CN202001307U

CN202001307U - Rotary compressor

Info

Publication number: CN202001307U
Application number: CN2010206856484U
Authority: CN
Inventors: 高斌
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2010-12-28
Filing date: 2010-12-28
Publication date: 2011-10-05
Anticipated expiration: 2020-12-28

Abstract

The utility model relates to a rotary compressor, which comprises a compression assembly and a motor which are arranged in a shell, wherein the compression assembly comprises an air cylinder; a long bearing and a short bearing for supporting an eccentric crankshaft are respectively arranged at both sides of the air cylinder, and a binding post connected with an external power source is arranged on the shell between the compression assembly and the motor. The motor comprises a motor stator and a motor rotor, wherein the motor stator comprises a stator iron core and a stator winding; the inside of the shell is separated by the long bearing into a high-pressure cavity located at the top part and a low-pressure cavity located at the lower part; the compression assembly is arranged above the motor; and the stator winding is a centralized winding. The utility model not only can be suitable for the rotary compressor adopting a hydrocarbon refrigerant but also can be suitable for the rotary compressor adopting other flammable refrigerants such as R161 or R32 and the like. Moreover, the rotary compressor has the characteristics of simple and reasonable structure, simplicity in assembly, high electric safety performance, reliability in operation and wide application range.

Description

Rotary compressor

Technical field

The utility model relates to a kind of rotary compressor.

Background technique

The R22 refrigeration agent is classified as the refrigeration agent that time limit is progressively eliminated by " Montreal is agreed " book.Europe, Japan begin to turn to the R410A refrigeration agent to substitute already, and the U.S. also will forbid that in 2010 R22 uses in new refrigeration product.China has also accelerated the paces that R22 eliminates, and will be frozen in the average level in 2009～2010 years in 2013, will reach 10% the requirement of cutting down baseline values in 2015.And more domestic main brands also begin to release the environment-friendly air conditioner of R410A as refrigeration agent.Yet the GWP value of R410A is also bigger than R22, and " Kyoto Protocol " classified R410A as the greenhouse gases of controlled discharge, and all R410A never are long-range replacement schemes.

As HCFC and HFC, as the alternative refrigerant of R22, R410A, R407C etc., existing carbon-hydrogen refrigerant industry is the most paid close attention to.But, when carbon-hydrogen refrigerant is used for air-conditioner system, a very important problem is arranged, be exactly that it has high combustibility, must limit the refrigeration agent enclosed volume of hydrocarbon air-conditioner system.Therefore, be necessary to reduce significantly the amount of refrigerant in the compressor housing, thereby make that the refrigeration agent enclosed volume of air conditioner machine system is also reduced.The structure that compressor inside is arranged to have than the superposed hyperbaric chamber in the low-pressure cavity that is positioned at the bottom of large space and less space can reduce the amount of refrigerant of compressor inside preferably.

Be arranged in the compressor on the top of compression assembly in prior motor, tenminal block is arranged on the upper shell, after the hot charging that can finish the welding assembling of compression assembly and main casing and motor and main casing is earlier joined, the motor lighting outlet is connected with tenminal block, top shell component and main casing that tenminal block will be housed again weld assembling, like this, can better guarantee the installation reliability of tenminal block, and this moment, tenminal block was positioned at the upper shell place of compressor, can not contact, guarantee electrical safety with oil sump.Yet, be in the compressor of high low pressure structure in housing, motor is arranged in the low-pressure cavity of bottom, and connect the tenminal block of external power supply if be installed in motor lower portion, promptly near the position of lower shell body, or be arranged on the lower shell body, exist and occur the electrical security problem in the oil sump owing to tenminal block is immersed in, there is huge potential safety hazard in this to the compressor that uses flammable carbon-hydrogen refrigerant, and, in joining, also damages the motor stator hot charging tenminal block easily.Therefore, tenminal block need be arranged on the top of motor, and promptly near the position of compression assembly, and because separate by bearing in the high low pressure chamber, when especially separating by long bearing, the space between long bearing and the motor is less.

Referring to Fig. 1, adopt for staor winding in the housing of motor of distributed winding 29a to be the rotary compressor in the past of high low pressure structure.The housing of this compressor is made up of upper shell 11, main casing 12 and lower shell body 13.The inner space of compressor is separated into by long bearing 26 and being tightly connected of main casing 12 and is positioned at the hyperbaric chamber 1 that top is communicated with exhaust, with be positioned at bottom and the air-breathing low-pressure cavity that is communicated with 2, compression assembly 20 is positioned at the top of motor, and oil sump 3 is positioned at lower shell body 13.When needs are connected by tenminal block 16 motor with external power supply, because the height B of distributed winding 29a is higher and wide, occupation space is big, cause the width A of connection space of motor and tenminal block 16 less, cause assembly process process poor, further reduced the space between compression assembly and the motor, thereby make when tenminal block 16 is arranged on the main casing between compression assembly and the motor, the lighting outlet that tenminal block is connected with motor can't be installed, or is difficult to guarantee the hidden danger of electrical safety after the existence installation.L among the figure is that upper-end surface from rotor 28 is to the distance long bearing 26 lower end surfaces; S is that lower end surface from motor stator 28 is to the distance the upper-end surface of lower shell body 13.

Perhaps, when in the past rotary compressor adopts the constant-seed motor of traditional permanent magnet or ferritic variable-frequency motor, for power or the efficient that guarantees motor, usually the height of motor is also higher, thereby the height that is installed in the rotor on the bent axle is higher, and like this, the quality of rotor can be bigger.In order to allow tenminal block be installed on the main casing between compression assembly and the motor, need under the part situation the downward housing direction in position that motor is installed is moved, to increase the installation of satisfying tenminal block in motor and the space between the compression assembly and to be connected, yet, under the long bearing height situation of setting, after moving down the mounting point of motor, distance between the end face of rotor end-face and long bearing can increase, can increase the distortion of eccentric crankshaft in operation process like this, thereby have influence on the reliability of compressor.

The model utility content

The purpose of this utility model aims to provide a kind of simple and reasonable, easy assembling, rotary compressor that electrical safety performance is good, reliable, applied widely, to overcome deficiency of the prior art.

A kind of rotary compressor by this purpose design, comprise the compression assembly and the motor that are arranged in the housing, compression assembly comprises cylinder, the long bearing and the minor axis that are used to support eccentric crankshaft hold the both sides that are separately positioned on cylinder, and the tenminal block that external power supply joins is set in place on the housing between compression assembly and the motor, motor comprises motor stator and rotor, motor stator comprises stator iron core and staor winding, enclosure interior is divided into superposed hyperbaric chamber by long bearing and is positioned at the low-pressure cavity of bottom, compression assembly is arranged on the top of motor, it is characterized in that staor winding is centralized winding.

Described motor is AC motor or direct current generator.

Described motor is constant-seed motor or variable-frequency motor.

Described motor is ferrite motor or rare-earth magnet motor.

Described motor is for adopting the direct current variable frequency motor of rare-earth magnet.

Described upper-end surface from rotor is to 1.5 times of the diameter of the major axis of the distance≤eccentric crankshaft of the lower end surface of long bearing.

The utility model replaces with distributed winding in the past after the centralized winding, reduced the height of the outstanding stator iron core of centralized winding, the space that makes centralized winding take between compression assembly and the motor is little, the tenminal block of compressor can be arranged on like this on the housing between compression assembly and the motor, both solved the power supply input problem of motor, the Security of tenminal block and the assembly process process problem of compressor have been solved again, and do not need to move down the mounting point or the lengthening eccentric crankshaft of motor, thereby guaranteed the reliability of eccentric crankshaft.Centralized staor winding in the utility model both can be applied in AC motor or the direct current generator, can be applied in again in constant-seed motor or the variable-frequency motor, can also be applied in ferrite motor or the rare-earth magnet motor, and it has advantage of wide range of application.

Constant-seed motor or ferritic variable-frequency motor that the utility model is incited somebody to action permanent magnet in the past replace with direct current variable frequency motor, particularly replace with after the direct current variable frequency motor of rare earth element magnet, can be under the situation that the power of guaranteeing motor and efficient do not reduce, reduce the height of motor greatly, can alleviate the quality of rotor on the one hand, no matter whether the mounting point of motor needs to move down certain distance, also the distortion that can guarantee eccentric crankshaft is in allowed band, thereby guarantees the operating reliability of compressor; On the other hand, after the height of motor reduces, keeping from the lower end surface of motor to the distance of the upper-end surface of lower shell body during with equating in the past, can reduce the distance of compression assembly to oil sump, thereby reduce the fuel feeding height of lubricant oil from oil sump supply compression assembly, the fuel feeding that improves compressor is with lubricated.

The utility model not only goes for adopting the rotary compressor of carbon-hydrogen refrigerant, and goes for adopting other flammable refrigeration agent, as the rotary compressor of R161 or R32 etc.; It has simple and reasonable, easy assembling, good, reliable, the advantage of wide range of application of electrical safety performance.

Description of drawings

Fig. 1 was for adopted the broken section structural representation of the rotary compressor of distributed winding in the past.

Fig. 2 is the utility model first embodiment's a structural representation.

Fig. 3 is the utility model second embodiment's a structural representation.

Among the figure: 1 is hyperbaric chamber, and 2 is low-pressure cavity, and 3 is oil sump, and 11 is upper shell, 12 is main casing, and 13 is lower shell body, and 14 is sucking pipe, and 15 is outlet pipe, 16 is tenminal block, and 20 is compression assembly, and 21 hold for minor axis, 22 is cylinder, and 23 is piston, and 24 is slide plate, 25 is eccentric crankshaft, and 26 is long bearing, and 27 is motor stator, 28 is rotor, and 29a is distributed winding, and 29b is centralized winding.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

First embodiment

Referring to Fig. 2, this rotary compressor, comprise the compression assembly 20 and the motor that are arranged in the housing, compression assembly 20 comprises cylinder 22, be used to support the long bearing 26 of eccentric crankshaft 25 and minor axis and hold 21 both sides that are separately positioned on cylinder 22, and the tenminal block 16 that external power supply joins is set in place on the housing between compression assembly 20 and the motor, motor comprises motor stator 27 and rotor 28, motor stator 27 comprises stator iron core and staor winding, enclosure interior is divided into superposed hyperbaric chamber 1 by long bearing 26 and is positioned at the low-pressure cavity 2 of bottom, compression assembly 20 is arranged on the top of motor, and wherein, staor winding is centralized winding 29b.Housing is made up of upper shell 11, main casing 12 and lower shell body 13.Venting gas appliance is arranged on minor axis and holds.

In the present embodiment, except staor winding is centralized winding 29b, remaining part is all identical with the structure and the size of the component of rotary compressor in the past shown in Figure 1, at this moment, because it is less that centralized winding 29b exceeds the height of motor stator 27 end faces, and from the distance L between the upper-end surface of rotor 28 and long bearing 26 lower end surfaces ' identical with the distance L of in the past rotary compressor, so can keep under the constant substantially situation of original size, guarantee the installing space of motor and tenminal block 16, thereby improve assembly process process and electrical security.

Motor in the present embodiment both can be AC motor or direct current generator, can be again constant-seed motor or variable-frequency motor, can also be ferrite motor or rare-earth magnet motor, and its common characteristic is: staor winding adopts the structure of centralized winding.

Second embodiment

Referring to Fig. 3, this rotary compressor, comprise the compression assembly 20 and the motor that are arranged in the housing, compression assembly 20 comprises cylinder 22, be used to support the long bearing 26 of eccentric crankshaft 25 and minor axis and hold 21 both sides that are separately positioned on cylinder 22, and the tenminal block 16 that external power supply joins is set in place on the housing between compression assembly 20 and the motor, motor comprises motor stator 27 and rotor 28, enclosure interior is divided into superposed hyperbaric chamber 1 by long bearing 26 and is positioned at the low-pressure cavity 2 of bottom, compression assembly 20 is arranged on the top of motor, wherein, motor is the direct current variable frequency motor of the rare earth element magnet of the centralized winding construction of employing.Housing is made up of upper shell 11, main casing 12 and lower shell body 13.Venting gas appliance is arranged on minor axis and holds.

In the present embodiment, under the situation of power that guarantees motor and efficient, the height of whole motor obviously reduces, at this moment, no matter whether need the mounting point of motor is moved to lower shell body 13 directions, promptly from the upper-end surface of rotor 28 to the distance L the lower end surface of long bearing 26 " with respect to the distance L of rotary compressor in the past shown in Figure 1; no matter whether increase; because the height of rotor 28 reduces more with respect to the rotor height of traditional permanent magnet or ferrite lattice; its quality also alleviates more; therefore; even distance L " increases thereupon, also can be under the situation of the size of each component in not changing compression assembly 20, the amount of deformation that guarantees eccentric crankshaft 25 in allowed limits, thereby guarantee the operating reliability of compressor.And, after the height of motor reduces, from the lower end surface of motor stator 28 to the upper-end surface of lower shell body 13 apart from S " during with the equating of rotary compressor in the past shown in Figure 1; also can reduce the distance of compression assembly 20; supply with the fuel feeding height of compression assemblies 20 thereby reduce lubricant oil from oil sump 3, the fuel feeding that improves compressor is with lubricated to oil sump 3 apart from S.

1.5 times of ", distance L is arranged " the diameter D of the major axis of≤eccentric crankshaft 25 that under normal conditions, needs the distance L of restriction from the lower end surface of the upper-end surface of rotor 28 and long bearing 26.

All the other are not stated part and see first embodiment, no longer repeat.

Claims

1. rotary compressor, comprise the compression assembly (20) and the motor that are arranged in the housing, compression assembly (20) comprises cylinder (22), the long bearing (26) and the minor axis that are used to support eccentric crankshaft (25) hold the both sides that (21) are separately positioned on cylinder (22), and the tenminal block that external power supply joins (16) is set in place on the housing between compression assembly (20) and the motor, motor comprises motor stator (27) and rotor (28), motor stator (27) comprises stator iron core and staor winding, enclosure interior is divided into superposed hyperbaric chamber (1) by long bearing (26) and is positioned at the low-pressure cavity (2) of bottom, compression assembly (20) is arranged on the top of motor, it is characterized in that staor winding is centralized winding (29b).

2. rotary compressor according to claim 1 is characterized in that described motor is AC motor or direct current generator.

3. rotary compressor according to claim 1 is characterized in that described motor is constant-seed motor or variable-frequency motor.

4. rotary compressor according to claim 1 is characterized in that described motor is ferrite motor or rare-earth magnet motor.

5. rotary compressor according to claim 1 is characterized in that described motor is for adopting the direct current variable frequency motor of rare-earth magnet.

6. according to the arbitrary described rotary compressor of claim 1 to 5, it is characterized in that described upper-end surface from rotor (28) is to the distance of the lower end surface of long bearing (26) (1.5 times of the diameter (D) of the major axis of L ")≤eccentric crankshaft (25).