Refrigeration structure with liquid supply heat exchange function

Abstract

The utility model relates to refrigeration equipment technical field, and disclose a kind of refrigeration structure with liquid supply heat exchange function, including gas-liquid separator, gas-liquid separator side is equipped with liquid accumulator, further include: install the back gas heat exchange pipe in liquid accumulator inside, back gas heat exchange pipe is equipped with gas-liquid separator entrance, gas-liquid separator inside is equipped with compressor back gas pipe, compressor back gas pipe is equipped with gas-liquid separator export, gas-liquid separator is equipped with evaporator back gas pipe, back oil port is opened in compressor back gas pipe, gas-liquid separator and liquid accumulator between are equipped with gas partition plate;The utility model utilizes the low-temperature back gas of evaporator, and the high-temperature liquid heat exchange of liquid accumulator, and the low-temperature refrigerant after heat exchange enters evaporator, and the low-temperature refrigerant returned by evaporator enters gas-liquid separator after heat exchange with liquid accumulator, and returns compressor after gas-liquid separation, and recirculates.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically a refrigeration structure with liquid supply and heat exchange function. Background Technology

[0002] In the operation of traditional refrigeration equipment, the compressor load constantly changes with actual operating conditions, such as fluctuations in ambient temperature and increases or decreases in refrigeration demand, which leads to corresponding changes in the refrigerant supply. When the refrigerant supply exceeds the compressor's actual needs, liquid slugging occurs. The hazards of liquid slugging are severe. When liquid refrigerant enters the compressor, its incompressibility creates a huge impact force between moving parts such as the compressor piston or scroll plate, a phenomenon known as liquid slugging. Liquid slugging directly damages the compressor's mechanical structure, causing internal parts to break, accelerating wear, significantly shortening the compressor's lifespan, increasing equipment maintenance costs and downtime, and seriously affecting the stable operation of the refrigeration system.

[0003] Traditional refrigeration equipment typically installs a gas-liquid separator to address liquid return issues. The mixed refrigerant returning from the evaporator to the compressor first enters the gas-liquid separator, where gravity or centrifugal force initiates gas-liquid separation. The gas then enters the compressor, while the liquid is temporarily stored. However, this simple gas-liquid separation method has significant shortcomings. Firstly, its separation effect is limited. For some tiny droplets or rapidly flowing refrigerant, complete separation is difficult, and some liquid refrigerant will still enter the compressor, failing to effectively prevent liquid return and liquid slugging risks. Secondly, the gas-liquid separator can only separate already mixed refrigerants; it cannot regulate the refrigerant supply at the source. It cannot dynamically adjust the supply based on compressor load changes, and under conditions of large load fluctuations, the liquid return problem remains prominent. Utility Model Content

[0004] The purpose of this invention is to provide a refrigeration structure with liquid supply and heat exchange function to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a refrigeration structure with liquid supply and heat exchange function, including a gas-liquid separator, wherein a liquid storage tank is installed on one side of the gas-liquid separator, and further comprising:

[0006] A return gas heat exchange tube is installed inside the liquid receiver. A gas-liquid separator inlet is provided on the return gas heat exchange tube. A compressor return gas pipe is installed inside the gas-liquid separator. A gas-liquid separator outlet is installed on the compressor return gas pipe. An evaporator return gas pipe is installed on the gas-liquid separator.

[0007] Preferably, the compressor return pipe is provided with an oil return port.

[0008] Preferably, a gas separator is installed between the gas-liquid separator and the liquid reservoir.

[0009] Preferably, the liquid receiver is equipped with an evaporator supply pipe, and the evaporator supply pipe and the compressor return pipe extend to the outside of the liquid receiver and the gas-liquid separator, respectively.

[0010] Preferably, both the gas-liquid separator and the liquid storage tank are fixedly connected to the bottom with support legs, and are fixedly connected to the outside with lifting rings.

[0011] Preferably, the liquid reservoir is equipped with two sight glasses.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention utilizes the low-temperature return gas from the evaporator to exchange heat with the high-temperature liquid in the receiver. The low-temperature refrigerant after heat exchange enters the evaporator, and the low-temperature refrigerant returning from the evaporator, after heat exchange with the receiver, enters the gas-liquid separator. After gas-liquid separation, it returns to the compressor for recirculation. By using the receiver, gas-liquid separator, and heat exchanger in combination, the refrigeration unit allows the condensed liquid refrigerant after compression by the compressor to enter the receiver for heat exchange with the high-temperature liquid, increasing the cooling capacity and reducing the risk of liquid slugging caused by liquid return from the compressor. The mixed refrigerant returning from the evaporator to the compressor first enters the heat exchanger, undergoing heat exchange one way before going to the compressor, reducing the risk of liquid slugging caused by liquid return from the compressor, and another way before going to the evaporator to increase the cooling capacity. It is simple to install, low in cost, increases operational safety, and increases cooling capacity while lowering operating costs. Attached Figure Description

[0014] Figure 1 A schematic diagram of the main structure of the refrigeration structure with liquid supply and heat exchange function provided by this utility model;

[0015] Figure 2 Schematic diagram of the gas-liquid separator and liquid storage tank provided by this utility model;

[0016] Figure 3 A schematic diagram of the internal structure of the gas-liquid separator and liquid storage tank provided by this utility model.

[0017] In the diagram: 1. Gas-liquid separator; 2. Liquid receiver; 3. Return gas heat exchanger tube; 4. Gas-liquid separator inlet; 5. Gas-liquid separator outlet; 6. Evaporator liquid supply pipe; 7. Compressor return gas pipe; 8. Evaporator return gas pipe; 9. Oil return port; 10. Gas separator plate; 11. Support leg; 12. Sight glass; 13. Lifting ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-3 As shown, a refrigeration structure with liquid supply and heat exchange function includes a gas-liquid separator 1. The mixed refrigerant returning from the evaporator to the compressor first enters the gas-liquid separator 1 to reduce the risk of liquid return from the compressor and liquid slugging. A liquid receiver 2 is installed on one side of the gas-liquid separator 1. The refrigeration unit enters the liquid receiver 2 after the liquid refrigerant is compressed and condensed by the compressor to exchange heat with the high-temperature liquid, increasing the cooling capacity and reducing the risk of liquid return from the compressor and liquid slugging. It also includes a return gas heat exchange pipe 3 installed inside the liquid receiver 2. The mixed refrigerant returning from the evaporator to the compressor first enters the heat exchanger. After heat exchange, it goes to the compressor to reduce the risk of liquid return from the compressor and liquid slugging. After heat exchange, it goes to the evaporator to increase the cooling capacity. A gas-liquid separator inlet 4 is provided on the return gas heat exchange pipe 3. A compressor return gas pipe 7 is installed inside the gas-liquid separator 1. A gas-liquid separator outlet 5 is installed on the compressor return gas pipe 7. An evaporator return gas pipe 8 is installed on the gas-liquid separator 1.

[0020] It should be noted that during the refrigeration process, the compressor's liquid supply will change due to load variations, resulting in liquid return. This equipment utilizes the low-temperature return gas from the evaporator to exchange heat with the high-temperature liquid in the receiver 2. After heat exchange, the low-temperature refrigerant enters the evaporator. The low-temperature refrigerant returning from the evaporator, after heat exchange with the receiver 2, enters the gas-liquid separator 1, and returns to the compressor after gas-liquid separation for recirculation.

[0021] An oil return port 9 is provided on the compressor return pipe 7; a gas separator 10 is installed between the gas-liquid separator 1 and the liquid receiver 2; an evaporator liquid supply pipe 6 is installed in the liquid receiver 2, and the evaporator liquid supply pipe 6 and the compressor return pipe 7 extend to the outside of the liquid receiver 2 and the gas-liquid separator 1, respectively; the mixed refrigerant returning to the compressor via the evaporator return pipe 8 first enters the gas-liquid separator 1, and after passing through the gas-liquid separator 1 and entering the liquid receiver 2, it passes through the return gas heat exchange pipe 3 for heat exchange and then enters the gas-liquid separator 1 through the gas-liquid separator inlet 4. The gas after gas-liquid separation enters the gas-liquid separator outlet 5, passes through the oil return port 9, and returns to the compressor return pipe 7 via siphon oil return. The liquid in the liquid receiver 2, after heat exchange, goes to the evaporator liquid supply pipe 6 for refrigeration recirculation.

[0022] Both the gas-liquid separator 1 and the liquid reservoir 2 are fixedly connected to the bottom with support legs 11, and are also fixedly connected to the outside with lifting rings 13. The support legs 11 are used to support and fix the gas-liquid separator 1 and the liquid reservoir 2, thereby improving stability. Two sight glasses 12 are installed on the liquid reservoir 2, through which the flow status of liquid or gas in the system (such as bubbles, color, impurities) can be directly observed, providing real-time data for the operator.

[0023] Working principle: The mixed refrigerant returning from the evaporator to the compressor first enters the gas-liquid separator 1, where gas-liquid separation is achieved to reduce the risk of liquid return to the compressor and avoid liquid slugging. The separated gas passes through the gas-liquid separator outlet 5, and then returns to the compressor return pipe 7 via the oil return port 9 using siphon oil return. The liquid enters the liquid receiver 2, where the refrigerant liquid in the liquid receiver 2 exchanges heat with the mixed refrigerant in the internal return gas heat exchange pipe 3, increasing the cooling capacity. At the same time, the mixed refrigerant returning from the evaporator return pipe 8 enters the gas-liquid separator 1 and then the liquid receiver 2, where it exchanges heat through the return gas heat exchange pipe 3. After one heat exchange, the gas returns to the gas-liquid separator 1 through the gas-liquid separator inlet 4, and then returns to the compressor through the above process. The other heat-exchanged liquid goes to the evaporator supply pipe 6 for refrigeration and recirculation. In addition, the bottom support legs 11 of the gas-liquid separator 1 and the liquid receiver 2 can support and fix them to improve stability. The sight glass 12 on the liquid receiver 2 can observe the liquid or gas state in the system, providing real-time data for operation.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A refrigeration structure with liquid supply and heat exchange function, comprising a gas-liquid separator (1), wherein a liquid reservoir (2) is installed on one side of the gas-liquid separator (1), characterized in that, Also includes: A return gas heat exchange pipe (3) is installed inside the liquid storage tank (2). A gas-liquid separator inlet (4) is provided on the return gas heat exchange pipe (3). A compressor return gas pipe (7) is installed inside the gas-liquid separator (1). A gas-liquid separator outlet (5) is installed on the compressor return gas pipe (7). An evaporator return gas pipe (8) is installed on the gas-liquid separator (1).

2. The refrigeration structure with liquid supply and heat exchange function according to claim 1, characterized in that: The compressor return pipe (7) is provided with an oil return port (9).

3. A refrigeration structure with liquid supply and heat exchange function according to claim 1, characterized in that: A gas separator plate (10) is installed between the gas-liquid separator (1) and the liquid storage tank (2).

4. A refrigeration structure with liquid supply and heat exchange function according to claim 1, characterized in that: The liquid storage tank (2) is equipped with an evaporator supply pipe (6), and the evaporator supply pipe (6) and the compressor return pipe (7) extend to the outside of the liquid storage tank (2) and the gas-liquid separator (1), respectively.

5. A refrigeration structure with liquid supply and heat exchange function according to claim 1, characterized in that: Both the gas-liquid separator (1) and the liquid storage tank (2) are fixedly connected to the bottom of the support legs (11) and the outer side is fixedly connected to the lifting ring (13).

6. A refrigeration structure with liquid supply and heat exchange function according to claim 1, characterized in that: Two sight glasses (12) are installed on the liquid reservoir (2).

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