CN219605535U - Oil injection air compressor - Google Patents

Abstract

The utility model discloses an oil injection air compressor which comprises a compressor component, an oil gas barrel, an oil cooling component, a post-cooling component and a controller. The oil gas bucket is connected to the compressor assembly for separating the oil gas mixture provided by the compressor assembly. The oil circulation has fluid between compressor assembly and the oil gas bucket, and the oil cooling subassembly is connected in compressor assembly and oil gas bucket for the cooling fluid. The post-cooling component is connected to the oil-gas barrel and used for cooling the compressed gas separated from the oil-gas barrel. The controller is in signal connection with the compressor component, the oil-gas barrel, the oil cooling component and the post-cooling component, and is used for controlling the oil cooling component to be in an energy-saving running state according to a state switching signal, and the post-cooling component is in a stop state or a lowest rotating speed running state. The state switching signal is that the oil injection air compressor is switched from a heavy vehicle state to an empty vehicle state. The oil injection air compressor provided by the embodiment of the utility model can improve the cooling effect and the energy consumption.

Description

Oil injection air compressor

Technical Field

The embodiment of the utility model relates to the technical field of air compressors, in particular to an oil injection air compressor.

Background

An air compressor (simply referred to as an "air compressor") is a device for compressing a gas. The air compressor is capable of providing compressed gas to a user end for use by the user end.

When the air volume demand of the user end is reduced, the air compressor can be switched from the heavy vehicle state to the empty vehicle state. However, the air compressor of the related art has high power consumption, which is disadvantageous in terms of energy saving.

Disclosure of Invention

The embodiment of the utility model provides an oil injection air compressor capable of improving oil gas cooling efficiency and energy consumption.

The oil injection air compressor comprises a compressor component, an oil gas barrel, an oil cooling component, a post-cooling component and a controller, wherein the compressor component is used for compressing gas; the oil-gas barrel is connected with the compressor assembly and is used for separating an oil-gas mixture provided by the compressor assembly; oil liquid circularly flows between the compressor component and the oil gas barrel; the oil cooling assembly is connected with the compressor assembly and the oil gas barrel and used for cooling the oil liquid; the post-cooling component is connected with the oil-gas barrel and used for cooling the compressed gas separated from the oil-gas barrel; the controller is in signal connection with the compressor component, the oil-gas barrel, the oil cooling component and the post-cooling component and is used for controlling the oil cooling component to be in an energy-saving running state according to a state switching signal, and the post-cooling component is in a stop state or a lowest rotating speed running state;

The state switching signal is that the oil injection air compressor is switched from a heavy vehicle state to an empty vehicle state.

One embodiment of the above utility model has at least the following advantages or benefits:

according to the oil injection air compressor disclosed by the embodiment of the utility model, the oil cooling component is connected with the compressor component and the oil-gas barrel so as to cool oil circularly flowing between the compressor component and the oil-gas barrel, and the post-cooling component is connected with the oil-gas barrel so as to cool compressed gas separated from the oil-gas barrel.

In addition, the oil cooling assembly and the rear cooling assembly are independently arranged, so that the mutual interference of the two cooling assemblies can be avoided, the cooling effect is influenced, and the design of the air inlet and the air outlet on the outer cover enables air to discharge the operation heat of the oil injection air compressor in the flow direction of side in-in and out or side in-side (upper) out, and the heat dissipation effect can be greatly improved. And because the oil cooling assembly and the rear cooling assembly are independently arranged and are respectively connected with the controller through signals, the controller can control the oil cooling assembly to be in an energy-saving running state according to signals of the air compressor from a heavy vehicle state to an empty vehicle state, and the rear cooling assembly is in a stop state. Therefore, the oil cooling assembly is controlled by the controller to be in an energy-saving running state, the post-cooling assembly is in a stop state or a lowest rotating speed running state, and the energy consumption can be reduced on the basis of meeting the normal running of the air compressor.

Drawings

Fig. 1 is a schematic perspective view of an oil-injected air compressor according to an embodiment of the present utility model, in which an outer cover is omitted.

Fig. 2 shows a schematic front view of fig. 1.

Fig. 3 shows a schematic top view of fig. 1.

Fig. 4 shows a schematic rear view of fig. 1.

Fig. 5 shows a right-hand schematic view of fig. 1.

Fig. 6 shows a schematic left-hand view of fig. 1.

Fig. 7 is a schematic perspective view of an oil-injected air compressor with a cover according to an embodiment of the present utility model.

Fig. 8 shows a schematic front view of fig. 7.

Fig. 9 shows a schematic rear view of fig. 7.

Fig. 10 shows a schematic top view of fig. 7.

Fig. 11 shows a right-hand schematic view of fig. 7.

Fig. 12 is a system flow chart of an oil injection air compressor according to an embodiment of the present utility model.

Fig. 13 shows a block diagram of an electronic device of an exemplary embodiment of the utility model.

Wherein reference numerals are as follows:

10. base seat

20. Outer cover

210. Top wall

211. First air outlet

212. Second air outlet

220. First side wall

221. First air inlet

230. A second side wall

231. Second air inlet

240. A third side wall

250. Fourth side wall

30. Compressor assembly

310. Compressor body

320. Main motor

330. Oil temperature sensor

40. Oil gas barrel

410. Pressure maintaining valve

50. Oil cooling assembly

510. Oil-cooled heat exchanger

520. Oil cooling fan

530. Oil-cooled motor

540. Oil cooling pipeline

60. Post-cooling assembly

610. Post-cooling heat exchanger

620. Rear cooling fan

630. Post-cooling motor

640. Compressed gas temperature sensor

70. Controller for controlling a power supply

810. Safety valve

820. Start plate

830. Air inlet filter

840. Frequency converter

850. Air inlet valve

860. Relief valve

870. Flow regulating valve

880. Oil filter

891. Pressure sensor

892. Temperature sensor

90. Oil fine separator

P1, oil flow path

P2 and gas flow path

D1, left-right direction

D2, front-rear direction

D3, up-down direction

D11, first direction

D12, second direction

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

As shown in fig. 1 to 7, the oil-injected air compressor of the embodiment of the present utility model includes a base 10, an outer cover 20, a compressor assembly 30, an oil and gas tank 40, an oil cooling assembly 50, an after cooling assembly 60, and a controller 70. The compressor assembly 30 is configured to compress a gas, and the oil and gas tank 40 is coupled to the compressor assembly 30 for separating an oil and gas mixture provided by the compressor assembly 30. Oil circulates between the compressor assembly 30 and the oil and gas tank 40. An oil cooling assembly 50 is connected to the compressor assembly 30 and the oil and gas tank 40 for cooling the oil. The aftercooling assembly 60 is connected to the oil and gas tank 40 for cooling the compressed gas separated from the oil and gas tank 40. The controller 70 is in signal connection with the compressor assembly 30, the oil and gas tank 40, the oil cooling assembly 50 and the after-cooling assembly 60, and is used for controlling the oil cooling assembly 50 to be in an energy-saving operation state and the after-cooling assembly 60 to be in a stop state or a minimum rotation speed operation state according to a state switching signal. The state switching signal is that the oil injection air compressor is switched from a heavy vehicle state to an empty vehicle state.

It will be understood that the terms "comprising," "including," and "having," and any variations thereof, are intended to cover non-exclusive inclusions in the embodiments of the utility model. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

In this embodiment, the oil cooling assembly 50 is connected to the compressor assembly 30 and the oil-gas barrel 40 for cooling the oil circulating between the compressor assembly 30 and the oil-gas barrel 40, and the post-cooling assembly 60 is connected to the oil-gas barrel 40 for cooling the compressed gas separated from the oil-gas barrel 40, and the oil cooling assembly 50 and the post-cooling assembly 60 are independently arranged, so that the cooling between the oil path and the gas path is not affected, and the cooling effect of the oil and the compressed gas is ensured.

In addition, since the oil cooling assembly 50 and the post-cooling assembly 60 are independently provided and respectively connected with the controller 70 by signals, the controller 70 can respectively control the working states of the oil cooling assembly 50 and the post-cooling assembly 60 according to the state of the air compressor, so that the operation is more flexible. For example, the controller 70 can control the oil cooling assembly 50 to be in the energy-saving operation state and the post-cooling assembly 60 to be in the stop state or the lowest rotation speed operation state according to the signal of the air compressor switching from the heavy vehicle state to the empty vehicle state, wherein the air compressor is not required to provide compressed air to the outside, so the post-cooling assembly 60 can be in the stop state or the lowest rotation speed operation state, and in the empty vehicle state, in order to ensure the normal operation of the air compressor, the oil still circulates between the compressor assembly 30 and the oil and gas tank 40, so the oil cooling assembly 50 is required to be in the energy-saving operation state to cool the oil. In this way, the controller 70 controls the oil cooling assembly 50 to be in the energy-saving operation state, and the post-cooling assembly 60 to be in the stop state or the lowest rotation speed operation state, so that the energy consumption can be reduced on the basis of meeting the normal operation of the air compressor. The lowest rotational speed operating state may also be referred to as a lowest frequency operating state, in which the rotational speed is less than the highest rotational speed of the aftercooled motor 630 and may be up to 40% of the highest rotational speed.

Referring to fig. 7 to 11, the cover 20 is covered on the base 10, and the cover 20 and the base 10 together form a containing space. The compressor assembly 30, the oil and gas tank 40, the oil cooling assembly 50, the post-cooling assembly 60 and the controller 70 are all disposed in the accommodating space formed by the housing 20 and the base 10, and are covered by the housing 20.

The housing 20 includes a top wall 210, a first sidewall 220, a second sidewall 230, a third sidewall 240, and a fourth sidewall 250. The first sidewall 220 and the second sidewall 230 are disposed opposite to each other along a left-right direction D1 (the direction indicated by the arrow is left and the opposite direction is right), and the first sidewall 220 and the second sidewall 230 are respectively connected to two opposite sides of the base 10. The third sidewall 240 and the fourth sidewall 250 are disposed opposite to each other along the front-rear direction D2 (the direction indicated by the arrow is front and the reverse direction is rear), and the third sidewall 240 and the fourth sidewall 250 are respectively connected to the other two opposite sides of the base 10. And, the third sidewall 240 is connected to the first and second sidewalls 220 and 230, and the fourth sidewall 250 is connected to the first and second sidewalls 220 and 230. The top wall 210 is disposed opposite to the base 10 along an up-down direction D3 (the direction indicated by the arrow is up and the reverse direction is down), and the top wall 210 is connected to the first side wall 220, the second side wall 230, the third side wall 240 and the fourth side wall 250, respectively.

The controller 70 is in signal connection with the compressor assembly 30, the oil and gas tank 40, the oil cooling assembly 50 and the post cooling assembly 60 for controlling the operation of the compressor assembly 30, the oil and gas tank 40, the oil cooling assembly 50 and the post cooling assembly 60, respectively.

It is to be understood that the term "signal connection" may be a wired connection or a wireless connection, wherein the wireless connection may include a wifi connection, a bluetooth connection, etc.

As shown in fig. 4, the compressor assembly 30 may include a compressor body 310 and a main motor 320, the main motor 320 being drivingly connected to the compressor body 310. The main motor 320 is in signal connection with the controller 70.

It is understood that the compressor body 310 may be a screw compressor. The oil circulated between the compressor assembly 30 and the oil and gas tank 40 is used to seal, cool and lubricate the screw compressor.

As shown in fig. 1, 3 and 5, the oil cooling assembly 50 includes an oil-cooled heat exchanger 510, an oil cooling fan 520 and an oil-cooled motor 530. An oil-cooled heat exchanger 510 is coupled to the compressor assembly 30 and the oil and gas tank 40 for heat exchange with the oil. The oil cooling fan 520 is disposed at one side of the oil cooling heat exchanger 510, and is used for discharging heat generated by the oil cooling heat exchanger 510. The oil cooling motor 530 is a variable frequency motor, and the oil cooling motor 530 is drivingly connected to the oil cooling fan 520. The controller 70 is in signal connection with the oil-cooled motor 530, and is configured to control the oil-cooled motor 530 to be in a low-frequency operation state according to the state switching signal.

It is understood that the oil-cooled heat exchanger 510 is connected to the compressor body 310 and the oil and gas tank 40 through pipes, respectively, and oil can circulate among the oil-cooled heat exchanger 510, the compressor body 310 and the oil and gas tank 40 through the pipes.

The oil cooling motor 530 can drive the oil cooling fan 520 to rotate, and cold air can pass through the oil cooling heat exchanger 510 under the action of the oil cooling fan 520, so that the oil in the oil cooling heat exchanger 510 exchanges heat with the cold air, and finally the purpose of cooling the oil is achieved.

When the air compressor is in different working states, the state in which the controller 70 controls the oil cooling motor 530 is also different. Specifically, when the air compressor is in the heavy-duty state, the controller 70 controls the oil-cooled motor 530 to be in the rated-frequency operation state, and the rotational speed of the motor is high at this time, so as to improve the cooling effect. When the air compressor is switched from the heavy state to the empty state, the controller 70 controls the oil cooling motor 530 to be in a low-frequency working state, and the rotating speed of the motor is low at the moment, so that energy is saved on the premise of ensuring a certain cooling effect.

Further, when the air compressor is switched from the heavy state to the empty state, the controller 70 controls the oil cooling motor 530 to be in the lowest frequency operation state to maximize energy saving.

As shown in fig. 1, 3 and 5, the post-cooling assembly 60 includes a post-cooling heat exchanger 610, a post-cooling fan (not shown) and a post-cooling motor 630, wherein the post-cooling heat exchanger 610 is connected to the oil and gas barrel 40 for exchanging heat with the compressed gas separated from the oil and gas barrel 40, and the post-cooling fan is disposed at one side of the post-cooling heat exchanger 610 for exhausting heat generated by the post-cooling heat exchanger 610. The rear cooling motor 630 may be a variable frequency motor or a fixed frequency motor, and the rear cooling motor 630 is in driving connection with a rear cooling fan. The controller 70 is in signal connection with the post-cooling motor 630, and is used for controlling the post-cooling motor 630 to be in a stop state or a minimum rotation speed running state according to the state switching signal. The lowest rotational speed operating state may also be referred to as a lowest frequency operating state, in which the rotational speed is less than the highest rotational speed of the aftercooled motor 630 and may be up to 40% of the highest rotational speed.

It will be appreciated that the after-cooling heat exchanger 610 is connected to the oil and gas tank 40 through a pipeline so that the compressed gas separated from the oil and gas tank 40 can flow to the after-cooling heat exchanger 610 through the pipeline for heat exchange. As an example, the top of the oil and gas tank 40 is provided with a pressure maintenance valve 410, and the after-cooling heat exchanger 610 is connected to the pressure maintenance valve 410 through a pipe. The pressure maintenance valve 410 is used to maintain the pressure of the compressed gas flowing from the oil and gas tank 40.

The rear cooling motor 630 can drive the rear cooling fan to rotate, and cold air can pass through the rear cooling heat exchanger 610 through the effect of the rear cooling fan so as to realize heat exchange between compressed gas in the rear cooling heat exchanger 610 and cold air, and finally achieve the purpose of cooling the compressed gas.

The controller 70 can independently control the start and stop of the oil cooling motor 530 and the rear cooling motor 630, so when the air compressor is in an empty state, the air compressor does not need to provide compressed gas outwards at this time, and the controller 70 can control the rear cooling motor 630 to stop, and the oil cooling motor 530 is not affected to be in the lowest frequency working state.

The oil-injected air compressor of the embodiment of the utility model further comprises a safety valve 810, a starting disk 820 and an air inlet filter 830. The safety valve 810 is installed on the oil and gas barrel 40 to ensure the safety of the oil and gas barrel 40. The start-up disc 820 is used for collecting, processing and transmitting the working state information of the oil injection air compressor, and controlling and protecting according to the collected working state information. An intake filter 830 is installed on the compressor body 310 for filtering air sucked into the compressor body 310 to prevent foreign objects from entering the compressor body 310.

As an option, the oil-spraying air compressor of the embodiment of the utility model further includes a frequency converter 840, where the frequency converter 840 is matched with the main motor 320, and is used for performing frequency adjustment according to a signal provided by the controller 70, so as to implement a frequency conversion function of the main motor 320.

As shown in fig. 1 and 4, the compressor assembly 30 is mounted on the base 10, the post-cooling assembly 60 is disposed above the compressor assembly 30, and the post-cooling assembly 60 is disposed near the inner wall surface of the top wall 210. The aftercooling assembly 60 may be mounted at any location on the top wall 210. Further, the after-cooling assembly 60 is disposed directly above the compressor assembly 30. By disposing the post-cooling assembly 60 above the compressor assembly 30, the space utilization in the up-down direction D3 inside the air compressor can be improved.

The oil cooling assembly 50 and the post-cooling assembly 60 are disposed on different walls of the housing 20. In an embodiment of the present utility model, the oil cooling assembly 50 and the post-cooling assembly 60 are disposed on any two different walls of the first side wall 220, the second side wall 230, the third side wall 240, the fourth side wall 250 and the top wall 210 of the housing 20. While the oil cooling assembly 50 and the after-cooling assembly 60 are not mounted on the same wall as the electronic control elements (e.g., controller 70, start-up disk 820, frequency converter 840, etc.). In other words, the oil cooling assembly 50, the after-cooling assembly 60 and the electrical control elements are disposed on three different walls of the housing 20. In the embodiment of the utility model, the oil cooling assembly 50 is disposed on the inner side of the first sidewall 220, and the post-cooling assembly 60 is disposed on the inner side of the second sidewall 230. That is, the oil cooling assembly 50 is disposed opposite to the rear cooling assembly 60 along the left-right direction D1, and the oil cooling assembly 50 is disposed at the right side of the inside of the air compressor, and the rear cooling assembly 60 is disposed at the left side of the inside of the air compressor.

Further, when the rear cooling unit 60 is disposed adjacent to four sides of the top wall 210 of the housing 20, the rear cooling unit 60 may be disposed on the inner side of any one or both of the first side wall 220, the second side wall 230, the third side wall 240, and the fourth side wall 250. In addition, the post-cooling assembly 60 may be disposed only on the inner side of any one or both of the first side wall 220, the second side wall 230, the third side wall 240, and the fourth side wall 250 of the housing 20, and at a specific distance from the top wall 210.

Of course, it is understood that in other embodiments, the oil cooling assembly 50 may be disposed on any of the second, third, or fourth sidewalls 230, 240, 250.

The compressor assembly 30 is disposed on an inner side surface of the second sidewall 230, and along the left-right direction D1 (i.e., a direction of spacing between the first sidewall 220 and the second sidewall 230), the compressor assembly 30 is disposed opposite to the oil cooling assembly 50. The main motor 320 is connected to the compressor body 310 in a first direction D11, and the oil cooling assembly 50 extends in a second direction D12, the first direction D11 being parallel to the second direction D12.

As can be seen from fig. 1, the post-cooling assembly 60 is disposed above the compressor assembly 30 along the up-down direction D3, and the post-cooling assembly 60 and the compressor assembly 30 are disposed at the left side of the inside of the air compressor. Along the left-right direction D1, the oil cooling assembly 50 is disposed opposite to the rear cooling assembly 60, and the oil cooling assembly 50 is disposed on the right side inside the air compressor. Along the front-rear direction D2, the oil and gas barrel 40 is disposed opposite to the oil cooling assembly 50, and the oil cooling assembly 50 is located at the front side of the air compressor, and the oil and gas barrel 40 is located at the rear side of the air compressor. Through the layout, the space utilization rate inside the air compressor can be effectively improved, and the size of the air compressor is reduced.

As shown in fig. 7 to 11, the first sidewall 220 is provided with a first air inlet 221, and the first air inlet 221 corresponds to the position of the oil cooling assembly 50. The second sidewall 230 is provided with a second air inlet 231, and the second air inlet 231 corresponds to the position of the rear cooling assembly 60. The top wall 210 is provided with a first air outlet 211 and a second air outlet 212, wherein the first air outlet 211 corresponds to the position of the oil cooling assembly 50, and the second air outlet 212 corresponds to the position of the post-cooling assembly 60.

As an example, the cooling flow path of the oil cooling assembly 50 assembled with the housing 20 is: cool air enters from the side of the housing 20 and is discharged from above the housing 20. In the embodiment of the present utility model, the cold air for cooling the oil enters the air compressor through the first air inlet 221 of the housing 20, and is changed into hot air after heat exchange of the oil cooling assembly 50, and the hot air is discharged through the first air outlet 211 of the housing 20. It will be appreciated that the cooling flow path direction of the oil cooling assembly 50 is related to the blowing direction of the oil cooling fan 520.

As an example, the cooling flow path of the post-cooling assembly 60 assembled with the housing 20 is: cool air enters from the side of the housing 20 and exits from the top/side of the housing 20. In the embodiment of the present utility model, the cold air for cooling the compressed air enters the air compressor through the second air inlet 231 of the housing 20, and is changed into hot air after heat exchange by the post-cooling assembly 60, and the hot air is discharged through the second air outlet 212 of the housing 20. It will be appreciated that the cooling flow path direction of the aft cooling module 60 is related to the direction of the aft cooling fan.

In other embodiments, the second air outlet 212 may also be formed in a sidewall of the housing 20 (e.g., the second air outlet 212 is formed in any one of the first, third, and fourth sidewalls 220, 240, 250), and the second air outlet 212 is proximate to the top wall 210 of the housing 20. In other words, the second air outlet 212 is formed at a side wall of the housing 20 and near the top wall 210.

That is, the cooling flow path of the oil cooling assembly 50 is a side-in-up-out, and the cooling flow path of the after-cooling assembly 60 is a side-in-up-out or a side-in-side (upper) out.

Referring back to fig. 1, in the up-down direction D3, the post-cooling assembly 60 is disposed opposite the compressor assembly 30, and the post-cooling assembly 60 is disposed adjacent the compressor assembly 30. Further, an after-cooling assembly 60 is disposed above the compressor assembly 30. As such, the after-cooling assembly 60 may be used to regulate the discharge temperature of the compressor assembly 30 and to dissipate heat generated during operation of the compressor assembly 30.

In one embodiment, the rear cooling fan of the rear cooling assembly 60 is an axial fan, which corresponds to the position of the second air outlet 212. The rear cooling fan is designed as an axial flow fan so as to control the discharge direction of the radiating air.

As shown in fig. 1, in the left-right direction D2, the oil cooling assembly 50 is disposed opposite to the oil drum 40, and the oil cooling assembly 50 is disposed adjacent to the oil drum 40. As such, the oil cooling assembly 50 may be used to regulate the oil temperature of the oil and gas tank 40.

In one embodiment, the oil cooling fan 520 of the oil cooling assembly 50 is a centrifugal fan, and the centrifugal fan corresponds to the position of the first air outlet 211. The oil cooling fan 520 is designed as a centrifugal fan, so that the cooling flow passage of the oil cooling assembly 50 can be a side inlet and a side outlet, and the internal space of the air compressor is saved.

Therefore, the integral air duct of the oil injection air compressor of the embodiment of the utility model is as follows: the cold air side and the hot air upper outlet (the air outlet is arranged on the top wall)/the side outlet (the air outlet is arranged on the upper side of the side wall) so as to improve the overall heat dissipation efficiency of the oil injection air compressor.

In another aspect of the present utility model, a method for controlling any one of the above-mentioned oil-injected air compressors is provided, including: acquiring a state switching signal, wherein the state switching signal is that the oil injection air compressor is switched from a heavy vehicle state to an empty vehicle state; based on the state switching signal, the oil cooling assembly 50 is controlled to be in the energy-saving operation state, and the after-cooling assembly 60 is controlled to be in the shutdown state or the lowest rotational speed operation state. The lowest rotational speed operating state may also be referred to as a lowest frequency operating state, in which the rotational speed is less than the highest rotational speed of the aftercooled motor 630 and may be up to 40% of the highest rotational speed.

It is understood that the post-cooling motor 630 of the post-cooling assembly 60 may be a variable frequency motor or a fixed frequency motor, and the control method of the oil-spraying air compressor will be described below when the post-cooling motor 630 is a variable frequency motor or a fixed frequency motor.

When the oil-cooled motor 530 and the post-cooled motor 630 are both variable frequency motors:

a1, obtaining the oil temperature of the oil injection air compressor in a heavy vehicle state, and when the oil temperature is greater than the set oil temperature, increasing the rotating speed of an oil cooling fan; when the oil temperature is less than or equal to the oil set temperature, the rotating speed of the oil cooling fan is reduced; the set temperature of the oil is higher than the dew point temperature, so that the safety control requirement is met. Wherein the oil temperature is measured by an oil temperature sensor 330 disposed at the discharge outlet of the compressor assembly 30.

After the controller 70 obtains the oil temperature, the frequency of the oil cooling motor 530 is adjusted according to the ratio of the oil temperature to the set oil temperature, so as to adjust the rotation speed of the oil cooling fan 520.

It should be noted that the term "dew point temperature" means: under the condition that the water vapor content in the air is unchanged and the air pressure is kept to be constant, the temperature when the air is cooled to be saturated is called dew point temperature. In the embodiment of the utility model, the controller can comprehensively calculate the dew point temperature according to the exhaust pressure, the ambient temperature and the ambient humidity.

The dew point temperature is different when the oil injection air compressor is in a heavy vehicle state and an empty vehicle state respectively. The dew point temperature is calculated based on the exhaust pressure, the ambient temperature and the ambient humidity. Referring to fig. 12, in the heavy vehicle state, the exhaust pressure is detected by the pressure sensor 891 behind the pressure maintaining valve 410 or the pressure sensor on the oil and gas tank 40; in the empty state, the exhaust pressure is detected by a pressure sensor on the barrel 40.

A2, obtaining the temperature of compressed gas when the oil injection air compressor is in a heavy vehicle state; when the temperature of the compressed gas is higher than the set temperature of the compressed gas, the rotating speed of the post cooling fan is increased; when the temperature of the compressed gas is less than or equal to the set temperature of the compressed gas, the rotating speed of the rear cooling fan is reduced;

specifically, after the controller 70 obtains the compressed gas temperature, the frequency of the rear cooling motor 630 is adjusted according to the ratio of the compressed gas temperature to the set temperature of the compressed gas, thereby adjusting the rotation speed of the rear cooling fan. The compressed gas temperature is measured by a compressed gas temperature sensor 640 disposed between the after-cooling assembly 60 and the exhaust port of the oil-injected air compressor system.

B1, obtaining the oil temperature when the oil injection air compressor is in an empty state; when the oil temperature is higher than the oil set temperature, the rotating speed of the oil cooling fan is increased; when the oil temperature is less than or equal to the oil set temperature, the rotating speed of the oil cooling fan is reduced;

And B2, when the oil injection air compressor is in an empty state, controlling the rear cooling motor 630 to stop or be in a lowest rotating speed running state (the lowest frequency working state, wherein the rotating speed is less than the highest rotating speed of the rear cooling motor 630 and the lowest rotating speed can reach 40% of the highest rotating speed).

When the oil-cooled motor 530 is a variable frequency motor and the post-cooled motor 630 is a fixed frequency motor:

a1, obtaining the oil temperature of the oil injection air compressor in a heavy vehicle state; when the oil temperature is higher than the oil set temperature, the rotating speed of the oil cooling fan is increased; when the oil temperature is less than or equal to the oil set temperature, the rotating speed of the oil cooling fan is reduced; wherein the oil temperature is measured by an oil temperature sensor 330 disposed at the discharge outlet of the compressor assembly 30.

A2, obtaining the temperature of compressed gas when the oil injection air compressor is in a heavy vehicle state; when the temperature of the compressed gas is higher than the set temperature of the compressed gas, controlling the rear cooling fan to start; when the temperature of the compressed gas is less than or equal to the set temperature of the compressed gas, the post-cooling fan is controlled to be turned off;

specifically, after the controller 70 obtains the temperature of the compressed gas, the controller selectively controls the on/off of the rear cooling motor 630 according to the ratio of the temperature of the compressed gas to the set temperature of the compressed gas, thereby controlling the on/off of the rear cooling fan. The compressed gas temperature is measured by a compressed gas temperature sensor 640 disposed between the after-cooling assembly 60 and the exhaust port of the oil-injected air compressor system.

B1, obtaining the oil temperature when the oil injection air compressor is in an empty state; when the oil temperature is higher than the oil set temperature, the rotating speed of the oil cooling fan is increased; when the oil temperature is less than or equal to the oil set temperature, the rotating speed of the oil cooling fan is reduced;

and B2, controlling the rear cooling motor 630 to stop when the oil injection air compressor is in an empty state.

As shown in fig. 12, fig. 12 is a system flow chart of the oil-injected air compressor according to the embodiment of the utility model. The oil flow path P1 is provided therein with an oil and gas tank 40, an oil cooling assembly 50, an oil filter 880 and a compressor assembly 30, wherein the oil and gas tank 40, the oil cooling assembly 50, the oil filter 880 and the compressor assembly 30 are connected by an oil cooling line 540 to form a circulation flow path. The oil cooling line 540 is not in communication with the after-cooling assembly 60.

An oil fines separator 90 may also be provided in the oil flowpath P1, the oil fines separator 90 being used to further separate oil and gas and to convey the separated oil back to the compressor assembly 30.

In the embodiment of the utility model, the oil flows clockwise along the direction indicated by the arrow on the oil flow path P1, the oil sequentially passes through the compressor assembly 30 and the oil-gas barrel 40 and then enters the oil cooling assembly 50, the oil cooling assembly 50 cools the oil, and the cooled oil returns to the compressor assembly 30 after impurities are filtered by the oil filter 880; in addition, the oil sequentially enters the oil and gas tank 40 and the oil separator 90 and is separated into liquid oil and gas, the liquid oil enters the compressor assembly 30 for the next cycle, and the gas enters the gas flow path P2.

The oil flow path P1 is further provided with a flow rate adjusting valve 870, and the controller 70 is in signal connection with the flow rate adjusting valve 870, and the controller 70 can control the opening of the flow rate adjusting valve 870 to adjust the flow rate of the oil in the oil flow path P1 and control the temperature of the oil injected into the compressor assembly 30.

The controller 70 may control the rotational speed of the oil cooling fan 520 of the oil cooling assembly 50. When the oil temperature is greater than the oil set temperature, the rotation speed of the oil cooling fan 520 is increased, and the heat exchange efficiency of the oil cooling heat exchanger 510 is improved. When the oil temperature is less than or equal to the oil set temperature, the rotation speed of the oil cooling fan 520 is reduced, and the heat exchange efficiency of the oil cooling heat exchanger 510 is reduced.

With continued reference to FIG. 12, an intake filter 830, an intake valve 850, a compressor assembly 30, an oil and gas tank 40, an oil separator 90, a pressure maintenance valve 410, and an after-cooling assembly 60 are disposed in the gas flow path P2.

The gas flows through the air inlet filter 830 and the air inlet valve 850 in sequence to reach the compressor assembly 30, the compressor assembly 30 compresses the gas, the compressed gas sequentially passes through the oil-gas barrel 40 and the oil fine separator 90 and then separates liquid oil and compressed gas, the liquid oil enters the oil flow path P1, the compressed gas sequentially passes through the pressure maintaining valve 410 and the post cooling assembly 60, the pressure maintaining valve 410 is used for maintaining the pressure of the compressed gas, the post cooling assembly 60 is used for cooling the compressed air, and the compressed gas cooled by the post cooling assembly 60 is discharged from the oil injection air compressor.

A bleed valve 860 is also provided in the gas flow path P2, and the bleed valve 860 is used to bleed off the gas in the gas flow path P2.

The controller 70 may control the rotational speed of the aft cooling fan 620 of the aft cooling assembly 60. When the temperature of the compressed gas is greater than the set temperature, the rotation speed of the rear cooling fan 620 is increased, and the heat exchange efficiency of the rear cooling heat exchanger 610 is improved. When the compressed gas temperature is less than or equal to the set temperature, the rotation speed of the rear cooling fan 620 is reduced or the rear cooling fan 620 is turned off, and the heat exchange efficiency of the rear cooling heat exchanger 610 is reduced.

The oil injection air compressor further comprises a pressure sensor 891 and a temperature sensor 892, and the controller 70 is respectively connected with the pressure sensor 891 and the temperature sensor 892 in a signal manner and is used for receiving a gas pressure signal and an ambient temperature signal.

Specifically, a pressure sensor 891 may be provided between the oil and gas tank 40 or the pressure maintenance valve 410 and the aftercooling assembly 60 for monitoring the pressure of the compressed gas. The temperature sensor 892 is used to monitor the ambient temperature.

With continued reference to fig. 12, the oil injection air compressor according to the embodiment of the present utility model further includes an oil temperature sensor 330 and a compressed gas temperature sensor 640. An oil temperature sensor 330 is disposed at the discharge outlet of the compressor assembly 30 for monitoring the temperature of the oil. The compressed gas temperature sensor 640 is disposed between the post-cooling assembly 60 and the exhaust port of the oil-injected air compressor system for monitoring the temperature of the compressed gas. It will be appreciated that depending on the temperature value of the compressed air provided to the client, the temperature monitored by the compressed air temperature sensor 640 may be used as a basis for the operation of the aftercooling assembly 60.

In yet another aspect of the present utility model, there is also provided a computer readable storage medium having stored thereon a program product capable of implementing the method described above in the present specification. In some possible embodiments, the various aspects of the utility model may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the utility model as described in the "exemplary methods" section of this specification, when said program product is run on the terminal device.

A program product for implementing the above-described method according to an embodiment of the present utility model may employ a portable compact disc read-only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present utility model is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The computer readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present utility model may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

In still another aspect of the present utility model, an electronic device capable of implementing the above method is also provided.

Those skilled in the art will appreciate that the various aspects of the utility model may be implemented as a system, method, or program product. Accordingly, aspects of the utility model may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.

An electronic device 1100 according to this embodiment of the utility model is described below with reference to fig. 13. The electronic device 1100 shown in fig. 13 is merely an example, and should not be construed as limiting the functionality and scope of use of embodiments of the present utility model.

As shown in fig. 13, the electronic device 1100 is embodied in the form of a general purpose computing device. Components of electronic device 1100 may include, but are not limited to: the at least one processing unit 1110, the at least one memory unit 1120, a bus 1130 connecting the different system components (including the memory unit 1120 and the processing unit 1110), and a display unit 1140.

Wherein the storage unit stores program code that is executable by the processing unit 1110 such that the processing unit 1110 performs steps according to various exemplary embodiments of the present utility model described in the above-described "exemplary methods" section of the present specification.

The storage unit 1120 may include a readable medium in the form of a volatile storage unit, such as a Random Access Memory (RAM) 11201 and/or a cache memory 11202, and may further include a Read Only Memory (ROM) 11203.

The storage unit 1120 may also include a program/utility 11204 having a set (at least one) of program modules 11205, such program modules 11205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

The bus 1130 may be a local bus representing one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a bus using any of a variety of bus architectures.

The electronic device 1100 may also communicate with one or more external devices 1200 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 1100, and/or any devices (e.g., routers, modems, etc.) that enable the electronic device 1100 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 1150. Also, electronic device 1100 can communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 1160. As shown, network adapter 1160 communicates with other modules of electronic device 1100 via bus 1130. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 1100, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present utility model may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present utility model.

It will be appreciated that the various embodiments/implementations provided by the utility model may be combined with one another without conflict and are not illustrated here.

In the inventive embodiments, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments of the utility model will be understood by those skilled in the art according to the specific circumstances.

In the description of the embodiments of the utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the utility model and to simplify the description, and do not indicate or imply that the devices or units referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the utility model.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the utility model and is not intended to limit the embodiment of the utility model, and various modifications and variations can be made to the embodiment of the utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present utility model should be included in the protection scope of the embodiments of the present utility model.

Claims (11)

1. An oil-injected air compressor, comprising:

a compressor assembly for compressing a gas;

the oil-gas barrel is connected with the compressor assembly and is used for separating an oil-gas mixture provided by the compressor assembly; oil liquid circularly flows between the compressor component and the oil gas barrel;

The oil cooling assembly is connected with the compressor assembly and the oil gas barrel and is used for cooling the oil liquid;

the post-cooling assembly is connected with the oil-gas barrel and used for cooling the compressed gas separated from the oil-gas barrel; and

the controller is in signal connection with the compressor component, the oil-gas barrel, the oil cooling component and the post-cooling component and is used for controlling the oil cooling component to be in an energy-saving running state according to a state switching signal, and the post-cooling component is in a stop state or a lowest rotating speed running state;

the state switching signal is that the oil injection air compressor is switched from a heavy vehicle state to an empty vehicle state.

2. The oil-injected air compressor of claim 1, wherein the oil cooling assembly comprises:

the oil-cooled heat exchanger is connected with the compressor assembly and the oil-gas barrel and is used for exchanging heat with the oil liquid;

the oil cooling fan is arranged at one side of the oil cooling heat exchanger and used for discharging heat generated by the oil cooling heat exchanger;

the oil cooling motor is a variable frequency motor; the oil cooling motor is in driving connection with the oil cooling fan; the controller is in signal connection with the oil cooling motor and is used for controlling the oil cooling motor to be in a low-frequency running state according to the state switching signal.

3. The oil-injected air compressor of claim 1, wherein the aftercooling assembly includes:

the back cooling heat exchanger is connected with the oil-gas barrel and is used for exchanging heat with the compressed gas separated from the oil-gas barrel;

the rear cooling fan is arranged at one side of the rear cooling heat exchanger and used for discharging heat generated by the rear cooling heat exchanger; and

the rear cooling motor is a variable frequency motor or a fixed frequency motor; the rear cooling motor is in driving connection with the rear cooling fan; the controller is in signal connection with the post-cooling motor;

when the post-cooling motor is a fixed-frequency motor, the controller is used for controlling the post-cooling motor to be in a stop state according to the state switching signal; when the back cooling motor is a variable frequency motor, the controller is used for controlling the back cooling motor to be in a stop state or a lowest rotating speed running state according to the state switching signal.

4. A fuel injected air compressor according to any one of claims 1 to 3, wherein the post-cooling assembly is disposed above the compressor assembly.

5. A fuel injected air compressor according to any one of claims 1 to 3, further comprising:

A base; and

the outer cover is connected with the base, and the compressor component, the oil-gas barrel, the oil cooling component and the rear cooling component are arranged on the base and covered by the outer cover; the outer cover is provided with a first air inlet, a second air inlet, a first air outlet and a second air outlet, the first air inlet and the first air outlet correspond to the positions of the oil cooling assembly, and the second air inlet and the second air outlet correspond to the positions of the rear cooling assembly;

the first air inlet and the second air inlet are formed in the side wall of the outer cover, the first air outlet is formed in the top wall of the outer cover, and the second air outlet is formed in the side wall or the top wall of the outer cover.

6. The oil-injected air compressor of claim 5, wherein the oil cooling assembly includes an oil cooling fan, the oil cooling fan being a centrifugal fan and corresponding to the first air inlet and the first air outlet.

7. The oil-injected air compressor of claim 5, wherein the post-cooling assembly includes a post-cooling fan that is an axial fan and corresponds to the second air inlet and the second air outlet.

8. A fuel injected air compressor according to any one of claims 1 to 3, further comprising:

a base; and

the outer cover is connected with the base, and the compressor component, the oil-gas barrel, the oil cooling component and the rear cooling component are arranged on the base and covered by the outer cover; the outer cover comprises a first side wall and a second side wall which are oppositely arranged, the oil cooling assembly is arranged on the inner side surface of the first side wall, and the rear cooling assembly is arranged on the inner side surface of the second side wall;

the compressor assembly is arranged on the inner side surface of the second side wall; the compressor assembly is disposed opposite the oil cooling assembly along a direction of separation of the first and second sidewalls.

9. The oil-injected air compressor of claim 8, wherein the compressor assembly includes a compressor body and a main motor drivingly connected to the compressor body;

the main motor is connected with the compressor body along a first direction, the oil cooling assembly extends along a second direction, and the first direction is parallel to the second direction.

10. The oil-injected air compressor of claim 1, further comprising:

A base; and

the outer cover is connected with the base, and the compressor component, the oil-gas barrel, the oil cooling component and the rear cooling component are arranged on the base and covered by the outer cover; the outer cover comprises a first side wall, a second side wall, a third side wall, a fourth side wall and a top wall, wherein the first side wall and the second side wall are oppositely arranged, the first side wall and the second side wall are respectively connected to two opposite sides of the base, and the third side wall and the fourth side wall are respectively connected to the other two opposite sides of the base; the top wall is respectively connected with the first side wall, the second side wall, the third side wall and the fourth side wall;

wherein the oil cooling assembly and the after-cooling assembly are disposed at any two different walls of the first side wall, the second side wall, the third side wall, the fourth side wall, and the top wall.

11. A fuel injected air compressor according to any one of claims 1 to 3 wherein the oil cooling assembly is connected to the compressor assembly and the oil and gas tank by an oil cooling line which is not in communication with the after cooling assembly.