JP2018131969A - Slide member in refrigerant compressor and refrigerant compressor with the member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding member of a refrigerant compressor reciprocating in a refrigerant atmosphere, which is resistant to wear and has excellent durability even in a region where the sliding speed is slow. SOLUTION: As a sliding member (4) incorporated in a refrigerant compressor such as an Oldham link, a film (11) having a Vickers hardness of 500 or more is formed on the surface of a main body (10) made of a light metal or an alloy thereof. Adopt things. [Selection diagram] Fig. 3

Description

  The present invention relates to a sliding member of a refrigerant compressor that reciprocates in a refrigerant atmosphere in the field of air conditioners.

  In refrigerants used in air conditioners, the use of CFC or HCFC refrigerants as ozone depleting substances is prohibited, and instead, HFC (hydrofluorocarbon) refrigerants that do not contain such destructive substances are transferred. It has been a long time. Since this HFC refrigerant is premised on use under a higher pressure than previously used CFC or HCFC refrigerant, it is known that the pressure load is high in the compressor of the air conditioner using this HFC refrigerant. It is known that the members constituting the internal compression mechanism are required to have higher wear resistance than the conventional one (see Patent Document 1).

  For example, in a scroll-type refrigerant compressor of an air conditioner, an Oldham link is used as a member that combines a fixed scroll with a orbiting scroll and supports the orbiting scroll with respect to the fixed scroll fixed to the casing of the air conditioner. There is a member called. The Oldham link is supported so as to be able to reciprocate in a certain radial direction in the orbiting surface with respect to the base holding the orbiting scroll, and orbits with respect to itself in another direction perpendicular to the certain radial direction in the orbiting surface. The scroll is supported so that it can reciprocate. Thus, the orbiting scroll is allowed to revolve only while being prevented from rotating with respect to the fixed scroll. In other words, the Oldham link is a sliding member that reciprocates in a radial direction in the orbiting plane with respect to the casing fixed to the fixed scroll and in another direction orthogonal to the certain radial direction with respect to the orbiting scroll. is there.

  Conventionally, the Oldham link, which is such a sliding component, reciprocates, and thus tends to generate vibration compared to a member that rotates. Therefore, in order to reduce the force of inertia that causes vibration, for example, a casting mainly made of a light metal alloy such as an aluminum alloy is used, and a wear-resistant film is formed on the surface by anodizing or tinning. Is formed.

JP 2001-099066 A

  In general, it is said that the sliding condition of a sliding member in a refrigerant compressor is severer as the sliding speed is lower. However, unlike a member that reciprocates, a reciprocating member has zero speed at both ends of the moving region. Since the speed is slow at that point and before and after that point, the oil slip condition becomes stricter than other members that rotate at a substantially constant speed.

  The present invention has been made in view of the above circumstances, and in a sliding member of a refrigerant compressor that reciprocates in a refrigerant atmosphere, a sliding member that is resistant to wear and excellent in durability even in a region where the sliding speed is slow. It is intended to provide.

  The sliding member of the refrigerant compressor according to the present invention includes a main body made of a light metal or an alloy thereof, and a first film having wear resistance formed on the surface of the main body, and the hardness of the first film is It is characterized by being HV500 or more.

  In the sliding member of the refrigerant compressor according to the present invention, the main body may be made of an aluminum alloy, and the first film may be a ceramic film formed on the surface of the main body.

  In the sliding member of the refrigerant compressor according to the present invention, the thickness of the first film may be 20 microns or less.

  The sliding member of the refrigerant compressor according to the present invention may further include a self-lubricating second film formed on the surface of the first film on the main body.

  The refrigerant compressor according to the present invention includes the sliding member and a support member that supports the sliding member so as to be capable of reciprocating. Specifically, the fixed scroll, the orbiting scroll combined with the fixed scroll, and an Oldham link that supports the orbiting scroll so as to be able to revolve with respect to the fixed scroll, the Oldham link is a light metal or its It may be a scroll type refrigerant compressor which is a sliding member having a main body made of an alloy and a first film having a Vickers hardness of 500 or more formed on the surface of the main body.

  The refrigerant compressor according to the present invention includes a cylindrical housing, a rotor that rotates inside the housing, and a spring that is supported by the rotor so as to be capable of reciprocating in the radial direction of the rotor and that is disposed inside the rotor. A pair of vanes pressed against the inner surface of the housing, the pair of vanes having a main body made of a light metal or an alloy thereof, and a first film having a Vickers hardness of 500 or more formed on the surface of the main body. It may be a rotary type refrigerant compressor which is a sliding member.

  A refrigerant compressor according to the present invention includes a cylinder, a piston disposed so as to be in contact with the inner surface of the cylinder, and a piston rod connected to the piston and reciprocatingly moving the piston in a length direction of the cylinder inside the cylinder. The piston is a reciprocating type refrigerant compressor that is a sliding member having a main body made of a light metal or an alloy thereof and a first coating having a Vickers hardness of 500 or more formed on the surface of the main body. May be.

An air conditioning system according to the present invention includes a refrigerant compressor that compresses a refrigerant gas, a condenser that condenses / liquefies the refrigerant gas compressed by the compressor and dissipates heat, and adiabatic expansion of the liquid refrigerant that has passed through the condenser to reduce the pressure. And an evaporator that evaporates / vaporizes the liquid refrigerant that has passed through the expansion valve and absorbs heat, and each element of the refrigerant compressor, condenser, expansion valve, and evaporator passes through a pipe that circulates and conveys the refrigerant. An air conditioning system connected and air-conditioned by heat transfer between the condenser and the evaporator using the refrigerant as a heat transfer medium,
The sliding member of the refrigerant compressor includes a main body made of light metal or an alloy thereof, and a first film having wear resistance formed on the surface of the main body, and the hardness of the first film is HV500 or more. It is characterized by being.

  According to the present invention, since the member having the above characteristics is adopted as the sliding member inside the refrigerant compressor, even in the region where the sliding speed peculiar to the reciprocating member is slow, the member is not easily worn and durable. Improves. This improvement in wear resistance is due to the soundness of the compressor even when the refrigerant compressor is operated under extremely severe oil-sliding conditions, or due to design constraints, low-viscosity refrigeration oil must be employed. Can be maintained over a long period of time, and thereby the life of the air conditioning system including the refrigerant compressor can be extended.

It is a disassembled perspective view which shows the fixed scroll, the turning scroll, and Oldham link which are the main components of the scroll-type refrigerant compressor which concerns on this invention. It is a block diagram showing an air-conditioning system including a scroll type refrigerant compressor concerning the present invention. It is a fragmentary sectional view showing an example of the surface structure of an Oldham link as a sliding member concerning the present invention. It is a schematic sectional drawing which shows the main structures of the rotary type refrigerant compressor which concerns on this invention. It is a schematic sectional drawing which shows the main structures of the reciprocating type refrigerant compressor which concerns on this invention. It is a fragmentary sectional view which shows the other example of the surface structure of the Oldham link as a sliding member which concerns on this invention, Comprising: The shape of the surface in the unused state at the time of Oldham link manufacture is shown. It is a fragmentary sectional view which shows the other example of the surface structure of an Oldham link similarly to FIG. 6, Comprising: The state where the shape of the surface changed through the operation of a compressor is shown.

(First embodiment)
A scroll type refrigerant compressor as a first embodiment of a refrigerant compressor including a sliding member according to the present invention will be described below.
As shown in FIG. 1, the scroll type refrigerant compressor 1 includes a fixed scroll 2, a turning scroll 3, an Oldham link (sliding member) 4, and a base 5. The fixed scroll 2 has an end plate 2a and a spiral projection 2b formed on one surface thereof. The orbiting scroll 3 has an end plate 3a and a spiral projection 3b formed on one surface thereof. The spiral protrusion 3 b of the orbiting scroll 3 has substantially the same shape as the spiral protrusion 2 b of the fixed scroll 2.

  The Oldham link 4 includes an annular portion 4a arranged to be rotatable around the spiral projections 2b and 3b, a pair of engaging projections 4b and 4b formed on one surface of the annular portion 4a, and an annular portion 4a. It has a pair of engaging protrusions 4c and 4c formed on the other surface. The engaging protrusions 4b and 4b are formed at positions spaced from each other in the diameter direction of the annular portion 4a on one surface of the annular portion 4a. On the other hand, the engagement protrusions 4c and 4c are formed on the other surface of the annular portion 4a at positions spaced from each other in the diameter direction, which is 90 ° different from the engagement protrusions 4b and 4b.

  In the Oldham link 4, the engaging protrusions 4b and 4b are fitted into guide grooves 2c and 2c formed on one surface of the fixed scroll 2. The guide grooves 2c and 2c are formed at positions spaced from each other in the diameter direction of the end plate 2a with the spiral protrusion 2b interposed therebetween. The Oldham link 4 is connected to the guide scroll 2c, The fixed scroll 2 is supported so as to reciprocate along the diameter direction of the fixed scroll 2. Further, the Oldham link 4 is fitted with guide protrusions 4 c and 4 c in guide grooves 5 a and 5 a formed on one surface of the base 5 on the orbiting scroll 3 side. The guide grooves 5a and 5a are formed at positions spaced apart from each other in the diameter direction of the base 5 with the spiral protrusion 3b interposed therebetween. The Oldham link 4 is a guide for the base 5 on the orbiting scroll 3 side. The revolving scroll 3 is supported so as to reciprocate along the grooves 5a and 5a in the diameter direction. However, the reciprocating direction of the Oldham link 4 with respect to the orbiting scroll 3 is 90 ° different from the reciprocating direction of the Oldham link 4 with respect to the fixed scroll 2. As a result, the orbiting scroll 3 is allowed to revolve only while being prevented from rotating with respect to the fixed scroll 2.

  When the orbiting scroll 9 is revolving orbiting while being prevented from rotating, the spiral projections 2b and 3b of both scrolls engage with each other, and a plurality of arc-shaped compression cells are defined between the wall surfaces of both. The compression cell moves while reducing the volume toward the center of the vortex by the orbiting motion of the orbiting scroll 3. The scroll-type refrigerant compressor 1 adiabatically compresses the refrigerant introduced into the compression cell by utilizing a decrease in volume accompanying the orbiting motion of the orbiting scroll 3.

  The air conditioning system including the scroll-type refrigerant compressor 1 includes a capacitor 12, an expansion valve 13, and an evaporator 14, for example, as shown in FIG. 2, and each element is connected via a pipe 15 that circulates and conveys the refrigerant. Has been. In the system, the condenser 12 condenses / liquefies the high-temperature / high-pressure refrigerant gas to dissipate heat, the expansion valve 13 adiabatically expands and decompresses the high-temperature / high-pressure liquid refrigerant passed through the condenser 12, and the evaporator 14 expands. The low-temperature and low-pressure liquid refrigerant that has passed through the valve 13 is evaporated / vaporized to absorb heat, and the refrigerant compressor 1 adiabatically compresses the low-temperature and low-pressure refrigerant gas that has passed through the evaporator 14. The high-temperature and high-pressure refrigerant gas that has passed through the refrigerant compressor 1 is supplied to the capacitor 12. By circulating the refrigerant as the heat transfer medium in the closed system in this way, heat transfer from the evaporator 14 to the condenser 12 is realized, and indoor air conditioning (heating and cooling) is enabled.

  The lubricant of the scroll compressor is returned to the compressor through a refrigeration air conditioning system including an evaporator, an expansion valve, and a condenser while being mixed with the refrigerant. Lubricating oil for the refrigeration air conditioning system is used without being replaced during the period in which the air conditioning system is used in a state of being sealed in the system together with the refrigerant.

As shown in FIG. 3, the Oldham link 4 of the present embodiment includes a main body 10 made of a light metal such as aluminum, magnesium, titanium, or an alloy thereof, and a ceramic film having wear resistance formed on the surface of the main body 10 ( First film) 11. The main body 10 is, for example, an aluminum alloy casting, and relatively rough unevenness is generated on the surface thereof. However, the unevenness of the surface of the main body 10 is suppressed by forming the ceramic film 11 on the surface.
Here, the hardness of the ceramic film 11 is preferably HV (Vickers Hardness) 500 or more, and more preferably 700 or more. If the hardness of the ceramic film 11 is smaller than HV500, the difference in hardness from the other member that rubs is small, and therefore, the wear of the ceramic film 11 may proceed under severe lubrication conditions. However, if it is HV500 or more, there is a sufficient difference in hardness from the counterpart member, so that it is possible to suppress wear of the ceramic coating 11 even under severe conditions of lubrication.
The ceramic film 11 is preferably formed to a thickness of 20 microns or less. If the thickness of the ceramic film 11 is larger than 20 microns, the surface roughness after the film forming process becomes high (the surface becomes rough), and when the compressor is operated by assembling the parts as they are, the sliding surface becomes rough. Therefore, the wear of the mating member progresses. In order to prevent such progress of wear, it is necessary to additionally polish the surface to make the surface roughness below a specified value. In addition, in order to increase the film thickness, it is necessary to lengthen the time required for the film formation process, which increases the cost of the film formation process. Further, there is a problem that the film is easily peeled off.

  For the formation of the ceramic coating 11, it is preferable to employ, for example, the electrolytic ceramic coating method disclosed in Japanese Patent No. 5345115. In this method, a light metal such as aluminum, magnesium, titanium, or an alloy thereof is used as an anode in an electrolytic solution, and anodization treatment is performed on the surface thereof. At that time, by applying a high voltage exceeding several hundred volts. A hard ceramic film is formed on the surface of a light metal or an alloy thereof as an object to be processed with plasma emission.

  Generally, the sliding member in the refrigerant compressor is said to have severer oil sliding conditions as the sliding speed is lower. This is no exception even in a scroll type refrigerant compressor. The Oldham link 4 is supported by the fixed scroll 2 so as to be able to reciprocate in a certain radial direction within the orbiting surface of the orbiting scroll 3 (that is, the direction connecting the two protrusions 4b and 4b). The orbiting scroll 3 is supported so as to be able to reciprocate in a direction orthogonal to a certain radial direction (that is, a direction connecting the two protrusions 4c and 4c). Thereby, only the revolution is permitted while the orbiting scroll 3 is prevented from rotating with respect to the fixed scroll 2.

  The Oldham link 4 reciprocates in two directions orthogonal to each other in the orbiting surface, unlike a member that rotates, such as a shaft that drives the orbiting scroll 3, and the speed becomes zero at both ends of the reciprocating region. There is a point (so-called “dead point”). Before and after that point, the speed when the Oldham link 4 slides with respect to the base 5 is extremely slow, and the speed when the Oldham link 4 slides with respect to the orbiting scroll 3 is also extremely low. Become slow. In such a low speed region, the oil sliding condition of the sliding portion becomes stricter than that of a member that rotates at a substantially constant speed.

In the above air conditioning system, the refrigerant used as the heat transfer medium is an HFC refrigerant such as R410A, R134A, R407C, and R32 (in the future, use of a CO ₂ refrigerant, an HFO refrigerant, etc. is also being considered). . Moreover, the lubricating oil used according to these refrigerant | coolants is refrigerating machine oil compatible with a refrigerant | coolant like POE, PVE, PAG etc., for example.

The oil slip of the Oldham link 4 is generally considered to depend on a change in the operating state of the scroll type refrigerant compressor. For example, a scroll type refrigerant compressor may fall into the following state during normal operation.
(1) Revolving speed of the orbiting scroll: 20 rotations / second or less (2) Refrigerant temperature near the sliding portion: 50 ° C. or more First, the revolving speed of the orbiting scroll decreases and approaches the state (1). And the reciprocating motion of the Oldham link 4 in two directions also decreases in speed. Further, the temperature of the refrigerant flowing in and around the sliding portion between the Oldham link 4 and the base 5 and the sliding portion between the Oldham link 4 and the orbiting scroll 3 and the vicinity thereof increases (2). As the state approaches, the viscosity of the refrigerating machine oil that exists with the refrigerant decreases. Even if the sliding state of the Oldham link 4 becomes severe due to the decrease in the sliding speed of the Oldham link 4 and the decrease in the viscosity of the refrigerating machine oil, the ceramic film 11 is formed on the surface of the Oldham link 4. In the scroll-type refrigerant compressor that is formed and has a low coefficient of friction, the surface of the Oldham link 4 is not easily worn and the durability is improved. Thereby, the soundness of the compressor can be maintained over a long period of time, and the life of the air conditioning system including the refrigerant compressor can be extended.

It is considered that the oil slip of the Oldham link 4 also depends on changes in the properties of the refrigerant and the refrigerating machine oil. For example, refrigerants that exhibit the following properties are generally used as a refrigerant as a heat transfer medium that goes around the air conditioning system and a refrigerator oil as a lubricating oil for a compressor.
(A) Solubility of refrigerant in refrigerating machine oil: 40% or more (b) Viscosity grade of refrigerating machine oil: VG100 or less, preferably VG68 or less. Here, the viscosity grade is an index of how much viscosity is exhibited when the temperature of the refrigerating machine oil is 40 ° C.

  First, when a refrigerant | coolant melt | dissolves in refrigeration oil, the viscosity of the refrigeration oil which exists with a refrigerant | coolant will fall. Moreover, in order to smooth the conveyance of the refrigerant by the refrigerant compressor and reduce the energy consumed in the refrigerant compressor to save the energy of the air conditioning system, a refrigerant oil having a low viscosity grade tends to be used. In particular, the R32 refrigerant not only has a lower viscosity grade, but also has a higher temperature drop than other refrigerants under the conditions of use in the air conditioning system, so that the viscosity drop is more remarkable than others. Even if the state of the oil slip of the sliding part including the Oldham link 4 becomes severe due to the decrease in the viscosity of the refrigerator oil due to the dissolution of the refrigerant in the refrigerator oil and the use of the low viscosity refrigerator oil, the Oldham link In the scroll type refrigerant compressor in which the ceramic film 11 is formed on the surface 4 and the friction coefficient is kept low, the surface of the Oldham link 4 is not easily worn and the durability is improved. Thereby, the soundness of the compressor can be maintained over a long period of time, and the life of the air conditioning system including the refrigerant compressor can be extended.

  In addition, since HFC refrigerants that are widely used at present are premised on use under a higher pressure than CFC or HCFC refrigerants that have been used before, in order to ensure the liquid tightness of the compression cell in the machine The surface pressure between the two scrolls is set higher than that of a conventional compressor using a CFC or HCFC refrigerant. Thus, even when the surface pressure between the two scrolls is set high, the ceramic film 11 is formed on the surface of the Oldham link 4, and the above-mentioned scroll type refrigerant compressor in which the friction coefficient is kept low is as follows. The surface of the Oldham link 4 is hard to wear and durability is improved. Thereby, the soundness of the compressor can be maintained over a long period of time, and the life of the air conditioning system including the refrigerant compressor can be extended.

By the way, in this embodiment, although the ceramic membrane | film | coat was employ | adopted as a 1st membrane | film | coat which has abrasion resistance, DLC (diamond-like carbon) is mentioned as a material assumed to be used as a 1st membrane | film | coat other than that. Even if a DLC film is formed on the surface of the Oldham link instead of the ceramic film, the same effect as described above can be obtained.
In the present embodiment, the invention has been described using the Oldham link 4 as a sliding member. However, at least the Oldham link member, that is, the fixed scroll 2 or the orbiting scroll 3, which supports the Oldham link 4, is used as the sliding member of the present invention. A hard film such as a ceramic film may be formed as the first film on the portion in contact with the link 4.

In the present embodiment, the scroll type refrigerant compressor has been described as an example of the refrigerant compressor including the sliding member. However, the sliding member of the present invention is not limited to the scroll type, but the rotary type and the reciprocating type refrigerant compression. It can also be used in machines.
A rotary type refrigerant compressor 30 shown in FIG. 4 is supported by a cylindrical housing 31, a rotor 32 rotating inside the housing 31, and supported by the rotor 32 so as to reciprocate in the radial direction of the rotor. A pair of vanes 34 and 34 are provided to be pressed against the inner surface of the housing 31 by a spring 33 arranged. In the rotary compressor 30, the rotor 32 is rotated with respect to the housing 31, slides along the inner surface of the housing 31, the outer surface of the rotor 32, and the groove of the rotor 32, and is pressed against the inner surface of the housing 31. The compressed cell C is defined between the vanes 34 and 34, the refrigerant in the cell is compressed in the process of increasing the volume of the cell, and the compressed in the cell in the process of decreasing the volume of the compressed cell C. Discharge the refrigerant. By adopting the sliding member of the present invention in the pair of vanes 34 and 34 (or the inner surface of the groove on the rotor side accommodating the vane), the sliding between the rotor 32 and the vane 34 is made smooth and the soundness of the compressor is achieved. Can be maintained over a long period of time.

  A reciprocating refrigerant compressor 40 shown in FIG. 5 includes a cylinder 41, a piston 42 disposed so as to contact the inner surface of the cylinder 41, and the piston 42 connected to the piston 42 in the cylinder 41 in the length direction of the cylinder. And a piston rod 43 that reciprocates. In the reciprocating compressor 40, the piston 42 is reciprocated inside the cylinder 41, the refrigerant is sucked into the cylinder 41 in the process of pulling the piston 42 out of the cylinder 41, and the refrigerant is compressed in the process of pushing the piston 42 into the cylinder 41. Then, the compressed refrigerant is discharged from the cylinder 41. By employing the sliding member of the present invention for the piston 42 (or the inner surface of the cylinder 41), the sliding between the inner surface of the cylinder and the piston can be made smooth and the soundness of the compressor can be maintained over a long period of time.

(Second embodiment)
Next, a second embodiment of the sliding member according to the present invention will be described below.
As shown in FIG. 6, the Oldham link 20 of the present embodiment includes a main body 10 made of a light alloy such as aluminum, titanium, and magnesium, a ceramic film 11 formed on the surface of the main body 10, and a surface of the ceramic film 11. A self-lubricating fluororesin film (second film) 21 formed in an overlapping manner. Here, Teflon (registered trademark) is used as the fluororesin constituting the film 21.

  Before the scroll type refrigerant compressor is assembled, the surface of the Oldham link 20 on which the fluororesin film 21 is formed so as to overlap the surface of the ceramic film 11 reflects the surface shape of the ceramic film 11 almost as it is, and has some unevenness. Although the fluororesin film 21 has excellent self-lubricating properties and is softer than the ceramic film 11, the scroll-type refrigerant compressor is operated as shown in FIG. The mounted fluororesin film 21 is gradually scraped, and finally the fluororesin film 21 remains only in the concave portion of the ceramic film 11, so that the surface of the Oldham link 20 becomes smooth without unevenness.

  When the Oldham link 4 in which only the ceramic film 11 is formed on the surface of the main body 10 is used, when the refrigerant compressor is operated for a long time under extremely severe oil sliding conditions, the convex part of the ceramic film is rubbed against the other member and chipped. Therefore, there is a possibility that this piece is included in the refrigerant. If such a piece travels in the air conditioning system together with the refrigerant and is reintroduced into the refrigerant compressor, it may be sandwiched between the sliding members and cause damage or loss of oil lubricity.

  In the present embodiment, as shown in FIG. 7, the fluororesin film 21 remains only in the concave portion of the ceramic film 11, and the surface of the Oldham link 20 becomes smooth without unevenness. Even if it is operated for a long time under harsh oil lubrication conditions, the ceramic film fragments are unlikely to form. Therefore, the oil lubricity is not impaired by the pieces of the ceramic film.

  By the way, in this embodiment, although the fluororesin film | membrane was employ | adopted as a 2nd film | membrane which has a self-lubricating property, a molybdenum disulfide film | membrane is mentioned as a material mainly used as a film | membrane. Even if the molybdenum disulfide film is formed on the ceramic film 11 in place of the fluororesin film, the same effect as described above can be obtained. In addition, graphite-based (carbon-based composite materials), boron nitride, and tungsten disulfide-based materials can be used as the second film.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to said embodiment. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit of the present invention. The present invention is not limited by the above description, and is limited only by the matters described in the claims.

The present invention includes a main body made of a light metal or an alloy thereof, and a wear-resistant first film formed on the surface of the main body, and the hardness of the first film is HV500 or more. The present invention relates to a moving member and a refrigerant compressor including the sliding member.
If this sliding member is used in a refrigerant compressor, even if the refrigerant compressor is operated in a very severe oil-sliding state or a low-viscosity refrigeration oil must be used due to design constraints, the sliding member will not be slid. The surface of the moving member is less likely to be worn and durability can be improved.

DESCRIPTION OF SYMBOLS 1 Scroll type refrigerant compressor 2 Fixed scroll 3 Orbiting scroll 4, 20 Oldham link (sliding member)
10 Body 11 Ceramic film (first film)
21 Fluororesin film (second film)
30 Rotary type refrigerant compressor 40 Reciprocating type refrigerant compressor

Claims (9)

A main body made of a light metal or an alloy thereof, and a first film having wear resistance formed on the surface of the main body,
The sliding member of the refrigerant compressor, wherein the hardness of the first film is HV500 or more.   The sliding member for a refrigerant compressor according to claim 1, wherein the main body is made of an aluminum alloy, and the first film is a ceramic film formed on a surface of the main body.   The sliding member of the refrigerant compressor according to claim 1 or 2, wherein the thickness of the first film is 20 microns or less.   The sliding member for a refrigerant compressor according to any one of claims 1 to 3, further comprising a self-lubricating second film formed on the main body so as to overlap the surface of the first film.   The refrigerant compressor which has a sliding member as described in any one of Claim 1 to 4, and a supporting member which supports the said sliding member so that reciprocation is possible. A fixed scroll, an orbiting scroll combined with the fixed scroll, and an Oldham link that supports the orbiting scroll so as to be capable of revolving orbiting relative to the fixed scroll,
The Oldham link is a main body made of a light metal or an alloy thereof,
A scroll type refrigerant compressor which is a sliding member having a first film having a Vickers hardness of 500 or more formed on the surface of the main body. A pair of a cylindrical housing, a rotor that rotates inside the housing, and a rotor that is supported by the rotor so as to be capable of reciprocating in the radial direction of the rotor and that is pressed against the inner surface of the housing by a spring disposed inside the rotor. With vanes,
The pair of vanes includes a main body made of a light metal or an alloy thereof,
A rotary type refrigerant compressor which is a sliding member having a first film having a Vickers hardness of 500 or more formed on the surface of the main body. A cylinder, a piston arranged to contact the inner surface of the cylinder, and a piston rod connected to the piston and reciprocatingly moving the piston in the length direction of the cylinder inside the cylinder;
The piston is a main body made of a light metal or an alloy thereof,
A reciprocating refrigerant compressor which is a sliding member having a first film having a Vickers hardness of 500 or more formed on the surface of the main body. A refrigerant compressor that compresses the refrigerant gas; a condenser that condenses / liquefies the refrigerant gas compressed by the compressor to dissipate heat; an expansion valve that adiabatically expands and depressurizes the liquid refrigerant that has passed through the capacitor; and the expansion valve An evaporator that evaporates / vaporizes the liquid refrigerant that has passed through and absorbs heat, and the refrigerant compressor, condenser, expansion valve, and evaporator are connected via a pipe that circulates and conveys the refrigerant, and heat-transfers the refrigerant. An air conditioning system that performs air conditioning by heat transfer between the condenser and the evaporator as a medium,
The sliding member of the refrigerant compressor includes a main body made of light metal or an alloy thereof, and a first film having wear resistance formed on the surface of the main body, and the hardness of the first film is HV500 or more. An air conditioning system.

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