CN110762008A

CN110762008A - Compressor and refrigerating device

Info

Publication number: CN110762008A
Application number: CN201810827208.9A
Authority: CN
Inventors: 高斌
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2018-07-25
Filing date: 2018-07-25
Publication date: 2020-02-07

Abstract

The invention discloses a compressor and a refrigerating device, wherein the compressor comprises: sealing the container; a motor portion and a compression mechanism portion, both disposed within the sealed container; a bypass valve including a first port, a second port, a third port, the first port selectively communicable with one of the second port, the third port; wherein the compressor has a discharge side and a suction side separated, the first port communicating with the discharge side, the third port communicating with the suction side, the discharge side adapted to discharge air to external components through the second port. The compressor can realize quick restart of the compressor, can utilize residual heat after the compressor is stopped, and has high energy efficiency.

Description

Compressor and refrigerating device

Technical Field

The invention belongs to the technical field of compressor manufacturing, and particularly relates to a compressor and a refrigerating device with the same.

Background

In the refrigerating device, the refrigerant is converted between low temperature and low pressure and high temperature and high pressure by the compression of the compressor and the throttling action of the throttling structure, and the heat exchanger is utilized to realize the heat exchange with the surrounding environment, thereby realizing the effect of refrigeration or heating. Among them, the compressor is one of the most important parts in the refrigeration device, and the design of the compressor has an important influence on the energy efficiency and the operational reliability of the refrigeration device.

When the compressor is stopped from the last operation to the restart, the pressure is appliedThe pressure difference between the suction side and the discharge side of the compressor must be within a certain range in order to be able to restart, in particular for a rolling rotor compressor, which must reach a small value, for example 1kgf/cm²Otherwise, the compressor cannot be started again, so that the quick starting function cannot be realized.

On the other hand, in the related art, after the compressor is stopped, the refrigerant in the high-pressure side heat exchanger may rapidly return to the low-pressure side through the gaps between the compressor components, thereby increasing the temperature and pressure in the low-pressure side heat exchanger, in this case, the heat in the high-pressure side heat exchanger may be wasted, the cooling capacity in the low-pressure side heat exchanger may be lost, and the operation efficiency of the refrigeration apparatus may be adversely affected.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

The compressor according to the embodiment of the present invention includes: sealing the container; a motor portion and a compression mechanism portion, both disposed within the sealed container; a bypass valve including a first port, a second port, a third port, the first port selectively communicable with one of the second port, the third port; wherein the compressor has a discharge side and a suction side separated, the first port communicating with the discharge side, the third port communicating with the suction side, the discharge side adapted to discharge air to external components through the second port.

According to the compressor provided by the embodiment of the invention, the compressor can be quickly restarted, residual heat can be utilized after the compressor is stopped, and the energy efficiency is high.

According to a compressor of an embodiment of the present invention, the bypass valve includes: the valve body limits a valve cavity, and the first port, the second port and the third port are all arranged on the valve body and are all communicated with the valve cavity; the valve core is movably arranged in the valve body and provided with a flow passage, the flow passage is communicated with the first port, and the flow passage can be selectively communicated with the second port and the third port.

According to the compressor of one embodiment of the invention, at least part of the valve core is movably arranged in the valve body along the axial direction of the valve body, the first port is arranged at the first end part of the valve body in the axial direction, the second port is arranged at the first side surface of the valve body, the third port is arranged at the second side surface of the valve body, and the flow passage is provided with a first open end facing to the first end part, a second open end facing to the first side surface and a third open end facing to the second side surface; wherein the first port is in communication with the second port when the second open end is opposite the second port; the first port communicates with the third port when the third open end is opposite the third port.

According to a compressor of an embodiment of the present invention, the bypass valve further includes: and the electromagnetic control part is electromagnetically connected with the valve core.

According to a compressor of one embodiment of the present invention, the bypass valve has a first state in which the first port is in communication with the second port and the first port is disconnected from the third port, and a second state in which the first port is in communication with the third port and the first port is disconnected from the second port; the compressor is configured such that the bypass valve switches from a first state to a second state when the motor section is shut down from an operating state; the compressor is configured such that the bypass valve switches from the second state to the first state when the motor portion is started from a stopped state.

According to a compressor of one embodiment of the present invention, the bypass valve has a first state in which the first port is in communication with the second port and the first port is disconnected from the third port, a second state in which the first port is in communication with the third port and the first port is disconnected from the second port, and a third state in which the first port is disconnected from the second port and the first port is disconnected from the third port.

A compressor according to an embodiment of the present invention, the compressor being configured such that the bypass valve is switched from a first state to a second state when the motor portion is stopped from an operating state; the compressor is set to be switched from the second state to the third state when the motor part is started from a stop state, the bypass valve is switched to the first state when P1 is larger than or equal to P2, the bypass valve keeps the third state if the motor part is not stopped when P1 is smaller than P2, and the bypass valve is switched to the second state if the motor part is stopped; wherein P1 is the pressure at the first port and P2 is the pressure at the second port.

A compressor according to an embodiment of the present invention, the compressor being configured such that the bypass valve is switched from a first state to a second state when the motor portion is stopped from an operating state; the compressor is set to be switched from the second state to the third state when the motor part is started from a stop state, and after a preset time t is kept, the bypass valve is switched to the first state if the motor part is not stopped, and the bypass valve is switched to the second state if the motor part is stopped.

According to the compressor of one embodiment of the invention, the following requirements are met: t is more than or equal to 1 second and less than or equal to 10 seconds.

According to the compressor of one embodiment of the invention, the following requirements are met: t is more than or equal to 2 seconds and less than or equal to 6 seconds.

The compressor according to an embodiment of the present invention further includes: an outlet of the liquid reservoir is communicated with an air inlet of the compression mechanism part, an air suction pipe is arranged on the liquid reservoir, and the air suction side comprises the liquid reservoir and the air suction pipe; the sealed container limits a containing cavity of high pressure, the sealed container is provided with an exhaust pipe, and the exhaust side comprises the containing cavity and the exhaust pipe.

According to the compressor provided by the embodiment of the invention, the sealed container defines a low-pressure first cavity and a high-pressure second cavity, the sealed container is provided with the air suction pipe communicated with the first cavity, the sealed container is provided with the air exhaust pipe communicated with the second cavity, the air suction side comprises the first cavity and the air suction pipe, and the air exhaust side comprises the second cavity and the air exhaust pipe.

The invention also proposes a refrigeration device comprising: the compressor comprises a first heat exchanger, a throttling valve, a second heat exchanger and the compressor, wherein a first interface of the first heat exchanger is connected with a second port, the throttling valve is connected between a second interface of the first heat exchanger and a first interface of the second heat exchanger, and a second interface of the second heat exchanger is connected with an air suction port of the compressor.

The invention also proposes a refrigeration device comprising: the reversing device comprises a first port, a second port, a third port and a fourth port, the first port is connected with the second port, the second port is connected with the first interface of the first heat exchanger, the throttling valve is connected between the second interface of the first heat exchanger and the first interface of the second heat exchanger, the second interface of the second heat exchanger is connected with the fourth port, and the third port is connected with an air suction port of the compressor.

The refrigeration device has the same advantages of the compressor compared with the prior art, and the description is omitted.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 to 5 are schematic structural views of a refrigerating apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a bypass valve according to an embodiment of the present invention in a first state;

FIG. 7 is a schematic structural view of a bypass valve according to an embodiment of the present invention in a second state;

FIG. 8 is a schematic structural view of a bypass valve according to an embodiment of the present invention in a third state.

Reference numerals:

the air conditioner includes a compressor 1, a hermetic container 11, an exhaust pipe 12, an exhaust side pipe 12a, an intake pipe 13, an intake side pipe 13a, a first heat exchanger 2, a second heat exchanger 3, a throttle valve 4, a reversing device 5, a first port 5a, a second port 5b, a third port 5c, a fourth port 5d, a bypass valve 6, a first port 6a, a second port 6b, a third port 6c, a valve body 6d, a valve body 6e, a flow passage 6f, and an electromagnetic control portion 6 g.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A compressor 1 according to an embodiment of the present invention is described below with reference to fig. 1 to 8.

As shown in fig. 1 to 8, a compressor 1 according to an embodiment of the present invention includes: a sealed container 11, a motor part, a compression mechanism part, and a bypass valve 6.

The compressor 1 is provided with an exhaust side and an exhaust side which are separated, the exhaust side is a high-pressure side, the exhaust side is a low-pressure side, the motor part and the compression mechanism part are both arranged in the sealed container 11, the motor part is used for driving the compression mechanism part to realize air suction and compressed exhaust, the bypass valve 6 comprises a first port 6a, a second port 6b and a third port 6c, the first port 6a can be selectively communicated with one of the second port 6b and the third port 6c, the first port 6a is communicated with the exhaust side of the compressor 1, the third port 6c is communicated with the intake side of the compressor 1, and the exhaust side is suitable for exhausting air to external parts through the second port 6 b. In other words, the compressor 1 is connected to the outside pipe through the second port 6b, and when the first port 6a is disconnected from the second port 6b, the discharge side of the compressor is disconnected from the outside pipe, and the heat remaining in the high-pressure side heat exchanger can be used continuously.

When the compressor 1 is normally started, the motor section is operated, the first port 6a and the second port 6b of the bypass valve 6 are communicated, the third port 6c of the bypass valve 6 is disconnected from the first port 6a, the third port 6c is disconnected from the first port 6a, the high-pressure gas output from the compressor 1 is output from the discharge side to the discharge side pipe 12a of the refrigeration apparatus through the first port 6a and the second port 6b, and the suction side of the compressor 1 is sucked through the suction side pipe 13 a.

When the compressor 1 stops operating, the motor portion does not operate, the first port 6a and the third port 6c of the bypass valve 6 communicate with each other, and the first port 6a and the second port 6b are disconnected from each other. That is, the bypass valve 6 communicates the discharge side and the suction side of the compressor 1, and disconnects the discharge side of the compressor 1 from other components of the refrigeration apparatus.

Thus, when the compressor 1 is stopped, the pressures on the discharge side and the suction side of the compressor 1 can be quickly balanced, facilitating quick restart of the compressor 1.

On the other hand, when the compressor 1 is stopped, the bypass valve 6 cuts off the communication between the exhaust side of the compressor 1 and the refrigerating device, the inside of the high-pressure side heat exchanger is kept in a higher pressure state, and the throttle valve 3 still has a certain flow under the action of pressure difference, so that the residual heat of the high-pressure side heat exchanger can still release heat, and the low-pressure side heat exchanger can still have the capacity of evaporation and heat absorption.

In the invention, after the compressor 1 is stopped, the bypass valve 6 disconnects the high-pressure side and the high-pressure side heat exchanger of the compressor and directly communicates the high-pressure side and the low-pressure side of the compressor, and the high-pressure side of the compressor has a small volume and the bypass valve 6 has a direct communication channel, so that the high-pressure side and the low-pressure side of the compressor 1 can quickly realize pressure balance, the requirement that the pressure difference is less than 1kgf/cm2 when the compressor is started is met, and the function of quickly restarting the compressor after the compressor is stopped is realized. The pressure balance time obtained by the inventor through a large number of experimental tests can meet the requirement of pressure balance within 1 minute at the fastest speed according to the size of the bypass channel of the bypass valve 6.

As can be seen from the above description, the compressor 1 according to the embodiment of the present invention can simultaneously achieve the dual effects of waste heat utilization and rapid pressure balance of the system by adding the bypass valve 6, is particularly suitable for the occasions where the starting pressure difference is sensitive, the starting torque is large, and the requirement for rapid restart is met, is particularly effective for the application of the rotor compressor, and has the advantages of low cost, wide application range, and simple and reliable control.

According to the compressor 1 provided by the embodiment of the invention, the compressor 1 can be rapidly restarted, residual heat can be utilized after the compressor 1 is stopped, and the energy efficiency is high.

The structure of the bypass valve 6 of the embodiment of the invention is described below with reference to fig. 6 to 8.

As shown in fig. 6 to 8, the bypass valve 6 includes: a valve body 6d, a valve core 6e and an electromagnetic control part 6 g.

The valve body 6d defines a valve cavity, the first port 6a, the second port 6b and the third port 6c are all arranged on the valve body 6d, the first port 6a, the second port 6b and the third port 6c are all communicated with the valve cavity, the valve core 6e is movably arranged in the valve body 6d, the valve core 6e is provided with a flow passage 6f, the flow passage 6f is always communicated with the first port 6a, and the flow passage 6f is selectively communicated with the second port 6b and the third port 6 c. When the flow passage 6f communicates with the second port 6b, the first port 6a communicates with the second port 6 b; when the flow path 6f communicates with the third port 6c, the first port 6a and the third port 6c communicate with each other.

The valve element 6e is at least partially movably arranged in the valve body 6d in the axial direction of the valve body 6d, the first port 6a is arranged at a first end (i.e. the left end in fig. 6-8) in the axial direction of the valve body 6d, the second port 6b is arranged at a first side (i.e. the upper side in fig. 6-8) of the valve body 6d, the third port 6c is arranged at a second side (i.e. the lower side in fig. 6-8) of the valve body 6d, the flow passage 6f has a first open end facing the first end, a second open end facing the first side, a third open end facing the second side, in some embodiments, the flow passage 6f comprises a first section extending in the axial direction of the valve body 6d and a second section extending in the radial direction of the valve body 6d, the first section may be of a blind hole type, the second section is of a through hole type, the open end of the first section is formed as the first end, and the two ends of the, and when the spool 6e is in the position shown in fig. 6, the second open end and the third open end are respectively opposed to the second port 6b and the third port 6 c. The first port 6a communicates with the second port 6b when the second open end is opposed to the second port 6 b; the first port 6a communicates with the third port 6c when the third open end is opposite to the third port 6 c.

The electromagnetic control portion 6g is electromagnetically connected to the valve core 6e, the valve core 6e may include a control rod extending from a second end (i.e., a right end in fig. 6-8) of the valve body 6d in the axial direction, the electromagnetic control portion 6g is sleeved outside the control rod, the control rod is made of a ferromagnetic material, and when the electromagnetic control portion 6g is energized, the control rod may move in the axial direction. The electromagnetic control unit 6g is electrically connected to the motor unit, that is, the electromagnetic control unit 6g can be controlled by an electric signal from the motor unit.

In some embodiments, the bypass valve 6 has a first state and a second state: as shown in fig. 6, in the first state, the first port 6a communicates with the second port 6b, and the first port 6a is disconnected from the third port 6 c; as shown in fig. 7, in the second state, the first port 6a and the third port 6c are connected, and the first port 6a and the second port 6b are disconnected. The compressor 1 is arranged such that the bypass valve 6 switches from the first state to the second state when the motor part is stopped from the running state; the compressor 1 is arranged such that the bypass valve 6 switches from the second state to the first state when the motor part is started from the stopped state. That is, when the compressor 1 is started, the bypass valve 6 is automatically switched to the first state to facilitate the outward discharge of the compressor 1, and when the compressor 1 is stopped, the bypass valve 6 is automatically switched to the second state to facilitate the rapid balance of the pressures on the discharge side and the suction side of the compressor 1, thereby facilitating the rapid start of the compressor next time.

In other embodiments, the bypass valve 6 has a first state, a second state, and a third state: as shown in fig. 6, in the first state, the first port 6a communicates with the second port 6b, and the first port 6a is disconnected from the third port 6 c; as shown in fig. 7, in the second state, the first port 6a communicates with the third port 6c, and the first port 6a is disconnected from the second port 6 b; as shown in fig. 8, in the third state, the first port 6a is disconnected from the second port 6b, and the first port 6a is disconnected from the third port 6 c. The compressor 1 is arranged such that the bypass valve 6 switches from the first state to the second state when the motor part is stopped from the running state; the compressor 1 is set to switch the bypass valve 6 from the second state to the third state when the motor part is started from the stop state, and switch the bypass valve 6 to the first state when P1 is more than or equal to P2, when P1 < P2, the bypass valve 6 keeps the third state if the motor part is not stopped, and switch the bypass valve 6 to the second state if the motor part is stopped; where P1 is the pressure at the first port 6a and P2 is the pressure at the second port 6 b. In the present embodiment, since the pressure control signal is increased, the electric signal of the electromagnetic control unit 6g of the bypass valve 6 may be connected to the control signal of the motor unit, or may be controlled by providing a control unit independently.

In still other embodiments, the bypass valve 6 has a first state, a second state, and a third state: as shown in fig. 6, in the first state, the first port 6a communicates with the second port 6b and the first port 6a is disconnected from the third port 6c, and as shown in fig. 7, in the second state, the first port 6a communicates with the third port 6c and the first port 6a is disconnected from the second port 6 b; as shown in fig. 8, in the third state, the first port 6a is disconnected from the second port 6b, and the first port 6a is disconnected from the third port 6 c. The compressor 1 is arranged such that the bypass valve 6 switches from the first state to the second state when the motor part is stopped from the running state; the compressor 1 is arranged such that when the motor part is started from a stopped state, the bypass valve 6 is switched from the second state to the third state and after a preset time t, the bypass valve 6 is switched to the first state if the motor part is not stopped, and the bypass valve 6 is switched to the second state if the motor part is stopped, wherein: t is more than or equal to 1 second and less than or equal to 10 seconds, or satisfies the following conditions: t is more than or equal to 2 seconds and less than or equal to 6 seconds.

The structures of two types of compressors 1 according to the embodiment of the present invention are described below with reference to fig. 2 to 4.

As shown in fig. 2 and 3, in some embodiments, the compressor 1 further comprises: the outlet of the liquid accumulator is communicated with the air inlet of the compression mechanism part, the liquid accumulator is provided with an air suction pipe 13, and the air suction side comprises the liquid accumulator and the air suction pipe 13; the sealed container 11 defines a high-pressure containing cavity, the sealed container 11 is provided with an exhaust pipe 12, and the exhaust side comprises the containing cavity and the exhaust pipe 12.

That is, the sealed container 11 encloses a high-pressure internal space, the sealed container 11 is provided with an exhaust pipe 12 communicating with the high-pressure internal space, the internal space of the sealed container 11 and the exhaust pipe 12 together constitute the high-pressure side of the compressor 1, and the motor portion and the compression mechanism portion are disposed in the high-pressure internal space of the sealed container 11; the accumulator is arranged outside the sealed container 11, an outlet of the accumulator is communicated with an air inlet of the compressor 1, an air suction pipe 13 is arranged on the accumulator, the air suction pipe 13 is communicated with an air suction side pipeline 13a (low pressure pipeline) of the refrigerating device, and the accumulator and the air suction pipe 13 jointly form a low pressure side of the compressor 1.

The first port 6a of the bypass valve 6 communicates with the high pressure side of the compressor 1, the second port 6b of the bypass valve 6 communicates with the discharge side pipe line 12a (high pressure pipe line) of the refrigeration apparatus, and the third port 6c of the bypass valve 6 communicates with the suction side of the compressor 1 and the suction side pipe line 13a (low pressure pipe line) of the refrigeration apparatus.

In other embodiments, as shown in fig. 4, the sealed container 11 defines a first chamber with low pressure and a second chamber with high pressure, the sealed container 11 is provided with an air suction pipe 13 communicated with the first chamber, the sealed container 11 is provided with an air exhaust pipe 12 communicated with the second chamber, the air suction side comprises the first chamber and the air suction pipe 13, and the air exhaust side comprises the second chamber and the air exhaust pipe 12.

That is, the sealed container 11 encloses a low-pressure internal space, the sealed container 11 is provided with an air suction pipe 13 communicating with the low-pressure internal space, the air suction pipe 13 communicates with an air suction side pipe 13a (low-pressure pipe) of the refrigeration apparatus, and the low-pressure internal space and the air suction pipe 13 together constitute a low-pressure side of the compressor 1; the motor unit and the compression mechanism unit are disposed in the internal space of the low-pressure sealed container 11.

In particular, in some designs, the internal space of the hermetic container 11 is divided into two parts, i.e., a low-pressure internal space with a larger volume and a high-pressure internal space with a smaller volume, and one end of the compressor 1 mechanism is located in the low-pressure internal space and the other end is located in the high-pressure internal space, in this case, since the low-pressure internal space is larger, we still consider that the compressor 1 mechanism is located in the low-pressure internal space, and the compressor 1 is the compressor 1 with the low-pressure structure in the hermetic container 11.

The compressor 1 of the low-pressure structure in the sealed container 11 further has a high-pressure exhaust chamber and an exhaust pipe 12, the high-pressure exhaust chamber is used as a space for containing high-pressure gas compressed by the compressor 1 structure and is sealed and separated from the low-pressure internal space, and the exhaust pipe 12 is communicated with the high-pressure exhaust chamber. In practical design, the high-pressure exhaust chamber may be disposed in the inner space of the sealed container 11, and may also be disposed outside the sealed container 11. The high pressure discharge chamber and the discharge pipe 12 together constitute the high pressure side of the compressor 1.

A cooling apparatus according to an embodiment of the present invention, which may be an air conditioner, a refrigerator, or the like, is described below with reference to fig. 1 to 8.

As shown in fig. 5, a refrigerating apparatus according to an embodiment of the present invention includes: the compressor 1 is the compressor 1 of any one of the embodiments, the first port of the first heat exchanger 2 is connected to the second port 6b of the bypass valve 6, the first port of the first heat exchanger 2 is communicated with the second port 6b of the bypass valve 6 through the exhaust side pipeline 12a (high pressure pipeline), the throttle valve 4 is connected between the second port of the first heat exchanger 2 and the first port of the second heat exchanger 3, the second port of the second heat exchanger 3 is connected to the suction port of the compressor 1, the second port of the second heat exchanger 3 is communicated with the suction port of the compressor 1 through the suction side pipeline 13a (low pressure pipeline), and the suction port of the compressor 1 can be formed at the end of the suction pipe 13 of the compressor 1.

According to the refrigeration device provided by the embodiment of the invention, the quick restart can be realized, the residual heat can be utilized after the compressor 1 is stopped, and the energy efficiency is high.

As shown in fig. 1 to 4, a refrigerating apparatus according to another embodiment of the present invention includes: the heat exchanger comprises a compressor 1, a reversing device 5, a first heat exchanger 2, a throttle valve 4 and a second heat exchanger 3.

The reversing device 5 comprises a first port 5a, a second port 5b, a third port 5c and a fourth port 5d, the reversing device 5 can be a four-way valve, the first port 5a is connected with a second port 6b, the second port 5b is connected with a first interface of the first heat exchanger 2, the second port 5b is communicated with the first interface of the first heat exchanger 2 through an exhaust side pipeline 12a (high pressure pipeline), the throttle valve 4 is connected between a second interface of the first heat exchanger 2 and a first interface of the second heat exchanger 3, a second interface of the second heat exchanger 3 is connected with a fourth port 5d, the third port 5c is connected with an air suction port of the compressor 1, the third port 5c is communicated with the air suction port of the compressor 1 through an air suction side pipeline 13a (low pressure pipeline), and the air suction port of the compressor 1 can be formed at the end of an air suction pipe 13 of the compressor 1.

When the first port 5a is communicated with the second port 5b and the third port 5c is communicated with the fourth port 5d, the first heat exchanger 2 is a high-pressure side heat exchanger and the second heat exchanger 3 is a low-pressure side heat exchanger; when the first port 5a communicates with the fourth port 5d and the second port 5b communicates with the third port 5c, the second heat exchanger 3 is a high-pressure side heat exchanger and the first heat exchanger 2 is a low-pressure side heat exchanger.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A compressor, comprising:

sealing the container;

a motor portion and a compression mechanism portion, both disposed within the sealed container;

a bypass valve including a first port, a second port, a third port, the first port selectively communicable with one of the second port, the third port; wherein

The compressor has a separate discharge side and a suction side, the first port communicating with the discharge side, the third port communicating with the suction side, the discharge side adapted to discharge air to external components through the second port.

2. The compressor of claim 1, wherein the bypass valve comprises:

the valve body limits a valve cavity, and the first port, the second port and the third port are all arranged on the valve body and are all communicated with the valve cavity;

the valve core is movably arranged in the valve body and provided with a flow passage, the flow passage is communicated with the first port, and the flow passage can be selectively communicated with the second port and the third port.

3. The compressor of claim 2, wherein at least a portion of the valve element is movably disposed within the valve body in an axial direction of the valve body, the first port is disposed at a first axial end of the valve body, the second port is disposed at a first side of the valve body, the third port is disposed at a second side of the valve body, and the flow passage has a first open end facing the first end, a second open end facing the first side, and a third open end facing the second side; wherein the content of the first and second substances,

the first port communicates with the second port when the second open end is opposite the second port; the first port communicates with the third port when the third open end is opposite the third port.

4. The compressor of claim 2, wherein the bypass valve further comprises: and the electromagnetic control part is electromagnetically connected with the valve core.

5. The compressor of claim 1, wherein the bypass valve has a first state in which the first port is in communication with the second port and the first port is disconnected from the third port, and a second state in which the first port is in communication with the third port and the first port is disconnected from the second port;

the compressor is configured such that the bypass valve switches from a first state to a second state when the motor section is shut down from an operating state; the compressor is configured such that the bypass valve switches from the second state to the first state when the motor portion is started from a stopped state.

6. The compressor of claim 1, wherein the bypass valve has a first state in which the first port is in communication with the second port and the first port is disconnected from the third port, a second state in which the first port is in communication with the third port and the first port is disconnected from the second port, and a third state in which the first port is disconnected from the second port and the first port is disconnected from the third port.

7. The compressor of claim 6, wherein the compressor is configured such that the bypass valve switches from a first state to a second state when the motor section is shut down from an operating state; the compressor is set to be switched from the second state to the third state when the motor part is started from a stop state, the bypass valve is switched to the first state when P1 is larger than or equal to P2, the bypass valve keeps the third state if the motor part is not stopped when P1 is smaller than P2, and the bypass valve is switched to the second state if the motor part is stopped; wherein the content of the first and second substances,

p1 is the pressure at the first port and P2 is the pressure at the second port.

8. The compressor of claim 6, wherein the compressor is configured such that the bypass valve switches from a first state to a second state when the motor section is shut down from an operating state; the compressor is set to be switched from the second state to the third state when the motor part is started from a stop state, and after a preset time t is kept, the bypass valve is switched to the first state if the motor part is not stopped, and the bypass valve is switched to the second state if the motor part is stopped.

9. The compressor of claim 8, wherein the following is satisfied: t is more than or equal to 1 second and less than or equal to 10 seconds.

10. The compressor of claim 8, wherein the following is satisfied: t is more than or equal to 2 seconds and less than or equal to 6 seconds.

11. The compressor of any one of claims 1-10, further comprising: an outlet of the liquid reservoir is communicated with an air inlet of the compression mechanism part, an air suction pipe is arranged on the liquid reservoir, and the air suction side comprises the liquid reservoir and the air suction pipe;

the sealed container limits a containing cavity of high pressure, the sealed container is provided with an exhaust pipe, and the exhaust side comprises the containing cavity and the exhaust pipe.

12. The compressor of any one of claims 1 to 10, wherein the hermetic container defines a first chamber having a low pressure and a second chamber having a high pressure, the hermetic container is provided with a suction pipe communicating with the first chamber, the hermetic container is provided with a discharge pipe communicating with the second chamber, the suction side includes the first chamber and the suction pipe, and the discharge side includes the second chamber and the discharge pipe.

13. A refrigeration device, comprising: a first heat exchanger, a throttle valve, a second heat exchanger, a compressor as claimed in any one of claims 1 to 12, the first port of the first heat exchanger being connected to the second port, the throttle valve being connected between the second port of the first heat exchanger and the first port of the second heat exchanger, the second port of the second heat exchanger being connected to the suction port of the compressor.

14. A refrigeration device, comprising: a reversing device, a first heat exchanger, a throttle valve, a second heat exchanger, a compressor as claimed in any one of claims 1 to 12, the reversing device comprising a first port, a second port, a third port and a fourth port, the first port being connected to the second port, the second port being connected to the first port of the first heat exchanger, the throttle valve being connected between the second port of the first heat exchanger and the first port of the second heat exchanger, the second port of the second heat exchanger being connected to the fourth port, the third port being connected to the suction port of the compressor.