Rotary compressor

• US 10,550,843 B2
• Filed: 11/26/2015
• Issued: 02/04/2020
• Est. Priority Date: 01/13/2015
• Status: Active Grant

• Current Assignee: Fujitsu General Company Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fujitsu General Company Limited (Fujifilm Holdings Corporation)
• Inventors: Tanaka, Junya, Furukawa, Motonobu, Morishita, Taku, Morozumi, Naoya
• Primary Examiner(s): Wan, Deming
• Application Number:
  US15/542,536
• Publication Number:
  US 20180023567A1
• Time in Patent Office: 1,531 Days
• CPC Class Codes: F01C 21/0881 the vanes consisting of two or more parts
• CPC Class Codes: F04C 18/07 having crankshaft-and-connecting-rod type drive
• CPC Class Codes: F04C 18/324 with vanes hinged to the inner member and reciprocating with respect to the outer member
• CPC Class Codes: F04C 18/356 with vanes reciprocating with respect to the outer member
• CPC Class Codes: F04C 2210/268 R32
• CPC Class Codes: F04C 23/00 Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids F04C25/00 takes precedence
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 29/00 Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
• CPC Class Codes: F04C 29/0028 Internal leakage control
• CPC Class Codes: F04C 29/047 Cooling of electronic devices installed inside the pump housing, e.g. inverters
• CPC Class Codes: F04C 29/128 of the elastic type, e.g. reed valves
• CPC Class Codes: F15B 2201/3156 characterised by their attachment
• CPC Class Codes: F16C 2360/42 Pumps with cylinders or pistons in general F04B
• CPC Class Codes: F25B 1/04 with compressor of rotary type F25B1/005, F25B1/10 take precedence
• CPC Class Codes: F25B 13/00 Compression machines, plants or systems, with reversible cycle defrosting cycles F25B47/02
• CPC Class Codes: F25B 2400/23 Separators

Abstract

A rotary compressor includes a sealed longitudinal compressor housing which is provided with a discharge portion of a refrigerant at an upper portion thereof, is provided with an inlet portion of a refrigerant at a lower portion thereof, and in which lubricant oil is stored; a compressing unit which is disposed in the compressor housing, compresses a refrigerant sucked from the inlet portion and discharges the refrigerant from the discharge portion; a motor which is disposed in the compressor housing and drives the compressing unit via a rotation shaft; and an accumulator which is attached to a side portion of the compressor housing and is connected to the inlet portion of the refrigerant. When an inner diameter of a cylinder constituting the compressing unit is referred to as Dc, a height of the cylinder is referred to as Hc, and an eccentric amount of an eccentric portion of the rotation shaft is referred to as e, Dc, Hc, and e are set so that a value obtained by an expression (e+Hc)·(Dc−e)^1/3/(e·Hc)^2/3 is less than 4.1.

Claims

1. A rotary compressor, comprising:

a sealed longitudinal compressor housing which is provided with a discharge portion of a refrigerant at an upper portion thereof, is provided with an inlet portion of the refrigerant at a lower portion thereof, and in which lubricant oil is stored;

a compressing unit which is disposed in the compressor housing, compresses the refrigerant sucked from the inlet portion and discharges the refrigerant from the discharge portion;

a motor which is disposed in the compressor housing and drives the compressing unit;

a rotation shaft which is rotated by the motor; and

an accumulator which is attached to a side portion of the compressor housing and is connected to the inlet portion of the refrigerant,

wherein the rotation shaft includes an eccentric portion in which a piston of the compressing unit is fitted,

R32 is used as the refrigerant,

when an inner diameter of a cylinder constituting the compressing unit is referred to as Dc [mm], a height of the cylinder is referred to as He [mm], and an eccentric amount of the eccentric portion of the rotation shaft is referred to as Dc [mm], He [mm], and e [mm] are set so that a value obtained by an expression (e+Hc)−

(Dc−

e)^1/3/(e−

Hc)^2/3 is less than 4.1, and

when a cylinder chamber capacity of the cylinder is referred to as V [cc/rev] and an inner diameter of an inlet hole of the cylinder is referred to as Dk [mm], V [cc/rev] and Dk [mm] are set so that a value [(cc/rev)²/mm⁴] obtained by an expression of 70V²/Dk⁴ is 1.5 or less.

2. The rotary compressor according to claim 1,

wherein V [cc/rev] and Dk [mm] are set so that the value [(cc/rev)²/mm⁴] obtained by the expression of 70V/Dk⁴ is 1.0 or more and 1.5 or less and Dk [mm] and Hc [mm] are set so that an expression (Dk+4)≤

Hc≤

(Dk+8) is satisfied.

3. The rotary compressor according to claim 1,

wherein when the cylinder chamber capacity of the cylinder is referred to as V [cc/rev] and an eccentric amount of an eccentric portion of the rotation shaft is referred to as e [mm] and V [cc/rev] are set so that the value obtained by an expression of e/V^1/3 is a value exceeding 0.215.

4. The rotary compressor according to claim 3,

wherein a diameter of a sub-shaft unit of the rotation shaft is further decreased than a diameter of a main shaft unit.

5. The rotary compressor according to claim 3,

wherein e [mm] and V [cc/rev] are set so that the value obtained by the expression of e/V^1/3 is less than 0.240.

6. The rotary compressor according to claim 3,

wherein when a nominal diameter of a penetrating bolt, which fastens an end plate that is a configuration component of the compressing unit to the cylinder that is a configuration component of the compressor unit, is referred to as d [mm] and a chamfer size of a screw hole, which is provided to the cylinder and into which the penetrating bolt is fastened, is referred to as M [mm], the height Hc [mm] of the cylinder is set so that a relationship of 2×

(d+M)+1.0≤

Hc≤

2×

(d+M)+2.5 is satisfied.

7. The rotary compressor according to claim 1,

wherein the lubricant oil includes an extreme pressure additive is added to the lubricant oil.

8. The rotary compressor according to claim 1,

wherein a viscosity grade of the lubricant oil is ISO VG68 or higher.

9. The rotary compressor according to claim 1,

wherein a lubricant oil for refrigerant R410A which is not compatible with R32, is used as the lubricant oil.

10. The rotary compressor according to claim 1, wherein a mixture of a lubricant oil which is compatible with the refrigerant R32 and a lubricant oil for refrigerant R410A which is not compatible with refrigerant R 32, is used as the lubricant oil.

11. The rotary compressor according to claim 1, wherein when a nominal diameter of a penetrating bolt, which fastens an end plate that is a configuration component of the compressing unit to the cylinder, is referred to as d [mm] and a chamfer size of a screw hole, which is provided to the cylinder and into which the penetrating bolt is fastened, is referred to as M [mm], the height He [mm] of the cylinder is set so that relationship of 2×

(d+M)+1.0 Hc≤

2×

(d+M)+2.5 is satisfied.