阅读说明：本技术 电动压缩机和制冷设备 (Electric compressor and refrigeration equipment ) 是由 夏小鸽 杨开成 于 2017-01-24 设计创作，主要内容包括：本发明公开了电动压缩机和制冷设备。其中,电动压缩机的壳体为铝合金壳体,所述铝合金壳体内封装有润滑油和冷媒,所述铝合金壳体由铝合金粉末通过挤压铸造制成,所述铝合金粉末包含：0.1～12wt％的硅；0.2～2.0wt％的镁；0.2～2.0wt％的铁；0.05～1.0wt％的锌；0.01～0.5wt％的钛；0～3.0wt％的铜；0～0.5wt％的锰；0～0.5wt％的镍；0～0.5wt％的锡；以及余量的铝。该电动压缩机的壳体采用挤压铸造铝合金制成,抗压强度与屈服强度高,适用于以CO-(2)为冷媒的电动压缩机。(The invention discloses an electric compressor and a refrigeration device. The shell of the electric compressor is an aluminum alloy shell, lubricating oil and a refrigerant are packaged in the aluminum alloy shell, the aluminum alloy shell is made of aluminum alloy powder through extrusion casting, and the aluminum alloy powder comprises: 0.1 to 12 wt% of silicon; 0.2 to 2.0 wt% of magnesium; 0.2 to 2.0 wt% iron; 0.05 to 1.0 wt% of zinc; 0.01 to 0.5 wt% of titanium; 0 to 3.0 wt% of copper; 0-0.5 wt% manganese; 0-0.5 wt% nickel; 0 to 0.5 wt% tin; and the balance aluminum. The shell of the electric compressor is made of extrusion casting aluminum alloy, has high compressive strength and yield strength, and is suitable for being used as CO 2 An electric compressor for a refrigerant.)

1. The electric compressor is characterized in that a shell of the electric compressor is an aluminum alloy shell, lubricating oil and a refrigerant are packaged in the aluminum alloy shell, and the refrigerant is CO₂A coolant, the aluminum alloy case being made of aluminum alloy powder by squeeze casting, the aluminum alloy powder containing:

0.1 to 0.25 wt% of silicon;

1.3 to 1.8 wt% of magnesium;

0.9 to 1.3 wt% iron;

0.05 to 1.0 wt% of zinc;

0.04 to 0.1 wt% of titanium;

1.9-2.7 wt% copper; and

the balance being aluminum.

2. The motor-driven compressor according to claim 1, wherein the lubricating oil has a viscosity of 40 to 100mm²/s。

3. The motor-driven compressor according to claim 2, wherein the lubricating oil is a hydrocarbon oil and/or an oxygen-containing synthetic oil.

4. The motor-driven compressor according to claim 2, wherein the lubricant is at least one selected from the group consisting of POE, PVE, and PAG.

5. The motor-driven compressor according to claim 1, wherein the aluminum alloy shell has a thickness of 4 to 10 mm.

6. A refrigerating apparatus comprising the motor-driven compressor according to any one of claims 1 to 5.

Technical Field

The invention relates to the technical field of electric compressors, in particular to an electric compressor and refrigeration equipment.

Background

The electric automobile is an ideal choice for new energy automobiles due to energy conservation and environmental protection, and the electric automobile has many internal devices, large self weight and small space for arrangement, so that the miniaturization and light weight of the electric compressor are important problems to be solved. At present, the electric compressor mostly adopts aluminum as a sealing shell, a refrigerating working medium adopts R134a refrigerant, and the aluminum shell can meet the sealing requirement by adopting general casting due to the lower working pressure of the R134a refrigerant. The R134a refrigerant is a hydrofluorocarbon, has a destruction coefficient to the ozone layer of 0, but has a high potential for climate warming, and is not specified in the montreal protocol, but is characterized as a greenhouse gas in the kyoto protocol of the united nations climate change framework convention, and the european union prohibits the use of a refrigerant related to a Hydrofluorocarbon (HFCS) having a high GWP value, and therefore, the use of a refrigerant having a low GWP value for an automobile air conditioner is a trend and necessity.

The carbon dioxide refrigerant is a natural working medium, ODP (optical density distribution) is 0, GWP (global warming potential) is 1, the source is wide, the cost is low, the latent heat of evaporation is large, the refrigerating capacity per unit volume is quite high, but the working pressure of the carbon dioxide refrigerant compressor is up to 15MPa, the compressor is 5-10 times that of a conventional refrigerant, the requirements on the compression resistance and the yield capacity of a sealed shell are extremely high, and the conventional aluminum alloy is cast by adopting general pressure and has low density and can not meet the requirement on high pressure. If the thickness of the shell of the hot-rolled steel plate carbon dioxide compressor is increased to 6-10 mm, the weight of the whole compressor is increased, and the requirement for light weight of the automobile air-conditioning compressor cannot be met, so that the satisfaction degree of users is reduced.

Thus, existing motor compressor housings remain to be improved.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to propose an electric compressor and a refrigeration device. The shell of the electric compressor is made of extrusion casting aluminum alloy, has high compressive strength and yield strength, and is suitable for being used as CO₂An electric compressor for a refrigerant.

In a first aspect of the present invention, a motor-driven compressor is presented. According to an embodiment of the present invention, the housing of the electric compressor is an aluminum alloy housing, and lubricating oil and a coolant are enclosed in the aluminum alloy housing, and the aluminum alloy housing is made of aluminum alloy powder by extrusion casting, the aluminum alloy powder including: 0.1 to 12 wt% of silicon; 0.2 to 2.0 wt% of magnesium; 0.2 to 2.0 wt% iron; 0.05 to 1.0 wt% of zinc; 0.01 to 0.5 wt% of titanium; 0 to 3.0 wt% of copper; 0-0.5 wt% manganese; 0-0.5 wt% nickel; 0 to 0.5 wt% tin; and the balance aluminum.

Therefore, according to the embodiment of the invention, the shell of the motor compressor is made of extrusion casting aluminum alloy, has high compressive strength and yield strength, and is suitable for being used in CO₂An electric compressor for a refrigerant.

In addition, the motor-driven compressor according to the above embodiment of the present invention may further have the following additional technical features:

in some embodiments of the invention, the aluminum alloy powder comprises: 0.1 to 12 wt% of silicon; 0.2 to 2.0 wt% of magnesium; 0.2 to 2.0 wt% iron; 0.05 to 1.0 wt% of zinc; 0.01 to 0.5 wt% of titanium; 0.1 to 3.0 wt% of copper; 0.1 to 0.5 wt% manganese; 0.05 to 0.5 wt% of nickel; 0.05 to 0.5 wt% of tin; and the balance aluminum.

In some embodiments of the present invention, the thickness of the aluminum alloy shell is 4 to 10 mm.

In some embodiments of the invention, the aluminum alloy housing has a tensile strength of not less than 290MPa and a yield strength of not less than 220 MPa.

In some embodiments of the present invention, the viscosity of the lubricating oil is 40 to 100mm²/s。

In some embodiments of the invention, the lubricating oil is a hydrocarbon oil and/or an oxygenated synthetic oil.

In some embodiments of the invention, the lubricant is at least one selected from POE, PVE, and PAG.

In some embodiments of the invention, the refrigerant is CO₂And (4) a refrigerant.

In a second aspect of the invention, a refrigeration apparatus is presented. According to an embodiment of the present invention, the refrigeration apparatus comprises the above-described motor-driven compressor. The refrigeration device thus has a low mass, so that the requirements of the customer are met.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a sectional view of a motor-driven compressor according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In a first aspect of the present invention, a motor-driven compressor is presented. According to an embodiment of the present invention, referring to fig. 1, the housing of the electric compressor is an aluminum alloy housing 100, in which lubricating oil and coolant are enclosed, and the aluminum alloy housing may be made of aluminum alloy powder by extrusion casting, and the aluminum alloy powder may include: 0.1 to 12 wt% of silicon; 0.2 to 2.0 wt% of magnesium; 0.2 to 2.0 wt% iron; 0.05 to 1.0 wt% of zinc; 0.01 to 0.5 wt% of titanium; 0 to 3.0 wt% of copper; 0-0.5 wt% manganese; 0-0.5 wt% nickel; 0 to 0.5 wt% tin; and the balance aluminum.

The electric compression aluminum alloy shell prepared by adopting the aluminum alloy powder components and the proportion through the extrusion casting process can firstly meet the requirement of light weight, and meanwhile, the tensile strength of the aluminum alloy shell is not lower than 290MPa, the yield strength of the aluminum alloy shell is not lower than 220MPa, and further the performance requirement of the electric compressor shell can be completely met. In addition, the aluminum alloy shell can also be suitable for use with CO₂The aluminum alloy shell meets the requirement of 17MPa of design pressure, and the highest pressure resistance reaches 34 MPa. The requirement of 14MPa of design pressure can be met at the working temperature of 170 ℃. Therefore, the motor-driven compressor of the embodiment of the invention can further improve the light weight level and stability by adopting the aluminum alloy powder composition and the aluminum alloy shell obtained by proportioning extrusion casting.

According to an embodiment of the present invention, the aluminum alloy powder may include: 0.1 to 12 wt% of silicon; 0.2 to 2.0 wt% of magnesium; 0.2 to 2.0 wt% iron; 0.05 to 1.0 wt% of zinc; 0.01 to 0.5 wt% of titanium; 0.1 to 3.0 wt% of copper; 0.1 to 0.5 wt% manganese; 0.05 to 0.5 wt% of nickel; 0.05 to 0.5 wt% of tin; and the balance aluminum. Therefore, the compressive strength and the yield strength of the prepared aluminum alloy shell can be further improved. Specifically, the tensile strength and yield strength of the aluminum alloy shell can be further improved by preferably selecting the above aluminum alloy powder components and proportions.

According to the embodiment of the invention, the thickness of the aluminum alloy shell can be 4-10 mm. Therefore, the weight of the aluminum alloy shell can be obviously reduced while the mechanical property of the aluminum alloy shell is ensured.

According to the motor-driven compressor of the above embodiment of the present invention, the aluminum alloy shell has a tensile strength of not less than 290MPa and a yield strength of not less than 220 MPa. Thereby, the reliability of the electric compressor can be further improved.

According to the electric compressor of the embodiment of the invention, the lubricant oil encapsulated in the aluminum alloy shell is not particularly limited, so that the applicability of the electric compressor can be further improved, for example, the viscosity of the encapsulated lubricant oil can be 40-100 mm²And s. This can significantly improve the cooling effect of the electric compressor.

According to an embodiment of the present invention, the lubricating oil may be a hydrocarbon oil and/or an oxygen-containing synthetic oil. This can further improve the cooling effect of the electric compressor. According to an embodiment of the present invention, the lubricant may be at least one selected from POE, PVE, and PAG. This can further improve the cooling effect of the electric compressor. Therefore, the electric compressor provided by the embodiment of the invention adopts the aluminum alloy shell, so that the selection range of the lubricating oil can be remarkably improved, and the applicability of the electric compressor is further improved.

According to an embodiment of the present invention, the cooling medium enclosed in the aluminum alloy housing is not particularly limited. The aluminum alloy shell can meet the requirement of 17MPa of design pressure, and the highest pressure resistance can reach 34 MPa. Even at the working temperature of 170 ℃, the requirement of 14MPa of design pressure can be met. Therefore, the electric compressor of the embodiment of the present invention can satisfy the use of CO₂The pressure requirement of the refrigerant. Specifically, the refrigerant encapsulated in the electric compressor according to the embodiment of the present invention may be CO₂And (4) a refrigerant. This can further improve the application range and the cooling effect of the electric compressor.

According to the embodiment of the invention, the aluminum alloy shell for electric compression, which is prepared by adopting the components and the proportion of the aluminum alloy powder and adopting the extrusion casting process, can firstly meet the requirement of light weight, and meanwhile, the tensile strength of the aluminum alloy shell is not lower than 290MPa, the yield strength of the aluminum alloy shell is not lower than 220MPa, and further, the performance requirement of the shell of the electric compressor can be completely met. In addition, the aluminum alloy shell can also be suitable for use with CO₂The aluminum alloy shell meets the requirement of 17MPa of design pressure, and the highest pressure resistance reaches 34 MPa. The requirement of 14MPa of design pressure can be met at the working temperature of 170 ℃. Thus, it is possible to provideThe electric compressor of the embodiment of the invention adopts the aluminum alloy shell obtained by extrusion casting by adopting the aluminum alloy powder composition and proportioning, and can further improve the light weight level and stability.

In a second aspect of the invention, a refrigeration apparatus is presented. According to an embodiment of the present invention, the refrigeration apparatus includes the motor-driven compressor according to the above-described embodiment of the present invention. The electric compressor of the embodiment of the invention has the aluminum alloy shell, so the electric compressor is lighter, has higher pressure resistance, and meets the requirement of CO₂And (5) the use requirement of the refrigerant. Therefore, the refrigeration equipment with the electric compressor in the embodiment of the invention can not only meet the requirement of light weight, but also further improve the reliability of the refrigeration equipment, thereby meeting the requirements of customers.

The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.

Example 1

The aluminum alloy powder comprises: 11.38 wt% silicon, 0.2 wt% magnesium, 0.17 wt% manganese, 0.83 wt% iron, 0.95 wt% zinc, 0.01 wt% titanium, 0.05 wt% nickel and the balance aluminum.

The aluminum alloy powder is adopted to squeeze and cast an aluminum alloy shell, and the mechanical properties of the material are tested, wherein the tensile strength is 350MPa, and the yield strength is 250 MPa.

Example 2

The aluminum alloy powder comprises: 8.6-9.4 wt% of silicon, 0.45-0.6 wt% of magnesium, 0.1 wt% of manganese, 0.2 wt% of iron, 0.1 wt% of zinc, 0.2 wt% of titanium, 1.6-2.0 wt% of copper and the balance of aluminum.

The aluminum alloy powder is adopted to squeeze and cast the aluminum alloy shell, and the mechanical properties of the material are tested, wherein the tensile strength is 350MPa, and the yield strength is 240 MPa.

Example 3

The aluminum alloy powder comprises: 6.5 to 7.5 wt% of silicon, 0.3 to 0.45 wt% of magnesium, 0.05 wt% of manganese, 0.23 to 0.5 wt% of iron, 0.05 wt% of zinc, 0.2 wt% of titanium, 0.1 wt% of copper, 0 to 0.5 wt% of nickel, 0 to 0.5 wt% of tin and the balance of aluminum.

The aluminum alloy powder is adopted to squeeze and cast the aluminum alloy shell, and the mechanical properties of the material are tested, wherein the tensile strength is 310MPa, and the yield strength is 240 MPa.

Example 4

The aluminum alloy powder comprises: 0.1 to 0.25 wt% of silicon, 1.3 to 1.8 wt% of magnesium, 0.9 to 1.3 wt% of iron, 0.1 wt% of zinc, 0.04 to 0.1 wt% of titanium, 1.9 to 2.7 wt% of copper and the balance of aluminum.

The aluminum alloy powder is adopted to squeeze and cast the aluminum alloy shell, and the mechanical properties of the material are tested, wherein the tensile strength is 380MPa, and the yield strength is 285 MPa.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.