A refrigeration system with powerful liquid / vapor injection function

Abstract

This invention discloses a refrigeration system with a powerful liquid / vapor injection function, comprising: a condenser, an evaporator, an expansion valve, and a compressor. The compressor, condenser, expansion valve, evaporator, and compressor are connected sequentially to form a main circuit for completing the refrigeration or heating process. The refrigeration system also includes a refrigerant pump, which pumps liquid or vapor refrigerant condensed by the condenser into the compression chamber of the compressor. This invention's refrigerant pump, condenser, and compressor form a cooling circuit that forcibly injects refrigerant into the compressor's compression chamber at specific times, and the injection pressure is controllable.

Description

Technical Field

[0001] This invention belongs to the field of refrigeration technology, specifically relating to a refrigeration system with a powerful liquid / vapor injection function. Background Technology

[0002] Traditional refrigerant injection systems, whether liquid or vapor, only utilize the pressure difference between the condenser and the compressor's compression chamber to inject refrigerant into the compression chamber. They cannot inject refrigerant into the exhaust chamber, and the amount of refrigerant injected is limited by the pressure difference between the condenser and the compression chamber and the diameter of the passage, resulting in a generally poor injection effect. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a refrigeration system with a powerful liquid / vapor injection function.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows:

[0005] A refrigeration system with a powerful liquid / vapor injection function includes: a condenser, an evaporator, an expansion valve, and a compressor. The compressor, condenser, expansion valve, evaporator, and compressor are connected in sequence to form a main circuit for completing the refrigeration or heating process. The refrigeration system also includes a refrigerant pump, which pumps the liquid or vapor refrigerant condensed by the condenser into the compression chamber of the compressor.

[0006] This invention discloses a refrigeration system with a powerful liquid / vapor injection function. The refrigerant pump, condenser, and compressor form a liquid / vapor supply circuit that forces refrigerant into the compressor's compression chamber at specific times. This invention can effectively improve the refrigeration effect of the entire refrigeration system, significantly enhancing its cooling performance.

[0007] Based on the above technical solution, the following improvements can be made:

[0008] As a preferred embodiment, the refrigerant pump is connected to the subcooler, and the refrigerant pump pumps the liquid or gaseous refrigerant that has passed through the subcooler into the compression chamber of the compressor.

[0009] Using the preferred scheme described above, the subcooler can cool down the liquid or gaseous refrigerant injected into the compressor.

[0010] As a preferred embodiment, the compressor is equipped with a refrigerant pipe, one end of which is connected to the compressor compression chamber, and the other end is connected to a refrigerant pump, which pumps gaseous or liquid refrigerant into the compressor compression chamber.

[0011] By adopting the above-mentioned preferred solution, refrigerant can be injected into the compressor compression chamber quickly and effectively.

[0012] As a preferred embodiment, a pressure gauge and a pressure sensor are installed on the refrigerant pipe. The pressure sensor is connected to the refrigerant pump, and the refrigerant pump adjusts its output pressure and flow rate according to the pressure value collected by the pressure sensor and the discharge pressure of the compressor.

[0013] By adopting the above-mentioned preferred scheme, the pressure value of the refrigerant pipe can be controlled.

[0014] As a preferred embodiment, the refrigerant pump can pump gaseous or liquid refrigerant into the compressor exhaust chamber, which is a cavity that is connected to the compressor exhaust passage and close to the compressor compression mechanism.

[0015] By adopting the above-mentioned preferred scheme, the exhaust temperature is further reduced.

[0016] As a preferred embodiment, the injection quantity and injection pressure of the refrigerant injected into the compression chamber and / or exhaust chamber can be adjusted by a refrigerant pump.

[0017] The preferred solution described above is used, and the refrigerant is regulated by a refrigerant pump.

[0018] As a preferred option, the refrigerant pump is one or more of the following: variable speed pump, constant speed pump, fixed displacement pump, and variable displacement pump.

[0019] The preferred schemes described above are selected based on specific requirements.

[0020] As a preferred option, the compressor can be a scroll compressor, a rotary compressor, or a screw compressor.

[0021] With the above-mentioned preferred scheme, this refrigeration system has a wide range of applications.

[0022] As a preferred embodiment, when the compressor is a scroll compressor, the scroll compressor includes: a housing, a moving scroll, a stationary scroll, and a drive assembly. A compression chamber is formed between the moving scroll and the stationary scroll. The moving scroll, the stationary scroll, and the drive assembly are disposed inside the housing. A refrigerant passage is provided on the stationary scroll. One end of the refrigerant passage is connected to a refrigerant pipe, and the other end is connected to the inlet of the compression chamber. The refrigerant pipe is connected to a refrigerant pump.

[0023] Using the above-mentioned preferred scheme, when the compressor is a scroll compressor, the structure is simple and the refrigerant can be smoothly injected into the compressor's compression chamber.

[0024] As a preferred embodiment, when the compressor is a scroll compressor, the scroll compressor includes: a housing, a moving scroll, a stationary scroll, and a drive assembly. A compression chamber is formed between the moving scroll and the stationary scroll. The moving scroll, the stationary scroll, and the drive assembly are disposed within the housing. A refrigerant passage is provided on the stationary scroll. One end of the refrigerant passage is connected to a refrigerant pipe, and the other end is connected to the inlet of the compression chamber and the compressor exhaust port, respectively. The refrigerant pipe is connected to a refrigerant pump.

[0025] Using the above-mentioned preferred scheme, when the compressor is a scroll compressor, the structure is simple and the refrigerant can be smoothly pumped into the compressor's exhaust chamber. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural block diagram of a refrigeration system with a powerful liquid / vapor injection function provided in an embodiment of the present invention.

[0028] Figure 2 This is one of the structural schematic diagrams of a compressor provided in an embodiment of the present invention.

[0029] Figure 3 This is a second schematic diagram of the compressor provided in an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the connection component provided in an embodiment of the present invention.

[0031] Figure 5 Left view of the connection component provided in an embodiment of the present invention.

[0032] Figure 6 Right view of the connection component provided in an embodiment of the present invention.

[0033] Figure 7 This is a schematic diagram of the connection between the connecting component and the refrigerant channel provided in an embodiment of the present invention.

[0034] Wherein: 1-compressor, 11-casing, 12-moving scroll plate, 13-stationary scroll plate, 14-drive assembly, 15-refrigerant passage, 2-condenser, 3-expansion valve, 4-evaporator, 5-refrigerant receiver, 6-refrigerant pipe, 7-refrigerant pump, 8-subcooler, 9-pressure gauge, 10-connecting assembly, 101-first connecting pipe, 102-second connecting pipe, 103-internal thread, 104-reinforcing assembly. Detailed Implementation

[0035] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] To achieve the objectives of this invention, some embodiments of a refrigeration system with a powerful liquid / vapor injection function, such as Figure 1 As shown, a refrigeration system with a powerful liquid / vapor injection function includes: a condenser 2, an evaporator 4, an expansion valve 3, and a compressor 1. The compressor 1, condenser 2, expansion valve 3, evaporator 4, and compressor 1 are connected in sequence to form a main circuit for completing the refrigeration or heating process. The refrigeration system also includes a refrigerant pump 7, which pumps the liquid or vapor refrigerant condensed by the condenser 2 into the compression chamber of the compressor 1.

[0038] The refrigerant is stored in the refrigerant storage tank 5.

[0039] This invention discloses a refrigeration system with a powerful liquid / vapor injection function. The refrigerant pump 7, condenser 2, and compressor 1 form a cooling circuit that forces refrigerant to be injected into the compression chamber of compressor 1 at specific times. The compression chamber of compressor 1 refers to the non-intake chamber and the sealed chamber that is isolated from the intake and exhaust chambers and tends to lead to the high-pressure exhaust chamber.

[0040] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the refrigerant pump 7 is connected to the subcooler 8, and the refrigerant pump 7 pumps the liquid or gaseous refrigerant that has passed through the subcooler 8 into the compression chamber of the compressor 1.

[0041] Using the above-mentioned preferred scheme, the subcooler 8 can cool the liquid or gaseous refrigerant injected into the compressor. The cold source input of the subcooler 8 can be the cold end circuit of the system in this application or it can come from an external independent system.

[0042] like Figure 2 As shown, in order to further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the compressor 1 is provided with a refrigerant pipe 6, one end of the refrigerant pipe 6 is connected to the compression chamber of the compressor 1, and the other end is connected to the refrigerant pump 7, which pumps gaseous or liquid refrigerant into the compression chamber of the compressor 1.

[0043] By adopting the above-mentioned preferred scheme, refrigerant can be quickly and effectively injected into the compression chamber of compressor 1.

[0044] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining technical features are the same, except that a pressure gauge 9 and a pressure sensor are provided on the refrigerant pipe 6. The pressure sensor is electrically connected to the refrigerant pump, and the refrigerant pump adjusts its output pressure and flow rate according to the pressure value collected by the pressure sensor.

[0045] By adopting the above-mentioned preferred scheme, the pressure value of refrigerant pipe 6 can be controlled.

[0046] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the refrigerant pump 7 can pump gaseous or liquid refrigerant into the compressor exhaust chamber, which is a part of the chamber that can communicate with the compressor exhaust passage and is close to the compressor compression mechanism.

[0047] By adopting the above-mentioned preferred solution, the exhaust temperature is further reduced. It is worth noting that, in this invention, the area referred to as the compressor exhaust chamber is the area connected to the exhaust port.

[0048] Moreover, traditional injection methods require compression to inject refrigerant into the intake or intermediate pressure chamber. However, the invention uses a refrigerant pump 7 to pump gaseous or liquid refrigerant into the compressor exhaust chamber, eliminating the need for compression and avoiding wear caused by oil film dilution during the compression process. This has produced unexpected and beneficial effects.

[0049] Furthermore, based on the above embodiments, the injection quantity and injection pressure of the refrigerant injected into the compression chamber and / or exhaust chamber can be adjusted by the refrigerant pump 7.

[0050] Using the preferred scheme described above, the injection volume and injection pressure can be controlled by the refrigerant pump.

[0051] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the refrigerant pump 7 is one or more of a variable speed pump, a constant speed pump, a fixed displacement pump, and a variable displacement pump.

[0052] The preferred schemes described above are selected based on specific requirements.

[0053] The above-mentioned implementation methods can be carried out in parallel or in a cross-cutting manner.

[0054] The compressor 1 described above may be, but is not limited to, a scroll compressor, a rotary compressor, or a screw compressor, and may also be other types of compressors. This invention does not impose any limitations.

[0055] The following description uses a scroll compressor as an example.

[0056] like Figure 2As shown, in some embodiments, when the compressor 1 is a scroll compressor, the compressor includes: a housing 11, a moving scroll 12, a stationary scroll 13, and a drive assembly 14. A compression chamber is formed between the moving scroll 12 and the stationary scroll 13. The moving scroll 12, the stationary scroll 13, and the drive assembly 14 are disposed inside the housing 11. A refrigerant passage 15 is provided on the stationary scroll 13. One end of the refrigerant passage 15 is connected to the refrigerant pipe 6, and the other end is connected to the inlet of the compression chamber. The refrigerant pipe 6 is connected to the refrigerant pump 7.

[0057] When the compressor is a scroll compressor, the structure is simple and the refrigerant can be smoothly pumped into the compressor's compression chamber.

[0058] like Figure 3 As shown, in some other embodiments, when the compressor 1 is a scroll compressor, the compressor includes: a housing 11, a moving scroll 12, a stationary scroll 13, and a drive assembly 14. A compression chamber is formed between the moving scroll 12 and the stationary scroll 13. The moving scroll 12, the stationary scroll 13, and the drive assembly 14 are disposed inside the housing 11. A refrigerant passage 15 is provided on the stationary scroll 13. One end of the refrigerant passage 15 is connected to the refrigerant pipe 6, and the other end is connected to the inlet of the compression chamber and the compressor exhaust port, respectively. The refrigerant pipe 6 is connected to the refrigerant pump 7.

[0059] When the compressor is a scroll compressor, the structure is simple and the refrigerant can be smoothly pumped into the compressor's exhaust chamber, resulting in better cooling performance.

[0060] like Figure 4-7 Furthermore, the refrigerant pipe 6 is connected to the refrigerant channel 15 via a connecting component 10, the connecting component 10 comprising:

[0061] The first connecting pipe 101 has one end connected to the refrigerant pipe 6 via its internal thread 103, and the other end connected to the second connecting pipe 102. The internal structure of the first connecting pipe is such that, along the refrigerant transmission direction, the cross-section of its internal cavity transitions from a circle to a flat rectangle.

[0062] The second connecting pipe 102 is used to connect the first connecting pipe 101 and the refrigerant channel 15.

[0063] Using the aforementioned connection component 10 allows the refrigerant to be delivered more smoothly and quickly to the corresponding compression chamber and / or exhaust chamber.

[0064] Furthermore, the inner wall of the second connecting pipe 102 is smooth and rounded, and the diameter at its outlet is larger than the diameter at its inlet, ensuring the smooth transmission of refrigerant.

[0065] Furthermore, the first connecting pipe 101 and the second connecting pipe 102 are connected by a reinforcing component 104 to ensure the connection strength between the two.

[0066] To better demonstrate the beneficial effects of the compressor with powerful liquid / vapor injection function of this invention, the experimental results are shown in Table 1, under the premise that the compressor suction temperature, suction pressure, and discharge temperature are consistent. (The experimental machine used was a "Weishan" brand WF09KM scroll compressor for comparison.)

[0067] Table 1 Comparison of Exhaust Pressure

[0068]

[0069] Table 1 shows that the compressor with powerful liquid / vapor injection function of this invention has a higher discharge pressure (condensing pressure) than that of a conventional liquid injection compressor. Under the same suction pressure and suction temperature, the higher the condensing pressure the compressor can operate at, the wider its operating range.

[0070] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A refrigeration system with a powerful liquid / vapor injection function, comprising: The system comprises a condenser, an evaporator, an expansion valve, and a compressor, wherein the compressor, condenser, expansion valve, evaporator, and compressor are connected in sequence to form a main circuit for completing a refrigeration or heating process. The refrigeration system further comprises a refrigerant pump, which is capable of pumping liquid or gaseous refrigerant condensed by the condenser into the compression chamber of the compressor. The compressor is equipped with a refrigerant pipe, one end of which is connected to the compressor chamber and the other end is connected to the refrigerant pump. The compressor exhaust chamber is a portion of the cavity that can communicate with the compressor exhaust passage and is close to the compressor compression mechanism; The injection volume and injection pressure of the refrigerant injected into the compression chamber can be adjusted by the refrigerant pump; A pressure gauge and a pressure sensor are installed on the refrigerant pipe. The pressure sensor is connected to the refrigerant pump. The refrigerant pump adjusts its output pressure and flow rate according to the pressure value collected by the pressure sensor and the discharge pressure of the compressor. The refrigerant pump is connected to the subcooler, and the refrigerant pump pumps the liquid or gaseous refrigerant that has passed through the subcooler into the compression chamber of the compressor. The compressor is a scroll compressor, which includes: a housing, a moving scroll plate, a stationary scroll plate, and a drive assembly. A compression chamber is formed between the moving scroll plate and the stationary scroll plate. The moving scroll plate, the stationary scroll plate, and the drive assembly are disposed inside the housing. A refrigerant passage is provided on the stationary scroll plate. One end of the refrigerant passage is connected to a refrigerant pipe, and the other end is connected to the inlet of the compression chamber. The refrigerant pipe is connected to the refrigerant pump. The refrigerant pipe is connected to the refrigerant channel via a connecting assembly. The connecting assembly includes a first connecting pipe and a second connecting pipe. The inner cavity structure of the first connecting pipe is along the refrigerant transmission direction. The second connecting pipe is used to connect the first connecting pipe and the refrigerant channel. The inner wall of the second connecting pipe is smooth and rounded, and the diameter at its outlet is larger than the diameter at its inlet.

2. The refrigeration system with powerful liquid / vapor injection function according to claim 1, characterized in that, The refrigerant pump is one or more of the following: variable speed pump, constant speed pump, fixed displacement pump, and variable displacement pump.

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