A frequency conversion cabinet with cooling components and a screw compressor unit

By installing explosion-proof cabinet air conditioners on the frequency converter cabinet body of the natural gas compressor unit, the problem of difficulty in dissipating heat at flammable and explosive sites is solved, the normal use of electrical components and the explosion-proof performance of the equipment are achieved, and the difficulty of wiring work and equipment costs are reduced.

CN222721820UActive Publication Date: 2025-04-04ZHANWANG INC
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Patent Information

Application Number
CN202421285963.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-06
Publication Date
2025-04-04
Estimated Expiration
2034-06-06

AI Technical Summary

Technical Problem

Due to the explosion-proof design of the inverter cabinet of the existing natural gas compressor unit, it is difficult to effectively dissipate heat at the flammable and explosive site, resulting in overheating and damage to the electrical components. The non-explosion-proof design makes the equipment only installed in long-distance non-explosion-proof areas, increasing the difficulty of wiring work and equipment costs.

Method used

Install the cabinet air conditioner on the inverter cabinet body. The cabinet air conditioner and the inverter cabinet body are made of explosion-proof material. They are connected to the cabinet air conditioner through the filling compartment to achieve cooling and heat dissipation of hot air in the cabinet.

Benefits of technology

Through the cooling effect of the cabinet air conditioner, the problem of overheating of the electrical components inside the frequency converter cabinet body is solved, the explosion-proof performance of the equipment is maintained, and the field wiring workload and equipment cost are reduced.

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Abstract

The utility model belongs to the technical field of compressors, and specifically relates to a frequency conversion cabinet and a screw compressor unit with a cooling component, comprising a frequency conversion cabinet body, a cabinet air conditioner is arranged on one side of the frequency conversion cabinet body, wherein the outer shells of the cabinet air conditioner and the frequency conversion cabinet body are both made of explosion-proof materials, a filling interlayer is arranged on the side of the frequency conversion cabinet body facing the cabinet air conditioner, and a hot air inlet and a cold air outlet in the cabinet which are connected to the cabinet air conditioner are opened on the filling interlayer, and a frequency converter is arranged inside the frequency conversion cabinet body, and its purpose is to solve the problem of cooling in the cabinet by installing the cabinet air conditioner on the frequency conversion cabinet body, so as to meet the normal use of electrical components; reduce the workload of on-site installation, wiring and debugging; and avoid the problems of large workload and high cost of on-site wiring due to long installation distance.
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Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and in particular relates to a frequency conversion cabinet with a cooling component and a screw compressor unit. Background Art

[0002] In natural gas extraction and processing operations, screw compressors are usually used to compress natural gas.

[0003] In the prior art, since natural gas compressor units are installed in flammable and explosive environments, all electrical components used in the equipment must meet explosion-proof requirements. To achieve this, many electrical components are installed in a closed flameproof cabinet. However, these electrical components generate varying degrees of heat during operation, making it difficult to quickly dissipate the heat in the closed cabinet, making it very easy for the electrical components to overheat and become damaged. To avoid this, the current common practice is to make the inverter cabinet body on such compressor units non-explosion-proof, using the cabinet's ventilation fan to dissipate heat from within the cabinet. This method results in the cabinet equipment being installed only in non-explosion-proof areas, which are typically tens or hundreds of meters away from the flammable and explosive location where the natural gas compressor unit is installed. Such a long distance is not conducive to on-site wiring work, which greatly increases the cost of the equipment and also increases the equipment failure rate. Utility Model Content

[0004] In view of this, the present invention provides a frequency conversion cabinet and a screw compressor unit with a cooling component, the purpose of which is to solve the problem of cooling inside the cabinet by installing a cabinet air conditioner on the frequency conversion cabinet body to meet the normal use of electrical components; reduce the workload of on-site installation, wiring and debugging; and avoid the problem of long installation distances and large on-site wiring workload.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A frequency conversion cabinet and a screw compressor unit with a cooling component include a frequency conversion cabinet body, a cabinet air conditioner is provided on one side of the frequency conversion cabinet body, wherein the outer shells of the cabinet air conditioner and the frequency conversion cabinet body are both made of explosion-proof materials, a filling interlayer is provided on the side of the frequency conversion cabinet body facing the cabinet air conditioner, and the filling interlayer is provided with a hot air inlet and a cold air outlet in the cabinet connected to the cabinet air conditioner, and a frequency converter is provided inside the frequency conversion cabinet body.

[0007] As a preferred technical solution, one side of the cabinet air conditioner is provided with an external cold air inlet, and a side of the cabinet air conditioner adjacent to the side with the external cold air inlet is provided with an external hot air outlet.

[0008] Furthermore, a compressor, a condenser and an evaporator are provided inside the cabinet air conditioner, wherein an exhaust pipe is provided between the compressor and the condenser, a capillary tube is provided between the condenser and the evaporator, and a return pipe is provided between the evaporator and the compressor.

[0009] Furthermore, the condenser is distributed in parallel with the external hot air outlet, and a condenser fan is provided on the condenser facing the external hot air outlet.

[0010] Furthermore, the evaporator is distributed in parallel with the cold air outlet in the cabinet, and an evaporator fan is provided at the opening where the cold air outlet in the cabinet is connected to the cabinet air conditioner.

[0011] Furthermore, a hot air exhaust fan is provided at the opening where the hot air inlet in the cabinet is connected to the cabinet air conditioner.

[0012] A screw compressor includes an air intake scrubber, a frequency conversion motor, an exhaust separation tank, an oil-gas separation tank, a screw compressor, an air cooler and a frequency conversion cabinet body. The air intake scrubber, the exhaust separation tank, the oil-gas separation tank and the screw compressor are all connected by pipelines, the frequency conversion motor is connected to the frequency converter in the frequency conversion cabinet body by a cable, and the air cooler and the oil-gas separation tank are connected by a conduit.

[0013] Furthermore, two mutually meshing screw rotors are provided inside the screw compressor, and the screw rotors are driven by a variable frequency motor.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0015] The problem of cooling inside the cabinet is solved by installing a cabinet air conditioner on the inverter cabinet body to meet the normal use of electrical components; reduce the workload of on-site installation, wiring and debugging; and avoid the problem of long installation distances and heavy on-site wiring workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a structural diagram of a frequency conversion cabinet with a cooling component and a screw compressor unit provided by the utility model;

[0018] Figure 2 This is a structural diagram of the frequency conversion cabinet cooling assembly provided by the utility model;

[0019] Intake scrubber tank-1; variable frequency motor-2; exhaust separation tank-3; oil-gas separation tank-4; screw compressor-5; air cooler-6; variable frequency cabinet body-7; cabinet air conditioner-8; filling compartment-9; cabinet hot air inlet-10; hot exhaust fan-11; cabinet cold air outlet-12; evaporator fan-13; compressor-14; exhaust pipe-15; condenser-16; capillary tube-17; evaporator-18; external cold air inlet-19; external hot air outlet-20; condenser fan-21. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1: In the prior art, natural gas compressor units operate in flammable and explosive environments. To ensure safe operation, all electrical components used in the equipment must meet explosion-proof standards. To this end, many electrical components are installed within a sealed explosion-proof cabinet. However, these electrical components generate heat during operation, and in a closed cabinet environment, this heat is difficult to dissipate effectively, potentially causing overheating and damage. To address this issue, a common solution is to design the inverter cabinet on the compressor unit as non-explosion-proof and equip it with a ventilation fan to promote internal heat dissipation. However, this approach means that the control cabinet can only be installed in non-explosion-proof areas. Typically, these non-explosion-proof areas are far away from the flammable and explosive environment where the natural gas compressor unit is located, potentially tens or even hundreds of meters away. This layout not only increases the difficulty of on-site wiring, but also significantly increases the cost of equipment use and the risk of equipment failure.

[0022] Therefore, in order to solve the problem that the inverter cabinet body 7 of the existing compressor unit needs to be non-explosion-proof before the heat dissipation component can be installed, so that the inverter cabinet body 7 with the heat dissipation component installed can only be installed at a location dozens or hundreds of meters away from the location of the compressor unit, which increases the difficulty of on-site wiring and increases the cost of equipment use, the inverter cabinet body 7 can achieve the function of heat dissipation and explosion-proof effect at the same time. The utility model discloses a inverter cabinet cooling component, see Figure 2, including a frequency conversion cabinet body 7 and a cabinet air conditioner 8 for providing heat dissipation for the frequency conversion cabinet body 7. Specifically, a cabinet air conditioner 8 is provided on one side of the frequency conversion cabinet body 7, wherein the cabinet air conditioner 8 and the housing of the frequency conversion cabinet body 7 are both explosion-proof designs, and a filling interlayer 9 is provided on the side of the frequency conversion cabinet body 7 facing the cabinet air conditioner 8, and a hot air inlet 10 and a cold air outlet 12 in the cabinet are opened on the filling interlayer 9 and are connected to the cabinet air conditioner 8. A frequency converter is provided inside the frequency conversion cabinet body 7;

[0023] When the electronic components in the frequency conversion cabinet body 7, such as the frequency converter, emit heat, the heat in the frequency conversion cabinet body 7 will enter the cabinet air conditioner 8 through the hot air inlet 10 in the cabinet. The cabinet air conditioner 8 can then cool the hot air and guide it back into the frequency conversion cabinet body 7 through the cold air outlet 12 in the cabinet, thereby achieving the effect of cooling the internal components of the frequency conversion cabinet body 7. Secondly, since the outer shells of the cabinet air conditioner 8 and the frequency conversion cabinet body 7 are both made of explosion-proof materials, and the air conditioning cabinet 8 and the frequency conversion cabinet body 7 are only connected through the hot air inlet 10 in the cabinet and the cold air outlet 12 in the cabinet, the connection between the frequency conversion cabinet body 7 and the cabinet air conditioner 8 is filled and thickened by the filling interlayer 9, so that the connection between the air conditioning cabinet 8 and the frequency conversion cabinet body 7 can be made more sealed and tightened, so that the frequency conversion cabinet body 7 can have a heat dissipation effect while maintaining its explosion-proof capability.

[0024] In this embodiment, the filling partition 9 is a solid structure as a whole. The filling partition 9 can completely separate the cabinet air conditioner 8 from the electronic components in the frequency conversion cabinet body 7, ensuring that only the hot air inlet 10 and the cold air outlet 12 in the cabinet can be connected to the cabinet air conditioner 8. Through this setting, the air circulation in the cabinet air conditioner 8 and the frequency conversion cabinet body 7 can be independent of each other.

[0025] In this embodiment, the cabinet air conditioner 8 is provided with an external cold air inlet 19 on one side, and an external hot air outlet 20 is provided on a side of the cabinet air conditioner 8 adjacent to the side provided with the external cold air inlet 19. Through the external cold air inlet 19 and the external hot air outlet 20, external cold air can enter the interior of the cabinet air conditioner 8 through the external cold air inlet 19 to accelerate the cooling of the condenser 16. The hot air on the condenser 16 is then discharged through the external hot air outlet 20, thereby achieving air exchange between the cabinet air conditioner 8 and the external environment, further improving the heat dissipation efficiency of the cabinet air conditioner 8. Furthermore, since the external cold air inlet 19 and the external hot air outlet 20 are both located outside the cabinet air conditioner 8, they do not affect the explosion-proof performance of the inverter cabinet body 7, ensuring overall safety. Furthermore, when the internal hot air inlet 10 introduces hot air from the inverter cabinet body 7 into the cabinet air conditioner 8, the hot air inside the cabinet mixes with the external cold air, achieving a heat exchange effect, and finally being discharged together through the external hot air outlet 20.

[0026] In this embodiment, a compressor 14, a condenser 16 and an evaporator 18 are provided inside the cabinet air conditioner 8, wherein an exhaust pipe 15 is provided between the compressor 14 and the condenser 16, a capillary tube 17 is provided between the condenser 16 and the evaporator 18, and a return pipe is provided between the evaporator 18 and the compressor 14. When the cabinet air conditioner 8 is in use, the compressor 14 can compress the refrigerant into a high-temperature and high-pressure gas, and then introduce these gases into the condenser 16 through the exhaust pipe 15 to condense them into a normal temperature and high-pressure liquid. Thereafter, the liquid is introduced into the evaporator 18 through the capillary tube 17 to evaporate into a gaseous low-temperature refrigerant, absorbing a large amount of heat to form cold air, and finally the refrigerant is reintroduced back into the compressor 14 through the return pipe to form a cycle.

[0027] In this embodiment, the condenser 16 is distributed parallel to the external hot air outlet 20, and a condenser fan 21 is provided on the condenser 16 facing the external hot air outlet 20. Through the setting of the condenser fan 21, the heat emitted by the condenser 16 can be quickly blown out of the cabinet air conditioner 8 through the external hot air outlet 20.

[0028] In this embodiment, the evaporator 18 is distributed parallel to the cold air outlet 12 in the cabinet, and an evaporator fan 13 is provided at the opening where the cold air outlet 12 in the cabinet is connected to the cabinet air conditioner 8. When the hot air entering the cabinet air conditioner 8 comes into contact with the evaporator 18, the heat will be absorbed by the evaporator 18, and then the cold air will be blown into the frequency conversion cabinet body 7 through the cold air outlet 12 in the cabinet by the evaporator fan 13.

[0029] In this embodiment, a hot air inlet 10 in the cabinet is connected to the opening of the cabinet air conditioner 8 and a hot exhaust fan 11 is provided. Through the setting of the hot exhaust fan 11, the heat in the frequency conversion cabinet body 7 can be quickly drawn into the cabinet air conditioner 8 and contact the evaporator 18. In conjunction with the cold air outlet 12 in the cabinet, an air circulation can be formed in the frequency conversion cabinet body 7 to improve the heat exchange efficiency.

[0030] In the above embodiment, the interior of the cabinet air conditioner 8 is divided into two partitions, and the evaporator 18 and the external cold air inlet 19 and the external hot air outlet 20 are not in the same partition, so that the air circulation in the two partitions does not circulate with each other. Through this arrangement, the evaporator 18 will not come into contact with the air entering from the external cold air inlet 19. The cabinet air conditioner 8 cools the air inside the frequency conversion cabinet body 7 through two completely independent and isolated air circulations inside and outside, and at the same time dissipates the heat in the frequency conversion cabinet body 7 out of the cabinet through heat exchange, thereby protecting the electrical components in the frequency conversion cabinet body 7 to operate within a controllable temperature range.

[0031] Example 2: Based on Example 1, the present invention also discloses a screw compressor. Figure 1, including an air intake washing tank 1, a frequency conversion motor 2, an exhaust separation tank 3, an oil-gas separation tank 4, a screw compressor 5, an air cooler 6 and a frequency conversion cabinet body 7. Specifically, the air intake washing tank 1, the exhaust separation tank 3, the oil-gas separation tank 4 and the screw compressor 5 are connected by pipelines, the frequency conversion motor 2 is connected to the frequency converter in the frequency conversion cabinet body 7 through a cable, and the air cooler 6 and the oil-gas separation tank 4 are connected through a conduit.

[0032] Through the above structure, the working steps of the natural gas compressor unit are as follows:

[0033] In step 1, the gas first passes through the air inlet scrubber 1 to be filtered and scrubbed to remove impurities before entering the screw compressor 5;

[0034] Step 2: The screw compressor 5 is driven by the variable frequency motor 2 and adjusts the speed according to demand to compress the gas;

[0035] Step 3: The compressed gas enters the oil-gas separation tank 4 and is separated by centrifugal force or mechanically to remove most of the lubricating oil;

[0036] Step 4: The gas enters the exhaust separation tank 3 for more detailed separation to remove the remaining oil and impurities;

[0037] Step 5: The purified compressed gas is finally delivered to where it is needed or stored in a container.

[0038] In this embodiment, the air cooler 6 can cool the gas and oil in the oil-gas separation tank 4 through a conduit.

[0039] In this embodiment, the screw compressor 5 is provided with two intermeshing screw rotors inside, and the screw rotors are driven by a variable frequency motor 2. Through the above structure, when the screw rotors start to rotate relative to each other, the gas will be trapped in the screw tooth grooves. As the rotors rotate, the gas volume decreases and the pressure increases, thereby achieving a compression effect.

[0040] In this embodiment, the variable frequency motor 2 can be controlled by the frequency converter in the frequency conversion cabinet body 7, so that the speed of the screw compressor 5 can be increased or decreased according to demand.

[0041] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0042] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A frequency conversion cabinet with a cooling assembly, comprising a frequency conversion cabinet body (7), characterized in that: A cabinet air conditioner (8) is arranged on one side of the frequency conversion cabinet body (7), wherein the housings of the cabinet air conditioner (8) and the frequency conversion cabinet body (7) are both made of explosion-proof materials, a filling interlayer (9) is arranged on the side of the frequency conversion cabinet body (7) facing the cabinet air conditioner (8), and a hot air inlet (10) and a cold air outlet (12) in the cabinet that are connected to the cabinet air conditioner (8) are opened on the filling interlayer (9), and a frequency converter is arranged inside the frequency conversion cabinet body (7).

2. A frequency conversion cabinet with a cooling assembly according to claim 1, characterized in that: An external cold air inlet (19) is provided on one side of the cabinet air conditioner (8), and an external hot air outlet (20) is provided on a side of the cabinet air conditioner (8) adjacent to the side provided with the external cold air inlet (19).

3. The frequency conversion cabinet with a cooling assembly according to claim 1, characterized in that: The cabinet air conditioner (8) is provided with a compressor (14), a condenser (16) and an evaporator (18) inside, wherein an exhaust pipe (15) is provided between the compressor (14) and the condenser (16), a capillary tube (17) is provided between the condenser (16) and the evaporator (18), and a return pipe is provided between the evaporator (18) and the compressor (14).

4. The frequency conversion cabinet with a cooling assembly according to claim 3, characterized in that: The condenser (16) is distributed in parallel with the external hot air outlet (20), and a condenser fan (21) facing the external hot air outlet (20) is provided on the condenser (16).

5. The frequency conversion cabinet with a cooling assembly according to claim 3, characterized in that: The evaporator (18) is arranged in parallel with the cold air outlet (12) in the cabinet, and an evaporator fan (13) is provided at the opening where the cold air outlet (12) in the cabinet is connected to the cabinet air conditioner (8).

6. The frequency conversion cabinet with a cooling assembly according to claim 1, characterized in that: A heat exhaust fan (11) is provided at the opening of the hot air inlet (10) in the cabinet that is connected to the cabinet air conditioner (8).

7. A screw compressor unit, comprising an air intake scrubber (1), a variable frequency motor (2), an exhaust separation tank (3), an oil-gas separation tank (4), a screw compressor (5) and an air cooler (6), characterized in that: It also includes a frequency conversion cabinet body (7) as described in any one of claims 1 to 6, wherein the air intake washing tank (1), the exhaust separation tank (3), the oil and gas separation tank (4) and the screw compressor (5) are all connected through pipelines, the frequency conversion motor (2) and the frequency converter in the frequency conversion cabinet body (7) are connected through a cable, and the air cooler (6) and the oil and gas separation tank (4) are connected through a conduit.

8. A screw compressor unit according to claim 7, characterized in that: The screw compressor (5) is provided with two mutually meshing screw rotors inside, and the screw rotors are driven by a variable frequency motor (2).