CN111255914B - Compressor and refrigerating system with same - Google Patents

Abstract

The invention discloses a compressor and a refrigerating system with the same, wherein the compressor comprises: a compressor body having a separate discharge port and suction port; the three-way valve, the three-way valve includes: the valve body is provided with a first port, a second port and a third port, the first port is communicated with the exhaust port, the third port is communicated with the air suction port, the second port is used for being connected with an external part, and the valve core is movably arranged in the valve body and can selectively seal one of the second port and the third port so that the first port can be selectively communicated with the other one of the second port and the third port. According to the compressor, the three-way valve is arranged, so that the compressor body can be quickly restarted, residual heat can be utilized after the compressor body is stopped, the energy efficiency is high, and the three-way valve is simple in structure and convenient to control.

Description

Compressor and refrigerating system with same

Technical Field

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

Background

In the currently commonly used refrigeration device, when the compressor is stopped from the last operation and can be restarted, the pressure difference between the suction side and the exhaust side of the compressor must reach a certain required range to restart the compressor, especially for a system loaded with a rotary compressor with a large amount of refrigerant, the pressure difference must reach a small value, for example, within 1kgf/cm2, otherwise, the compressor cannot be started, and thus the quick restart function after the stop cannot be realized.

On the other hand, in the related art, when the compressor is stopped, the refrigerant in the high pressure side heat exchanger returns to the low pressure side through the clearance of the compressor parts, 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 is wasted and the cooling capacity in the low pressure side heat exchanger is lost, which is not good for the operation efficiency of the refrigerating apparatus.

Disclosure of Invention

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

The compressor according to an embodiment of the present invention includes: a compressor body having a separate discharge port and suction port; a three-way valve, the three-way valve comprising: the valve body is provided with a first port, a second port and a third port, the first port is communicated with the exhaust port, the third port is communicated with the air suction port, the second port is used for being connected with an external part, and the valve core is movably arranged in the valve body and can selectively seal one of the second port and the third port so that the first port can be selectively communicated with the other of the second port and the third port.

According to the compressor, the three-way valve is arranged, so that the compressor body can be restarted quickly, residual heat can be utilized after the compressor body is stopped, the energy efficiency is high, and the three-way valve is simple in structure and convenient to control.

According to the compressor provided by the embodiment of the invention, the valve body defines a valve cavity, the third port is arranged at the end part of the valve body, and when the first port is communicated with the second port, the valve core moves to be pressed against the end part of the valve body to close the third port.

According to the compressor of one embodiment of the present invention, an inner wall of the end portion of the valve body where the third port is provided is planar, an end portion of the valve spool facing the third port is planar, and the end portion of the valve spool is adapted to be brought into surface-to-surface contact with the inner wall of the end portion of the valve body to close the third port.

According to the compressor provided by the embodiment of the invention, the valve body defines a valve cavity, the valve core can selectively divide the valve cavity into a first cavity and a second cavity, the valve core is provided with a flow passage communicated with the first cavity and the second cavity, the flow passage penetrates through the valve core along the axial direction of the valve core, when the valve core moves to a position for closing the second port, the first port is communicated with the first cavity, and the third port is communicated with the second cavity.

According to the compressor provided by the embodiment of the invention, the first port and the second port are arranged on the side surface of the valve body, the first port and the second port are arranged along the movement direction of the valve core in a staggered manner, the third port is arranged at the end part of the valve body, and the peripheral wall of the valve core is pressed against the inner peripheral wall of the valve body.

The compressor further comprises a driving device, the valve core comprises a core rod and a core seat which are connected, the driving device is used for driving the core rod, and the flow channel is arranged on the core seat.

The compressor according to one embodiment of the present invention further includes a driving device including: solenoid and power supply line, the power supply line with solenoid links to each other, just the power supply line with the power cord of compressor body is connected, solenoid is used for the drive the case.

According to the compressor of one embodiment of the present invention, the flow area of the third port is smaller than the flow area of the first port and smaller than the flow area of the second port.

According to the compressor of one embodiment of the present invention, the three-way valve has a first state in which the first port communicates with the second port and the first port is disconnected from the third port, and a second state in which the first port communicates with the third port and the first port is disconnected from the second port; the compressor is configured such that the three-way valve is switched from a first state to a second state when the compressor body is stopped from an operating state; the compressor is configured such that the three-way valve is switched from the second state to the first state when the compressor body is started from a stopped state.

The invention also proposes a refrigeration system comprising: a first heat exchanger, a throttle valve, a second heat exchanger, a compressor according to any one of claims 1 to 9, 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.

The invention also proposes a refrigeration system comprising: a reversing device, a first heat exchanger, a throttle valve, a second heat exchanger, and a compressor as claimed in any one of claims 1 to 9, wherein the reversing device includes a first valve port, a second valve port, a third valve port, and a fourth valve port, the first valve port is connected to the second port, the second valve port is connected to the first port of the first heat exchanger, the throttle valve is 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 is connected to the fourth valve port, and the third valve port is connected to the suction port of the compressor.

The advantages of the refrigeration system and the compressor described above with respect to the prior art are the same and will not be described in detail here.

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 is a schematic diagram of a refrigeration system according to an embodiment of the present invention when turned on;

fig. 2 is a schematic structural view of a three-way valve according to an embodiment of the invention in a first state;

FIG. 3 is a schematic diagram of a refrigeration system according to an embodiment of the present invention in a shutdown configuration;

fig. 4 is a schematic structural view of a three-way valve according to an embodiment of the invention in a second state.

Reference numerals are as follows:

a compressor body 1, an exhaust port 12, an exhaust port pipeline 12a, an air inlet 13, an air inlet pipeline 13a,

a first heat exchanger 2, a second heat exchanger 3, a throttle valve 4,

a reversing device 5, a first valve port 5a, a second valve port 5b, a third valve port 5c, a fourth valve port 5d,

a three-way valve 6, a first port 6a, a second port 6b, a third port 6c,

the valve body 61, the first chamber 61a, the second chamber 61b,

valve core 62, core rod 62a, core seat 62b, flow passage 62c,

an electromagnetic coil 63 and a power supply line 64.

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.

A compressor and a refrigeration system having the same according to an embodiment of the present invention will be described with reference to fig. 1 to 4.

As shown in fig. 1 to 4, a compressor according to one embodiment of the present invention includes: compressor body 1 and three-way valve 6.

The compressor body 1 is provided with an exhaust port 12 and an air suction port 13 which are separated, the compressor body 1 comprises a sealed container, a motor part and a compression mechanism part, the motor part and the compression mechanism part are both arranged in the sealed container, the motor part is used for driving the compression mechanism part to suck air and compress and exhaust air, a separated exhaust side and a separated air suction side are arranged in the sealed container, the exhaust port 12 is communicated with the exhaust side, the air suction port 13 is communicated with the air suction side, the exhaust side is a high-pressure side, and the air suction side is a low-pressure side.

The three-way valve 6 includes: the valve comprises a valve body 61 and a valve core 62, wherein the valve body 61 is provided with a first port 6a, a second port 6b and a third port 6c, the first port 6a is communicated with the exhaust port 12, the third port 6c is communicated with the suction port 13, the second port 6b is used for being connected with external parts, and the valve core 62 is movably arranged in the valve body 61 and can selectively seal one of the second port 6b and the third port 6c, so that the first port 6a can selectively be communicated with the other of the second port 6b and the third port 6 c.

It is understood that the valve spool 62 is axially movably disposed in the valve body 61, and the valve spool 62 moves to switch the communication state of the first port 6a, the second port 6b, and the third port 6 c.

The first port 6a communicates with the exhaust port 12, the third port 6c communicates with the suction port 13, and the second port 6b is used for connection with an external component.

In other words, the compressor body 1 is connected to the external pipe through the second port 6b, and when the first port 6a is disconnected from the second port 6b, the discharge port 12 of the compressor body 1 is disconnected from the external pipe, and the residual heat of the high-pressure side heat exchanger can be continuously utilized.

As shown in fig. 1 and 2, when the compressor body 1 is normally started, the motor portion is operated, the first port 6a of the three-way valve 6 is communicated with the second port 6b, and the third port 6c is disconnected from the first port 6a, the high-pressure gas output from the compressor body 1 is output from the exhaust port 12 to an exhaust port 12 pipeline of the refrigeration system through the first port 6a and the second port 6b, and the suction port 13 of the compressor body 1 sucks air through the suction port 13 pipeline.

As shown in fig. 3 and 4, when the compressor body 1 stops operating, the motor portion does not operate, the first port 6a and the third port 6c of the three-way valve 6 are communicated, and the first port 6a and the second port 6b are disconnected. That is, the three-way valve 6 communicates the discharge port 12 of the compressor body 1 with the suction port 13 and disconnects the discharge port 12 of the compressor body 1 from other components of the refrigeration system, the first port 6a is disconnected from the second port 6b, and the first port 6a is communicated with the third port 6c, achieving rapid pressure balance of the first port 6a and the third port 6 c.

Thus, when the compressor body 1 is stopped, the pressures of the exhaust port 12 and the suction port 13 of the compressor body 1 can be quickly balanced, which is convenient for quickly restarting the compressor body 1.

On the other hand, when the compressor body 1 is stopped, the three-way valve 6 cuts off the communication between the exhaust port 12 of the compressor body 1 and the refrigeration system, the inside of the high-pressure side heat exchanger is kept in a higher pressure state, and the throttle valve 4 still has a certain flow rate 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 body 1 is stopped, the three-way valve 6 disconnects the high-pressure side and the high-pressure side heat exchanger of the compressor body 1 and directly communicates the high-pressure side and the low-pressure side of the compressor body 1, and the volume of the high-pressure side of the compressor body 1 is smaller, and the three-way valve 6 is provided with a direct communication channel, so that the high-pressure side and the low-pressure side of the compressor body 1 can quickly realize pressure balance, the requirement of small pressure difference when the compressor body 1 is started is met, and the function of quickly restarting the compressor body 1 after the compressor body 1 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 the fastest minute according to the size of the selected bypass channel of the three-way valve 6.

As can be seen from the above description, the compressor body 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 three-way 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 compressor body 1, and has the advantages of low cost, wide application range, and simple and reliable control.

According to the compressor provided by the embodiment of the invention, the three-way valve 6 is arranged, so that the compressor body 1 can be rapidly restarted, residual heat can be utilized after the compressor body 1 is stopped, the energy efficiency is high, and the three-way valve 6 is simple in structure and convenient to control.

The three-way valve 6 of the embodiment of the invention is described below with reference to fig. 2 and 4.

The three-way valve 6 further includes: solenoid 63 and power supply line 64, power supply line 64 links to each other with solenoid 63, and power supply line 64 is connected with the power cord of compressor body 1, and solenoid 63 is used for driving valve core 62, and then solenoid 63 is circular telegram to compressor body 1 circular telegram, drives valve core 62 and moves the position that first port 6a communicates with second port 6b, and solenoid 63 is deenergized to compressor body 1 outage then, drives valve core 62 and moves the position that first port 6a communicates with third port 6 c.

As shown in fig. 2 and 4, the flow area of the third port 6c is smaller than the flow area of the first port 6a, and the flow area of the third port 6c is smaller than the flow area of the second port 6 b. It can be understood that, because the inner space of the compressor communicated with the first port 6a is limited, the third port 6c with a smaller pipe diameter can realize rapid pressure balance.

In some embodiments, as shown in fig. 2 and 4, the valve body 61 defines a valve chamber, the third port 6c is provided at an end of the valve body 61, and when the first port 6a communicates with the second port 6b, the valve spool 62 moves to press against the end of the valve body 61 to close the third port 6 c. Through the third port 6c disposed at the end of the valve body 61, when the first port 6a communicates with the second port 6b, that is, when the three-way valve 6 connects the high-pressure side of the compressor body 1 to the high-pressure side heat exchanger, the pressure inside the three-way valve 6 is relatively high, and the relatively high pressure can push the valve element 62 toward the end of the valve body 61, so that the valve element 62 can seal the third port 6c better.

In the related art, in a refrigeration system, a pressure difference between high pressure and low pressure is generally large, for example, a pressure difference of 1 to 2MPa is generally applied to R410A refrigerant which is widely used at present when the refrigerant normally operates, and when a differential pressure acting force acts on the valve element 62, a direction of action of the differential pressure force of the gas is directed toward an end portion of the valve body 61 (i.e., a direction of the third port 6 c), so that the valve element 62 increases a direction of the differential pressure force acting on the third port 6c

The left side of the valve core 6231 is communicated with high-pressure exhaust, the differential pressure action direction of the gas is rightward, the plane contact force of the valve core 62 to the port is increased, and the port is better sealed.

In some embodiments, as shown in fig. 2 and 4, the inner wall of the end of the valve body 61 where the third port 6c is provided is planar, the end of the valve core 62 facing the third port 6c is planar, and the end of the valve core 62 is adapted to form a surface-to-surface contact with the inner wall of the end of the valve body 61 to close the third port 6c, so that the surface-to-surface contact sealing manner can achieve a better sealing effect, and thus the closing of the third port 6c can be better achieved.

In some embodiments, as shown in fig. 2 and 4, the valve body 61 defines a valve chamber, the valve core 62 selectively divides the valve chamber into a first chamber 61a and a second chamber 61b, and the valve core 62 is provided with a flow passage 62c communicating the first chamber 61a and the second chamber 61b, the flow passage 62c penetrates the valve core 62 in the axial direction of the valve core 62, and when the valve core 62 moves to a position of closing the second port 6b, the first port 6a communicates with the first chamber 61a, and the third port 6c communicates with the second chamber 61 b.

Thereby, the spool 62 is movable within the valve body 61, and when the valve body 61 is moved to a position where the second port 6b is closed, the spool 62 divides the valve chamber into a first chamber 61a and a second chamber 61b, the first port 6a communicates with the first chamber 61a, the third port 6c communicates with the second chamber 61b, and at this time, the first chamber 61a communicates with the second chamber 61b through the flow passage 62c, thereby achieving communication of the first port 6a with the second port 6 b.

In some embodiments, as shown in fig. 2 and 4, the first port 6a and the second port 6b are disposed on the side of the valve body 61, and the first port 6a and the second port 6b are disposed in a staggered manner along the moving direction of the valve spool 62, so that when the valve spool 62 moves to close the second port 6b, the valve spool 62 does not close the first port 6a, thereby ensuring that the first port 6a is always communicated with the valve chamber.

The third port 6c is disposed at the end of the valve body 61, and the outer peripheral wall of the valve core 62 presses against the inner peripheral wall of the valve body 61, so that the end of the valve core 62 can close the third port 6c, and the outer peripheral wall of the valve core 62 can close the second port 6 b.

In some examples, the second port 6b is axially disposed between the first port 6a and the third port 6c, and the length of the valve cavity is less than the axial distance between the third port 6c and the second port 6b, whereby, when the spool 62 moves within the valve body 61, the spool 62 can move axially between the third port 6c and the first port 6a, when the spool 62 moves to the third port 6c and the end surface of the spool 62 abuts against the end of the valve body 61 where the third port 6c is located, the spool 62 closes the third port 6c, and the peripheral wall of the spool 62 does not close the second port 6b, the second port 6b communicates with the valve cavity, and the first port 6a normally communicates with the valve cavity, thereby communicating the first port 6a with the second port 6 b; when the valve core 62 moves to the second port 6b, and the outer peripheral wall of the valve core 62 abuts against the inner peripheral wall of the valve body 61 at the second port 6b, the valve core 62 closes the second port 6b, and divides the valve cavity into a first cavity 61a and a second cavity 61b on two sides of the valve core 62, wherein the first cavity 61a is communicated with the first port 6a, the end of the third cavity is the end where the third port 6c is located, and a flow passage 62c axially penetrating through the valve core 62 is arranged on the valve core 62, so that the first cavity 61a is communicated with the second cavity 61b, and the first port 6a is communicated with the second port 6 b.

In some examples, the compressor further includes a driving device, the valve core 62 includes a core rod 62a and a core seat 62b connected to each other, the driving device is configured to drive the core rod 62a, and the flow passage 62c is disposed in the core seat 62b, and the driving device can drive the core rod 62a to move in the valve cavity.

In some embodiments, the three-way valve 6 has a first state and a second state: as shown in fig. 2, 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. 4, 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 is arranged such that when the compressor body 1 is shut down from the operating state, the three-way valve 6 is switched from the first state to the second state; the compressor is arranged such that the three-way valve 6 switches from the second state to the first state when the compressor body 1 is started from the stopped state. That is to say, when the compressor starts, the three-way valve 6 is automatically switched to the first state, so that the compressor body 1 can exhaust air outwards, and when the compressor body 1 stops, the three-way valve 6 is automatically switched to the second state, so that the pressures of the exhaust port 12 and the suction port 13 of the compressor body 1 can be balanced quickly, and the compressor can be started quickly next time.

In some embodiments, the compressor body 1 further comprises: reservoir, the export of reservoir and the air inlet intercommunication of compression mechanism portion, be provided with induction port 13 on the reservoir, induction port 13 includes reservoir and induction port 13, and sealed container prescribes a limit to highly compressed chamber that holds, is equipped with gas vent 12 on the sealed container, and gas vent 12 is including holding chamber and gas vent 12.

That is, the sealed container encloses a high-pressure internal space, the sealed container is provided with an exhaust port 12 communicated with the high-pressure internal space, the internal space of the sealed container and the exhaust port 12 jointly form a high-pressure side of the compressor body 1, and the motor part and the compression mechanism are arranged in the high-pressure internal space of the sealed container; the reservoir sets up in the sealed container outside, and the export of reservoir and the air inlet of compressor body 1 intercommunication are provided with induction port 13 on the reservoir, and induction port 13 communicates with 13 pipelines (the low pressure pipeline) of induction port of refrigerating system, and reservoir, induction port 13 constitute the low pressure side of compressor body 1 jointly.

A first port 6a of the three-way valve 6 is communicated with a high pressure side of the compressor body 1, a second port 6b of the three-way valve 6 is communicated with a discharge port 12 pipe (high pressure pipe) of the refrigerating system, and a third port 6c of the three-way valve 6 is communicated with a suction port 13 of the compressor body 1 and a suction port 13 pipe (low pressure pipe) of the refrigerating system.

In other embodiments, the sealed container defines a low pressure chamber communicated with the suction port 13 and a high pressure chamber communicated with the exhaust port 12, that is, the sealed container encloses an internal space with low pressure, the suction port 13 communicated with the internal space with low pressure is arranged on the sealed container, the suction port 13 is communicated with a suction port 13 pipeline (low pressure pipeline) of the refrigeration system, and the internal space with low pressure and the suction port 13 jointly form a low pressure side of the compressor body 1; the motor unit and the compression mechanism unit are disposed in the internal space of the low-pressure sealed container.

In particular, in some designs, the internal space of the hermetic container 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 body 1 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 body 1 is located in the low-pressure internal space, and the compressor body 1 is the compressor body 1 with the low-pressure structure in the hermetic container.

The compressor body 1 of the low-pressure structure in the sealed container is also provided with a high-pressure exhaust cavity and an exhaust port 12, the high-pressure exhaust cavity is used as a space for containing high-pressure gas compressed by the compressor body 1 and is sealed and separated from the low-pressure internal space, and the exhaust port 12 is communicated with the high-pressure exhaust cavity. In practical design, the high-pressure exhaust cavity can be arranged in the inner space of the sealed container and can also be arranged outside the sealed container. The high pressure discharge chamber and the discharge port 12 together constitute the high pressure side of the compressor body 1.

A first port 6a of the three-way valve 6 communicates with the high-pressure side of the compressor body 1, a second port 6b of the three-way valve 6 communicates with a discharge port 12 line (high-pressure line) of the refrigeration system, and a third port 6c of the three-way valve 6 communicates with a suction port 13 of the compressor body 1 and a suction port 13 line (low-pressure line) of the refrigeration system.

It can be seen from the above description that, by adopting the technical scheme of the present invention, through the targeted modification of the three-way valve 6, the dual effects of waste heat utilization and rapid pressure balance of the system can be simultaneously realized, and when the compressor is communicated with the exhaust port 12 pipeline (high pressure pipeline), i.e. when the first port 6a is connected with the second port 6b, the sealing property of the valve core 62 to the third port 6c can be ensured.

A refrigeration system 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. 3.

As shown in fig. 3, a refrigeration system according to an embodiment of the present invention includes: the compressor comprises a compressor body 1, a first heat exchanger 2, a throttle valve 4 and a second heat exchanger 3, wherein the compressor body 1 is the compressor body 1 of any one of the above embodiments, a first interface of the first heat exchanger 2 is connected with a second interface 6b of a three-way valve 6, the first interface of the first heat exchanger 2 is communicated with the second interface 6b of the three-way valve 6 through a vent 12 pipeline (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 with an air suction port 13 of the compressor body 1, the second interface of the second heat exchanger 3 is communicated with the air suction port 13 of the compressor body 1 through an air suction port 13 pipeline (low-pressure pipeline), and the air suction port 13 of the compressor body 1 can be formed at the end of the air suction port 13 of the compressor body 1.

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

As shown in fig. 1, a refrigeration system according to another embodiment of the present invention includes: the compressor comprises a compressor body 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 valve port 5a and a second valve port 5b, the reversing device 5 may be a four-way valve, the first valve port 5a is connected to the second port 6b, the second valve port 5b is connected to the first port of the first heat exchanger 2 through an exhaust port pipe 12a (high pressure pipe), 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 fourth valve port 5d, the third valve port 5c is connected to an air suction port 13 of the compressor body 1 through an air suction port pipe 13a (low pressure pipe), and the air suction port 13 of the compressor body 1 may be formed at an end of the air suction port 13 of the compressor body 1.

When the first valve port 5a is communicated with the second valve port 5b, and the third valve port 5c is communicated with the fourth valve 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 is communicated with the fourth port 5d and the second port 5b is communicated 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 (16)

1. A refrigeration system, characterized by a first heat exchanger, a throttle valve, a second heat exchanger, and a compressor, the compressor comprising:

a compressor body having a separate discharge port and suction port;

a three-way valve, the three-way valve comprising: the valve body is provided with a first port, a second port and a third port, the first port is communicated with the exhaust port, and the valve core is movably arranged in the valve body and can selectively close one of the second port and the third port so as to enable the first port to be selectively communicated with the other of the second port and the third port;

a drive device, the drive device comprising: an electromagnetic coil and a power supply line, wherein the power supply line is connected with the electromagnetic coil and the power supply line is connected with the power supply line of the compressor body, the electromagnetic coil is used for driving the valve core,

the first interface of the first heat exchanger is connected with the second interface, the throttle 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 an air suction port of the compressor through an air suction port pipeline, and the third interface is directly connected with the air suction port pipeline through a pipeline.

2. The refrigerant system as set forth in claim 1, wherein said valve body defines a valve chamber, said third port being disposed at an end of said valve body, said valve spool moving against said end of said valve body to close said third port when said first port is in communication with said second port.

3. The refrigerant system as set forth in claim 2, wherein an inner wall of the end of the valve body where the third port is provided is planar, and an end of the valve spool facing the third port is planar, the end of the valve spool being adapted to be brought into surface-to-surface contact with the inner wall of the end of the valve body to close the third port.

4. The refrigerant system as set forth in claim 1, wherein said valve body defines a valve chamber, said valve spool selectively divides said valve chamber into a first chamber and a second chamber, and said valve spool is provided with a flow passage communicating said first chamber and said second chamber, said flow passage extending through said valve spool in an axial direction of said valve spool, said first port communicating with said first chamber and said third port communicating with said second chamber when said valve spool is moved to a position closing said second port.

5. The refrigeration system according to claim 4, wherein the first port and the second port are disposed on a side surface of the valve body, the first port and the second port are disposed in a staggered manner along a movement direction of the valve element, the third port is disposed at an end portion of the valve body, and an outer peripheral wall of the valve element abuts against an inner peripheral wall of the valve body.

6. The refrigeration system of claim 4, further comprising a driving device, wherein the valve core comprises a core rod and a core seat connected with each other, the driving device is used for driving the core rod, and the flow passage is arranged on the core seat.

7. The refrigerant system as set forth in claim 1, wherein said third port has a flow area that is less than the flow area of said first port and less than the flow area of said second port.

8. The refrigeration system as recited in any one of claims 1 to 7 wherein the three-way 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 three-way valve is switched from a first state to a second state when the compressor body is stopped from an operating state; the compressor is configured such that the three-way valve is switched from the second state to the first state when the compressor body is started from a stopped state.

9. A refrigeration system, comprising: switching-over device, first heat exchanger, choke valve, second heat exchanger and compressor, the compressor includes:

a compressor body having separate discharge and suction ports;

a three-way valve, the three-way valve comprising: the valve body is provided with a first port, a second port and a third port, the first port is communicated with the exhaust port, and the valve core is movably arranged in the valve body and can selectively close one of the second port and the third port so as to enable the first port to be selectively communicated with the other of the second port and the third port;

a drive device, the drive device comprising: an electromagnetic coil and a power supply line connected to the electromagnetic coil and connected to a power supply line of the compressor body, the electromagnetic coil being used to drive the valve body,

the reversing device comprises a first valve port, a second valve port, a third valve port and a fourth valve port, wherein the first valve port is connected with the second port, the second valve port is connected with 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 with the fourth valve port, the third valve port is connected with a suction port of the compressor through a suction port pipeline, the third port is directly connected with the suction port pipeline through a pipeline, when the first valve port is communicated with the second valve port, the third valve port is communicated with the fourth valve port, and when the first valve port is communicated with the fourth valve port, the second valve port is communicated with the third valve port.

10. The refrigerant system as set forth in claim 9, wherein said valve body defines a valve chamber, said third port is provided at an end of said valve body, and said valve spool moves against said end of said valve body to close said third port when said first port is in communication with said second port.

11. The refrigerant system as set forth in claim 10, wherein an inner wall of the end of the valve body where the third port is provided is planar, and an end of the valve spool facing the third port is planar, the end of the valve spool being adapted to be brought into surface-to-surface contact with the inner wall of the end of the valve body to close the third port.

12. The refrigerant system as set forth in claim 9, wherein said valve body defines a valve chamber, said valve spool selectively divides said valve chamber into a first chamber and a second chamber, and said valve spool is provided with a flow passage communicating said first chamber and said second chamber, said flow passage extending through said valve spool in an axial direction of said valve spool, said first port communicating with said first chamber and said third port communicating with said second chamber when said valve spool is moved to a position closing said second port.

13. The refrigeration system of claim 12, wherein the first port and the second port are disposed on a side surface of the valve body, the first port and the second port are arranged in a staggered manner along a movement direction of the valve element, the third port is disposed at an end portion of the valve body, and an outer peripheral wall of the valve element abuts against an inner peripheral wall of the valve body.

14. The refrigeration system of claim 12, further comprising a driving device, wherein the valve core comprises a core rod and a core seat connected with each other, the driving device is used for driving the core rod, and the flow passage is arranged on the core seat.

15. The refrigerant system as set forth in claim 9, wherein said third port has a flow area less than said first port and less than said second port.

16. A refrigeration system as set forth in any of claims 9-15 wherein said three-way valve has a first state in which said first port is in communication with said second port and said first port is disconnected from said third port, and a second state in which said first port is in communication with said third port and said first port is disconnected from said second port;

the compressor is configured such that the three-way valve is switched from a first state to a second state when the compressor body is stopped from an operating state; the compressor is configured such that the three-way valve is switched from the second state to the first state when the compressor body is started from a stopped state.

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