JP6670197B2 - Condenser for compression refrigerator - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a condenser for a compression refrigerator that exchanges heat between high-pressure refrigerant gas discharged from a compressor and cooling water (cooling fluid) to condense the refrigerant gas.

  Conventionally, compression chillers such as turbo chillers used for refrigeration air conditioners and the like are configured with a closed system in which a refrigerant is sealed, and take heat from chilled water (fluid to be cooled) to evaporate the refrigerant, thereby reducing the refrigeration effect. An evaporator to be exerted, a compressor that compresses the refrigerant gas evaporated by the evaporator into a high-pressure refrigerant gas, a condenser that cools and condenses the high-pressure refrigerant gas with cooling water (cooling fluid), An expansion valve (expansion mechanism) for decompressing and expanding the condensed refrigerant is connected by a refrigerant pipe.

  For example, a condenser used in a compression refrigerator such as a centrifugal chiller has a large number of heat transfer tubes in a space formed by a cylindrical can body and tube plates provided at both ends of the can body. The heat transfer tubes are arranged in a zigzag pattern. The high-pressure refrigerant gas discharged from the compressor flows into the space from the upper portion of the can body and is cooled and condensed by heat exchange with cooling water flowing in the heat transfer tubes while passing through the heat transfer tube group. I do.

JP 2016-23913 A

  The types of refrigerants used in compression refrigerators such as turbo refrigerators include low-pressure refrigerants such as R123 and high-pressure refrigerants such as R134a. During operation of a turbo refrigerator using a low-pressure refrigerant, there are places where the internal pressure of the device is lower than the atmospheric pressure. For this reason, air or the like may leak into the device from a connection portion such as a pipe. The air does not condense at the operating temperature of the refrigerator, and stays in the condenser. When an uncondensable gas such as air is present, there is a problem that the condensation performance of the condenser is reduced. Low-pressure refrigerant turbo refrigerators need to extract non-condensable gas. Usually, air is extracted in the upper space of the condenser. However, during operation, there is a problem that steam cannot be easily extracted because the steam flows in the upper space of the condenser and the air flows together with the steam into the heat transfer tube group and stays in the heat transfer tube group.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a compressor for a compression-type refrigerator that can collect non-condensable gas in a place where bleeding is easy to extract and constantly discharge the refrigerant, and can maintain the condensation performance of the refrigerant. The purpose is to provide.

  In order to achieve the above-described object, a compression refrigerator condenser according to the present invention includes a can body, a tube sheet that closes both ends of the can body, and a heat transfer tube group arranged in the can body. In a condenser for a compression-type refrigerator that performs heat exchange between the refrigerant gas introduced into the can body and cooling water flowing through the heat transfer tube group to condense the refrigerant gas, the inner wall of the can body A baffle plate is provided between the heat transfer tube group, a place where the non-condensable gas stays is formed by the baffle plate, and a place where the non-condensable gas stays is provided with an extraction tube for extracting the non-condensable gas, The bleed tube is located below the baffle plate.

According to a preferred aspect of the present invention, the baffle plate is provided so as to cover a predetermined number of heat transfer tubes from outside the heat transfer tube group.
By covering at least one of the heat transfer tubes with the baffle plate, the inflow of the refrigerant vapor into the place where the non-condensable gas stays is suppressed, and the non-condensable gas easily stays. Conversely, regarding the maximum width of the baffle plate, the number of heat transfer tubes that does not hinder the condensation of the refrigerant should be set according to the product specifications, such as when the interval between the heat transfer tubes is large or in the case of large machines with many heat transfer tubes. What is necessary is just to determine the covering width.

According to a preferred aspect of the present invention, the bleeding tube is provided near the inlet of the first-pass heat transfer tube group or near the outlet of the first-pass heat transfer tube group of the cooling water.
According to a preferred aspect of the present invention, the bleeding tube is provided at a position of the can body far from the refrigerant vapor inlet of the condenser.
According to a preferred aspect of the present invention, the heat transfer tube group is arranged in a plurality of stages in the vertical direction, and the baffle and the bleeding tube are provided on the lowermost heat transfer tube group side.

According to a preferred aspect of the present invention, the bleeding tube is formed of a short tube having at least one bleeding hole.
According to a preferred aspect of the present invention, the bleeding tube comprises a header tube having a plurality of bleeding holes formed at intervals.

According to a preferred aspect of the present invention, a part of a gap between the inner wall of the can body and the heat transfer tube group is made wider than other gap parts to form a flow path through which a refrigerant gas easily flows. And
According to a preferred aspect of the present invention, the heat transfer tubes of the heat transfer tube group are arranged in a staggered manner, and at least one row of the staggered heat transfer tubes is removed to form a gap, and the gap is used as a coolant gas flow path. Features.

The present invention has the following effects.
(1) The non-condensable gas is collected in a place where bleeding is easy, and bleeding can be performed effectively.
(2) Since the non-condensable gas can be constantly discharged, the condensation performance of the condenser can be maintained.

FIG. 1 is a schematic diagram showing a turbo refrigerator including a condenser according to the present invention. FIG. 2 is a sectional view showing an example of the entire structure of the condenser shown in FIG. FIG. 3 is a diagram showing the condenser according to the first embodiment, and is a side sectional view of the condenser. FIG. 4 is a diagram illustrating the condenser according to the first embodiment, and is a front view of the condenser. FIGS. 5A and 5B are cross-sectional views of the bleed tube shown in FIGS. FIG. 6 is a view showing a condenser according to the second embodiment, and is a side sectional view of the condenser. FIG. 7 is a diagram illustrating a condenser according to the second embodiment, and is a front view of the condenser. FIG. 8 is a perspective view of the bleed tube shown in FIGS. 6 and 7. FIG. 9 is a diagram showing a condenser according to the third embodiment, and is a side sectional view of the condenser. FIG. 10 is a diagram illustrating a condenser according to the third embodiment, and is a front view of the condenser. Drawing 11 is a figure showing the condenser concerning a 4th embodiment, and is a sectional side view of the condenser. FIG. 12 is a diagram illustrating a condenser according to the fourth embodiment, and is a front view of the condenser. FIG. 13 is a diagram showing a condenser according to the fifth embodiment, and is a side sectional view of the condenser. FIG. 14 is a diagram illustrating the condenser 2 according to the sixth embodiment, and is a side sectional view of the condenser. Drawing 15 is a figure showing the condenser concerning a 7th embodiment, and is a side sectional view of a condenser. Drawing 16 is a figure showing the condenser concerning an 8th embodiment, and is a sectional side view of the condenser. Drawing 17 (a)-(d) is a figure showing an embodiment where a refrigerant inlet is arranged in a side of a can body, and is a sectional side elevation of a condenser.

Hereinafter, an embodiment of a condenser for a compression refrigerator according to the present invention will be described with reference to FIGS. 1 to 17, the same or corresponding components are denoted by the same reference numerals, and redundant description will be omitted. In the present embodiment, a turbo refrigerator using a turbo compressor is shown as an example of a compression refrigerator, but a compressor using a screw type, a reciprocating type, a scroll type, or the like may be used.
FIG. 1 is a schematic diagram showing a turbo refrigerator including a condenser according to the present invention. As shown in FIG. 1, a turbo refrigerator includes a turbo compressor 1 that compresses a refrigerant, a condenser 2 that cools and compresses a compressed refrigerant gas with cooling water (cooling fluid), and a cold water (fluid to be cooled). ), The refrigerant evaporates by evaporating the refrigerant to exhibit a refrigerating effect, and an economizer 4 which is an intercooler disposed between the condenser 2 and the evaporator 3. Are connected by a refrigerant pipe 5 circulating. A low-pressure refrigerant such as R123 is used as the refrigerant.

  In the embodiment shown in FIG. 1, the turbo compressor 1 is configured by a multi-stage turbo compressor. The turbo compressor 1 is connected to the economizer 4 by a refrigerant pipe 5, and the refrigerant gas separated by the economizer 4 is an intermediate portion (in this example, two stages) of a multi-stage compression stage (two stages in this example) of the multi-stage turbo compressor. (The part between the first stage and the second stage).

  In the refrigeration cycle of the turbo refrigerator configured as shown in FIG. 1, the refrigerant circulates through the turbo compressor 1, the condenser 2, the evaporator 3, and the economizer 4, and the evaporator 3 produces cold water to load. Correspondingly, the amount of heat from the evaporator 3 taken into the refrigeration cycle and the amount of heat corresponding to the work of the turbo compressor 1 supplied from the compressor motor are released to the cooling water supplied to the condenser 2. On the other hand, the refrigerant gas separated by the economizer 4 is introduced into an intermediate portion of the multi-stage compression stage of the turbo compressor 1 and merges with the refrigerant gas from the first stage compressor to be compressed by the second stage compressor. According to the two-stage compression single-stage economizer cycle, the refrigeration effect of the economizer 4 is added, so the refrigeration effect is increased by that amount, and the refrigeration effect is made more efficient than when the economizer 4 is not installed. Can be.

FIG. 2 is a sectional view showing an example of the entire structure of the condenser 2 shown in FIG. As shown in FIG. 2, the condenser 2 staggers a large number of heat transfer tubes 13 in a space formed by a cylindrical can body 11 and tube plates 12 provided at both ends of the can body 11. The heat transfer tube group 14 arranged in a shape is arranged. The refrigerant gas flows from the refrigerant inlet 11 _IN at the upper part of the can body 11, passes through the heat transfer tube group 14, and flows between the coolant water flowing through the heat transfer tube group while passing through the heat transfer tube group 14. It is cooled by heat exchange and condenses. The condensed liquid (refrigerant liquid) flows out from a refrigerant outlet 11 _{OUT at} the bottom of the can body 11. Directly below the refrigerant inlet 11 _IN inlet baffle 19 is installed. The heat transfer tube 13 is configured such that cooling water (cooling fluid) flows therein, and extends in the longitudinal direction of the can body 11. Header portions 15R, 15L are connected to the tube sheets 12, 12, respectively. The header portion 15L is vertically divided by a partition plate 16, and the header portion 15L is provided with a cooling water inlet _15IN and a cooling water outlet _15OUT .

In FIG. 2, a description will be given as a two-pass heat transfer tube group. That is, the heat transfer tube group 14 comprising a plurality of heat transfer tubes 13 is made from the upper heat transfer tube group 14U communicating with the cooling water inlet 15 _IN and the cooling water outlet 15 lower heat transfer tube group communicated with _OUT 14L. Cooling water, to flow out from the cooling water outlet 15 _OUT After flowing the upper heat transfer tube group 14U and flows from the cooling water inlet 15 _IN of the header portion 15L folded in the header portion 15R, after flowing through the lower heat transfer tube group 14L It has become. As shown in the drawing, the type in which the cooling water inlet 15 _IN is on the upper side and the cooling water outlet 15 _OUT is on the lower side is called upper IN and lower OUT, and the cooling water inlet 15 _IN is on the lower side. The type in which the water outlet 15 _OUT is on the upper side is called lower IN and upper OUT.

3 and 4 are views showing the condenser 2 according to the first embodiment. FIG. 3 is a sectional side view of the condenser 2, and FIG. 4 is a front view of the condenser 2. The condenser 2 according to the first embodiment is a condenser provided with a 4-pass heat transfer tube group, and is an upper IN and lower OUT type condenser. In the case of the upper IN and lower OUT type condensers, the non-condensable gas tends to stay on the upper heat transfer tube group side where the cooling water temperature is low. In the first embodiment, as shown in FIG. 3, the upper heat transfer tube group 14U is divided into left and right, and is composed of an upper left heat transfer tube group 14UL and an upper right heat transfer tube group 14UR. The first pass of the cooling water may be the upper left heat transfer tube group 14UL or the upper right heat transfer tube group 14UR. The lower heat transfer tube group 14L is similarly divided into a lower left heat transfer tube group 14LL and a lower right heat transfer tube group 14LR. A pair of left and right baffle plates 17 are fixed to the inner wall of the can body 11 at positions slightly above the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR. Each baffle plate 17 is formed of an elongated thin plate-like member, and extends in the longitudinal direction of the can body 11 between the tube sheets 12. When the extraction tube is a short tube, the baffle plate 17 may be a part near the extraction tube 18 instead of the full length. The pair of left and right baffle plates 17, 17 extend horizontally inward from the inner wall of the can body 11, and are on the end side of the uppermost row of the heat transfer tube rows in the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR. It is arranged so as to cover a predetermined number of heat transfer tubes 13. Since at least one of the heat transfer tubes 13 is covered by the baffle plate 17, the inflow of the refrigerant vapor to the place where the non-condensable gas stays is suppressed, and the non-condensable gas easily stays. Conversely, for the maximum width of the baffle plate, the number of heat transfer tubes that does not hinder the condensation of the refrigerant should be set according to the product specifications, such as when the interval between the heat transfer tubes is large or in a large machine with many heat transfer tubes. What is necessary is just to determine the covering width.
Below the pair of left and right baffle plates 17, 17, extraction tubes 18 for extracting non-condensable gas are installed. The baffle plate 17 and the bleed tube 18 may be paired on the left and right, but the effect can be exerted on one of the first pass side.

As shown in FIG. 4, the bleeding tubes 18 are installed at both ends of the can body 11.
FIGS. 5A and 5B are cross-sectional views of the bleed tube 18 shown in FIGS. Although the bleeding pipe 18 may be a simple pipe having both ends opened, according to a preferred embodiment, as shown in FIG. 5A, the bleeding pipe 18 is formed of a cylindrical pipe, and its tip is closed. An opening 18a is provided at the rear end, and a bleed hole 18h is provided at a lower portion on the front end side. As shown in FIG. 5B, the bleeding pipe 18 may be a short pipe whose tip is cut into a slope. The cut surface faces downward. With such a configuration, it is difficult for the refrigerant liquid to flow into the bleeding pipe, and bleeding is easy. The bleeding pipe 18 has its leading end inserted into the can body 11, thereby extracting the non-condensable gas in the can body 11 through the bleed hole 18 h, and passing the extracted non-condensable gas to the opening 18 a at the rear end. The gas is discharged to a purge tank (not shown).

In the condenser 2 according to the first embodiment, as shown in FIG. 3, a pair of left and right baffles are provided on the inner wall of the can body 11 at positions slightly above the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR. The plates 17, 17 are fixed, and bleed tubes 18, 18 are provided below the pair of left and right baffle plates 17, 17. As shown in FIG. 3, the refrigerant gas G flows into the refrigerant inlet 11 flows into the _IN top left heat transfer tube group 14UL and upper right heat transfer tube group 14UR at the top of the can body 11. A part of the refrigerant gas (refrigerant vapor) flowing into the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR is condensed on the heat transfer tube surface, and a part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. A part of the refrigerant gas G flowing from the refrigerant inlet 11 _IN passes through a gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, flows into the lower heat transfer tube group 14L, and a part of the refrigerant gas. G passes through the gap between the upper left heat transfer tube group 14UL and the lower left heat transfer tube group 14LL and the gap between the upper right heat transfer tube group 14UR and the lower right heat transfer tube group 14LR, and further passes through the inner wall of the can body 11. It flows into the gap between the upper left heat transfer tube group 14UL and the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR.
On the other hand, since a pair of left and right baffle plates 17 and 17 are installed above the uppermost heat transfer tube row of the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, the inner wall of the can body 11 and the upper left side are arranged. The gap between the heat transfer tube group 14UL and the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR are blocked, so that the refrigerant gas is unlikely to flow downward from this gap, and the heat transfer tube near the lower portion of the baffle plate. Still has sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer tubes here is performed from the inside of the upper heat transfer tube group 14U to the gap between the inner wall of the can body 11 and the upper left heat transfer tube group 14UL and the inner wall of the can body 11 and the upper right heat transfer tube group 14UR. Through the gap between the upper left heat transfer tube group 14UL and the lower left heat transfer tube group 14LL and between the upper right heat transfer tube group 14UR and the lower right heat transfer tube group 14LR. Further, the gas is supplied by the refrigerant gas flowing from the gap between the inner wall of the can body 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR. The flow of the refrigerant gas G flowing from above in this way is blocked by the pair of left and right baffle plates 17, 17, and flows toward the heat transfer tubes near the lower portion of the baffle plate from inside the heat transfer tube group and from below the heat transfer tube group. A flow is formed. The refrigerant gas (refrigerant vapor) flowing near the lower portion of the baffle plate is condensed on the surface of the heat transfer tube, and the non-condensable gas mixed in the refrigerant gas is likely to stay. Therefore, since the non-condensable gas stays below each baffle plate 17, the remaining non-condensable gas is extracted by the bleed pipe 18, and the extracted non-condensable gas is discharged to a purge tank (not shown).

  6 and 7 are views showing a condenser 2 according to the second embodiment. FIG. 6 is a side sectional view of the condenser 2 and FIG. 7 is a front view of the condenser 2. The condenser 2 according to the second embodiment is a condenser provided with a four-pass heat transfer tube group, and is an upper IN and lower OUT type condenser as in the first embodiment. In the second embodiment, as shown in FIG. 6, the upper heat transfer tube group 14U is divided into left and right, and includes an upper left heat transfer tube group 14UL and an upper right heat transfer tube group 14UR. The lower heat transfer tube group 14L is similarly divided into a lower left heat transfer tube group 14LL and a lower right heat transfer tube group 14LR. A pair of left and right baffle plates 17 are fixed to the inner wall of the can body 11 at positions slightly above the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR. Each baffle plate 17 is formed of an elongated thin plate-like member, and extends in the longitudinal direction of the can body 11 between the tube sheets 12. The pair of left and right baffle plates 17, 17 extend horizontally inward from the inner wall of the can body 11, and are on the end side of the uppermost row of the heat transfer tube rows in the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR. It is arranged so as to cover a predetermined number of heat transfer tubes 13. Below the pair of left and right baffle plates 17, 17, extraction tubes 18 for extracting non-condensable gas are installed. The baffle plate 17 and the bleed tube 18 may be paired on the left and right, but the effect can be exerted on one of the first pass side.

As shown in FIG. 7, the bleeding pipe 18 is formed of a cylindrical pipe extending in the longitudinal direction of the can body 11.
FIG. 8 is a perspective view of the bleed tube 18 shown in FIGS. As shown in FIG. 8, the bleeding pipe 18 is formed of a long cylindrical pipe, both ends of which are closed, and has a large number of bleeding holes 18h formed at intervals below. The bleed pipe 18 is provided with an exhaust pipe 18e formed of a short pipe at the center. The bleeding pipe 18 bleeds the non-condensable gas in the can body 11 through a number of bleed holes 18 h by inserting a long cylindrical pipe into the can body 11, The gas is discharged to a purge tank (not shown) by an exhaust pipe 18e.

In the condenser 2 according to the second embodiment, as shown in FIG. 6, a pair of left and right baffles are provided on the inner wall of the can body 11 at positions slightly above the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR. The plates 17, 17 are fixed, and bleed tubes 18, 18 are provided below the pair of left and right baffle plates 17, 17. As shown in FIG. 6, the refrigerant gas G flows into the refrigerant inlet 11 flows into the _IN top left heat transfer tube group 14UL and upper right heat transfer tube group 14UR at the top of the can body 11. A part of the refrigerant gas (refrigerant vapor) flowing into the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR is condensed on the heat transfer tube surface, and a part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. A part of the refrigerant gas G flowing from the refrigerant inlet 11 _IN passes through a gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, flows into the lower heat transfer tube group 14L, and a part of the refrigerant gas. G passes through a gap between the upper left heat transfer tube group 14UL and the lower left heat transfer tube group 14LL and a gap between the upper right heat transfer tube group 14UR and the lower right heat transfer tube group 14LR, and further passes through the inner wall of the can body 11. It flows into the gap between the upper left heat transfer tube group 14UL and the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR.
On the other hand, since a pair of left and right baffle plates 17 and 17 are installed above the uppermost heat transfer tube row of the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, the inner wall of the can body 11 and the upper left side are arranged. The gap between the heat transfer tube group 14UL and the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR are blocked, so that the refrigerant gas is unlikely to flow downward from this gap, and the heat transfer tube near the lower portion of the baffle plate. Still has sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer tubes here is performed from the inside of the upper heat transfer tube group 14U to the gap between the inner wall of the can body 11 and the upper left heat transfer tube group 14UL and the inner wall of the can body 11 and the upper right heat transfer tube group 14UR. Through the gap between the upper left heat transfer tube group 14UL and the lower left heat transfer tube group 14LL and the gap between the upper right heat transfer tube group 14UR and the lower right heat transfer tube group 14LR. Further, the gas is supplied by the refrigerant gas flowing from the gap between the inner wall of the can body 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR. The flow of the refrigerant gas G flowing from above in this way is blocked by the pair of left and right baffle plates 17, 17, and flows toward the heat transfer tubes near the lower portion of the baffle plate from inside the heat transfer tube group and from below the heat transfer tube group. A flow is formed. The refrigerant gas (refrigerant vapor) flowing near the lower portion of the baffle plate is condensed on the surface of the heat transfer tube, and the non-condensable gas mixed in the refrigerant gas is likely to stay. Therefore, since the non-condensable gas stays below each baffle plate 17, the non-condensable gas is extracted by the bleed pipe 18, and the extracted non-condensable gas is discharged to the purge tank.

  9 and 10 are views showing a condenser 2 according to the third embodiment. FIG. 9 is a sectional side view of the condenser 2 and FIG. 10 is a front view of the condenser 2. The condenser 2 according to the third embodiment is a condenser provided with a 4-pass heat transfer tube group, and is a lower IN, upper OUT type condenser. In the case of the lower IN and upper OUT type condensers, the non-condensable gas tends to stay on the lower heat transfer tube group side where the cooling water temperature is low. In the third embodiment, as shown in FIG. 9, the upper heat transfer tube group 14U is divided into left and right parts, and is composed of an upper left heat transfer tube group 14UL and an upper right heat transfer tube group 14UR. The lower heat transfer tube group 14L is similarly divided into a lower left heat transfer tube group 14LL and a lower right heat transfer tube group 14LR. A pair of left and right baffle plates 17 is fixed to the inner wall of the can body 11 at a position slightly above the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR. Each baffle plate 17 is formed of an elongated thin plate-like member, and extends between the tube plates 12 in the longitudinal direction of the can body 11. When the bleed tube is a short tube, the baffle plate 17 may be a part near the bleed tube 18 instead of the full length. The pair of left and right baffle plates 17, 17 extend horizontally inward from the inner wall of the can body 11, and are on the end side of the uppermost row of the heat transfer tube rows in the lower left heat transfer tube group 14 LL and the lower right heat transfer tube group 14 LR. It is arranged so as to cover a predetermined number of heat transfer tubes 13. Below the pair of left and right baffle plates 17, 17, pipe-shaped extraction tubes 18, 18 for extracting non-condensable gas are installed. The baffle plate 17 and the bleed tube 18 may be paired on the left and right, but the effect can be exerted on one of the first pass side.

  As shown in FIG. 10, the bleeding tubes 18 are installed at both ends of the can body 11. The bleed tube 18 has the same configuration as the bleed tube 18 shown in FIG.

In the condenser 2 according to the third embodiment, as shown in FIG. 9, a pair of left and right baffles are provided on the inner wall of the can body 11 at positions slightly above the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR. The plates 17, 17 are fixed, and bleed tubes 18, 18 are provided below the pair of left and right baffle plates 17, 17. As shown in FIG. 9, the refrigerant gas G flows into the refrigerant inlet 11 flows into the _IN top left heat transfer tube group 14UL and upper right heat transfer tube group 14UR at the top of the can body 11. A part of the refrigerant gas (refrigerant vapor) flowing into the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR is condensed on the heat transfer tube surface, and a part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. Further, a part of the refrigerant gas G flowing from the refrigerant inlet 11 _IN flows into a gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, and between the inner wall of the can body 11 and the upper left heat transfer tube group 14UL. And the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR, and flows into the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR. Further, a part of the refrigerant gas G passes through a gap between the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and from below the lower heat transfer tube group 14L, the inner wall of the can body 11 and the lower left heat transfer tube group. 14LL and the gap between the inner wall of the can body 11 and the lower right heat transfer tube group 14LR.
On the other hand, a pair of left and right baffle plates 17 and 17 are installed above the uppermost row of heat transfer tubes in the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR. The gap between the heat transfer tube group 14LL and the gap between the inner wall of the can body 11 and the lower right heat transfer tube group 14LR are closed, so that the refrigerant gas is unlikely to flow downward from this gap, and the heat transfer tube near the lower part of the baffle plate is closed. Still has sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer tubes here is performed from the inside of the lower heat transfer tube group 14L to the gap between the inner wall of the can body 11 and the lower left heat transfer tube group 14LL and the inner wall of the can body 11 to the lower right heat transfer tube group 14LR. The refrigerant gas flowing toward the gap between the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and the gap between the inner wall of the can body 11 and the lower left heat transfer tube group 14LL It is supplied by the refrigerant gas flowing from the gap between the inner wall of the body 11 and the lower right heat transfer tube group 14LR. The flow of the refrigerant gas G flowing from above in this way is blocked by the pair of left and right baffle plates 17, 17, and flows toward the heat transfer tubes near the lower portion of the baffle plate from inside the heat transfer tube group and from below the heat transfer tube group. A flow is formed. The refrigerant gas (refrigerant vapor) flowing near the lower portion of the baffle plate is condensed on the surface of the heat transfer tube, and the non-condensable gas mixed in the refrigerant gas is likely to stay. Therefore, the non-condensable gas stays below each of the baffle plates 17, so that the remaining non-condensable gas is extracted by the bleed pipe 18, and the extracted non-condensable gas is discharged to the purge tank together with the refrigerant gas.

  11 and 12 are views showing a condenser 2 according to the fourth embodiment. FIG. 11 is a side sectional view of the condenser 2 and FIG. 12 is a front view of the condenser 2. The condenser 2 according to the fourth embodiment is a condenser provided with a four-pass heat transfer tube group, and is a lower IN, upper OUT type condenser as in the third embodiment. In the fourth embodiment, as shown in FIG. 11, the upper heat transfer tube group 14U is divided into left and right parts and includes an upper left heat transfer tube group 14UL and an upper right heat transfer tube group 14UR. The lower heat transfer tube group 14L is similarly divided into a lower left heat transfer tube group 14LL and a lower right heat transfer tube group 14LR. A pair of left and right baffle plates 17 is fixed to the inner wall of the can body 11 at a position slightly above the lower left heat transfer tube group 14LL and the lower right heat transfer tube group LR. Each baffle plate 17 is formed of an elongated thin plate-like member, and extends in the longitudinal direction of the can body 11 between the tube sheets 12. The pair of left and right baffle plates 17, 17 extend horizontally inward from the inner wall of the can body 11, and are on the end side of the uppermost row of the heat transfer tube rows in the lower left heat transfer tube group 14 LL and the lower right heat transfer tube group 14 LR. It is arranged so as to cover a predetermined number of heat transfer tubes 13. Below the pair of left and right baffle plates 17, 17, extraction tubes 18 for extracting non-condensable gas are installed. The baffle plate 17 and the bleed tube 18 may be paired on the left and right, but the effect can be exerted on one of the first pass side.

  As shown in FIG. 12, the bleeding pipe 18 is formed of a cylindrical pipe extending in the longitudinal direction of the can body 11. The bleed tube 18 has the same configuration as the bleed tube 18 shown in FIG.

In the condenser 2 according to the fourth embodiment, as shown in FIG. 11, a pair of left and right baffles are provided on the inner wall of the can body 11 at positions slightly above the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR. The plates 17, 17 are fixed, and bleed tubes 18, 18 are provided below the pair of left and right baffle plates 17, 17. As shown in FIG. 11, the refrigerant gas G flows into the refrigerant inlet 11 flows into the _IN top left heat transfer tube group 14UL and upper right heat transfer tube group 14UR at the top of the can body 11. A part of the refrigerant gas (refrigerant vapor) flowing into the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR is condensed on the heat transfer tube surface, and a part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. Further, a part of the refrigerant gas G flowing from the refrigerant inlet 11 _IN flows into a gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, and between the inner wall of the can body 11 and the upper left heat transfer tube group 14UL. And the gap between the inner wall of the can body 11 and the upper right heat transfer tube group 14UR, and flows into the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR. Further, a part of the refrigerant gas G passes through a gap between the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and from below the lower heat transfer tube group 14L, the inner wall of the can body 11 and the lower left heat transfer tube group. 14LL and the gap between the inner wall of the can body 11 and the lower right heat transfer tube group 14LR.
On the other hand, a pair of left and right baffle plates 17 and 17 are installed above the uppermost row of heat transfer tubes in the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR. The gap between the heat transfer tube group 14LL and the gap between the inner wall of the can body 11 and the lower right heat transfer tube group 14LR are closed, so that the refrigerant gas is unlikely to flow downward from this gap, and the heat transfer tube near the lower part of the baffle plate is closed. Still has sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer tubes here is performed from the inside of the lower heat transfer tube group 14L to the gap between the inner wall of the can body 11 and the lower left heat transfer tube group 14LL and the inner wall of the can body 11 to the lower right heat transfer tube group 14LR. The refrigerant gas flowing toward the gap between the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and the gap between the inner wall of the can body 11 and the lower left heat transfer tube group 14LL It is supplied by the refrigerant gas flowing from the gap between the inner wall of the body 11 and the lower right heat transfer tube group 14LR. The flow of the refrigerant gas G flowing from above in this way is blocked by the pair of left and right baffle plates 17, 17, and flows toward the heat transfer tubes near the lower portion of the baffle plate from inside the heat transfer tube group and from below the heat transfer tube group. A flow is formed. The refrigerant gas (refrigerant vapor) flowing near the lower portion of the baffle plate is condensed on the surface of the heat transfer tube, and the non-condensable gas mixed in the refrigerant gas is likely to stay. Therefore, since the non-condensable gas stays below each baffle plate 17, the remaining non-condensable gas is extracted by the bleed pipe 18, and the extracted non-condensable gas is discharged to the purge tank.

  FIG. 13 is a diagram illustrating the condenser 2 according to the fifth embodiment, and is a side sectional view of the condenser 2. The condenser 2 according to the fifth embodiment is a condenser having a two-pass heat transfer tube group, and is a lower IN, upper OUT type condenser. In the case of the lower IN and upper OUT type condensers, the non-condensable gas tends to stay on the lower heat transfer tube group side where the cooling water temperature is low. In the fifth embodiment, as shown in FIG. 13, a heat transfer tube group 14 including a number of heat transfer tubes 13 includes a lower heat transfer tube group 14 </ b> L communicating with a cooling water inlet and an upper heat transfer tube group communicating with a cooling water outlet. 14U.

In the fifth embodiment, since the bleeding tubes 18 are provided at the upper, middle, and lower stages of the condenser 2, respectively, the bleeding tubes 18 are distinguished by using subscripts 1, 2, and 3. That is, in the fifth embodiment, a lower coolant inlet 11 _IN of the top of the can body, by placing a baffle plate 20 immediately above the upper heat transfer tube groups 14U, flows from the refrigerant inlet 11 _IN The cooled refrigerant gas G hits the baffle plate 20 and then flows into the upper heat transfer tube group 14U. Some refrigerant gas flows into the lower surface of the baffle plate 20, but non-condensable gas tends to stay on the lower surface of the baffle plate 20. Therefore, an extraction tube 18-1 for extracting non-condensable gas is provided on the lower surface side of the baffle plate 20. The bleed tube 18-1 has the same configuration as the bleed tube 18 shown in FIG. 5, but the bleed hole 18h is on the upper surface side of the cylindrical tube.

  In addition, an air extraction tube 18-2 is installed in a gap between the upper heat transfer tube group 14U and the lower heat transfer tube group 14L. On the inner wall of the can body 11, a pair of left and right baffle plates 17, 17 is fixed at a position near the lowermost stage of the lower heat transfer tube group 14L. Each baffle plate 17 is formed of an elongated thin plate-like member, and extends in the longitudinal direction of the can body 11 between the tube sheets 12. When the extraction tube is a short tube, the baffle plate 17 may be a part near the extraction tube 18 instead of the full length. Each baffle plate 17 extends horizontally from the inner wall of the can body 11 toward the inside, and is arranged adjacent to the end of the lowermost heat transfer tube row in the lower heat transfer tube group 14L. Below the lower heat transfer tube group 14L, an extraction tube 18-3 for extracting non-condensable gas is provided. A plurality of bleed tubes 18-2 and 18-3 are provided at intervals in the longitudinal direction of the can body 11 (not shown) as in FIG. The bleed tubes 18-1, 18-2, and 18-3 have the same configuration as the bleed tube 18 shown in FIG.

In the condenser 2 according to the fifth embodiment, as shown in FIG. 13, the refrigerant gas G flows in from the refrigerant inlet 11 _IN at the upper part of the can body 11 and hits the baffle plate 20. Flows into. Some refrigerant gas flows into the lower surface of the baffle plate 20, but non-condensable gas tends to stay on the lower surface of the baffle plate 20. Therefore, the retained non-condensable gas is extracted by the extraction tube 18-1. Part of the refrigerant gas (refrigerant vapor) flowing into the upper heat transfer tube group 14U is condensed on the heat transfer tube surface, and part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. The refrigerant gas G part which has flowed from the refrigerant inlet 11 _IN passes through the gap between the inner wall and the upper heat transfer tube groups 14U of the can body 11, and flows into the lower heat transfer tube group 14L. Further, a part of the refrigerant gas flows downward through a gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L. However, since the baffle plate 17 is provided near the lowermost heat transfer tube row of the lower heat transfer tube group 14L, the refrigerant flowing downward through the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L. The gas flow is blocked by the baffle plate 17, and the refrigerant gas does not easily flow downward from this gap. Therefore, a part of the refrigerant gas G flows toward the inside of the lower heat transfer tube group 14L and condenses on the surface of the heat transfer tube, but the non-condensable gas mixed in the refrigerant gas flows into the central portion of the lower heat transfer tube group 14L. It is easy to stay near or below. The retained non-condensable gas is extracted by the extraction tubes 18-2 and 18-3.

  FIG. 14 is a view showing a condenser 2 according to the sixth embodiment, and is a side sectional view of the condenser 2. The condenser 2 according to the sixth embodiment is a condenser provided with a two-pass heat transfer tube group, and is a lower IN, upper OUT type condenser. In the case of the lower IN and upper OUT type condensers, the non-condensable gas tends to stay on the lower heat transfer tube group side where the cooling water temperature is low. In the sixth embodiment, as shown in FIG. 14, a heat transfer tube group 14 composed of a number of heat transfer tubes 13 includes a lower heat transfer tube group 14L communicating with a cooling water inlet and an upper heat transfer tube group communicating with a cooling water outlet. 14U.

Also in the sixth embodiment, since the bleeding pipes 18 are installed in the upper, middle, and lower stages of the condenser 2, respectively, these are distinguished sharply using the suffixes 1, 2, and 3. That is, in the sixth embodiment, a lower coolant inlet 11 _IN of the top of the can body, by placing a baffle plate 20 immediately above the upper heat transfer tube groups 14U, flows from the refrigerant inlet 11 _IN The cooled refrigerant gas G hits the baffle plate 20 and then flows into the upper heat transfer tube group 14U. Some refrigerant gas flows into the lower surface of the baffle plate 20, but non-condensable gas tends to stay on the lower surface of the baffle plate 20. Therefore, an extraction tube 18-1 for extracting non-condensable gas is provided on the lower surface side of the baffle plate 20. The bleed tube 18-1 has the same configuration as the bleed tube 18 shown in FIG. 5, but the bleed hole 18h is on the upper surface side of the cylindrical tube.

  In addition, an air extraction tube 18-2 is installed in a gap between the upper heat transfer tube group 14U and the lower heat transfer tube group 14L. On the inner wall of the can body 11, a pair of left and right baffle plates 17, 17 is fixed at a position near the lowermost stage of the lower heat transfer tube group 14L. Each baffle plate 17 is formed of an elongated thin plate-like member, and extends in the longitudinal direction of the can body 11 between the tube sheets 12. Each baffle plate 17 extends horizontally from the inner wall of the can body 11 toward the inside, and is arranged adjacent to the end of the lowermost heat transfer tube row in the lower heat transfer tube group 14L. Below the lower heat transfer tube group 14L, an extraction tube 18-3 for extracting non-condensable gas is provided. The bleed tubes 18-2 and 18-3 are each formed of a cylindrical tube extending in the longitudinal direction of the can body 11 (not shown) as in FIG. The bleed tubes 18-2 and 18-3 have the same configuration as the bleed tube 18 shown in FIG.

In the condenser 2 according to the sixth embodiment, as shown in FIG. 14, the refrigerant gas G flows in from the refrigerant inlet 11 _IN at the upper part of the can body 11 and hits the baffle plate 20. Flows into. Some refrigerant gas flows into the lower surface of the baffle plate 20, but non-condensable gas tends to stay on the lower surface of the baffle plate 20. Therefore, the retained non-condensable gas is extracted by the extraction tube 18-1. Part of the refrigerant gas (refrigerant vapor) flowing into the upper heat transfer tube group 14U is condensed on the heat transfer tube surface, and part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. The refrigerant gas G part which has flowed from the refrigerant inlet 11 _IN passes through the gap between the inner wall and the upper heat transfer tube groups 14U of the can body 11, and flows into the lower heat transfer tube group 14L. Further, a part of the refrigerant gas flows downward through a gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L. However, since the baffle plate 17 is provided near the lowermost heat transfer tube row of the lower heat transfer tube group 14L, the refrigerant flowing downward through the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L. The gas flow is blocked by the baffle plate 17, and the refrigerant gas does not easily flow downward from this gap. Therefore, a part of the refrigerant gas G flows toward the inside of the lower heat transfer tube group 14L and condenses on the surface of the heat transfer tube, but the non-condensable gas mixed in the refrigerant gas flows into the central portion of the lower heat transfer tube group 14L. It is easy to stay near or below. The retained non-condensable gas is extracted by the extraction tubes 18-2 and 18-3.

  FIG. 15 is a diagram illustrating the condenser 2 according to the seventh embodiment, and is a side sectional view of the condenser 2. The condenser 2 according to the seventh embodiment is a condenser provided with a two-pass heat transfer tube group, and is a lower IN, upper OUT type condenser. In the case of the lower IN and upper OUT type condensers, the non-condensable gas tends to stay on the lower heat transfer tube group side where the cooling water temperature is low. In the seventh embodiment, as shown in FIG. 15, a heat transfer tube group 14 composed of a number of heat transfer tubes 13 includes a lower heat transfer tube group 14L communicating with a cooling water inlet, and an upper heat transfer tube group communicating with a cooling water outlet. 14U.

In the seventh embodiment, a bleed pipe 18 is provided at a lower stage of the condenser 2.
In the seventh embodiment, the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L is wide on one side (right side in FIG. 15) and narrow on the other side (left side in FIG. 15). The baffle plate 17 is located slightly above the lower heat transfer tube group 14L on the inner wall of the can body 11 where the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L is narrower (left side in FIG. 15). Has been fixed. The baffle plate 17 is formed of an elongated thin plate-like member, and extends between the tube sheets 12 in the longitudinal direction of the can body 11. When the extraction tube is a short tube, the baffle plate 17 may be a part near the extraction tube 18 instead of the full length. The baffle plate 17 extends horizontally inward from the inner wall of the can body 11 and is disposed so as to cover a predetermined number of heat transfer tubes 13 on the end side of the uppermost heat transfer tube row in the lower heat transfer tube group 14L. ing. Below the baffle plate 17, an extraction tube 18 for extracting non-condensable gas is provided. The bleed pipes 18 are installed at both ends of the can body 11 as in FIG. 4 (not shown). The bleed tube 18 has the same configuration as the bleed tube 18 shown in FIG.

In the condenser 2 according to the seventh embodiment, as shown in FIG. 15, the refrigerant gas G flows from the refrigerant inlet 11 _IN of the top of the can body 11, and flows into the upper heat transfer tube group 14U. Part of the refrigerant gas (refrigerant vapor) flowing into the upper heat transfer tube group 14U is condensed on the heat transfer tube surface, and part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. The refrigerant gas G part which has flowed from the refrigerant inlet 11 _IN passes through the gap between the inner wall and the upper heat transfer tube groups 14U of the can body 11, and flows into the lower heat transfer tube group 14L. A part of the refrigerant gas flows downward through a wide gap (the right side in FIG. 15) between the inner wall of the can body 11 and the lower heat transfer tube group 14L. Part of the refrigerant gas flowing below the lower heat transfer tube group 14L flows toward a narrower gap (left side in FIG. 15) between the inner wall of the can body 11 and the lower heat transfer tube group 14L.
On the other hand, since the baffle plate 17 is provided above the uppermost heat transfer tube row of the lower heat transfer tube group 14L, the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L is closed, It is difficult for the refrigerant gas to flow downward from this gap, and the heat transfer tube near the lower part of the baffle plate still has a sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer tubes here includes the refrigerant gas flowing from the inside of the lower heat transfer tube group 14L toward the narrower gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L, and the lower heat transfer tube group 14L. , And is supplied by the refrigerant gas flowing from a narrower gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L. The flow of the refrigerant gas G flowing from above in this way is blocked by the baffle plate 17, and the flow of the refrigerant gas from inside the heat transfer tube group and from below the heat transfer tube group is formed toward the heat transfer tube near the lower portion of the baffle plate. . The refrigerant gas (refrigerant vapor) flowing near the lower portion of the baffle plate is condensed on the surface of the heat transfer tube, and the non-condensable gas mixed in the refrigerant gas is likely to stay. Therefore, since the non-condensable gas stays below the baffle plate 17, the remaining non-condensable gas is extracted by the bleed pipe 18 and the extracted non-condensable gas is discharged to the purge tank.

  FIG. 16 is a diagram illustrating the condenser 2 according to the eighth embodiment, and is a side sectional view of the condenser 2. The condenser 2 according to the eighth embodiment is a condenser provided with a two-pass heat transfer tube group, and is a lower IN, upper OUT type condenser. In the case of the lower IN and upper OUT type condensers, the non-condensable gas tends to stay on the lower heat transfer tube group side where the cooling water temperature is low. In the eighth embodiment, as shown in FIG. 16, a heat transfer tube group 14 including a number of heat transfer tubes 13 includes a lower heat transfer tube group 14L that communicates with a cooling water inlet and an upper heat transfer tube group that communicates with a cooling water outlet. 14U.

In the eighth embodiment, a bleed pipe 18 is provided at a lower stage of the condenser 2.
In the eighth embodiment, the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L is wide on one side (right side in FIG. 16) and narrow on the other side (left side in FIG. 16). . A baffle plate is provided on the inner wall of the can body 11 where the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L is narrower (the left side in FIG. 16) at a position slightly above the lower heat transfer tube group 14L. 17 is fixed. The baffle plate 17 is formed of an elongated thin plate-like member, and extends between the tube sheets 12 in the longitudinal direction of the can body 11. The baffle plate 17 extends horizontally inward from the inner wall of the can body 11 and is disposed so as to cover a predetermined number of heat transfer tubes 13 on the end side of the uppermost heat transfer tube row in the lower heat transfer tube group 14L. ing. Below the baffle plate 17, an extraction tube 18 for extracting non-condensable gas is provided. The bleeding pipe 18 is formed of a cylindrical pipe extending in the longitudinal direction of the can body 11 as in FIG. 7 (not shown). The bleed tube 18 has the same configuration as the bleed tube 18 shown in FIG.

In the condenser 2 according to the eighth embodiment, as shown in FIG. 16, the refrigerant gas G flows from the refrigerant inlet 11 _IN of the top of the can body 11, and flows into the upper heat transfer tube group 14U. Part of the refrigerant gas (refrigerant vapor) flowing into the upper heat transfer tube group 14U is condensed on the heat transfer tube surface, and part of the uncondensed refrigerant gas flows to the lower heat transfer tube group 14L. The refrigerant gas G part which has flowed from the refrigerant inlet 11 _IN passes through the gap between the inner wall and the upper heat transfer tube groups 14U of the can body 11, and flows into the lower heat transfer tube group 14L. A part of the refrigerant gas flows downward through a wide gap (right side in FIG. 16) between the inner wall of the can body 11 and the lower heat transfer tube group 14L. Part of the refrigerant gas flowing below the lower heat transfer tube group 14L flows toward a narrower gap (the left side in FIG. 16) between the inner wall of the can body 11 and the lower heat transfer tube group 14L.
On the other hand, since the baffle plate 17 is provided above the uppermost heat transfer tube row of the lower heat transfer tube group 14L, the gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L is closed, It is difficult for the refrigerant gas to flow downward from this gap, and the heat transfer tube near the lower part of the baffle plate still has a sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer tubes here includes the refrigerant gas flowing from the inside of the lower heat transfer tube group 14L toward the narrower gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L, and the lower heat transfer tube group 14L. , And is supplied by the refrigerant gas flowing from a narrower gap between the inner wall of the can body 11 and the lower heat transfer tube group 14L. The flow of the refrigerant gas G flowing from above in this way is blocked by the baffle plate 17, and the flow of the refrigerant gas from inside the heat transfer tube group and from below the heat transfer tube group is formed toward the heat transfer tube near the lower portion of the baffle plate. . The refrigerant gas (refrigerant vapor) flowing near the lower portion of the baffle plate is condensed on the surface of the heat transfer tube, and the non-condensable gas mixed in the refrigerant gas is likely to stay. Therefore, since the non-condensable gas stays below the baffle plate 17, the remaining non-condensable gas is extracted by the bleed pipe 18 and the extracted non-condensable gas is discharged to the purge tank.

As described above, in each of the embodiments shown in FIGS. 3 to 16, the temperature near the cooling water inlet is the lowest, and the non-condensable gas tends to collect in the heat transfer tube group near this. Therefore, the present invention is configured as follows.
1) A baffle plate 17 is provided between the heat transfer tube group and the inner wall of the can body, and a bleed tube 18 is arranged below the baffle plate 17.
2) Adjust the arrangement of the heat transfer tubes to create a flow path for the refrigerant vapor so that the vapor flow flows toward the vicinity of the extraction pipe 18.
3) Bleed tubes using short tubes are installed at both ends of the can body. In addition, the bleeding tube composed of a cylindrical tube extending in the longitudinal direction is installed in the longitudinal direction of the can body.

  According to the present invention having the above configurations 1) to 3), in a place where the cooling water temperature is low, the steam is easily condensed on the surface of the heat transfer tube, and the non-condensable gas (such as air) mixed in the refrigerant vapor is used. Easy to stay in these places. In the condenser, the location of the non-condensable gas is formed on the side surface where the bleeding is easy by arranging the baffle plate 17 and forming the refrigerant vapor flow path.

FIGS. 17A to 17D are diagrams showing an embodiment in which the refrigerant inlet 11 _IN is arranged on the side surface of the can body 11, and are side sectional views of the condenser 2.
In the embodiment shown in FIGS. 17A to 17D, the heat transfer tube group 14 includes an upper heat transfer tube group 14U and a lower heat transfer tube group 14L, and the refrigerant inlet _11IN is a side surface (side portion) of the can body 11. Is provided. A pair of upper and lower baffle plates 17, 17 are provided near the upper and lower ends of the inside of the can body 11 at a position far from the refrigerant inlet 11 _IN , and bleed tubes 18, 18 are provided near the pair of upper and lower baffle plates 17, 17. . That is, each extraction pipe 18 is provided downstream of the baffle plate 17 in the flow direction of the refrigerant gas (refrigerant vapor). The baffle plate 17 and the bleeding tube 18 may be paired up and down, but the effect can be exerted by one of the first pass side.

In the embodiment shown in FIGS. 17A to 17D, the arrangement of the heat transfer tubes 13 is adjusted to form the refrigerant vapor passage 21 so that the refrigerant vapor flows toward the vicinity of the extraction tube 18. The refrigerant vapor flow path 21 is one in the horizontal direction (FIG. 17A), a plurality in the horizontal direction (FIG. 17B), one in the horizontal direction, and a plurality in the diagonal direction (FIG. 17C). , (D)). By forming the refrigerant flow path, the refrigerant vapor is supplied to the inside of the heat transfer tube group, and the non-condensable gas, which tends to stay in the heat transfer tube group, is intentionally collected by the flow of the vapor at a place where it is easily extracted. With such a configuration, the following two effects can be obtained.
(1) Refrigerant vapor can be supplied to the inside of the heat transfer tube group, and the performance of each heat transfer tube can be sufficiently exhibited.
(2) The non-condensable gas flows near the bleeding place intentionally provided, and bleeding is facilitated.
As described above, by installing the baffle plate 17 and forming the refrigerant vapor flow path 21 in the condenser, the place where the non-condensable gas stays is formed on the side surface (side portion) of the can body 11 where the gas is easily extracted. The non-condensable gas can be easily extracted by the extraction tube 18.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and may be embodied in various different forms within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 1 Turbo compressor 2 Condenser 3 Evaporator 4 Economizer 5 Refrigerant piping 8 Flow path 11 Can body 11 _IN refrigerant inlet 12 Tube plate 13 Heat transfer tube 14 Heat transfer tube group 14L Lower heat transfer tube group 14U Upper heat transfer tube group 15L Header part 15R Header Part 16 Partition plate 17, 20 Baffle plate 18, 18-1, 18-2, 18-3 Extraction pipe 18h Extraction hole 21 Refrigerant vapor flow path G Refrigerant gas

Claims (9)

A can body, a tube sheet for closing both ends of the can body, and a heat transfer tube group disposed in the can body, and cooling gas flowing into the can body and cooling flowing through the heat transfer tube group. In a condenser for a compression refrigerator that performs heat exchange with water to condense refrigerant gas,
A baffle plate is provided between the inner wall of the can body and the heat transfer tube group, forming a place where non-condensable gas stays by the baffle plate,
In a place where the non-condensable gas stays, an bleed pipe for bleeding the non-condensable gas is provided,
The condenser according to claim 1, wherein the extraction tube is located below the baffle plate.   2. The condenser according to claim 1, wherein the baffle plate is disposed so as to cover a predetermined number of heat transfer tubes from outside the heat transfer tube group. 3.   The condenser according to claim 1 or 2, wherein the extraction pipe is provided near an inlet of the first-pass heat transfer tube group or near an outlet of the first-pass heat transfer tube group.   The condenser according to claim 1 or 2, wherein the bleed tube is provided at a location of the can body far from the refrigerant vapor inlet of the condenser.   The compression type according to any one of claims 1 to 4, wherein the heat transfer tube group is arranged in a plurality of stages in a vertical direction, and the baffle and the bleeding tube are provided on a lowermost heat transfer tube group side. Condenser for refrigerator.   The condenser for a compression refrigerator according to any one of claims 1 to 5, wherein the bleed pipe is a short pipe having at least one bleed hole.   The condenser for a compression refrigerator according to any one of claims 1 to 5, wherein the extraction tube comprises a header tube having a plurality of extraction holes formed at intervals.   8. A flow path through which a refrigerant gas easily flows by making a part of a gap between an inner wall of the can body and the heat transfer tube group larger than other gap parts. 9. The condenser for a compression refrigerator according to claim 1.   9. The heat transfer tubes of the heat transfer tube group are arranged in a staggered manner, and at least one row of the heat transfer tubes arranged in a staggered arrangement is removed to form a gap, and the gap serves as a flow path for a refrigerant gas. The condenser for a compression refrigerator according to any one of the preceding claims.

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