CN218120270U

CN218120270U - Horizontal heat regenerator for high-efficiency low-temperature refrigeration system

Info

Publication number: CN218120270U
Application number: CN202221919426.3U
Authority: CN
Inventors: 陆嘉文; 曹德云
Original assignee: Square Technology Group Co Ltd
Current assignee: Square Technology Group Co Ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-12-23
Anticipated expiration: 2032-07-21

Abstract

The utility model relates to a horizontal regenerator for high-efficient low temperature refrigerating system, including casing, first tube sheet and second tube sheet, a plurality of heat exchange tubes, the heat exchange tube passes first tube sheet and second tube sheet, and first tube sheet and second tube sheet divide into first cavity, second cavity and third cavity with the casing inside, and the heat exchange tube sets up in the second cavity, and the heat exchange tube will first cavity and third cavity intercommunication set up the air inlet on the casing, set up the gas outlet on the casing, set up inlet and liquid outlet on the second cavity, be provided with the oil return opening bottom the third cavity; one side of the air outlet close to the heat exchange tube extends inwards to form a baffle. The whole horizontal heat regenerator has simple design structure and high-efficiency heat exchange capacity, so that the liquid refrigerant which is not overheated at the low-pressure side is fully and effectively overheated, the liquid refrigerant at the high-pressure side can be overcooled, and the refrigeration efficiency of the compressor is greatly improved; the efficiency of gas-liquid separation is improved, and the stable operation of the compressor is protected; the oil return effect is good, and the system safety is improved.

Description

Horizontal heat regenerator for high-efficiency low-temperature refrigerating system

Technical Field

The utility model belongs to the technical field of the cryogenic refrigeration technique and specifically relates to a high-efficient low temperature horizontal regenerator for refrigerating system is related to.

Background

With the rising demand of low carbon, environmental protection, energy conservation and high efficiency in society, the improvement of the energy efficiency ratio of refrigeration equipment in the refrigeration industry is a key point in the sustainable development direction of the industry.

In a refrigerating unit in the refrigeration and cold storage industry, in order to reduce energy consumption, a single-machine two-stage screw compressor is usually selected, and when the compressor operates, liquid refrigerant which is not overheated in an evaporator is sucked into a cylinder of the compressor along with gas, so that a liquid accumulation phenomenon is caused. Once the compressor has liquid accumulation, the high pressure generated by the liquid accumulation can deform and damage the stressed element in the cylinder. Generally, in order to prevent the liquid accumulation of the compressor, a gas-liquid separator or a heat regenerator is arranged in front of an air suction port of the compressor. The existing gas-liquid separator only has the function of separating gas from liquid, and the existence of liquid can increase the suction resistance of the compressor and influence the refrigerating capacity of the compressor; the heat exchange area of the existing heat regenerator is too small, so that the refrigerating efficiency of the compressor cannot be obviously improved; meanwhile, the gas-liquid separator and the heat regenerator are two independent components, if the two components are used at the same time, a large space is occupied, and meanwhile, the cost is correspondingly increased.

Disclosure of Invention

The utility model aims to solve the technical problem that a horizontal regenerator for high-efficient low temperature refrigerating system that can play gas-liquid separation and can realize the heat exchange effect is provided.

The utility model provides a technical scheme that its technical problem adopted is: a horizontal heat regenerator for a high-efficiency low-temperature refrigeration system comprises a shell, a first tube plate, a second tube plate and a plurality of heat exchange tubes, wherein the first tube plate and the second tube plate are arranged in the shell, the plurality of heat exchange tubes are arranged between the first tube plate and the second tube plate, the heat exchange tubes penetrate through the first tube plate and the second tube plate, the first tube plate and the second tube plate divide the interior of the shell into a first cavity, a second cavity and a third cavity, the heat exchange tubes are arranged in the second cavity, the first cavity and the third cavity are communicated through the heat exchange tubes, an air inlet used for communicating the first cavity is formed in the shell, an air outlet used for communicating the third cavity is formed in the shell, an liquid inlet and a liquid outlet are formed in the second cavity, and an oil return opening is formed in the bottom of the third cavity; one side of the air outlet close to the heat exchange tube extends inwards to form a baffle.

More specifically, the liquid inlet is positioned at the bottom of the second chamber and is arranged close to one side of the air outlet; the liquid outlet is located the second chamber bottom and is close to air inlet one side setting.

More specifically, a plurality of baffle plates which are arranged in a staggered mode are arranged in the second chamber.

More specifically, the baffle plates are arranged in a vertically staggered manner.

More specifically, the baffle plate closest to the liquid inlet and the liquid outlet is arranged at the lower part of the second chamber.

Further specifically, a first filter screen is arranged in the first chamber, and the first filter screen is positioned on a moving path from the gas entering the first chamber to the heat exchange tube.

Further specifically, a second filter screen is arranged in the third chamber, the second filter screen divides the third chamber into a first space close to the heat exchange tube and a second space far away from the heat exchange tube, and the air outlet and the oil return opening are located in the second space.

More specifically, the baffle is formed by obliquely cutting a pipe inserted from the air outlet, the maximum height of the baffle is close to the heat exchange pipe, and the minimum height of the baffle is far away from the heat exchange pipe.

Further specifically, a first interface and a second interface are arranged at the top of the shell, the first interface and the second interface are both communicated with the second chamber, the first interface is connected with a pressure gauge, and the second interface is connected with a safety valve.

Further specifically, gaps are formed among the plurality of heat exchange tubes, and the plurality of heat exchange tubes are uniformly distributed on the first tube plate and the second tube plate.

The beneficial effects of the utility model are that: the whole horizontal heat regenerator has simple design structure and high-efficiency heat exchange capacity, so that the liquid refrigerant which is not overheated at the low-pressure side is fully and effectively overheated, the liquid refrigerant at the high-pressure side can be overcooled, and the refrigeration efficiency of the compressor is greatly improved; the efficiency of gas-liquid separation is improved, and the compressor is protected from stable operation while enough suction capacity is provided for the compressor; the cleanliness of equipment in the high-efficiency low-temperature refrigeration system is improved, the oil return effect is good, and the system safety is improved.

Drawings

Fig. 1 is a schematic structural diagram of the horizontal regenerator for the high-efficiency low-temperature refrigeration system of the present invention.

In the figure: 1. a first tubesheet; 2. a second tube sheet; 3. a heat exchange pipe; 4. an air inlet; 5. an air outlet; 6. a liquid inlet; 7. a liquid outlet; 8. an oil return port; 9. a baffle plate; 10. a baffle plate; 11. a first filter screen; 12. a second filter screen; 13. a first interface; 14. a second interface; 15. a pressure gauge; 16. a safety valve; 100. a housing; 110. a first chamber; 111. a third space; 112. a fourth space; 120. a second chamber; 130. a third chamber; 131. a first space; 132. a second space.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art. Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, a horizontal regenerator for a high-efficiency low-temperature refrigeration system includes a casing 100, a first tube plate 1 and a second tube plate 2 arranged in the casing 100, and a plurality of heat exchange tubes 3 arranged between the first tube plate 1 and the second tube plate 2, wherein the casing 100 is cylindrical and horizontally arranged, both ends of the casing are arc surfaces, the heat exchange tubes 3 pass through the first tube plate 1 and the second tube plate 2, the first tube plate 1 is located at one end of the heat exchange tubes 3 and keeps sealed, the second tube plate 2 is located at the other end of the heat exchange tubes 3 and keeps sealed, the heat exchange tubes 3 herein adopt high-efficiency heat exchange tubes, heat exchange can be efficiently performed, gaps are formed between the plurality of heat exchange tubes 3, liquid refrigerant can conveniently pass through the gaps, and the plurality of heat exchange tubes 3 are uniformly distributed on the first tube plate 1 and the second tube plate 2, so as to improve the efficiency of heat exchange; the first tube plate 1 and the second tube plate 2 are vertically fixed in the shell 100, and divide the shell 100 into three chambers, namely a first chamber 110, a second chamber 120 and a third chamber 130, wherein the first chamber 110 and the third chamber 130 are located at two end portions of the shell 100, the second chamber 120 is located between the first chamber 110 and the third chamber 130, the first chamber 110 and the second chamber 120 are sealed, and the second chamber 120 and the third chamber 130 are sealed; the heat exchange tube 3 is positioned in the second chamber 120, the heat exchange tube 3 communicates the first chamber 110 with the third chamber 130, and the gas in the first chamber 110 can flow into the third chamber 130 through the heat exchange tube 3; a gas inlet 4 for communicating the first chamber 110 is arranged on the shell 100, refrigerant gas at a low pressure side enters the first chamber 110 through the gas inlet 4 and then enters the third chamber 130 along the heat exchange tube 3, a gas outlet 5 for communicating the third chamber 130 is arranged on the shell 100, and at the moment, gaseous refrigerant in the third chamber 130 can be discharged from the gas outlet 5; a liquid inlet 6 and a liquid outlet 7 are arranged on the second chamber 120, and the liquid refrigerant at the high-pressure side enters from the liquid inlet 6 and flows out from the liquid outlet 7; at the moment, the liquid refrigerant at the high pressure side exchanges heat with the gaseous refrigerant at the low pressure side, so that the liquid refrigerant mixed in the gaseous refrigerant at the low pressure side is gasified, the temperature of the liquid refrigerant at the high pressure side is reduced, the enthalpy value is increased, the heat exchange is realized, the liquid refrigerant at the low pressure side is not enabled to enter the compressor, the flash gas at the high pressure side is also reduced, and the refrigeration effect of the compressor can be greatly improved.

Meanwhile, an oil return opening 8 is formed in the bottom of the third chamber 130, oil mixed into the low-pressure side refrigerant flows to the oil return opening 8 in the third chamber 130, and the oil enters the compressor through the oil return opening 8 to be continuously used.

In order to facilitate the collection of the oil liquid in the third chamber 130, the baffle 9 is formed by extending the side of the air outlet 5 close to the heat exchange tube 3 inwards, the gaseous refrigerant can enter the air outlet 5 only after passing through the baffle 9 downwards, the oil liquid mixed in the gaseous refrigerant and having a small volume can be collected on the baffle 9 to form oil liquid with a large volume when meeting the baffle 9, and the oil liquid is collected downwards to the bottom of the third chamber 130 along the baffle 9 and finally can be discharged through the oil return port 8.

The baffle 9 here is formed by obliquely cutting a tube inserted from the gas outlet 5, and in operation, the obliquely cut inclined plane has an included angle with the horizontal direction, the inclined plane enables the baffle 9 to have a maximum height, a minimum height and a transition height between the maximum height and the minimum height, the maximum height of the baffle 9 is close to the heat exchange tube 3, and the minimum height of the baffle 9 is far away from the heat exchange tube 3; the mode can not only play the role of recovering oil, but also facilitate the processing.

In order to improve the heat exchange effect between the low-pressure side gaseous refrigerant and the high-pressure side liquid refrigerant, the flow direction of the low-pressure side gaseous refrigerant is opposite to the flow direction of the high-pressure side liquid refrigerant, so the liquid inlet 6 is located at the bottom of the second chamber 120 and is arranged near the gas outlet 5, and the liquid outlet 7 is located at the bottom of the second chamber 120 and is arranged near the gas inlet 4.

As the liquid inlet 6 and the liquid outlet 7 are arranged at the bottom of the shell 100, in order to ensure that the liquid refrigerant can fully contact with the heat exchange tubes 3, a plurality of baffle plates 10 which are arranged in a staggered manner are arranged in the second chamber 120, the staggered manner can be staggered in the horizontal direction and staggered up and down in the vertical direction, and meanwhile, the baffle plates 10 can have different heights or the same height; in the scheme, a vertically staggered mode is adopted, and meanwhile, in order to ensure that the heat exchange efficiency is improved as much as possible when liquid is fed and discharged, the baffle plate 10 closest to the liquid inlet 6 and the liquid outlet 7 is arranged at the lower part of the second chamber 120, so that the contact time of a liquid refrigerant and the heat exchange tube 3 can be prolonged in the liquid feeding process.

A first filter screen 11 is arranged in the first chamber 110, the first filter screen 11 is positioned on a moving path from the gaseous refrigerant entering the first chamber 110 to the heat exchange tube 3, the first filter screen 11 is vertically arranged and divides the first chamber 110 into a third space 111 and a fourth space 112, the air inlet 4 is communicated with the third space 111, the fourth space 112 is formed by surrounding the first filter screen 11, the first tube plate 1 and the shell 100, and the refrigerant is buffered in the fourth space 112 and can be uniformly distributed; gaseous state refrigerant at this place contains partial liquid state refrigerant, and the gaseous state refrigerant that mixes there is liquid state refrigerant filters impurity through first filter screen 11, prevents that impurity from getting into the compressor, and simultaneously, the gaseous state refrigerant evenly distributed through first filter screen 11 is in fourth space 112, makes gaseous state refrigerant evenly get into in a plurality of heat exchange tubes 3, guarantees smooth and easy of air current, carries out high-efficient heat exchange.

A second filter 12 is arranged in the third chamber 130, the second filter 12 divides the third chamber 130 into a first space 131 close to the heat exchange tube 3 and a second space 132 far away from the heat exchange tube 3, and the air outlet 5 and the oil return opening 8 are positioned in the second space 132; after passing through the heat exchange tube 3, the liquid refrigerant absorbs heat and becomes a gaseous refrigerant, at this time, the refrigerant becomes a gaseous refrigerant, the gaseous refrigerant enters the first space 131 first, the first space 131 has buffering and uniform distribution functions, then the second filter screen 12 filters some impurities to prevent the impurities from entering the compressor, and meanwhile, the liquid oil mixed in the gaseous refrigerant can be partially filtered and can be collected to the bottom of the second space 132 along the second filter screen 12.

Further, in order to prevent the pressure in the casing 100 from being too high, a first connector 13 and a second connector 14 are arranged at the top of the casing 100, the first connector 13 and the second connector 14 are both communicated with the second chamber 120, the first connector 13 is connected with a pressure gauge 15, the second connector 14 is connected with a safety valve 16, the pressure in the casing 100 can be directly observed through the pressure gauge 15, and the safety valve 16 is controlled to be opened to release pressure, so that danger is prevented.

In conclusion, the whole horizontal heat regenerator is simple in design structure and has high-efficiency heat exchange capacity, so that the liquid refrigerant which is not overheated at the low-pressure side is fully and effectively overheated, the liquid refrigerant at the high-pressure side can be supercooled, liquid can not accumulate in a compressor, flash gas can not appear at the high-pressure side, and the refrigeration efficiency of the compressor can be greatly improved; the efficiency of gas-liquid separation is improved, and the compressor is protected from running stably while enough suction capacity is provided for the compressor; through the use of first filter screen 11, second filter screen 12 and baffle 9 for equipment cleanliness factor obtains improving in the high-efficient low temperature refrigerating system, and the oil return is respond well, and system security obtains improving.

It is to be emphasized that: the above is only a preferred embodiment of the present invention, and the present invention is not limited to any form, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. The horizontal heat regenerator for the high-efficiency low-temperature refrigeration system is characterized by comprising a shell (100), a first tube plate (1) and a second tube plate (2) which are arranged in the shell (100), and a plurality of heat exchange tubes (3) which are arranged between the first tube plate (1) and the second tube plate (2), wherein the heat exchange tubes (3) penetrate through the first tube plate (1) and the second tube plate (2), the first tube plate (1) and the second tube plate (2) divide the interior of the shell (100) into a first chamber (110), a second chamber (120) and a third chamber (130), the heat exchange tubes (3) are arranged in the second chamber (120), the heat exchange tubes (3) are used for communicating the first chamber (110) with the third chamber (130), an air inlet (4) for communicating the first chamber (110) is arranged on the shell (100), an air outlet (5) for communicating the third chamber (130) is arranged on the shell (100), an oil inlet (6) and an oil outlet (7) are arranged on the second chamber (120), and an oil return opening (8) is arranged at the bottom of the third chamber (130); one side of the air outlet (5) close to the heat exchange tube (3) extends inwards to form a baffle (9).

2. The horizontal regenerator for the high-efficiency low-temperature refrigeration system according to claim 1, wherein the liquid inlet (6) is positioned at the bottom of the second chamber (120) and close to one side of the gas outlet (5); the liquid outlet (7) is positioned at the bottom of the second chamber (120) and is arranged close to one side of the air inlet (4).

3. The horizontal regenerator for a high efficiency cryogenic refrigeration system according to claim 2, wherein a plurality of baffles (10) are arranged in a staggered manner inside the second chamber (120).

4. The horizontal regenerator for a high efficiency cryogenic refrigeration system according to claim 3 wherein the baffles (10) are arranged in a staggered manner.

5. The horizontal regenerator for a high-efficiency cryogenic refrigeration system according to claim 4, wherein the baffle (10) closest to the liquid inlet (6) and the liquid outlet (7) is disposed at the lower portion of the second chamber (120).

6. The horizontal regenerator for a high-efficiency cryogenic refrigeration system according to claim 1, wherein a first filter (11) is disposed in the first chamber (110), and the first filter (11) is located on a moving path of gas entering the first chamber (110) to the heat exchange pipe (3).

7. The horizontal type regenerator for a high efficiency cryogenic refrigerating system according to claim 1, wherein a second filter (12) is disposed in the third chamber (130), the second filter (12) divides the third chamber (130) into a first space (131) close to the heat exchange tube (3) and a second space (132) far away from the heat exchange tube (3), and the air outlet (5) and the oil return opening (8) are disposed in the second space (132).

8. The horizontal regenerator for a high efficiency low temperature refrigerating system according to claim 1, wherein the baffle (9) is formed by obliquely cutting a tube inserted from the gas outlet (5), the baffle (9) having a maximum height close to the heat exchange tubes (3) and a minimum height away from the heat exchange tubes (3).

9. The horizontal regenerator for the high-efficiency cryogenic refrigeration system according to claim 1, wherein a first port (13) and a second port (14) are arranged at the top of the housing (100), the first port (13) and the second port (14) are both communicated with the second chamber (120), a pressure gauge (15) is connected to the first port (13), and a safety valve (16) is connected to the second port (14).

10. The horizontal regenerator for the high-efficiency low-temperature refrigerating system according to claim 1, wherein a plurality of heat exchange tubes (3) have gaps therebetween, and the plurality of heat exchange tubes (3) are uniformly distributed on the first tube plate (1) and the second tube plate (2).