Vacuum pump with heat recovery function

Abstract

The utility model relates to the field of vacuum pumps, in particular to a vacuum pump with a heat recovery function, which comprises a case, a pump body and a driving motor, the pump body is mounted in the case, an inner cavity is formed in the pump body, the driving motor is connected with one end of the pump body, the side surface of the case is connected with a controller, and the pump body is connected with a heat exchanger. A heat exchange channel is formed in the heat exchanger, an air inlet and a refrigerant inlet are formed in one end of the heat exchanger, the refrigerant inlet is connected with a refrigerant storage device through a refrigerant pipeline, an air outlet and a heating medium outlet are formed in the other end of the heat exchanger, and the refrigerant storage device communicates with the heating medium outlet through a circulation driving part. Compressed air generated by operation of the pump body enters the heat exchanger for heat transfer and exchange, a refrigerant medium enters the heat exchange channel to absorb heat in the heat exchange channel, and the refrigerant medium is driven by the circulation driving part to be discharged from the heating medium outlet, so that heat energy is recycled, energy utilization efficiency is improved, and energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the field of vacuum pumps, in particular to a vacuum pump with heat recovery. Background Art

[0002] With the continuous development of science and technology, vacuum pumps are increasingly used in various industries, especially in areas that require high vacuum, high efficiency and stable operation. Oil-cooled oil-free screw vacuum pumps, as one of them, have the characteristics of simple structure, high pumping efficiency, high vacuum and stable operation. They are widely used in the electronics industry, medical, chemical industry and other fields.

[0003] The oil-cooled oil-free screw vacuum pump is a vacuum pump that adopts the screw working principle and extracts and compresses gas through the rotation of the screw. Its core part is mainly composed of a pair of intermeshing screws. The screw rotates in the pump body, sucking gas from the air inlet, and compressing and discharging it through the gap between the inner screw of the pump cavity to achieve the function of vacuuming. At the same time, the pump body is cooled by the oil cooling system to ensure the stable operation of the vacuum pump, and the compressed air is silenced and noise-reduced by using a muffler. It is widely used in domestic pharmaceutical, chemical, semiconductor and other enterprise fields with high requirements for clean vacuum.

[0004] However, during the operation of the vacuum pump, a large amount of heat is generated when the air is compressed, thereby forming compressed hot vacuum gas. However, existing vacuum pumps usually use silencers to reduce the noise of these gases, and the hot vacuum gas after noise reduction still carries a large amount of heat. Existing vacuum pumps generally discharge this heat directly, causing the air containing heat to be directly dissipated into the environment in the form of heat energy, resulting in energy waste. The direct discharge of hot vacuum gas causes a local temperature increase in the environment, thereby affecting the user's use environment. Utility Model Content

[0005] The purpose of the utility model is to solve the above defects and provide a vacuum pump with heat recovery to solve the technical problem that when the vacuum pump in the above background technology is running, the heat generated in the compression process of the air is not easy to be recovered and utilized, resulting in the direct dissipation of heat energy into the environment, causing energy waste.

[0006] The purpose of the utility model is achieved by the following methods:

[0007] A vacuum pump with heat recovery includes a chassis, a pump body and a drive motor. The pump body is installed in the chassis. An inner cavity is formed inside the pump body. The drive motor is connected to one end of the pump body. A controller is connected to the side of the chassis. A heat exchanger is connected to the pump body. A heat exchange channel is formed inside the heat exchanger. An air inlet and a refrigerant inlet are provided at one end of the heat exchanger. Both the air inlet and the refrigerant inlet are connected to the heat exchange channel. The air inlet is connected to the inner cavity of the pump body. The refrigerant inlet is connected to a refrigerant storage device through a refrigerant pipeline. An air outlet and a heat medium outlet are provided at the other end of the heat exchanger. Both the air outlet and the heat medium outlet are connected to the heat exchange channel. The refrigerant storage device is connected to the heat medium outlet through a circulation drive component.

[0008] In the above description, the heat exchange channel is further connected with a heat exchange rod, which extends from the air inlet of the muffler body to the air outlet of the muffler body, and the heat exchange rod is formed with evenly distributed fins by extrusion. The heat exchange rod is easy to install and can be directly inserted into the heat exchange channel, and the evenly distributed fins formed by aluminum extrusion make the heat contact area of ​​the heat exchange rod larger, so that the heat contact effect with the compressed air is better, and the heat on the compressed air is conveniently attached to the heat exchange rod, so that the introduced cold medium (cooling water or coolant or cooling oil) absorbs the heat on the heat exchange rod through the heat exchange channel and is exported from the heat medium outlet, so as to reasonably recycle the heat, save the waste of thermal energy resources, and make the hot gas form cold gas from the outlet to enter the next process.

[0009] Further in the above description, one end of the heat exchanger is directly connected to the inner cavity of the pump body, and the other end of the heat exchanger extends to the outer side of the chassis and is exposed outside the chassis, and the end of the heat exchanger extending outside the chassis is connected to a muffler through a connecting pipe, the heat exchanger and the connecting pipe are all connected to the muffler, a muffler channel is formed inside the muffler, and the muffler is provided with an exhaust port connected to the muffler channel.

[0010] The heat exchanger is directly connected to the pump body, so that the compressed air generated by the vacuum of the pump body can be quickly introduced into the heat exchange channel of the heat exchanger to quickly recover heat, reduce heat loss and the impact of reflux on the internal components of the pump body, and prevent the internal temperature of the pump body from rising;

[0011] The cold gas formed after heat recovery enters the muffler, and is silenced and noise-reduced through the muffler channel, further reducing noise emissions, which is conducive to the discharge of the cold gas through the exhaust port.

[0012] Further in the above description, the interior of the muffler away from the exhaust port is connected with a partition, and the interior of the muffler close to the exhaust port is connected with a mounting plate, the mounting plate and the exhaust port form an exhaust end, a through hole connected to the muffler channel is provided on the partition, an inner muffler pipe is connected between the partition and the mounting plate, and slots connected to the inner muffler pipe are provided on the partition and the mounting plate, and the exhaust end is connected to the muffler channel through the inner muffler. When the cold gas enters the muffler channel, a guide noise reduction is formed inside it, so that the cold gas passes through the through hole on the partition and the slot on the partition into the inner muffler, and further reduces noise and silences through the noise reduction material (sound-absorbing cotton or foam plastic, etc.) on the inner muffler, thereby enhancing the muffler effect and reducing noise emissions.

[0013] In the above description, the heat exchanger is connected to the pump body through a silencer pipe, one end of the silencer pipe is connected to the inner cavity of the pump body, and the other end of the silencer pipe extends to one side of the chassis to be exposed on the outer side of the chassis and is connected to the heat exchanger, and the heat exchanger is exposed outside the chassis. Through the connection of the silencer pipe with the heat exchanger and the pump body, the compressed air generated by the vacuum of the pump body is pre-noised and silenced, reducing the transmission of noise, making it convenient to exchange heat through the heat exchanger after noise reduction.

[0014] Further in the above description, the refrigerant storage device is composed of a storage tank or a water tank, and a refrigerant containing chamber is provided inside the refrigerant storage device. One end of the refrigerant pipe is connected to the refrigerant containing chamber, and the other end of the refrigerant pipe is connected to the refrigerant inlet on the heat exchanger.

[0015] In the above description, the circulation drive is provided with a circulation pipe, one end of the circulation pipe is connected to the circulation drive, and the other end of the circulation pipe is connected to the heat medium outlet on the heat exchanger. The circulation drive is composed of a water pump, which extracts the heat medium after heat exchange in the heat exchange channel through the connection between the circulation pipe and the heat medium outlet for circulation.

[0016] Further in the above description, the pump body is installed in the chassis through a support frame, and an air inlet port and an air outlet port connected to the inner cavity of the pump body are respectively opened at both ends of the pump body.

[0017] The beneficial effects of the utility model are as follows: the air inlet of the heat exchanger is connected to the pump body, so that its heat exchange channel is connected to the inner cavity, and the refrigerant inlet and the heat medium outlet are both connected to the refrigerant storage device. During the operation of the vacuum pump, the compressed air generated by the vacuum operation of the pump body contains a large amount of heat, so that the compressed air enters the heat exchange channel of the heat exchanger for heat transfer and exchange, and the refrigerant medium in the refrigerant storage device enters the heat exchange channel through the refrigerant pipe through the refrigerant inlet to absorb the heat inside, thereby making the refrigerant medium form a heat medium, and is driven by the circulation drive member to be discharged from the heat medium outlet, realizing the heat exchange recovery function between the heat of the compressed air and the refrigerant, so that its heat can be reasonably converted and recycled, reducing the waste of thermal energy resources, and reducing the heat loss and thermal pollution to the environment when the compressed air after cooling is discharged, thereby realizing the recovery and reuse of thermal energy, improving energy utilization efficiency, and reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of the heat exchanger in this embodiment;

[0019] Figure 2 This is a schematic diagram of the overall structure of the first embodiment;

[0020] Figure 3 Schematic diagram of the connection structure of the heat exchanger in the first embodiment;

[0021] Figure 4 Schematic diagram of the internal structure of the first embodiment;

[0022] Figure 5 This is a schematic diagram of the connection structure between a heat exchanger and a muffler in this embodiment;

[0023] Figure 6 This is a schematic diagram of the overall structure of the second embodiment;

[0024] Figure 7 This is a schematic diagram of the connection structure of the heat exchanger in the second embodiment;

[0025] Figure 8 This is a schematic diagram of the internal structure of the second embodiment;

[0026] The reference numerals in the figure are: 1-chassis, 2-pump body, 3-drive motor, 4-controller, 5-heat exchanger, 6-heat exchange channel, 7-air inlet, 8-refrigerant inlet, 9-refrigerant pipeline, 10-refrigerant storage device, 11-air outlet, 12-heat medium outlet, 13-circulation drive member, 14-heat exchange rod, 15-connecting pipeline, 16-muffler, 17-muffler channel, 18-exhaust port, 19-partition, 20-mounting plate, 21-exhaust end, 22-through hole, 23-inner muffler pipe, 24-slot hole, 25-circulation pipeline, 26-support frame, 27-air inlet port, 28-air outlet port, 29-muffler pipeline. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Embodiment 1

[0029] In this embodiment, refer to Figure 1-Figure 5 The vacuum pump with heat recovery specifically implemented includes a chassis 1, a pump body 2 and a driving motor 3. The pump body 2 is installed in the chassis 1. An inner cavity is formed inside the pump body 2. The driving motor 3 is connected to one end of the pump body 2. A controller 4 is connected to the side of the chassis 1. A heat exchanger 5 is connected to the pump body 2. A heat exchange channel 6 is formed inside the heat exchanger 5. An air inlet 7 and a refrigerant inlet 8 are provided at one end of the heat exchanger 5. The air inlet 7 and the refrigerant inlet 8 are both connected to the heat exchange channel 6. The air inlet 7 is connected to the inner cavity of the pump body 2. The refrigerant inlet 8 is connected to a refrigerant storage device 10 through a refrigerant pipeline 9. An air outlet 11 and a heat medium outlet 12 are provided at the other end of the heat exchanger 5. The air outlet 11 and the heat medium outlet 12 are both connected to the heat exchange channel 6. The refrigerant storage device 10 is connected to the heat medium outlet 12 through a circulation drive member 13.

[0030] The heat exchange channel 6 is connected to a heat exchange rod 14, which extends from the air inlet 7 of the muffler body to the air outlet 11 of the muffler body, and the heat exchange rod 14 is formed with evenly distributed fins by extrusion. The heat exchange rod 14 is easy to install and can be directly inserted into the heat exchange channel 6. The evenly distributed fins formed by aluminum extrusion make the heat contact area of ​​the heat exchange rod 14 larger, so that the heat contact effect with the compressed air is better, and the heat on the compressed air is conveniently attached to the heat exchange rod 14, so that the introduced cold medium (cooling water or coolant or cooling oil) absorbs the heat on the heat exchange rod 14 through the heat exchange channel 6, and is exported from the heat medium outlet 12, so as to reasonably recycle the heat, save the waste of thermal energy resources, and make the hot gas (high-temperature steam or high-temperature compressed air) form cold gas and enter the next process from the air outlet 11.

[0031] Reference Figure 5One end of the heat exchanger 5 is directly connected to the inner cavity of the pump body 2, and the other end of the heat exchanger 5 extends to the outer side of the chassis 1 and is exposed outside the chassis 1, and the end of the heat exchanger 5 extending outside the chassis 1 is connected to the muffler 16 through the connecting pipe 15, the heat exchanger 5 and the connecting pipe 15 are all connected to the muffler 16, a muffler channel 17 is formed inside the muffler 16, and the muffler 16 is provided with an exhaust port 18 connected to the muffler channel 17.

[0032] The heat exchanger 5 is directly connected to the pump body 2, so that the compressed air generated by the vacuum of the pump body 2 is quickly introduced into the heat exchange channel 6 of the heat exchanger 5, so as to quickly recover the heat, reduce the influence of heat loss and reflux on the internal components of the pump body 2, and prevent the temperature inside the pump body 2 from rising;

[0033] The cold gas formed after the heat is recovered enters the muffler 16 , and is silenced and noise-reduced by the muffler channel 17 , thereby further reducing noise emission, thereby facilitating the cold gas to be discharged through the exhaust port 18 .

[0034] Reference Figure 5 A partition plate 19 is connected to the interior of the muffler 16 away from the exhaust port 18, and a mounting plate 20 is connected to the interior of the muffler 16 close to the exhaust port 18. The mounting plate 20 and the exhaust port 18 form an exhaust end 21. A through hole 22 connected to the muffler channel 17 is opened on the partition plate 19. An inner muffler pipe 23 is connected between the partition plate 19 and the mounting plate 20, and slots 24 connected to the inner muffler pipe 23 are opened on the partition plate 19 and the mounting plate 20. The exhaust end 21 is connected to the muffler channel 17 through the inner muffler 16.

[0035] When the cold gas enters the silencer channel 17, a guide noise reduction is formed inside the channel, so that the cold gas passes through the through hole 22 on the partition 19 and enters the inner silencer 16 from the slot 24 on the partition 19, and further reduces noise and silences the sound through the noise reduction material (sound-absorbing cotton or foam plastic, etc.) on the inner silencer 16, thereby enhancing the silencer effect of the silencer 16 and reducing noise emissions.

[0036] The refrigerant storage device 10 is composed of a storage tank or a water tank. A refrigerant containing chamber is provided inside the refrigerant storage device 10. One end of the refrigerant pipe 9 is connected to the refrigerant containing chamber, and the other end of the refrigerant pipe 9 is connected to the refrigerant inlet 8 on the heat exchanger 5.

[0037] The circulation drive member 13 is provided with a circulation pipe 25, one end of which is in communication with the circulation drive member 13, and the other end of which is in communication with the heat medium outlet 12 on the heat exchanger 5. The circulation drive member 13 is composed of a water pump, which extracts the heat medium after heat exchange in the heat exchange channel 6 through the connection between the circulation pipe 25 and the heat medium outlet 12 for circulation.

[0038] The pump body 2 is installed in the chassis 1 through a support frame 26 , and an air inlet port 27 and an air outlet port 28 communicating with the inner cavity of the pump body 2 are respectively provided at two ends of the pump body 2 .

[0039] In this embodiment, noise reduction materials (sound-absorbing cotton or foam plastic, etc.) are provided inside the silencer pipe 29 and the inner silencer pipe 23 to further reduce noise and silence the sound, enhance the silencer effect, and reduce noise emissions.

[0040] The specific heat exchange use process in this embodiment is: the air inlet 7 of the heat exchanger 5 is directly connected to the air outlet port 28 of the pump body 2 through the installation pipeline, so that the heat exchange channel 6 is connected to the inner cavity, the heat exchanger 5 is built in the chassis 1, and the refrigerant inlet 8 and the heat medium outlet 12 are both connected to the refrigerant storage device 10. During the operation of the vacuum pump, the compressed air generated by the vacuum operation of the pump body 2 contains a large amount of heat, so that the compressed air enters the heat exchange channel 6 of the heat exchanger 5 and transfers and exchanges heat with the heat exchange rod 14, so that the refrigerant in the refrigerant storage device 10 enters the heat exchange channel 6 through the refrigerant pipe 9 through the refrigerant inlet 8 to absorb the heat on the heat exchange rod 14. amount, thereby making the refrigerant medium become a hot medium, and is driven by the circulation drive part 13 to be discharged from the hot medium outlet 12, and can be recovered to the refrigerant storage device 10 or the corresponding use device, thereby realizing the heat exchange recovery function between the heat of the compressed air and the refrigerant, so that its heat can be reasonably converted and recycled, reducing the waste of thermal energy resources, and allowing the cooled compressed air to pass through the connecting pipe 15 into the muffler 16, and the internal muffler pipe 23 in the muffler 16 silences and reduces the noise of the compressed air, and discharges it from the exhaust port 18, reducing heat loss and thermal pollution to the environment, making the heat recovery process more stable and reliable, and improving the long-term operation stability and performance of the vacuum pump.

[0041] Embodiment 2

[0042] In this embodiment, refer to Figure 6-Figure 8 The difference between the second embodiment and the first embodiment is that the heat exchanger 5 is connected to the air outlet port 28 of the pump body 2 through the silencer pipe 29, the silencer pipe 29 is communicated with the inner cavity of the pump body 2, the other end of the silencer pipe 29 extends to one side of the chassis 1 and is exposed on the outer side of the chassis 1, and is communicated with the heat exchanger 5, the heat exchanger 5 is exposed outside the chassis 1, and the silencer pipe 29 is connected to the heat exchanger 5 and the pump body 2, so that the compressed air generated by the vacuum of the pump body 2 is pre-noised and silenced, so that it is convenient to perform subsequent heat exchange after noise reduction through the heat exchanger 5, and the air outlet 11 on the external heat exchanger 5 can be connected to a secondary silencer pipe (not shown) and discharged after another silencer treatment to reduce the transmission of noise.

[0043] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A vacuum pump with heat recovery comprises a chassis, a pump body and a driving motor. The pump body is installed in the chassis, an inner cavity is formed inside the pump body, the driving motor is connected to one end of the pump body, and a controller is connected to the side of the chassis, characterized in that: The pump body is connected to a heat exchanger, and a heat exchange channel is formed inside the heat exchanger. An air inlet and a refrigerant inlet are provided at one end of the heat exchanger, and both the air inlet and the refrigerant inlet are communicated with the heat exchange channel. The air inlet is communicated with the inner cavity of the pump body, and the refrigerant inlet is connected to a refrigerant storage device through a refrigerant pipeline. An air outlet and a heat medium outlet are provided at the other end of the heat exchanger, and both the air outlet and the heat medium outlet are communicated with the heat exchange channel. The refrigerant storage device is communicated with the heat medium outlet through a circulation drive component.

2. The vacuum pump with heat recovery according to claim 1, characterized in that: The interior of the heat exchange channel is connected with a heat exchange rod, which extends from the air inlet of the silencer pipe body to the air outlet of the silencer pipe body, and evenly distributed fins are formed on the heat exchange rod by extrusion.

3. The vacuum pump with heat recovery according to claim 2, characterized in that: One end of the heat exchanger is directly connected to the inner cavity of the pump body, and the other end of the heat exchanger extends to the outer side of the chassis and is exposed outside the chassis. The end of the heat exchanger extending outside the chassis is connected to a muffler through a connecting pipe. The heat exchanger and the connecting pipe are all connected to the muffler. A muffler channel is formed inside the muffler, and the muffler is provided with an exhaust port connected to the muffler channel.

4. The vacuum pump with heat recovery according to claim 3, characterized in that: The interior of the muffler away from the exhaust port is connected to a partition, and the interior of the muffler close to the exhaust port is connected to a mounting plate, the mounting plate and the exhaust port form an exhaust end, a through hole connected to the muffler channel is opened on the partition, an inner muffler pipe is connected between the partition and the mounting plate, and slots connected to the inner muffler pipe are opened on the partition and the mounting plate, and the exhaust end is connected to the muffler channel through the inner muffler.

5. The vacuum pump with heat recovery according to claim 2, characterized in that: The heat exchanger is connected to the pump body through a silencer pipe, one end of the silencer pipe is connected to the inner cavity of the pump body, and the other end of the silencer pipe extends to one side of the chassis and is exposed on the outer side of the chassis and is connected to the heat exchanger. The heat exchanger is exposed outside the chassis.

6. The vacuum pump with heat recovery according to any one of claims 1 to 5, characterized in that: The refrigerant storage device is composed of a storage tank or a water tank. A refrigerant containing chamber is provided inside the refrigerant storage device. One end of the refrigerant pipe is connected to the refrigerant containing chamber, and the other end of the refrigerant pipe is connected to the refrigerant inlet on the heat exchanger.

7. The vacuum pump with heat recovery according to any one of claims 1 to 5, characterized in that: The circulation drive member is provided with a circulation pipeline, one end of the circulation pipeline is communicated with the circulation drive member, and the other end of the circulation pipeline is conductively connected with the heat medium outlet on the heat exchanger.

8. The vacuum pump with heat recovery according to any one of claims 1 to 5, characterized in that: The pump body is installed in the chassis through a support frame, and an air inlet port and an air outlet port communicating with the inner cavity of the pump body are respectively opened at two ends of the pump body.

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