Compressor and air conditioning system

Abstract

The invention relates to the technical field of compressors, and discloses a compressor which comprises a compression part, a first piston, a second piston and a third piston, the compression part comprises a first shell, and an intermediate-pressure cylinder and a low-pressure cylinder are arranged in the first shell; the gas-liquid separation part comprises a second shell, and a medium-pressure chamber and a low-pressure chamber are arranged in the second shell; wherein the medium-pressure chamber is provided with a medium-pressure inflow pipe and a medium-pressure outflow pipe, and the medium-pressure outflow pipe is communicated with the medium-pressure cylinder; the low-pressure chamber is provided with a low-pressure inflow pipe and a low-pressure outflow pipe, and the low-pressure outflow pipe is communicated with the low-pressure cylinder; the communicating part is used for communicating or isolating the medium-pressure chamber and the low-pressure chamber; and in addition, the communication condition is defined as follows: under the condition that the pressure of the medium-pressure cylinder is smaller than the pressure of the low-pressure cylinder by a preset threshold value, the communication part is in a communication state, so that the refrigerant flows to the medium-pressure chamber from the low-pressure chamber. The invention further discloses an air conditioning system.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, for example, to a compressor and an air-conditioning system. Background Art

[0002] With the development of science and technology and the improvement of people's living standards, air conditioners have been widely used, people's requirements for the use of air conditioners have become higher and higher, and the performance of air conditioners has been continuously optimized. Among them, three-pipe air conditioners came into being and can be used in different heat exchange scenarios. However, the compressor in the current three-pipe air conditioner can compress a fixed volume of gas, so it does not match the indoor load demand in some heat exchange scenarios, resulting in low heat exchange efficiency of the air conditioner.

[0003] The related art discloses an air conditioner, which includes at least two indoor heat exchangers, a compressor, an outdoor heat exchanger and a refrigerant flow control module. The compressor is a two-cylinder compressor with two return ports and one exhaust port. The second port of the first indoor heat exchanger and the fourth port of the second indoor heat exchanger are both connected to the sixth port of the outdoor heat exchanger. The two return ports and exhaust ports of the compressor are both connected to the refrigerant flow control module. The two indoor heat exchangers are respectively connected to the refrigerant flow control module through the first pipeline and the second pipeline, and the outdoor heat exchanger is connected to the refrigerant flow control module through the third pipeline. The refrigerant flow control module is used to control the flow direction of the refrigerant in the first pipeline, the second pipeline and the third pipeline, and control the refrigerant to flow into the first compression cylinder and / or the second compression cylinder. In this way, the compressor can compress the gas using the first compression cylinder alone, the first compression cylinder alone, and the first compression cylinder and the second compression cylinder at the same time, thereby improving the heat exchange efficiency of the three-pipe air conditioner when used in different heat exchange scenarios.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] In some heat exchange scenarios, the flow rate of a certain compression cylinder may be reduced, resulting in a waste of its volume. For example, when the first compression cylinder is used as an intermediate pressure cylinder, the flow rate may be reduced. At this time, the volume of the intermediate pressure cylinder is not fully utilized, resulting in low system energy efficiency.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a compressor and an air-conditioning system, which solve the problem that the volume of the compression cylinder of a twin-cylinder compressor cannot be fully utilized.

[0009] In some embodiments, the compressor comprises:

[0010] The compression part comprises a first shell, in which a medium-pressure cylinder and a low-pressure cylinder are arranged;

[0011] The gas-liquid separation part comprises a second shell, wherein a medium-pressure chamber and a low-pressure chamber are arranged in the second shell; wherein the medium-pressure chamber is provided with a medium-pressure inlet pipe and a medium-pressure outlet pipe, and the medium-pressure outlet pipe is connected to the medium-pressure cylinder; and the low-pressure chamber is provided with a low-pressure inlet pipe and a low-pressure outlet pipe, and the low-pressure outlet pipe is connected to the low-pressure cylinder;

[0012] The connecting part is used to connect or isolate the medium-pressure chamber and the low-pressure chamber; and the connecting condition is defined as: when the pressure of the medium-pressure cylinder is lower than the pressure of the low-pressure cylinder by a preset threshold, the connecting part is in a connecting state, so that the refrigerant flows from the low-pressure chamber to the medium-pressure chamber.

[0013] In some embodiments, the air conditioning system includes the compressor.

[0014] The compressor and air conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0015] The gas-liquid separation part is used to separate the gas and liquid of the refrigerant flowing through. The refrigerant has two flow paths: first, the refrigerant enters the medium-pressure chamber from the medium-pressure inlet pipe, and after gas-liquid separation, the gas flows from the medium-pressure outlet pipe to the medium-pressure cylinder for compression; second, the refrigerant enters the low-pressure chamber from the low-pressure inlet pipe, and after gas-liquid separation, the gas flows from the low-pressure outlet pipe to the low-pressure cylinder for compression. When the refrigerant flow rate of the medium-pressure cylinder is low or even zero, the pressure of the medium-pressure cylinder is lower than that of the low-pressure cylinder. Moreover, when the pressure of the medium-pressure cylinder is lower than the pressure of the low-pressure cylinder by a preset threshold, the connecting part is in a connected state. At this time, the medium-pressure chamber and the low-pressure chamber are connected, and part of the refrigerant in the low-pressure chamber flows to the medium-pressure chamber through the connecting part, and then flows to the medium-pressure cylinder for compression, so that the volume of the medium-pressure cylinder is effectively utilized.

[0016] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0018] Figure 1is a schematic structural diagram of a compressor provided by an embodiment of the present disclosure;

[0019] Figure 2 is a cross-sectional schematic diagram of a compressor provided by an embodiment of the present disclosure;

[0020] Figure 3 is a schematic structural diagram of a gas-liquid separation unit provided in an embodiment of the present disclosure;

[0021] Figure 4 is a schematic structural diagram of a connecting portion and a diaphragm portion provided in an embodiment of the present disclosure;

[0022] Figure 5 is a schematic diagram of a refrigerant flow path in a full cooling mode of an air-conditioning system provided by an embodiment of the present disclosure;

[0023] Figure 6 is a schematic diagram of a refrigerant flow path in a full heating mode of an air-conditioning system provided by an embodiment of the present disclosure;

[0024] Figure 7 It is a schematic diagram of the refrigerant flow path of the reheat dehumidification mode of the air-conditioning system provided in an embodiment of the present disclosure.

[0025] Reference numerals:

[0026] 100, compression unit; 110, first housing; 120, intermediate pressure cylinder; 130, low pressure cylinder; 140, exhaust pipe;

[0027] 200, gas-liquid separation part; 210, second shell; 220, medium-pressure compartment; 221, medium-pressure inflow pipe; 222, medium-pressure outflow pipe; 230, low-pressure compartment; 231, low-pressure inflow pipe; 232, low-pressure outflow pipe; 240, partition; 241, communication port; 250, valve plate; 260, diaphragm part;

[0028] 300, outdoor heat exchanger; 301, third throttle valve; 310, first indoor heat exchanger; 311, first throttle valve; 320, second indoor heat exchanger; 321, second throttle valve; 330, three-way valve; 340, four-way valve; 350, first pipeline; 360, second pipeline. DETAILED DESCRIPTION

[0029] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0030] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] Unless otherwise stated, the term "plurality" means two or more.

[0034] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0035] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0037] Combination Figure 1-7 As shown, an embodiment of the present disclosure provides an air-conditioning system, which includes a compressor.

[0038] Alternatively, if Figure 1 and Figure 2As shown, the compressor includes a compression part 100. The compression part 100 includes a first shell 110, and a medium-pressure cylinder 120 and a low-pressure cylinder 130 are arranged in the first shell 110. Among them, the medium-pressure cylinder 120 has a medium-pressure air intake port and a medium-pressure air exhaust port, and the low-pressure cylinder 130 has a low-pressure air intake port and a low-pressure air exhaust port; the medium-pressure air exhaust port and the low-pressure air exhaust port are both connected to the exhaust chamber, and the exhaust chamber is connected to the exhaust pipe 140.

[0039] In this embodiment, the intermediate pressure cylinder 120 and the low pressure cylinder 130 of the compressor are independent of each other, and the same rotating shaft is used to drive the intermediate pressure cylinder 120 and the low pressure cylinder 130 to rotate synchronously, thereby compressing the refrigerant. In addition, the refrigerant compressed by the intermediate pressure cylinder 120 and the low pressure cylinder 130 is mixed in the exhaust chamber and discharged from the exhaust pipe 140.

[0040] Alternatively, if Figure 1 and Figure 2 As shown, the compressor further includes a gas-liquid separation part 200 and a connecting part. The gas-liquid separation part 200 includes a second shell 210, and a medium-pressure chamber 220 and a low-pressure chamber 230 are arranged in the second shell 210; wherein the medium-pressure chamber 220 is provided with a medium-pressure inlet pipe 221 and a medium-pressure outlet pipe 222, and the medium-pressure outlet pipe 222 is connected to the medium-pressure cylinder 120; the low-pressure chamber 230 is provided with a low-pressure inlet pipe 231 and a low-pressure outlet pipe 232, and the low-pressure outlet pipe 232 is connected to the low-pressure cylinder 130; the connecting part is used to connect or isolate the medium-pressure chamber 220 and the low-pressure chamber 230; and the connecting condition is defined as: when the pressure of the medium-pressure cylinder 120 is lower than the pressure of the low-pressure cylinder 130 by a preset threshold, the connecting part is in a connected state, so that the refrigerant flows from the low-pressure chamber 230 to the medium-pressure chamber 220.

[0041] In this embodiment, the gas-liquid separation part 200 is used to separate the refrigerant flowing through the medium-pressure chamber 220. The refrigerant has two flow paths: first, the refrigerant enters the medium-pressure chamber 220 from the medium-pressure inlet pipe 221. After the gas-liquid separation, the gas flows from the medium-pressure outlet pipe 222 to the medium-pressure cylinder 120 for compression; second, the refrigerant enters the low-pressure chamber 230 from the low-pressure inlet pipe 231. After the gas-liquid separation, the gas flows from the low-pressure outlet pipe 232 to the low-pressure cylinder 130 for compression. When the refrigerant flow rate of the medium-pressure cylinder 120 is low or even zero, the pressure of the medium-pressure cylinder 120 is lower than the pressure of the low-pressure cylinder 130. In addition, when the pressure of the medium-pressure cylinder 120 is lower than the pressure of the low-pressure cylinder 130 by a preset threshold, the connecting part is in a connected state. At this time, the medium-pressure chamber 220 and the low-pressure chamber 230 are connected, and part of the refrigerant in the low-pressure chamber 230 flows to the medium-pressure chamber 220 through the connecting part, and then flows to the medium-pressure cylinder 120 for compression, so that the volume of the medium-pressure cylinder 120 is effectively utilized.

[0042] Here, the medium-pressure outflow pipe 222 is connected to the medium-pressure air intake port, and the low-pressure outflow pipe 232 is connected to the low-pressure air intake port.

[0043] Alternatively, if Figure 3 As shown, the second shell 210 is divided by a partition 240 to form a medium-pressure compartment 220 and a low-pressure compartment 230. The communication portion includes a communication port 241 and a communication structure. The communication port 241 is provided on the partition 240; the communication structure is used to block or avoid the communication port 241; and, when the communication condition is met, the communication structure avoids the communication port 241; when the communication condition is not met, the communication structure blocks the communication port 241.

[0044] In this embodiment, when the connection condition is met, that is, the pressure of the medium-pressure cylinder 120 is lower than the pressure of the low-pressure cylinder 130 by a preset threshold, the connection structure avoids the connection port 241. At this time, part of the refrigerant in the low-pressure chamber 230 flows to the medium-pressure chamber 220 through the connection port 241, and then flows to the medium-pressure cylinder 120 for compression.

[0045] Alternatively, if Figure 4 As shown, the connecting structure includes a valve plate 250, which can be flipped and arranged at the connecting port 241, and the valve plate 250 is located in the medium-pressure chamber 220; and, when the connecting conditions are met, the refrigerant in the low-pressure chamber 230 can open the valve plate 250 through the connecting port 241 and then flow into the medium-pressure chamber 220.

[0046] In this embodiment, the valve plate 250 has a first position and a second position, the first position corresponds to the valve plate 250 avoiding the communication port 241, and the second position corresponds to the valve plate 250 blocking the communication port 241. When the connection condition is met, the refrigerant in the low-pressure chamber 230 passes through the communication port 241 and impacts the valve plate 250, causing the valve plate 250 to flip to the first position and then flow to the medium-pressure chamber 220.

[0047] Optionally, the valve plate 250 is in contact with the partition plate 240 when located at the second position.

[0048] Optionally, the communication structure further includes a spring member connected to the valve plate 250 , and when the communication condition is not met, the spring member provides elastic force to the valve plate 250 to flip the valve plate 250 to a position blocking the communication port 241 , that is, the second position.

[0049] Exemplarily, the first side of the valve plate 250 is pivotally arranged by a rotating shaft, and the second side thereof can be turned around the first side. The spring member includes a torsion spring, which is sleeved on the rotating shaft. When the connection condition is met, the refrigerant impacts the valve plate 250 to turn it to the first position, at which time the torsion spring deforms and stores energy. When the connection condition is not met, the torsion spring releases the elastic force and drives the valve plate 250 to turn to the second position.

[0050] Optionally, the valve plate 250 itself has the elasticity of automatic reset, so that the valve plate 250 can be turned over to a position to block the communication port 241 when the communication condition is not met.

[0051] Exemplarily, the valve plate 250 is made of an elastic steel material, with a first side fixedly arranged and a second side as a free end. When the connection condition is met, the refrigerant impacts the valve plate 250, and the second side of the valve plate 250 is deformed, which is equivalent to a flipping action, and is in the first position. When the connection condition is not met, the valve plate 250 releases its elastic force and resets to the second position.

[0052] Alternatively, if Figure 3 As shown, the partition 240 is arranged vertically; the medium-pressure inlet pipe 221 extends vertically into the medium-pressure chamber 220 from the top, and the medium-pressure outlet pipe 222 extends vertically into the medium-pressure chamber 220 from the bottom; the low-pressure inlet pipe 231 extends vertically into the low-pressure chamber 230 from the top, and the low-pressure outlet pipe 232 extends vertically into the low-pressure chamber 230 from the bottom.

[0053] In this embodiment, the partition 240 is arranged vertically, and the low-pressure compartment 230 and the medium-pressure compartment 220 are respectively located on the left and right sides of the partition 240. The medium-pressure inflow pipe 221, the medium-pressure outflow pipe 222, the low-pressure inflow pipe 231, and the low-pressure outflow pipe 232 are all arranged vertically and in parallel. The outlet end of the medium-pressure inflow pipe 221 extends into the medium-pressure compartment 220, and the inlet end of the medium-pressure outflow pipe 222 extends into the medium-pressure compartment 220. The outlet end of the low-pressure inflow pipe 231 extends into the low-pressure compartment 230, and the inlet end of the low-pressure outflow pipe 232 extends into the low-pressure compartment 230.

[0054] Optionally, the inlet end of the low-pressure outlet pipe 232 is located above the outlet end of the low-pressure inlet pipe 231, and the connecting port 241 is located above the inlet end of the low-pressure outflow pipe 232; and the distance between the connecting port 241 and the inlet end of the low-pressure outflow pipe 232 is h, and h is greater than or equal to 10 cm.

[0055] In this embodiment, after the refrigerant in the low-pressure compartment 230 is separated into gas and liquid, the liquid is located in the lower part of the compartment and the gas is located in the upper part of the compartment. Here, the inlet end of the low-pressure outlet pipe 232 is located above the outlet end of the low-pressure inlet pipe 231, which is conducive to only allowing the gas to flow from the low-pressure outlet pipe 232 to the low-pressure cylinder 130. The connecting port 241 is located above the inlet end of the low-pressure outlet pipe 232, which is conducive to only allowing the gas to flow from the connecting port 241 to the medium-pressure compartment 220. In addition, h is designed to be greater than or equal to 10 cm as the safety height of the connecting port 241. In this way, when the connection condition is not met and the gas only flows to the low-pressure outlet pipe 232, it can prevent the gas from impacting the valve plate 250 and causing an erroneous flipping action.

[0056] Optionally, the low-pressure outflow pipe 232 is arranged close to the partition 240, and the low-pressure inflow pipe 231 is located on the side of the low-pressure outflow pipe 232 away from the partition 240. In this way, when the connection condition is met, the low-pressure inflow pipe 231 is prevented from blocking the gas, and the gas can effectively open the valve plate 250.

[0057] Optionally, the height of the inlet end of the medium-pressure outlet pipe 222 is the same as the height of the inlet end of the low-pressure outlet pipe 232 .

[0058] Optionally, the height of the outlet end of the medium-pressure inlet pipe 221 is the same as the height of the outlet end of the low-pressure inlet pipe 231 .

[0059] Alternatively, if Figure 4 As shown, the compressor further includes a diaphragm portion 260 , which is disposed on the partition plate 240 and has tension; and when the communication condition is met, the diaphragm portion 260 expands toward the medium-pressure chamber 220 .

[0060] In this embodiment, by providing the diaphragm 260, the volume of the medium-pressure chamber 220 and the low-pressure chamber 230 can be automatically changed following the operating pressure of the two compression cylinders. When the connection condition is not met, the diaphragm 260 remains unchanged due to its own tension, and the volume of the chambers on both sides remains unchanged. When the connection condition is met, the pressure of the low-pressure cylinder 130 is greater than the pressure of the medium-pressure cylinder 120, and accordingly, the pressure of the low-pressure chamber 230 is greater than the pressure of the medium-pressure chamber 220, and the pressure difference causes the diaphragm 260 to expand toward the medium-pressure chamber 220. At this time, the volume of the low-pressure chamber 230 becomes larger, which is conducive to improving the gas-liquid separation effect, and then sufficient gas is generated. Therefore, after part of the gas flows to the medium-pressure chamber 220, the volume of the medium-pressure cylinder 120 is fully utilized and the pressure of the low-pressure cylinder 130 can be maintained. At the same time, the volume of the medium-pressure chamber 220 becomes smaller, which is conducive to the gas from the low-pressure chamber 230 to quickly enter the medium-pressure cylinder 120 through the medium-pressure outflow pipe 222, which is conducive to improving the compression efficiency of the medium-pressure cylinder 120.

[0061] Optionally, the inlet end of the medium pressure outflow pipe 222 is located above the outlet end of the medium pressure inflow pipe 221 , and the diaphragm portion 260 is located between the inlet end of the medium pressure outflow pipe 222 and the outlet end of the medium pressure inflow pipe 221 .

[0062] In this embodiment, the position of the diaphragm 260 on the partition 240 is defined so that it is higher than the height of the inlet end of the medium-pressure outflow pipe 222 and lower than the height of the outlet end of the medium-pressure inflow pipe 221. In this way, when the diaphragm 260 expands toward the medium-pressure chamber 220, the expanded portion is prevented from blocking the inlet end of the medium-pressure outflow pipe 222 or the outlet end of the medium-pressure inflow pipe 221, thereby reducing the impact on the flow of refrigerant at the inlet end and the outlet end.

[0063] Optionally, in the air conditioning system, such as Figure 5-7 As shown, the exhaust pipe 140 of the compressor exhausts air to the refrigerant circulation loop through the four-way valve 340, or exhausts air to the refrigerant circulation loop through the four-way valve 340 and the three-way valve 330 at the same time. The refrigerant circulation loop is provided with an outdoor heat exchanger 300, a first indoor heat exchanger 310 and a second indoor heat exchanger 320; wherein, one of the first indoor heat exchanger 310 and the second indoor heat exchanger 320 is connected to the low-pressure inflow pipe 231 through the four-way valve 340, and the other of the two is connected to the medium-pressure inflow pipe 221 through the three-way valve 330.

[0064] In this embodiment, the air conditioning system includes at least two indoor heat exchangers, which can realize a single evaporation temperature or a double evaporation temperature. Based on the refrigerant flow direction in the cooling mode, a first throttle valve 311 is provided upstream of the first indoor heat exchanger 310, a second throttle valve 321 is provided upstream of the second indoor heat exchanger 320, and a third throttle valve 301 is provided downstream of the outdoor heat exchanger 300. When operating at double evaporation temperatures, the third throttle valve 301 is adjusted to the maximum opening, and at this time, throttling control is only achieved through the first throttle valve 311 and the second throttle valve 321, thereby preventing the compressor's suction pressure from being too low, resulting in increased system energy consumption. In addition, by adjusting the opening of the first throttle valve 311 and the second throttle valve 321, only one indoor heat exchanger can be operated, or two indoor heat exchangers can form different evaporation temperatures.

[0065] Optionally, the one with lower evaporation temperature between the first indoor heat exchanger 310 and the second indoor heat exchanger 320 is connected to the low-pressure inlet pipe 231 ; the one with higher evaporation temperature between the first indoor heat exchanger 310 and the second indoor heat exchanger 320 is connected to the medium-pressure inlet pipe 221 .

[0066] For example, the piping arrangement of the refrigerant circulation loop is as follows: Figure 5 As shown, the first indoor heat exchanger 310 has a higher evaporation temperature and is connected to the first pipeline 350, and the second indoor heat exchanger 320 is connected to the second pipeline 360. In addition, the first pipeline 350 is connected to the medium-pressure inflow pipe 221 through the four-way valve 340, and then connected to the medium-pressure cylinder 120; the second pipeline 360 ​​is connected to the low-pressure inflow pipe 231 through the three-way valve 330, and then connected to the low-pressure cylinder 130.

[0067] Optionally, the number of the first indoor heat exchangers 310 is one or more, and if there are multiple, they are arranged in parallel; the number of the second indoor heat exchangers 320 is one or more, and if there are multiple, they are arranged in parallel; wherein, a first indoor heat exchanger 310 and a second indoor heat exchanger 320 form a group of indoor heat exchange units.

[0068] In this embodiment, in the same group of indoor heat exchange units, the first indoor heat exchanger 310 and the second indoor heat exchanger 320 can cool at the same time, heat at the same time, or cool and heat at the same time. In multiple groups of indoor heat exchange units, cooling or heating can be performed at the same time, or at least one group of indoor heat exchange units can cool and at least one group of indoor heat exchange units can heat. In this way, multiple heat exchange scenarios can be formed.

[0069] Optionally, in the same indoor heat exchange unit, when the first indoor heat exchanger 310 and the second indoor heat exchanger 320 are both in cooling mode, the exhaust pipe 140 only exhausts air to the refrigerant circulation loop through the four-way valve 340; in the same indoor heat exchange unit, when the first indoor heat exchanger 310 and the second indoor heat exchanger 320 are both in heating mode, or one is cooling and the other is heating, the exhaust pipe 140 exhausts air to the refrigerant circulation loop through both the four-way valve 340 and the three-way valve 330; in multiple indoor heat exchange units, when at least one indoor heat exchange unit is in cooling mode and at least one indoor heat exchange unit is in heating mode, the exhaust pipe 140 exhausts air to the refrigerant circulation loop through both the four-way valve 340 and the three-way valve 330.

[0070] Exemplarily, the air conditioning system includes a full cooling mode, that is, the two indoor heat exchangers of the same indoor heat exchange unit are both cooling, and the compressor only exhausts air to the outdoor heat exchanger 300 through the four-way valve 340, such as Figure 5 As shown. And by adjusting the opening of the first throttle valve 311 and the second throttle valve 321, the evaporation temperature of the first indoor heat exchanger 310 is greater than the evaporation temperature of the second indoor heat exchanger 320. The first indoor heat exchanger 310 is connected to the medium-pressure chamber 220 through the four-way valve 340, and then connected to the medium-pressure cylinder 120; the second indoor heat exchanger 320 is connected to the low-pressure chamber 230 through the three-way valve 330, and then connected to the low-pressure cylinder 130. At this time, the medium-pressure cylinder 120 is compressed normally, and the refrigerant flow in the medium-pressure cylinder 120 is normal and greater than the refrigerant flow of the low-pressure cylinder 130. Correspondingly, the connecting part is in an isolated state, that is, the partition 240 blocks the connecting port 241. In this way, the medium-pressure chamber 220 and the low-pressure chamber 230 are isolated.

[0071] In another exemplary embodiment, the air conditioning system includes a full heating mode, that is, the two indoor heat exchangers of the same indoor heat exchange unit are both heating, and the compressor exhausts to the first indoor heat exchanger 310 through the four-way valve 340, and exhausts to the second indoor heat exchanger 320 through the three-way valve 330, such as Figure 6As shown. At this time, the refrigerant of the outdoor heat exchanger 300 flows to the low-pressure chamber 230 through the four-way valve 340, and then flows to the low-pressure cylinder 130; at the same time, the refrigerant flow of the medium-pressure cylinder 120 is low or zero. And when the pressure of the medium-pressure cylinder 120 is lower than the pressure of the low-pressure cylinder 130 by a preset threshold, the connecting part is in a connected state, that is, the partition 240 avoids the connecting port 241. In this way, the medium-pressure chamber 220 and the low-pressure chamber 230 are connected. At this time, part of the refrigerant in the low-pressure chamber 230 flows to the medium-pressure chamber 220 through the connecting port 241, and then this part of the refrigerant flows from the medium-pressure outflow pipe 222 to the medium-pressure cylinder 120 for compression. Furthermore, under the action of the diaphragm 260, the volume of the low-pressure chamber 230 becomes larger, which is beneficial to improving the gas-liquid separation effect, thereby generating sufficient gas; the volume of the medium-pressure chamber 220 becomes smaller, which is beneficial for the gas to quickly enter the medium-pressure cylinder 120, thereby improving the compression efficiency of the medium-pressure cylinder 120. In this way, the volume of the medium-pressure cylinder 120 is effectively utilized, and the energy efficiency of the air-conditioning system in the full heating mode is effectively improved.

[0072] In another exemplary embodiment, the air conditioning system includes a reheat dehumidification mode, that is, the first indoor heat exchanger 310 is used for cooling and dehumidification, and the second indoor heat exchanger 320 is used for heating in the same indoor heat exchange unit. At this time, the compressor exhausts air to the outdoor heat exchanger 300 through the four-way valve 340, and exhausts air to the second indoor heat exchanger 320 through the three-way valve 330. Figure 7 As shown. At this time, the refrigerant of the outdoor heat exchanger 300 flows to the first indoor heat exchanger 310, the refrigerant of the second indoor heat exchanger 320 flows to the first indoor heat exchanger 310, and the refrigerant of the first indoor heat exchanger 310 flows to the low-pressure chamber 230 through the first pipeline 350 and the four-way valve 340, and then flows to the low-pressure cylinder 130; at the same time, the refrigerant flow of the medium-pressure cylinder 120 is low or zero. And when the pressure of the medium-pressure cylinder 120 is lower than the pressure of the low-pressure cylinder 130 by a preset threshold, the connecting part is in a connecting state, that is, the partition 240 avoids the connecting port 241. In this way, the medium-pressure chamber 220 and the low-pressure chamber 230 are connected. At this time, part of the refrigerant in the low-pressure chamber 230 flows to the medium-pressure chamber 220 through the connecting port 241, and then this part of the refrigerant flows from the medium-pressure outflow pipe 222 to the medium-pressure cylinder 120 for compression. Furthermore, under the action of the diaphragm 260, the volume of the low-pressure chamber 230 becomes larger, which is beneficial to improving the gas-liquid separation effect, thereby generating sufficient gas; the volume of the medium-pressure chamber 220 becomes smaller, which is beneficial for the gas to quickly enter the medium-pressure cylinder 120, thereby improving the compression efficiency of the medium-pressure cylinder 120. In this way, the volume of the medium-pressure cylinder 120 is effectively utilized, and the energy efficiency of the air-conditioning system in the reheat dehumidification mode is effectively improved.

[0073] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A compressor, characterized in that: include: The compression part (100) comprises a first shell (110), wherein a medium-pressure cylinder (120) and a low-pressure cylinder (130) are arranged in the first shell (110); The gas-liquid separation part (200) comprises a second shell (210), wherein a medium-pressure chamber (220) and a low-pressure chamber (230) are provided in the second shell (210); wherein the medium-pressure chamber (220) is provided with a medium-pressure inlet pipe (221) and a medium-pressure outlet pipe (222), and the medium-pressure outlet pipe (222) is connected to the medium-pressure cylinder (120); and the low-pressure chamber (230) is provided with a low-pressure inlet pipe (231) and a low-pressure outlet pipe (232), and the low-pressure outlet pipe (232) is connected to the low-pressure cylinder (130); The connecting portion is used to connect or isolate the medium-pressure chamber (220) and the low-pressure chamber (230); and the connecting condition is defined as: when the pressure of the medium-pressure cylinder (120) is lower than the pressure of the low-pressure cylinder (130) by a preset threshold, the connecting portion is in a connected state, so that the refrigerant flows from the low-pressure chamber (230) to the medium-pressure chamber (220).

2. The compressor according to claim 1, characterized in that The second shell (210) is divided into a medium-pressure chamber (220) and a low-pressure chamber (230) by a partition (240); the connecting part includes: A communication port (241) is provided on the partition plate (240); The communication structure is used to block or avoid the communication port (241); and when the communication condition is met, the communication structure avoids the communication port (241); when the communication condition is not met, the communication structure blocks the communication port (241).

3. The compressor according to claim 2, characterized in that The connectivity structure includes: A valve plate (250) is disposed at the communication port (241) in a flippable manner, and the valve plate (250) is located in the medium-pressure chamber (220); Furthermore, when the connection conditions are met, the refrigerant in the low-pressure chamber (230) can break through the valve plate (250) through the communication port (241) and then flow into the medium-pressure chamber (220).

4. The compressor according to claim 3, characterized in that The connectivity structure also includes: A spring member connected to the valve plate (250); Furthermore, when the connection condition is not met, the spring member provides elastic force to the valve plate (250) so that the valve plate (250) turns over to a position that blocks the connection port (241).

5. The compressor according to claim 3, characterized in that The valve plate (250) itself has elasticity for automatic reset, so that the valve plate (250) can be turned over to a position for blocking the communication port (241) when the communication condition is not met.

6. The compressor according to any one of claims 2 to 5, characterized in that: The partition (240) is arranged vertically; The medium-pressure inflow pipe (221) extends vertically from the upper part into the medium-pressure compartment (220), and the medium-pressure outflow pipe (222) extends vertically from the lower part into the medium-pressure compartment (220); the low-pressure inflow pipe (231) extends vertically from the upper part into the low-pressure compartment (230), and the low-pressure outflow pipe (232) extends vertically from the lower part into the low-pressure compartment (230).

7. The compressor according to any one of claims 2 to 5, characterized in that: The inlet end of the low-pressure outflow pipe (232) is located above the outlet end of the low-pressure inflow pipe (231), and the communication port (241) is located above the inlet end of the low-pressure outflow pipe (232); Furthermore, the distance between the communication port (241) and the inlet end of the low-pressure outflow pipe (232) is greater than or equal to 10 cm.

8. The compressor according to any one of claims 2 to 5, characterized in that Also includes: A diaphragm portion (260) is disposed on the partition plate (240) and has tension; Furthermore, when the communication condition is met, the diaphragm portion (260) expands toward the medium-pressure chamber (220).

9. The compressor according to claim 8, characterized in that The inlet end of the medium-pressure outlet pipe (222) is located above the outlet end of the medium-pressure inlet pipe (221), and the diaphragm portion (260) is located between the inlet end of the medium-pressure outlet pipe (222) and the outlet end of the medium-pressure inlet pipe (221).

10. An air conditioning system, characterized in that: Comprising the compressor according to any one of claims 1 to 9.

11. The air conditioning system according to claim 10, characterized in that: The exhaust pipe (140) of the compressor exhausts air to the refrigerant circulation circuit through a four-way valve (340), or exhausts air to the refrigerant circulation circuit through a four-way valve (340) and a three-way valve (330) at the same time. The refrigerant circulation circuit is provided with an outdoor heat exchanger (300), a first indoor heat exchanger (310) and a second indoor heat exchanger (320); wherein one of the first indoor heat exchanger (310) and the second indoor heat exchanger (320) is connected to the low-pressure inlet pipe (231) through the four-way valve (340), and the other of the two is connected to the medium-pressure inlet pipe (221) through the three-way valve (330).

12. The air conditioning system according to claim 11, characterized in that: The one with the lower evaporation temperature between the first indoor heat exchanger (310) and the second indoor heat exchanger (320) is connected to the low-pressure inflow pipe (231); The first indoor heat exchanger (310) and the second indoor heat exchanger (320) having a higher evaporation temperature are connected to the medium-pressure inlet pipe (221).

13. The air conditioning system according to claim 11, characterized in that: The number of the first indoor heat exchangers (310) is one or more, and if there are multiple first indoor heat exchangers (310), they are arranged in parallel; The number of the second indoor heat exchangers (320) is one or more, and if there are multiple second indoor heat exchangers (320), they are arranged in parallel; A first indoor heat exchanger (310) and a second indoor heat exchanger (320) form a group of indoor heat exchange units.

14. The air conditioning system according to claim 13, characterized in that: In the same indoor heat exchange unit, when the first indoor heat exchanger (310) and the second indoor heat exchanger (320) are both in cooling mode, the exhaust pipe (140) only exhausts air to the refrigerant circulation circuit through the four-way valve (340); In the same indoor heat exchange unit, when the first indoor heat exchanger (310) and the second indoor heat exchanger (320) are both in heating mode, or one in cooling mode and the other in heating mode, the exhaust pipe (140) exhausts the air to the refrigerant circulation circuit through the four-way valve (340) and the three-way valve (330) at the same time; In a plurality of indoor heat exchange units, when at least one indoor heat exchange unit is cooling and at least one indoor heat exchange unit is heating, the exhaust pipe (140) exhausts air to the refrigerant circulation circuit through the four-way valve (340) and the three-way valve (330) at the same time.

Images