Compressor and air conditioner having the same

Abstract

The present invention provides a compressor and an air conditioner having the same. The compressor includes a housing; a pump body assembly disposed within the housing, and the pump body assembly includes a cylinder; wherein, the outer diameter of the housing is D, the total displacement of the compressor is V, the refrigerating capacity of the compressor under the condition of the highest frequency is Q, and 8 < Q / V / D < 15. By setting the ratio relationship among the total displacement of the compressor, the refrigerating capacity of the compressor under the condition of the highest frequency, and the inner diameter of the compressor, such a setting enables the compressor to achieve a miniaturized design, that is, the compressor can achieve a large cooling capacity output with a relatively small displacement. Under the condition that the volume of the compressor remains unchanged, the capacity of the compressor is significantly improved, thereby effectively realizing the miniaturized application of the compressor in the air conditioning system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and more particularly, to a compressor and an air conditioner having the same. Background Art

[0002] As the core component of a variable-frequency air conditioner, the variable-frequency rotary compressor has witnessed rapid development in the past decade or so. It can achieve the change of the compressor volume with the load through variable-frequency control, significantly improving the seasonal energy efficiency ratio of the air-conditioning system and the thermal comfort at low ambient temperatures.

[0003] With the development of new materials and new technologies, the demand for miniaturization and high efficiency of air-conditioning systems is increasing. Based on the overall development trend of environmental protection, energy conservation and emission reduction on a global scale, how to further improve the performance of variable-frequency rotary compressors and better realize the miniaturization of compressors applied to air-conditioning systems is a common problem faced by the technological development in the industry.

[0004] At present, the ratio of the maximum refrigerating capacity to the outer diameter of the housing of the variable-frequency rotary compressor is relatively small, and the main bottleneck in miniaturization lies in the limitation of the rotational speed. In existing variable-frequency rotary compressors, due to the limitation of the maximum operating frequency, when a compressor with a greater cooling capacity is required, the compressor displacement needs to be increased. After the compressor displacement increases, due to the dual limitations of the pump body structure and the motor, the compressor housing will increase, and the volume and cost of the entire compressor will increase. Summary of the Invention

[0005] The main object of the present invention is to provide a compressor and an air conditioner having the same, so as to solve the problem of the large volume of the compressor in the prior art.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided a compressor, including: a housing; a pump body assembly disposed in the housing, the pump body assembly including a cylinder; wherein, the outer diameter of the housing is D, the total displacement of the compressor is V, and the refrigerating capacity of the compressor under the condition of the highest frequency is Q, and 8 < Q / V / D < 15.

[0007] Further, the compressor further includes: a motor disposed in the housing, the volume of the motor is V1, wherein, 30 < Q / V1 < 80.

[0008] Further, the outer diameter of the cylinder is d1, the inner diameter of the cylinder is d2, and the equivalent diameter of the cylinder of the compressor is d, d = sqrt, wherein, 13 < Q / V / d < 20.

[0009] Further, there are a plurality of cylinders, and the plurality of cylinders are independently disposed.

[0010] Further, V = 25 cc, the frequency of the compressor is f0, where 200 Hz ≤ f0 ≤ 250 Hz, and 23 KW ≤ Q ≤ 25 KW.

[0011] Further, the compressor further includes: a first rotor balance weight disposed at an end of the motor on a side away from the pump body assembly; a second rotor balance weight disposed at an end of the motor on a side close to the pump body assembly.

[0012] Further, the compressor further includes: a third rotor balance weight disposed at an end of the motor on a side close to the pump body assembly; a crankshaft, a first end of the crankshaft is connected to the motor, a second end of the crankshaft is connected to the pump body assembly, and a crankshaft balance weight is disposed at an end of the second end of the crankshaft.

[0013] Further, the bottom of the housing has an oil sump, and an oil stabilizing plate is disposed in the oil sump and is completely immersed in the oil body.

[0014] According to another aspect of the present invention, there is provided an air conditioner including a compressor, and the air conditioner is the above-mentioned compressor.

[0015] Applying the technical solution of the present invention, by setting the total displacement of the compressor, the ratio relationship between the refrigeration capacity of the compressor under the condition of the highest frequency and the inner diameter of the compressor, especially limiting the ratio relationship of the three to: 8 < Q / V / D < 15, such a setting enables the compressor to achieve a miniaturized design, that is, the compressor can achieve a large cooling capacity output with a relatively small displacement. Under the condition that the volume of the compressor remains unchanged, the capacity of the compressor is significantly improved, thereby effectively realizing the miniaturized application of the compressor in the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 Shows a schematic structural diagram of an embodiment of a compressor according to the present invention;

[0018] Figure 2 Shows a graph of the relationship between the effective load ratio of the motor and the pump body and the rotational speed;

[0019] Figure 3 Shows a graph of Q / V / D and the overall machine reliability and cost trend according to the present invention;

[0020] Figure 4 Shows a graph of Q / V1 and the motor efficiency and reliability trend according to the present invention;

[0021] Figure 5 The Q / V / d versus pump body efficiency and reliability trend diagram according to the present invention is shown.

[0022] Among them, the above-mentioned drawings include the following reference numerals:

[0023] 10. Housing;

[0024] 20. Cylinder;

[0025] 30. Motor; 31. First rotor balance weight; 32. Second rotor balance weight;

[0026] 40. Crankshaft. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners 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, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0029] 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 do not necessarily need to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the implementation manners of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0030] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0031] Combined with Figures 1 to 5 As shown, according to a specific embodiment of the present invention, a compressor is provided.

[0032] Specifically, the compressor includes a housing 10 and a pump body assembly. The pump body assembly is disposed within the housing 10, and the pump body assembly includes a cylinder 20. Wherein, the outer diameter of the housing 10 is D, the total displacement of the compressor is V, the refrigeration capacity of the compressor under the operating condition of the highest frequency is Q, and 8 < Q / V / D < 15.

[0033] In this embodiment, by setting the ratio relationship among the total displacement of the compressor, the refrigeration capacity of the compressor under the operating condition of the highest frequency, and the inner diameter of the compressor, especially by limiting the ratio relationship among the three to: 8 < Q / V / D < 15, such a setting enables the compressor to achieve a miniaturized design, that is, the compressor can achieve a large cooling capacity output with a relatively small displacement (for example: the displacement is 25 cc, and the cooling capacity output can reach 23 KW - 25 KW). Under the condition that the volume of the compressor remains unchanged, the capacity of the compressor is significantly improved, thereby effectively realizing the miniaturized application of the compressor in the air conditioning system.

[0034] The compressor further includes a motor 30. The motor 30 is disposed within the housing 10, and the volume of the motor 30 is V1, wherein, 30 < Q / V1 < 80. The compressor adopting this structure has the operating characteristics of small displacement and high speed (for example: when the displacement is 25 cc and it operates at a high speed of 200 Hz - 250 Hz, the cooling capacity output can reach 23 KW - 25 KW. In the conventional technology, the highest operating speed is below 100 Hz, and the required displacement is not less than 50 cc). Under the condition of the same refrigerating capacity (heating capacity), the load utilization rate of the pump body and the motor is greatly increased, and the reliable performance is fully guaranteed, which not only reduces the resource cost, but also has significant advantages such as light weight and convenient installation.

[0035] Furthermore, the outer diameter of the cylinder 20 is d1, the inner diameter of the cylinder 20 is d2, and the equivalent diameter of the cylinder of the compressor is d, d = sqrt(d1, d2), wherein, 13 < Q / V / d < 20. Such a setting can further improve the performance of the compressor and can effectively improve the performance of the compressor.

[0036] In this embodiment, there can be multiple cylinders 20, and the multiple cylinders 20 are independently arranged. Such an arrangement can improve the practicability and reliability of the compressor.

[0037] As Figure 1 shown, the compressor further includes a first rotor balance weight 31 and a second rotor balance weight 32. The first rotor balance weight 31 is arranged at the end of the motor 30 on the side away from the pump body assembly. The second rotor balance weight 32 is arranged at the end of the motor 30 on the side close to the pump body assembly. Such an arrangement can improve the stability of the compressor.

[0038] According to another embodiment of the present application, the compressor further includes a third rotor balance weight and a crankshaft 40. The third rotor balance weight is arranged at the end of the motor 30 on the side close to the pump body assembly. The first end of the crankshaft 40 is connected to the motor 30, the second end of the crankshaft 40 is connected to the pump body assembly, and a crankshaft balance weight is arranged at the end of the second end of the crankshaft 40. In this embodiment, the Figure 1 first rotor balance weight 31 is cancelled. Such an arrangement can reduce the installation height of the internal components of the entire compressor, and at the same time reduce the deflection of the crankshaft, reduce the wear between the crankshaft and the bearing, and improve the reliability of the compressor.

[0039] Further, in this embodiment, the bottom of the housing 10 has an oil sump, and a stabilizer plate is arranged in the oil sump, and the stabilizer plate is completely immersed in the oil body. Such an arrangement makes the oil body in the oil sump not oscillate when the crankshaft balance weight rotates, improving the stability of the compressor. Among them, oil through holes with different apertures can be arranged on the stabilizer plate, which can further reduce the oscillation effect of the oil body.

[0040] Specifically, the compressor provided by the present application is a rotary compressor, which is composed of a housing, a motor composed of a stator assembly and a rotor assembly, a pump body assembly, refrigerating oil, etc. The total displacement of the compressor is V (cm 3 ), the outer diameter of the housing of the compressor is D (mm), the highest frequency at which the compressor can operate stably and reliably under national standard working conditions is f0, and the refrigerating capacity of the compressor at the frequency f0 under national standard working conditions is Q (W). Then V, D, and Q satisfy the relationship: 8 < Q / V / D < 15. Preferably, 9.5 < Q / V / D < 12.

[0041] Further, the volume of the motor of the compressor is V1 (cm 3 ), then Q and V1 satisfy the relationship: 30 < Q / V1 < 80. Preferably, especially 40 < Q / V1 < 65. The outer diameter of the cylinder of the compressor pump body assembly is d1 (mm), the inner diameter of the cylinder is d2, and the equivalent diameter d of the cylinder of the compressor assembly is d = sqrt(d1, d2). Then 13 < Q / V / d < 20. Preferably, 16 < Q / V / d < 18.5.

[0042] The core technical point for realizing the above relationship is the increase in the rotational speed of the rotary compressor. As mentioned in the background art, in the existing variable-frequency rotary compressor, due to the limitation of the maximum operating frequency, when a compressor with a greater cooling capacity is required, it is necessary to increase the compressor displacement. Based on the above industry problems, the present application effectively solves the technical problems existing in the prior art through a substantial increase in rotational speed and various (reliability, performance, noise) guarantee technologies required for the increase in rotational speed.

[0043] The rolling rotor type compressor body is composed of a housing and a pump body assembly and a motor assembly contained therein, as Figure 1 shown. Among them, the motor assembly includes: a stator, a rotor, and a balance weight for balancing the compressor. The pump body assembly includes a cylinder with a certain compression chamber space inside, a crankshaft whose long end is fixedly connected to the motor rotor, an upper bearing and a lower bearing that can support the crankshaft, the inner surface of the roller contacts the outer peripheral surface of the eccentric part of the crankshaft, and the outer peripheral surface contacts the inner surface of the cylinder, and makes a revolution and a rotation movement through the rotation of the eccentric part of the crankshaft.

[0044] In a traditional compressor, due to the limitation of frequency, the value of capacity / displacement is very low, that is, the utilization rate of displacement is very low. When the system capacity requirement increases and a compressor with a greater cooling capacity is required, only the compressor displacement can be increased. Once the compressor displacement is increased, it will directly lead to an increase in the compressor housing, resulting in an increase in the volume and cost of the compressor and even the system.

[0045] The motor assembly realizes the output force through the magnetic energy change rate, and the motor output efficiency is jointly determined by the motor type, motor volume, design parameters, etc. Define the motor load rate = actual output power / rated power. From the definition, it can be seen that the load rate means the degree of full utilization of the motor capacity. Therefore, under the condition of being lower than the rated power, the motor load rate during the actual operation of the compressor should be increased as much as possible, which can also further improve the motor efficiency to achieve energy saving and efficiency improvement of the compressor. The design of the traditional structure motor is to improve the power density through magnetic circuit optimization and the selection of magnetic materials, but on the premise that the motor structure and application principle remain unchanged, the improvement amplitude of the power density is not large, that is, the motor load is basically determined by the motor volume.

[0046] The pump body displacement is mainly determined by the compression chamber volume. The compression chamber volume means the degree of full utilization of the pump body capacity. Therefore, under the condition that the outer diameter of the compressor is determined, the effective working volume of the pump body should be increased as much as possible. From the working principle, the biggest influencing factor for the effective working volume of the pump body is the cylinder size, and it is directly related to the outer diameter and inner diameter of the cylinder.

[0047] The high-speed rotary compressor of the present application has a relatively fixed compressor displacement. By increasing the rotational speed, the purpose of achieving a large load ratio output is achieved, that is, the capacity of the compressor is improved. The designed ratio of the refrigerating capacity to the displacement of the compressor is relatively large, realizing the design of compressor miniaturization and saving the compressor cost. From an application perspective, the rotational speed needs to be increased by a certain amount to meet the requirements of compressor miniaturization design. It should be noted that, as mentioned above, as the frequency increases, the load ratios of the compressor motor and the pump body increase. As Figure 2 shown, the reliability of the compressor will be greatly reduced. If the reliability is reduced to a certain extent, remedial measures must be taken to ensure high-speed reliable operation, which often leads to an increase in the overall machine cost and the loss of the original advantage of high-speed improvement in miniaturization.

[0048] Therefore, as Figure 2 shown, under the condition of a certain structure, the maximum operating frequency of the high-speed rotary compressor of the technical solution of the present application is restricted by both the volume of the motor and the size of the pump body cylinder. There is an optimal range between the maximum refrigerating capacity of the compressor and the volume of the motor and the size of the cylinder. Within this range, the compressor not only has good reliability, but also has relatively good advantages in the effective utilization rate and the usage cost of the compressor.

[0049] The compressor capacity mentioned in the present application is as shown in Table 1 below: It is tested under the working conditions required in GB / T 15765-2014 "Hermetic Motor-Compressors for Room Air Conditioners":

[0050] Table 1

[0051] Evaporation temperature (°) Condensation temperature (°) Suction temperature (°) Subcooling degree (°) Ambient temperature (°) 7.2±0.2 46±0.3 18.3±0.5 8.3±0.2 35±1

[0052] According to research:

[0053] Within the range of 8 < maximum refrigerating capacity of the compressor / (total displacement of the compressor * outer diameter of the housing) < 15, better design results can be obtained for the overall reliability and material cost of the compressor.

[0054] Within the range of 30 < maximum refrigerating capacity of the compressor / volume of the motor < 80, better application results can be obtained for the motor efficiency curve, motor reliability (to avoid heat dissipation and temperature rise problems), and material cost.

[0055] Within the range of 13 < maximum refrigerating capacity of the compressor / (total displacement of the compressor * equivalent diameter of the cylinder) < 20, better application results can be obtained for the reliability and material cost of the compressor pump body.

[0056] It should be noted that the present application defines a reliability coefficient. The larger the coefficient, the better the reliability and the more stable the operating state of the compressor.

[0057] 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 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 "above" 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 are made for the spatial relative descriptions used here.

[0058] In addition to the above, it should also be noted that the "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in connection with that embodiment being included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that implementing such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present invention.

[0059] In the above embodiments, the descriptions of each embodiment have their own focuses. For parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0060] 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 modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A compressor, characterized in that, comprising: a housing (10); a pump body assembly, the pump body assembly being disposed within the housing (10), the pump body assembly including a cylinder (20); wherein, the outer diameter of the housing (10) is D, the total displacement of the compressor is V, the refrigeration capacity of the compressor under the condition of the highest frequency is Q, 8 < Q / V / D < 15, the unit of Q is W, the unit of V is cm³, and the unit of D is mm.

2. The compressor according to claim 1, characterized in that, the compressor further comprises: a motor (30), the motor (30) being disposed within the housing (10), the volume of the motor (30) being V1, wherein, 30 < Q / V1 < 80, the unit of V1 is cm³.

3. The compressor according to claim 1, characterized in that, the cylinders (20) are multiple, and the multiple cylinders (20) are independently disposed.

4. The compressor according to claim 1, characterized in that, V = 25 cc, the frequency of the compressor is f0, wherein, 200 Hz ≤ f0 ≤ 250 Hz, 23 KW ≤ Q ≤ 25 KW.

5. The compressor according to claim 2, characterized in that, the compressor further comprises: a first rotor balance weight (31), the first rotor balance weight (31) being disposed at an end of the motor (30) on a side away from the pump body assembly; a second rotor balance weight (32), the second rotor balance weight (32) being disposed at an end of the motor (30) on a side close to the pump body assembly.

6. The compressor according to claim 2, characterized in that, the compressor further comprises: a third rotor balance weight, the third rotor balance weight being disposed at an end of the motor (30) on a side close to the pump body assembly; a crankshaft (40), a first end of the crankshaft (40) being connected to the motor (30), a second end of the crankshaft (40) being connected to the pump body assembly, and a crankshaft balance weight being disposed at an end of the second end of the crankshaft (40).

7. The compressor according to claim 6, characterized in that, the bottom of the housing (10) has an oil sump, and a stabilizing oil plate is disposed within the oil sump, and the stabilizing oil plate is completely immersed in the oil body.

8. An air conditioner, comprising a compressor, characterized in that, the air conditioner is the compressor according to any one of claims 1 to 7.

Images