circuit together with the refrigerant.

Incidentally, the amount of water dissolved in the gas refrigerant depends on the partial pressure and the temperature as shown in FIG.
As the temperature increases, the amount of water that can be dissolved increases. Therefore, as described above, a part of the mist-like water generated in the evaporator 1 tends to be dissolved in the gas refrigerant at the outlet of the evaporator 1 because the gas refrigerant has a degree of superheat. The gas refrigerant in which water is excessively dissolved by the degree of the superheat is discharged from the evaporator 1.

When the air conditioner operates and the refrigerant circulates through the refrigeration circuit, the lubricating oil circulating and flowing together with the refrigerant has a higher density and a higher mass than the gas refrigerant. The straight line travels at a high speed in the projecting portion 54 of the separation pipe 52 arranged at 18. On the other hand, the low-mass portion containing little lubricating oil of the gas refrigerant has a low inertia, so that the protrusion 54 and the third refrigerant passage 18 are not provided.
Shunted at a lower flow rate in the gap between the inner wall, leading to the branch passage 37. As described above, the gas refrigerant having a small lubricating oil content is diverted, and as a result, the lubricating oil is separated and removed from a part of the refrigerant. Further, the branch passage 37
The gas refrigerant inside passes through the spiral groove 36 of the cooling cylinder 33. At this time, since the low-temperature gas-liquid two-phase refrigerant adiabatically expanded by the expansion orifice 11 passes through the cooling cylinder 33, the gas refrigerant on the outer peripheral side having a degree of superheat passes through the saturated liquid ( It is cooled by heat conduction due to the degree of superheating (0 ° C.), and water is separated and separated from the refrigerant. At this time, since the gas refrigerant passing through the spiral groove 36 removes the lubricating oil, a lubricating oil film is hardly formed on the inner peripheral surface of the spiral groove 36, and a good cooling efficiency is always obtained. As a result, the water separation can be reliably performed.

When the gas refrigerant cooled by the cooling cylinder 33 passes through the filter 43 via the connecting passage 41,
Free water generated in the evaporator 1 and free water generated in the cooling cylinder 33 are collected by the filter 43. The gas refrigerant from which free water has been collected is supplied to the holding plate 45.
Through the connection passage 46, and returns to the third refrigerant passage 18 downstream of the plunger 27. Filter 4
After the air conditioner is stopped (the refrigerating device is stopped), the free water collected in Step 3 passes through the hole 44 of the holding plate 45 and passes through the moisture permeable membrane 48.
Is released into the atmosphere.

The relationship between the third refrigerant passage 18 and the separation pipe 52 is as follows. As shown in FIG. 1, the outer diameter d ₁ (cm) of the pipe of the protrusion 54 and the inner diameter d of the third refrigerant passage 18
₂ (cm), main flow rate G (kg / h), bypass flow rate G _by (g / h), bypass section flow rate V ₂ (cm / sec)
c), given the density ρ (g / cm ³ ) of the gas refrigerant, V ₂
Is represented by the following equation.

V ₂ = G _by / {900 ρπ (d ₂ ² −d ₁ ² )} If d ₂ → large, V ₂ → small, so the lubricating oil separation performance is improved, but d ₂ → large. Then the diameter is d ₂ → d ₁
And the pressure loss when expanding from d _{1 to} d ₂ both increase, which has the adverse effect of reducing the main flow rate G. Therefore, it is necessary to increase d _{2 as long as} the adverse effect of the pressure loss does not become significant.

As described above, in the first embodiment, the problem that the dehumidifying function is deteriorated due to the mixing of the lubricating oil is solved only by disposing the simple member called the separation pipe 52 in the main body block 6 of the expansion valve 2. can do.

[0030]

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment,
Instead of the separation pipe 52, the surrounding member 61 having the surrounding portion 62 for surrounding the branch passage 37 is provided in the third refrigerant passage 18.
It is fixed to. Enclosure 62 and third refrigerant passage 1
A gap is formed between the inner peripheral surface of the plunger 8 and the inner peripheral surface of the plunger 8, and the end of the gap on the plunger 27 side is open.

Therefore, in the second embodiment as well, similarly to the first embodiment, a branch of the gas refrigerant having a small lubricating oil content is generated in the gap, and the branch reaches the branch passage 37.

[0032]

Third Embodiment Next, a third embodiment will be described with reference to FIG. In the third embodiment, the variable displacement compressor 7
1, a condenser 72, a receiver 73, an expansion valve 74, an evaporator 75, and an evaporation pressure adjusting valve 76 are connected in order,
A refrigeration circuit is configured. The evaporating pressure regulating valve 76 is provided to prevent the frost of the evaporator 75 under the operating condition with a small heat load. It serves to keep the evaporation pressure at 75 at or above 2.9 kgf / cm ² absolute.

A connecting pipe 78 is fixed to a pipe 77 connecting the evaporating pressure regulating valve 76 and the evaporator 75, and the connecting pipe 78 communicates with the inside of the pipe 77. A connection pipe portion 80 of a housing 79 is screwed into the connection pipe 78 via an O-ring 81. A top surface of the housing 79 is opened, and a concave portion 82 having a large sectional area and a large volume is formed. The concave portion 82 communicates with the inside of the pipe 77 through a through hole 83 formed in the bottom portion. Further, a through hole 84 is formed in the side wall of the recess 82. A spacer 85 is arranged in the concave portion 82,
A filter 86 made of glass wool is disposed thereon, and a tubular holding tube 87 is further disposed thereon. In the opening of the concave portion 82, a packing 88, a moisture permeable film 89 made of polyimide resin, a holding plate 9 having a large number of holes are provided.
0 are arranged in an overlapping state, and fixed by swaging. A through-hole 91 is formed in the holding tube 87 and communicates with the through-hole 84. A connection pipe 92 communicating with the through hole 84 is provided on a side surface of the housing 79.

On the other hand, a connecting pipe 94 is fixed to a pipe 93 connecting the compressor 71 and the evaporating pressure regulating valve 76, and the connecting pipe 94 communicates with the pipe 93. A connection tube 94 and a connection tube 92 provided in the housing 79 are connected by a capillary tube 95. That is, both ends of the capillary tube 95 are connected to the connection tubes 94 and 92 by the nuts 97 via the O-rings 96.

The pipe 77 is divided into two parts at the connection pipe part 80, and one end of the pipe 100 is formed to have a small diameter (small diameter part 103) , and is arranged corresponding to the opening of the connection pipe part 80. ing. Reference numeral 102 denotes a brazing portion.

Next, the water removing apparatus thus configured operates as follows. When the evaporating pressure regulating valve 76 is operating normally, the upstream side of the evaporating pressure regulating valve 76 is set at 2.
A gas-liquid two-phase refrigerant of 9 kgf / cm ² flows, while the pressure loss on the downstream side of the evaporating pressure regulating valve 76 is less than 2.9 kgf / cm ² due to the pressure loss of the regulating valve 76. Due to this pressure difference, the refrigerant flows through the through-hole 83 and the through-hole 9 of the holding pipe 87.
1, through the through-hole 84 and the capillary tube 95, and is returned to the downstream pipe 93 of the evaporation pressure regulating valve 76. At this time,
The gas-liquid two-phase refrigerant that has flowed into the connecting pipe portion 80 adiabatically expands at its outlet to become a gas-phase or gas-liquid two-phase refrigerant at 0 ° C. or lower. Moisture generated by this gasification is as follows:
Freeze because it is below ℃. This ice is collected by the filter 86. The moisture permeable membrane 89 (the specific compartment permeable membrane) allows only the moisture to pass therethrough without stopping the refrigerant when the refrigeration circuit is stopped, and releases the moisture of the filter 86 collected when the refrigerant circuit is driven to the atmosphere.

[0037] Then, the small diameter portion 10 of the in the third embodiment, gas refrigerant pipe 100 containing a large amount of lubricating oil
In addition to straight through 3, <br/> gas refrigerant hardly contain lubricating oil is introduced into the connecting pipe portion 80 through the gap between the inner peripheral portion of the small-diameter portion 103 and the pipe 77.

[0038]

Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG. In the fourth embodiment, a plurality of barriers 121 are provided at the inlet of a bypass passage 120 having a cooling device for separating water so that the bypass flow of the gas refrigerant meanders. The refrigerant gas flow introduced into the bypass passage 120 strikes the barrier 121, thereby separating lubricating oil from the gas flow. The separated lubricating oil adheres to the barrier 121, and falls into the refrigerant main circulation passage 122 when the amount exceeds a predetermined amount. Thus, the lubricating oil is substantially removed from the refrigerant gas flow that has passed through the plurality of barriers 121.

The present invention is not limited to the above embodiments. For example, the present invention may be embodied in a type of water removing device using a cold trap in a bypass passage, or a cooling device may be used as a dehumidifying means. Instead, the present invention may be embodied in an apparatus configured to perform dehumidification using a moisture adsorbent or the like, and may be arbitrarily changed without departing from the spirit of the invention. Note that the first embodiment
Of the "projecting portion 54", the "enclosing portion 62" of the second embodiment and the
The “small diameter portion 103” of the third embodiment is the inner peripheral surface of the refrigerant main circulation path.
Corresponds to a “pipe line” that forms a predetermined gap.

[0040]

As described in detail above, according to the present invention,
The lubricating oil is removed from the refrigerant to prevent the lubricating oil from intruding into the water removing mechanism, and it is possible to suppress a decrease in the dehumidifying function, thereby exhibiting an excellent effect of always performing good water removing.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a refrigeration apparatus according to a first embodiment, which embodies a moisture removal apparatus of the present invention.

FIG. 2 is a perspective view showing a box-type expansion valve and an evaporator.

FIG. 3 is a partially cutaway perspective view showing an internal configuration of a box type expansion valve.

FIG. 4 is a plan view showing a part of the box type expansion valve in a cutaway manner.

FIG. 5 is a plan sectional view of the box type expansion valve.

FIG. 6 is a diagram showing a relationship between a temperature and a saturated moisture concentration in a refrigerant.

FIG. 7 is a diagram showing a relationship between a degree of superheat and a saturated moisture concentration in a refrigerant.

FIG. 8 is a view schematically showing a refrigeration apparatus according to a second embodiment which embodies the moisture removal apparatus of the present invention.

FIG. 9 is a plan sectional view showing the surrounding member.

FIG. 10 is a diagram schematically illustrating a refrigeration apparatus according to a third embodiment that embodies the moisture removal apparatus of the present invention.

FIG. 11 is a diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Evaporator, 2 ... Box type expansion valve, 3 ... Variable capacity compressor, 4 ... Condenser, 5 ... Receiver, 18
... a third refrigerant passage as a refrigerant main circulation passage, 33 ... a cooling cylinder as a dehumidifying means, 37 ... a branch passage as a refrigerant bypass passage, 41 ... a connection passage as a bypass passage,
43: Filter as dehumidifying means, 46: Connection passage as bypass passage, 52 ... Separation pipe as lubricating oil removing means , 54 ... Protrusion as piping, 61 ... Lubricating oil removal
A surrounding member as a means, 62 ... a surrounding portion as a conduit, 7
7 ... piping as refrigerant main circulation passage, 83 ... refrigerant bypass
Through holes as passages, 100 as lubricating oil removing means
Piping, 103: small-diameter portion as conduit, 120: refrigerant
Bypass passage as pass passage, 121 ... Hand for removing lubricant
Barrier as a step, 122 ... refrigerant main circulation passage .

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25B 43/00 F25B 43/02 F25B 49/02

Claims (3)

(57) [Claims] 1. An evaporator, an expansion valve, a compressor,
A refrigerant bypass passage is connected to a part of the refrigerant main circulation passage of the refrigeration circuit including the condenser and the receiver, and a dehumidifying unit is provided in the bypass passage, and a part of the refrigerant flowing in the refrigerant main circulation passage is located in the refrigerant bypass passage. In the refrigeration apparatus, the refrigerant in the refrigerant is separated and removed by the dehumidifying means, and the refrigerant after the water removal is returned to the refrigerant main circulation passage.
The lubricating oil removing means for separating and removing the lubricating oil in the refrigerant is provided on the inner peripheral surface of the refrigerant main circulation passage.
A water removing device for a refrigerating device, comprising a pipeline capable of forming a predetermined gap with respect to the water. 2. The refrigerant oil removing means according to claim 1, wherein the lubricating oil removing means is provided at a portion where the refrigerant bypass passage branches off from the refrigerant main circulation passage, and generates a branch flow having a lower flow velocity than the refrigerant flow velocity in the refrigerant main circulation passage. Moisture removal equipment for refrigeration equipment. 3. An evaporator, an expansion valve, a compressor,
Refrigerant main circuit of refrigeration circuit including condenser and receiver
Connect the refrigerant bypass passage to part of the
Dehumidifying means is provided in the bypass passage and flows through the refrigerant main circulation passage.
A part of the refrigerant flowing into the refrigerant bypass passage is
The water in the refrigerant is separated and removed by the step,
The refrigeration system is configured so that the refrigerant returns to the refrigerant main circulation passage.
And Lubricating oil in the refrigerant is separated and removed in the refrigerant bypass passage.
And a lubricating oil removing means for removing the lubricating oil.
The bypass flow of the refrigerant passing through the refrigerant bypass passage meanders
Characterized by a barrier arranged so that it can be
Refrigerator water removal device.