A gas supplement liquid accumulator for a double-cylinder rotary compressor and a refrigeration cycle system

Abstract

The utility model discloses a kind of air supplementing liquid accumulator and refrigeration cycle system for rotor type double-cylinder compressor, air supplementing liquid accumulator includes cylinder, air supplementing pipe and first three-way pipe, one end of air supplementing pipe is in cylinder and the other end is out of cylinder and is communicated with the first pipe of first three-way pipe, the axis of second pipe and third pipe in first three-way pipe is in the same plane and forms first included angle;Second pipe and third pipe of first three-way pipe are simultaneously used to connect with one of upper cylinder cover, intermediate plate or lower cylinder cover.The air supplementing liquid accumulator can separately air supplement on intermediate plate to upper cylinder and lower cylinder, there is no problem of upper cylinder and lower cylinder air connection, and can air supplement to upper cylinder or lower cylinder one cylinder double.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to a gas replenishment and liquid storage device and refrigeration cycle system for a rotary twin-cylinder compressor. Background Technology

[0002] In the existing technology of compressors with intermediate plates, i.e., dual-cylinder compressors, there is an injection hole on the intermediate plate that communicates with both the upper and lower cylinders. This injection hole is connected to the outlet pipe of the gas replenishment receiver. During the process of the gas replenishment receiver replenishing the upper and lower cylinders through this injection hole, it is impossible to avoid cross-contamination between the upper and lower cylinders, which can lead to a decrease in compressor performance. In addition, when replenishing the upper and lower cylinders of the compressor through an injection hole on the intermediate plate to improve the compressor's energy efficiency ratio and achieve the effect of replenishing gas to increase enthalpy, there is a possibility that the replenishment requirements cannot be met, thus affecting the improvement of compressor performance. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the present invention provides a gas replenishment and liquid storage device and a refrigeration cycle system for a rotor-type dual-cylinder compressor. The gas replenishment and liquid storage device can replenish the upper cylinder and the lower cylinder separately on the intermediate plate, and there is no problem of gas leakage between the upper cylinder and the lower cylinder. It can also replenish the upper cylinder or the lower cylinder with two gas in one cylinder.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A gas-liquid reservoir for a rotary twin-cylinder compressor, the compressor including a housing, a compressor unit inside the housing, the compressor unit including an upper cylinder head, an upper cylinder, an intermediate plate, a lower cylinder and a lower cylinder head;

[0006] The gas-injection reservoir includes a cylinder, a gas-injection pipe, and a first three-way pipe. One end of the gas-injection pipe is inside the cylinder, and the other end extends out of the cylinder and is connected to the first pipe of the first three-way pipe. The axes of the second and third pipes in the first three-way pipe are located in the same plane and form a first included angle. The second and third pipes of the first three-way pipe are used to connect to one of the upper cylinder head, the intermediate plate, or the lower cylinder head.

[0007] If the first three-way pipe is used to connect to the upper cylinder head, then the upper cylinder is given double air injection. If the first three-way pipe is used to connect to the intermediate plate, then the upper cylinder or the lower cylinder is given double air injection, or the upper cylinder and the lower cylinder are given air injection separately. If the first three-way pipe is used to connect to the lower cylinder head, then the lower cylinder is given double air injection.

[0008] Furthermore, it also includes a first exhaust pipe and a second exhaust pipe. One end of the first exhaust pipe is connected to the second pipe of the first tee pipe, and one end of the second exhaust pipe is connected to the third pipe of the first tee pipe. The other end of the first exhaust pipe is used to connect to the first injection hole in the upper cylinder head, the intermediate plate, or the lower cylinder head, and the other end of the second exhaust pipe is used to connect to the second injection hole in the upper cylinder head, the intermediate plate, or the lower cylinder head. The first exhaust pipe and the second exhaust pipe are simultaneously used to connect to one of the upper cylinder head, the intermediate plate, or the lower cylinder head.

[0009] Furthermore, the range of the first included angle is used to adjust according to the positional relationship between the first injection hole and the second injection hole; the plane containing the axis of the second and third pipes in the first three-way pipe is perpendicular to the plane containing the axis of the first pipe; both the first and second air outlet pipes are bent pipes, the other end of the first air outlet pipe is used to pass through the housing and communicate with the first injection hole, the other end of the second air outlet pipe is used to pass through the housing and communicate with the second injection hole, and the axes of the other ends of the first and second air outlet pipes are perpendicular to the tangential plane containing the outer peripheral surface at the corresponding position of the housing.

[0010] Furthermore, it also includes a second three-way pipe, the first end of which is connected to the other end of the air injection pipe, the second end of which is connected to the first end of the first three-way pipe, and the third end of which is used to connect to the upper cylinder head, the intermediate plate, or the lower cylinder head. The first three-way pipe and the second three-way pipe are respectively used to connect to any two of the upper cylinder head, the intermediate plate, or the lower cylinder head. If the second and third ends of the first three-way pipe are used to perform two-stage air injection to the upper cylinder, then the third end of the second three-way pipe is used to perform one-stage air injection to the lower cylinder.

[0011] Furthermore, the third pipe of the second three-way pipe is connected to one end of the third exhaust pipe, and the other end of the third exhaust pipe is used to connect to the third injection hole in the upper cylinder head, intermediate plate or lower cylinder head.

[0012] Furthermore, it also includes a four-way pipe, the first end of which is connected to the other end of the air injection pipe, the second end of which is connected to the first end of the first three-way pipe, and the third and fourth ends of which are simultaneously used to connect to one of the upper cylinder head, the intermediate plate, or the lower cylinder head. The first three-way pipe and the four-way pipe are respectively used to connect to any two of the upper cylinder head, the intermediate plate, or the lower cylinder head. If the second and third ends of the first three-way pipe are used to perform two-stage air injection to the upper cylinder, then the third and fourth ends of the four-way pipe are used to perform two-stage air injection to the lower cylinder.

[0013] Furthermore, the third pipe of the four-way pipe is connected to one end of the fourth exhaust pipe, and the other end of the fourth exhaust pipe is used to connect to the fourth injection hole in the upper cylinder head, intermediate plate or lower cylinder head. The fourth pipe of the four-way pipe is connected to one end of the fifth exhaust pipe, and the other end of the fifth exhaust pipe is used to connect to the fifth injection hole in the upper cylinder head, intermediate plate or lower cylinder head.

[0014] Furthermore, the axes of the first and second pipes in the four-way pipe coincide, and the axes of the third and fourth pipes in the four-way pipe are in the same plane and form a second included angle. The range of the second included angle is used to adjust according to the positional relationship between the fourth and fifth injection holes. The plane containing the axes of the third and fourth pipes in the four-way pipe is perpendicular to the plane containing the axes of the first and second pipes. The fourth and fifth exhaust pipes are both bends. The other end of the fourth exhaust pipe is used to pass through the housing and communicate with the fourth injection hole. The other end of the fifth exhaust pipe is used to pass through the housing and communicate with the fifth injection hole. The axes of the other ends of the fourth and fifth exhaust pipes are both perpendicular to the tangential plane of the outer circumferential surface at the corresponding position of the housing.

[0015] A refrigeration cycle system for a rotary twin-cylinder compressor includes an intake receiver, a compressor, a condenser, a throttling device, an economizer, and an evaporator. The compressor includes a housing, and a compressor unit is disposed within the housing. The compressor unit includes an upper cylinder head, an upper cylinder, an intermediate plate, a lower cylinder, and a lower cylinder head arranged sequentially from top to bottom. An upper blade groove is provided axially on the inner wall of the upper cylinder, and a lower blade groove is provided axially on the inner wall of the lower cylinder. The center line of the orthographic projection of the upper blade groove coincides with the center line of the orthographic projection of the lower blade groove. The crankshaft of the compressor passes sequentially through the upper cylinder head, the upper cylinder, the intermediate plate, the lower cylinder, and the lower cylinder head.

[0016] It also includes the aforementioned air-injection liquid receiver for a rotary twin-cylinder compressor, wherein the outlet of the air-injection liquid receiver is connected to the compressor's suction port, the compressor's discharge port is connected to the condenser's inlet, the condenser's outlet is connected to the inlet of a throttling device, the throttling device's outlet is connected to the inlet of an economizer, the economizer's medium-pressure gas outlet is connected to the air-injection liquid receiver's inlet, the economizer's low-pressure liquid outlet is connected to the evaporator's inlet, and the evaporator's outlet is connected to the air-injection liquid receiver's inlet.

[0017] The upper cylinder head, the intermediate plate, or the lower cylinder head is provided with a first air supply channel, a second air supply channel, a first injection hole, and a second injection hole. One end of the first air supply channel is connected to the second pipe of the first three-way pipe, and the other end of the first air supply channel is connected to the first injection hole. One end of the second air supply channel is connected to the third pipe of the first three-way pipe, and the other end of the second air supply channel is connected to the second injection hole.

[0018] Furthermore, the line connecting the orthographic projection center of the first injection hole and the orthographic projection of the intermediate plate axis is called the first injection hole auxiliary line, the line connecting the orthographic projection center of the second injection hole and the orthographic projection of the intermediate plate axis is called the second injection hole auxiliary line, the orthographic projection centerline of the upper blade groove and the orthographic projection centerline of the lower blade groove are both called blade groove auxiliary lines, the angle between the first injection hole auxiliary line and the blade groove auxiliary line is called the first injection hole position angle, the angle between the second injection hole auxiliary line and the blade groove auxiliary line is called the second injection hole position angle, and the first injection hole position angle and the second injection hole position angle are both controlled between 60-150°.

[0019] Furthermore, both the first injection hole and the second injection hole are disposed within the intermediate plate, with the first injection hole facing the upper cylinder side and communicating with the upper cylinder, and the second injection hole facing the lower cylinder side and communicating with the lower cylinder. The first air supply channel is divided into two sections: the corresponding section directly connected to the first air outlet pipe is a first horizontal straight pipe section, and the corresponding section directly connected to the first injection hole is a first inclined pipe section. The second air supply channel is also divided into two sections: the corresponding section directly connected to the second air outlet pipe is a second horizontal straight pipe section, and the corresponding section directly connected to the second injection hole is a second inclined pipe section.

[0020] Furthermore, the position angle of the first injection hole is denoted as θ1, the position angle of the second injection hole is denoted as θ2, the diameter of the first injection hole is denoted as d1, the diameter of the second injection hole is denoted as d2, and θ1<θ2, d1≥d2.

[0021] Furthermore, d1 is controlled between 1mm and 2mm, and d2 is controlled between 1mm and 1.5mm.

[0022] Furthermore, if both the first injection hole and the second injection hole are located inside the upper cylinder head, then both the first injection hole and the second injection hole are connected to the upper cylinder; if both the first injection hole and the second injection hole are located inside the lower cylinder head, then both the first injection hole and the second injection hole are connected to the lower cylinder; if both the first injection hole and the second injection hole are located inside the intermediate plate, then the first injection hole is connected to the upper cylinder and the second injection hole is connected to the lower cylinder, or the first injection hole is connected to the lower cylinder and the second injection hole is connected to the upper cylinder, or both the first injection hole and the second injection hole are connected to the upper cylinder or both are connected to the lower cylinder.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] The rotary twin-cylinder compressor gas-refill receiver of this utility model includes a cylinder, a gas-refill pipe, and a first three-way pipe. One end of the gas-refill pipe is inside the cylinder, and the other end extends out of the cylinder and connects to the first pipe of the first three-way pipe. The axes of the second and third pipes in the first three-way pipe are located in the same plane and form a first angle. The second and third pipes of the first three-way pipe are simultaneously used to connect to one of the upper cylinder head, the intermediate plate, or the lower cylinder head. Through the arrangement of the first three-way pipe, the medium-pressure gaseous refrigerant entering the gas-refill pipe from the gas-refill receiver can be divided into two paths through the first three-way pipe, and simultaneously enter one of the upper cylinder head, the intermediate plate, or the lower cylinder head through the second and third pipes of the first three-way pipe. If the second and third pipes of the first three-way pipe are simultaneously connected to the upper cylinder head, the medium-pressure gaseous refrigerant entering the second and third pipes of the first three-way pipe enters the upper cylinder respectively, achieving dual gas replenishment for the upper cylinder. If the second and third pipes of the first three-way pipe are simultaneously connected to the intermediate plate, then... This gas replenishment receiver can provide dual gas replenishment to either the upper or lower cylinder on the intermediate plate, or individually to both cylinders, eliminating the problem of cross-contamination between them. If the second and third pipes of the first three-way pipe are simultaneously connected to the lower cylinder cover, the medium-pressure gaseous refrigerant entering the second and third pipes of the first three-way pipe will enter the lower cylinder, achieving dual gas replenishment to the lower cylinder. In summary, this gas replenishment receiver can provide individual gas replenishment to both the upper and lower cylinders on the intermediate plate, eliminating cross-contamination. Furthermore, it can provide dual gas replenishment to the upper cylinder on the upper cylinder cover or intermediate plate, and dual gas replenishment to the lower cylinder on the intermediate plate or lower cylinder cover, effectively increasing the gas replenishment range and thus the gas replenishment volume, thereby improving compressor performance. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the gas-replenishing liquid receiver for a rotary twin-cylinder compressor in one embodiment of the present invention;

[0026] Figure 2 for Figure 1 A front view connection diagram of one of the connection methods between the gas replenishment receiver and the compressor;

[0027] Figure 3 for Figure 2 A schematic diagram of the right-side view structure;

[0028] Figure 4 for Figure 2 A top view of the intermediate plate structure;

[0029] Figure 5 for Figure 2 A schematic diagram of the middle plate structure viewed from below;

[0030] Figure 6 for Figure 4 A schematic diagram of the cross-sectional structure along the AA direction;

[0031] Figure 7 This is a schematic diagram showing that both the first and second injection holes are located on the same side of the intermediate plate.

[0032] Figure 8 This is a three-dimensional structural diagram of the gas-replenishing liquid receiver for a rotary twin-cylinder compressor in another embodiment of the present invention;

[0033] Figure 9 for Figure 8 A front view connection diagram of one of the connection methods between the gas replenishment receiver and the compressor;

[0034] Figure 10 for Figure 9 A schematic diagram of the right-side view structure;

[0035] Figure 11 for Figure 8 A bottom view of the upper cylinder head structure;

[0036] Figure 12 for Figure 8 A schematic diagram of the intermediate plate from below;

[0037] Figure 13 This is a three-dimensional structural diagram of the gas-replenishing liquid receiver for a rotary twin-cylinder compressor in another embodiment of the present invention;

[0038] Figure 14 for Figure 13 A front view connection diagram of one of the connection methods between the gas replenishment receiver and the compressor;

[0039] Figure 15 for Figure 14 A schematic diagram of the right-side view structure;

[0040] Figure 16 for Figure 13 A bottom view of the upper cylinder head structure;

[0041] Figure 17 for Figure 13 A schematic diagram of the intermediate plate from below;

[0042] Figure 18 This is a schematic diagram of the refrigeration cycle system of the rotor-type double-cylinder compressor in this utility model.

[0043] Explanation of reference numerals in the diagram: 1. Compressor; 101. Housing; 102. Upper cylinder head; 103. Upper cylinder; 104. Intermediate plate; 105. Lower cylinder; 106. Lower cylinder head; 108. First injection port; 107. Second injection port; 109. Third injection port; 1010. Fourth injection port; 1011. Fifth injection port; 1012. Crankshaft; 1013. First air supply passage; 101301. First horizontal straight pipe section; 101302. First inclined pipe section; 1014. Second air supply passage; 101401. Second horizontal straight pipe section. 101402, Second inclined pipe section, 1015, First injection hole auxiliary line, 1016, Second injection hole auxiliary line, 1017, Blade groove auxiliary line, 2, Gas supply and liquid storage tank, 201, Cylinder, 202, Gas supply pipe, 203, First gas outlet pipe, 204, Second gas outlet pipe, 205, First tee pipe, 206, Second tee pipe, 207, Third gas outlet pipe, 208, Four-way pipe, 209, Fourth gas outlet pipe, 2010, Fifth gas outlet pipe, 3, Inlet gas storage tank, 4, Condenser, 5, Throttling device, 6, Economizer, 7, Evaporator. Detailed Implementation

[0044] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0045] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] A gas-liquid receiver for a rotary twin-cylinder compressor, wherein the compressor 1 includes a housing 101, and a compressor unit is disposed within the housing 101. The compressor unit includes an upper cylinder head 102, an upper cylinder 103, an intermediate plate 104, a lower cylinder 105, and a lower cylinder head 106. Figure 2 , Figure 3 , Figure 9 , Figure 10 , Figure 14 and Figure 15 ;

[0048] The gas-replenishing reservoir 2 includes a cylinder 201, a gas-replenishing pipe 202, and a first three-way pipe 205. One end of the gas-replenishing pipe 202 is inside the cylinder 201, and the other end extends out of the cylinder 201 and connects to the first pipe of the first three-way pipe 205. The axes of the second and third pipes in the first three-way pipe 205 are located in the same plane and form a first angle. Figures 1-3 , Figures 8-10 , Figures 13-15 The second and third pipes of the first three-way pipe 205 are simultaneously used to connect to one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. If the first three-way pipe 205 is used to connect to the upper cylinder head 102, it is used to provide dual air injection to the upper cylinder 103. If the first three-way pipe 205 is used to connect to the intermediate plate 104, it is used to provide dual air injection to either the upper cylinder 103 or the lower cylinder 105, or to provide air injection to either the upper cylinder 103 or the lower cylinder 105 separately. If the first three-way pipe 205 is used to connect to the lower cylinder head 106, it is used to provide dual air injection to the lower cylinder 105. See [link / description]. Figure 2 , Figure 3 , Figure 9 , Figure 10 , Figure 14 , Figure 15 .

[0049] By configuring the first three-way pipe 205, the medium-pressure gaseous refrigerant entering the gas supply pipe 202 from the gas supply receiver 2 can be divided into two paths through the first three-way pipe 205. These two paths then simultaneously enter one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106 through the second and third pipes of the first three-way pipe 205. If both the second and third pipes of the first three-way pipe 205 are connected to the upper cylinder head 102, the medium-pressure gaseous refrigerant entering the second and third pipes of the first three-way pipe 205 enters the upper cylinder 103 respectively, achieving dual gas supply to the upper cylinder 103. If both the second and third pipes of the first three-way pipe 205 are connected to the intermediate plate 104, the medium-pressure gaseous refrigerant entering the upper cylinder 103 enters the upper cylinder 103. The upper cylinder 103 or lower cylinder 105 can be replenished with gas in one cylinder, or the upper cylinder 103 and lower cylinder 105 can be replenished with gas separately. In this way, the gas replenishment reservoir 2 can replenish the upper cylinder 103 or lower cylinder 105 with gas in one cylinder on the intermediate plate 104, or the gas replenishment reservoir 2 can replenish the upper cylinder 103 and lower cylinder 105 separately on the intermediate plate 104, and there is no problem of gas leakage between the upper cylinder 103 and lower cylinder 105. If the second and third pipes of the first three-way pipe 205 are connected to the lower cylinder cover 106 at the same time, the medium-pressure gaseous refrigerant entering the second and third pipes of the first three-way pipe 205 will enter the lower cylinder 105 respectively, realizing the replenishment of the lower cylinder 105 with gas in one cylinder. In summary, the gas replenishment reservoir 2 can replenish gas to the upper cylinder 103 and the lower cylinder 105 separately on the intermediate plate 104, without the problem of gas leakage between the upper cylinder 103 and the lower cylinder 105; and it can replenish gas to the upper cylinder 103 on the upper cylinder cover 102 or the intermediate plate 104, and replenish gas to the lower cylinder 105 on the intermediate plate 104 or the lower cylinder cover 106, so as to effectively increase the replenishment range, thereby increasing the replenishment volume and improving the performance of the compressor 1.

[0050] In one embodiment, the air reservoir 2 further includes a first air outlet pipe 203 and a second air outlet pipe 204. One end of the first air outlet pipe 203 is connected to the second pipe of the first three-way pipe 205, and one end of the second air outlet pipe 204 is connected to the third pipe of the first three-way pipe 205. The other end of the first air outlet pipe 203 is used to connect to the first injection hole 108 in the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. The other end of the second air outlet pipe 204 is used to connect to the second injection hole 107 in the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. The first air outlet pipe 203 and the second air outlet pipe 204 are simultaneously used to connect to one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106.

[0051] By configuring the first three-way pipe 205, the medium-pressure gaseous refrigerant entering the gas supply pipe 202 from the gas supply reservoir 2 can be divided into two paths via the first three-way pipe 205. These paths then simultaneously enter one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106 via the first outlet pipe 203 and the second outlet pipe 204. If both the first outlet pipe 203 and the second outlet pipe 204 are connected to the upper cylinder head 102, the medium-pressure gaseous refrigerant entering the first outlet pipe 203 enters the upper cylinder 103 through the first injection hole 108 in the upper cylinder head 102. Inside, the medium-pressure gaseous refrigerant entering the second outlet pipe 204 enters the upper cylinder 103 through the second injection hole 107 in the upper cylinder head 102, achieving dual air replenishment for the upper cylinder 103. If the first outlet pipe 203 and the second outlet pipe 204 are simultaneously connected to the intermediate plate 104, and the first injection hole 108 and the second injection hole 107 in the intermediate plate 104 face different directions, the medium-pressure gaseous refrigerant entering the first outlet pipe 203 enters the upper cylinder 103 or the lower cylinder 105 through the first injection hole 108 in the intermediate plate 104. The medium-pressure gaseous refrigerant entering the second outlet pipe 204 enters the lower cylinder 105 or upper cylinder 103 through the second injection hole 107 in the intermediate plate 104. By providing non-communicating first injection holes 108 and second injection holes 107 facing different sides on the intermediate plate 104, the gas replenishment reservoir 2 can individually replenish gas to the upper cylinder 103 and lower cylinder 105 on the intermediate plate 104, eliminating the problem of gas leakage between the upper cylinder 103 and lower cylinder 105. Furthermore, when the first injection hole 108 and second injection hole 107 in the intermediate plate 104 face different directions... If the refrigerant is directed to the same side, the gas reservoir 2 can perform dual gas replenishment for the upper cylinder 103 or the lower cylinder 105 on the intermediate plate 104. If the first outlet pipe 203 and the second outlet pipe 204 are connected to the lower cylinder cover 106 at the same time, the medium-pressure gaseous refrigerant entering the first outlet pipe 203 enters the lower cylinder 105 through the first injection hole 108 in the lower cylinder cover 106, while the medium-pressure gaseous refrigerant entering the second outlet pipe 204 enters the lower cylinder 105 through the second injection hole 107 in the lower cylinder cover 106, thus achieving dual gas replenishment for the lower cylinder 105.

[0052] Preferably, such as Figure 1 , Figure 8 and Figure 13 As shown, the range of the first included angle is used to adjust according to the positional relationship between the first injection hole 108 and the second injection hole 107; the plane containing the axes of the second and third pipes in the first tee pipe 205 is perpendicular to the plane containing the axis of the first pipe; both the first exhaust pipe 203 and the second exhaust pipe 204 are bent pipes, the other end of the first exhaust pipe 203 is used to pass through the housing 101 and communicate with the first injection hole 108, and the other end of the second exhaust pipe 204 is used to pass through the housing 101 and communicate with the second injection hole 107, see Figures 2-5 , Figure 7 , Figure 9 , Figure 10 , Figure 12 , Figure 14 , Figure 15 and Figure 17 The axes of the other ends of the first vent pipe 203 and the second vent pipe 204 are both perpendicular to the tangential plane of the outer peripheral surface of the corresponding position of the housing 101.

[0053] Since the first injection hole 108 and the second injection hole 107 are not connected to each other, the first injection hole 108 and the second injection hole 107 are distributed at different positions in one of the upper cylinder head 102, the intermediate plate 104 or the lower cylinder head 106. By designing the axes of the second pipe and the third pipe in the first three-way pipe 205 to be located in the same plane and form a first included angle, and designing the range of the first included angle to be adjusted according to the positional relationship between the first injection hole 108 and the second injection hole 107, the second pipe of the first three-way pipe 205 can be easily connected to the first injection hole 108 through the first exhaust pipe 203, and the third pipe of the first three-way pipe 205 can be easily connected to the second injection hole 107 through the second exhaust pipe 204.

[0054] In addition, since both the first vent pipe 203 and the second vent pipe 204 are bent pipes, the axes of the other ends of the first vent pipe 203 and the second vent pipe 204 are perpendicular to the tangential plane of the outer peripheral surface of the corresponding position of the housing 101. Thus, the other ends of the first vent pipe 203 and the second vent pipe 204 pass perpendicularly through the housing 101.

[0055] In one embodiment,

[0056] The air-fuel reservoir 2 also includes a second three-way pipe 206. The first end of the second three-way pipe 206 is connected to the other end of the air-fuel pipe 202, the second end of the second three-way pipe 206 is connected to the first end of the first three-way pipe 205, and the third end of the second three-way pipe 206 is used to connect to the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. See Figures 8-11 The first three-way pipe 205 and the second three-way pipe 206 are respectively used to connect to any two of the upper cylinder head 102, the intermediate plate 104 or the lower cylinder head 106; if the second and third pipes of the first three-way pipe 205 are used to provide two-stage air replenishment to the upper cylinder 103, then the third pipe of the second three-way pipe 206 is used to provide one-stage air replenishment to the lower cylinder 105; if the second and third pipes of the first three-way pipe 205 are used to provide two-stage air replenishment to the lower cylinder 105, then the third pipe of the second three-way pipe 206 is used to provide one-stage air replenishment to the upper cylinder 103.

[0057] When the air supply pipe 202 is a bent pipe (such as a U-shaped pipe), the second and third pipes of the first three-way pipe 205 are used to supply air to the upper cylinder 103 in two stages, and the third pipe of the second three-way pipe 206 is used to supply air to the lower cylinder 105 in one stage; when the air supply pipe 202 is a straight pipe, the second and third pipes of the first three-way pipe 205 are used to supply air to the lower cylinder 105 in two stages, and the third pipe of the second three-way pipe 206 is used to supply air to the upper cylinder 103 in one stage.

[0058] By using the first three-way pipe 205 and the second three-way pipe 206 in combination, the medium-pressure gaseous refrigerant entering the gas supply pipe 202 from the gas supply receiver 2 can be divided into three paths. One path enters the upper cylinder head 102, intermediate plate 104, or lower cylinder head 106 through the third pipe of the second three-way pipe 206. The other two paths enter one of the upper cylinder head 102, intermediate plate 104, or lower cylinder head 106 simultaneously through the second and third pipes of the first three-way pipe 205. Since the first three-way pipe 205 and the second three-way pipe 206 are respectively connected to any two of the upper cylinder head 102, intermediate plate 104, or lower cylinder head 106, if the second and third pipes of the first three-way pipe 205 provide two-stage gas supply to the upper cylinder 103, then the third pipe of the second three-way pipe 206 provides one-stage gas supply to the lower cylinder 105. If the second and third pipes of the second three-way pipe 206 provide one-stage air replenishment to the upper cylinder 103, specifically, when the air replenishment pipe 202 is a bent pipe (such as a U-shaped pipe), if the second and third pipes of the first three-way pipe 205 provide two-stage air replenishment to the upper cylinder 103 on the upper cylinder head 102, then the third pipe of the second three-way pipe 206 can provide one-stage air replenishment to the lower cylinder 105 on the intermediate plate 104 or the lower cylinder head 106. The first three-way pipe 205 provides two-stage air replenishment to the upper cylinder 103 on the intermediate plate 104. The third pipe of the second three-way pipe 206 provides one-stage air replenishment to the lower cylinder 105 on the lower cylinder head 106. When the air replenishment pipe 202 is a straight pipe, if the second and third pipes of the first three-way pipe 205 provide two-stage air replenishment to the lower cylinder 105 on the intermediate plate 104, then the third pipe of the second three-way pipe 206 provides one-stage air replenishment to the upper cylinder 103 on the upper cylinder head 102. (See...) Figures 9-12 If the second and third pipes of the first three-way pipe 205 provide two-stage air supply to the lower cylinder 105 on the lower cylinder head 106, then the third pipe of the second three-way pipe 206 provides one-stage air supply to the upper cylinder 103 on the upper cylinder head 102 or the intermediate plate 104.

[0059] Preferably, the third pipe of the second three-way pipe 206 is connected to one end of the third exhaust pipe 207, and the other end of the third exhaust pipe 207 is used to connect to the third injection hole 109 in the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106, see... Figures 8-11 .

[0060] In one embodiment,

[0061] The air-fuel reservoir 2 also includes a four-way pipe 208. The first end of the four-way pipe 208 is connected to the other end of the air-fuel pipe 202. The second end of the four-way pipe 208 is connected to the first end of the first three-way pipe 205. The third and fourth ends of the four-way pipe 208 are simultaneously used to connect to one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. Furthermore, the first three-way pipe 205 and the four-way pipe 208 are respectively used to connect to any two of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. (See...) Figures 13-17 If the second and third pipes of the first three-way pipe 205 are used to replenish the upper cylinder 103 in two stages, then the third and fourth pipes of the four-way pipe 208 are used to replenish the lower cylinder 105 in two stages.

[0062] When the air supply pipe 202 is a bent pipe (such as a U-shaped pipe), the second and third pipes of the first tee pipe 205 are used to supply air to the upper cylinder 103 in two stages, and the third and fourth pipes of the four-way pipe 208 are used to supply air to the lower cylinder 105 in two stages; when the air supply pipe 202 is a straight pipe, the second and third pipes of the first tee pipe 205 are used to supply air to the lower cylinder 105 in two stages, and the third and fourth pipes of the four-way pipe 208 are used to supply air to the upper cylinder 103 in two stages.

[0063] In this way, by using the first three-way pipe 205 and the four-way pipe 208 together, the medium-pressure gaseous refrigerant entering the gas supply pipe 202 from the gas supply receiver 2 can be divided into four paths. Two of these paths enter one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106 simultaneously through the third and fourth pipes of the four-way pipe 208. The other two paths enter one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106 simultaneously through the second and third pipes of the first three-way pipe 205. In one of the six components, since the first three-way pipe 205 and the four-way pipe 208 are respectively connected to any two of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106, if the second and third pipes of the first three-way pipe 205 provide two-stage air supply to the upper cylinder 103, then the third and fourth pipes of the four-way pipe 208 provide two-stage air supply to the lower cylinder 105. If the third and fourth pipes of the four-way pipe 208 provide two-stage air replenishment to the upper cylinder 103, specifically, when the air replenishment pipe 202 is a bent pipe (such as a U-shaped pipe), if the second and third pipes of the first three-way pipe 205 provide two-stage air replenishment to the upper cylinder 103 on the upper cylinder head 102, then the third and fourth pipes of the four-way pipe 208 can provide two-stage air replenishment to the lower cylinder 105 on the intermediate plate 104 or the lower cylinder head 106. The three-way pipe provides two-stage air supply to the upper cylinder 103 on the intermediate plate 104. Similarly, the third and fourth pipes of the four-way pipe 208 provide two-stage air supply to the lower cylinder 105 on the lower cylinder head 106. When the air supply pipe 202 is a straight pipe, if the second and third pipes of the first three-way pipe 205 provide two-stage air supply to the lower cylinder 105 on the intermediate plate 104, then the third and fourth pipes of the four-way pipe 208 provide two-stage air supply to the upper cylinder 103 on the upper cylinder head 102. (See...) Figures 14-17 If the second and third pipes of the first three-way pipe 205 provide two-stage air supply to the lower cylinder 105 on the lower cylinder head 106, then the third and fourth pipes of the four-way pipe 208 provide two-stage air supply to the upper cylinder 103 on the upper cylinder head 102 or the intermediate plate 104.

[0064] In this configuration, the third pipe of the four-way pipe 208 is connected to one end of the fourth exhaust pipe 209, and the other end of the fourth exhaust pipe 209 is used to connect to the fourth injection hole 1010 in the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. The fourth pipe of the four-way pipe 208 is connected to one end of the fifth exhaust pipe 2010, and the other end of the fifth exhaust pipe 2010 is used to connect to the fifth injection hole 1011 in the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. (See...) Figures 13-16 .

[0065] Preferably, the axes of the first and second pipes in the four-way pipe 208 coincide, and the axes of the third and fourth pipes in the four-way pipe 208 are in the same plane and form a second included angle. The range of the second included angle is used to adjust according to the positional relationship between the fourth injection hole 1010 and the fifth injection hole 1011. The plane containing the axes of the third and fourth pipes in the four-way pipe 208 is perpendicular to the plane containing the axes of the first and second pipes. The fourth exhaust pipe 209 and the fifth exhaust pipe 2010 are both bends. The other end of the fourth exhaust pipe 209 is used to pass through the housing 101 and communicate with the fourth injection hole 1010. The other end of the fifth exhaust pipe 2010 is used to pass through the housing 101 and communicate with the fifth injection hole 1011. See Figures 13-16 The axes of the other ends of the fourth vent pipe 209 and the fifth vent pipe 2010 are perpendicular to the tangential plane of the outer peripheral surface at the corresponding position of the housing 101.

[0066] In this invention, the fourth injection hole 1010 and the fifth injection hole 1011 are not connected to each other. The fourth injection hole 1010 and the fifth injection hole 1011 are distributed at different positions in one of the upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106. By designing the axes of the third pipe and the fourth pipe in the four-way pipe 208 to be in the same plane and forming a second included angle, and designing the range of the second included angle to be adjusted according to the positional relationship between the fourth injection hole 1010 and the fifth injection hole 1011, the third pipe of the four-way pipe 208 can be easily connected to the fourth injection hole 1010 through the fourth exhaust pipe 209, and the fourth pipe of the four-way pipe 208 can be easily connected to the fifth injection hole 1011 through the fifth exhaust pipe 2010.

[0067] In addition, since both the fourth vent pipe 209 and the fifth vent pipe 2010 are bent pipes, the axes of the other ends of the fourth vent pipe 209 and the fifth vent pipe 2010 are perpendicular to the tangential plane of the outer peripheral surface of the corresponding position of the housing 101. Thus, the other ends of the fourth vent pipe 209 and the fifth vent pipe 2010 pass perpendicularly through the housing 101.

[0068] like Figure 18 As shown, a refrigeration cycle system of a rotary twin-cylinder compressor includes an intake receiver 3, a compressor 1, a condenser 4, a throttling device 5, an economizer 6, and an evaporator 7. The compressor 1 includes a housing 101, and a compressor unit is provided inside the housing 101. The compressor unit includes an upper cylinder head 102, an upper cylinder 103, an intermediate plate 104, a lower cylinder 105, and a lower cylinder head 106 arranged sequentially from top to bottom. An upper blade groove is provided on the inner wall of the upper cylinder 103 along the axial direction, and a lower blade groove is provided on the inner wall of the lower cylinder 105 along the axial direction. The center line of the orthographic projection of the upper blade groove coincides with the center line of the orthographic projection of the lower blade groove. The crankshaft 1012 of the compressor 1 passes through the upper cylinder head 102, the upper cylinder 103, the intermediate plate 104, the lower cylinder 105, and the lower cylinder head 106 in sequence.

[0069] It also includes the aforementioned rotary twin-cylinder compressor gas-injection liquid receiver, the outlet of the gas-injection liquid receiver 3 is connected to the suction port of the compressor 1, the discharge port of the compressor 1 is connected to the inlet of the condenser 4, the outlet of the condenser 4 is connected to the inlet of the throttling device 5, the outlet of the throttling device 5 is connected to the inlet of the economizer 6, the medium-pressure gas outlet of the economizer 6 is connected to the inlet of the gas-injection liquid receiver 2, the low-pressure liquid outlet of the economizer 6 is connected to the inlet of the evaporator 7, and the outlet of the evaporator 7 is connected to the inlet of the gas-injection liquid receiver 3.

[0070] The upper cylinder head 102, the intermediate plate 104, or the lower cylinder head 106 are provided with a first air supply channel 1013, a second air supply channel 1014, a first injection hole 108, and a second injection hole 107. One end of the first air supply channel 1013 is connected to the second pipe of the first three-way pipe 205, and the other end of the first air supply channel 1013 is connected to the first injection hole 108. One end of the second air supply channel 1014 is connected to the third pipe of the first three-way pipe 205, and the other end of the second air supply channel 1014 is connected to the second injection hole 107. Figure 4 and Figure 5 .

[0071] Thus, through the setting of the first gas supply channel 1013, the medium-pressure gaseous refrigerant entering the second pipe of the first three-way pipe 205 can sequentially enter the upper cylinder 103 or the lower cylinder 105 through the first gas supply channel 1013 and the first injection hole 108. Through the setting of the second gas supply channel 1014, the medium-pressure gaseous refrigerant entering the third pipe of the first three-way pipe 205 can sequentially enter the upper cylinder 103 or the lower cylinder 105 through the second gas supply channel 1014 and the second injection hole 107.

[0072] The refrigeration cycle of the refrigeration system is as follows: Low-temperature, low-pressure gaseous refrigerant enters the compressor 1 through the inlet receiver 3. In the upper cylinder 103 and lower cylinder 105 of the compressor 1, it is compressed into high-temperature, high-pressure gaseous refrigerant. After entering the condenser 4 for heat exchange, it becomes high-pressure liquid refrigerant. After passing through the throttling device 5, it becomes medium-temperature, medium-pressure gaseous refrigerant and low-temperature, low-pressure liquid refrigerant. After passing through the economizer 6, the medium-pressure gaseous refrigerant enters the gas replenishment receiver 2. The medium-pressure gaseous refrigerant in the gas replenishment receiver 2 then enters the upper cylinder 103 and / or lower cylinder 105 of the compressor 1. By increasing the cooling capacity, the energy efficiency ratio of the compressor 1 is improved to achieve the effect of gas replenishment and enthalpy increase, thereby improving the performance of the compressor 1. The liquid refrigerant enters the evaporator 7 for heat exchange and becomes low-temperature, low-pressure gaseous refrigerant, and then enters the inlet receiver 3 to realize the refrigeration cycle.

[0073] In one embodiment, the line connecting the orthographic projection center of the first injection hole 108 with the orthographic projection of the axis of the intermediate plate 104 is called the first injection hole auxiliary line 1015; the line connecting the orthographic projection center of the second injection hole 107 with the orthographic projection of the axis of the intermediate plate 104 is called the second injection hole auxiliary line 1016; the orthographic projection centerline of the upper blade groove and the orthographic projection centerline of the lower blade groove are both called blade groove auxiliary lines 1017; the angle between the first injection hole auxiliary line 1015 and the blade groove auxiliary line 1017 is called the first injection hole position angle θ1; and the angle between the second injection hole auxiliary line 1016 and the blade groove auxiliary line 1017 is called the second injection hole position angle θ2. Figure 4 and Figure 5 The position angles θ1 and θ2 of the first injection hole are both controlled between 60 and 150°, with both the first injection hole position angles θ1 and θ2 being close to the exhaust side.

[0074] For the case where both the first injection hole 108 and the second injection hole 107 are located within the intermediate plate 104, with the first injection hole 108 facing the upper cylinder 103 and communicating with it, and the second injection hole 107 facing the lower cylinder 105 and communicating with it:

[0075] The reason for controlling the position angle of the first injection hole 108 between 60-150° is that if the position angle is less than 60°, the first injection hole 108 will be close to the sliding vane in the upper blade groove of the upper cylinder 103. The gas pressure near the sliding vane in the upper cylinder 103 is higher than the gas pressure further away. The medium-pressure gaseous refrigerant injected into the upper cylinder 103 through the first injection hole 108 will enter the area with higher gas pressure within the upper cylinder 103. If the pressure of the medium-pressure gaseous refrigerant injected into the upper cylinder 103 is lower than the gas pressure in the area with higher gas pressure within the upper cylinder 103, then under the effect of the gas pressure difference, a large amount of injected gas may flow back through the first injection hole. The refrigerant flowing out of the upper cylinder 103 through channel 1013 and into the gas reservoir 2 causes a decrease in the performance of the compressor 1. If the position angle of the first injection hole is greater than 150°, the first injection hole 108 will be far away from the vane in the upper blade groove of the upper cylinder 103. The medium-pressure gaseous refrigerant injected into the upper cylinder 103 through the first injection hole 108 will enter the area with lower gas pressure in the upper cylinder 103. If the pressure of the medium-pressure gaseous refrigerant injected into the upper cylinder 103 is greater than the gas pressure in the area with lower gas pressure in the upper cylinder 103, under the action of gas pressure difference, a large amount of suction backflow may flow out of the upper cylinder 103 through the suction hole of the upper cylinder 103 and into the intake reservoir 3, which will also cause a decrease in the performance of the compressor 1.

[0076] Similarly, the reason for controlling the position angle of the second injection hole 107 between 60-150° is that if the position angle of the second injection hole is less than 60°, the second injection hole 107 will be close to the sliding vane in the lower blade groove of the lower cylinder 105. The gas pressure near the sliding vane in the lower cylinder 105 is higher than the gas pressure further away from the sliding vane. The medium-pressure gaseous refrigerant injected into the lower cylinder 105 through the second injection hole 107 will enter the area with higher gas pressure within the lower cylinder 105. If the pressure of the medium-pressure gaseous refrigerant injected into the lower cylinder 105 is lower than the gas pressure in the area with higher gas pressure within the lower cylinder 105, then under the effect of the gas pressure difference, a large amount of injected gas may flow back through the second injection hole. The gas flows out of the lower cylinder 105 through the gas passage 1014 and into the gas reservoir 2, causing a decrease in the performance of the compressor 1. If the position angle of the second injection hole is greater than 150°, the second injection hole 107 will be far away from the vane in the lower blade slot of the lower cylinder 105. The medium-pressure gaseous refrigerant injected into the lower cylinder 105 through the second injection hole 107 will enter the area with lower gas pressure in the lower cylinder 105. If the pressure of the medium-pressure gaseous refrigerant injected into the lower cylinder 105 is greater than the gas pressure in the area with lower gas pressure in the lower cylinder 105, under the action of gas pressure difference, a large amount of suction backflow may flow out of the lower cylinder 105 through the suction hole of the lower cylinder 105 and into the intake reservoir 3, which will also cause a decrease in the performance of the compressor 1.

[0077] In this invention, the closer the position angle of the first injection hole and the position angle of the second injection hole are to the midpoint of 60-150° (105°), the better the effect of replenishing air to the upper cylinder 103 through the first injection hole 108, and the better the effect of replenishing air to the lower cylinder 105 through the second injection hole 107.

[0078] Among them, such as Figures 4-6 As shown, the first injection hole 108 and the second injection hole 107 are both disposed in the intermediate plate 104. The first injection hole 108 faces the upper cylinder 103 and is connected to the upper cylinder 103, and the second injection hole 107 faces the lower cylinder 105 and is connected to the lower cylinder 105. The position angle of the first injection hole is denoted as θ1, and the position angle of the second injection hole is denoted as θ2. Both θ1 and θ2 are 105°. The first air supply channel 1013 is divided into two sections. The section of the first air supply channel 1013 that is directly connected to the first air outlet pipe 203 is the first horizontal straight pipe section 101301, and the section that is directly connected to the first injection hole 108 is the first inclined pipe section 101302. The second air supply channel 1014 is divided into two sections. The section of the second air supply channel 1014 that is directly connected to the second air outlet pipe 204 is the second horizontal straight pipe section 101401, and the section that is directly connected to the second injection hole 107 is the second inclined pipe section 101402.

[0079] This design improves the air supply effect of replenishing the upper cylinder 103 through the first injection hole 108, and also improves the air supply effect of replenishing the lower cylinder 105 through the second injection hole 107. Furthermore, by designing both the first air supply channel 1013 and the second air supply channel 1014 as two-section structures, it ensures that the position angle of the first injection hole 108 and the position angle of the second injection hole 107 within the intermediate plate 104 are both 105°, and also ensures that the first injection hole 108 and the second injection hole 107 are not connected to each other.

[0080] The position angle of the first injection hole is denoted as θ1, see... Figure 4 The position angle of the second injection hole is denoted as θ2, see... Figure 5 The diameter of the first injection hole 108 is denoted as d1, and the diameter of the second injection hole 107 is denoted as d2, and θ1<θ2, d1≥d2.

[0081] In the case where both the first injection hole 108 and the second injection hole 107 are located within the intermediate plate 104, with the first injection hole 108 facing the upper cylinder 103 and communicating with it, and the second injection hole 107 facing the lower cylinder 105 and communicating with it, since θ1 < θ2, the second injection hole 107 is further away from the corresponding vane compared to the first injection hole 108. Therefore, the medium-pressure gaseous refrigerant supplied to the lower cylinder 105 through the second injection hole 107 will enter the relatively low-pressure area within the lower cylinder 105, while the refrigerant supplied to the upper cylinder through the first injection hole 108 will... The medium-pressure gaseous refrigerant in cylinder 103 will enter the area with relatively high gas pressure in the upper cylinder 103. Therefore, compared with the first injection hole 108, the medium-pressure gaseous refrigerant supplied to the lower cylinder 105 through the second injection hole 107 is more affected by the suction backflow. By designing the orifice diameter d2 of the second injection hole 107 to be smaller than the orifice diameter d1 of the first injection hole 108, the amount of medium-pressure gaseous refrigerant supplied to the lower cylinder 105 through the second injection hole 107 can be reduced, thereby reducing the impact of suction backflow on the medium-pressure gaseous refrigerant supplied to the lower cylinder 105 through the second injection hole 107.

[0082] Preferably, d1 is controlled between 1mm and 2mm, and d2 is controlled between 1mm and 1.5mm.

[0083] In one embodiment, if both the first injection hole 108 and the second injection hole 107 are located within the upper cylinder head 102, then both the first injection hole 108 and the second injection hole 107 are connected to the upper cylinder 103; if both the first injection hole 108 and the second injection hole 107 are located within the lower cylinder head 106, then both the first injection hole 108 and the second injection hole 107 are connected to the lower cylinder 105; if both the first injection hole 108 and the second injection hole 107 are located within the intermediate plate 104, then the first injection hole 108 is connected to the upper cylinder 103, and the second injection hole 107 is connected to the lower cylinder 105. Figures 4-6 Alternatively, the first injection port 108 may be connected to the lower cylinder 105, and the second injection port 107 may be connected to the upper cylinder 103, or both the first injection port 108 and the second injection port 107 may be connected to the upper cylinder 103 or both may be connected to the lower cylinder 105.

[0084] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A gas-replenishing liquid receiver for a rotary twin-cylinder compressor, wherein the compressor (1) includes a housing (101), and the housing (101) is provided with an upper cylinder cover (102), an upper cylinder (103), an intermediate plate (104), a lower cylinder (105), and a lower cylinder cover (106); characterized in that: The gas reservoir (2) includes a cylinder (201), a gas supply pipe (202), and a first three-way pipe (205). One end of the gas supply pipe (202) is inside the cylinder (201), and the other end extends out of the cylinder (201) and is connected to the first pipe of the first three-way pipe (205). The axes of the second and third pipes in the first three-way pipe (205) are in the same plane and form a first angle. The second and third pipes of the first three-way pipe (205) are used to connect to one of the upper cylinder head (102), the intermediate plate (104), or the lower cylinder head (106). If the first three-way pipe (205) is used to connect to the upper cylinder head (102), then the upper cylinder (103) is given double air supply. If the first three-way pipe (205) is used to connect to the intermediate plate (104), then the upper cylinder (103) or the lower cylinder (105) is given double air supply. Alternatively, the upper cylinder (103) and the lower cylinder (105) are given air supply separately. If the first three-way pipe (205) is used to connect to the lower cylinder head (106), then the lower cylinder (105) is given double air supply.

2. The gas-replenishing liquid receiver for a rotary twin-cylinder compressor according to claim 1, characterized in that: It also includes a first exhaust pipe (203) and a second exhaust pipe (204). One end of the first exhaust pipe (203) is connected to the second pipe of the first three-way pipe (205), and one end of the second exhaust pipe (204) is connected to the third pipe of the first three-way pipe (205). The other end of the first exhaust pipe (203) is used to connect to the first injection hole (108) in the upper cylinder head (102), the intermediate plate (104) or the lower cylinder head (106), and the other end of the second exhaust pipe (204) is used to connect to the second injection hole (107) in the upper cylinder head (102), the intermediate plate (104) or the lower cylinder head (106). The first exhaust pipe (203) and the second exhaust pipe (204) are used to connect to one of the upper cylinder head (102), the intermediate plate (104) or the lower cylinder head (106).

3. A gas-replenishing liquid receiver for a rotary twin-cylinder compressor according to claim 2, characterized in that: The range of the first included angle is used to adjust according to the positional relationship between the first injection hole (108) and the second injection hole (107); the plane containing the axis of the second and third pipes in the first three-way pipe (205) is perpendicular to the plane containing the axis of the first pipe; the first air outlet pipe (203) and the second air outlet pipe (204) are both bent pipes, the other end of the first air outlet pipe (203) is used to pass through the housing (101) and communicate with the first injection hole (108), the other end of the second air outlet pipe (204) is used to pass through the housing (101) and communicate with the second injection hole (107), and the axis of the other end of the first air outlet pipe (203) and the second air outlet pipe (204) is perpendicular to the tangential plane of the outer peripheral surface of the housing (101) at the corresponding position.

4. The gas-replenishing liquid receiver for a rotary twin-cylinder compressor according to claim 1, characterized in that: It also includes a second three-way pipe (206), the first end of which is connected to the other end of the air injection pipe (202), the second end of which is connected to the first end of the first three-way pipe (205), and the third end of which is used to connect to the upper cylinder head (102), the intermediate plate (104), or the lower cylinder head (106), and the first three-way pipe (205) and the second three-way pipe (206) are respectively used to connect to the upper cylinder head (102), the intermediate plate (104), or the lower cylinder head (106). 4) or any two of the lower cylinder head (106) are connected; if the second and third pipes of the first three-way pipe (205) are used to provide two-stage air replenishment to the upper cylinder (103), then the third pipe of the second three-way pipe (206) is used to provide one-stage air replenishment to the lower cylinder (105).

5. A gas-replenishing liquid receiver for a rotary twin-cylinder compressor according to claim 4, characterized in that: The third pipe of the second three-way pipe (206) is connected to one end of the third exhaust pipe (207), and the other end of the third exhaust pipe (207) is used to connect to the third injection hole (109) in the upper cylinder head (102), the intermediate plate (104) or the lower cylinder head (106).

6. A gas-replenishing liquid receiver for a rotary twin-cylinder compressor according to claim 1, characterized in that: It also includes a four-way pipe (208), the first end of which is connected to the other end of the air injection pipe (202), the second end of which is connected to the first end of the first three-way pipe (205), and the third and fourth ends of which are used to connect to one of the upper cylinder head (102), the intermediate plate (104), or the lower cylinder head (106), and the first three-way pipe (205) and the four-way pipe (208) are used to connect to the upper cylinder head (102), the intermediate plate (104), or the lower cylinder head (106), respectively. 4) or any two of the lower cylinder head (106) are connected; if the second and third pipes of the first three-way pipe (205) are used to provide two-stage air replenishment to the upper cylinder (103), then the third and fourth pipes of the four-way pipe (208) are used to provide two-stage air replenishment to the lower cylinder (105).

7. A gas-replenishing liquid receiver for a rotary twin-cylinder compressor according to claim 6, characterized in that: The third pipe of the four-way pipe (208) is connected to one end of the fourth exhaust pipe (209), and the other end of the fourth exhaust pipe (209) is used to connect to the fourth injection hole (1010) in the upper cylinder head (102), the intermediate plate (104) or the lower cylinder head (106). The fourth pipe of the four-way pipe (208) is connected to one end of the fifth exhaust pipe (2010), and the other end of the fifth exhaust pipe (2010) is used to connect to the fifth injection hole (1011) in the upper cylinder head (102), the intermediate plate (104) or the lower cylinder head (106).

8. A gas-replenishing liquid receiver for a rotary twin-cylinder compressor according to claim 7, characterized in that: The axes of the first and second pipes in the four-way pipe (208) coincide, and the axes of the third and fourth pipes in the four-way pipe (208) are in the same plane and form a second included angle. The range of the second included angle is used to adjust according to the positional relationship between the fourth injection hole (1010) and the fifth injection hole (1011). The plane containing the axes of the third and fourth pipes in the four-way pipe (208) is perpendicular to the plane containing the axes of the first and second pipes. The fourth exhaust pipe (209) and the fifth exhaust pipe (2010) are both bent pipes. The other end of the fourth exhaust pipe (209) is used to pass through the housing (101) and communicate with the fourth injection hole (1010). The other end of the fifth exhaust pipe (2010) is used to pass through the housing (101) and communicate with the fifth injection hole (1011). The axes of the other ends of the fourth exhaust pipe (209) and the fifth exhaust pipe (2010) are both perpendicular to the tangential plane containing the outer peripheral surface of the corresponding position of the housing (101).

9. A refrigeration cycle system for a rotary twin-cylinder compressor, comprising an intake receiver (3), a compressor (1), a condenser (4), a throttling device (5), an economizer (6), and an evaporator (7), wherein the compressor (1) comprises a housing (101), and a compressor assembly is provided inside the housing (101), the compressor assembly comprising, from top to bottom, an upper cylinder cover (102), an upper cylinder (103), an intermediate plate (104), a lower cylinder (105), and a lower cylinder cover (106), wherein an upper blade groove is provided axially on the inner wall of the upper cylinder (103), and a lower blade groove is provided axially on the inner wall of the lower cylinder (105), the center line of the orthographic projection of the upper blade groove coincides with the center line of the orthographic projection of the lower blade groove, and the crankshaft (1012) of the compressor (1) passes sequentially through the upper cylinder cover (102), the upper cylinder (103), the intermediate plate (104), the lower cylinder (105), and the lower cylinder cover (106); characterized in that: It also includes a gas-replenishing liquid receiver for a rotary twin-cylinder compressor as described in any one of claims 1-8, wherein the outlet of the gas-replenishing liquid receiver (3) is connected to the suction port of the compressor (1), the discharge port of the compressor (1) is connected to the inlet of the condenser (4), the outlet of the condenser (4) is connected to the inlet of the throttling device (5), the outlet of the throttling device (5) is connected to the inlet of the economizer (6), the medium-pressure gas outlet of the economizer (6) is connected to the inlet of the gas-replenishing liquid receiver (2), the low-pressure liquid outlet of the economizer (6) is connected to the inlet of the evaporator (7), and the outlet of the evaporator (7) is connected to the inlet of the gas-replenishing liquid receiver (3). The upper cylinder head (102), the intermediate plate (104), or the lower cylinder head (106) is provided with a first air supply channel (1013), a second air supply channel (1014), a first injection hole (108), and a second injection hole (107). One end of the first air supply channel (1013) is connected to the second pipe of the first three-way pipe (205), and the other end of the first air supply channel (1013) is connected to the first injection hole (108). One end of the second air supply channel (1014) is connected to the third pipe of the first three-way pipe (205), and the other end of the second air supply channel (1014) is connected to the second injection hole (107).

10. The refrigeration cycle system of a rotary twin-cylinder compressor according to claim 9, characterized in that: The line connecting the orthographic projection center of the first injection hole (108) and the orthographic projection of the axis of the intermediate plate (104) is called the first injection hole auxiliary line (1015). The line connecting the orthographic projection center of the second injection hole (107) and the orthographic projection of the axis of the intermediate plate (104) is called the second injection hole auxiliary line (1016). The orthographic projection centerline of the upper blade groove and the orthographic projection centerline of the lower blade groove are both called blade groove auxiliary lines (1017). The angle between the first injection hole auxiliary line (1015) and the blade groove auxiliary line (1017) is called the first injection hole position angle. The angle between the second injection hole auxiliary line (1016) and the blade groove auxiliary line (1017) is called the second injection hole position angle. The first injection hole position angle and the second injection hole position angle are both controlled between 60-150°.

11. The refrigeration cycle system of a rotary twin-cylinder compressor according to claim 10, characterized in that: The first injection hole (108) and the second injection hole (107) are both disposed within the intermediate plate (104). The first injection hole (108) faces the upper cylinder (103) and communicates with it, while the second injection hole (107) faces the lower cylinder (105) and communicates with it. The first air supply channel (1013) is divided into two sections. The first air supply channel (1013) is directly connected to the first air outlet pipe (203). The first horizontal straight pipe section (101301) and the corresponding section directly connected to the first injection hole (108) are the first inclined pipe section (101302). The second air supply channel (1014) is divided into two sections. The corresponding section directly connected to the second air outlet pipe (204) in the second air supply channel (1014) is the second horizontal straight pipe section (101401), and the corresponding section directly connected to the second injection hole (107) is the second inclined pipe section (101402).

12. The refrigeration cycle system of a rotary twin-cylinder compressor according to claim 10, characterized in that: The position angle of the first injection hole is denoted as θ1, the position angle of the second injection hole is denoted as θ2, the diameter of the first injection hole (108) is denoted as d1, the diameter of the second injection hole (107) is denoted as d2, and θ1<θ2, d1≥d2.

13. The refrigeration cycle system of a rotary twin-cylinder compressor according to claim 12, characterized in that: d1 is controlled between 1mm and 2mm, and d2 is controlled between 1mm and 1.5mm.

14. The refrigeration cycle system of a rotary twin-cylinder compressor according to claim 9, characterized in that: If both the first injection hole (108) and the second injection hole (107) are located inside the upper cylinder head (102), then both the first injection hole (108) and the second injection hole (107) are connected to the upper cylinder (103); if both the first injection hole (108) and the second injection hole (107) are located inside the lower cylinder head (106), then both the first injection hole (108) and the second injection hole (107) are connected to the lower cylinder (105); if both the first injection hole (108) and the second injection hole (107) are located inside the lower cylinder head (106), then both the first injection hole (108) and the second injection hole (107) are connected to the lower cylinder (105); (107) If both are located in the middle plate (104), then the first injection hole (108) is connected to the upper cylinder (103), and the second injection hole (107) is connected to the lower cylinder (105), or the first injection hole (108) is connected to the lower cylinder (105), and the second injection hole (107) is connected to the upper cylinder (103), or both the first injection hole (108) and the second injection hole (107) are connected to the upper cylinder (103) or both are connected to the lower cylinder (105).

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