WO2021031489A1

WO2021031489A1 - Compressor having early exhaust function and air conditioning system

Info

Publication number: WO2021031489A1
Application number: PCT/CN2019/128047
Authority: WO
Inventors: 龙忠铿; 刘志华; 武晓昆; 曾祥熙; 李磊
Original assignee: 珠海格力电器股份有限公司
Priority date: 2019-08-16
Filing date: 2019-12-24
Publication date: 2021-02-25
Also published as: CN110425134A

Abstract

A compressor having an early exhaust function and an air conditioning system. The compressor comprises a housing (1); a suction cavity (2), a rotor cavity (3), and an exhaust cavity (4) which are communicated in sequence are formed inside the housing (1); one end of the rotor cavity (3) is communicated with the exhaust cavity (4) to form an exhaust channel; and intermediate exhaust holes (34) are formed on the peripheral side of the rotor cavity (3), and a bypass channel (5) is formed between the intermediate exhaust holes (34) and the exhaust cavity (4). The compressor uses intermediate pressure exhaust, alleviates the problem of over-compression of the compressor, and reduces energy consumption of the compressor.

Description

Compressor and air conditioning system with pre-exhaust function

Related application

This disclosure is based on the Chinese patent application with the application number 201910759995.2, the filing date on August 16, 2019, and the invention titled "Compressor and Air Conditioning System with Early Exhaust Function", and claims its priority. The disclosure of the patent application is hereby incorporated into the present disclosure as a whole.

Technical field

The present disclosure relates to the technical field of compression devices, in particular to a compressor and an air conditioning system with an early exhaust function.

Background technique

The screw compressor is a type of rotary positive displacement compressor. Its core component is a pair of female and male rotors that have a spiral shape and mesh with each other. The female and male rotors and the corresponding housing form a closed cavity, which rotates with the rotor Constantly changing to achieve gas compression or expansion. However, when the external environment changes, the difference between the low pressure and the high pressure is small, resulting in a low pressure differential working condition. At this time, the discharge pressure of the compressor is greater than the condensing pressure, that is, the compressor is in an overcompressed state, making the compressor useless Increase, reduce economic benefits.

Summary of the invention

The present disclosure provides a compressor and an air conditioning system with an early exhaust function.

A first aspect of the present disclosure provides a compressor, including a casing, in which a suction cavity, a rotor cavity, and an exhaust cavity are formed in sequence, and one end of the rotor cavity communicates with the exhaust cavity to form an exhaust cavity. An air passage, and an intermediate exhaust hole is opened on the circumferential side of the rotor cavity, and a bypass passage is formed between the intermediate exhaust hole and the exhaust cavity.

In some embodiments, the rotor cavity is divided into a low-pressure suction pressure zone, an intermediate pressure zone, and an exhaust high-pressure zone in a direction from the suction cavity to the discharge cavity, and the low-pressure suction pressure zone The pressure of is less than the pressure of the intermediate pressure zone is less than the pressure of the exhaust high pressure zone, and the intermediate exhaust hole is arranged at the intermediate pressure zone.

In some embodiments, a rotor is provided in the rotor cavity, and a tooth groove is opened on the circumferential side of the rotor. One end of the tooth groove is connected with the low pressure suction pressure zone, and the other end is connected with the exhaust high pressure zone. Zone connection, and the middle vent hole is connected to the inside of the tooth groove.

In some embodiments, a one-way valve is provided in the bypass passage, and the flow direction of the one-way valve is directed from the intermediate pressure zone to the exhaust chamber.

In some embodiments, the check valve is a plunger check valve or a gate check valve.

In some embodiments, a pressure control valve is provided in the bypass passage, a first pressure inlet of the control valve is in communication with the intermediate pressure zone, a second pressure inlet is in communication with the exhaust chamber, and When the pressure in the intermediate pressure zone is greater than the pressure in the exhaust chamber, the pressure control valve controls the bypass passage to open.

In some embodiments, the pressure control valve includes a piston, an escape groove is provided in the bypass passage, the piston is provided in the bypass passage, and one side of the piston forms the first pressure The second pressure inlet is formed on the other side. When the pressure of the first pressure inlet is greater than the pressure of the second pressure inlet, the piston slides into the escape groove and the first pressure inlet In communication with the second pressure inlet, when the pressure of the first pressure inlet is less than or equal to the pressure of the second pressure inlet, the piston escapes from the escape groove and causes the first pressure inlet and the second pressure inlet to The second pressure inlet is disconnected.

In some embodiments, the pressure control valve further includes an elastic member disposed in the avoiding groove, and when the piston slides into the avoiding groove, the elastic member is in a compressed state.

In some embodiments, the elastic member is a spring.

In some embodiments, the number of the intermediate exhaust holes is multiple, and all the intermediate exhaust holes are distributed on the intermediate pressure zone along the direction from the low pressure suction pressure zone to the exhaust high pressure zone , And each of the intermediate exhaust holes and the exhaust cavity form a bypass passage.

A second aspect of the present disclosure provides an air conditioning system including the compressor according to the first aspect of the present disclosure.

Description of the drawings

FIG. 1 is a schematic structural diagram of a compressor with an early exhaust function and an air conditioning system provided by the present disclosure;

2 is a schematic diagram of a rotor cavity of an embodiment of a compressor and an air conditioning system with an early exhaust function provided by the present disclosure; and

FIG. 3 is a schematic structural diagram of an air conditioning system according to an embodiment of a compressor with an early exhaust function and an air conditioning system provided by the present disclosure.

detailed description

In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the following further describes the present disclosure in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, but not used to limit the present disclosure.

The compressor as shown in Figures 1 and 2 includes a housing 1, and a suction cavity 2, a rotor cavity 3, and a discharge cavity 4 are formed in the housing 1 in order to communicate with each other. The exhaust cavity 4 is connected to form an exhaust passage, and an intermediate exhaust hole 34 is opened on the peripheral side of the rotor cavity 3, and a bypass passage 5 is formed between the intermediate exhaust hole 34 and the exhaust cavity 4, Compare the intermediate pressure Pm in the rotor cavity 3 with the condensing pressure Pe. When the intermediate pressure Pm is greater than the condensing pressure Pe, it indicates that the compressor is in an over-compressed state at this time. The intermediate pressure Pm is used directly for exhaust, which can effectively relieve the compressor The problem of compression, thereby reducing the useless work and energy consumption of the compressor.

The compressor is a positive displacement compressor. As the rotor rotates, the refrigerant is gradually compressed, so that the pressure of the refrigerant rises correspondingly. The rotor cavity 3 extends from the suction cavity 2 to the discharge cavity 4. The direction is divided into a low pressure suction pressure zone 31, an intermediate pressure zone 32, and an exhaust high pressure zone 33, and the pressure of the low pressure suction pressure zone 31 is less than the pressure Pm of the intermediate pressure zone 32, and the intermediate pressure zone 32 The pressure Pm is less than the pressure Pd of the exhaust high pressure zone 33, and the intermediate exhaust hole 34 is provided at the intermediate pressure zone 32.

A rotor is arranged in the rotor cavity 3, and tooth grooves are opened on the circumferential side of the rotor. One end of the tooth groove is connected to the low pressure suction pressure zone 31, and the other end is connected to the exhaust high pressure zone 33, The middle vent 34 is connected to the inside of the tooth groove.

A one-way valve is provided in the bypass passage 5, and the flow direction of the one-way valve is directed from the intermediate pressure zone 32 to the exhaust chamber 4 to prevent the pressure Pe in the exhaust chamber 4 from being greater than the intermediate pressure zone 32 The pressure Pm causes the problem of refrigerant reflux.

The check valve is a plunger check valve or a gate check valve.

In order to avoid frequent communication of the bypass passage 5, a pressure control valve is provided in the bypass passage 5. The first pressure inlet of the control valve is in communication with the intermediate pressure zone 32, and the second pressure inlet is connected with the exhaust gas. The chamber 4 is in communication, and when the pressure in the intermediate pressure zone 32 is greater than the pressure in the exhaust chamber 4, the pressure control valve controls the bypass passage 5 to open.

The pressure control valve includes a piston 6, an escape groove is provided in the bypass passage 5, the piston 6 is provided in the bypass passage 5, and one side of the piston 6 forms the first pressure inlet , The second pressure inlet is formed on the other side. When the pressure of the first pressure inlet is greater than the pressure of the second pressure inlet, the piston 6 slides into the escape groove and the first pressure inlet In communication with the second pressure inlet, when the pressure of the first pressure inlet is less than or equal to the pressure of the second pressure inlet, the piston 6 escapes from the escape groove and causes the first pressure inlet and the The second pressure inlet is disconnected, that is, the piston 6 slides according to the pressure difference (condensing pressure Pe of the exhaust cavity-the intermediate pressure Pm of the intermediate pressure zone) on both sides of the piston, thereby realizing automatic control.

The pressure control valve further includes an elastic member, the elastic member is arranged in the escape groove, and when the piston 6 slides into the escape groove, the elastic member is in a compressed state, and the elastic member is used to make the piston 6 can be reset to ensure the reliability of piston 6.

The elastic member is a spring.

The number of the intermediate exhaust holes 34 is multiple, and all the intermediate exhaust holes 34 are distributed on the intermediate pressure zone 32 along the direction from the low pressure suction pressure zone 31 to the exhaust high pressure zone 33, And each of the middle exhaust holes 34 and the exhaust cavity 4 form a bypass passage 5, wherein each of the middle exhaust holes 34 has an intermediate pressure Pm value, and With the compression of the refrigerant, the value of the intermediate pressure Pm increases from the low pressure suction pressure zone 31 to the exhaust high pressure zone 33. During use, the condensation pressure Pe in the exhaust chamber 4 is consistent with all intermediate pressures. The pressure Pm value is compared. When the condensing pressure Pe is greater than the value of all intermediate pressures Pm, the compressor is in a normal compression state at this time, and all the intermediate exhaust holes 34 are in a closed state, and when the condensing pressure Pe is less than one or more of them A value of intermediate pressure Pm indicates that the compressor is in an over-compression state. Under the control of the pressure difference, the intermediate exhaust hole 34 corresponding to the minimum intermediate pressure Pm is connected to the bypass channel 5 to achieve intermediate Exhaust, thereby solving the compressor's over-compression state.

An air conditioning system as shown in Figure 3 includes the above-mentioned compressor, condenser 7 and evaporator 8. The compressor, the condenser 7 and the evaporator 8 are connected in sequence to form a heat exchange cycle. The condenser 7 communicates with the exhaust cavity, and the evaporator 8 communicates with the suction cavity.

In the compressor and air conditioning system with pre-exhaust function provided in the present disclosure, an intermediate exhaust hole is provided on the circumference of the rotor cavity, and the intermediate pressure in the rotor cavity is compared with the condensation pressure. When the intermediate pressure is already greater than the condensation pressure, The intermediate pressure exhaust is directly used, and the exhaust is performed according to the condensing pressure demand, which effectively alleviates the problem of compressor overcompression, thereby reducing the useless work and energy consumption of the compressor.

The above-mentioned embodiments only express several implementation manners of the present disclosure, and their description is relatively specific and detailed, but they should not be understood as a limitation to the scope of the present disclosure. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can be made, and these all fall within the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure should be subject to the appended claims.

Claims

A compressor includes a casing (1). A suction cavity (2), a rotor cavity (3), and an exhaust cavity (4) are formed in the casing (1) in sequence, and the rotor cavity (3) ) Is connected to the exhaust cavity (4) to form an exhaust passage, and the rotor cavity (3) is provided with an intermediate exhaust hole (34) on the peripheral side, and the intermediate exhaust hole (34) is connected to the A bypass passage (5) is formed between the exhaust cavities (4).
The compressor according to claim 1, wherein the rotor cavity (3) is divided into a low-pressure suction pressure zone (31), a low-pressure suction pressure zone (31), and a low-pressure suction pressure zone (31) along the direction from the suction cavity (2) to the discharge cavity (4). The intermediate pressure zone (32) and the exhaust high pressure zone (33), and the pressure of the low-pressure suction pressure zone (31) is less than the pressure of the intermediate pressure zone (32), and the pressure of the intermediate pressure zone (32) Less than the pressure of the exhaust high pressure zone (33), the intermediate exhaust hole (34) is arranged at the intermediate pressure zone (32).
The compressor according to claim 2, wherein a rotor is arranged in the rotor cavity (3), and a tooth groove is opened on the circumferential side of the rotor, and one end of the tooth groove is connected to the low-pressure suction pressure zone (31). ) Connection, the other end is connected to the exhaust high pressure zone (33), and the middle exhaust hole (34) is connected to the inside of the tooth groove.
The compressor according to claim 2, wherein a one-way valve is provided in the bypass passage (5), and the flow direction of the one-way valve is from the intermediate pressure zone (32) to the exhaust chamber ( 4).
The compressor of claim 4, wherein the check valve is a plunger check valve or a gate check valve.
The compressor according to claim 2, wherein a pressure control valve is provided in the bypass passage (5), the first pressure inlet of the control valve is in communication with the intermediate pressure zone (32), and the second pressure inlet Connected with the exhaust chamber (4), and when the pressure in the intermediate pressure zone (32) is greater than the pressure in the exhaust chamber (4), the pressure control valve controls the bypass passage (5) ) Is turned on.
The compressor according to claim 6, wherein the pressure control valve comprises a piston (6), an escape groove is provided in the bypass passage (5), and the piston (6) is provided in the bypass passage ( 5), and one side of the piston (6) forms the first pressure inlet, and the other side forms the second pressure inlet. When the pressure of the first pressure inlet is greater than that of the second pressure inlet Under pressure, the piston (6) slides into the escape groove and the first pressure inlet is in communication with the second pressure inlet. When the pressure of the first pressure inlet is less than or equal to that of the second pressure inlet When pressure is applied, the piston (6) escapes the escape groove and disconnects the first pressure inlet and the second pressure inlet.
The compressor according to claim 7, wherein the pressure control valve further comprises an elastic member, the elastic member is arranged in the escape groove, and when the piston (6) slides into the escape groove, The elastic member is in a compressed state.
The compressor according to claim 8, wherein the elastic member is a spring.
The compressor according to claim 2, wherein the number of the intermediate exhaust holes (34) is multiple, and all the intermediate exhaust holes (34) extend along the low-pressure suction pressure zone (31) to the The direction of the exhaust high pressure zone (33) is distributed on the intermediate pressure zone (32), and each of the intermediate exhaust holes (34) and the exhaust cavity (4) form a side Pass channel (5).
An air conditioning system, comprising the compressor according to any one of claims 1 to 10.