CN210107818U - Shell and tube condenser and refrigerating system thereof - Google Patents

Abstract

The utility model provides a shell-and-tube condenser and a refrigeration system thereof. The shell-and-tube condenser comprises: a shell, a first inlet and a first outlet are arranged along the radial direction of the shell; a condensing tube bundle is arranged in the cavity and Close to the first inlet; the heat recovery tube bundle includes a tube body arranged in the cavity, a second inlet and a second outlet arranged outside the casing, the tube body is close to the first outlet, the second refrigerant medium circulates in the tube body, and the tube body The temperature of the first refrigeration medium after heat exchange with the condenser tube bundle is lower than the temperature of the first refrigeration medium after heat exchange with the condenser tube bundle. The refrigerant medium flows out of the second outlet and enters the heat recovery device. The above-mentioned shell-and-tube condenser makes the degree of subcooling of the first refrigeration medium flowing out from the first outlet larger, improves the stability of the refrigeration system, and at the same time improves the utilization rate of the heat of the first refrigeration medium.

Description

A shell-and-tube condenser and its refrigeration system

technical field

The utility model relates to the technical field of air conditioning and refrigeration, in particular to a shell-and-tube condenser and a refrigeration system thereof.

Background technique

The chiller generally adopts a shell-and-tube condenser. The shell-and-tube condenser includes a shell, a first tube sheet, a second tube sheet, a first chamber, a second chamber and a plurality of condenser tube bundles. The shell is provided with a refrigeration system. When the casing is placed horizontally, the refrigerant inlet is set at the upper end of the casing, and the refrigerant outlet is set at the lower end of the casing. The first tube sheet and the second tube sheet are respectively fixed on the left and right sides of the casing. The first chamber is fixed on the first tube plate, the second chamber is fixed on the second tube plate, and the second chamber is divided into an upper chamber and a lower chamber by a partition plate, and the condensing tube bundle is fixed in the shell , and the two ends of the condenser tube bundle are respectively fixed on the first tube sheet and the second tube sheet, the condenser tube bundle is communicated with the first chamber, the upper chamber and the lower chamber, the upper chamber is provided with a cooling water inlet, and the lower chamber is provided with Cooling water outlet. From the cooling water inlet, the cooling water passes through the upper chamber, the condensing tube bundle, the first chamber, another condensing tube bundle, the lower chamber and the cooling water outlet in sequence, that is, the cooling water circulates in the tubes of the condensing tube bundle, and the cooling water goes through the tube; The refrigerant enters from the refrigerant inlet and flows from top to bottom through the outside of the condenser tube bundle, and finally flows out from the refrigerant outlet, that is, the refrigerant travels the shell side.

When the refrigerant enters the casing from the refrigerant inlet, it is a gas. After the gas enters the casing, it exchanges heat with the cooling water in the condensing tube bundle and turns into a liquid, and the liquid flows out from the refrigerant outlet. When the liquid refrigerant flows out of the refrigerant outlet, the subcooling degree of the refrigerant is not high. When the liquid refrigerant flows to the throttling device through the pipeline, it must first pass through the throttling valve, and the pipe between the throttling valve and the refrigerant outlet Due to the pipeline resistance, the liquid refrigerant is prone to flash evaporation, and the gas generated by the flash evaporation will reduce the operation stability of the throttling device, thereby reducing the stability of the refrigeration system. In the prior art, in order to improve the subcooling degree of the refrigerant at the refrigerant outlet, the method of increasing the amount of refrigerant to increase the condensing temperature is generally used to improve the subcooling degree of the refrigerant at the refrigerator outlet. Although this improves the stability of the refrigeration system, since there is no heat recovery at the refrigerant outlet, the liquid refrigerant takes away a large amount of heat when it flows out of the refrigerant outlet, and the liquid refrigerant does not pass through the throttling device. The heat brought by it cannot be reused, which easily leads to a large amount of heat loss of the refrigerant in the condenser, which reduces the heat utilization rate.

Utility model content

Therefore, the technical problem to be solved by the present invention is to overcome the defect of low heat utilization rate of the refrigerant when the condenser in the prior art increases the subcooling degree of the condensate at the outlet of the condenser, thereby providing a shell Tube condenser and its refrigeration system.

In order to solve the above technical problems, on the one hand, the utility model provides a shell-and-tube condenser, comprising: a shell, a cavity for the circulation of the first refrigeration medium is formed inside, and a first refrigerating medium is arranged along the radial direction of the shell. an inlet and a first outlet, the first inlet communicates with the first outlet through the cavity;

The condenser tube bundle is arranged in the cavity and close to the first inlet, a cooling medium circulates inside the condenser tube bundle, and a first refrigeration medium circulates outside the condenser tube bundle, and the first refrigerant passes through the condenser tube bundle and the cooling medium. medium for heat exchange;

The heat recovery tube bundle includes a tube body arranged in the cavity, a second inlet and a second outlet arranged outside the casing, the tube body is close to the first outlet, and a second outlet is circulated in the tube Refrigerant medium, the temperature of the tube body is lower than the temperature of the first refrigerant medium after heat exchange with the condenser tube bundle, and the first refrigerant medium after heat exchange with the condenser tube bundle passes through the tube body and the second refrigerant medium. The cooling medium flows out from the first outlet after heat exchange, and the second cooling medium flows out from the second outlet and enters the heat recovery device.

Optionally, it also includes a subcooling plate disposed between the condenser tube bundle and the heat recovery tube bundle, and along the length direction of the casing, the side surface of the subcooling plate away from the first outlet and the A guide port is formed between the side walls of the casing, and the other sides of the subcooling plate are connected to the other side walls of the casing, so that the first refrigeration medium after heat exchange with the condenser tube bundle can be discharged from the After the diversion port flows out, it exchanges heat with the second refrigeration medium through the pipe body.

Optionally, one end of the pipe body is close to the flow guide opening, and the other end is close to the first outlet.

Optionally, the subcooling plate is arranged in parallel with the condenser tube bundle close to the subcooling plate, and the subcooling plate is arranged in parallel with the heat recovery tube bundle.

Optionally, a plurality of baffles are provided at intervals on the heat recovery tube bundle, and the plurality of baffles are used to increase the flow rate of the first refrigerant flow from the guide port to the first outlet. .

Optionally, a part of the baffle plate is connected with the subcooling plate and forms a first gap with the side wall of the casing, and another part of the baffle plate is connected with the side wall of the casing and is connected to the side wall of the casing. A second gap is formed between the supercooling plates, and the first gap and the second gap are staggered.

On the other hand, the utility model provides a refrigeration system, comprising:

Shell and tube condenser as above;

an evaporator, the first outlet of the shell-and-tube condenser communicates with the inlet of the evaporator through a fourth pipe;

a second throttling device, arranged on the fourth pipeline;

In the second compressor, the outlet of the evaporator communicates with the inlet of the compressor through a fifth conduit, and the first inlet of the condenser communicates with the outlet of the compressor through a sixth conduit.

Optionally, the heat recovery device includes:

The first compressor, the second refrigerant enters the first compressor through the inlet of the first compressor, the second outlet of the heat recovery tube bundle passes through the first pipeline and the inlet of the first compressor connected;

a heat recovery condenser, comprising a housing provided with a third inlet and a third outlet, the outlet of the first compressor communicates with the third inlet through the second conduit, and the third outlet passes through the third conduit communicated with the second inlet of the heat recovery tube bundle, and the second refrigeration medium enters the third pipeline after heat exchange in the heat recovery condenser;

The first throttling device is arranged on the third pipeline, and the second refrigerant enters the second inlet after being depressurized by the first throttling device.

Optionally, the interior of the casing is provided with a partition, the partition divides the casing into a refrigeration area and a heat recovery area, the third inlet and the third outlet are arranged in the refrigeration area, and the second refrigeration The medium flows out of the third outlet after heat exchange between the refrigeration zone and the heat recovery zone.

Optionally, the heat recovery zone is provided with a fourth inlet and a fourth outlet, and the heat transfer medium enters the heat recovery zone through the fourth inlet and exchanges heat with the second refrigeration medium in the refrigeration zone from the first outlet. Four outlets flow out.

Optionally, the fourth inlet is adjacent to the third outlet, and the fourth outlet is adjacent to the third inlet.

The technical scheme of the utility model has the following advantages:

1. The shell-and-tube condenser provided by the present utility model includes a shell, a condenser tube bundle, a subcooling plate and a heat recovery tube bundle. A cavity for the circulation of the first refrigerating medium is formed inside the shell, and a first refrigerating medium is arranged on the shell. An inlet and a first outlet, the first inlet communicates with the first outlet through the cavity, that is, the first refrigerant can flow out from the first outlet after entering the cavity through the first inlet; the condensing tube bundle is arranged in the cavity and close to the first inlet , the cooling medium circulates inside the condensing tube bundle, and the first refrigeration medium circulates outside the condensing tube bundle. The first refrigeration medium exchanges heat with the cooling medium through the condensing tube bundle, so that the gaseous first refrigeration medium and the cooling medium become liquid after heat exchange. the first refrigerant medium.

The heat recovery tube bundle includes a tube body arranged in the cavity, and a second inlet and a second outlet arranged outside the casing, the tube body is close to the first outlet, and the second refrigerant enters the tube body through the second inlet, so that it is connected with the condensing tube bundle. After the heat exchange, the first refrigeration medium that becomes liquid can exchange heat with the second refrigeration medium through the tube body, and then flows out from the first outlet. Since the temperature of the first refrigeration medium at this time is higher than the temperature of the tube body, this When the temperature of the liquid first refrigeration medium is absorbed by the second refrigeration medium, the temperature of the liquid first refrigeration medium is lowered, so that the subcooling degree of the first refrigeration medium flowing out from the first outlet is larger, and the stability of the refrigeration system is improved. At the same time, after the second refrigeration medium in the tube exchanges heat with the first refrigeration medium, it flows out from the second outlet and enters the heat recovery device, and the heat recovery device reuses the heat absorbed by the second refrigeration medium, which improves the first A utilization rate of the heat of the refrigeration medium to reduce energy waste.

2. In the shell-and-tube condenser provided by the utility model, the subcooling plate is arranged in the cavity and is located between the condenser tube bundle and the heat recovery tube bundle. Along the length direction of the shell, the subcooling plate is away from the side of the first outlet and the shell. The sidewall of the subcooling plate forms a diversion port, and the other sides of the subcooling plate are connected to the other sidewalls of the shell. It is connected with other side walls of the shell, so that the first liquid refrigerant can only flow out from the guide port, and the guide port is far away from the first outlet, so that the first liquid refrigerant flowing out from the guide port needs to be inside the shell. It takes a certain stroke to reach the first outlet, thereby increasing the contact time and contact area between the first refrigeration medium and the tube body, improving the heat exchange rate between the first refrigeration medium and the tube body, so that more heat of the first refrigeration medium is absorbed. The absorption of the second refrigerant medium further reduces the degree of subcooling of the first refrigerant medium flowing out from the first outlet, and at the same time, the utilization rate of the heat of the refrigerant is further improved.

3. In the shell-and-tube condenser provided by the utility model, one end of the tube body is close to the diversion port, and the other end is close to the first outlet, which can increase the contact stroke between the liquid first refrigeration medium and the tube body, thereby making the liquid first refrigeration medium. The contact time and the total contact area of the medium and the second refrigeration medium increase the heat exchange amount between the liquid first refrigeration medium and the second refrigeration medium.

4. In the shell-and-tube condenser provided by the utility model, the subcooling plate is arranged in parallel with the condensing tube bundle close to the subcooling plate, which can increase the flow rate of the liquid first refrigeration medium on the subcooling plate, and make the first refrigeration medium flow rapidly to the direction of the subcooling plate. The subcooling plate is arranged in parallel with the heat recovery tube bundle, which can increase the flow rate of the first refrigeration medium flowing to the first outlet, and at the same time, increase the contact area between the first refrigeration medium and the tube body, thereby increasing the first refrigeration medium and the first refrigeration medium. Second, the heat exchange efficiency of the refrigeration medium.

5. In the shell-and-tube condenser provided by the utility model, a plurality of baffles are arranged at intervals on the heat recovery tube bundle. A part of the baffle plate is connected to the side wall of the casing and forms a second gap with the subcooling plate. The first gap and the second gap are arranged alternately, which can increase the flow rate of the first refrigerant from the guide port to the first outlet. .

6. The refrigeration system provided by the utility model comprises the above-mentioned shell-and-tube condenser, evaporator, second throttling device and second compressor, and the evaporator evaporates the first refrigeration medium inside it into a gas and enters the first refrigerating medium. Two compressors, the second compressor compresses the gaseous first refrigeration medium into high temperature and high pressure gas, and then the high temperature gaseous first refrigeration medium conducts heat exchange in the shell and tube condenser, and the gaseous first refrigeration medium exchanges heat with the condenser tube bundle After that, it becomes the liquid first refrigeration medium, and the liquid first refrigeration medium flows to the heat recovery tube bundle through the action of the subcooling plate. The first outlet flows to the second throttling device, and the liquid first refrigerating medium is throttled and depressurized in the second throttling device, so that the temperature of the first refrigerating medium is further reduced, and finally enters the evaporator, where heat is exchanged in the evaporator It becomes the second compressor that the steam enters again, thereby forming a refrigeration cycle; and the cooling medium in the condensing tube bundle exchanges heat with the first refrigeration medium and leaves the condenser.

Through the heat recovery tube bundle and the heat recovery device, the refrigeration system can make the first refrigeration medium in the shell-and-tube condenser flow out from the first outlet to have a greater degree of subcooling, thereby improving the stability of the refrigeration system; at the same time, the heat After the recovery device absorbs the heat of the first refrigeration medium through the second refrigeration medium, the heat can be reused in other settings, and the heat is reused, thereby improving the utilization rate of the heat of the first refrigeration medium.

7. In the refrigeration system provided by the present invention, the heat recovery device includes a first compressor, a heat recovery condenser and a first throttling device, and the second refrigerant enters the first compressor through the inlet of the first compressor, and the heat recovery The condenser includes a casing, the casing is provided with a third inlet and a third outlet, the outlet of the first compressor is communicated with the third inlet through a second pipe, and the third outlet is communicated with the second inlet of the heat recovery tube bundle through the third pipe. A first throttling device is arranged on the third pipe, the second refrigerant in the first compressor enters the heat recovery condenser through the second pipe, and the second refrigerant passes through the third outlet after heat exchange in the heat recovery condenser Entering the third pipeline, when the second refrigerant passes through the first throttling device, the first throttling device throttles and depressurizes the second refrigerant, so that the temperature of the second refrigerant decreases to a low temperature state, and the second refrigerant After cooling down, the tube body exchanges heat with the first refrigeration medium and then flows out from the second outlet, and enters the first compressor again through the action of the first pipeline. In this way, heat recovery is formed between the heat recovery tube bundle and the heat recovery device. cycle, so that the heat of the liquid first refrigeration medium is recovered and reused.

8. In the refrigeration system provided by the present invention, a partition plate is arranged inside the casing, and the partition plate divides the casing into a refrigeration area and a heat recovery area, and the second refrigeration medium enters the refrigeration area from the third inlet and exchanges heat with the heat recovery area. , so that the heat of the second refrigerating medium is absorbed by the heat recovery area, and then the second refrigerating medium flows out from the third outlet and enters the throttling device on the third pipe for the next heat recovery cycle.

9. In the refrigeration system provided by the utility model, the heat recovery area is provided with a fourth inlet and a fourth outlet, and the heat carrier enters the heat recovery area through the fourth inlet, so that the heat carrier is indirectly exchanged with the second refrigeration medium through the partition plate. Heat, the heat carrier absorbs the heat of the second refrigeration medium and flows out from the fourth outlet to reuse the absorbed heat.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

Fig. 1 is the schematic diagram of the shell-and-tube condenser provided in the first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a refrigeration system provided in a second embodiment of the present invention.

Description of reference numbers:

1. Condenser tube bundle; 2. Shell; 21. Cavity; 22. First inlet; 23. First outlet; 24. Cooling inlet; 25. Cooling outlet; 3. Subcooling plate; 31. Diversion port; 4 , heat recovery tube bundle; 41, tube body; 42, second inlet; 43, second outlet; 5, first compressor; 6, first pipeline; 7, heat recovery condenser; 71, shell; 72, third Inlet; 73, third outlet; 74, partition; 75, fourth inlet; 76, fourth outlet; 77, refrigeration zone; 78, heat recovery zone; 8, second pipe; 9, third pipe; 10, The first throttling device; 11, the baffle plate; 111, the first notch; 112, the second notch; 12, the shell and tube condenser; 13, the evaporator; 14, the second throttling device; 15, the second compression machine; 16, the fourth pipe; 17, the fifth pipe; 18, the sixth pipe.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within 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" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

Example 1

A specific embodiment of the shell-and-tube condenser as shown in FIG. 1 includes: a shell 2 , a cavity 21 for the circulation of the first refrigeration medium is formed inside, and a first inlet is provided along the radial direction of the shell 2 22 and the first outlet 23, the first inlet 22 communicates with the first outlet 23 through the cavity 21. That is, the first refrigerant may flow out from the first outlet 23 after entering the cavity 21 through the first inlet 22 .

The condenser tube bundle 1 is arranged in the cavity 21 and is close to the first inlet 22. The cooling medium circulates inside the condenser tube bundle 1, and the first refrigeration medium circulates outside the condenser tube bundle 1. The first refrigeration medium passes through the condenser tube bundle 1 and the cooling medium to heat. Exchange, after the gaseous first refrigeration medium and the cooling medium are heat-exchanged, the liquid first refrigeration medium is changed.

The inflow and outflow methods of the cooling medium inside the condenser tube bundle 1 are in the prior art, and various known methods can be used to enter the condenser tube bundle 1 . For example, a separate cooling inlet 24 and cooling outlet 25 are provided on the shell 2, the cooling inlet 24 and the cooling outlet 25 are arranged on the same side of the tube body 41, the cooling inlet 24 and the cooling outlet 25 are respectively communicated with the condensing tube bundle 1, cooling The medium passes through the cooling inlet 24 , the condenser tube bundle 1 and the cooling outlet 25 in sequence.

The heat recovery tube bundle 4 includes a tube body 41 arranged in the cavity 21 , a second inlet 42 and a second outlet 43 arranged outside the casing 2 , the tube body 41 is close to the first outlet 23 , and the first outlet 23 circulates in the tube body 41 . Two refrigerants, the temperature of the tube body 41 is lower than the temperature of the first refrigerant after the heat exchange with the condenser tube bundle 1, and the first refrigerant after the heat exchange with the condenser tube bundle 1 passes through the tube body 41 and the second refrigerant. After the exchange, it flows out from the first outlet 23, and the second refrigerant flows out from the second outlet 43 and enters the heat recovery device.

The second refrigerating medium enters the tube body 41 through the second inlet 42, so that the first refrigerating medium that becomes liquid after heat exchange with the condensing tube bundle 1 can exchange heat with the second refrigerating medium through the tube body 41, and then the first refrigerating medium The medium flows out from the first outlet 23. Since the temperature of the first refrigeration medium at this time is higher than the temperature of the pipe body 41, that is, the temperature of the first refrigeration medium is higher than the temperature of the second refrigeration medium, at this time, the liquid first refrigeration medium The heat of the medium is absorbed by the second refrigerating medium, which reduces the temperature of the liquid first refrigerating medium, thereby making the degree of subcooling of the first refrigerating medium flowing out from the first outlet 23 greater, and improving the stability of the refrigeration system; The second refrigerating medium in the body 41 exchanges heat with the first refrigerating medium and then flows out from the second outlet 43 and enters the heat recovery device. The heat recovery device reuses the heat absorbed by the second refrigerating medium, thus improving the first refrigeration The utilization rate of the heat of the medium reduces energy waste.

In this embodiment, the cooling medium may be a refrigerant, the first refrigerant is refrigerant, the second refrigerant is refrigerant, and the second refrigerant is R134a.

The shell-and-tube condenser 12 also includes a subcooling plate 3 arranged between the condenser tube bundle 1 and the heat recovery tube bundle 4. It can be seen that the subcooling plate 3 is arranged in the shell 2; A guide port 31 is formed between the side of the cold plate 3 away from the first outlet 23 and the side wall of the casing 2 , and the other sides of the subcooling plate 3 are connected to the other side walls of the casing 2 , that is, along the direction of the cavity 21 . Circumferentially, the side of the subcooling plate far 3 away from the first outlet 23 is not connected with the cavity wall of the cavity 21, forming a guide port 31, and the other sides of the subcooling plate far 3 are directly connected with other cavity walls of the cavity 21, After the first refrigerant after heat exchange with the condenser tube bundle 1 flows out from the guide port 31 , it exchanges heat with the second refrigerant through the tube body 41 .

The liquid first refrigerant flows from the outside of the condenser tube bundle 1 to the subcooling plate 3, because the other sides of the subcooling plate 3 are connected to the other side walls of the shell 2, so that the liquid first refrigerant can only flow from the conductor. The flow port 31 flows out, and the flow guide port 31 is far away from the first outlet 23, so that the liquid first refrigerant flowing out from the flow guide port 31 needs to go through a certain stroke in the casing 2 to reach the first outlet 23, thereby increasing the The contact time and contact area between the first refrigeration medium and the pipe body 41 increase the heat exchange rate between the first refrigeration medium and the pipe body 41, so that more heat of the first refrigeration medium is absorbed by the second refrigeration medium, further reducing the heat from the first refrigeration medium. At the same time, the degree of subcooling of the first refrigerant flowing out of the outlet 23 further improves the utilization rate of the heat of the refrigerant.

It can be understood that the temperature of the subcooling plate 3 is not higher than the temperature of the first refrigeration medium after heat exchange with the condenser tube bundle 1 .

As shown in FIG. 1 , one end of the tube body 41 is close to the guide port 31, and the other end is close to the first outlet 23, which can increase the contact stroke between the liquid first refrigerant and the tube body 41, thereby making the liquid first refrigerant and the first outlet 23. The contact time and the total contact area of the second refrigeration medium increase the heat exchange between the liquid first refrigeration medium and the second refrigeration medium.

As shown in FIG. 1 , the pipe body 41 is a circulation pipeline in the cavity 21 , the second inlet 42 and the second outlet 43 are respectively two interfaces of the circulation pipeline, and both the second inlet 42 and the second outlet 43 are close to the guide Orifice 31. The end of the pipe body 41 away from the second inlet 42 and the second outlet 43 may or may not be in contact with the side wall of the casing 2 . However, the pipe body 41 is far away from the second inlet 42 and One end of the second outlet 43 is located between the side wall of the housing 2 and the first outlet 23 , that is, the end of the pipe body 41 away from the second inlet 42 and the second outlet 43 is vertically above the first outlet 23 , and the first outlet 23 extends toward the side wall of the pipe body 41 , and the side wall of the pipe body 41 is away from the side wall of the diversion port 31 at this time.

As shown in FIG. 1 , the subcooling plate 3 is arranged in parallel with the condenser tube bundle 1 close to the subcooling plate 3, which can increase the flow rate of the liquid first refrigeration medium on the subcooling plate 3, so that the first refrigeration medium can quickly flow to the guide port. 31. The supercooling plate 3 and the heat recovery tube bundle 4 are arranged in parallel and spaced apart, which can increase the flow rate of the first refrigeration medium flowing to the first outlet 23, and at the same time, increase the contact area between the first refrigeration medium and the tube body 41, thereby increasing the Second, the heat exchange efficiency of the refrigeration medium.

As shown in FIG. 1 , the heat recovery tube bundle 4 is provided with a plurality of baffles 11 at intervals, and the plurality of baffles 11 are used to increase the flow rate of the first refrigerant flow from the guide port 31 to the first outlet 23 .

A part of the baffle plate 11 is connected to the subcooling plate 3 and forms a first gap 111 between it and the side wall of the casing 2 , and another part of the baffle plate 11 is connected to the side wall of the casing 2 and formed between the subcooling plate 3 The second notches 112 , the first notches 111 and the second notches 112 are arranged alternately. In this way, the flow rate of the first refrigerant flowing from the guide port 31 to the first outlet 23 can be increased.

Embodiment 2

As shown in Figure 1 and Figure 2, the present invention provides a refrigeration system, comprising:

The shell-and-tube condenser 12 of the first embodiment;

Evaporator 13, the first outlet 23 of the shell and tube condenser 12 communicates with the inlet of the evaporator 13 through the fourth pipe 16;

The second throttling device 14 is arranged on the fourth pipe 16;

In the second compressor 15 , the outlet of the evaporator 13 communicates with the inlet of the compressor through the fifth conduit 17 , and the first inlet 22 of the condenser communicates with the outlet of the compressor through the sixth conduit 18 .

The evaporator 13 evaporates the first refrigerant medium inside it into a gas and enters the second compressor 15. The second compressor 15 compresses the gas first refrigerant medium into a high temperature and high pressure gas, and then the high temperature gas first refrigerant medium is then used in the shell and tube type. Heat exchange is performed in the condenser 12, and the gas first refrigerant medium and the condenser tube bundle 1 undergo heat exchange to become the liquid first refrigerant medium, and the liquid first refrigerant medium flows to the heat recovery tube bundle 4 through the action of the subcooling plate 3, and the liquid first refrigerant medium flows to the heat recovery tube bundle 4. The refrigeration medium exchanges heat with the heat recovery tube bundle 4 , so that the temperature of the liquid first refrigeration medium decreases, and then flows to the second throttling device 14 through the first outlet 23 , and the liquid first refrigeration medium is throttled in the second throttling device 14 . The temperature of the first refrigerating medium is further reduced, and finally enters the evaporator 13, and the heat exchange in the evaporator 13 becomes the second compressor 15 that the steam enters again, thereby forming a refrigeration cycle; while the condensing tube bundle 1 The cooling medium inside and the first cooling medium leave the condenser after heat exchange.

Through the heat recovery tube bundle 4 and the heat recovery device, the refrigeration system can make the first refrigeration medium in the shell-and-tube condenser 12 flow out from the first outlet 23 to have a greater degree of subcooling, thereby improving the stability of the refrigeration system; At the same time, after the heat recovery device absorbs the heat of the first refrigeration medium through the second refrigeration medium, the heat can be reused in other settings, and the heat can be reused, thereby improving the utilization rate of the heat of the first refrigeration medium.

The temperature of the first refrigerant medium flowing out of the second compressor 15 is higher than the temperature of the second refrigerant medium flowing out of the first compressor 5 . The temperature of the first refrigerating medium after the heat exchange with the condenser tube bundle 1 and the first refrigerating medium flowing out from the diversion port 31 is higher than the temperature of the second refrigerating medium; The temperature of the first refrigerating medium and the first refrigerating medium flowing out from the guide port 31 is higher than the temperature of the pipe body 41 . The temperature of the second refrigerant flowing out from the second outlet 43 is higher than the temperature of the second refrigerant in the pipe body 41 , and the temperature of the second refrigerant flowing out from the second outlet 43 is higher than that of the second refrigerant flowing in from the second inlet and outlet. temperature of the cooling medium.

As shown in Figure 2, the heat recovery device includes:

The first compressor 5 and the second refrigerant enter the first compressor 5 through the inlet of the first compressor 5 , and the second outlet 43 of the heat recovery tube bundle 4 communicates with the inlet of the first compressor 5 through the first pipe 6 .

The heat recovery condenser 7 includes a casing 71, the casing 71 is provided with a third inlet 72 and a third outlet 73, the outlet of the first compressor 5 communicates with the third inlet 72 through the second pipe 8, and the third outlet 73 passes through the third The pipeline 9 is communicated with the second inlet 42 of the heat recovery tube bundle 4, and the second refrigerant enters the third pipeline 9 after heat exchange in the heat recovery condenser 7;

The first throttling device 10 is arranged on the third pipeline 9 , and the second refrigerant enters the second inlet 42 after being depressurized by the first throttling device 10 .

The second refrigerant in the first compressor 5 enters the heat recovery condenser 7 through the second pipe 8, and the second refrigerant enters the third pipe 9 through the third outlet 73 after heat exchange in the heat recovery condenser 7. When the second refrigerating medium passes through the first throttling device 10, the first throttling device 10 throttles and depressurizes the second refrigerating medium, so that the temperature of the second refrigerating medium is reduced to a low temperature state, and the second refrigerating medium is cooled down and then piped After heat exchange with the first refrigeration medium in the body 41, it flows out from the second outlet 43, and enters the first compressor 5 again through the action of the first pipe 6. In this way, the heat recovery tube bundle 4 and the heat recovery device are formed. The heat recovery cycle enables the heat of the liquid first refrigeration medium to be recovered and reused.

As shown in FIG. 2 , a partition 74 is provided inside the casing 71. The partition 74 divides the casing 71 into a refrigeration zone 77 and a heat recovery zone 78. The third inlet 72 and the third outlet 73 are arranged in the refrigeration zone 77, and the second The refrigeration medium flows out from the third outlet 73 after the heat exchange between the refrigeration zone 77 and the heat recovery zone 78 . The second refrigerating medium enters the refrigerating zone 77 from the third inlet 72 and exchanges heat with the heat recovery zone 78, so that the heat of the second refrigerating medium is absorbed by the heat recovery zone 78, and then the second refrigerating medium flows out from the third outlet 73 into the heat recovery zone 78. The throttling device on the third pipe 9 carries out the next heat recovery cycle.

As shown in FIG. 2, the heat recovery zone 78 is provided with a fourth inlet 75 and a fourth outlet 76. The heat transfer medium enters the heat recovery zone 78 through the fourth inlet 75 and exchanges heat with the second refrigerant in the refrigeration zone 77 from the first Four outlets 76 flow out. The heat transfer medium enters the heat recovery area 78 through the fourth inlet 75, so that the heat transfer medium conducts indirect heat exchange with the second refrigeration medium through the partition plate 74, and the heat transfer medium absorbs the heat of the second refrigeration medium and flows out from the fourth outlet 76 , to reuse the absorbed heat; at the same time, the temperature of the second refrigeration medium is further reduced.

The heat transfer medium may be a heat transfer agent.

As shown in FIG. 2, the fourth inlet 75 is close to the third outlet 73, and the fourth outlet 76 is close to the third inlet 72, so that convection can be formed between the second refrigeration medium and the heat carrier medium, which is beneficial to the second refrigeration medium and the carrier medium. The heat medium conducts heat exchange, which can improve the efficiency of heat exchange.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. a shell and tube condenser, is characterized in that, comprises: The casing (2) is provided with a cavity (21) for the circulation of the first refrigeration medium, and a first inlet (22) and a first outlet (23) are arranged along the radial direction of the casing (2), so The first inlet (22) communicates with the first outlet (23) through the cavity (21); A condenser tube bundle (1) is arranged in the cavity (21) and close to the first inlet (22), a cooling medium circulates inside the condenser tube bundle (1), and a cooling medium circulates outside the condenser tube bundle (1) a first refrigeration medium, the first refrigeration medium performs heat exchange with the cooling medium through the condenser tube bundle (1); a heat recovery tube bundle (4), comprising a tube body (41) arranged in the cavity (21), a second inlet (42) and a second outlet (43) arranged outside the casing (2), The pipe body (41) is close to the first outlet (23), the second refrigerant medium flows in the pipe body (41), and the temperature of the pipe body (41) is lower than that of the condensing tube bundle (1). ) temperature of the first refrigerating medium after heat exchange, the first refrigerating medium after heat exchange with the condenser tube bundle (1) passes through the tube body (41) and exchanges heat with the second refrigerating medium from the first refrigerating medium An outlet (23) flows out, and the second refrigerant flows out from the second outlet (43) and enters the heat recovery device. 2. The shell-and-tube condenser according to claim 1, characterized in that, further comprising a subcooling plate (3) arranged between the condensation tube bundle (1) and the heat recovery tube bundle (4), along the In the length direction of the casing (2), a flow guide port (31) is formed between the side surface of the subcooling plate (3) away from the first outlet (23) and the side wall of the casing (2). , the other side surfaces of the subcooling plate (3) are connected with the other side walls of the shell (2), so that the first refrigeration medium after heat exchange with the condenser tube bundle (1) flows from the guide After the port (31) flows out, it exchanges heat with the second refrigeration medium through the pipe body (41). 3. The shell-and-tube condenser according to claim 2, characterized in that, one end of the pipe body (41) is close to the flow guide port (31), and the other end is close to the first outlet (23). 4. The shell-and-tube condenser according to claim 2 or 3, wherein the subcooling plate (3) is arranged in parallel with the condenser tube bundle (1) close to the subcooling plate (3), so that the The supercooling plates (3) are arranged in parallel with the heat recovery tube bundles (4) at intervals. The shell-and-tube condenser according to claim 4, characterized in that, a plurality of baffles (11) are provided at intervals on the heat recovery tube bundle (4), and a plurality of the baffles (11) It is used to increase the flow rate of the first refrigerant flow from the flow guide port (31) to the first outlet (23). 6. The shell-and-tube condenser according to claim 5, wherein a part of the baffle plate (11) is connected with the subcooling plate (3) and between the side wall of the shell (2) A first gap (111) is formed, and another part of the baffle plate (11) is connected to the side wall of the casing (2) and a second gap (112) is formed between it and the supercooling plate (3), The first notches (111) and the second notches (112) are staggered. 7. A refrigeration system, characterized in that, comprising: The shell-and-tube condenser (12) of any one of claims 1-6; an evaporator (13), the first outlet (23) of the shell-and-tube condenser (12) communicates with the inlet of the evaporator (13) through a fourth pipe (16); a second throttling device (14), arranged on the fourth pipe (16); The second compressor (15), the outlet of the evaporator (13) communicates with the inlet of the compressor through a fifth conduit, and the first inlet (22) of the condenser communicates with the compressor through a sixth conduit The outlet is connected. 8. The refrigeration system according to claim 7, wherein the heat recovery device comprises: The first compressor (5), the second refrigerant medium enters the first compressor (5) through the inlet of the first compressor (5), and the second outlet ( 43) communicate with the inlet of the first compressor (5) through the first pipeline (6); A heat recovery condenser (7) comprising a casing (71) provided with a third inlet (72) and a third outlet (73), the outlet of the first compressor (5) passing through the second The pipe (8) communicates with the third inlet (72), the third outlet (73) communicates with the second inlet (42) of the heat recovery tube bundle (4) through the third pipe (9), and the second refrigerant medium Enter the third pipeline (9) after heat exchange in the heat recovery condenser (7); The first throttling device (10) is arranged on the third pipeline (9), and the second refrigerant enters the second inlet (42) after being depressurized by the first throttling device (10). 9 . The refrigeration system according to claim 8 , wherein a partition plate ( 74 ) is arranged inside the casing ( 71 ), and the partition plate ( 74 ) divides the casing ( 71 ) into a refrigeration area. 10 . (77) and a heat recovery zone (78), the third inlet (72) and the third outlet (73) are arranged in the refrigeration zone (77), and the second refrigerant is in the refrigeration zone (77) and the heat recovery zone (78) flows out from the third outlet (73) after heat exchange. 10. The refrigeration system according to claim 9, characterized in that, the heat recovery zone (78) is provided with a fourth inlet (75) and a fourth outlet (76), and the heat transfer medium passes through the fourth inlet ( 75) After entering the heat recovery zone (78), the second refrigerant medium in the refrigeration zone (77) exchanges heat and flows out from the fourth outlet (76).

Images