Direct-current variable-frequency gentle-tone compressor with internal air intake

Abstract

The invention belongs to the technical field of compressors, and particularly relates to an internal air inlet direct-current variable-frequency gentle-tone compressor which comprises a machine body, an air inlet sound insulation plate is fixedly connected to the side end of the machine body, a cavity A is formed between the air inlet sound insulation plate and the machine body, an eccentric wheel air inlet cavity is fixedly connected to the end, close to the machine body, of the cavity A, and a cavity B is formed in the end, away from the cavity A, of the machine body; first air inlets are fixedly formed in the two ends of the machine body, a second air inlet is formed in the end, away from the first air inlets, of the machine body, a first air outlet is formed in the side, close to the cavity A, of the top end of the machine body, and a second air outlet is formed in the end, away from the first air outlet, of the machine body. The two air inlets are formed in the two sides of the machine body, the first air inlet and the second air inlet can enable the compressor to provide more air, the pressure of the compressor is reduced, and therefore noise is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a direct-current variable-frequency silent compressor with internal air intake. Background Art

[0002] In the technical field of compressors, with the improvement of people's living quality and the increasingly strict requirements of industrial production for equipment performance, traditional compressors have gradually revealed many deficiencies and are difficult to meet the current usage requirements. Especially regarding the noise problem, if the compressor supporting large equipment generates too much noise, it may interfere with the normal detection of the equipment and lead to inaccurate detection results. For example, the patent with the publication number CN115503444A discloses a direct-current variable-frequency air-conditioning compressor and its usage method, which includes a compression device, a sealing bottom plate, a limiting support device, a transmission device, and a limiting device. Four groups of limiting devices for limiting are evenly and equidistantly fixedly installed on the upper end surface of the transmission device, and a compression device for guiding air is fixedly installed near the upper part of the inner end surfaces of the four groups of limiting devices. Through the setting of the limiting support device in this patent, during the rapid maintenance of the compressor, the servo motor can drive the connecting support plate to rotate synchronously through the positioning rotating plate, so that the connecting support plate can drive the four groups of fixed sliding plates to displace synchronously through the positioning connecting head. At the same time, the fixed sliding plates can be separated from the limiting device together. However, the compressor often generates relatively large noise during operation, which may interfere with the normal detection of the equipment and lead to inaccurate detection results. Summary of the Invention

[0003] In order to solve the problem that relatively large noise is often generated during operation, which may interfere with the normal detection of the equipment and lead to inaccurate detection results, the present invention proposes a direct-current variable-frequency silent compressor with internal air intake.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a direct-current variable-frequency silent compressor with internal air intake, including a machine body. An intake sound insulation plate is fixedly connected to the side end of the machine body. An A cavity is provided between the intake sound insulation plate and the machine body. An eccentric wheel intake cavity is fixedly connected to one end of the A cavity close to the machine body. A B cavity is provided at one end of the machine body far from the A cavity. Intake ports one are fixedly provided at both ends of the machine body. An intake port two is provided at one end of the machine body far from the intake port one. An air outlet one is provided on one side of the top end of the machine body close to the A cavity. An air outlet two is provided at one end of the machine body far from the air outlet one.

[0005] Preferably, the intake sound insulation plate and the machine body are hermetically connected through a sealing ring to ensure that the A cavity and the B cavity are in a sealed state during operation.

[0006] Preferably, the first air inlet and the second air inlet are respectively located on both sides of the body and are symmetrically distributed. The first air outlet and the second air outlet are located at the top of the body and are respectively communicated with the A chamber and the B chamber.

[0007] Preferably, the body is made of carbon fiber reinforced polymer.

[0008] Preferably, the inner walls of the A chamber and the B chamber are covered with porous sound-absorbing materials.

[0009] The beneficial effects of the present invention are as follows: 1. The present invention utilizes the communication structure between the first air inlet, the second air inlet and the A chamber, the B chamber. There are two air inlets on both sides of the body. The first air inlet and the second air inlet can make the gas provided by the compressor more, reduce the pressure of the compressor, and thus reduce the noise. The first air inlet and the second air inlet are respectively communicated with the eccentric wheel air inlet chambers A and B. Air inlet sound insulation plates are arranged outside the A chamber and the B chamber to prevent gas leakage. Sealing rings are arranged on the air inlet sound insulation plates. After assembly, the A chamber and the B chamber are in a sealed state on the air inlet sound insulation plate surface, which can effectively reduce the operating noise of the compressor motor. The gas flows upward from the A chamber and the B chamber of the air inlet chamber to the compressor air outlet; 2. The present invention utilizes the elastic sealing characteristics of the sealing ring to always maintain good sealing performance in the dynamic environment of the compressor operation, block the gas leakage channel and the noise propagation path, and achieve the purpose of reducing gas leakage and noise propagation. Secondly, based on the symmetrical structure design, the pressure difference is used to make the gas evenly enter the two side chambers, maintain the pressure balance in the chamber, ensure the stable operation of the compressor, and at the same time reduce component wear. Utilizing the upward flow characteristics of the gas and the direct communication structure between the air outlet and the chamber, the gas discharge resistance is reduced, and efficient output of compressed gas is achieved; 3. The present invention reduces the inertia and weight of the body by using lightweight materials, reduces the vibration generated by inertia and the resonance caused by weight, thereby reducing the mechanical vibration during operation. According to the relationship between the motor speed and the power supply frequency and voltage, the motor speed is controlled by adjusting the power supply parameters to meet different load requirements and achieve energy saving. Secondly, using the stable torque output characteristics of the DC variable frequency motor to reduce motor vibration and achieve the purpose of noise reduction. Utilizing the special microstructure of the porous sound-absorbing material, the energy of the noise wave is continuously dissipated when propagating in it, realizing the function of absorbing noise and reducing the impact of noise on the surrounding environment. By means of the heat dissipation structure to increase the heat dissipation area or forced air flow, the heat transfer speed from the compressor body to the surrounding environment is accelerated, and the normal working temperature of the compressor is maintained. Description of the Drawings

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the connection of the eccentric wheel intake cavity of the present invention; Figure 3 Schematic diagram of the top connection of the body of the present invention; Figure 4 Schematic diagram of the connection side of the first intake port of the present invention; Figure 5 Schematic diagram of the front connection of the A cavity of the present invention.

[0012] In the figure: 1, body; 2, intake sound insulation board; 3, A cavity; 4, eccentric wheel intake cavity; 5, B cavity; 6, first intake port; 7, second intake port; 8, first outlet port; 9, second outlet port. Specific embodiments

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0014] Embodiment 1 Please refer to Figures 1-5 As shown, a direct current variable frequency silent compressor with internal intake includes a body 1. An intake sound insulation board 2 is fixedly connected to the side end of the body 1. An A cavity 3 is formed between the intake sound insulation board 2 and the body 1. An eccentric wheel intake cavity 4 is fixedly connected to one end of the A cavity 3 close to the body 1. A B cavity 5 is formed at one end of the body 1 away from the A cavity 3. First intake ports 6 are fixedly formed at both ends of the body 1. A second intake port 7 is formed at one end of the body 1 away from the first intake ports 6. A first outlet port 8 is formed on one side of the top of the body 1 close to the A cavity 3. A second outlet port 9 is formed at one end of the body 1 away from the first outlet port 8; For example, under the action of the pressure difference generated by the operation of the compressor, external gas enters from air inlet 1 6 and air inlet 2 7 respectively. The gas entering air inlet 1 6 flows into cavity A, and the gas entering air inlet 2 7 flows into cavity B. The gas flows in the cavity and is finally discharged from air outlet 1 8 and air outlet 2 9, thereby realizing efficient gas compression.

[0015] Furthermore, the air inlet sound insulation board 2 and the body 1 are sealed by a sealing ring to ensure that the A cavity 3 and the B cavity 5 are in a closed state during operation; For example, when the compressor is running, with the changes in internal gas pressure and the vibration of mechanical parts, the sealing ring will undergo a certain degree of elastic deformation and always fit tightly with the air intake sound insulation plate 2 and the body 1. In this way, whether under high pressure or low pressure, it can effectively prevent gas leakage in chamber A and chamber B. At the same time, the noise generated by the internal mechanical parts during operation will be blocked by the sealing ring and cannot be directly transmitted to the external environment, thereby significantly improving the quietness of the compressor.

[0016] Furthermore, the air inlet 1 6 and the air inlet 2 7 are respectively located on both sides of the body 1 and are symmetrically distributed, and the air outlet 1 8 and the air outlet 2 9 are located at the top of the body 1 and are connected to the A cavity 3 and the B cavity 5 respectively; For example, since the air inlet 1 6 and the air inlet 2 7 are symmetrically distributed, during the operation of the compressor, the external gas can enter the A chamber and the B chamber simultaneously and in equal amounts under the same pressure difference conditions, which makes the gas pressure in the A chamber and the B chamber always remain relatively balanced, avoiding pressure fluctuations caused by differences in the intake volume. The uniform gas input can also make the compression components inside the compressor more evenly stressed, reduce component wear, and extend the service life of the compressor. The high-pressure gas compressed inside the compressor flows upward under the action of pressure. Since the air outlet 1 8 and the air outlet 2 9 are directly connected to the A chamber and the B chamber respectively, and are located at the top of the body 1, they conform to the natural trend of the gas to flow upward, reducing the resistance of the gas during the discharge process. This structural design enables the compressed gas to be discharged quickly and smoothly from the air outlet 1 8 and the air outlet 2 9, thereby improving the gas output efficiency.

[0017] Furthermore, the body 1 is made of carbon fiber reinforced polymer, the body 1 is driven by a DC variable frequency motor, and the overall design of the body 1 is modular; Exemplarily, the body 1 is made of lightweight materials (such as epoxy resin) to reduce the overall weight and mechanical vibration during operation. During the operation of the compressor, the body 1 made of lightweight materials has less inertia. When the motor drives the compressor to operate, the smaller inertia makes the mechanical vibration generated by the body 1 smaller during startup, stop, and speed change. At the same time, due to the reduction of the overall weight, the pressure on the installation base is also correspondingly reduced, avoiding the resonance problem of the installation base caused by excessive weight, and further reducing the vibration energy transmitted to the outside during the operation of the compressor. The compressor is driven by a DC variable-frequency motor, and the speed is controlled by adjusting the frequency and voltage of the input power supply to achieve the purpose of energy saving and noise reduction. In the actual use scenario, according to the load demand of the compressor, the control system will adjust the power frequency and voltage of the input DC variable-frequency motor in real time. When the load is low, the power frequency and voltage are reduced, the motor speed decreases, and the compression volume of the compressor decreases, thereby reducing energy consumption; when the load increases, the power frequency and voltage are increased, the motor speed increases to meet the compression demand. At the same time, the operating characteristics of the DC variable-frequency motor make the output torque more stable during the speed regulation process, reducing the vibration of the motor itself, and thus reducing the noise generated during the operation of the compressor.

[0018] Furthermore, an intake sound insulation board (2) is provided to separate the operating sound of the motor and prevent the noise from spreading out, achieving the effect of reducing noise propagation. Exemplarily, when the gas flows in the A chamber and the B chamber, and the internal mechanical components of the compressor generate noise, the noise wave propagates to the inner wall of the chamber. The intake sound insulation board is provided with a sealed special structure to prevent the noise wave from spreading outwards. It is continuously reflected and refracted between the intake sound insulation board and the chamber, and the energy is gradually consumed and converted into other forms of energy such as heat energy, thereby effectively absorbing the noise and reducing the intensity of the noise spreading outwards.

[0019] Working principle: First, utilize the connection structure of the first intake port 6 and the second intake port 7 with the A chamber and the B chamber. There are two intake ports on both sides of the body 1. The first intake port 6 and the second intake port 7 can provide more gas for the compressor, reduce the pressure of the compressor, and thus reduce the noise. The first intake port 6 and the second intake port 7 are respectively communicated with the A chamber 3 of the eccentric wheel intake cavity 4 and the B chamber 5 at the other end. The intake sound insulation board 2 is arranged outside the A chamber 3 and the B chamber 5 at the other end to prevent gas leakage. The intake sound insulation board 2 is provided with a sealing ring. After assembly, the A chamber 3 and the B chamber 5 are in a sealed state on the surface of the intake sound insulation board 2, which can effectively reduce the operating noise of the compressor motor. Gas flows upward from Chamber 3 of the A chamber and Chamber 5 of the other end of the eccentric wheel intake cavity 4 to the compressor outlet. Then, by utilizing the elastic sealing property of the sealing ring, in the dynamic environment of the compressor operation, good sealing performance is always maintained, blocking the gas leakage channel and the noise propagation path, achieving the purpose of reducing gas leakage and noise propagation. Secondly, based on the symmetric structure design, the pressure difference is used to make the gas evenly enter the two side cavities, maintaining the pressure balance in the cavity, ensuring the stable operation of the compressor, and at the same time reducing component wear. By utilizing the upward flow characteristic of the gas and the direct connection structure between the outlet and the cavity, the gas discharge resistance is reduced, achieving efficient output of compressed gas. Then, by using lightweight materials, the inertia and weight of the machine body 1 are reduced, reducing the vibration generated by inertia and the resonance caused by weight, thereby reducing the mechanical vibration during operation. According to the relationship between the motor speed and the power supply frequency and voltage, the motor speed is controlled by adjusting the power supply parameters to meet different load requirements and achieve energy conservation. Next, by utilizing the stable torque output characteristic of the DC variable-frequency motor, the motor vibration is reduced to achieve the purpose of noise reduction. By using the special microstructure of the porous sound-absorbing material, the energy of the noise wave is continuously lost during its propagation therein, realizing the function of absorbing noise and reducing the impact of noise on the surrounding environment. By means of the heat dissipation structure to increase the heat dissipation area or force air flow, the heat transfer speed from the compressor body 1 to the surrounding environment is accelerated, maintaining the normal working temperature of the compressor. Finally, based on the modular design concept, the precise connection and cooperation between modules are used to reduce noise generation; through the independence of the modules, convenient and fast disassembly and maintenance operations are realized.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A direct current variable frequency quiet compressor with internal air intake, characterized in that, It includes a body (1), an intake sound insulation panel (2) is fixedly connected to the side end of the body (1), an A chamber (3) is formed between the intake sound insulation panel (2) and the body (1), an eccentric wheel intake cavity (4) is fixedly connected to one end of the A chamber (3) close to the body (1), a B chamber (5) is formed at one end of the body (1) away from the A chamber (3), intake ports one (6) are fixedly formed at both ends of the body (1), an intake port two (7) is formed at one end of the body (1) away from the intake port one (6), an air outlet one (8) is formed on one side of the top of the body (1) close to the A chamber (3), and an air outlet two (9) is formed at one end of the body (1) away from the air outlet one (8).

2. The DC variable frequency silent compressor with internal air intake according to claim 1, wherein: The intake sound insulation panel (2) and the body (1) are hermetically connected through a sealing ring to ensure that the A chamber (3) and the B chamber (5) are in a sealed state during operation.

3. The DC variable-frequency quiet compressor with internal air intake according to claim 1, wherein: The intake port one (6) and the intake port two (7) are respectively located on both sides of the body (1) and are symmetrically distributed, and the air outlet one (8) and the air outlet two (9) are located at the top of the body (1) and are respectively communicated with the A chamber (3) and the B chamber (5).

4. The DC variable frequency silent compressor with internal air intake according to claim 1, wherein: The body (1) is made of carbon fiber reinforced polymer.

5. A direct-current variable-frequency quiet compressor with internal air intake according to claim 1, characterized in that: The inner walls of the A chamber (3) and the B chamber (5) are covered with porous sound-absorbing materials.

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