Compressor and refrigeration device

1. A compressor comprising:

a sealing container;

a motor portion and a compressing mechanism portion, both provided in the sealing container; and

a bypass valve;

wherein the compressor comprises an exhaust side and a suction side spaced apart from each other, the exhaust side is connected to the bypass valve, and the exhaust side is configured to exhaust air to external parts through the bypass valve or communicate with the suction side through the bypass valve,

wherein the bypass valve comprises

a valve body defining a valve cavity, the valve body comprising a plurality of ports in communication with the valve cavity, and the plurality of ports being configured to be connected to the exhaust side, the suction side and the external parts respectively; and

a valve core movably provided in the valve body and having at least one flow passage, the plurality of ports being selectively communicated with one another through the at least one flow passage, and

wherein:

the plurality of ports comprise a first port, a second port and a third port;

the first port is selectively communicated with only one of the second port and the third port;

the first port is communicated with the exhaust side;

the third port is communicated with the suction side; and

the exhaust side is configured to exhaust air to the external parts through the second port,

wherein:

the bypass valve has a first state, a second state and a third state; and

in the first state, the exhaust side is communicated with the external parts through the bypass valve and disconnected from the suction side, in the second state, the exhaust side is disconnected from the external parts and communicated with the suction side through the bypass valve, and in the third state, the exhaust side is disconnected from the external parts and the suction side, and

wherein:

the compressor is configured, such that the bypass valve is switched from the first state to the second state when the motor portion is stopped from an operating state;

the compressor is configured, such that the bypass valve is switched from the second state to the third state when the motor portion is started from a stopped state; and

when P1 is greater than or equal to P2, the bypass valve is switched to the first state, and when the P1 is less than the P2, the bypass valve remains in the third state when the motor portion is not stopped, and is switched to the second state when the motor portion is stopped, wherein the P1 is a pressure at a first port, and the P2 is a pressure at a second port.

2. The compressor according to claim 1 , wherein the bypass valve further comprises an electromagnetic control portion electromagnetically connected to the valve core.

3. The compressor according to claim 1 , wherein:

at least part of the valve core is movably provided in the valve body in an axial direction of the valve body;

the first port is provided at a first end portion of the axial direction of the valve body;

the second port is provided at a first side surface of the valve body;

the third port is provided at a second side surface of the valve body;

the flow passage has a first open end facing the first end portion, a second open end facing the first side surface, and a third open end facing the second side surface; and

the first port is communicated with the second port when the second open end is opposite to the second port and the first port is communicated with the third port when the third open end is opposite to the third port.

4. The compressor according to claim 1 , wherein:

the plurality of ports comprise a first port, a second port, a third port and a fourth port;

the first port is selectively communicated with one of the second port and the third port;

the fourth port is selectively communicated with the third port;

the first port is communicated with the exhaust side;

the third port is communicated with the suction side; and

when the first port is communicated with the second port and the third port is communicated with the fourth port, the exhaust side is configured to exhaust air to the external parts through the second port and the suction side is configured to suck air to the external parts through the fourth port.

5. The compressor according to claim 1 , wherein:

the bypass valve comprises a first state and a second state;

in the first state, the exhaust side is communicated with the external parts through the bypass valve, and in a second state, the exhaust side is communicated with the suction side through the bypass valve; and

the compressor is configured, such that the bypass valve is switched from the first state to the second state when the motor portion is stopped from an operating state and such that the bypass valve is switched from the second state to the first state when the motor portion is started from a stopped state.

6. The compressor according to claim 1 , wherein:

the compressor is configured, such that the bypass valve is switched from the first state to the second state when the motor portion is stopped from the operating state; and

the compressor is configured, such that the bypass valve is switched from the second state to the third state when the motor portion is started from the stopped state, and after remaining in the third state for a preset time t, the bypass valve is switched to the first state when the motor portion is not stopped, and to the second state when the motor portion is stopped.

7. The compressor according to claim 1 ,

further comprising: a reservoir having an outlet communicated with an air inlet of the compressing mechanism portion, and an air suction pipe provided at the reservoir;

wherein the suction side of the compressor comprises the reservoir and the air suction pipe; and

wherein the sealing container defines a high-pressure containing cavity, an exhaust pipe is provided at the sealing container, and the exhaust side of the compressor comprises the high-pressure containing cavity and the exhaust pipe.

8. The compressor according to claim 1 , wherein:

the sealing container defines a low-pressure first cavity and a high-pressure second cavity, and is provided with an air suction pipe in communication with the low-pressure first cavity and an exhaust pipe in communication with the high-pressure second cavity; and

the suction side of the compressor comprises the low-pressure first cavity and the air suction pipe, and the exhaust side of the compressor comprises the high-pressure second cavity and the exhaust pipe.

9. A refrigeration device comprising:

a first heat exchanger,

a throttle valve,

a second heat exchanger, and

the compressor according to claim 1 ,

wherein:

a first connector of the first heat exchanger is connected to the bypass valve,

the throttle valve is connected between a second connector of the first heat exchanger and a first connector of the second heat exchanger, and

a second connector of the second heat exchanger is connected to an air suction port of the compressor.

10. A refrigeration device comprising:

a reversing device,

a first heat exchanger,

a throttle valve,

a second heat exchanger, and

the compressor according to claim 1 ,

wherein:

the reversing device comprises a first opening, a second opening, a third opening and a fourth opening; and

the first opening is connected to the bypass valve, the second opening is connected to a first connector of the first heat exchanger, the throttle valve is connected between a second connector of the first heat exchanger and a first connector of the second heat exchanger, a second connector of the second heat exchanger is connected to the fourth opening, and the third opening is connected to an air suction port of the compressor.

11. The compressor according to claim 4 , wherein:

the at least one flow passage of the valve core comprises a first flow passage, a second flow passage and a third flow passage; and

the first port and the second port are configured to communicate with each other through the first flow passage and the third port and the fourth port are configured to communicate with each other through the second flow passage, or the first port and third port are configured to communicate with each other through the third flow passage.

12. The compressor according to claim 11 , wherein:

at least part of the valve core is movably provided in the valve body in an axial direction of the valve body;

the first port and the third port are provided at a first side surface of the valve body and spaced apart in the axial direction;

the second port and the fourth port are provided at a second side surface of the valve body and spaced apart in the axial direction;

two open ends of the first flow passage and two open ends of the second flow passage face the first side surface and the second side surface of the valve body respectively; and

two open ends of the third flow passage face the first side surface of the valve body.

13. The compressor according to claim 12 , wherein the first flow passage and the second flow passage are spaced apart in the axial direction of the valve core, and a width of the second flow passage in the axial direction of the valve core is greater than a width of the first flow passage in the axial direction of the valve core.

14. The compressor according to claim 6 , wherein the preset time t is greater than or equal to 1 second and less than or equal to 10 seconds.