JP2011236749A - Compressor and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor in which an accumulator has corrosion resistance higher than that of a compressor body.SOLUTION: The compressor includes the compressor body 2 for storing a compression mechanism, and the accumulator 3 arranged outside the compressor body 2 and connected to the compression mechanism via a suction pipe. A painting film 31a formed of paint including a metallic particle M is formed on a surface of a sealed vessel 31 of the accumulator 3, and a painting film 21a formed of the paint including the metallic particle M is formed on a surface of a sealed casing 21 of the compressor body 2. A thickness H2 of the painting film 31a is thicker by H3 than a thickness H1 of the painting film 21a.

Description

  The present invention relates to a compressor provided with a coating film on each surface of a compressor body and an accumulator, and a method for manufacturing the compressor.

  In the outdoor unit in which the compressor with an accumulator is stored, condensation occurs on the surface of the compressor body and the surface of the accumulator connected to the compressor body. Then, when the compressor body and the accumulator are made of, for example, iron, rust is generated. Therefore, for the purpose of rust prevention, a rust preventive paint is applied to the surface to form a coating film.

  As such a compressor, for example, Patent Document 1 includes a compressor main body having a sealed case and a cylindrical accumulator fixed to the compressor main body by fixing means, and the compressor main body and the accumulator are coated. An enclosed compressor is disclosed. Conventionally, such a compressor 100 is manufactured by a method in which a compressor main body 200 and an accumulator 300 are connected and assembled through a suction pipe 400, and the assembled product is dip coated, as shown in FIG. It has been.

JP 2007-045772 A

  By the way, in an outdoor unit in which a compressor with an accumulator is stored, dew condensation occurs on the surface of the compressor body and the surface of the accumulator connected to the compressor body. However, liquid refrigerant is accumulated inside the accumulator. More dew condensation occurs on the surface. Therefore, the surface of the accumulator tends to rust compared to the surface of the compressor body. In particular, when an outdoor unit is used in a beach area, salt damage is prominent in the accumulator because the atmosphere contains more salt than in other areas. Therefore, the surface of the accumulator needs to have higher corrosion resistance than the surface of the compressor body.

  However, in the conventional coating, a coating film having substantially the same thickness composed of the same type of coating is formed on each surface of the compressor main body and the accumulator, so that the coating may not be sufficient for the accumulator.

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a compressor in which the accumulator has higher corrosion resistance than the compressor body, and a method for manufacturing the compressor.

  A compressor according to a first aspect of the present invention includes a compressor main body that houses a compression mechanism, and an accumulator that is disposed outside the compressor main body and is connected to the compression mechanism via a suction pipe, on the surface of the accumulator. Is formed with a paint film made of paint containing metal particles, and a paint film made of paint containing metal particles is formed on the surface of the compressor body. The coating film formed on the surface of the accumulator is thicker than the coating film formed on the surface of the compressor body.

  In this compressor, the accumulator can have higher corrosion resistance than the compressor body.

  The compressor according to the second invention is the compressor according to the first invention, wherein the paint constituting the coating film formed on the surface of the accumulator forms the coating film formed on the surface of the compressor main body. Are the same.

  In this compressor, manufacturing cost can be suppressed and the accumulator can be provided with higher corrosion resistance than the compressor body.

  According to a third aspect of the present invention, there is provided a compressor manufacturing method comprising: a compressor body that houses a compression mechanism; and an accumulator disposed outside the compressor body and connected to the compression mechanism via a suction pipe. A first manufacturing process for forming a coating film composed of a paint containing metal particles on a surface of an accumulator, and a coating film composed of a paint containing metal particles on a surface of a compressor body The coating film formed on the surface of the accumulator is thicker than the coating film formed on the surface of the compressor body.

  In this compressor manufacturing method, it is possible to manufacture a compressor in which the accumulator has higher corrosion resistance than the compressor body.

  According to a fourth aspect of the present invention, there is provided a compressor manufacturing method comprising: a compressor body that houses a compression mechanism; and an accumulator that is disposed outside the compressor body and connected to the compression mechanism via a suction pipe. A method of manufacturing a compressor, wherein a first coating step for forming a coating film made of a paint containing metal particles on the surface of an accumulator, and a compression mechanism and an inhaler for the accumulator formed with the coating film in the first coating step A connection step of connecting through a pipe, and a second coating step of forming a coating film composed of a paint containing metal particles on the surface of the compressor body and the surface of the accumulator, and the surface of the accumulator The coating film formed on is thicker than the coating film formed on the surface of the compressor body.

  In this compressor, it is possible to manufacture a compressor in which the production cost is suppressed and the accumulator has higher corrosion resistance than the compressor body.

  As described above, according to the present invention, the following effects can be obtained.

  In 1st invention, an accumulator can be equipped with corrosion resistance higher than a compressor main body by forming the coating film thicker than the thickness of the coating film formed in the surface of the compressor main body on the surface of an accumulator.

  In the second invention, by forming the coating film formed on the surface of the accumulator and the surface of the compressor body with the same paint, the accumulator may have higher corrosion resistance than the compressor body while suppressing the manufacturing cost. it can.

  According to a third aspect of the present invention, there is provided a compressor in which the accumulator has a higher corrosion resistance than the compressor body by forming a paint film thicker than the thickness of the paint film formed on the surface of the compressor body on the surface of the accumulator. can do.

  In the fourth invention, the coating film on the accumulator surface is made thicker than the coating film on the compressor body surface by increasing the number of times the surface of the accumulator is painted over the number of times the surface of the compressor body is painted. It is possible to provide a compressor in which the accumulator has higher corrosion resistance than the compressor body while suppressing the manufacturing cost.

It is sectional drawing of the compressor which concerns on embodiment of this invention. It is sectional drawing of the container surface of the compressor main body and accumulator which concerns on embodiment of this invention, (A) is sectional drawing of the container surface of a compressor main body, (B) is sectional drawing of the container surface of an accumulator. It is. It is a figure which shows the manufacturing method of the compressor which concerns on embodiment of this invention. It is a figure which shows the manufacturing method of the conventional compressor.

[This embodiment]
Hereinafter, an embodiment of a compressor according to the present invention will be described based on the drawings.

  FIG. 1 is a cross-sectional view of a compressor 1 according to an embodiment of the present invention, and FIG. 2 is a surface cross-sectional view of a compressor main body 2 and an accumulator 3 constituting the compressor 1. Hereinafter, the compressor 1 according to the present embodiment will be described with reference to the drawings.

  As shown in FIG. 1, the compressor 1 is a one-cylinder rotary compressor, and includes a compressor body 2 in which a drive mechanism 22 and a compression mechanism 23 are housed in a hermetic casing 21, and an outer side of the compressor body 2. And an accumulator 3 connected to the compressor 2 via the suction pipe 4. The compressor main body 2 is a so-called high-pressure dome type compressor, and a compression mechanism 23 is disposed below the drive mechanism 22 in the sealed casing 21. A lubricating oil 24 supplied to each sliding portion of the compression mechanism 23 is stored in the lower portion of the hermetic casing 21.

  The drive mechanism 22 is provided to drive the compression mechanism 23, and includes a motor 25 serving as a drive source and a shaft 26 attached to the motor 25.

  The motor 25 has a rotor 25a and a stator 25b disposed on the radially outer side of the rotor 25a via an air gap. A shaft 26 is rotatably attached to the rotor 25a. The motor 25 rotates the rotor 25a together with the shaft 26 by an electromagnetic force generated in the stator 25b by passing a current through the coil.

  The shaft 26 rotates with the above-described rotor 25a, thereby rotating the roller 27a of the compression mechanism 23. The shaft 26 is provided with an eccentric portion 26 a so as to be positioned in the cylinder chamber B <b> 1 of the cylinder 28. A roller 27a is attached to the eccentric portion 26a. Thereby, with rotation of the shaft 26, the roller 27a attached to the eccentric part 26a can rotate in the cylinder chamber B1.

  On the other hand, the compression mechanism 23 is provided to compress and discharge the refrigerant sucked from the accumulator 3 through the suction hole 28a. The refrigerant discharged by the compression mechanism 23 passes through the air gap between the stator 25b of the drive mechanism 22 and the rotor 25a, cools the drive mechanism 22, and is then discharged from the discharge pipe 29. The compression mechanism 23 includes a front muffler 23a, a front head 23b, a cylinder 28, a roller 27a, and a rear head 23c from the top to the bottom along the rotation axis of the shaft 26 of the drive mechanism 22. Yes.

  Further, in the sealed casing 21 of the compressor main body 2, a refrigerant circulates in order to cool the components of the drive mechanism 22 housed in the sealed casing 21. Since the temperature of the refrigerant is transmitted to the surface of the sealed casing 21, condensation occurs. Therefore, if the corrosion resistance is not given to the surface of the sealed casing 21, it will corrode.

  Therefore, a coating film 21a is formed on the surface of the sealed casing 21 as shown in FIG. The coating film 21a is formed of a paint mainly composed of metal particles M, a resin, and a solvent. The metal particles M are made of a metal having a larger ionization tendency than the metal m constituting the sealed casing 21. Therefore, when the outside air comes into contact with the coating film 21a, the metal particles M are ionized instead of the metal m constituting the sealed casing 21, and are combined with oxygen molecules in the outside air to become oxides. For this reason, corrosion of the sealed casing 21 can be prevented. For example, when the sealed casing 21 is made of iron, zinc having a higher ionization tendency than iron is used as the metal particles M. In addition, the resin serves as an adhesive in the paint, and for example, a water-soluble alkyd resin is used. The solvent is for uniformly dispersing the material constituting the paint, and for example, butyl cellosolve or the like is used. The film thickness H1 of the coating film 21a is determined by a balance between being able to follow expansion and contraction of the sealed casing 21 due to a temperature change and sufficient corrosion resistance, and is, for example, 15 to 30 μm.

  The accumulator 3 is connected between a four-way switching valve (not shown) and the compressor main body 2, and in the refrigerant circuit according to fluctuations in the operating load of the air conditioner having the compressor 1 as a component. The airtight container 31 which can store the excess refrigerant | coolant which generate | occur | produces in is included.

  The refrigerant stored in the hermetic container 31 is a liquid (for example, liquid carbon dioxide), and the hermetic container 31 is made of metal m like the hermetic casing 21 of the compressor body 2, and the inside is a liquid refrigerant. Direct contact. For this reason, the surface temperature of the airtight container 31 is lower than the surface temperature of the airtight casing 21 of the compressor body 2, and more dew condensation is formed on the surface of the airtight container 31 than the surface of the airtight casing 21 of the compressor body 2. Arise. Therefore, the sealed container 31 is more easily corroded than the sealed casing 21 of the compressor body 2. In particular, in the beach area, the salt damage in the accumulator 3 is more significant than in the compressor body 2 because the atmosphere contains a large amount of salt.

  Therefore, a coating film 31a made of a paint containing metal particles M painted on the surface of the closed casing 21 of the compressor body 2 is also formed on the surface of the closed container 31 of the accumulator 3. Is formed thicker than the film thickness H1 of the coating film 21a formed on the surface of the sealed casing 21. The film thickness H2 of the coating film 31a is thicker by H3 than the film thickness H1 of the coating film 21a, for example, 30 to 100 μm.

[Features of Compressor according to this Embodiment]
The compressor according to this embodiment has the following characteristics.

  In the compressor 1 according to the present embodiment, the surface of the accumulator 3 is formed on the surface of the accumulator 3 by forming a coating film 31a thicker than the coating film 21a formed on the surface of the compressor body 2. Corrosion resistance higher than the surface corrosion resistance can be provided.

[Method for Manufacturing Compressor According to this Embodiment]
Next, a method for manufacturing the compressor 1 according to the present embodiment will be described with reference to the drawings.

  FIG. 3 is a diagram showing a flow of manufacturing the compressor according to the present embodiment. A method for manufacturing the compressor 1 according to the present embodiment will be described with reference to FIG.

  First, for example, an iron phosphate film treatment is performed on the surface of the accumulator 3 in which the suction pipe 4 is inserted in order to improve the coating performance. Next, as shown in FIG. 3A, the coating film containing the metal particles M is dip-coated and dried to form a coating film having a film thickness H3. Immersion coating and forced drying are performed under conditions such that the film thickness after forced drying is H3. The conditions for the dip coating are, for example, a paint temperature of 25 ° C. Moreover, the time (setting time) which performs natural drying from immersion coating to forced drying shall be 7 minutes, for example. Moreover, the conditions of forced drying shall be 130 degreeC and 20 minutes, for example.

  Next, as shown in FIG. 3 (B), the compressor main body 2 whose surface is treated with, for example, an iron phosphate film and the accumulator 3 with a coating film having a film thickness H3 are connected via a suction pipe 4. And assemble.

  And as shown in FIG.3 (C), both surfaces of the assembled compressor main body 2 and the accumulator 3 are immersion-coated using the coating material containing the metal particle M, and are forcedly dried. In this coating, the coating film 21a formed on the surface of the compressor body 2 after forced drying is coated such that the film thickness is H1. Accordingly, the thickness of the coating film 31a formed on the surface of the accumulator 3 after coating is (H1 + H3) (= H2).

[Features of Manufacturing Method of Compressor According to this Embodiment]
The compressor manufacturing method according to the present embodiment has the following characteristics.

  In the compressor manufacturing method according to the present embodiment, the surface of the compressor main body 2 is applied only once, but the surface of the accumulator 3 is coated twice so that the coating film on the surface of the accumulator 3 is compressed. It is formed thicker than the coating film on the surface of the main body 2, and the accumulator 3 can be given higher corrosion resistance than the compressor main body 2. Moreover, in the conventional compressor manufacturing method, since the surface of the compressor body 2 was imparted with the same degree of corrosion resistance as the accumulator 3, more paint was consumed than necessary, but the manufacturing method according to the present embodiment Then, since the thick coating is given only to the surface of the accumulator 3 which needs countermeasures against salt damage, manufacturing cost can be suppressed.

[Modification of Manufacturing Method of Compressor According to this Embodiment]
The compressor manufacturing method according to the present embodiment has the following modifications.

  In the manufacturing method according to the above-described embodiment, first, a coating film is formed on the surface of the accumulator 3, the accumulator 3 provided with the coating film is connected to the compressor body 2 that is not coated, and the connected accumulator 3 and compressor are connected. A compressor was manufactured by forming a coating film on the main body 2. In addition, after forming a coating film having a thickness of H1 on the surface of the compressor body 2 and forming a coating film having a thickness of H2 (> H1) on the surface of the accumulator 3, the compressor body 2 and the accumulator 3 are connected. May be.

[Features of Modification of Manufacturing Method of Compressor According to this Embodiment]
The modification of the compressor manufacturing method according to the present embodiment has the following characteristics.

  The coating film on the surface of the accumulator 3 is formed thicker than the coating film on the surface of the compressor main body 2, and it becomes possible to give the accumulator 3 higher corrosion resistance than the compressor main body 2. Moreover, in the conventional compressor manufacturing method, since the surface of the compressor body 2 was imparted with the same degree of corrosion resistance as the accumulator 3, more paint was consumed than necessary, but the manufacturing method according to the present embodiment Then, since the thick coating is given only to the surface of the accumulator 3 which needs countermeasures against salt damage, manufacturing cost can be suppressed.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  In the present embodiment, the thickness H2 (= H1 + H3) of the coating film 31a of the accumulator 3 is set to 30 to 100 μm. However, the thickness is not limited to this range, and the corrugated container 31 of the accumulator 3 has sufficient corrosion resistance at the same time. It only has to be.

  In the manufacturing method according to the present embodiment, the accumulator 3 is coated and then connected to the compressor main body 2, and after the connection, the compressor main body 2 and the accumulator 3 are coated. However, the present invention is not limited to this, and the accumulator 3 is painted. Any process may be used as long as the film 31a is formed thicker than the coating film 21a of the compressor body 2. For example, after connecting the accumulator and the compressor main body, only the accumulator may be applied, and then the both surfaces of the accumulator and the compressor main body may be applied.

  By using the present invention, it is possible to provide a compressor in which an optimum antirust coating is applied to each outer surface of the compressor body and the accumulator, and a method for manufacturing the compressor.

DESCRIPTION OF SYMBOLS 1 Compressor 2 Compressor body 3 Accumulator 21 Sealed casing 31 Sealed container 21a Paint film 31a Paint film

Claims (4)

A compressor body that houses the compression mechanism;
An accumulator disposed outside the compressor body and connected to the compression mechanism via a suction pipe,
On the surface of the accumulator, a coating film made of a paint containing metal particles is formed,
On the surface of the compressor body, a coating film made of a paint containing metal particles is formed,
The coating film formed on the surface of the accumulator is thicker than the coating film formed on the surface of the compressor body.
A compressor characterized by that. The paint constituting the paint film formed on the surface of the accumulator is the same as the paint constituting the paint film formed on the surface of the compressor body.
The compressor according to claim 1. A compressor manufacturing method comprising: a compressor main body that houses a compression mechanism; and an accumulator disposed outside the compressor main body and connected to the compression mechanism via a suction pipe,
A first coating step of forming a coating film composed of a paint containing metal particles on the surface of the accumulator;
A second coating step of forming a coating film made of a paint containing metal particles on the surface of the compressor body,
The coating film formed on the surface of the accumulator is thicker than the coating film formed on the surface of the compressor body.
A compressor manufacturing method characterized by the above. A compressor manufacturing method comprising: a compressor main body that houses a compression mechanism; and an accumulator disposed outside the compressor main body and connected to the compression mechanism via a suction pipe,
A first coating step of forming a coating film composed of a paint containing metal particles on the surface of the accumulator;
A connecting step of connecting the accumulator having the coating film formed in the first coating step through the compression mechanism and the suction pipe;
A second coating step of forming a coating film made of a paint containing metal particles on the surface of the compressor body and the surface of the accumulator;
The coating film formed on the surface of the accumulator is thicker than the coating film formed on the surface of the compressor body.
A compressor manufacturing method characterized by the above.

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