Compressor and air conditioner

Abstract

The invention discloses a compressor and an air conditioner. The compressor comprises a machine shell, a first compression assembly, a second compression assembly and a control assembly, a first air suction port and a first exhaust port which are communicated with each other and a second air suction port and a second exhaust port which are communicated with each other are formed in the machine shell, and the first exhaust port and the second air suction port are selectively communicated; the control assembly comprises a power end, a control switch and a power supply cable. The power supply cable connects the first compression assembly and the second compression assembly with the power end. The control switch is adjustably arranged on the power supply cable so that the first compression assembly and the second compression assembly can be selectively and electrically connected with the power supply end, and the power supply frequency of the first compression assembly is the same as that of the second compression assembly. The compressor is high in compression efficiency, capable of achieving wide-pressure-ratio stable operation and low in manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor and an air conditioner. Background Art

[0002] In the related art, in order to achieve graded compression, the compressor usually uses a dual-rotor motor to directly drive the compression unit. Since the dual-rotor motor is composed of a stator and two inner and outer rotors, the diameter of the dual-rotor motor is relatively large, and since the gap between the inner rotor and the outer rotor is relatively small, the compression efficiency of the compressor including the dual-rotor motor is relatively low; and the dual-rotor motor has high dynamic balancing requirements and high manufacturing costs. When applied to air conditioners, in order to achieve adjustable speed of the dual rotors, the compressor needs to use two inverters. The two inverters and the corresponding electronic control system cause high manufacturing costs and unstable operation of the compressor and air conditioner. Summary of the invention

[0003] The main purpose of the present invention is to provide a compressor, aiming to provide a compressor with high compression efficiency, stable operation with a wide pressure ratio and low manufacturing cost.

[0004] To achieve the above object, the present invention provides a compressor, the compressor comprising:

[0005] A housing is formed with a first air intake port and a first air exhaust port connected to each other, and a second air intake port and a second air exhaust port connected to each other, wherein the first air exhaust port and the second air intake port are selectively connected;

[0006] a first compression assembly, used for compressing the gas flowing into the housing from the first air intake port and discharging it through the first air outlet;

[0007] a second compression assembly, for compressing the gas flowing into the casing from the second air intake port and discharging the gas through the second air discharge port; and

[0008] A control component includes a power supply end, a control switch and a power supply cable, wherein the power supply cable connects the first compression component and the second compression component to the power supply end respectively; the control switch is adjustably arranged on the power supply cable so that the first compression component and the second compression component can be selectively electrically connected to the power supply end, and the power supply frequency of the first compression component is the same as the power supply frequency of the second compression component.

[0009] In one embodiment, the control component also includes a terminal socket connected to the power supply end, the power supply cable includes a first cable and a second cable, the two ends of the first cable are respectively connected to the first compression component and the terminal socket, the two ends of the second cable are respectively connected to the second compression component and the terminal socket, and the control switch is connected in series to the first cable or the second cable.

[0010] In one embodiment, the first compression assembly includes a first motor body and a first compression module drivingly connected to the first motor body, and the first motor body is connected to one end of the first cable; the second compression assembly includes a second motor body and a second compression module drivingly connected to the second motor body, and the second motor body is connected to one end of the second cable, and the first motor body and the second motor body are both variable frequency motors.

[0011] In one embodiment, the casing forms a first compression chamber connected to the first air intake port and the first exhaust port, the first compression chamber includes at least two first sub-chambers connected in sequence, the first compression module includes a first impeller, and each first sub-chamber is provided with a first impeller; the casing also forms a second compression chamber connected to the second air intake port and the second exhaust port, the second compression chamber includes at least one second sub-chamber, the second compression module includes a second impeller, the second sub-chamber is provided with the second impeller, and the number of first sub-chambers is greater than the number of second sub-chambers.

[0012] In one embodiment, the number of rotor poles of the first motor body is greater than the number of rotor poles of the second motor body, and the motor speed of the first motor body is less than the motor speed of the second motor body;

[0013] And / or, the control switch is a circuit breaker.

[0014] In one embodiment, when the first exhaust port is connected to the second intake port, the pressure at the first intake port is P1, and the pressure at the second exhaust port is P2, and P1 and P2 satisfy:

[0015]

[0016] In one embodiment, when the first exhaust port is connected to the second intake port, the pressure at the first exhaust port is P3, the pressure at the second exhaust port is P2, and P3 and P2 satisfy:

[0017]

[0018] In one embodiment, the compressor also includes a connecting pipe and a connecting joint, one end of the connecting pipe is connected to the first exhaust port, and the connecting joint is arranged at the other end of the connecting pipe. The connecting joint can be inserted into the second intake port in a disconnectable manner so that the first exhaust port and the second exhaust port can be selectively connected or disconnected.

[0019] In one embodiment, the first compression assembly further comprises a first exhaust pipe and a first stop valve disposed outside the casing, one end of the first exhaust pipe is communicated with the first exhaust port, the first stop valve is disposed on the first exhaust pipe, and one end of the communication pipe is communicated with the first exhaust pipe located between the first exhaust port and the first stop valve;

[0020] And / or, the second compression assembly further includes a second exhaust pipe and a second stop valve disposed outside the casing, one end of the second exhaust pipe is connected to the second exhaust port, and the second stop valve is disposed on the second exhaust pipe.

[0021] In one embodiment, the casing is formed with an installation cavity, the first compression assembly includes a first motor body, the second compression assembly includes a second motor body, the first motor body and the second motor body are both arranged in the installation cavity, the casing is also formed with a liquid inlet, a liquid outlet and a cooling channel connecting the liquid inlet and the liquid outlet, the cooling channel is arranged on the inner wall surface of the installation cavity and at least partially surrounds the first motor body and the second motor body.

[0022] In one embodiment, the liquid inlet is arranged at the upper part of the housing, the liquid outlet is arranged at the lower part of the housing, and the cooling channel is arranged in a spiral shape on the inner wall surface of the installation cavity.

[0023] The present invention further provides an air conditioner, comprising a frequency converter and the compressor as described above, wherein the frequency converter is connected to the power supply end.

[0024] The compressor of the present invention includes a casing, a first compression assembly, a second compression assembly and a control assembly, the control assembly includes a power supply end, a control switch and a power supply cable, the power supply cable connects the first compression assembly and the second compression assembly to the power supply end respectively, the control switch is adjustably arranged on the power supply cable, so that the first compression assembly and the second compression assembly can be selectively electrically connected to the power supply end, the power supply frequency of the first compression assembly is the same as the power supply frequency of the second compression assembly, so that the power supply end can be connected to an external frequency converter to control the power supply, thereby helping to reduce the manufacturing cost of the compressor, and the first compression assembly and the second compression assembly can be stably operated at the same frequency and exert their respective best pneumatic performance; the first exhaust port and the second air intake port can be selectively connected, so that the compressor can take into account the single-stage compression and double-stage compression operation modes at the same time, the efficiency of multi-stage compression is high, the gas discharged at the same frequency is more stable, and the pressure ratio range of the compressor is wider. It can be seen from this that the present application can provide a compressor with high compression efficiency, stable operation with wide pressure ratio and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of a compressor according to an embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of another embodiment of a compressor of the present invention;

[0028] Figure 3 for Figure 1 A schematic diagram of the structure of the connection between the compressor and the frequency converter;

[0029] Figure 4 for Figure 2 Schematic diagram of the structure of the connection between the compressor and the inverter.

[0030] Description of Figure Numbers:

[0031] Label name Label name 10 compressor 310 Second motor body 100 chassis 320 Second compression module 110 First air intake 321 Second impeller 120 First exhaust port 330 Second regulating guide vane 130 Second air intake 340 Second exhaust pipe 140 Second exhaust port 350 Second stop valve 150 First compression chamber 400 Control components 160 Second compression chamber 410 Power supply 170 Mounting cavity 420 Control switch 200 First compression assembly 430 Power supply cable 210 First motor body 431 First Cable 220 First compression module 432 Second cable 221 First impeller 440 Terminal Block 230 First regulating guide vane 500 Connecting pipe 240 First exhaust pipe 600 Connecting joints 250 First stop valve 20 Frequency Converter 300 Second compression assembly

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention provides a compressor and an air conditioner comprising the compressor. The compressor has high compression efficiency, can realize stable operation with a wide pressure ratio and has low manufacturing cost.

[0037] See also Figures 1 to 4 In one embodiment of the compressor 10 of the present invention, the compressor 10 includes a casing 100, a first compression assembly 200, a second compression assembly 300 and a control assembly 400. The casing 100 is formed with a first air intake port 110 and a first air discharge port 120 that are connected to each other, and a second air intake port 130 and a second air discharge port 140 that are connected to each other. The first air discharge port 120 and the second air intake port 130 can be selectively connected. The first compression assembly 200 is used to compress the gas flowing into the casing 100 from the first air intake port 110 and discharge it through the first air discharge port 120. The second compression assembly 300 is used to compress the gas flowing into the casing 100 from the second air intake port 110 and discharge it through the first air discharge port 120. The gas flowing into the casing 100 at 130 is compressed and discharged through the second exhaust port 140; the control component 400 includes a power supply terminal 410, a control switch 420 and a power supply cable 430, and the power supply cable 430 connects the first compression component 200 and the second compression component 300 to the power supply terminal 410 respectively; the control switch 420 is adjustably arranged on the power supply cable 430 so that the first compression component 200 and the second compression component 300 can be selectively electrically connected to the power supply terminal 410, and the power supply frequency of the first compression component 200 is the same as the power supply frequency of the second compression component 300.

[0038] It can be understood that the first compression assembly 200 can be arranged in the housing 100, the first air intake port 110 and the first air exhaust port 120 can be arranged on one side of the housing 100 and communicate with each other, so that the gas flowing in from the first air intake port 110 can flow out of the housing 100 from the first exhaust port 120; the second compression assembly 300 can be arranged in the housing 100, the second air intake port 130 and the second exhaust port 140 can be arranged on the other side of the housing 100 and communicate with each other, so that the gas flowing in from the second air intake port 130 can flow out of the housing 100 from the second exhaust port 140. Specifically in this embodiment, the first air intake port 110 and the first exhaust port 120 are arranged in the right half of the housing 100, and the second air intake port 130 and the second exhaust port 140 are arranged in the left half of the housing 100.

[0039] Further, the first exhaust port 120 and the second air intake port 130 can be selectively connected, and the first compression assembly 200 and the second compression assembly 300 can be selectively electrically connected to the power supply terminal 410 through the control assembly 400. When one of the first compression assembly 200 and the second compression assembly 300 performs gas compression, the compressor 10 is in a single-head single-stage compression working mode, at which time the gas compressed by the first compression assembly 200 is discharged from the first exhaust port 120, or the gas compressed by the second compression assembly 300 is discharged from the second exhaust port 140. When the first compression assembly 200 and the second compression assembly 300 perform gas compression work separately, the compressor 10 is in a double-head single-stage compression working mode, at which time the gas compressed by the first compression assembly 200 is discharged from the first exhaust port 120, and the gas compressed by the second compression assembly 300 is discharged from the second exhaust port 140. When the first compression assembly 200 and the second compression assembly 300 perform gas compression in series, the compressor 10 is in a two-stage compression working mode. At this time, the gas compressed by the first compression assembly 200 enters the second compression assembly 300 for secondary compression and is discharged from the second exhaust port 140 to the outside of the casing 100. It can be seen that the compressor 10 in the present application has multiple working modes. The compressor 10 can provide gas with a high pressure ratio and gas with a low pressure ratio to meet the air flow requirements of different working conditions, thereby improving the working flexibility and applicability of the compressor 10. The compressor 10 outputs gas with a high pressure ratio, which means that the air flow density output by the compressor 10 is large and the volumetric efficiency is high. The compressor 10 can process more gas at the same power, and the performance and efficiency of the compressor 10 are higher. Among them, the first exhaust port 120 and the second air intake port 130 can be selectively connected in a manner including but not limited to: automatic connection or separation through a connecting component, or manual connection or separation through a connecting component, which is not specifically limited here.

[0040] Furthermore, the control component 400 includes a power supply terminal 410, a control switch 420 and a power supply cable 430. The power supply terminal 410 is used to connect to an inverter 20. The power supply terminal 410 can be a power socket or a power plug. Specifically in this embodiment, the power supply terminal 410 is a power plug. The power supply cable 430 connects the first compression component 200 and the second compression component 300 to the power supply terminal 410 respectively. The power supply frequency of the first compression component 200 is the same as the power supply frequency of the second compression component 300, which means that the number of power supply terminals 410 is one. The present application is connected to an external frequency converter 20 through a power supply terminal 410. The frequency converter 20 is an external power supply device. An frequency converter 20 supplies power to the first compression component 200 and the second compression component 300 respectively through the control component 400. An frequency converter 20 outputs a stable and single power supply frequency. When the first compression component 200 and the second compression component 300 work at the same frequency, they can operate stably and exert their respective best aerodynamic performance. In addition, the compressor 10 has a wider pressure ratio range in different compression modes and a higher efficiency of multi-stage compression. In addition, the number of control switches 420 can be one or more, and the number of power cables 430 is set according to the number of control switches 420. There are many types of control switches 420, including but not limited to: single-control switches, double-control switches, or multi-control switches, etc. It is sufficient that the control switch 420 can adjust the first compression assembly 200 and the second compression assembly 300 to be selectively electrically connected to the power supply terminal 410. Figures 1 to 4 As shown, the arrows indicate the direction of air flow. Figure 1 The compressor 10 is in a two-stage compression working mode; Figure 2 The compressor 10 is in a single-stage compression working mode; Figure 3 The frequency converter 2020 is connected to the power supply terminal 410410 of the compressor 10, and the compressor 10 is in a two-stage compression working mode; Figure 4 The inverter 2020 is connected to the power supply terminal 410410 of the compressor 10, and the compressor 10 is in a single-stage compression working mode.

[0041] The compressor 10 of the present invention includes a housing 100, a first compression assembly 200, a second compression assembly 300 and a control assembly 400, wherein the control assembly 400 includes a power supply terminal 410, a control switch 420 and a power supply cable 430, wherein the power supply cable 430 connects the first compression assembly 200 and the second compression assembly 300 to the power supply terminal 410 respectively, and the control switch 420 is adjustably arranged on the power supply cable 430 so that the first compression assembly 200 and the second compression assembly 300 can be selectively electrically connected to the power supply terminal 410, and the power supply frequency of the first compression assembly 200 and the power supply frequency of the second compression assembly 300 are adjusted. The frequency is the same, so that the power supply end 410 can be connected to an external frequency converter 20 for controlling the power supply, simplifying the control system, which is conducive to reducing the manufacturing cost of the compressor 10, and the first compression assembly 200 and the second compression assembly 300 can operate stably at the same frequency and exert their respective best aerodynamic performance; the first exhaust port 120 and the second air intake port 130 can be selectively connected, so that the compressor 10 can take into account the operation modes of single-stage compression and two-stage compression at the same time, the efficiency of multi-stage compression is high, the gas discharged at the same frequency is more stable, and the pressure ratio range of the compressor 10 is wider. It can be seen that the present application can provide a compressor 10 with high compression efficiency, stable operation with a wide pressure ratio and low manufacturing cost.

[0042] See also Figure 2 In one embodiment, the control component 400 also includes a terminal socket 440 connected to the power supply end 410, and the power supply cable 430 includes a first cable 431 and a second cable 432, and the two ends of the first cable 431 are respectively connected to the first compression component 200 and the terminal socket 440, and the two ends of the second cable 432 are respectively connected to the second compression component 300 and the terminal socket 440, and the control switch 420 is connected in series to the first cable 431 or the second cable 432.

[0043] It can be understood that the terminal block 440 is connected to the power supply end 410 through electric wires, and a terminal block may be provided on the terminal block 440 to facilitate connection with the power supply cable 430. Specifically in the present embodiment, the terminal block 440 includes a base and a first terminal block and a second terminal block provided on the base. One end of the first cable 431 is connected to the first terminal block, and one end of the second cable 432 is connected to the second terminal block. By providing the terminal block 440, the installation convenience of the first cable 431 and the second cable 432 is improved.

[0044] Furthermore, the control switch 420 can be connected in series to the first cable 431, and of course the control switch 420 can also be connected in series to the second cable 432, which is not limited here. When the control switch 420 is connected in series to the first cable 431, the control switch 420 controls the first compression assembly 200 and the wiring socket 440 to be connected, and at this time, the second compression assembly 300 and the wiring socket 440 are connected through the second cable 432. Even if the first compression assembly 200 is damaged and cannot work, the second compression assembly 300 can still work, thereby improving the reliability of the compressor 10. Similarly, when the control switch 420 is connected in series to the second cable 432, the control switch 420 controls the second compression assembly 300 and the terminal socket 440 to be connected. At this time, the first compression assembly 200 and the terminal socket 440 are connected through the first cable 431. Even if the second compression assembly 300 is damaged and cannot work, the first compression assembly 200 can still work. This improves the reliability of the compressor 10. In addition, the method of controlling the operation of the compressor 10 is simple, which simplifies the control system and helps to reduce the manufacturing cost of the compressor 10.

[0045] See also Figure 1 and Figure 2 In one embodiment, the first compression assembly 200 includes a first motor body 210 and a first compression module 220 drivingly connected to the first motor body 210, and the first motor body 210 is connected to one end of the first cable 431; the second compression assembly 300 includes a second motor body 310 and a second compression module 320 drivingly connected to the second motor body 310, and the second motor body 310 is connected to one end of the second cable 432, and the first motor body 210 and the second motor body 310 are both variable frequency motors.

[0046] It can be understood that the first motor body 210 includes a first stator and a first rotor, and the first rotor is connected to the first compression module 220 through a first rotating shaft; the second motor body 310 includes a second stator and a second rotor, and the second rotor is connected to the second compression module 320 through a second rotating shaft. The first compression module 220 may include a first impeller 221 and a first diffuser, the first impeller 221 is arranged between the first air intake port 110 and the first exhaust port 120, and the first diffuser is arranged between the outlet of the first impeller 221 and the first exhaust port 120. The second compression module 320 may include a second impeller 321 and a second diffuser, the second impeller 321 is arranged between the second air intake port 130 and the second exhaust port 140, and the second diffuser is arranged between the outlet of the second impeller 321 and the second exhaust port 140. When the first compression assembly 200 is working, the gas can flow to the first impeller 221 and the first diffuser through the first air intake port 110 and then be discharged through the first exhaust port 120. When the second compression assembly 300 is working, the gas can flow to the second impeller 321 and the second diffuser through the second air intake port 130 and then be discharged through the second exhaust port 140. Such a configuration makes the compressor 10 simple in structure, high in energy efficiency, and has a wider operating range, thereby improving the overall energy efficiency of the compressor 10.

[0047] Furthermore, the compressor 10 includes a first motor body 210 and a second motor body 310, and the first motor body 210 and the second motor body 310 are both connected to the power supply cable 430 of the control component 400, so that one inverter 20 can supply power to the first motor body 210 and the second motor body 310. The same inverter 20 outputs a stable power frequency to the first motor body 210 and the second motor body 310, which is beneficial for the first compression module 220 and the second compression module 320 to exert their respective optimal aerodynamic performance, and simplifies the control system and reduces the manufacturing cost of the compressor 10.

[0048] Furthermore, the first motor body 210 and the second motor body 310 are both variable frequency motors, and the first compression module 220 and the second compression module 320 are respectively controlled by two variable frequency motors, so that the first impeller 221 of the first compression module 220 and the second impeller 321 of the second compression module 320 can run at different speeds, thereby effectively improving the aerodynamic efficiency of the first compression assembly 200 and the second compression assembly 300, thereby improving the efficiency of multi-stage compression. In addition, when the speed of the first impeller 221 is close to its surge area, the speed of the first impeller 221 can be quickly adjusted by driving the variable frequency motor of the first impeller 221, so that the control response of the compressor 10 is faster, the adjustment is more flexible, and the operating range is wider. Similarly, the speed of the second impeller 321 can also be quickly adjusted by driving the variable frequency motor of the second impeller 321, so that the control response of the compressor 10 is faster, the adjustment is more flexible, and the operating range is wider, thereby improving the reliability of the compressor 10.

[0049] In one embodiment, the housing 100 is formed with a first compression chamber 150 communicating with the first air intake port 110 and the first air discharge port 120, and the first compression assembly 200 includes a first regulating guide vane 230, which is disposed in the first compression chamber 150 and between the first air intake port 110 and the first compression module 220, and the first regulating guide vane 230 is used to regulate the air intake volume of the first compression chamber 150. The first regulating guide vane 230 is specifically disposed between the first air intake port 110 and the first impeller 221, so that the first regulating guide vane 230 can first regulate the air intake volume, and then the first compression module 220 compresses the air.

[0050] In one embodiment, the housing 100 is further formed with a second compression chamber 160 communicating with the second air intake port 130 and the second air discharge port 140, and the second compression assembly 300 includes a second regulating guide vane 330, which is disposed in the second compression chamber 160 and between the second air intake port 130 and the second compression module 320, and the second regulating guide vane 330 is used to adjust the air intake volume of the second compression chamber 160. The second regulating guide vane 330 is specifically disposed between the second air intake port 130 and the second impeller 321, so that the second regulating guide vane 330 can first adjust the air intake volume, and then the second compression module 320 compresses the air.

[0051] In one embodiment, the casing 100 forms a first compression chamber 150 connected to the first air intake port 110 and the first exhaust port 120, the first compression chamber 150 includes at least two first sub-chambers connected in sequence, the first compression module 220 includes a first impeller 221, and each first sub-chamber is provided with a first impeller 221; the casing 100 also forms a second compression chamber 160 connected to the second air intake port 130 and the second exhaust port 140, the second compression chamber 160 includes at least one second sub-chamber, the second compression module 320 includes a second impeller 321, the second sub-chamber is provided with the second impeller 321, and the number of the first sub-chambers is greater than the number of the second sub-chambers.

[0052] It can be understood that the first compression chamber 150 includes at least two first sub-chambers connected in sequence, each of which is provided with a first impeller 221. When the first compression module 220 is working, at least two first impellers 221 make the pressure ratio of the first compression module 220 high, thereby improving the compression performance of the compressor 10. When the compressor 10 is in the multi-stage compression operation mode, after the gas passes through the first suction port 110 and passes through the two first sub-chambers in sequence for compression, it enters the second sub-chamber from the first exhaust port 120 through the connecting component, and is discharged from the second exhaust port 140 after being compressed twice in the second sub-chamber. Such a configuration can effectively improve the aerodynamic efficiency of the compressor 10, thereby improving the compression efficiency of the compressor 10 in the two-stage compression operation mode.

[0053] In another embodiment, the number of the first sub-cavities is equal to the number of the second sub-cavities, which is helpful to simplify the structure of the casing 100, making the compressor 10 easy to manufacture and enabling the compressor 10 to output gas stably.

[0054] In one embodiment, the number of rotor poles of the first motor body 210 is greater than the number of rotor poles of the second motor body 310, and the motor speed of the first motor body 210 is less than the motor speed of the second motor body 310. It can be understood that the number of rotor poles of the first motor body 210 is greater than the number of rotor poles of the second motor body 310, and the speed corresponding to the optimal compression efficiency of each stage is different due to the different number of rotor poles; the motor speed of the first motor body 210 is less than the motor speed of the second motor body 310, and the motor speeds of the two can be different, which is beneficial for the first compression assembly 200 and the second compression assembly 300 to exert their respective optimal aerodynamic performance and to improve the aerodynamic compression efficiency. For example, the optimal motor speed of the first motor body 210 is 10000rpm, and the optimal motor speed of the second motor body 310 is 14500rpm. The ratio of 10000 to 14500 is approximately equal to 0.69. Correspondingly, the number of rotor poles of the first motor body 210 can be designed to be 6 poles, and the number of rotor poles of the second motor body 310 can be designed to be 4 poles. The ratio of 4 to 6 is close to 0.69. When the first motor body 210 and the second motor body 310 are powered and driven by the same inverter 20, the motor speed of the first motor body 210 can run at 9800rpm, and the motor speed of the second motor body 310 can run at 14700rpm. In this way, the deviation between the actual running motor speed value of the first motor body 210 and the second motor body 310 and the theoretical optimal motor speed value is less than 2%, which is conducive to the first compression assembly 200 and the second compression assembly 300 to each play the best aerodynamic performance, thereby improving the aerodynamic compression efficiency of the compressor 10.

[0055] In one embodiment, the control switch 420 is a circuit breaker. By connecting the circuit breaker in series with the first cable 431 or the second cable 432, the first motor body 210 or the second motor body 310 and the wiring socket 440 can be controlled by the circuit breaker, which has the advantages of convenient operation and control and high safety, thereby facilitating the repair, replacement and maintenance of the load, and having high practicality.

[0056] Among them, circuit breakers refer to switch devices that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy and protect power lines and loads. When they have serious overloads or short circuits and undervoltage faults, they can automatically cut off the circuit. Its function is equivalent to the combination of fuse switches and over-underheating relays. Moreover, it is generally not necessary to change parts after breaking the fault current.

[0057] In another embodiment, the number of rotor poles of the first motor body 210 is equal to the number of rotor poles of the second motor body 310. In this way, the motor speed of the first motor body 210 is equal to the motor speed of the second motor body 310, and the structure of the first motor body 210 and the structure of the second motor body 310 can be the same, which is conducive to controlling the stable operation of the two at the same frequency.

[0058] In one embodiment, when the first exhaust port 120 is connected to the second air intake port 130, the pressure at the first air intake port 110 is P1, and the pressure at the second exhaust port 140 is P2, and P1 and P2 satisfy:

[0059]

[0060] It can be understood that when the first exhaust port 120 is connected to the second air intake port 130, the ratio of the pressure at the second exhaust port 140 to the pressure at the first air intake port 110 is the pressure ratio of the compressor 10, and the pressure ratio of the compressor 10 is greater than or equal to 3, so that the compressor 10 can provide gas with a high pressure ratio, the compressor 10 processes more gas at the same power, and the compression efficiency of the compressor 10 is high. Among them, the ratio of P2 to P1 can be 3, or 3.5, or 4, or 5, etc., which is not specifically limited here.

[0061] In one embodiment, when the first exhaust port 120 is connected to the second air intake port 130, the pressure at the first exhaust port 120 is P3, and the pressure at the second exhaust port 140 is P2, and P3 and P2 satisfy:

[0062]

[0063] It can be understood that by limiting the relationship between the pressure at the first exhaust port 120 and the pressure at the second exhaust port 140, it is equivalent to limiting the relationship between the gas compressed by the first compression assembly 200 and the gas compressed by the second compression assembly 300. This solution allows the compressor 10 to have a wider pressure ratio range by limiting the relationship between the pressure at the second exhaust port 140 and the pressure at the first exhaust port 120, and the compressor 10 achieves wide-range and efficient operation. The ratio can be 0.8, or 1.0, or 1.1, or 1.2, etc., and is not limited here.

[0064] See also Figure 1 and Figure 3In one embodiment, the compressor 10 further includes a connecting pipe 500 and a connecting joint 600, one end of the connecting pipe 500 is connected to the first exhaust port 120, and the connecting joint 600 is arranged at the other end of the connecting pipe 500, and the connecting joint 600 can be inserted into the second intake port 130 in a disconnectable manner so that the first exhaust port 120 and the second exhaust port 140 can be selectively connected or disconnected.

[0065] It is understandable that by providing the connecting pipe 500 and the connecting joint 600, the first exhaust port 120 and the second air intake port 130 can be selectively connected or disconnected, and the connecting joint 600 and the casing 100 can be connected and disconnected in a manner including but not limited to: automatic connection and disconnection, or manual connection and disconnection; the connecting joint 600 and the casing 100 can be threadedly connected or snap-fitted, etc. When the compressor 10 requires a single-stage compression working mode, the connecting joint 600 is separated from the casing 100, and when the compressor 10 requires a two-stage compression working mode, the connecting joint 600 is inserted into the second air intake port 130, so that the compressor 10 can simultaneously take into account the single-stage compression and two-stage compression operating modes, the compressor 10 has a wider pressure ratio range, and the compressor 10 has a high compression efficiency. In addition, the connecting joint 600 can be threadedly connected or snap-fitted with the connecting pipe 500, so that it is easy to assemble the connecting joint 600, which is conducive to simplifying the structure of the compressor 10.

[0066] In one embodiment, the first compression assembly 200 further includes a first exhaust pipe 240 and a first stop valve 250 disposed outside the housing 100, one end of the first exhaust pipe 240 is communicated with the first exhaust port 120, the first stop valve 250 is disposed on the first exhaust pipe 240, and one end of the connecting pipe 500 is communicated with the first exhaust pipe 240 located between the first exhaust port 120 and the first stop valve 250;

[0067] And / or, the second compression assembly 300 further includes a second exhaust pipe 340 and a second stop valve 350 disposed outside the casing 100 , one end of the second exhaust pipe 340 is connected to the second exhaust port 140 , and the second stop valve 350 is disposed on the second exhaust pipe 340 .

[0068] It can be understood that the first stop valve 250 is connected in series to the first exhaust pipe 240 to open or close the flow of the first exhaust pipe 240. The second stop valve 350 is connected in series to the second exhaust pipe 340 to open or close the flow of the second exhaust pipe 340, and one end of the connecting pipe 500 is connected to the first exhaust pipe 240 located upstream of the first stop valve 250. When the compressor 10 requires the first compression assembly 200 to work and is in a two-stage compression working mode, the first stop valve 250 is closed, the second stop valve 350 is opened, and the connecting joint 600 is inserted into the second suction port 130. The gas compressed by the first compression assembly 200 enters the second compression assembly 300 along the connecting pipe 500 and the connecting joint 600 for secondary compression and is discharged from the second exhaust port 140 to the outside of the casing 100.

[0069] When the compressor 10 needs the first compression assembly 200 to work and is in a single-stage compression working mode, the first stop valve 250 is opened, the second stop valve 350 is closed, and the gas compressed by the first compression assembly 200 is discharged from the first exhaust port 120 to the outside of the casing 100. When the compressor 10 needs the second compression assembly 300 to work and is in a single-stage compression working mode, the second stop valve 350 is opened, the connecting joint 600 is separated from the casing 100, and the gas compressed by the second compression assembly 300 is discharged from the second exhaust port 140 to the outside of the casing 100. Such a configuration enables the compressor 10 to have multiple working modes, and the compressor 10 can provide gas with a high pressure ratio and gas with a low pressure ratio to meet the airflow requirements of different working conditions, thereby improving the working flexibility and applicability of the compressor 10.

[0070] In one embodiment, the housing 100 is formed with an installation cavity 170, the first compression assembly 200 includes a first motor body 210, the second compression assembly 300 includes a second motor body 310, the first motor body 210 and the second motor body 310 are both arranged in the installation cavity 170, and the housing 100 is also formed with a liquid inlet, a liquid outlet and a cooling channel connecting the liquid inlet and the liquid outlet, and the cooling channel is arranged on the inner wall surface of the installation cavity 170 and at least partially surrounds the first motor body 210 and the second motor body 310.

[0071] It is understandable that in order to cool down the compressor 10, the coolant can flow from the liquid inlet into the cooling channel, and then cool the parts in the installation cavity 170, that is, cool the first motor body 210 and the second motor body 310, and the cooled coolant can flow out from the liquid outlet. The cooling channel on the inner wall surface of the installation cavity 170 is at least partially arranged around the first motor body 210 and the second motor body 310, so that the coolant can cool the first motor body 210 and the second motor body 310 when flowing, thereby avoiding the first motor body 210 and the second motor body 310 from being too high in temperature during operation, and improving the stability of the operation of the compressor 10. In addition, the first motor body 210 and the second motor body 310 are arranged in an installation cavity 170, which is conducive to simplifying the structure of the cooling channel and the installation cavity 170, the utilization rate of the coolant is high, and the structure in the installation cavity 170 is compact, thereby simplifying the structure of the compressor 10.

[0072] In one embodiment, the cooling channel is arranged on the inner wall surface of the installation cavity and its downward projection at least partially falls on the first motor body and the second motor body. This makes it easy for the coolant to fall on the first motor body 210 and the second motor body 310 under the action of gravity to cool them, which is beneficial to improving the cooling effect.

[0073] In one embodiment, the liquid inlet is provided at the upper part of the housing 100, the liquid outlet is provided at the lower part of the housing 100, and the cooling channel is provided in a spiral shape on the inner wall surface of the mounting cavity 170. With such a configuration, the coolant flowing into the mounting cavity 170 from the liquid inlet can flow to the cooling channel under the action of gravity, and finally flow out from the liquid outlet. The spiral cooling channel is conducive to increasing the cooling area, thereby improving the working stability of the compressor 10.

[0074] The present invention further provides an air conditioner, which includes a frequency converter 20 and the compressor 10 as described above. The specific structure of the compressor 10 refers to the above embodiment. Since the air conditioner adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The frequency converter 20 is connected to the power supply terminal 410.

[0075] See also Figure 3 and Figure 4The compressor 10 can be applied to an air conditioner, and the number of the inverter 20 is one, and the compressor 10 is powered by the inverter 20. The inverter 20 outputs a stable and single power frequency, and when the first compression assembly 200 and the second compression assembly 300 work at the same frequency, they can operate stably and exert their respective best aerodynamic performance. In addition, the inverter 20 can be selectively connected to the first compression assembly 200 and the second compression assembly 300 through the control assembly 400 to control the power supply, so that the control system between the inverter 20 and the compressor 10 is simple, and the compressor 10 controls the first compression assembly 200 and the second compression assembly 300, which is conducive to reducing the manufacturing cost of the compressor 10 and the air conditioner.

[0076] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: A housing is formed with a first air intake port and a first air exhaust port connected to each other, and a second air intake port and a second air exhaust port connected to each other, wherein the first air exhaust port and the second air intake port are selectively connected; a first compression assembly, used for compressing the gas flowing into the housing from the first air intake port and discharging it through the first air outlet; a second compression assembly, for compressing the gas flowing into the housing from the second air intake port and discharging the gas through the second air exhaust port; as well as A control component includes a power supply end, a control switch and a power supply cable, wherein the power supply cable connects the first compression component and the second compression component to the power supply end respectively; the control switch is adjustably arranged on the power supply cable so that the first compression component and the second compression component can be selectively electrically connected to the power supply end, and the power supply frequency of the first compression component is the same as the power supply frequency of the second compression component.

2. The compressor according to claim 1, characterized in that The control component also includes a terminal socket connected to the power supply end, and the power supply cable includes a first cable and a second cable, the two ends of the first cable are respectively connected to the first compression component and the terminal socket, the two ends of the second cable are respectively connected to the second compression component and the terminal socket, and the control switch is connected in series to the first cable or the second cable.

3. The compressor according to claim 2, characterized in that The first compression assembly includes a first motor body and a first compression module drivingly connected to the first motor body, and the first motor body is connected to one end of the first cable; the second compression assembly includes a second motor body and a second compression module drivingly connected to the second motor body, and the second motor body is connected to one end of the second cable, and the first motor body and the second motor body are both variable frequency motors.

4. The compressor according to claim 3, characterized in that The casing forms a first compression chamber connected to the first air intake port and the first exhaust port, the first compression chamber includes at least two first sub-chambers connected in sequence, the first compression module includes a first impeller, and each first sub-chamber is provided with a first impeller; the casing also forms a second compression chamber connected to the second air intake port and the second exhaust port, the second compression chamber includes at least one second sub-chamber, the second compression module includes a second impeller, and the second impeller is provided in the second sub-chamber, and the number of the first sub-chambers is greater than the number of the second sub-chambers.

5. The compressor according to claim 3, characterized in that The number of rotor poles of the first motor body is greater than the number of rotor poles of the second motor body, and the motor speed of the first motor body is less than the motor speed of the second motor body; And / or, the control switch is a circuit breaker.

6. The compressor according to claim 1, characterized in that When the first exhaust port is connected to the second intake port, the pressure at the first intake port is P1, and the pressure at the second exhaust port is P2, and P1 and P2 satisfy:

7. The compressor according to claim 1, characterized in that When the first exhaust port is connected to the second intake port, the pressure at the first exhaust port is P3, and the pressure at the second exhaust port is P2, and P3 and P2 satisfy:

8. The compressor according to claim 1, characterized in that The compressor also includes a connecting pipe and a connecting joint, one end of the connecting pipe is connected to the first exhaust port, and the connecting joint is arranged at the other end of the connecting pipe. The connecting joint can be inserted into the second intake port in a disconnectable manner so that the first exhaust port and the second exhaust port can be selectively connected or disconnected.

9. The compressor according to claim 8, characterized in that The first compression assembly further includes a first exhaust pipe and a first stop valve disposed outside the casing, one end of the first exhaust pipe is communicated with the first exhaust port, the first stop valve is disposed on the first exhaust pipe, and one end of the communicating pipe is communicated with the first exhaust pipe located between the first exhaust port and the first stop valve; And / or, the second compression assembly further includes a second exhaust pipe and a second stop valve disposed outside the casing, one end of the second exhaust pipe is connected to the second exhaust port, and the second stop valve is disposed on the second exhaust pipe.

10. The compressor according to any one of claims 1 to 9, characterized in that: The casing is formed with an installation cavity, the first compression assembly includes a first motor body, the second compression assembly includes a second motor body, the first motor body and the second motor body are both arranged in the installation cavity, the casing is also formed with a liquid inlet, a liquid outlet and a cooling channel connecting the liquid inlet and the liquid outlet, the cooling channel is arranged on the inner wall surface of the installation cavity and at least partially surrounds the first motor body and the second motor body.

11. The compressor according to claim 10, characterized in that The liquid inlet is arranged at the upper part of the housing, the liquid outlet is arranged at the lower part of the housing, and the cooling channel is arranged in a spiral shape on the inner wall surface of the installation cavity.

12. An air conditioner, characterized in that: It comprises a frequency converter and a compressor as claimed in any one of claims 1 to 11, wherein the frequency converter is connected to the power supply terminal.

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