Magnetic levitation air refrigeration device

Abstract

The application discloses a magnetic suspension air refrigeration device, which comprises a compressor, an expander and a heat exchanger. The compressor and the expander are coaxially connected to form a compression-expansion integrated machine. The inlet end of the compressor is used for connecting a cold unit. The outlet end of the compressor, the heat exchanger and the inlet end of the expander are sequentially connected. The outlet end of the expander is used for connecting a cold unit. The magnetic suspension air refrigeration device uses natural working medium air as a refrigerant, uses a magnetic suspension compression-expansion integrated machine as a power source, is energy-saving and environment-friendly, saves cost, and uses the expansion work output by the expander on the compressor, so that the overall power consumption is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration devices, more particularly to a magnetic suspension air refrigeration device. BACKGROUND

[0002] The existing refrigeration device is usually composed of a compressor, a condenser, a throttling valve and an evaporator connected in sequence by pipelines. The compressor discharges high-temperature and high-pressure refrigerant, the refrigerant releases heat in the condenser to become medium-temperature and high-pressure refrigerant, and then the refrigerant is reduced in pressure by the throttling valve to become low-temperature and low-pressure refrigerant and enters the evaporator. After the refrigerant is evaporated, the cold energy is transferred to the cold use site through heat exchange in the evaporator, and then the refrigerant is sucked into the compressor again to complete the refrigeration cycle.

[0003] Therefore, the existing refrigeration device selects a phase-changeable refrigerant as the refrigerant, such as CFCs and HCFCs, which not only has high refrigeration cost, but also pollutes the environment.

[0004] Under the promotion of environmental protection and energy saving strategies, the first generation of refrigerants (CFCs) is gradually replaced, the second generation of refrigerants (HCFCs) and the third generation of refrigerants (HFCs) are limited and replaced, and natural working medium is paid attention to again. The magnetic suspension technology belongs to the high-tech industry and has the characteristics of energy saving, high efficiency and green.

[0005] In summary, how to develop a new fourth generation of refrigerants, improve the energy saving efficiency of the refrigeration system and develop a new refrigeration mode is a problem to be solved by the technical personnel in the field. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a magnetic suspension air refrigeration device which uses natural working medium air as the refrigerant, uses a magnetic suspension compression and expansion integrated machine as the power source, is energy-saving, environmentally friendly and cost-saving, and uses the expansion work of the expansion machine to reduce the overall power consumption.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0008] A magnetic suspension air refrigeration device comprises a compressor, an expander and a heat exchanger, the compressor and the expander are coaxially connected to form a compression and expansion integrated machine, the inlet end of the compressor is used to communicate with a cold use unit, the outlet end of the compressor, the heat exchanger and the inlet end of the expander are sequentially communicated, and the outlet end of the expander is used to communicate with the cold use unit.

[0009] Preferably, the compressor is a magnetic suspension compressor, the expander is a magnetic suspension expander, and the rotor of the magnetic suspension compressor and the rotor of the magnetic suspension expander are connected as a whole through a rotating shaft.

[0010] Preferably, the heat exchanger is a plate-fin heat exchanger, and a fan is arranged on one side of the heat exchanger.

[0011] Preferably, a flow guide cover is arranged on the outer periphery of the heat exchanger, and the fan is arranged at the cover opening of the flow guide cover.

[0012] Preferably, the compressor-expander integrated machine is arranged on a first support, the heat exchanger is arranged on a second support, and the inlet end of the heat exchanger is higher than the outlet end of the compressor, and the outlet end of the heat exchanger is lower than the inlet end of the expander.

[0013] Preferably, the outlet end of the compressor is connected to the inlet end of the heat exchanger through a first pipeline, the outlet end of the heat exchanger is connected to the inlet end of the expander through a second pipeline, and the first pipeline and the second pipeline are arranged in the same direction.

[0014] Preferably, the compressor-expander integrated machine is arranged in a first housing, and the heat exchanger is arranged in a second housing.

[0015] The opposite two shell walls of the first housing and the second housing are each provided with a first through hole for the first pipeline and a second through hole for the second pipeline.

[0016] The shell wall of the first housing is further provided with a suction pipe and an exhaust pipe, the suction pipe connects the cold-using unit to the inlet end of the compressor, and the exhaust pipe connects the outlet end of the expander to the cold-using unit.

[0017] Preferably, a first temperature detection device is further included, the first temperature detection device is arranged on the cold-using unit, the first temperature detection device and the compressor are electrically connected to a control system, the control system is used to obtain the temperature detected by the first temperature detection device and control the rotating speed of the compressor.

[0018] Preferably, the outlet end of the expander is connected to the cold-using unit through an exhaust pipe, a second temperature detection device is arranged on the exhaust pipe, the second temperature detection device is electrically connected to the control system, and the control system is used to obtain the temperature detected by the second temperature detection device and control the rotating speed of the compressor.

[0019] Preferably, a pressure detection device is further arranged on the exhaust pipe, the pressure detection device is electrically connected to the control system, and the control system is used to obtain the pressure detected by the pressure detection device and control the rotating speed of the compressor.

[0020] The magnetic suspension air refrigeration device provided by the application is used for refrigeration, in which air in the environment is sucked into a compressor, the air is compressed into high-temperature and high-pressure air by the compressor, the high-temperature and high-pressure air is heated in a heat exchanger to become medium-temperature and high-pressure air, the medium-temperature and high-pressure air is expanded in an expander to become low-temperature and low-pressure air, at the same time, the work done by the gas in the expansion process (i.e. the output work of the expander) is transmitted to the compressor through a shaft to be the input work of the compressor, and then the low-temperature and low-pressure air enters a refrigeration unit to refrigerate the refrigeration unit.

[0021] Therefore, the application has the following beneficial effects:

[0022] (1) The natural working medium air is used as the refrigerant, compared with the traditional refrigerant, the air cannot produce greenhouse effect and is easy to obtain, so that the energy is saved, the environment is protected and the cost is saved.

[0023] (2) The coaxial compressor and expander are used as the power source, the expansion work of the expander can be used for the compressor, and the overall power consumption is lower under the same refrigeration capacity. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only are the embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0025] Figure 1 The structure schematic diagram of the magnetic suspension air refrigeration device provided by the application is shown in the figure.

[0026] Figure 2 The air flow path diagram of the magnetic suspension air refrigeration device provided by the application is shown in the figure.

[0027] Reference signs:

[0028] 1 - refrigeration unit; 2 - compression and expansion integrated machine; 21 - compressor; 22 - expander; 3 - heat exchanger; 4 - fan; 5 - rotating shaft; 6 - air suction pipe; 7 - first pipeline; 8 - second pipeline; 9 - air exhaust pipe; 10 - first support; 11 - second support; 12 - second temperature detection device; 13 - pressure detection device. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0030] The core of the present application is to provide a magnetic suspension air refrigeration device, which uses natural working medium air as refrigerant, is energy-saving and environment-friendly, and uses the expansion work output by an expander on a compressor to improve refrigeration efficiency and reduce overall power consumption.

[0031] Please refer to Figure 1 and Figure 2 The present application provides a magnetic suspension air refrigeration device, which comprises a compressor 21, an expander 22 and a heat exchanger 3. The compressor 21 and the expander 22 are coaxially connected to form a compression-expansion integrated machine 2. The inlet end of the compressor 21 is used to communicate with a cooling unit 1. The outlet end of the compressor 21, the heat exchanger 3 and the inlet end of the expander 22 are sequentially communicated. The outlet end of the expander 22 is used to communicate with the cooling unit 1.

[0032] It should be noted that the function of the compressor 21 is to compress low-temperature and low-pressure gas into high-temperature and high-pressure gas. The function of the expander 22 is to output mechanical work to the outside when the compressed gas is expanded and reduced in pressure, so that the temperature of the gas is reduced to obtain cold energy, thereby achieving the purpose of reducing pressure and temperature. In addition, the cooling unit 1 refers to the indoor space or equipment that needs to be refrigerated and cooled.

[0033] Specifically, the compressor 21 and the expander 22 are coaxially connected to form a compression-expansion integrated machine 2, that is, the impeller of the compressor 21 and the impeller of the expander 22 are coaxially connected. Therefore, the mechanical work output to the outside when the expander 22 is expanded and reduced in pressure can be transmitted to the compressor 21, so as to drive the compressor 21 to operate as the input work of the compressor 21. The inlet end of the compressor 21 is connected to the cooling unit 1 through a suction pipe 6. The outlet end of the compressor 21 is connected to the inlet end of the heat exchanger 3 through a first pipe 7. The outlet end of the heat exchanger 3 is connected to the inlet end of the expander 22 through a second pipe 8. The outlet end of the expander 22 is connected to the cooling unit 1 through an exhaust pipe 9, thereby forming a refrigeration cycle loop.

[0034] When the magnetic levitation air refrigeration device is used for refrigeration, the air in the environment of the cold unit 1 is sucked into the compressor 21, the air is compressed into high-temperature and high-pressure air by the compressor 21, the high-temperature and high-pressure air enters the heat exchanger 3 to be heat-exchanged into medium-temperature and high-pressure air, the medium-temperature and high-pressure air enters the expander 22 to be expanded and reduced in pressure into low-temperature and low-pressure air, at the same time, the work done by the gas in the expansion process (i.e. the output work of the expander 22) is transmitted to the compressor 21 through the shaft to be the input work of the compressor 21, and then the low-temperature and low-pressure air enters the cold unit 1 to refrigerate the cold unit 1.

[0035] Therefore, the magnetic levitation air refrigeration device has the following beneficial effects: first, the natural working medium air is used as the refrigerant, compared with the traditional refrigerant, the air cannot produce the greenhouse effect and is easy to obtain, so that the energy is saved, the environment is protected, and the cost is saved; second, the coaxially connected compressor 21 and expander 22 are used as the power source, the expansion work output by the expander 22 can act on the compressor 21, and under the same refrigeration capacity, the overall power consumption is lower.

[0036] On the basis of the above embodiment, the compressor 21 is a magnetic levitation compressor 21, and the expander 22 is a magnetic levitation expander 22, and the rotor of the magnetic levitation compressor 21 and the rotor of the magnetic levitation expander 22 are connected into one body through the shaft 5.

[0037] Therefore, the magnetic levitation compressor 21 and the magnetic levitation expander 22 both adopt the magnetic levitation bearing technology, mechanical contact and friction are eliminated, and the transmission efficiency is high, so that not only the energy consumption can be saved, but also the refrigeration efficiency can be improved. It should be noted that the specific structure of the magnetic levitation compressor 21 and the magnetic levitation expander 22 is not the protection key point of the present application, and can refer to the prior art, which will not be described in detail here.

[0038] In an embodiment, the heat exchanger 3 is a plate-fin heat exchanger, and one side of the plate-fin heat exchanger is provided with the fan 4.

[0039] It should be noted that the plate-fin heat exchanger is usually composed of a plurality of fin groups arranged at equal intervals, and the gaps between the fin groups form heat exchange channels, so that the high-temperature air flowing into the fin groups is heat-exchanged with the air in the environment in convection to achieve air cooling. In addition, the plate-fin heat exchanger can meet the case that the two sides of heat exchange are both air and the cold side is under negative pressure, and the sealing condition is good.

[0040] Thus, the fan 4 is arranged at one side of the plate-fin heat exchanger, which can increase the air gap flow between the fin groups in the environment, so as to increase the contact area between the air in the environment and the fin groups, thereby accelerating the heat exchange process between the air in the environment and the high-temperature air in the fin groups, thereby enhancing the refrigeration effect of the plate-fin heat exchanger, and further reducing the rotation speed of the compressor 21 or the air suction amount under the same refrigeration capacity, so as to further reduce the overall power consumption. In addition, the plate-fin heat exchanger is used as the heat exchanger 3, which saves the water cooling pipe and the cooling water supply compared with the water-cooled heat exchanger, thereby being more adaptable.

[0041] Preferably, the heat exchanger 3 is provided with a flow guide cover, and the fan 4 is arranged at the cover opening of the flow guide cover. Thus, the air in the environment can only enter from the cover opening of the flow guide cover under the action of the suction force of the fan 4, so that the air is fully in contact with the fin groups of the heat exchanger 3 for heat exchange, thereby further improving the heat exchange effect of the heat exchanger 3.

[0042] Based on the above embodiment, please refer to Figure 1 The compressor-expander integrated machine 2 is arranged on the first support 10, and the heat exchanger 3 is arranged on the second support 11, and the inlet end of the heat exchanger 3 is higher than the outlet end of the compressor 21, and the outlet end of the heat exchanger 3 is lower than the inlet end of the expander 22.

[0043] Thus, the first support 10 can stably support the compressor-expander integrated machine 2, and the second support 11 can stably support the heat exchanger 3, thereby improving the structural stability of the refrigeration device. At the same time, the inlet end of the heat exchanger 3 is higher than the outlet end of the compressor 21, which facilitates the high-temperature and high-pressure air discharged by the compressor 21 to rise and diffuse into the heat exchanger 3 for heat exchange, and the outlet end of the heat exchanger 3 is lower than the inlet end of the expander 22, which facilitates the medium-temperature and high-pressure air after heat exchange to rise and diffuse into the inlet end of the expander 22, thereby improving the air flow efficiency, and further improving the refrigeration efficiency.

[0044] Based on the above embodiment, please refer to Figure 1 The outlet end of the compressor 21 is communicated with the inlet end of the heat exchanger 3 through the first pipeline 7, the outlet end of the heat exchanger 3 is communicated with the inlet end of the expander 22 through the second pipeline 8, and the first pipeline 7 and the second pipeline 8 are arranged in the same direction.

[0045] Thus, the first pipeline 7 and the second pipeline 8 are oppositely arranged between the compressor-expander integrated machine 2 and the heat exchanger 3, and are approximately parallel, so as to simplify the overall pipeline structure and reduce the air flow resistance, thereby further improving the refrigeration efficiency.

[0046] Based on the above embodiment, the compressor-expander integrated machine 2 is arranged in a first shell, and the heat exchanger 3 is arranged in a second shell.

[0047] Therefore, the first shell can protect the compression-expansion integrated machine 2, and the second shell can protect the heat exchanger 3, so that the normal operation of the compression-expansion integrated machine 2 and the heat exchanger 3 is ensured, and the reliable refrigeration operation of the refrigeration device is ensured.

[0048] It should be noted that the two opposite shell walls of the first shell and the second shell are provided with first perforations for the first pipeline 7 to pass through and second perforations for the second pipeline 8 to pass through. In this way, one end of the first pipeline 7 is connected to the outlet end of the compressor 21, and the other end of the first pipeline 7 passes through the first perforation and is connected to the inlet end of the heat exchanger 3. One end of the second pipeline 8 is connected to the outlet end of the heat exchanger 3, and the other end of the second pipeline 8 passes through the second perforation and is connected to the inlet end of the expander 22, so that the compression-expansion integrated machine 2 and the heat exchanger 3 are communicated. In addition, the suction pipe 6 for connecting the air cooling unit 1 and the inlet end of the compressor 21 is penetrated through the side shell wall of the first shell, so that the compressor 21 inhales the air in the air cooling unit 1. The exhaust pipe 9 for connecting the outlet end of the expander 22 and the air cooling unit 1 is penetrated through the other side shell wall of the first shell, so that the expander 22 discharges the cooled air into the air cooling unit 1.

[0049] On the basis of the above-mentioned embodiment, the application further comprises a first temperature detection device, which is installed in the air cooling unit 1, and the first temperature detection device and the compressor 21 are electrically connected to a control system. The control system is used to obtain the temperature detected by the first temperature detection device and control the rotating speed of the compressor 21.

[0050] In this way, the first temperature detection device detects the real-time temperature of the air cooling unit 1 and transmits the real-time temperature to the control system. The control system compares the real-time temperature of the air cooling unit 1 with the preset maximum temperature. If the real-time temperature of the air cooling unit 1 exceeds the preset maximum temperature, it indicates that the temperature of the air cooling unit 1 is too high at this time and does not meet the requirements. The control system controls the compressor 21 and the expander 22 to start, and controls the rotating speed of the compressor 21. If the real-time temperature of the air cooling unit 1 is lower than the preset maximum temperature, it indicates that the temperature of the air cooling unit 1 is reduced to the temperature range meeting the requirements at this time. The control system controls the compressor 21 and the expander 22 to stop. Therefore, the first temperature detection device electrically connected to the control system can maintain the temperature of the air cooling unit in the appropriate temperature range, so as to effectively improve the refrigeration effect and reliability of the refrigeration device, and further improve the user comfort in the room.

[0051] It should be noted that, please refer to Figure 2 The compressor 21 and the expander 22 are connected into one through the rotating shaft 5. The end of the rotating shaft 5 is connected to a motor. The motor serves as a power source for driving the compression-expansion integrated machine 2 to operate. The control system can control the rotating speed of the compressor 21 and the expander 22 by controlling the rotating speed of the motor.

[0052] Further, please refer to Figure 1The second temperature detecting device 12 is arranged on the exhaust pipe 9 and is electrically connected with the control system, and the control system is used for obtaining the temperature detected by the second temperature detecting device 12 and controlling the rotating speed of the compressor 21.

[0053] Therefore, the second temperature detecting device 12 is used for detecting the real-time temperature of the expander 22 after cooling (i.e. the air temperature of the cooling unit 1) and transmitting to the control system.

[0054] On the basis of the above embodiment, please refer to Figure 1 The present application also comprises a pressure detecting device electrically connected with the control system, which is arranged on the exhaust pipe 9 and is used for detecting the air pressure in the exhaust pipe 9.

[0055] It should be noted that the relative terms, such as first and second, in the present specification are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0056] The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0057] The magnetic levitation air refrigeration device provided by the present application is described in detail above. The principle and implementation manner of the present application are described by applying specific examples in the present specification, and the above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that, for ordinary skilled in the art, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A magnetic levitation air refrigeration device, characterized by, It includes compressor (21), expander (22) and heat exchanger (3), the compressor (21) and the expander (22) are coaxially connected to form compression expansion integrated machine (2), and the inlet end of the compressor (21) is used to communicate with the cold unit (1), the outlet end of the compressor (21), the heat exchanger (3) and the inlet end of the expander (22) are communicated in turn, and the outlet end of the expander (22) is used to communicate with the cold unit (1); The compressor (21) is a magnetic suspension compressor (21), the expander (22) is a magnetic suspension expander (22), and the rotor of the magnetic suspension compressor (21) and the rotor of the magnetic suspension expander (22) are connected into one through the shaft (5); The heat exchanger (3) is a plate-fin heat exchanger, and one side of the heat exchanger (3) is provided with a fan (4); The outer periphery of the heat exchanger (3) is provided with a flow guide cover, and the fan (4) is arranged at the cover opening of the flow guide cover; The compression expansion integrated machine (2) is arranged on the first support (10), the heat exchanger (3) is arranged on the second support (11), and the inlet end of the heat exchanger (3) is higher than the outlet end of the compressor (21), and the outlet end of the heat exchanger (3) is lower than the inlet end of the expander (22); The outlet end of the compressor (21) is connected to the inlet end of the heat exchanger (3) through the first pipeline (7), the outlet end of the heat exchanger (3) is connected to the inlet end of the expander (22) through the second pipeline (8), and the first pipeline (7) and the second pipeline (8) extend in the same direction.

2. The magnetic levitation air conditioning device according to claim 1, characterized by, The compression expansion integrated machine (2) is arranged in a first shell, and the heat exchanger (3) is arranged in a second shell; The opposite two shell walls of the first shell and the second shell are provided with a first perforation for the first pipeline (7) to pass through and a second perforation for the second pipeline (8) to pass through; The shell wall of the first shell is also provided with an air suction pipe (6) and an exhaust pipe (9), the air suction pipe (6) connects the cold unit (1) with the inlet end of the compressor (21), and the exhaust pipe (9) connects the outlet end of the expander (22) with the cold unit (1).

3. The magnetic levitation air conditioning device according to claim 1 or 2, characterized by, It also includes a first temperature detection device for installation in the cold unit (1), and the first temperature detection device and the compressor (21) are electrically connected to a control system, and the control system is used to obtain the temperature detected by the first temperature detection device and control the rotating speed of the compressor (21).

4. The magnetic levitation air conditioning device according to claim 1 or 2, characterized by, The outlet end of the expander (22) is connected to the cold unit (1) through the exhaust pipe (9), a second temperature detection device (12) is arranged on the exhaust pipe (9), the second temperature detection device (12) is electrically connected to a control system, and the control system is used to obtain the temperature detected by the second temperature detection device (12) and control the rotating speed of the compressor (21).

5. The magnetic levitation air conditioning device according to claim 4, characterized by, The exhaust pipe (9) is further provided with a pressure detection device (13), the pressure detection device (13) is electrically connected with the control system, the control system is used for acquiring the pressure detected by the pressure detection device (13) and controlling the rotating speed of the compressor (21).

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