Air conditioning system

Abstract

The present invention provides an air conditioning system. The air conditioning system comprises a compressor, the compressor has at least one exhaust hole, the total cross-sectional area of ​​the air flow of the at least one exhaust hole is S, the displacement of the compressor is V, and the rated cooling capacity of the air conditioning system is Q; wherein k=V / (S*Q), k≥3.6. The air conditioning system of the present invention solves the problem of poor reliability of the compressor in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of air-conditioning equipment, and in particular to an air-conditioning system. Background Art

[0002] With the implementation of the new national energy efficiency standards for refrigeration and air conditioning, the requirements for energy efficiency and cost of compressors and air conditioning systems are getting higher and higher, and the demand for miniaturization and high speed of compressors and their corresponding air conditioning systems is becoming stronger and stronger. As the core component of the air conditioning system, variable frequency compressors have developed rapidly in recent years. Through variable frequency control, small series compressors can be operated at high speed to match large-capacity air conditioning systems.

[0003] However, when miniaturized compressors run at high speeds, the performance, noise and reliability of the compressors are key and difficult issues in the design, and are also common difficult issues that plague the development of the industry. Summary of the invention

[0004] The main purpose of the present invention is to provide an air conditioning system to solve the problem of poor reliability of the compressor in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an air-conditioning system, including a compressor, the compressor having at least one exhaust hole, the total cross-sectional area of ​​the air flow of at least one exhaust hole is S, the displacement of the compressor is V, and the rated cooling capacity of the air-conditioning system is Q; wherein k=V / (S*Q), k≥3.6.

[0006] Furthermore, k≤8.

[0007] Furthermore, 4.7≤k≤6.7.

[0008] Furthermore, 5.3≤k≤6.7.

[0009] Further, k=6.24.

[0010] Furthermore, the compressor is a variable frequency compressor, and the frequency of the variable frequency compressor is 10 Hz to 200 Hz.

[0011] Further, the compressor includes a cylinder assembly, and at least one exhaust hole is arranged on the cylinder assembly.

[0012] Furthermore, the cylinder assembly includes at least one cylinder, and each cylinder is provided with at least one exhaust hole.

[0013] Furthermore, each cylinder is provided with at least two exhaust holes, and the air flow cross-sectional areas of each exhaust hole are not equal.

[0014] Furthermore, the compressor has at least two exhaust holes, and the air flow cross-sectional areas of the exhaust holes are equal.

[0015] The air conditioning system of the present invention includes a compressor, the compressor has at least one exhaust hole, the sum of the cross-sectional areas of the air flow of the at least one exhaust hole is S, the displacement of the compressor is V, and the rated cooling capacity of the air conditioning system is Q; wherein, k=V / (S*Q), k≥3.6. When the k value is less than 3.6, the displacement V is too small, the sum of the cross-sectional areas of the air flow of the exhaust holes S is also correspondingly small, the compressor operating frequency is too high, the maximum impact velocity of the air valve increases, the reliability of the air valve decreases, the compressor performance decreases and there is a reliability problem. The air conditioning system avoids the above problems by setting k=V / (S*Q)≥3.6. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A cross-sectional view showing a compressor of an air conditioning system according to the present invention;

[0018] Figure 2 Shows Figure 1 A cross-sectional view of a compressor in FIG.

[0019] Figure 3 shows a schematic diagram of an air conditioning system according to the present invention;

[0020] Figure 4 The relationship curve between the maximum impact velocity of the gas valve and the compressor cost and k of the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. compressor; 20. exhaust hole; 30. cylinder assembly; 40. cylinder; 50. valve;

[0023] 2. Condenser; 3. Throttling device; 4. Evaporator. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments 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 form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] The present invention provides an air conditioning system, please refer to Figures 1 to 4 , including a compressor 10, the compressor 10 has at least one exhaust hole 20, the sum of the air flow cross-sectional areas of the at least one exhaust hole 20 is S, the displacement of the compressor 10 is V, and the rated cooling capacity of the air conditioning system is Q; wherein, k=V / (S*Q), k≥3.6.

[0028] The air conditioning system of the present invention comprises a compressor 10, the compressor 10 has at least one exhaust hole 20, the sum of the cross-sectional areas of the air flow of the at least one exhaust hole 20 is S, the displacement of the compressor 10 is V, and the rated cooling capacity of the air conditioning system is Q; wherein, k=V / (S*Q), k≥3.6. When the k value is less than 3.6, the displacement V is too small, the sum of the cross-sectional areas of the air flow of the exhaust hole 20 is S, and the compressor operation frequency is too high, the maximum impact velocity of the air valve increases, the reliability of the air valve decreases, the compressor performance decreases and there is a reliability problem. The air conditioning system avoids the above problems by setting k=V / (S*Q)≥3.6.

[0029] Where V is in cm 3 / rev (cubic centimeters / rev), S is in m 2 , Q unit is W.

[0030] Specifically, the value range of Q is 2300W to 30000W.

[0031] In this embodiment, k≤8. When the k value exceeds 8, V is designed to be too large, the compressor volume increases, the cost increases, and the miniaturization and low-cost design requirements are not met.

[0032] Optionally, 4.7≤k≤6.7. In this case, the maximum impact velocity of the gas valve is less than 11 m / s, the compressor has better reliability and lower cost.

[0033] Optionally, 5.3≤k≤6.7. In this case, the maximum impact velocity of the gas valve is less than 10 m / s, the compressor has better reliability and lower cost.

[0034] Optionally, k = 6.24. In this case, the overall performance of the compressor and the air conditioning system is good.

[0035] In this embodiment, the compressor 10 is a variable frequency compressor, and the frequency of the variable frequency compressor is 10 Hz to 200 Hz. The operating frequency of a conventional compressor is below 120 Hz, and the compressor of the present application is a high operating frequency compressor.

[0036] In this embodiment, the compressor 10 includes a cylinder assembly 30 , and at least one exhaust hole 20 is disposed on the cylinder assembly 30 .

[0037] In this embodiment, the cylinder assembly 30 includes at least one cylinder 40 , and each cylinder 40 is provided with at least one exhaust hole 20 .

[0038] In this embodiment, each cylinder 40 is provided with at least two exhaust holes 20 , and the airflow cross-sectional areas of each exhaust hole 20 are not equal. Such a setting can achieve different exhaust pressures in the cylinder 40 .

[0039] In this embodiment, the compressor has at least two exhaust holes 20, and the air flow cross-sectional areas of the exhaust holes 20 are equal. Such an arrangement facilitates the processing of the compressor.

[0040] In this embodiment, the air conditioning system further includes a condenser 2 , a throttling device 3 and an evaporator 4 .

[0041] In this embodiment, the compressor further includes at least one air valve 50 , and a plurality of air valves 50 are provided in one-to-one correspondence with a plurality of exhaust holes 20 , and each air valve 50 is used to open or close a corresponding exhaust hole 20 .

[0042] This application mainly aims at the design innovation of the problems of poor reliability, low performance and high cost of compressors in the high-speed, miniaturized and low-cost design of compressors. For air-conditioning systems with different rated cooling capacities Q, when determining the rated cooling capacity Q of the air-conditioning system, the matching relationship between V and S is studied through high-speed and miniaturized design. The technical solution and parameter design range of the present invention determined by a large number of experimental tests and simulation calculations can ensure the reliability, energy efficiency and cost requirements of the compressor and air-conditioning system when running at high speed.

[0043] In order to reduce the cost of air-conditioning systems, variable frequency compressors and air-conditioning systems are currently tending to be designed in a high-speed and miniaturized manner. After the compressor is miniaturized, the maximum operating frequency can reach more than 200Hz. At this time, there will be many technical difficulties in the design of the compressor, mainly including poor valve reliability, increased noise and serious performance degradation. After the rated cooling capacity of the air-conditioning system is determined, the smaller the displacement, the smaller the air flow cross-sectional area of ​​the exhaust hole, the higher the compressor operating frequency, the greater the maximum impact velocity of the valve, and there is a problem of valve reliability. In order to effectively solve the above problems and ensure that the compressor meets the design and cost requirements when it runs at high frequency, through a large number of simulation and experimental results, it is found that after the rated cooling capacity Q of the air-conditioning system is determined, when the k value exceeds 8, the V design is too large, the compressor volume increases, the cost increases, and the miniaturized low-cost design requirements are not met. When the k value is less than 3.6, the V design is too small, and S will also be correspondingly small. The compressor operating frequency is too high, the maximum impact velocity of the valve increases, the valve reliability is reduced, the compressor performance is reduced, and there are reliability problems.

[0044] Specifically, Figure 4 As shown in the figure, when the maximum impact velocity V1 of the air valve exceeds 12m / s, the air valve will break after a long-term reliability test. When V is too small and the operating frequency is too high, the exhaust velocity of the air valve increases. After reaching a certain limit, the air valve breaks and reliability problems occur. According to the reliability requirements, the minimum value of k is 3.6.

[0045] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0046] The air conditioning system of the present invention comprises a compressor 10, the compressor 10 has at least one exhaust hole 20, the sum of the cross-sectional areas of the air flow of the at least one exhaust hole 20 is S, the displacement of the compressor 10 is V, and the rated cooling capacity of the air conditioning system is Q; wherein, k=V / (S*Q), k≥3.6. When the k value is less than 3.6, the displacement V is too small, the sum of the cross-sectional areas of the air flow of the exhaust hole 20 is S, and the compressor operation frequency is too high, the maximum impact velocity of the air valve increases, the reliability of the air valve decreases, the compressor performance decreases and there is a reliability problem. The air conditioning system avoids the above problems by setting k=V / (S*Q)≥3.6.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air conditioning system, characterized in that: Comprising a compressor (10), the compressor (10) having at least one exhaust hole (20), the total cross-sectional area of ​​air flow of the at least one exhaust hole (20) being S, the displacement of the compressor (10) being V, and the rated refrigeration capacity of the air conditioning system being Q; Where k = V / (S*Q), 3.6≤k≤8, V is in cm 3 / rev, S unit is m 2 , Q unit is W; The compressor (10) comprises a cylinder assembly (30), wherein the at least one exhaust hole (20) is arranged on the cylinder assembly (30); the cylinder assembly (30) comprises at least one cylinder (40), wherein each cylinder (40) is provided with at least one exhaust hole (20).

2. The air conditioning system according to claim 1, characterized in that: 4.7≤k≤6.7。 3. The air conditioning system according to claim 1, characterized in that: 5.3≤k≤6.7。 4. The air conditioning system according to claim 1, characterized in that: k=6.24。 5. The air conditioning system according to claim 1, characterized in that: The compressor (10) is a variable frequency compressor, and the frequency of the variable frequency compressor is 10 Hz to 200 Hz.

6. The air conditioning system according to claim 1, characterized in that: Each of the cylinders (40) is provided with at least two exhaust holes (20), and the airflow cross-sectional areas of the exhaust holes (20) are not equal.

7. The air conditioning system according to any one of claims 1 to 5, characterized in that: The compressor has at least two exhaust holes (20), and the air flow cross-sectional areas of the exhaust holes (20) are equal.

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