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Screw compressor

A screw compressor and screw technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as reducing compressor efficiency, and achieve the effect of improving compressor efficiency and reducing ejection work.

Inactive Publication Date: 2013-04-10
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the pressure of the latter helical groove is transmitted to the previous helical groove, which increases the work done by the ejection and reduces the efficiency of the compressor.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] The screw compressor 1 according to Embodiment 1 of the present invention is installed in a refrigerant circuit performing a refrigeration cycle, and compresses refrigerant. screw compressor 1, such as figure 2 , 3 As shown, it is formed as an airtight type. In this screw compressor 1 , a compression mechanism 20 and a motor (not shown) that drives it are housed in one housing 10 . The compression mechanism 20 is connected to the motor via a drive shaft 21 . In addition, a low-pressure space S1 into which low-pressure gas refrigerant is introduced from the evaporator of the refrigerant circuit to guide the low-pressure gas to the compression mechanism 20 and a high-pressure gas discharged from the compression mechanism 20 are divided and formed in the housing 10 . The high-pressure space S2 of the refrigerant.

[0051] Compression mechanism 20 includes one screw rotor 40 , cylindrical wall 11 constituting a part of housing 10 and defining screw rotor housing chambe...

Embodiment approach 2

[0105] Next, the spool valve according to Embodiment 2 of the present invention will be described.

[0106] The spool valve 207 of Embodiment 2 differs from Embodiment 1 in the structure of the mouth part. About the structure of other screw compressors, it is the same as Embodiment 1. Therefore, the same reference numerals are used for the same configurations as those in Embodiment 1, description thereof will be omitted, and different configurations will be mainly described.

[0107] The spool valve 207 of Embodiment 2, such as Figure 13 As shown, the partition wall 276 is formed in a substantially L-shape in the mouth portion 272 .

[0108] In detail, the partition wall 276 is viewed from the front side (advance side, forward side, Figure 12 the lower side of the Figure 12 The upper side of the spool 207 extends substantially parallel to the inclined surface 271b of the valve main body 271, then bends in the axial direction of the spool valve 207, and extends in the ax...

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Abstract

A decrease in efficiency of a compressor is prevented which is caused by allowing two adjacent helical grooves to be simultaneously open in a discharge port. A screw compressor (1) includes a screw rotor (40), a casing (10) for containing the screw rotor (40) and provided with the discharge port on an inner peripheral surface thereof, and a gate rotor (50) having gates (51, 51, ...) meshing with the helical grooves (41) of the screw rotor (40), and compresses gas in a compression chamber (23) formed by the screw rotor (40), the casing (10), and the gate rotor (50) to discharge this gas from the discharge port. The discharge port is divided into a first port (74b) and a second port (75b), in a state of two adjacent helical grooves (41, 41) among the helical grooves (41) being open in the discharge port with rotation of the screw rotor (40), one of the two adjacent helical grooves (41, 41) being open in the first port (74b), the other being open in the second port (75b).

Description

technical field [0001] The invention relates to a screw compressor. Background technique [0002] Conventionally, a single-screw compressor including a single screw rotor, a housing for accommodating the screw rotor, and two gate rotors is known as a compressor for compressing gas such as refrigerant or air (see Patent Document 1). [0003] The screw compressor forms a compression chamber through a closed space divided by the spiral groove of the screw rotor, the casing and the gate of the gate rotor. The screw compressor rotates the screw rotor to relatively move the gate in the helical groove of the screw rotor to compress the gas in the compression chamber. In addition, a discharge port is provided on the casing at a position corresponding to the terminal end of the helical groove of the screw rotor. As the screw rotor rotates, the helical groove opens to the discharge port, and compressed high-pressure gas is discharged from the discharge port. [0004] Patent Document...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/00F04C18/52F04C29/12
CPCF04C2240/30F04C27/004F04C2240/603F04C18/16F04C23/001F04C2240/52F04C18/52F04C29/124F04C27/007F01C17/02F04C29/0078F04C2270/16F04C2270/58F04C2270/17
Inventor 藤原秀规后藤英之宫村治则后藤望
Owner DAIKIN IND LTD