Compressors and refrigeration equipment

Abstract

The present invention discloses a compressor and a refrigeration device. The compressor comprises: a first compression chamber, a second compression chamber, an exhaust port, a variable capacity mechanism, an air intake port, an air supply port and a pressure signal interface. The air intake port of the compressor is connected to the inlet of the first compression chamber, and the air supply port of the compressor is connected to the inlet of the second compression chamber. The gases compressed in the first compression chamber and the second compression chamber are both discharged into the interior of the compressor housing and then discharged through the exhaust port. The volume of the first compression chamber is more than twice the volume of the second compression chamber. The variable capacity mechanism is arranged in the first compression chamber and / or the second compression chamber, and the variable capacity mechanism is connected to the pressure signal interface. Therefore, by arranging the variable capacity mechanism on the first compression chamber and / or the second compression chamber, the refrigeration device can be operated under a higher energy efficiency condition, thereby improving the energy efficiency of the refrigeration device.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration, and in particular to a compressor and a refrigeration device having the compressor. Background Art

[0002] In the related art, the volumes of the first compression chamber and the second compression chamber in the compressor remain unchanged. When the compressor works under different working conditions, the load operation of the compressor is constant, which can easily lead to a waste of energy efficiency and insufficient energy efficiency.

[0003] Generally speaking, the bypass hole of the bypass variable volume is usually set on the cylinder wall. Since the inner wall of the cylinder is round, in order to reduce the clearance volume, it is necessary to manufacture a plunger plugging part of the corresponding shape to reduce performance loss. If it is set on a bearing or partition, the corresponding plunger structure is simple and easy to manufacture, and at the same time has higher performance! Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a compressor, which can improve the energy efficiency of a refrigeration device.

[0005] The invention also discloses a refrigeration device.

[0006] The compressor according to the present invention comprises: a first compression chamber, a second compression chamber, an exhaust port, a variable capacity mechanism, an air intake port, an air supply port and a pressure signal interface, wherein the air intake port of the compressor is connected to the inlet of the first compression chamber, the air supply port of the compressor is connected to the inlet of the second compression chamber, the gas compressed by the first compression chamber and the second compression chamber is discharged into the compressor housing and then discharged through the exhaust port, the volume of the first compression chamber is more than twice the volume of the second compression chamber, the variable capacity mechanism is arranged in the first compression chamber and / or the second compression chamber, the The variable capacity mechanism is connected to the pressure signal interface, and the variable capacity mechanism is a plunger variable capacity mechanism. The plunger variable capacity mechanism includes: a blocking member, a bypass hole, a bypass channel and a pressure signal receiving end. The blocking member selectively blocks the bypass hole, and the bypass channel is connected to the bypass hole. The bypass channel is also connected to the inlet of the compression chamber where the corresponding plunger is located. The pressure signal receiving end is connected to the pressure signal interface, and the bypass hole is arranged on the upper bearing, the lower bearing or the middle partition of the compressor. The intake pressure of the second compression chamber is greater than the intake pressure of the first compression chamber.

[0007] According to the compressor of the present invention, by arranging a variable capacity mechanism on the first compression chamber and / or the second compression chamber, the refrigeration device can be operated under a higher energy efficiency condition, thereby improving the energy efficiency of the refrigeration device.

[0008] Specifically, when the variable capacity mechanism is only provided at the first compression chamber, the full load operation volume of the first compression chamber is V1, the partial load operation volume of the first compression chamber is V1', and the volume of the second compression chamber is V2, then V2 = (2% - 20%) V1; V1' = (30% - 60%) V1.

[0009] Optionally, when the variable capacity mechanism is only provided at the second compression chamber, the operating volume of the first compression chamber is V1, the partial load operating volume of the second compression chamber is V2', and the full load volume of the second compression chamber is V2, then V2 = (15% - 40%) V1; V2' = (4% - 15%) V1.

[0010] Furthermore, when the variable capacity mechanism is only arranged at the first compression chamber and the second compression chamber, the full-load operating volume of the first compression chamber is V1, the partial-load operating volume of the first compression chamber is V1', the volume of the second compression chamber is V2, and the partial-load operating volume of the second compression chamber is V2', then V2'=(4%-15%)V1'; V2=(15%-40%)V1; V1=(110-140)%V1'.

[0011] The refrigeration device according to the present invention includes the above-mentioned compressor, condenser, evaporator, and economizer; the air intake port of the compressor is connected to the outlet of the evaporator, the air supply port of the compressor is connected to the economizer, and the economizer is also connected to the condenser and the evaporator respectively.

[0012] Optionally, the refrigeration device includes a pressure-leading pipeline, a control valve, a high-pressure pipeline interface, a low-pressure pipeline interface, an exhaust pipeline of a compressor, and an intake pipeline of a compressor; the control valve is connected to the compressor pressure signal interface, the high-pressure pipeline interface, and the low-pressure pipeline interface respectively through the pressure-leading pipeline, and the pressure signal interface of the compressor is selectively connected to the high-pressure pipeline interface or the low-pressure interface through the control valve; the high-pressure pipeline interface is arranged on the housing of the compressor, the exhaust pipeline of the compressor, the condenser and its connecting pipeline; the low-pressure pipeline interface is arranged on the intake pipeline of the compressor, the evaporator and its connecting pipeline.

[0013] Furthermore, the control valve is a three-way valve, a four-way valve or two on-off valves.

[0014] Specifically, when both compression chambers of the compressor are controlled by variable capacity mechanisms, one control valve is used to control the two compression chambers so that the two compression chambers are simultaneously in a full-load working state or a partial-load working state; or two control valves are used to separately control the variable capacity mechanisms so that the two compression chambers are respectively in a full-load working state or a partial-load working state as required. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of a refrigeration device in which a variable capacity mechanism is arranged on a first compression chamber according to an embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of a refrigeration device in which a variable capacity mechanism is arranged on a second compression chamber according to an embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of a refrigeration device in which a variable capacity mechanism is simultaneously arranged on a first compression chamber and a second compression chamber according to an embodiment of the present invention;

[0018] Figure 4 is a schematic diagram of a compressor of a refrigeration device according to an embodiment of the present invention as a single cooling machine;

[0019] Figure 5 is a schematic diagram of a compressor of a refrigeration device according to an embodiment of the present invention being a single heat engine;

[0020] Figure 6 is a schematic diagram of an economizer of a refrigeration device according to an embodiment of the present invention being a heat exchanger type;

[0021] Figure 7 is a schematic diagram of a compressor of a refrigeration device according to an embodiment of the present invention as a cooling and heating machine;

[0022] Figure 8 It is a schematic diagram of using one control valve to control the first compression chamber and the second compression chamber or using two control valves to independently control the variable capacity mechanism of the refrigeration device according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Refrigeration device 10;

[0025] Compressor 1; first compression chamber 11; second compression chamber 12; exhaust port 13;

[0026] Variable capacity mechanism 14; pressure signal receiving end 141;

[0027] Liquid reservoir 15;

[0028] Four-way valve 2; first interface 21; second interface 22; third interface 23; fourth interface 24;

[0029] Outdoor heat exchanger 3; indoor heat exchanger 4; economizer 5; throttling element 6;

[0030] Three-way valve 7; pressure signal interface 71;

[0031] One-way valve 8. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Reference below Figure 1-Figure 8 The refrigeration device 10 according to the embodiment of the present invention will be described in detail.

[0036] like Figure 1-Figure 3 As shown, a refrigeration device 10 according to an embodiment of the present invention is characterized in that it includes: a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 4, an economizer 5, and a throttling element 6. The compressor 1 may include: a first compression chamber 11, a second compression chamber 12, an exhaust port 13, a variable volume mechanism 14, an air intake port, an air replenishment port and a pressure signal interface 71. A liquid reservoir 15 is provided on the air intake port of the compressor 1. The gas compressed by the first compression chamber 11 and the second compression chamber 12 is discharged into the interior of the compressor 1 shell. The liquid reservoir 15 is connected to the inlet of the first compression chamber 11, that is, the liquid reservoir 15 is communicated with the first compression chamber 11.

[0037] In addition, the four-way valve 2 has first to fourth interfaces 24, which are the first interface 21, the second interface 22, the third interface 23 and the fourth interface 24, respectively. The first interface 21 is connected to the outdoor heat exchanger 3, the second interface 22 is connected to the indoor heat exchanger 4, the third interface 23 is connected to the air intake port, and the fourth interface 24 is connected to the exhaust port 13. The economizer 5 and the throttling element 6 are connected between the outdoor heat exchanger 3 and the indoor heat exchanger 4. The economizer 5 is also connected to the inlet of the second compression chamber 12. Among them, the economizer 5 is divided into a gas-liquid separation type and a heat exchanger type. The gas-liquid separation type economizer is also called a gas-liquid separator, a flash evaporator, a flash evaporator, etc.

[0038] Among them, the air intake port of the compressor 1 is connected to the inlet of the first compression chamber 11, and the air supply port of the compressor 1 is connected to the inlet of the second compression chamber 12. The gases compressed by the first compression chamber 11 and the second compression chamber 12 are discharged into the interior of the compressor 1 shell and then discharged through the exhaust port 13. It should be noted that the gas can enter the first compression chamber 11 through the air intake port, and the gas in the second compression chamber 12 can be discharged to the outside of the second compression chamber 12 through the air supply port.

[0039] Among them, the volume of the first compression chamber 11 is more than twice the volume of the second compression chamber 12, and the variable capacity mechanism 14 is arranged in the first compression chamber 11 and / or the second compression chamber 12. It should be noted that the variable capacity mechanism 14 can be arranged alone in the first compression chamber 11, or can be arranged alone on the second compression chamber 12, or can be arranged on the first compression chamber 11 and the second compression chamber 12 at the same time. The variable capacity mechanism 14 can change the working volume of the first compression chamber 11 and the second compression chamber 12, and can realize the variable capacity operation of one of the first compression chamber 11 and the second compression chamber 12, or can realize the variable capacity operation of the first compression chamber 11 and the second compression chamber 12 at the same time, thereby meeting the working requirements of the refrigeration device 10 under different working conditions.

[0040] In addition, the variable capacity mechanism 14 is connected to the pressure signal interface 71, which can transmit the pressure signal to the variable capacity mechanism 14 and control the operation of the variable capacity mechanism 14 according to the pressure signal value, so that the first compression chamber 11 and the second compression chamber 12 can be more conveniently controlled to operate under different load conditions.

[0041] Furthermore, when the refrigeration device 10 is in the refrigeration process, the volume of the first compression chamber 11 and the second compression chamber 12 is adjusted by the variable volume mechanism 14, so that the first compression chamber 11 and the second compression chamber 12 can be operated at partial load or full load. Therefore, the load operation conditions of the first compression chamber 11 and the second compression chamber 12 can be adjusted according to the needs of actual work, so that the refrigeration device 10 can be operated under higher energy efficiency conditions, the energy efficiency of the refrigeration device 10 can be improved, thereby improving the working performance of the refrigeration device 10, and further improving user satisfaction.

[0042] Furthermore, the variable capacity mechanism 14 can be a plunger variable capacity mechanism 14, and the plunger variable capacity mechanism 14 can include: a blocking member, a bypass hole, a bypass channel and a pressure signal receiving end 141. The blocking member selectively blocks the bypass hole, and the bypass channel is connected to the bypass hole. The bypass channel is also connected to the inlet of the compression chamber where the corresponding plunger is located. That is to say, if the variable capacity mechanism 14 is arranged on the first compression chamber 11, the bypass channel is connected to the inlet of the first compression chamber 11. If the variable capacity mechanism 14 is arranged on the second compression chamber 12, the bypass channel is connected to the inlet of the second compression chamber 12. In this way, the variable capacity mechanism 14 can adjust the working requirements of the first compression chamber 11 and the second compression chamber 12.

[0043] And, if Figure 1-Figure 3 As shown, the pressure signal receiving end 141 is connected to the pressure signal interface 71, and the pressure signal receiving end 141 can receive the pressure signal transmitted by the pressure signal interface 71. The bypass hole is arranged on the upper bearing, the lower bearing or the middle partition of the compressor 1. Such arrangement can reduce the clearance volume and reduce gas leakage, thereby improving the performance of the refrigeration device 10. At the same time, because the shape is relatively regular, it can be easy to manufacture.

[0044] When the pressure signal receiving end 141 receives a high-pressure signal, the blocking member blocks the bypass hole, and the refrigerant in the first compression chamber 11 and the second compression chamber 12 cannot flow to the bypass channel through the bypass hole. At this time, the first compression chamber 11 and the second compression chamber 12 are in full-load operation. When the pressure signal receiving end 141 receives a low-pressure signal, the blocking member moves out of the bypass hole, and the refrigerant in the first compression chamber 11 and the second compression chamber 12 flows to the bypass channel through the bypass hole, and then the refrigerant flows back to the air intake port through the bypass channel. At this time, the first compression chamber 11 and the second compression chamber 12 are in partial-load operation, so that the load operation state of the first compression chamber 11 and the second compression chamber 12 can be automatically adjusted, thereby making the refrigeration device 10 more intelligent.

[0045] The specific structural features of the plunger variable capacity mechanism 14 are as follows: a bypass hole is opened on the lower bearing or the first partition of the plunger variable capacity mechanism 14, a plunger that can move along the axial direction of the plunger is arranged in the bypass hole, one end of the bypass hole is connected to the internal space of the first compression chamber 11 or the second compression chamber 12 corresponding to the variable capacity, the other end of the bypass hole is a pressure signal receiving end 141, the pressure signal receiving end 141 is connected to the pressure signal interface 71, a bypass channel is arranged on the bypass hole, one side of the bypass channel is connected to the bypass hole, and the other side is connected to the suction port of the second cylinder, and the bypass channel can be arranged inside the compressor 1 or outside the compressor 1. In addition, the variable capacity mechanism 14 can also be set as a variable capacity mechanism 14 that plays the same role as the plunger variable capacity mechanism 14.

[0046] Furthermore, the air intake pressure of the second compression chamber 12 is greater than the air intake pressure of the first compression chamber 11 . Such an arrangement can improve the working performance of the compressor 1 .

[0047] Optionally, the pressure signal interface 71 selectively connects the exhaust port 13 and the air intake port. The pressure signal interface 71 is configured in this way to connect and close the exhaust port 13 and the air intake port at any time, so that the first compression chamber 11 and the second compression chamber 12 can meet working requirements.

[0048] Alternatively, if Figure 1-Figure 3 As shown, the refrigeration device 10 may also include: a three-way valve 7, the three-way valve 7 is respectively connected to the exhaust port 13, the suction port of the compressor 1 and the pressure signal interface 71, the exhaust port 13 is a high-pressure interface, the suction port is a low-pressure interface, and the interface connecting the three-way valve 7 and the variable volume mechanism 14 serves as the pressure signal interface 71, that is, the three-way valve 7 is respectively connected to the exhaust port 13, the liquid reservoir 15 and the variable volume mechanism 14, wherein the three-way valve 7 can detect the pressure of the exhaust port 13 and the liquid reservoir 15, and can convert the detected pressure into a pressure signal and transmit it to the variable volume mechanism 14, and can control the operation of the variable volume mechanism 14 according to the pressure signal value, so that the first compression chamber 11 and the second compression chamber 12 can be more conveniently controlled to work under different load conditions.

[0049] Specifically, the compressor 1 may also include: two on-off valves, one on-off valve is arranged between the pressure signal interface 71 and the exhaust port 13, and the other on-off valve is arranged between the pressure signal interface 71 and the intake port. The exhaust port 13 is a high-pressure interface, and the intake port is a low-pressure interface. The two on-off valves can respectively control the connection and disconnection of the pressure signal interface 71 with the exhaust port 13 and the intake port. When the on-off valve between the pressure signal interface 71 and the exhaust port 13 is opened, the pressure signal interface 71 is connected with the exhaust port 13. When the on-off valve between the pressure signal interface 71 and the intake port is opened, the pressure signal interface 71 is connected with the intake port.

[0050] Specifically, Figure 1 As shown, when the variable capacity mechanism 14 is only provided at the first compression chamber 11, the full load operation volume of the first compression chamber 11 is V1, the partial load operation volume of the first compression chamber 11 is V1', and the volume of the second compression chamber 12 is V2, then V2 = (2%-20%) V1; V1' = (30%-60%) V1. The first compression chamber 11 can be operated at partial load, and the seasonal energy efficiency of the refrigeration device 10 can be improved, thereby improving the SEER (seasonal energy efficiency ratio) of the refrigeration device 10.

[0051] Among them, when the variable capacity mechanism 14 is only arranged at the first compression chamber 11, the constant speed machine adopts independent compression technology to improve SEER, and the constant speed machine adopts variable capacity technology to improve SEER. When the variable capacity mechanism 14 is arranged on the first compression chamber 11 of independent compression, the refrigeration device 10 using the constant speed compressor 1 can have both independent compression technology and variable capacity technology, thereby achieving the purpose of further improving SEER.

[0052] Furthermore, if Figure 2 As shown, when the variable capacity mechanism 14 is only arranged at the second compression chamber 12, the operating volume of the first compression chamber 11 is V1, the partial load operating volume of the second compression chamber 12 is V2', and the volume of the second compression chamber 12 is V2, then V2 = (15% - 40%) V1; V2' = (4% - 15%) V1. Such an arrangement enables the second compression chamber 12 to operate at full load during low temperature heating, thereby improving the low temperature heating capacity, and, in other working conditions, enables the second compression chamber 12 to operate at partial load, thereby achieving high performance operation, thereby improving the energy efficiency of the refrigeration device 10.

[0053] Furthermore, if Figure 3 As shown, when the variable capacity mechanism 14 is only arranged at the first compression chamber 11 and the second compression chamber 12, that is, the variable capacity mechanism 14 is arranged at the first compression chamber 11 and the second compression chamber 12 at the same time, the full load operation volume of the first compression chamber 11 is V1, the partial load operation volume of the first compression chamber 11 is V1', the volume of the second compression chamber 12 is V2, and the partial load operation volume of the second compression chamber 12 is V2', then V2'=(4%-15%)V1'; V2=(15%-40%)V1; V1=(110-140)%V1'. In low temperature heating, such an arrangement can make the first compression chamber 11 and the second compression chamber 12 realize full load operation at the same time, so that the refrigeration device 10 has a greater low temperature heating capacity. In other working conditions, the first compression chamber 11 and the second compression chamber 12 can enter partial load operation, so as to achieve higher energy efficiency. Among them, the setting position of the variable capacity mechanism 14 can be selected according to actual working requirements.

[0054] Specifically, Figure 1-Figure 3 As shown, there are two throttling elements 6, and the two throttling elements 6 are respectively connected to the two sides of the economizer 5. The throttling elements 6 have a throttling effect, can control the gas flow rate of the refrigeration device 10, and can achieve the effect of reducing the pressure.

[0055] Optionally, the compressor 1 may include: a first cylinder and a second cylinder, a first compression chamber 11 is formed in the first cylinder, and a second compression chamber 12 is formed in the second cylinder. Such an arrangement can enable the first compression chamber 11 and the second compression chamber 12 to better compress the gas, thereby further improving the working performance of the refrigeration device 10. At the same time, the first cylinder and the second cylinder can protect the first compression chamber 11 and the second compression chamber 12, thereby preventing the first compression chamber 11 and the second compression chamber 12 from being damaged, thereby improving the working reliability of the refrigeration device 10.

[0056] The refrigeration device 10 according to the embodiment of the present invention comprises the compressor 1 according to the above-mentioned embodiment of the present invention. The compressor 1 can enable the refrigeration device 10 to operate under a higher energy efficiency condition, thereby improving the energy efficiency of the refrigeration device 10.

[0057] Furthermore, the refrigeration device 10 may also include: a condenser, an evaporator and an economizer 5. The air intake port of the compressor 1 is connected to the evaporator outlet, the air supply port 13 of the compressor 1 is connected to the economizer 5, and the economizer 5 is also connected to the condenser and the evaporator respectively. Such an arrangement can ensure that the refrigeration device 10 meets the working requirements.

[0058] Specifically, the refrigeration device 10 may also include a pressure-leading pipeline, a control valve, a high-pressure pipeline interface, a low-pressure pipeline interface, an exhaust pipeline of the compressor 1, and an intake pipeline of the compressor 1; the control valve is connected to the pressure signal interface 71, the high-pressure pipeline interface, and the low-pressure pipeline interface of the compressor 1 through the pressure-leading pipeline, and the pressure signal interface 71 of the compressor 1 is selectively connected to the high-pressure pipeline interface or the low-pressure interface through the control valve; the high-pressure pipeline interface is arranged on the housing of the compressor 1, the exhaust pipeline of the compressor 1, the condenser and its connecting pipeline; the low-pressure pipeline interface is arranged on the intake pipeline of the compressor 1, the evaporator and its connecting pipeline. Such an arrangement can further improve the working performance of the refrigeration device 10.

[0059] Optionally, the control valve may be a three-way valve 7, a four-way valve 2 or two on-off valves. Such an arrangement can more conveniently control the first compression chamber 11 and the second compression chamber 12 to work under different load conditions.

[0060] Furthermore, if Figure 8 As shown, when the two compression chambers of the compressor 1 are both controlled by the variable capacity mechanism 14, one control valve is used to control the two compression chambers, that is, one control valve is used to control the first compression chamber 11 and the second compression chamber 12 together, so that the two compression chambers are in a full-load working state or a partial-load working state at the same time; or two control valves are used to separately control the variable capacity mechanism 14, so that the two compression chambers are in a full-load or partial-load working state according to needs, thereby further improving the working performance of the refrigeration device 10.

[0061] It should be noted that the refrigeration device 10 can be a cooling and heating machine, that is, a device with cooling and heating capabilities. Of course, the refrigeration device 10 can also omit the four-way valve 2. In this case, the refrigeration device 10 can be a single cooling machine or a single heating machine. Based on this, the compressor 1 of the above embodiment can actually be applicable to various types of refrigeration devices 10.

[0062] In addition, if Figure 4 As shown, the refrigeration device 10 can be a single cooling machine, that is, a device with refrigeration capacity. The single cooling machine can include: a compressor 1, a liquid storage device 15, an outdoor heat exchanger 3, an indoor heat exchanger 4, an economizer 5, a throttling element 6 and a three-way valve 7. Figure 5 As shown, the above-mentioned refrigeration device 10 can be a single heat machine, that is, a device with heating capability, and the single heat machine can include: a compressor 1, a liquid storage tank 15, an outdoor heat exchanger 3, an indoor heat exchanger 4, an economizer 5, a throttling element 6 and a three-way valve 7.

[0063] In addition, if Figure 6 As shown, the refrigeration device 10 is a single cooling machine, and the economizer 5 is a heat exchanger type. In this case, the single cooling machine may include: a compressor 1, a liquid storage tank 15, an outdoor heat exchanger 3, an indoor heat exchanger 4, an economizer 5, a throttling element 6 and a three-way valve 7, as shown in FIG. Figure 7 As shown, the refrigeration device 10 can be a cooling and heating machine, that is, a device with cooling and heating capabilities. The cooling and heating machine can include: a compressor 1, a liquid storage tank 15, a four-way valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 4, an economizer 5, a throttling element 6, a three-way valve 7 and four non-return valves 8. The economizer 5 is a heat exchanger type, and has four more non-return valves 8 than a single cooling machine.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A compressor, characterized in that: include: A first compression chamber, a second compression chamber, an exhaust port, a variable capacity mechanism, an air intake port, an air supply port and a pressure signal interface, the air intake port of the compressor is connected to the inlet of the first compression chamber, the air supply port of the compressor is connected to the inlet of the second compression chamber, the gas compressed by the first compression chamber and the second compression chamber is discharged into the compressor housing and then discharged through the exhaust port, the volume of the first compression chamber is more than twice the volume of the second compression chamber, the variable capacity mechanism is arranged in the first compression chamber and / or the second compression chamber, the variable capacity mechanism is connected to the pressure signal interface, the variable capacity mechanism is a plunger variable capacity mechanism, the plunger variable capacity mechanism includes: a blocking member, a bypass hole, a bypass channel and a pressure signal receiving end, the blocking member selectively blocks the bypass hole, the bypass channel is connected to the bypass hole, the bypass channel is also connected to the inlet of the corresponding compression chamber where the plunger is located, the pressure signal receiving end is connected to the pressure signal interface, the bypass hole is arranged on the upper bearing, the lower bearing or the middle partition of the compressor, the intake pressure of the second compression chamber is greater than the intake pressure of the first compression chamber; The pressure signal interface selectively connects the exhaust port and the air intake port, so that the pressure signal interface can connect and close the exhaust port and the air intake port; the pressure signal interface is used to transmit the pressure signal to the variable capacity mechanism, so that the variable capacity mechanism adjusts the working volume of the first compression chamber and / or the second compression chamber; When the variable capacity mechanism is only provided at the first compression chamber, the full load operation volume of the first compression chamber is V1, the partial load operation volume of the first compression chamber is V1', and the volume of the second compression chamber is V2, then V2 = (2% - 20%) V1; V1' = (30% - 60%) V1; or, When the variable capacity mechanism is only provided at the second compression chamber, the operating volume of the first compression chamber is V1, the partial load operating volume of the second compression chamber is V2', and the full load volume of the second compression chamber is V2, then V2 = (15% - 40%) V1; V2' = (4% - 15%) V1; or, When the variable capacity mechanism is arranged at the first compression chamber and the second compression chamber, the full load operation volume of the first compression chamber is V1, the partial load operation volume of the first compression chamber is V1', the volume of the second compression chamber is V2, and the partial load operation volume of the second compression chamber is V2', then V2'=(4%-15%)V1'; V2=(15%-40%)V1; V1=(110-140)%V1'.

2. A refrigeration device, characterized in that: It comprises the compressor, condenser, evaporator and economizer according to claim 1; the air intake of the compressor is connected to the outlet of the evaporator, the air supply port of the compressor is connected to the economizer, and the economizer is also connected to the condenser and the evaporator respectively.

3. The refrigeration device according to claim 2 comprises a pressure-leading pipeline, a control valve, a high-pressure pipeline interface, a low-pressure pipeline interface, an exhaust pipeline of a compressor, and an intake pipeline of a compressor; the control valve is connected to the pressure signal interface of the compressor, the high-pressure pipeline interface, and the low-pressure pipeline interface respectively through the pressure-leading pipeline, and the pressure signal interface of the compressor is selectively connected to the high-pressure pipeline interface or the low-pressure interface through the control valve; the high-pressure pipeline interface is arranged on the housing of the compressor, the exhaust pipeline of the compressor, the condenser and its connecting pipeline; the low-pressure pipeline interface is arranged on the intake pipeline of the compressor, the evaporator and its connecting pipeline. 4 . The refrigeration device according to claim 3 , wherein the control valve is a three-way valve, a four-way valve or two on-off valves.

5. According to any one of claims 3-4, when the two compression chambers of the compressor are both controlled by a variable capacity mechanism, one control valve is used to control the two compression chambers so that the two compression chambers are simultaneously in a full-load working state or a partial-load working state; or two control valves are used to separately control the variable capacity mechanism so that the two compression chambers are respectively in a full-load or partial-load working state as required.

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