CN107655238B

CN107655238B - Condenser for compression type refrigerator

Info

Publication number: CN107655238B
Application number: CN201710550083.5A
Authority: CN
Inventors: 山田宏幸
Original assignee: Ebara Refrigeration Equipment and Systems Co Ltd
Current assignee: Ebara Refrigeration Equipment and Systems Co Ltd
Priority date: 2016-07-25
Filing date: 2017-07-07
Publication date: 2021-06-22
Anticipated expiration: 2037-07-07
Also published as: JP2018017408A; CN107655238A; JP6670197B2; CN207019348U

Abstract

The invention provides a condenser for a compression type refrigerator, which can concentrate non-condensable gas at a position easy to extract and discharge the non-condensable gas all the time, and can maintain the condensation performance of a refrigerant. The condenser for a compression refrigerator is provided with: a canister (11); tube plates (12, 12) for closing both ends of the canister (11); and a heat transfer pipe group (14) disposed in the tank (11) for condensing the gaseous refrigerant by exchanging heat between the gaseous refrigerant introduced into the tank (11) and cooling water flowing through the heat transfer pipe group (14), wherein a baffle (17) is provided between the inner wall of the tank (11) and the heat transfer pipe group (14), a portion where the non-condensable gas stays is formed by the baffle (17), an extraction pipe (18) for extracting the non-condensable gas is provided at the portion where the non-condensable gas stays, and the extraction pipe (18) is positioned below the baffle (17).

Description

Condenser for compression type refrigerator

Technical Field

The present invention relates to a condenser for a compression type refrigerator, which condenses a high-pressure gas refrigerant discharged from a compressor by exchanging heat with cooling water (cooling fluid).

Background

Compression refrigerators such as centrifugal refrigerators used in refrigeration and air-conditioning apparatuses and the like have conventionally been configured by a closed system in which a refrigerant is sealed, and an evaporator that takes heat from cold water (a cooled fluid) and evaporates the refrigerant to exhibit a refrigeration effect, a compressor that compresses the gaseous refrigerant evaporated by the evaporator to form a high-pressure gaseous refrigerant, a condenser that cools the high-pressure gaseous refrigerant with cooling water (a cooling fluid) to condense the high-pressure gaseous refrigerant, and an expansion valve (an expansion mechanism) that decompresses and expands the condensed refrigerant are connected by refrigerant pipes.

For example, a condenser used in a compression refrigerator such as a centrifugal refrigerator is configured by disposing a heat transfer pipe group in a space formed by a cylindrical tank and tube plates provided at both ends of the tank, the heat transfer pipe group being formed by arranging a plurality of heat transfer pipes in a staggered manner or the like. The high-pressure gaseous refrigerant discharged from the compressor flows into the space from the upper portion of the canister, exchanges heat with the cooling water flowing in the heat transfer pipe while passing through the heat transfer pipe group, is cooled, and is condensed.

Patent document 1: japanese patent laid-open publication No. 2016-

The refrigerant used in a compression refrigerator such as a centrifugal refrigerator is classified into a low-pressure refrigerant such as R123 and a high-pressure refrigerant such as R134 a. A centrifugal refrigerator using a low-pressure refrigerant has a portion where the internal pressure of the device is lower than the atmospheric pressure during operation. Therefore, air or the like may leak from a connection portion of a pipe or the like into the apparatus. Since air is not condensed at the operating temperature of the refrigerator, it is trapped in the condenser. If a non-condensable gas such as air is present, there is a problem that the condensing performance of the condenser is lowered. Low pressure refrigerant centrifugal chillers require the withdrawal of non-condensable gases. Normally, the air is extracted from the upper space of the condenser. However, during operation, there is a problem that the vapor flows in the upper space of the condenser, and the air flows into the heat transfer tube group together with the vapor and is accumulated in the heat transfer tube group, so that the air cannot be easily drawn out.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a condenser for a compression type refrigerator, which can collect a non-condensable gas at a portion where air is easily drawn and can always discharge the non-condensable gas, and which can maintain a condensing performance of a refrigerant.

In order to achieve the above object, a condenser for a compression type refrigerator according to the present invention includes: a canister; a tube plate for sealing two ends of the tank; and a heat transfer pipe group disposed in the tank, wherein the condenser for a compression type refrigerant condenses the gaseous refrigerant by exchanging heat between the gaseous refrigerant introduced into the tank and the cooling water flowing through the heat transfer pipe group, wherein a baffle is provided between an inner wall of the tank and the heat transfer pipe group, a portion where the non-condensable gas stays is formed by the baffle, and an exhaust pipe for exhausting the non-condensable gas is provided at the portion where the non-condensable gas stays, and the exhaust pipe is located below the baffle.

According to a preferred embodiment of the present invention, the baffle is disposed so as to cover a predetermined number of heat transfer pipes from the outside of the heat transfer pipe group.

The baffle covers at least one heat transfer pipe, whereby inflow of refrigerant vapor to a portion where the non-condensable gas stays is suppressed, and the non-condensable gas easily stays. On the other hand, the maximum width of the baffle may be determined to cover the number of heat transfer tubes to such an extent that condensation of the refrigerant is not inhibited, depending on the product specifications, for example, when the interval between the heat transfer tubes is wide or when the heat transfer tubes are large in a large facility.

According to a preferred embodiment of the present invention, the exhaust pipe is provided in the vicinity of an inlet of the first passage heat transfer pipe group or in the vicinity of an outlet of the first passage heat transfer pipe group for the coolant.

According to a preferred embodiment of the present invention, the suction pipe is provided at a position of the canister which is distant from the refrigerant vapor inflow port of the condenser.

According to a preferred embodiment of the present invention, the heat exchanger tube group is arranged in a plurality of layers in the vertical direction, and the baffle and the air extraction pipe are provided on the heat exchanger tube group side of the lowermost layer.

A preferred embodiment of the method according to the invention is characterized in that the suction pipe is formed by a short pipe with at least one suction opening.

According to a preferred embodiment of the present invention, the suction pipe is constituted by a manifold having a plurality of suction holes formed at intervals.

According to a preferred embodiment of the present invention, a part of the gap between the inner wall of the tank and the heat transfer pipe group is formed to be wider than other gap portions, thereby forming a flow path through which the gas refrigerant easily flows.

According to a preferred embodiment of the present invention, the heat transfer tubes of the heat transfer tube group are arranged in a staggered manner, and at least 1 row of the heat transfer tubes arranged in a staggered manner is removed to form a gap, and the gap is used as a flow path for the gaseous refrigerant.

The present invention can achieve the following effects.

(1) The non-condensable gas can be collected at a part easy to be extracted and can be effectively extracted.

(2) Since the non-condensable gas can be discharged at all times, the condensing performance of the condenser can be maintained.

Drawings

Fig. 1 is a schematic view showing a centrifugal refrigerator including a condenser according to the present invention.

Fig. 2 is a sectional view showing an example of the overall configuration of the condenser shown in fig. 1.

Fig. 3 is a diagram showing a condenser according to the first embodiment, and is a side sectional view of the condenser.

Fig. 4 is a diagram illustrating a condenser according to the first embodiment, and is a front view of the condenser.

Fig. 5 (a) and (b) are sectional views of the exhaust pipe shown in fig. 3 and 4.

Fig. 6 is a diagram showing a condenser according to a second embodiment, and is a side sectional view of the condenser.

Fig. 7 is a diagram illustrating a condenser according to a second embodiment, and is a front view of the condenser.

Fig. 8 is a perspective view of the exhaust tube shown in fig. 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 showing a condenser according to the third embodiment, and is a front view of the condenser.

Fig. 11 is a diagram showing a condenser according to the fourth embodiment, and is a side sectional 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 illustrating a condenser according to the fifth embodiment, and is a side cross-sectional view of the condenser.

Fig. 14 is a diagram showing the condenser 2 according to the sixth embodiment, and is a side sectional view of the condenser.

Fig. 15 is a diagram showing a condenser according to the seventh embodiment, and is a side sectional view of the condenser.

Fig. 16 is a diagram showing a condenser according to the eighth embodiment, and is a side sectional view of the condenser.

Fig. 17 (a) to (d) are diagrams showing embodiments in which the refrigerant inlet is disposed on the side surface of the tank, and are side sectional views of the condenser.

Description of reference numerals:

1: a centrifugal compressor; 2: a condenser; 3: an evaporator; 4: an economizer (economizer); 5: a refrigerant pipe; 8: a flow path; 11: a canister; 11_IN: a refrigerant inlet; 12: a tube sheet; 13: a heat conducting pipe; 14: a heat transfer tube set; 14L: a lower heat transfer tube set; 14U: an upper heat transfer tube set; 15L: a header section; 15R: a header section; 16: a partition plate; 17. 20: a baffle plate; 18. 18-1, 18-2, 18-3: an air exhaust pipe; 18 h: an air exhaust hole; 21: a refrigerant vapor flow path; g: a gaseous refrigerant.

Detailed Description

Embodiments of a condenser for a compression type refrigerator according to the present invention will be described below with reference to fig. 1 to 17. In fig. 1 to 17, the same or corresponding components are denoted by the same reference numerals, and redundant description thereof is omitted. In the present embodiment, a centrifugal refrigerator using a centrifugal compressor is shown as an example of a compression type refrigerator, but a centrifugal refrigerator using a screw type, reciprocating type, scroll type or the like compressor may be used.

Fig. 1 is a schematic view showing a centrifugal refrigerator including a condenser according to the present invention. As shown in fig. 1, a centrifugal refrigerator includes: a centrifugal compressor 1, the centrifugal compressor 1 compressing a refrigerant; a condenser 2 for condensing the compressed gaseous refrigerant by cooling the gaseous refrigerant with cooling water (cooling fluid); an evaporator 3 that takes heat from cold water (cooled fluid) and evaporates a refrigerant to exhibit a refrigeration effect; and an economizer 4 as an intercooler, the economizer 4 being disposed between the condenser 2 and the evaporator 3, and the centrifugal refrigerator being configured by connecting the respective devices by a refrigerant pipe 5 through which a refrigerant circulates. A low-pressure refrigerant such as R123 is used as the refrigerant.

In the embodiment shown in fig. 1, the centrifugal compressor 1 is constituted by a multistage centrifugal compressor. The centrifugal compressor 1 is connected to the economizer 4 via a refrigerant pipe 5, and the gaseous refrigerant separated by the economizer 4 is introduced into an intermediate portion (in this example, a portion between the first stage and the second stage) of a multi-stage compression stage (in this example, two stages) of the multi-stage centrifugal compressor.

In the refrigeration cycle of the centrifugal refrigerator configured as shown in fig. 1, a refrigerant circulates through the centrifugal compressor 1, the condenser 2, the evaporator 3, and the economizer 4, cold water is produced by the evaporator 3, and heat from the evaporator 3 introduced into the refrigeration cycle and heat corresponding to work of the centrifugal compressor 1 supplied from the compressor motor are released to the cooling water supplied to the condenser 2 in accordance with a load. On the other hand, the gaseous refrigerant separated by the economizer 4 is introduced into the intermediate portion of the multi-stage compression stage of the centrifugal compressor 1, and is merged with the gaseous refrigerant from the first-stage compressor and then compressed by the second-stage compressor. According to the two-stage compression single-stage economizer cycle system, since the refrigeration effect portion by the economizer 4 is added, the refrigeration effect increases accordingly, and the refrigeration effect can be more efficiently achieved as compared with the case where the economizer 4 is not provided.

Fig. 2 is a sectional view showing an example of the overall configuration of the condenser 2 shown in fig. 1. As shown in fig. 2, the condenser 2 is configured by disposing a heat transfer pipe group 14 in a space formed by a cylindrical tank 11 and

tube plates

12, 12 provided at both ends of the tank 11, the heat transfer pipe group 14 being formed by arranging a plurality of heat transfer pipes 13 in a staggered manner. The gaseous refrigerant is introduced from a refrigerant inlet 11 located at the upper portion of the canister 11_INFlows into the heat pipe group 14, passes through the heat pipe group 14, and is cooled and condensed by heat exchange with cooling water flowing in the heat pipe while passing through the heat pipe group 14. The condensed liquid (liquid refrigerant) after condensation is discharged from a refrigerant outlet 11 provided at the bottom of the canister 11_OUTAnd (4) flowing out. At the refrigerant inlet 11_INIs provided with an inlet baffle 19 directly below. The heat transfer pipe 13 is formed asCooling water (cooling fluid) can be circulated inside the tank, and the cooling water (cooling fluid) can extend in the longitudinal direction of the tank 11.

Header portions

15R and 15L are connected to the

tube plates

12 and 12, respectively. The header 15L is divided into upper and lower sections by partition plates 16, and the header 15L is provided with a cooling water inlet 15_INAnd a cooling water outlet 15_OUT。

Fig. 2 illustrates a 2-pass heat transfer tube set. That is, the heat transfer pipe group 14 including the plurality of heat transfer pipes 13 is formed by the cooling water inlet 15_INAn upper layer heat conduction pipe group 14U communicated with the cooling water outlet 15_OUTAnd a lower heat transfer pipe group 14L communicating with each other. The cooling water is supplied from the cooling water inlet 15 of the header 15L_INFlows into the upper heat transfer tube group 14U, turns around the header 15R, flows through the lower heat transfer tube group 14L, and flows through the cooling water outlet 15_OUTAnd (4) flowing out. Further, as shown in the figure, a cooling water inlet 15 is provided_INAt the upper side, cooling water outlet 15_OUTThe type located at the lower side is called an upper inlet lower outlet type (upper IN lower OUT), and the cooling water inlet 15 is formed_INAt the lower side, cooling water outlet 15_OUTThe type located on the upper side is called a lower-IN upper-OUT type (lower IN upper OUT).

Fig. 3 and 4 are views showing the condenser 2 according to the first embodiment, fig. 3 is a side sectional 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 including a 4-pass heat transfer pipe group, and is a top-in bottom-out type condenser. In the case of the top-bottom outlet type condenser, the non-condensable gas tends to remain 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 layer heat transfer tube group 14U is divided into the left and right, and is composed of the upper layer left heat transfer tube group 14UL and the upper layer right heat transfer tube group 14 UR. The first passage of the cooling water may be the upper left heat transfer pipe group 14UL or the upper right heat transfer pipe group 14 UR. The lower layer heat conduction pipe group 14L is also divided into a lower layer left heat conduction pipe group 14LL and a lower layer right heat conduction pipe group 14 LR. A pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at a position slightly above the upper left heat exchanger tube group 14UL and the upper right heat exchanger tube group 14 UR. Each baffle 17 is formed of an elongated thin plate-like member, and extends in the longitudinal direction of the can 11 between the

tube plates

12, 12. When the extraction pipe is a short pipe, the baffle 17 may be provided not over the entire length thereof but only in a part near the extraction pipe 18. The pair of left and

right baffle plates

17, 17 are arranged: the heat exchanger tubes 13 extend horizontally inward from the inner wall of the tank 11 and cover a predetermined number of heat exchanger tubes 13 located on the end side of the uppermost heat exchanger tube row of the upper left heat exchanger tube group 14UL and the upper right heat exchanger tube group 14 UR. The baffle 17 covers at least one heat transfer pipe 13, thereby suppressing the inflow of the refrigerant vapor to the portion where the non-condensable gas stays, and facilitating the stagnation of the non-condensable gas. On the other hand, the maximum width of the baffle may be determined to cover the number of heat transfer tubes to such an extent that condensation of the refrigerant is not inhibited, depending on the product specifications, for example, when the interval between the heat transfer tubes is wide or when the heat transfer tubes are large in a large facility.

Extraction pipes

18, 18 for extracting non-condensable gas are provided below the pair of left and

right baffle plates

17, 17. The baffle 17 and the air extraction duct 18 may be provided in a pair on the left and right, but may be provided only on one side of the first passage.

As shown in fig. 4, the extraction pipes 18 are provided at both ends of the canister 11.

Fig. 5 (a) and (b) are sectional views of the exhaust pipe 18 shown in fig. 3 and 4. The exhaust pipe 18 may be a simple pipe with both ends open, but according to a preferred embodiment, as shown in fig. 5 (a), the exhaust pipe 18 is formed of a cylindrical pipe, the front end portion of which is closed, the rear end portion of which has an opening 18a, and the lower portion on the front end portion side of which has an exhaust hole 18 h. As shown in fig. 5 (b), the exhaust tube 18 may be a short tube in which the front end of the tube is cut into a slant surface. The cutting surface faces the lower side. With this configuration, the liquid refrigerant is less likely to flow into the suction pipe, and the gas is easily sucked. The front end portion side of the extraction pipe 18 is inserted into the canister 11, thereby extracting the non-condensable gas in the canister 11 through the extraction hole 18h, and discharging the extracted non-condensable gas to the purge tank (not shown) from the opening 18a at the rear end portion.

In the condenser 2 according to the first embodiment, as shown in fig. 3, the inner wall of the tank 11 is in phase contact with the inner wall of the tankA pair of left and right baffles 17, 17 are fixed slightly above the upper left heat transfer pipe group 14UL and the upper right heat transfer pipe group 14UR, and

air extraction pipes

18, 18 are provided below the pair of left and right baffles 17, 17. As shown in fig. 3, the gaseous refrigerant G is introduced from the refrigerant inlet 11 located at the upper portion of the canister 11_INFlows into the upper left heat transfer tube set 14UL and the upper right heat transfer tube set 14 UR. A part of the gaseous refrigerant (refrigerant vapor) having flowed 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 gaseous refrigerant flows into the lower heat transfer tube group 14L. From the refrigerant inlet 11_INA part of the gas refrigerant G flowing in passes through the gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR and flows toward the lower left heat transfer tube group 14L, and a part of the gas refrigerant 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 flows toward the gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14 UR.

On the other hand, since the pair of left and

right baffles

17 and 17 are provided 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 gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14UR are blocked, the gas refrigerant is hard to flow downward through the gaps, and the heat transfer tubes near the lower sides of the baffles have sufficient condensation capacity. The supply of the gaseous refrigerant to the heat transfer pipe here is supplied by the following gaseous refrigerant: a gaseous refrigerant flowing from the inside of the upper heat transfer tube group 14U to a gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and a gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14 UR; and the gaseous refrigerant flowing from 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 through the gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14 UR. Thus, the flow of the gas refrigerant G flowing from above is blocked by the pair of left and

right baffles

17 and 17, and the gas refrigerant flows from the inside of the heat transfer tube group and the lower side of the heat transfer tube group toward the heat transfer tube in the vicinity below the baffles. The gaseous refrigerant (refrigerant vapor) that has flowed to the vicinity below the baffle condenses on the surface of the heat transfer pipe, and the non-condensable gas mixed in the gaseous refrigerant tends to accumulate. Therefore, the non-condensable gas stays below the respective baffles 17, and therefore, the accumulated non-condensable gas is extracted by the extraction pipe 18, and the extracted non-condensable gas is discharged to a purge tank (not shown).

Fig. 6 and 7 are views showing a condenser 2 according to a 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 including a 4-pass heat transfer pipe group, and is a top-in bottom-out type condenser as in the first embodiment. In the second embodiment, as shown in fig. 6, the upper layer heat transfer tube group 14U is divided into left and right, and is composed of the upper layer left heat transfer tube group 14UL and the upper layer right heat transfer tube group 14 UR. The lower layer heat conduction pipe group 14L is also divided into a lower layer left heat conduction pipe group 14LL and a lower layer right heat conduction pipe group 14 LR. A pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at a position slightly above the upper left heat exchanger tube group 14UL and the upper right heat exchanger tube group 14 UR. Each baffle 17 is formed of an elongated thin plate-like member and extends in the longitudinal direction of the can 11 between the

tube plates

12, 12. The pair of left and

right baffle plates

17, 17 are arranged: the heat exchanger tubes 13 extend horizontally inward from the inner wall of the tank 11 and cover a predetermined number of heat exchanger tubes 13 located on the end side of the uppermost heat exchanger tube row of the upper left heat exchanger tube group 14UL and the upper right heat exchanger tube group 14 UR.

Extraction pipes

right baffle plates

As shown in fig. 7, the exhaust pipe 18 is a cylindrical pipe extending in the longitudinal direction of the canister 11.

Fig. 8 is a perspective view of the exhaust tube 18 shown in fig. 6 and 7. As shown in fig. 8, the air suction pipe 18 is formed of a long cylindrical pipe, both ends of which are closed, and a lower portion of which has a plurality of air suction holes 18h formed at intervals. The air extraction pipe 18 includes an exhaust pipe 18e formed of a short pipe at a central portion thereof. The extraction duct 18 is formed: by inserting a long cylindrical pipe into the tank 11, the non-condensable gas in the tank 11 is extracted through the plurality of extraction holes 18h, and the extracted non-condensable gas is discharged to a purge tank (not shown) through the exhaust pipe 18 e.

In the condenser 2 according to the second embodiment, as shown in fig. 6, a pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at a position slightly above the upper left heat exchanger tube group 14UL and the upper right heat exchanger tube group 14UR, and

air extraction pipes

18, 18 are provided below the pair of left and right baffles 17, 17. As shown in fig. 6, the gaseous refrigerant G is introduced from the refrigerant inlet 11 located at the upper portion of the canister 11_INFlows into the upper left heat transfer tube set 14UL and the upper right heat transfer tube set 14 UR. A part of the gaseous refrigerant (refrigerant vapor) having flowed 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 gaseous refrigerant flows into the lower heat transfer tube group 14L. From the refrigerant inlet 11_INThe part of the gas refrigerant G having flowed in passes through the gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR and then flows toward the lower left heat transfer tube group 14L, and the part of the gas refrigerant 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 flows toward the gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14 UR.

On the other hand, since the pair of left and

right baffles

17 and 17 are provided 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 gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14UR are blocked, the gas refrigerant is hard to flow downward through the gaps, and the heat transfer tubes near the lower sides of the baffles have sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer pipe here is supplied by the following gaseous refrigerant: a gaseous refrigerant flowing from the inside of the upper heat transfer tube group 14U to a gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and a gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14 UR; and the gaseous refrigerant that flows 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 then flows through the gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL and the gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14 UR. Thus, the flow of the gas refrigerant G flowing from above is blocked by the pair of left and

right baffles

17 and 17, and the flow of the gas refrigerant is formed from the inside of the heat transfer tube group and the lower side of the heat transfer tube group toward the heat transfer tube in the vicinity below the baffles. The gaseous refrigerant (refrigerant vapor) that has flowed to the vicinity below the baffle condenses on the surface of the heat transfer pipe, and the non-condensable gas mixed in the gaseous refrigerant tends to accumulate. Therefore, the non-condensable gas is accumulated below each baffle 17, and therefore, the non-condensable gas is extracted by the extraction pipe 18, and the extracted non-condensable gas is discharged to the purge tank.

Fig. 9 and 10 are views showing a condenser 2 according to a third embodiment, fig. 9 is a side sectional 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 including a 4-pass heat transfer pipe set, and is of a lower inlet/outlet type (lower IN and upper OUT). In the case of the condenser of the lower inlet/outlet type, the non-condensable gas tends to remain 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 layer heat transfer tube group 14U is divided into left and right, and is composed of an upper layer left heat transfer tube group 14UL and an upper layer right heat transfer tube group 14 UR. The lower layer heat conduction pipe group 14L is also divided into a lower layer left heat conduction pipe group 14LL and a lower layer right heat conduction pipe group 14 LR. A pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at positions slightly above the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14 LR. Each baffle 17 is formed of an elongated thin plate-like member and extends in the longitudinal direction of the can 11 between the

tube plates

12, 12. In the case where the extraction duct is a short pipe, the baffle 17 may be provided not over the entire length but only in a part near the extraction duct 18. The pair of left and

right baffle plates

17, 17 are arranged: the heat transfer tubes 13 extend horizontally inward from the inner wall of the tank 11 and cover a predetermined number of heat transfer tubes 13 located on the end side of the uppermost heat transfer tube row of the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14 LR.

Tubular extraction pipes

right baffle plates

As shown in fig. 10, the exhaust pipes 18 are provided at both ends of the canister 11. The exhaust pipe 18 is formed in the same structure as the exhaust pipe 18 shown in fig. 5.

In the condenser 2 according to the third embodiment, as shown in fig. 9, a pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at a position slightly above the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and

air extraction tubes

18, 18 are provided below the pair of left and right baffles 17, 17. As shown in fig. 9, the gaseous refrigerant G is introduced from the refrigerant inlet 11 located at the upper portion of the canister 11_INFlows into the upper left heat transfer tube set 14UL and the upper right heat transfer tube set 14 UR. A part of the gaseous refrigerant (refrigerant vapor) having flowed 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 gaseous refrigerant flows into the lower heat transfer tube group 14L. In addition, from the refrigerant inlet 11_INThe part of the gas refrigerant G flowing in passes through the gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, the gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL, and the gap between the inner wall of the tank 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 14 LR. Further, a part of the gas refrigerant G passes through a gap between the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and passes through a lower portion of the lower heat transfer tube group 14LFlows into a gap between the inner wall of the tank 11 and the lower left heat transfer tube group 14LL and a gap between the inner wall of the tank 11 and the lower right heat transfer tube group 14 LR.

On the other hand, since the pair of left and

right baffles

17 and 17 are provided above the uppermost heat transfer tube row of the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, a gap between the inner wall of the tank 11 and the lower left heat transfer tube group 14LL and a gap between the inner wall of the tank 11 and the lower right heat transfer tube group 14LR are blocked, so that the gas refrigerant is hard to flow downward through the gaps, and the heat transfer tubes near the lower sides of the baffles have sufficient condensing ability. The supply of the gaseous refrigerant to the heat transfer pipe here is supplied by the following gaseous refrigerant: gaseous refrigerant flowing from the inside of the lower heat transfer tube group 14L to a gap between the inner wall of the tank 11 and the lower left heat transfer tube group 14LL and a gap between the inner wall of the tank 11 and the lower right heat transfer tube group 14 LR; and a gas refrigerant that passes through the lower portion of the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and flows through the gap between the inner wall of the tank 11 and the lower left heat transfer tube group 14LL and the gap between the inner wall of the tank 11 and the lower right heat transfer tube group 14 LR. Thus, the flow of the gas refrigerant G flowing from above is blocked by the pair of left and

right baffles

17 and 17, and the flow of the gas refrigerant is formed from the inside of the heat transfer tube group and the lower side of the heat transfer tube group toward the heat transfer tube in the vicinity below the baffles. The gaseous refrigerant (refrigerant vapor) that has flowed to the vicinity below the baffle condenses on the surface of the heat transfer pipe, and the non-condensable gas mixed in the gaseous refrigerant tends to accumulate. Therefore, the non-condensable gas is accumulated below each baffle 17, and therefore, the accumulated non-condensable gas is extracted by the extraction pipe 18, and the extracted non-condensable gas is discharged to the purge tank together with the gaseous refrigerant.

Fig. 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 including a 4-pass heat transfer pipe group, and is a downward-in and upward-out type condenser as in the third embodiment. In the fourth embodiment, as shown in fig. 11, the upper layer heat transfer tube group 14U is divided into left and right, and is composed of an upper layer left heat transfer tube group 14UL and an upper layer right heat transfer tube group 14 UR. The lower layer heat conduction pipe group 14L is also divided into a lower layer left heat conduction pipe group 14LL and a lower layer right heat conduction pipe group 14 LR. A pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at positions slightly above the lower left heat exchanger tube group 14LL and the lower right heat exchanger tube group LR. Each baffle 17 is formed of an elongated thin plate-like member and extends in the longitudinal direction of the can 11 between the

tube plates

12, 12. The pair of left and

right baffle plates

Extraction pipes

right baffle plates

As shown in fig. 12, the exhaust pipe 18 is a cylindrical pipe extending in the longitudinal direction of the canister 11. The exhaust pipe 18 is formed in the same structure as the exhaust pipe 18 shown in fig. 8.

In the condenser 2 according to the fourth embodiment, as shown in fig. 11, a pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at a position slightly above the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and

air extraction tubes

18, 18 are provided below the pair of left and right baffles 17, 17. As shown in fig. 11, the gaseous refrigerant G is introduced from the refrigerant inlet 11 located at the upper portion of the canister 11_INFlows into the upper left heat transfer tube set 14UL and the upper right heat transfer tube set 14 UR. A part of the gaseous refrigerant (refrigerant vapor) having flowed 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 gaseous refrigerant flows into the lower heat transfer tube group 14L. In addition, from the refrigerant inlet 11_INA part of the gas refrigerant G flowing in passes through a gap between the upper left heat transfer tube group 14UL and the upper right heat transfer tube group 14UR, a gap between the inner wall of the tank 11 and the upper left heat transfer tube group 14UL, and a gap between the inner wall of the tank 11 and the upper right heat transfer tube group 14UR,flows into the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14 LR. Further, a part of the gas refrigerant G passes through a gap between the lower left heat transfer tube group 14LL and the lower right heat transfer tube group 14LR, and flows from below the lower heat transfer tube group 14L to a gap between the inner wall of the tank 11 and the lower left heat transfer tube group 14LL and a gap between the inner wall of the tank 11 and the lower right heat transfer tube group 14 LR.

On the other hand, since the pair of left and

right baffles

17 and 17, and the flow of the gas refrigerant is formed from the inside of the heat transfer tube group and the lower side of the heat transfer tube group toward the heat transfer tube in the vicinity below the baffles. The gaseous refrigerant (refrigerant vapor) that has flowed to the vicinity below the baffle condenses on the surface of the heat transfer pipe, and the non-condensable gas mixed in the gaseous refrigerant tends to accumulate. Therefore, the non-condensable gas is accumulated below each baffle 17, and therefore, the accumulated non-condensable gas is extracted by the extraction 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 cross-sectional view of the condenser 2. The condenser 2 according to the fifth embodiment is a condenser including a heat transfer tube group having 2 passages, and is a downward-in and upward-out type condenser. In the case of the condenser of the lower inlet/outlet type, the non-condensable gas is likely to remain on the heat pipe group side of the lower layer where the cooling water temperature is low. In the fifth embodiment, as shown in fig. 13, the heat transfer pipe group 14 including the plurality of heat transfer pipes 13 is composed of a lower heat transfer pipe group 14L communicating with the coolant inlet and an upper heat transfer pipe group 14U communicating with the coolant outlet.

In the fifth embodiment, since the extraction pipes 18 are provided in the upper layer, the middle layer, and the lower layer of the condenser 2, they are distinguished from each other by using the

labels

1, 2, and 3. That is, in the fifth embodiment: at the refrigerant inlet 11 in the upper part of the canister_INA baffle 20 is provided at a position below and directly above the upper heat transfer tube group 14U, whereby the refrigerant inlet 11 is provided with a baffle 20_INThe gas refrigerant G having flowed in flows into the upper heat transfer tube group 14U after hitting the baffle 20. Although a part of the gaseous refrigerant also flows into the lower surface side of the baffle 20, the non-condensable gas is likely to remain on the lower surface side of the baffle 20. Therefore, the gas extraction pipe 18-1 for extracting the non-condensable gas is provided on the lower surface side of the baffle plate 20. The exhaust pipe 18-1 is formed in the same structure as the exhaust pipe 18 shown in fig. 5, but the exhaust hole 18h is located on the upper surface side of the cylindrical pipe.

In addition, an air exhaust pipe 18-2 is provided in a gap between the upper heat transfer pipe group 14U and the lower heat transfer pipe group 14L. A pair of left and right baffles 17, 17 are fixed to the inner wall of the tank 11 at positions near the lowermost layer of the lower heat conduction pipe group 14L. Each baffle 17 is formed of an elongated thin plate-like member and extends in the longitudinal direction of the can 11 between the

tube plates

12, 12. In the case where the extraction duct is a short pipe, the baffle 17 may be provided not over the entire length but only in a part near the extraction duct 18. Each baffle 17 extends horizontally inward from the inner wall of the tank 11, and is disposed adjacent to the end of the lowermost heat transfer tube row in the lower heat transfer tube group 14L. An exhaust pipe 18-3 for exhausting non-condensable gas is provided below the lower heat transfer pipe group 14L. The plurality of air extraction pipes 18-2 and 18-3 are provided at intervals in the longitudinal direction of the canister 11 as in fig. 4 (not shown). The suction pipes 18-1, 18-2, 18-3 are formed in the same structure as the suction pipe 18 shown in fig. 5.

In the condenser 2 according to the fifth embodiment, as shown in fig. 13, the gaseous refrigerant G flows from the refrigerant inlet 11 located at the upper portion of the tank 11_INFlows into the upper heat transfer tube group 14U after hitting the baffle 20. Although a part of the gaseous refrigerant also flows into the lower surface side of the baffle 20, the non-condensable gas is likely to remain on the lower surface side of the baffle 20. Therefore, the remaining non-condensable gas is evacuated by the evacuation tube 18-1. A part of the gaseous refrigerant (refrigerant vapor) having flowed into the upper heat transfer tube group 14U is condensed on the surface of the heat transfer tubes, and a part of the uncondensed gaseous refrigerant flows into the lower heat transfer tube group 14L. In addition, from the refrigerant inlet 11_INA part of the gas refrigerant G having flowed in flows into the lower heat transfer tube group 14L through a gap between the inner wall of the tank 11 and the upper heat transfer tube group 14U. Further, a part of the gas refrigerant flows downward through a gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L. However, since the baffle 17 is provided in the vicinity of the lowermost heat transfer tube row of the lower heat transfer tube group 14L, the flow of the gas refrigerant flowing downward through the gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L is blocked by the baffle 17, and the gas refrigerant is less likely to flow downward through the gap. Therefore, although a part of the gas refrigerant G flows into the lower heat transfer tube group 14L and condenses on the surface of the heat transfer tubes, the non-condensable gas mixed in the gas refrigerant tends to remain near the center of the lower heat transfer tube group 14L or below the center. The remaining non-condensable gas is evacuated by the evacuation pipes 18-2 and 18-3.

Fig. 14 is a diagram illustrating the 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 including a heat transfer tube group having 2 passages, and is of a bottom-in and top-out type. In the case of the condenser of the lower inlet/outlet type, the non-condensable gas is likely to remain on the heat pipe group side of the lower layer where the cooling water temperature is low. In the sixth embodiment, as shown in fig. 14, the heat transfer pipe group 14 including the plurality of heat transfer pipes 13 is composed of a lower heat transfer pipe group 14L communicating with the cooling water inlet and an upper heat transfer pipe group 14U communicating with the cooling water outlet.

In the sixth embodiment, the extraction pipes 18 are provided in the upper layer, the middle layer, and the lower layer of the condenser 2, respectively, and therefore, the

labels

1, 2, and 3 are used to distinguish them. That is, in the sixth embodiment: at the refrigerant inlet 11 in the upper part of the canister_INA baffle 20 is provided at a position below and directly above the upper heat transfer tube group 14U, whereby the refrigerant inlet 11 is provided with a baffle 20_INThe gas refrigerant G having flowed in hits the baffle 20, and then flows into the upper heat transfer tube group 14U. Although a part of the gaseous refrigerant also flows into the lower surface side of the baffle 20, the non-condensable gas is likely to remain on the lower surface side of the baffle 20. Therefore, the gas extraction pipe 18-1 for extracting the non-condensable gas is provided on the lower surface side of the baffle plate 20. The exhaust pipe 18-1 is formed in the same structure as the exhaust pipe 18 shown in fig. 5, but the exhaust hole 18h is located on the upper surface side of the cylindrical pipe.

tube plates

12, 12. Each baffle 17 extends horizontally inward from the inner wall of the tank 11, and is disposed adjacent to the end of the lowermost heat transfer tube row in the lower heat transfer tube group 14L. An exhaust pipe 18-3 for exhausting non-condensable gas is provided below the lower heat transfer pipe group 14L. The air extraction pipes 18-2 and 18-3 are constituted by cylindrical pipes (not shown) extending in the longitudinal direction of the canister 11, as in fig. 7. The suction pipes 18-2, 18-3 are formed in the same structure as the suction pipe 18 shown in fig. 8.

In the condenser 2 according to the sixth embodiment, as shown in fig. 14, the gaseous refrigerant G is introduced into the refrigerant inlet 11 from the upper portion of the tank 11_INFlows into the upper heat transfer tube group 14U after hitting the baffle 20. Although a part of the gaseous refrigerant also flows into the lower surface side of the baffle 20, the non-condensable gas is liable to remainOn the lower surface side of the baffle 20. Therefore, the remaining non-condensable gas is evacuated by the evacuation tube 18-1. A part of the gaseous refrigerant (refrigerant vapor) having flowed into the upper heat transfer tube group 14U is condensed on the surface of the heat transfer tubes, and a part of the uncondensed gaseous refrigerant flows into the lower heat transfer tube group 14L. In addition, from the refrigerant inlet 11_INA part of the gas refrigerant G having flowed in flows into the lower heat transfer tube group 14L through a gap between the inner wall of the tank 11 and the upper heat transfer tube group 14U. Further, a part of the gas refrigerant flows downward through a gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L. However, since the baffle 17 is provided in the vicinity of the lowermost heat transfer tube row of the lower heat transfer tube group 14L, the flow of the gas refrigerant flowing downward in the gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L is blocked by the baffle 17, and the gas refrigerant is less likely to flow downward through the gap. Therefore, although a part of the gas refrigerant G flows into the lower heat transfer tube group 14L and condenses on the surface of the heat transfer tubes, the non-condensable gas mixed in the gas refrigerant tends to remain near the center of the lower heat transfer tube group 14L or below the center. The remaining non-condensable gas is evacuated by the evacuation pipes 18-2 and 18-3.

Fig. 15 is a diagram showing 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 having a heat transfer tube group having 2 passages, and is of a bottom-in and top-out type. In the case of the condenser of the lower inlet/outlet type, the non-condensable gas tends to remain on the heat pipe group side of the lower layer where the cooling water temperature is low. In the seventh embodiment, as shown in fig. 15, the heat transfer pipe group 14 including the plurality of heat transfer pipes 13 is composed of a lower heat transfer pipe group 14L communicating with the cooling water inlet and an upper heat transfer pipe group 14U communicating with the cooling water outlet.

In the seventh embodiment, the suction pipe 18 is provided in the lower layer of the condenser 2.

In the seventh embodiment, the gap between the inner wall of the canister 11 and the lower heat conduction pipe group 14L is formed so that one side (the right side in fig. 15) is wide and the other side (the left side in fig. 15) is narrow. Further, a baffle 17 is fixed to the inner wall of the tank 11 on the side (left side in fig. 15) where the gap between the inner wall of the tank 11 and the lower heat conduction pipe group 14L is narrow, at a position slightly above the lower heat conduction pipe group 14L. The baffle 17 is formed of an elongated thin plate-like member and extends in the longitudinal direction of the canister 11 between the

tube plates

12, 12. In the case where the extraction duct is a short pipe, the baffle 17 may be provided not over the entire length but only in a part near the extraction duct 18. The baffle 17 is configured to: the heat transfer tubes 13 extend horizontally inward from the inner wall of the tank 11 and cover a predetermined number of heat transfer tubes 13 located on the end portion side of the uppermost heat transfer tube row in the lower heat transfer tube group 14L. An exhaust pipe 18 for exhausting the non-condensable gas is provided below the baffle 17. The air extraction pipes 18 are provided at both ends (not shown) of the canister 11, as in fig. 4. The exhaust pipe 18 is formed in the same structure as the exhaust pipe 18 shown in fig. 5.

In the condenser 2 according to the seventh embodiment, as shown in fig. 15, the gaseous refrigerant G flows from the refrigerant inlet 11 located at the upper portion of the tank 11_INFlows into and flows into the upper heat transfer tube bank 14U. A part of the gaseous refrigerant (refrigerant vapor) having flowed into the upper heat transfer tube group 14U is condensed on the surface of the heat transfer tubes, and a part of the uncondensed gaseous refrigerant flows into the lower heat transfer tube group 14L. In addition, from the refrigerant inlet 11_INA part of the gas refrigerant G having flowed in flows into the lower heat transfer tube group 14L through the gap between the inner wall of the tank 11 and the upper heat transfer tube group 14U. Further, a part of the gas refrigerant flows downward in a wider gap (right side in fig. 15) between the inner wall of the tank 11 and the lower heat transfer tube group 14L. A part of the gas refrigerant that has flowed to below the lower heat transfer tube group 14L flows into a narrower gap (left side in fig. 15) between the inner wall of the tank 11 and the lower heat transfer tube group 14L.

On the other hand, since the baffle 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 tank 11 and the lower heat transfer tube group 14L is closed, the gas refrigerant is hard to flow downward through the gap, and the heat transfer tubes near the baffle have sufficient condensation capacity. The supply of the gaseous refrigerant to the heat transfer pipe here is supplied by the following gaseous refrigerant: a gas refrigerant flowing from the inside of the lower heat transfer tube group 14L to a narrower gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L; and a gas refrigerant that passes below the lower heat transfer tube group 14L and flows through a narrow gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L. Thus, the flow of the gas refrigerant G flowing from above is blocked by the baffle 17, and the gas refrigerant flows from the inside of the heat transfer tube group and the lower side of the heat transfer tube group toward the heat transfer tubes in the vicinity below the baffle. The gaseous refrigerant (refrigerant vapor) that has flowed to the vicinity below the baffle condenses on the surface of the heat transfer pipe, and the non-condensable gas mixed in the gaseous refrigerant tends to accumulate. Therefore, the non-condensable gas is accumulated below the baffle 17, and therefore, the accumulated non-condensable gas is extracted by the extraction 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 including a heat transfer tube group having 2 passages, and is of a bottom-in and top-out type. In the case of the condenser of the lower inlet/outlet type, the non-condensable gas is likely to remain on the heat pipe group side of the lower layer where the cooling water temperature is low. In the eighth embodiment, as shown in fig. 16, the heat transfer pipe group 14 including the plurality of heat transfer pipes 13 is composed of a lower heat transfer pipe group 14L communicating with the cooling water inlet and an upper heat transfer pipe group 14U communicating with the cooling water outlet.

In the eighth embodiment, the suction pipe 18 is provided below the condenser 2.

In the eighth embodiment, the gap between the inner wall of the canister 11 and the lower heat conduction pipe group 14L is wide on one side (right side in fig. 16) and narrow on the other side (left side in fig. 16). Further, a baffle 17 is fixed to the inner wall of the tank 11 on the side (left side in fig. 16) where the gap between the inner wall of the tank 11 and the lower heat conduction pipe group 14L is narrow, at a position slightly above the lower heat conduction pipe group 14L. The baffle 17 is formed of an elongated thin plate-like member and extends in the longitudinal direction of the canister 11 between the

tube plates

12, 12. The baffle 17 is configured to: the heat transfer tubes 13 extend horizontally inward from the inner wall of the tank 11 and cover a predetermined number of heat transfer tubes 13 located on the end portion side of the uppermost heat transfer tube row in the lower heat transfer tube group 14L. An exhaust pipe 18 for exhausting the non-condensable gas is provided below the baffle 17. The extraction pipe 18 is constituted by a cylindrical pipe (not shown) extending in the longitudinal direction of the canister 11, as in fig. 7. The exhaust pipe 18 is formed in the same structure as the exhaust pipe 18 shown in fig. 8.

In the condenser 2 according to the eighth embodiment, as shown in fig. 16, the gaseous refrigerant G flows from the refrigerant inlet 11 located at the upper portion of the tank 11_INFlows into and flows into the upper heat transfer tube bank 14U. A part of the gaseous refrigerant (refrigerant vapor) having flowed into the upper heat transfer tube group 14U is condensed on the surface of the heat transfer tubes, and a part of the uncondensed gaseous refrigerant flows into the lower heat transfer tube group 14L. In addition, from the refrigerant inlet 11_INA part of the gas refrigerant G having flowed in flows into the lower heat transfer tube group 14L through the gap between the inner wall of the tank 11 and the upper heat transfer tube group 14U. Further, a part of the gas refrigerant flows downward in a wider gap (right side in fig. 16) between the inner wall of the tank 11 and the lower heat transfer tube group 14L. A part of the gas refrigerant that has flowed to below the lower heat transfer tube group 14L flows into a narrower gap (left side in fig. 16) between the inner wall of the tank 11 and the lower heat transfer tube group 14L.

On the other hand, since the baffle 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 tank 11 and the lower heat transfer tube group 14L is closed, the gas refrigerant is hard to flow downward through the gap, and the heat transfer tubes near the baffle have sufficient condensation capacity. The supply of the refrigerant gas to the heat transfer pipe here is supplied by the following gaseous refrigerant: a gas refrigerant flowing from the inside of the lower heat transfer tube group 14L to a narrower gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L; and a gas refrigerant that passes below the lower heat transfer tube group 14L and flows through a narrow gap between the inner wall of the tank 11 and the lower heat transfer tube group 14L. Thus, the flow of the gas refrigerant G flowing from above is blocked by the baffle 17, and the gas refrigerant flows from the inside of the heat transfer tube group and the lower side of the heat transfer tube group toward the heat transfer tubes in the vicinity below the baffle. The gaseous refrigerant (refrigerant vapor) that has flowed to the vicinity below the baffle condenses on the surface of the heat transfer pipe, and the non-condensable gas mixed in the gaseous refrigerant tends to accumulate. Therefore, the non-condensable gas stays below the baffle 17, and therefore, the staying non-condensable gas is extracted by the extraction pipe 18, and the extracted non-condensable gas is discharged to the purge tank.

As described above, in the embodiments shown in fig. 3 to 16, the temperature near the cooling water inlet is the lowest, and the non-condensable gas tends to concentrate in the heat transfer pipe group near this. Therefore, the present invention is configured as follows.

1) A baffle plate 17 is provided between the heat transfer pipe group and the inner wall of the tank, and an air extraction pipe 18 is disposed below the baffle plate 17.

2) The arrangement of the heat transfer pipes is adjusted to form a flow path of the refrigerant vapor so that the vapor flow flows toward the vicinity of the extraction pipe 18.

3) The extraction pipes formed by short pipes are arranged at two ends of the tank barrel. Further, an exhaust pipe formed of a cylindrical pipe extending in the longitudinal direction is provided in the longitudinal direction of the canister.

According to the present invention having the configurations of 1) to 3), the vapor is likely to condense on the surface of the heat transfer pipe at the portions where the cooling water temperature is low, and the non-condensable gas (air or the like) mixed in the refrigerant vapor is likely to accumulate at these portions. In the condenser, the baffle 17 is provided and the refrigerant vapor flow path is formed, so that the non-condensable gas is retained on the side surface which is easy to extract, thereby simplifying the structure of the extraction mechanism.

In FIG. 17, (a) to (d) show the refrigerant inlet 11_INThe embodiment disposed on the side surface of the tank 11 is a side sectional view of the condenser 2.

In the embodiment shown in fig. 17 (a) to (d), the heat conduction pipe group 14 is composed of an upper heat conduction pipe group 14U and a lower heat conduction pipe group 14L, and the refrigerant inlet 11_INIs provided on a side surface (side portion) of the can 11. At a distance from the refrigerant inlet 11_INA pair of upper and

lower baffles

17, 17 are provided at a far position near the upper and lower ends of the interior of the tank 11, and

draft tubes

18, 18 are provided near the pair of upper and

lower baffles

17, 17. That is, each of the suction pipes 18 is provided on the downstream side of the baffle 17 in the flow direction of the gaseous refrigerant (refrigerant vapor). The baffle 17 and the air extraction pipe 18 may be provided in a pair of upper and lower positions, but it is also effective to provide only one of the first passage sides.

In the embodiment shown in fig. 17 (a) to (d), the arrangement of the heat transfer tubes 13 is adjusted to form the refrigerant vapor flow path 21, and the refrigerant vapor is caused to flow in the vicinity of the extraction pipe 18. Various embodiments are conceivable in which one refrigerant vapor flow path 21 is formed in the horizontal direction (fig. 17 (a)), a plurality of refrigerant vapor flow paths are formed in the horizontal direction (fig. 17 (b)), a single refrigerant vapor flow path is formed in the horizontal direction, and a plurality of refrigerant vapor flow paths are formed in the oblique direction (fig. 17 (c), (d)). By forming the refrigerant flow path, the refrigerant vapor is supplied into the heat transfer pipe group, and the noncondensable gas that tends to accumulate inside the heat transfer pipe group is intentionally concentrated to a portion that is likely to be drawn out by the flow of the vapor. With this configuration, the following two effects can be obtained.

(1) The 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 to the vicinity of the intentionally provided extraction portion, and is easily extracted.

In the condenser, by providing the baffle 17 and forming the refrigerant vapor flow path 21 in this way, the non-condensable gas can be easily extracted by the extraction pipe 18 by forming a stagnation portion of the non-condensable gas on the side surface (side portion) of the canister 11 which is easy to extract.

The embodiments of the present invention have been described so far, but the present invention is not limited to the above-described embodiments, and it goes without saying that the present invention can be implemented in various different forms within the scope of the technical idea thereof.

Claims

1. A condenser for a compression refrigerator is provided with: a canister; a tube plate for sealing two ends of the tank; and a heat transfer pipe group disposed in the tank, wherein the condenser for a compression refrigerator condenses the gaseous refrigerant by exchanging heat between the gaseous refrigerant introduced into the tank and the cooling water flowing through the heat transfer pipe group,

the condenser for a compression type refrigerator is characterized in that,

a baffle is arranged between the inner wall of the tank and the heat conduction pipe group, a part where the non-condensable gas is retained is formed by the baffle,

an exhaust pipe for exhausting the non-condensable gas is arranged at the part where the non-condensable gas is retained,

the air exhaust pipes are positioned below the baffle plate and arranged at two end parts of the tank barrel,

the air exhaust pipe extends horizontally and has an air exhaust hole at the lower part of the front end side,

the baffle is disposed so as to cover a predetermined number of heat transfer tubes located on the end portion side of the heat transfer tube row on the uppermost layer of the heat transfer tube group.

2. A condenser for a compression refrigerator is provided with: a canister; a tube plate for sealing two ends of the tank; and a heat transfer pipe group disposed in the tank, wherein the condenser for a compression refrigerator condenses the gaseous refrigerant by exchanging heat between the gaseous refrigerant introduced into the tank and the cooling water flowing through the heat transfer pipe group,

the condenser for a compression type refrigerator is characterized in that,

the air extraction pipe is provided near the inlet of the first passage heat transfer pipe group or near the outlet of the first passage heat transfer pipe group of the cooling water.

3. A condenser for a compression refrigerator according to claim 1,

the extraction pipe is provided at a position of the canister remote from the refrigerant vapor inflow port of the condenser.

4. A condenser for a compression refrigerator according to claim 2,

5. A condenser for a compression refrigerator according to any one of claims 1 to 4,

the heat pipe group is provided with a plurality of layers in the vertical direction, and the baffle and the exhaust pipe are arranged on the heat pipe group side of the lowest layer.

6. A condenser for a compression refrigerator according to any one of claims 1 to 4,

a part of the gap between the inner wall of the tank and the heat transfer tube group is formed to be wider than the other gap parts, thereby forming a flow path through which the gaseous refrigerant easily flows.

7. A condenser for a compression refrigerator according to any one of claims 1 to 4,

the heat transfer tubes of the heat transfer tube group are arranged in a staggered manner, and at least 1 row of the heat transfer tubes arranged in a staggered manner is removed to form a gap, and the gap is used as a flow path of the gaseous refrigerant.