An efficient and energy-saving refrigeration system

Abstract

An efficient and energy-saving refrigeration system belongs to the technical field of refrigeration equipment. The present invention solves the problem that the refrigerant in the heat exchange tubes of the heat exchanger in the traditional refrigeration system is in a semi-liquid and semi-vapor state, and the internal heat exchange contact area of the heat exchanger is small, resulting in a low refrigeration efficiency of the refrigeration system. The present invention includes a heat exchanger, a separator, a compressor and a condenser. The heat exchanger is connected to the separator, and the heat exchanger, the compressor and the condenser are connected in sequence to form a loop, and the separator contains refrigerant. Through the refrigeration system of the present invention, it is ensured that the refrigerant delivered by the separator to the heat exchanger is in a full-liquid state, thereby improving the refrigeration efficiency of the refrigeration system.

Description

Technical Field

[0001] The present invention relates to an energy-saving refrigeration system, belonging to the technical field of refrigeration equipment. Background Art

[0002] A refrigeration system is a system that uses external energy to transfer heat from a substance with a lower temperature to a substance with a higher temperature. The refrigeration system can be divided into a vapor refrigeration system, an air refrigeration system, and a thermoelectric refrigeration system. Among them, the vapor refrigeration system can be further divided into vapor compression type, vapor absorption type, and vapor jet type;

[0003] The existing refrigeration systems have the following deficiencies:

[0004] 1. The existing refrigeration system uses a throttling refrigeration heat exchanger. The internal heat exchange tubes of the throttling refrigeration heat exchanger are filled with a semi-liquid-vapor refrigerant, and the heat exchange contact area inside the refrigeration heat exchanger is small, resulting in a low refrigeration efficiency of the refrigeration system;

[0005] 2. The separator of the traditional refrigeration system cannot control the liquid levels of the oil and refrigerant inside it, resulting in too much or too little oil and refrigerant in the separator, affecting the refrigeration effect of the refrigeration system.

[0006] In summary, there is an urgent need for a refrigeration system in which the heat exchange tubes inside the heat exchanger are kept full of liquid, the contact area inside the heat exchanger is large, the heat exchange effect of the refrigeration system is good, and the liquid levels of the oil and refrigerant in the separator can be controlled to solve the above problems. Summary of the Invention

[0007] The present invention solves the problem that the heat exchange tubes of the heat exchanger of the traditional refrigeration system are filled with a semi-liquid-vapor refrigerant, and the heat exchange contact area inside the heat exchanger is small, resulting in a low refrigeration efficiency of the refrigeration system, and further discloses "an energy-efficient refrigeration system". A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0008] The technical solution of the present invention:

[0009] An energy-efficient refrigeration system includes a heat exchanger, a separator, a compressor, and a condenser. The heat exchanger is connected to the separator, and the heat exchanger, the compressor, and the condenser are connected in sequence to form a loop. The separator contains a refrigerant.

[0010] Further, the heat exchanger is a plate heat exchanger.

[0011] Further, a second connecting pipe is connected between the separator and the heat exchanger. The input end of the second connecting pipe is connected to the output end of the separator, and the output end of the second connecting pipe is arranged inside the separator. Refrigerant flows in the second connecting pipe. A first connecting pipe is also arranged inside the heat exchanger. The first connecting pipe exchanges heat with the second connecting pipe inside the heat exchanger, and the first connecting pipe is used to output cold air.

[0012] Further, there is also oil liquid inside the separator, and the density of the oil liquid is less than that of the refrigerant.

[0013] Further, the separator is connected to the compressor through a steam extraction pipe.

[0014] Further, a tray is arranged inside the separator, and an oil leakage port is arranged on the tray. The tray is connected to a siphon pipe, and the siphon pipe is fixedly installed at the inner bottom of the separator. The height of the siphon pipe is higher than the liquid level height of the refrigerant.

[0015] Further, an oil return pipe is arranged inside the siphon pipe. The oil return pipe passes through the separator and is communicated with the steam extraction pipe. The connecting rod of the oil return pipe and the steam extraction pipe is arranged at the end near the compressor.

[0016] Further, a liquid storage tank is arranged between the separator and the condenser.

[0017] Further, a valve is arranged on the connecting pipeline between the liquid storage tank and the separator. A float switch is arranged inside the separator, and the float switch is connected to the valve.

[0018] Further, the heat exchanger is a surface heat exchanger, a regenerative heat exchanger, a shell-and-tube heat exchanger, a jacketed heat exchanger, a spray heat exchanger or an immersed coil heat exchanger.

[0019] Advantages of the present invention:

[0020] 1. For an efficient and energy-saving refrigeration system of the present invention, the gaseous refrigerant is extracted through the steam extraction pipe inside the separator and processed into liquid refrigerant through the compressor and the condenser, ensuring that the heat exchange tubes inside the heat exchanger flow with liquid refrigerant, increasing the heat exchange contact area inside the heat exchanger, and thus improving the refrigeration effect of the refrigeration system;

[0021] 2. The separator of an efficient and energy-saving refrigeration system of the present invention controls the liquid level height of the refrigerant inside it through the float switch and the valve, avoiding the influence of too much or too little refrigerant inside the separator on the refrigeration effect of the refrigeration system;

[0022] 3. The combined use of the tray and the siphon pipe arranged inside the separator of an efficient and energy-saving refrigeration system of the present invention avoids too much oil liquid inside the separator and ensures that the liquid level height of the oil liquid inside the separator is lower than the tray. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of an energy-efficient refrigeration system;

[0024] Figure 2 is Figure 1 a partial schematic diagram of.

[0025] 1 - Heat exchanger, 2 - First connecting pipe, 3 - Second connecting pipe, 4 - Separator, 5 - Refrigerant, 6 - Oil, 7 - Tray, 8 - Return oil pipe, 9 - Float switch, 10 - Valve, 11 - Steam extraction pipe, 12 - Compressor, 13 - Condenser, 14 - Liquid storage tank, 15 - Siphon tube. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described below through specific embodiments shown in the drawings. However, it should be understood that these descriptions are exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0027] Specific embodiment one: In combination with Figure 1 - Figure 2 This embodiment is described. An energy-efficient refrigeration system according to this embodiment includes a heat exchanger 1, a separator 4, a compressor 12, and a condenser 13. The heat exchanger 1 is connected to the separator 4. The heat exchanger 1, the compressor 12, and the condenser 13 are connected in sequence to form a loop. The separator 4 contains a refrigerant 5. The refrigerant 5 in the separator 4 is transported to the heat exchanger 1 for heat exchange. After heat exchange, the refrigerant 5 flows back into the separator 4. The refrigerant 5 after heat exchange is divided into gaseous refrigerant and liquid refrigerant. The gaseous refrigerant is input into the compressor 12 for compression. After compression, it enters the condenser 13 for condensation. The condensed liquid refrigerant flows into the separator 4 to provide heat exchange for the heat exchanger 1. After heat exchange, the heat exchanger 1 outputs cold air to the outside.

[0028] Specific embodiment two: In combination with Figure 1 - Figure 2Description of this embodiment: An efficient energy-saving refrigeration system of this embodiment. The heat exchanger 1 is a plate heat exchanger. A second connecting pipe 3 is connected between the separator 4 and the heat exchanger 1. The input end of the second connecting pipe 3 is connected to the output end of the separator 4, and the output end of the second connecting pipe 3 is arranged inside the separator 4. A refrigerant 5 flows in the second connecting pipe 3. A first connecting pipe 2 is also arranged inside the heat exchanger 1. The first connecting pipe 2 exchanges heat with the second connecting pipe 3 inside the heat exchanger 1. The first connecting pipe 2 is used to output cold air. On the basis of the specific embodiment 1, when the heat exchanger 1 adopts a plate heat exchanger, the separator 4 and the heat exchanger 1 are connected through pipelines. After the first connecting pipe 2 and the second connecting pipe 3 exchange heat inside the heat exchanger 1, cold air is conveyed to the outside. The second connecting pipe 3 is used to convey the refrigerant 5 inside the separator 4 to exchange heat inside the heat exchanger 1, and then the heat-exchanged refrigerant 5 is conveyed back into the separator 1.

[0029] Specific embodiment three: Combining Figure 1 - Figure 2 Description of this embodiment: An efficient energy-saving refrigeration system of this embodiment. There is also an oil liquid 6 inside the separator 4. The density of the oil liquid 6 is less than that of the refrigerant 5. Since the density of the oil liquid 6 is less than that of the refrigerant 5, the oil liquid 6 floats above the refrigerant 5. The function of the oil liquid 6 is to separate the gaseous refrigerant and the liquid refrigerant inside the separator 4, ensuring that the gaseous refrigerant and the liquid refrigerant do not mix, so that the refrigerant 5 input into the heat exchanger 1 is a full-liquid refrigerant, improving the refrigeration effect.

[0030] Specific embodiment four: Combining Figure 1 - Figure 2 Description of this embodiment: An efficient energy-saving refrigeration system of this embodiment. The separator 4 and the compressor 12 are connected through a steam extraction pipe 11. The steam extraction pipe 11 extracts the gaseous refrigerant inside the separator 4 into the compressor 12, making the inside of the separator 4 in a negative pressure state.

[0031] Specific embodiment five: Combining Figure 1 - Figure 2 Description of this embodiment: An efficient energy-saving refrigeration system of this embodiment. A tray 7 is arranged inside the separator 4. An oil leakage port is arranged on the tray 7. The tray 7 is connected to a siphon pipe 15. The siphon pipe 15 is fixedly installed at the inner bottom of the separator 4. The height of the siphon pipe 15 is higher than the liquid level height of the refrigerant 5. When the oil liquid 6 inside the separator 4 submerges the tray 7, the oil liquid 6 leaks from the oil leakage port of the tray 7 to the lower part of the tray 7.

[0032] Specific embodiment six: Combining Figure 1 - Figure 2Description of this embodiment. An energy-efficient refrigeration system of this embodiment. An oil return pipe 8 is provided in the siphon tube 15. The oil return pipe 8 passes through the separator 4 and is communicated with the steam extraction pipe 11. The connecting rod of the oil return pipe 8 and the steam extraction pipe 11 is arranged at the end near the compressor 12. Based on the fifth specific embodiment, an oil return pipe 8 is provided in the siphon tube 15. When there is too much oil liquid 6 in the separator 4, the oil liquid 6 leaks into the siphon tube 15 through the oil leakage port of the tray 7, and part of the oil liquid 6 is transported into the compressor 12 through the oil return pipe 8.

[0033] Specific embodiment seven: Combining Figure 1 - Figure 2 Description of this embodiment. An energy-efficient refrigeration system of this embodiment. A liquid storage tank 14 is provided between the separator 4 and the condenser 13. Adding a liquid storage tank 14 between the separator 4 and the condenser 13 to prevent excessive refrigerant 5 from affecting the normal operation of the system. The liquid storage tank 14 is used to store the refrigerant 5 condensed by the condenser 13.

[0034] Specific embodiment eight: Combining Figure 1 - Figure 2 Description of this embodiment. An energy-efficient refrigeration system of this embodiment. A valve 10 is provided on the pipeline connecting the liquid storage tank 14 and the separator. A float switch 9 is provided in the separator 4. The float switch 9 is connected to the valve 10. When the liquid level height of the refrigerant 5 in the separator 4 exceeds the float switch 9, the float switch 9 drives the valve 10 to close, and the refrigerant 5 in the liquid storage tank 14 no longer transports into the separator 4. When the liquid level height of the refrigerant 5 in the separator 4 is lower than the float switch 9, the float switch 9 drives the valve 10 to open, and the refrigerant 5 in the liquid storage tank 14 transports into the separator 4.

[0035] Specific embodiment nine: Combining Figure 1 - Figure 2 Description of this embodiment. An energy-efficient refrigeration system of this embodiment. The heat exchanger 1 is a shell-and-tube heat exchanger. The separator 4 is connected to the shell-and-tube heat exchanger. The refrigerant 5 in the separator 4 is input into the shell-and-tube heat exchanger and forms heat exchange in the shell-and-tube heat exchanger. The refrigerant 5 after heat exchange flows back into the separator 4, and the shell-and-tube heat exchanger provides cold air to the outside.

[0036] Specific embodiment ten: Combining Figure 1 - Figure 2 Description of this embodiment. An energy-efficient refrigeration system of this embodiment. The heat exchanger 1 is a surface heat exchanger, a regenerative heat exchanger, a jacket heat exchanger, a spray heat exchanger or an immersed coil heat exchanger.

[0037] It should be noted that the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof in subsequent drawings is not necessary.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0040] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the attached drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "on" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations will be made for the spatial relative descriptions used here.

[0041] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0042] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permutated and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutation and combination. Therefore, the present invention will not describe the technical solutions after permutation and combination one by one, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.

[0043] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An efficient and energy-saving refrigeration system, characterized in that: It includes a heat exchanger (1), a separator (4), a compressor (12) and a condenser (13). The heat exchanger (1) is connected to the separator (4). The heat exchanger (1), the compressor (12) and the condenser (13) are connected in sequence to form a loop. There is a refrigerant (5) in the separator (4). There is also an oil liquid (6) in the separator (4), and the density of the oil liquid (6) is less than that of the refrigerant (5). The separator (4) is connected to the compressor (12) through a steam extraction pipe (11). A tray (7) is arranged in the separator (4), and an oil leakage port is arranged on the tray (7). The tray (7) is connected to a siphon pipe (15). The siphon pipe (15) is fixedly installed at the inner bottom of the separator (4), and the height of the siphon pipe (15) is higher than the liquid level height of the refrigerant (5). A return oil pipe (8) is arranged in the siphon pipe (15), and the return oil pipe (8) passes through the separator (4) and communicates with the steam extraction pipe (11). The connection point of the return oil pipe (8) and the steam extraction pipe (11) is arranged at the end near the compressor (12). The heat exchanger (1) is a shell-and-tube heat exchanger, a jacketed heat exchanger, a spray heat exchanger or an immersed coil heat exchanger.

2. An efficient energy-saving refrigeration system according to claim 1, characterized in that: The heat exchanger (1) is a plate heat exchanger.

3. An efficient energy-saving refrigeration system according to claim 2, characterized in that: A second connecting pipe (3) is connected between the separator (4) and the heat exchanger (1). The input end of the second connecting pipe (3) is connected to the output end of the separator (4), and the output end of the second connecting pipe (3) is arranged in the separator (4). The refrigerant (5) flows in the second connecting pipe (3). A first connecting pipe (2) is also arranged in the heat exchanger (1). The first connecting pipe (2) exchanges heat with the second connecting pipe (3) in the heat exchanger (1), and the first connecting pipe (2) is used to output cold air.

4. An efficient energy-saving refrigeration system according to claim 1, characterized in that: A liquid storage tank (14) is arranged between the separator (4) and the condenser (13).

5. An efficient energy-saving refrigeration system according to claim 4, characterized in that: A valve (10) is arranged on the connecting pipeline between the liquid storage tank (14) and the separator. A float switch (9) is arranged in the separator (4), and the float switch (9) is connected to the valve (10).

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