Compressor and refrigeration device

Abstract

The present invention discloses a compressor and a refrigeration device. The compressor includes: a sealed container; a motor part and a compression mechanism part, both the motor part and the compression mechanism part are arranged in the sealed container; a bypass valve, the bypass valve includes a first port, a second port, a third port, and a fourth port, the first port can be selectively communicated with one of the second port and the third port, and the fourth port can be selectively communicated with the third port; wherein the compressor has a separated exhaust side and suction side, the first port is communicated with the exhaust side, the third port is communicated with the suction side, when the first port is communicated with the second port and the third port is communicated with the fourth port, the exhaust side is adapted to exhaust to external components through the second port, and the suction side is adapted to suck from external components through the fourth port. The compressor of the present invention can achieve rapid restart of the compressor, and can also utilize the remaining heat after the compressor stops, with high energy efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressor manufacturing, and more particularly, relates to a compressor and a refrigeration device having the compressor. Background Art

[0002] In a refrigeration device, through the compression of the compressor and the throttling effect of the throttling structure, the refrigerant is thus converted between low temperature and low pressure and high temperature and high pressure, and heat exchange with the surrounding environment is achieved by using a heat exchanger to achieve the effect of refrigeration or heating. Among them, the compressor is one of the very important components in the refrigeration device, and the design of the compressor has an important impact on the energy efficiency and operation reliability of the refrigeration device.

[0003] When the compressor stops operating after the last run until it can be restarted, the pressure difference between the suction side and the discharge side of the compressor must reach a certain required range before it can be restarted. Especially for a rolling piston compressor, this pressure difference must reach a relatively small value, such as 1 kgf / cm 2 or less, otherwise the compressor cannot be restarted again, and thus the quick start function cannot be achieved.

[0004] On the other hand, in the related art, when the compressor stops operating, the refrigerant in the high-pressure side heat exchanger will quickly return to the low-pressure side through the gaps of 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 will be wasted and the refrigerating capacity in the low-pressure side heat exchanger will be lost, which is not conducive to the operation efficiency of the refrigeration device.

[0005] In a refrigeration device, through the compression of the compressor and the throttling effect of the throttling structure, the refrigerant is thus converted between low temperature and low pressure and high temperature and high pressure, and heat exchange with the surrounding environment is achieved by using a heat exchanger to achieve the effect of refrigeration or heating. Among them, the compressor is one of the very important components in the refrigeration device, and the design of the compressor has an important impact on the energy efficiency and operation reliability of the refrigeration device. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0007] A compressor according to an embodiment of the present invention includes: a sealed container; a motor part and a compression mechanism part, both the motor part and the compression mechanism part are arranged in the sealed container; a bypass valve, the bypass valve includes a first port, a second port, a third port, and a fourth port, the first port can be selectively communicated with one of the second port and the third port, and the fourth port can be selectively communicated with the third port; wherein the compressor has a separated exhaust side and suction side, the first port is communicated with the exhaust side, the third port is communicated with the suction side, when the first port is communicated with the second port and the third port is communicated with the fourth port, the exhaust side is adapted to exhaust to external components through the second port, and the suction side is adapted to suck from external components through the fourth port.

[0008] The compressor according to an embodiment of the present invention can achieve rapid restart of the compressor, and can also utilize the remaining heat after the compressor stops, with high energy efficiency.

[0009] In a compressor according to an embodiment of the present invention, the bypass valve includes: a valve body, the valve body defines a valve cavity, the first port, the second port, the third port, and the fourth port are all arranged on the valve body and are all communicated with the valve cavity; a valve core, the valve core is movably arranged in the valve body, the valve core has a first flow channel, a second flow channel, and a third flow channel, the first port and the second port are adapted to be communicated through the first flow channel and the third port and the fourth port are adapted to be communicated through the second flow channel, or the first port and the third port are adapted to be communicated through the third flow channel.

[0010] In a compressor according to an embodiment of the present invention, at least a part of the valve core is movably arranged in the valve body along the axial direction of the valve body, the first port and the third port are arranged on a first side surface of the valve body and are spaced apart along the axial direction, the second port and the fourth port are arranged on a second side surface of the valve body and are spaced apart along the axial direction, two open ends of the first flow channel and two open ends of the second flow channel respectively face the first side surface and the second side surface of the valve body, and two open ends of the third flow channel both face the first side surface of the valve body.

[0011] In a compressor according to an embodiment of the present invention, the first flow channel and the second flow channel are arranged spaced apart along the axial direction of the valve core, and the width of the second flow channel along the axial direction of the valve core is greater than the width of the first flow channel along the axial direction of the valve core.

[0012] In a compressor according to an embodiment of the present invention, the bypass valve further includes: an electromagnetic control part, the electromagnetic control part is electromagnetically connected with the valve core.

[0013] A compressor according to an embodiment of the present invention, the bypass valve has a first state and a second state. In the first state, the first port is in communication with the second port, and the fourth port is in communication with the third port. In the second state, the first port is in communication with the third port, the first port is disconnected from the second port, and the third port is disconnected from the fourth port; the compressor is arranged such that when the motor unit stops from the running state, the bypass valve switches from the first state to the second state; the compressor is arranged such that when the motor unit starts from the stopped state, the bypass valve switches from the second state to the first state.

[0014] A compressor according to an embodiment of the present invention, the bypass valve has a first state, a second state and a third state. In the first state, the first port is in communication with the second port, and the fourth port is in communication with the third port. In the second state, the first port is in communication with the third port, the first port is disconnected from the second port, and the third port is disconnected from the fourth port. In the third state, the first port is disconnected from the second port, and the fourth port is in communication with the third port.

[0015] A compressor according to an embodiment of the present invention, the compressor is arranged such that when the motor unit stops from the running state, the bypass valve switches from the first state to the second state; the compressor is arranged such that when the motor unit starts from the stopped state, the bypass valve switches from the second state to the third state, and when P1≥P2, the bypass valve switches to the first state. When P1<P2, if the motor unit is not stopped, the bypass valve remains in the third state, and if the motor unit is stopped, the bypass valve switches to the second state; wherein, P1 is the pressure at the first port, and P2 is the pressure at the second port.

[0016] A compressor according to an embodiment of the present invention, the compressor is arranged such that when the motor unit stops from the running state, the bypass valve switches from the first state to the second state; the compressor is arranged such that when the motor unit starts from the stopped state, the bypass valve switches from the second state to the third state, and after maintaining a preset time t, if the motor unit is not stopped, the bypass valve switches to the first state, and if the motor unit is stopped, the bypass valve switches to the second state.

[0017] A compressor according to an embodiment of the present invention, satisfying: 1 second ≤ t ≤ 10 seconds.

[0018] A compressor according to an embodiment of the present invention further includes: a liquid receiver, an outlet of the liquid receiver is communicated with an air inlet of the compression mechanism portion, an air suction pipe is provided on the liquid receiver, and the air suction side includes the liquid receiver and the air suction pipe; the sealed container defines a high-pressure accommodation cavity, an exhaust pipe is provided on the sealed container, and the exhaust side includes the accommodation cavity and the exhaust pipe.

[0019] For the compressor according to an embodiment of the present invention, the sealed container defines a low-pressure first cavity and a high-pressure second cavity, an air suction pipe communicated with the first cavity is provided on the sealed container, an exhaust pipe communicated with the second cavity is provided on the sealed container, the air suction side includes the first cavity and the air suction pipe, and the exhaust side includes the second cavity and the exhaust pipe.

[0020] The present invention also provides a refrigeration device, including: a first heat exchanger, a throttle valve, a second heat exchanger, and the compressor according to any one of the above. A first interface of the first heat exchanger is connected to the second port, the throttle 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 to the fourth port.

[0021] The present invention also provides a refrigeration device, including: a commutation device, a first heat exchanger, a throttle valve, a second heat exchanger, and the compressor according to any one of the above. The commutation device includes a first port, a second port, a third port, and a fourth port. The first port is connected to the second port, the second port is connected to a first interface of the first heat exchanger, the throttle valve is connected between a second interface of the first heat exchanger and a first interface of the second heat exchanger, a second interface of the second heat exchanger is connected to the fourth port, and the third port is connected to the fourth port.

[0022] The refrigeration device has the same advantages as the above-mentioned compressor compared with the prior art, and will not be elaborated herein.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figures 1 - 5 is a schematic structural diagram of a refrigeration device according to an embodiment of the present invention;

[0026] Figure 6 is a schematic structural diagram of a bypass valve in a first state according to an embodiment of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the bypass valve according to an embodiment of the present invention in the second state;

[0028] Figure 8 It is a schematic structural diagram of the bypass valve according to an embodiment of the present invention in the third state.

[0029] Reference numerals:

[0030] Compressor 1, sealed container 11, exhaust pipe 12, exhaust side pipeline 12a, suction pipe 13, suction side pipeline 13a, first heat exchanger 2, second heat exchanger 3, throttle valve 4, commutation device 5, first port 5a, second port 5b, third port 5c, fourth port 5d, bypass valve 6, first port 6a, second port 6b, third port 6c, valve body 6d, valve core 6e, electromagnetic control unit 6g, fourth port 6h, first flow channel 6i, second flow channel 6j, third flow channel 6k. Detailed implementation manners

[0031] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0033] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Reference is made below to Figures 1 - 8 describe the compressor 1 according to an embodiment of the present invention.

[0035] As Figures 1 - 8 shown, the 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.

[0036] Among them, the compressor 1 has a separated exhaust side and suction side. The exhaust side is the high-pressure side, and the suction side is the low-pressure side. Both the motor part and the compression mechanism part are arranged in the sealed container 11. The motor part is used to drive the compression mechanism part to achieve suction and compression of the exhaust gas. The bypass valve 6 includes a first port 6a, a second port 6b, a third port 6c, and a fourth port 6h. The first port 6a can be selectively communicated with one of the second port 6b and the third port 6c, and the fourth port 6h can be selectively communicated with the third port 6c. Among them, the first port 6a is communicated with the exhaust side of the compressor 1, and the third port 6c is communicated with the suction side of the compressor 1. When the first port 6a is communicated with the second port 6b and the third port 6c is communicated with the fourth port 6h, the exhaust side is adapted to exhaust to external components through the second port 6b, and the suction side is adapted to suck from external components through the fourth port 6h. In other words, the compressor is connected to the external pipeline through the second port 6b and the fourth port 6h. When the first port 6a is disconnected from the second port 6b, the exhaust side of the compressor is disconnected from the external pipeline, and the heat remaining in the high-pressure side heat exchanger can continue to be utilized.

[0037] When the compressor 1 starts and operates normally, the motor part works, the first port 6a of the bypass valve 6 is communicated with the second port 6b, and the third port 6c of the bypass valve 6 is communicated with the fourth port 6h. The high-pressure gas output by the compressor 1 is output from the exhaust side to the exhaust side pipeline 12a of the refrigeration device through the first port 6a and the second port 6b, and the suction side of the compressor 1 sucks in through the suction side pipeline 13a, the fourth port 6h, and the third port 6c.

[0038] When the compressor 1 stops running, the motor part does not work, the first port 6a of the bypass valve 6 is communicated with the third port 6c, the first port 6a is disconnected from the second port 6b, and the third port 6c is disconnected from the fourth port 6h. That is to say, the bypass valve 6 communicates the exhaust side of the compressor 1 with the suction side, and disconnects the exhaust side of the compressor 1 from other components of the refrigeration device.

[0039] In this way, when the compressor 1 stops, the pressure between the exhaust side and the suction side of the compressor 1 can be quickly balanced, which is convenient for quickly restarting the compressor 1.

[0040] On the other hand, when the compressor 1 stops, the bypass valve 6 cuts off the connection between the exhaust side of the compressor 1 and the refrigeration device, and the second port 6b cannot flow back to the first port 6a. The high-pressure side heat exchanger maintains a relatively high pressure state inside. The throttle valve 3 still has a certain flow rate under the action of the pressure difference, so that the remaining heat in the high-pressure side heat exchanger can still release heat, and the low-pressure side heat exchanger can still have the ability to absorb heat by evaporation. In this way, when the compressor 1 stops, the refrigeration device can still utilize the remaining heat in the heat exchanger, thereby improving the overall efficiency of the refrigeration device, enabling the utilization of the remaining heat of the system, and having the characteristics of simplicity, reliability, high efficiency and energy saving.

[0041] In the present invention, after the compressor 1 stops, the bypass valve 6 disconnects the high-pressure side of the compressor from the high-pressure side heat exchanger and directly connects it to the low-pressure side of the compressor. Since the volume of the high-pressure side of the compressor is small and the bypass valve 6 has a direct connection channel, in this case, the high-pressure side and the low-pressure side of the compressor 1 can quickly achieve pressure balance, meeting the requirement that the pressure difference at the start of the compressor is less than 1 kgf / cm2, so as to realize the function of quickly restarting the compressor after it stops. The pressure balance time obtained by the inventor through a large number of experimental tests can meet the requirement of achieving pressure balance within the fastest 1 minute according to the size of the bypass channel of the selected bypass valve 6.

[0042] As can be seen from the above description, for the compressor 1 of the embodiment of the present invention, by simply adding a bypass valve 6, the dual effects of waste heat utilization and rapid pressure balance of the system can be achieved simultaneously, which is particularly suitable for occasions that are sensitive to the starting pressure difference, have a large starting torque and have requirements for rapid restart. It is particularly effective for the application of rotary compressors, and has the advantages of low cost, wide application range, simple and reliable control.

[0043] According to the compressor 1 of the embodiment of the present invention, rapid restart of the compressor 1 can be achieved, and the remaining heat can still be utilized after the compressor 1 stops, with high energy efficiency.

[0044] Next, refer to Figures 6 - 8 Describe the structure of the bypass valve 6 of the embodiment of the present invention.

[0045] As Figures 6 - 8 shown, the bypass valve 6 includes: a valve body 6d, a valve core 6e and an electromagnetic control part 6g.

[0046] Among them, the valve body 6d defines a valve cavity. The first port 6a, the second port 6b, the third port 6c and the fourth port 6h are all arranged on the valve body 6d, and the first port 6a, the second port 6b, the third port 6c and the fourth port 6h are all communicated with the valve cavity.

[0047] The valve core 6e is movably arranged in the valve body 6d. The valve core 6e has a first flow channel 6i, a second flow channel 6j, and a third flow channel 6k. The first port 6a and the second port 6b are adapted to be communicated through the first flow channel 6i, and the third port 6c and the fourth port 6h are adapted to be communicated through the second flow channel 6j, or the first port 6a and the third port 6c are adapted to be communicated through the third flow channel 6k.

[0048] At least a part of the valve core 6e is movably arranged in the valve body 6d along the axial direction of the valve body 6d (i.e., Figures 6 - 8 the left - right direction in Figures 6 - 8 ). The first port 6a and the third port 6c are arranged on the first side surface of the valve body 6a (i.e., Figures 6 - 8 the lower side surface in

[0049] ), and the first port 6a and the third port 6c are arranged at intervals along the axial direction. The second port 6b and the fourth port 6h are arranged on the second side surface of the valve body 6a (i.e.,

[0050] the upper side surface in

[0051] ), and the second port 6b and the fourth port 6h are arranged at intervals along the axial direction. The first port 6a can be arranged opposite to the second port 6b, and the third port 6c can be arranged opposite to the fourth port 6h.

[0052] The electromagnetic control part 6g is electromagnetically connected to the valve core 6e. The valve core 6e may include a control rod extending from the second end (i.e., Figures 6 - 8 the right end in

[0053] ). The electromagnetic control part 6g is sleeved outside the control rod. The control rod is made of ferromagnetic material. When the electromagnetic control part 6g is powered on, the control rod can move along the axial direction. The electromagnetic control part 6g is electrically connected to the motor part. That is to say, the electromagnetic control part 6g can be controlled by the power - on signal of the motor part. Figure 6 In some embodiments, the bypass valve 6 has a first state and a second state: asAs shown, in the first state, the first port 6a is in communication with the second port 6b, and the fourth port 6h is in communication with the third port 6c; as Figure 7 shown, in the second state, the first port 6a is in communication with the third port 6c, the first port 6a is disconnected from the second port 6b, and the third port 6c is disconnected from the fourth port 6h. The compressor 1 is configured such that when the motor unit stops from the operating state, the bypass valve 6 switches from the first state to the second state; the compressor 1 is configured such that when the motor unit starts from the stopped state, the bypass valve 6 switches from the second state to the first state. That is to say, when the compressor 1 starts, the bypass valve 6 automatically switches to the first state, facilitating the exhaust and suction of the compressor 1. When the compressor 1 stops, the bypass valve 6 automatically switches to the second state, facilitating the rapid equalization of the pressures on the exhaust side and the suction side of the compressor 1, and facilitating rapid startup next time.

[0054] In some other embodiments, the bypass valve 6 has a first state, a second state, and a third state: as Figure 6 shown, in the first state, the first port 6a is in communication with the second port 6b, and the fourth port 6h is in communication with the third port 6c; as Figure 7 shown, in the second state, the first port 6a is in communication with the third port 6c, the first port 6a is disconnected from the second port 6b, and the third port 6c is disconnected from the fourth port 6h; as Figure 8 shown, in the third state, the first port 6a is disconnected from the second port 6b, and the fourth port 6h is in communication with the third port 6c. The compressor 1 is configured such that when the motor unit stops from the operating state, the bypass valve 6 switches from the first state to the second state; the compressor 1 is configured such that when the motor unit starts from the stopped state, the bypass valve 6 switches from the second state to the third state, and when P1≥P2, the bypass valve 6 switches to the first state, and when P1<P2, if the motor unit is not stopped, the bypass valve 6 remains in the third state, and if the motor unit is stopped, the bypass valve 6 switches to the second state; where P1 is the pressure at the first port 6a and P2 is the pressure at the second port 6b. In this embodiment, due to the addition of a pressure control signal, therefore, the electrical signal of the electromagnetic control unit 6g of the bypass valve 6 can be connected to the control signal of the motor unit, or a control unit can be independently provided for control.

[0055] In still some other embodiments, the bypass valve 6 has a first state, a second state, and a third state: as Figure 6 shown, in the first state, the first port 6a is in communication with the second port 6b, and the fourth port 6h is in communication with the third port 6c; as Figure 7 shown, in the second state, the first port 6a is in communication with the third port 6c, the first port 6a is disconnected from the second port 6b, and the third port 6c is disconnected from the fourth port 6h; as Figure 8As shown, in the third state, the first port 6a is disconnected from the second port 6b, and the fourth port 6h is in communication with the third port 6c. The compressor 1 is configured such that when the motor unit stops from the operating state, the bypass valve 6 switches from the first state to the second state; the compressor 1 is configured such that when the motor unit starts from the stopped state, the bypass valve 6 switches from the second state to the third state, and after maintaining a preset time t, if the motor unit does not stop, the bypass valve 6 switches to the first state, and if the motor unit stops, the bypass valve 6 switches to the second state, where 1 second ≤ t ≤ 10 seconds is satisfied, or 2 seconds ≤ t ≤ 6 seconds is satisfied.

[0056] Reference is made below Figures 2 - 4 to describe the structures of two types of compressors 1 according to embodiments of the present invention.

[0057] As Figure 2 and Figure 3 shown, in some embodiments, the compressor 1 further includes: a liquid reservoir, the outlet of the liquid reservoir is in communication with the air inlet of the compression mechanism portion, an intake pipe 13 is provided on the liquid reservoir, and the intake side includes the liquid reservoir and the intake pipe 13; a sealed container 11 defines a high-pressure accommodation chamber, an exhaust pipe 12 is provided on the sealed container 11, and the exhaust side includes the accommodation chamber and the exhaust pipe 12.

[0058] That is to say, the sealed container 11 encloses a high-pressure internal space, an exhaust pipe 12 communicating with the high-pressure internal space is provided on the sealed container 11, 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 unit and the compression mechanism portion are arranged in the high-pressure internal space of the sealed container 11; the liquid reservoir is arranged outside the sealed container 11, the outlet of the liquid reservoir is in communication with the air inlet of the compressor 1, an intake pipe 13 is provided on the liquid reservoir, and the intake pipe 13 is in communication with the intake side pipeline 13a (low-pressure pipeline) of the refrigeration device. The liquid reservoir and the intake pipe 13 together constitute the low-pressure side of the compressor 1.

[0059] The first port 6a of the bypass valve 6 is in communication with the high-pressure side of the compressor 1, the second port 6b of the bypass valve 6 is in communication with the exhaust side pipeline 12a (high-pressure pipeline) of the refrigeration device, the third port 6c of the bypass valve 6 is in communication with the intake side of the compressor 1, and the fourth port 6h of the bypass valve 6 is in communication with the intake side pipeline 13a (low-pressure pipeline) of the refrigeration device.

[0060] As Figure 4 shown, in other embodiments, the sealed container 11 defines a low-pressure first chamber and a high-pressure second chamber, an intake pipe 13 communicating with the first chamber is provided on the sealed container 11, an exhaust pipe 12 communicating with the second chamber is provided on the sealed container 11, the intake side includes the first chamber and the intake pipe 13, and the exhaust side includes the second chamber and the exhaust pipe 12.

[0061] That is to say, the sealed container 11 encloses a low-pressure internal space. An intake pipe 13 communicating with the low-pressure internal space is provided on the sealed container 11. The intake pipe 13 is communicated with the intake-side pipeline 13a (low-pressure pipeline) of the refrigeration device. The low-pressure internal space and the intake pipe 13 together constitute the low-pressure side of the compressor 1. The motor part and the compression mechanism part are arranged in the internal space of the low-pressure sealed container 11.

[0062] In particular, in some designs, the internal space of the sealed container 11 is divided into two parts: a low-pressure internal space with a larger volume and a high-pressure internal space with a smaller volume. One end of the compressor 1 structure 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 a compressor 1 with a low-pressure structure inside the sealed container 11.

[0063] The compressor 1 with a low-pressure structure inside the sealed container 11 also has a high-pressure exhaust cavity and an exhaust pipe 12. The high-pressure exhaust cavity is a space for accommodating the high-pressure gas compressed by the compressor 1 mechanism to be hermetically separated from the low-pressure internal space. The exhaust pipe 12 communicates with the high-pressure exhaust cavity. In actual design, the high-pressure exhaust cavity can be arranged in the internal space of the sealed container 11 or outside the sealed container 11. The high-pressure exhaust cavity and the exhaust pipe 12 together constitute the high-pressure side of the compressor 1.

[0064] The first port 6a of the bypass valve 6 is communicated with the high-pressure side of the compressor 1. The second port 6b of the bypass valve 6 is communicated with the exhaust-side pipeline 12a (high-pressure pipeline) of the refrigeration device. The third port 6c of the bypass valve 6 is communicated with the intake side of the compressor 1. The fourth port 6h of the bypass valve 6 is communicated with the intake-side pipeline 13a (low-pressure pipeline) of the refrigeration device.

[0065] From the above description, it can be seen that for the compressor 1 of the embodiment of the present invention, by simply adding a bypass valve 6, the dual effects of waste heat utilization and rapid pressure balance of the system can be achieved simultaneously. It is particularly suitable for occasions that are sensitive to the starting pressure difference, have a large starting torque, and have requirements for rapid restart. It is particularly effective for the application of rotary compressors and has the advantages of low cost, wide application range, and simple and reliable control.

[0066] Next, refer to Figures 1 - 8 Describe the refrigeration device according to the embodiment of the present invention. The refrigeration device of the embodiment of the present invention can be an air conditioner, a refrigerator, etc.

[0067] Such as Figure 5As shown in the figure, a refrigeration device according to an embodiment of the present invention includes: a compressor 1, a first heat exchanger 2, a throttle valve 4, and a second heat exchanger 3. The compressor 1 is the compressor 1 of any of the above embodiments. The first interface of the first heat exchanger 2 is connected to the second port 6b of the bypass valve 6, and the first interface of the first heat exchanger 2 and the second port 6b of the bypass valve 6 are connected through an exhaust-side pipeline 12a (high-pressure pipeline). The throttle valve 4 is connected between the second interface of the first heat exchanger 2 and the first interface of the second heat exchanger 3. The second interface of the second heat exchanger 3 is connected to the fourth port 6h, and the second interface of the second heat exchanger 3 and the fourth port 6h are connected through a suction-side pipeline 13a (low-pressure pipeline). The fourth port 6h can be formed as the suction port of the compressor 1.

[0068] The refrigeration device according to the embodiment of the present invention can achieve quick restart, and can also utilize the remaining heat after the compressor 1 stops, with high energy efficiency.

[0069] As Figures 1 - 4 As shown in the figure, a refrigeration device according to another embodiment of the present invention includes: a compressor 1, a reversing device 5, a first heat exchanger 2, a throttle valve 4, and a second heat exchanger 3.

[0070] The reversing device 5 includes 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 to the second port 6b. The second port 5b is connected to the first interface of the first heat exchanger 2, and the second port 5b and the first interface of the first heat exchanger 2 are connected through an exhaust-side pipeline 12a (high-pressure pipeline). The throttle valve 4 is connected between the second interface of the first heat exchanger 2 and the first interface of the second heat exchanger 3. The second interface of the second heat exchanger 3 is connected to the fourth port 5d. The third port 5c is connected to the fourth port 6h, and the third port 5c and the fourth port 6h are connected through a suction-side pipeline 13a (low-pressure pipeline). The fourth port 6h can be formed as the suction port of the compressor 1.

[0071] When the first port 5a is connected to the second port 5b and the third port 5c is connected to the fourth port 5d, the first heat exchanger 2 is the high-pressure side heat exchanger and the second heat exchanger 3 is the low-pressure side heat exchanger; when the first port 5a is connected to the fourth port 5d and the second port 5b is connected to the third port 5c, the second heat exchanger 3 is the high-pressure side heat exchanger and the first heat exchanger 2 is the low-pressure side heat exchanger.

[0072] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A compressor, characterized in that, it comprises: a sealed container; a motor part and a compression mechanism part, both the motor part and the compression mechanism part are arranged in the sealed container; a bypass valve, the bypass valve includes a first port, a second port, a third port, and a fourth port, the first port can be selectively communicated with one of the second port and the third port, and the fourth port can be selectively communicated with the third port; wherein the compressor has a separated exhaust side and suction side, the first port is communicated with the exhaust side, the third port is communicated with the suction side, when the first port is communicated with the second port and the third port is communicated with the fourth port, the exhaust side is adapted to exhaust to external components through the second port, and the suction side is adapted to suck air from external components through the fourth port; the bypass valve includes: a valve body, the valve body defines a valve cavity, the first port, the second port, the third port, and the fourth port are all arranged on the valve body and are all communicated with the valve cavity; a valve core, the valve core is movably arranged in the valve body, the valve core has a first flow channel, a second flow channel, and a third flow channel, the first port and the second port are adapted to be communicated through the first flow channel and the third port and the fourth port are adapted to be communicated through the second flow channel, or the first port and the third port are adapted to be communicated through the third flow channel.

2. The compressor according to claim 1, characterized in that, 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 and the third port are arranged on the first side surface of the valve body and are spaced apart along the axial direction, the second port and the fourth port are arranged on the second side surface of the valve body and are spaced apart along the axial direction, the two open ends of the first flow channel and the two open ends of the second flow channel respectively face the first side surface and the second side surface of the valve body, and the two open ends of the third flow channel both face the first side surface of the valve body.

3. The compressor according to claim 2, characterized in that, the first flow channel and the second flow channel are arranged spaced apart along the axial direction of the valve core, and the width of the second flow channel along the axial direction of the valve core is greater than the width of the first flow channel along the axial direction of the valve core.

4. The compressor according to claim 1, characterized in that, the bypass valve further includes: an electromagnetic control part, the electromagnetic control part is electromagnetically connected to the valve core.

5. The compressor according to claim 1, characterized in that, the bypass valve has a first state and a second state, in the first state, the first port is communicated with the second port, and the fourth port is communicated with the third port, in the second state, the first port is communicated with the third port, the connection between the first port and the second port is disconnected, and the connection between the third port and the fourth port is disconnected; The compressor is configured such that when the motor unit stops from the operating state, the bypass valve switches from the first state to the second state; the compressor is configured such that when the motor unit starts from the stopped state, the bypass valve switches from the second state to the first state.

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

7. The compressor according to claim 6, wherein, the compressor is configured such that when the motor unit stops from the operating state, the bypass valve switches from the first state to the second state; the compressor is configured such that when the motor unit starts from the stopped state, the bypass valve switches from the second state to the third state, and when P1≥P2, the bypass valve switches to the first state, and when P1<P2, if the motor unit is not stopped, the bypass valve remains in the third state, and if the motor unit is stopped, the bypass valve switches to the second state; wherein, P1 is the pressure at the first port, and P2 is the pressure at the second port.

8. The compressor according to claim 6, wherein, the compressor is configured such that when the motor unit stops from the operating state, the bypass valve switches from the first state to the second state; the compressor is configured such that when the motor unit starts from the stopped state, the bypass valve switches from the second state to the third state, and after maintaining a preset time t, if the motor unit is not stopped, the bypass valve switches to the first state, and if the motor unit is stopped, the bypass valve switches to the second state.

9. The compressor according to claim 8, wherein, it satisfies: 1 second ≤ t ≤ 10 seconds.

10. The compressor according to any one of claims 1-9, wherein, further comprising: a liquid receiver, an outlet of the liquid receiver is in communication with an inlet of the compression mechanism part, an intake pipe is provided on the liquid receiver, and the intake side includes the liquid receiver and the intake pipe; the sealed container defines a high-pressure accommodation chamber, an exhaust pipe is provided on the sealed container, and the exhaust side includes the accommodation chamber and the exhaust pipe.

11. The compressor according to any one of claims 1-9, wherein, the sealed container defines a low-pressure first chamber and a high-pressure second chamber, an intake pipe in communication with the first chamber is provided on the sealed container, an exhaust pipe in communication with the second chamber is provided on the sealed container, the intake side includes the first chamber and the intake pipe, and the exhaust side includes the second chamber and the exhaust pipe.

12. A refrigeration device, wherein, comprising: The first heat exchanger, the throttle valve, the second heat exchanger, and the compressor according to any one of claims 1-11, wherein a first interface of the first heat exchanger is connected to the second port, the throttle 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 to the fourth port.

13. A refrigeration device, characterized in that it comprises: a commutation device, a first heat exchanger, a throttle valve, a second heat exchanger, and the compressor according to any one of claims 1-11, wherein the commutation device comprises a first port, a second port, a third port, and a fourth port, the first port is connected to the second port, the second port is connected to a first interface of the first heat exchanger, the throttle valve is connected between a second interface of the first heat exchanger and a first interface of the second heat exchanger, a second interface of the second heat exchanger is connected to the fourth port, and the third port is connected to the fourth port.

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