CN217545858U

CN217545858U - Variable frequency power unit

Info

Publication number: CN217545858U
Application number: CN202221669784.3U
Authority: CN
Inventors: 郑友斌; 杨清; 罗军
Original assignee: Hope Senlan Science & Technology Corp ltd
Current assignee: Hope Senlan Science & Technology Corp ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-10-04
Anticipated expiration: 2032-07-01

Abstract

The utility model provides a frequency conversion power unit belongs to the converter field of making, including quick-witted case, radiator unit, circuit module and controlling means. The case is a metal plate shell formed by enclosing, the inside of the case is hollow, the front side of the case is provided with an opening, a partition plate is arranged to divide the inside of the case into an upper accommodating cavity and a lower accommodating cavity, and the partition plate is provided with an opening so that the surface of the radiator is exposed out of the partition plate and used for mounting a circuit assembly; the heat dissipation assembly is arranged below the case and is positioned in the lower accommodating cavity; the circuit component is positioned in the upper accommodating cavity; the control device is arranged above the circuit component and is positioned in the upper accommodating cavity, and the circuit component is electrically connected with the control device through a cable. The utility model discloses be applied to among the cooling water set, according to the pressure frequency ratio of the load factor regulation converter output of motor, improve the efficiency of motor and system, reduce energy consumption, noise and the vibrations of motor, make its realization to the regulation of the constant temperature and constant pressure cooling capacity of cooling water set compressor arrangement.

Description

Variable frequency power unit

Technical Field

The utility model relates to a frequency conversion power unit belongs to the converter field of making.

Background

The water chilling unit is commonly called a refrigerating machine, a cooling machine and the like and comprises 4 main components: the compressor, evaporator, condenser and expansion valve are cooling water equipment capable of providing constant temperature, constant flow and constant pressure, and are widely used in various industries. The chiller is classified into a screw chiller, a scroll chiller, and a centrifugal chiller according to the type of a compressor, wherein the screw chiller is mainly applied to a central air conditioning system or large industrial refrigeration. The working principle is as follows: the refrigerant absorbs the heat of the cooled object in the evaporator and is vaporized into steam, the compressor continuously extracts the generated steam from the evaporator and carries out adiabatic compression, the compressed high-temperature and high-pressure steam is sent to the condenser and then releases heat to the refrigerant to be condensed into high-pressure liquid, the high-pressure liquid enters the evaporator after being expanded to low pressure by the throttle valve and is vaporized again to absorb the heat of the cooled object, and the cycle is repeated.

When the compressor is used, if the exhaust pressure is too high for a long time, the running current of the compressor is too high, and the motor is easy to burn; the suction pressure is low, the return air quantity is small, the refrigerating capacity is insufficient, the waste of electric energy is caused, the heat dissipation of a compressor motor cooled by the return air is poor, and the motor is easy to damage. When the expansion valve has a low-valve-temperature fault, the compressor is stopped, so that the water chilling unit stops running.

The frequency converter is an electric energy control device which applies a frequency conversion technology and a microelectronic technology and controls a motor by changing the working voltage frequency mode of the motor, has good regulation performance and is widely applied. When the frequency converter is applied to a water chilling unit, the frequency ratio output by the frequency converter is adjusted according to the load rate of the motor, the efficiency of the motor and a system is improved, the energy consumption, noise and vibration of the motor are reduced, and the constant-temperature constant-pressure cooling capacity of a compressor device of the water chilling unit is adjusted. The frequency conversion power unit is used as a core component in the frequency converter, and directly influences the performance of the whole set of frequency converter equipment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a frequency conversion power unit can improve the efficiency of motor and system, reduces energy consumption, noise and the vibrations of motor, makes its realization to the regulation of the constant temperature and pressure cooling capacity of cooling water set compressor arrangement.

The utility model provides a technical scheme is:

a variable frequency power unit comprises a case, a heat dissipation assembly, a circuit assembly and a control device, wherein the case is a metal plate shell formed by enclosure, the inside of the case is hollow, the front side of the case is open, a partition plate is arranged to divide the inside of the case into an upper accommodating cavity and a lower accommodating cavity, and a plurality of openings are formed in the partition plate so that the surface of a radiator is exposed out of the partition plate and used for mounting the circuit assembly; the heat dissipation assembly comprises a radiator, a fan mounting plate and at least one heat dissipation fan, and is arranged below the case and positioned in the lower accommodating cavity; the circuit assembly is a core component, is arranged in the case and is distributed at the positions of the upper accommodating cavity and the lower accommodating cavity; the control device is arranged above the circuit component and is positioned in the upper accommodating cavity, and the circuit component is electrically connected with the control device through a cable.

Furthermore, the case also comprises an upper cover plate, a lower cover plate, a first mounting plate and a plurality of brackets; the brackets are arranged on the inner walls of the two sides of the case; the first mounting plate is positioned in the middle of the upper accommodating cavity and is fixedly connected to the bracket, and a plurality of wire passing holes are formed in the first mounting plate; the upper cover plate and the lower cover plate are positioned at the top of the case and are covered and fixedly connected with the opening of the case to seal the upper accommodating cavity, and the upper cover plate and the lower cover plate are both provided with holes.

Furthermore, both ends of the case are respectively provided with an air inlet and an air outlet, and are both positioned in the lower accommodating cavity.

Further, the fan mounting plate is arranged at the air inlet, the cooling fan is mounted on the fan mounting plate, and the radiator is located in the middle of the lower accommodating cavity and is connected and fixed to the back of the partition plate to close the lower accommodating cavity.

Furthermore, the circuit assembly comprises a circuit module, a capacitor assembly and a flat cable, wherein the flat cable is positioned in the upper accommodating cavity, arranged on the circuit module and the capacitor assembly, and electrically connected with the circuit module and the capacitor assembly.

Furthermore, the case also comprises a second mounting plate which is positioned at one side of the bottom of the upper accommodating cavity, fixed on the partition plate and the inner wall of the case and provided with a plurality of through holes; the capacitor assembly comprises a capacitor cover, a capacitor support and at least one electrolytic capacitor, the capacitor cover is positioned in the upper accommodating cavity and fixed on the second mounting plate, the capacitor support is positioned in the lower accommodating cavity and abutted against the bottom of the case, the electrolytic capacitor penetrates through a through hole of the second mounting plate and positioned in the upper accommodating cavity and the lower accommodating cavity, the top of the electrolytic capacitor is sleeved in the capacitor cover and abutted against the capacitor cover, and the bottom of the electrolytic capacitor support is arranged in the capacitor support and abutted against the capacitor support.

Further, the circuit module comprises a rectifying module and an inverter module, the rectifying module is arranged on the radiator side by side, the bottom surface of the rectifying module is attached to the surface of the radiator, the inverter module is evenly arranged on the radiator, the bottom surface of the inverter module is attached to the surface of the radiator, and heat-conducting silicone grease is coated between the rectifying module and the radiator, and between the inverter module and the radiator.

Furthermore, the control device comprises a main control board, a drive board and a power board, the main control board, the drive board and the power board are fixedly installed on the first installation board, and the main control board, the drive board and the power board are electrically connected through cables.

Further, still include third mounting panel, contactor mounting panel, lacing bar and at least one contactor, the third mounting panel is located and holds the intracavity and fix on support and first mounting panel for the installation control device, the contactor mounting panel is located and holds the intracavity, and its installation face is laminated mutually with quick-witted case tip internal face and is fixed, the contactor installation is fixed on the contactor mounting panel, links to each other with circuit module electrical property, the lacing bar is located quick-witted case outside both sides, and connect to fix on quick-witted case.

Further, still include fourth mounting panel, at least one terminal and at least one input/output port, the fourth mounting panel is located the air outlet top, and connect to fix on the baffle, the terminal connection is fixed on the fourth mounting panel.

Compared with the prior art, the beneficial effects of the utility model are that: the pressure-frequency ratio output by the frequency converter is adjusted according to the load factor of the motor, the efficiency of the motor and a system is improved, the energy consumption, noise and vibration of the motor are reduced, and the constant-temperature and constant-pressure cooling capacity of a compressor device of a water chilling unit is adjusted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of the present invention;

fig. 2 is a schematic perspective view of the structure of the case of the present invention;

fig. 3 is a perspective view of the internal structure of the present invention;

fig. 4 is a schematic layout diagram of the circuit module and the capacitor assembly of the present invention;

fig. 5 is a schematic view of the installation of the capacitor module according to the present invention.

Reference numerals and corresponding part names: A. a chassis; B. a heat dissipating component; C. a circuit component; D. a control device; E. an upper receiving cavity; F. a lower receiving chamber; G. a circuit module; H. a capacitive component; I. arranging wires; a1, a partition board; b2, a radiator; b3, installing a fan; b4, a cooling fan; a5, an upper cover plate; a6, a lower cover plate; a7, a first mounting plate; a8, a bracket; a9, an air inlet; a10, an air outlet; a11, a second mounting plate; h12, a capacitor cover; h13, a capacitor support; h14, electrolytic capacitor; g15, a rectifying module; g16, an inversion module; d17, a main control board; d18, a driving plate; d19, a power panel; a20, a third mounting plate; a21, mounting a contactor; a22, hanging strips; c23, a contactor; a24, a fourth mounting plate; a25, a terminal; a26, input and output ports.

Detailed Description

The invention will be described in further detail with reference to the drawings and the following detailed description so that those skilled in the art can understand the invention, but it should be understood that the invention is not limited to the scope of the detailed description, and that all the inventions using the concepts of the present invention are obvious to those skilled in the art as long as they can be changed within the spirit and scope of the invention as defined and confirmed by the appended claims.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

Referring to fig. 1 to 5, the present invention shows the structure of the variable frequency power unit at different angles. As shown in fig. 1 to 5, the variable frequency power unit includes a case a, a heat dissipation assembly B, a circuit assembly C, and a control device D, where the case a is a metal plate shell formed by enclosure, the inside of the case a is hollow and has an opening on the front side, a partition plate A1 is provided to divide the inside of the case a into an upper accommodation cavity E and a lower accommodation cavity F, and the partition plate A1 is provided with a plurality of openings so that the surface of a heat sink B2 is exposed to the partition plate A1 for mounting the circuit assembly C; the heat dissipation assembly B comprises a radiator B2, a fan mounting plate B3 and at least one heat dissipation fan B4, and is arranged below the case A and positioned in the lower accommodating cavity F; the circuit assembly C is a core component, is arranged in the case A and is distributed at the positions of the upper accommodating cavity E and the lower accommodating cavity F; the control device D is arranged above the circuit component C and positioned in the upper accommodating cavity E, and the circuit component C is electrically connected with the control device D through a cable and used for controlling the variable-frequency power unit.

In a further embodiment, the case a is provided with an upper cover plate A5, a lower cover plate A6, a first mounting plate A7 and a plurality of brackets A8. The bracket A8 is arranged on the inner walls of two sides of the case A; the first mounting plate A7 is positioned in the middle of the upper accommodating cavity E and is fixedly connected to the bracket A8, and a plurality of wire passing holes are formed in the first mounting plate A7; the upper cover plate A5 and the lower cover plate A6 are located on the top of the case A and are covered with the opening of the case A and fixedly connected with the opening of the case A to seal the upper accommodating cavity E, and holes are formed in the upper cover plate A5 and the lower cover plate A6.

The upper cover plate A5 is provided with an opening for installing a control box, and the lower cover plate A6 is provided with an indicator light display hole.

In a further embodiment, the two end portions of the chassis a are respectively provided with an air inlet A9 and an air outlet a10, and are both located in the lower accommodating cavity F. The upper end part is provided with an air outlet A10, and the lower end part is provided with an air inlet A9, so that a channel is provided for heat dissipation of the variable frequency power unit.

In a further embodiment, a fan mounting plate B3 in the heat dissipation assembly B is arranged at the air inlet A9, a heat dissipation fan B4 is mounted on the fan mounting plate B3, and a heat sink B2, which is an important heat dissipation part of the variable frequency power unit, is located in the middle of the lower accommodating cavity F and is connected and fixed to the back of the partition plate A1 to seal the lower accommodating cavity F for guiding out heat of the core component.

The heat radiation component B, the air inlet A9 and the air outlet A10 jointly form a heat radiation air channel of the variable frequency power unit, external air flow is led into the heat radiation air channel from the air inlet A9 by the heat radiation fan B4, the heat inside the variable frequency power unit is taken away by the heat radiator B2, and the heat radiation requirement is met by leading out the heat through the air outlet A10.

In a further embodiment, the circuit assembly C includes a circuit module G, a capacitor assembly H, and a flat cable I, the flat cable I is located in the upper accommodating cavity E, disposed above the circuit module G and the capacitor assembly H, and electrically connected to the circuit module G and the capacitor assembly H.

Wherein, for avoiding appearing chaotic cable and arranging, circuit module G and capacitor assembly H pass through winding displacement I electric connection, and winding displacement I arranges according to certain law, directly links together rectifier module G15 and contravariant module G16 in the circuit module G with capacitor assembly H, and winding displacement I sets up to the copper bar.

In a further embodiment, the case a is further provided with a second mounting plate a11, the second mounting plate a11 is positioned at one side of the bottom of the upper accommodating cavity E and fixed on the partition plate A1 and the inner wall of the case a, and a plurality of through holes are formed in the second mounting plate a 11; the capacitor assembly H comprises a capacitor cover H12, a capacitor support H13 and at least one electrolytic capacitor H14, the capacitor cover H12 is positioned in an upper accommodating cavity E and is fixedly connected to a second mounting plate A11, the capacitor support H13 is positioned in a lower accommodating cavity F and is abutted to the bottom of the case A, the electrolytic capacitor H14 penetrates through a through hole of the second mounting plate A11 and is positioned in the upper accommodating cavity E and the lower accommodating cavity F, the top of the electrolytic capacitor support H14 is sleeved into the capacitor cover H12 and is abutted to the capacitor cover, and the bottom of the electrolytic capacitor support H13 is arranged into the capacitor support H13 and is abutted to the capacitor support.

The number of the electrolytic capacitors H14 can be changed correspondingly according to the specification change of the variable-frequency power unit. Electrolytic capacitor H14 holds in the palm H13 and second mounting panel A11 through electric capacity lid H12, electric capacity and fixes holding chamber F under and holds chamber E position on, has the opening on electric capacity lid H12 simultaneously, and electrolytic capacitor H14's electrode post passes the opening and exposes the electrode face, and winding displacement I arranges on the electrode face rather than the electrical connection.

In a further embodiment, the circuit module G comprises a rectifying module G15 and an inverting module G16, the rectifying module G15 is arranged on the radiator B2 side by side, the bottom surface of the rectifying module G15 is attached to the surface of the radiator B2, the inverting module G16 is uniformly arranged on the radiator B2, the bottom surface of the inverting module G16 is attached to the surface of the radiator B2, and heat-conducting silicone grease is coated between the rectifying module G15 and the inverting module G16 as well as between the rectifying module G15 and the radiator B2.

In a further embodiment, the control device D includes a main control board D17, a driving board D18, and a power board D19, and is mounted and fixed on the first mounting board A7, and the main control board D17, the driving board D18, and the power board D19 are electrically connected through a cable. The cable passes through a wire passing hole formed in the first mounting plate A7 and is connected with the control device D and the circuit component C, and is also connected with the main control plate D17, the driving plate D18 and the power supply plate D19.

The embodiment further comprises a third mounting plate A20, a contactor mounting plate A21, a hanging bar A22 and at least one contactor C23, wherein the third mounting plate A20 is positioned in the upper accommodating cavity E and fixed on the support A8 and the first mounting plate A7 for mounting the control device D, the contactor mounting plate A21 is positioned in the upper accommodating cavity E, the mounting surface of the contactor mounting plate A21 is attached to and fixed on the inner wall surface of the end part of the case A, the contactor C23 is fixedly mounted on the contactor mounting plate A21 and electrically connected with the circuit component C, and the hanging bar A22 is positioned on two sides of the outside of the case A and is fixedly connected to the case A.

In a further embodiment, the air conditioner further comprises a fourth mounting plate a24, at least one terminal a25 and at least one input/output port a26, where the fourth mounting plate a24 is located above the air outlet a10 and is connected and fixed to the partition plate A1, and the terminal a25 is connected and fixed to the fourth mounting plate a 24.

The input/output port a26 provides electric energy for the variable frequency power unit and an access for exchanging with the outside, and the terminal a25 is used for fixing the flat cable I.

The utility model discloses an among the frequency conversion power unit was applied to the cooling water set, can improve the efficiency of motor and system, reduce energy consumption, noise and the vibrations of motor, make its realization to the regulation of the constant temperature and pressure cooling capacity of cooling water set compressor arrangement.

While the present invention has been described in detail and with reference to the accompanying drawings, it is not to be considered as limited to the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. The utility model provides a frequency conversion power unit, includes quick-witted case, radiator unit, circuit module and controlling means, its characterized in that:

the case is a metal plate shell formed by enclosing, the inside of the case is hollow, the front side of the case is provided with an opening, a partition plate is arranged to divide the inside of the case into an upper accommodating cavity and a lower accommodating cavity, and the partition plate is provided with a plurality of openings so that the surface of the radiator is exposed out of the partition plate and used for mounting a circuit assembly;

the heat dissipation assembly comprises a radiator, a fan mounting plate and at least one heat dissipation fan, and is arranged below the case and positioned in the lower accommodating cavity;

the circuit assembly is a core component, is arranged in the chassis and is distributed at the positions of the upper accommodating cavity and the lower accommodating cavity;

the control device is arranged above the circuit component and is positioned in the upper accommodating cavity, and the circuit component is electrically connected with the control device through a cable.

2. The variable frequency power unit of claim 1, wherein: the case also comprises an upper cover plate, a lower cover plate, a first mounting plate and a plurality of brackets;

the brackets are arranged on the inner walls of the two sides of the case;

the first mounting plate is positioned in the middle of the upper accommodating cavity and is fixedly connected to the bracket, and a plurality of wire passing holes are formed in the first mounting plate;

the upper cover plate and the lower cover plate are positioned at the top of the case, are covered with the opening of the case and are fixedly connected with the opening of the case so as to seal the upper accommodating cavity, and are provided with holes.

3. The variable frequency power unit of claim 1, wherein: and the two end parts of the case are respectively provided with an air inlet and an air outlet and are both positioned in the lower accommodating cavity.

4. The variable frequency power unit of claim 3, wherein: the fan mounting plate is arranged at the air inlet, the heat dissipation fan is mounted on the fan mounting plate, the radiator is positioned in the middle of the lower accommodating cavity and is connected and fixed to the back of the partition plate to seal the lower accommodating cavity.

5. The variable frequency power unit of claim 1, wherein: the circuit assembly comprises a circuit module, a capacitor assembly and a flat cable, wherein the flat cable is positioned in the upper accommodating cavity, is arranged on the circuit module and the capacitor assembly, and is electrically connected with the circuit module and the capacitor assembly.

6. The variable frequency power unit of claim 5, wherein: the case also comprises a second mounting plate, the second mounting plate is positioned at one side of the bottom of the upper accommodating cavity, is fixed on the partition plate and the inner wall of the case, and is provided with a plurality of through holes;

the capacitor assembly comprises a capacitor cover, a capacitor support and at least one electrolytic capacitor, the capacitor cover is positioned in the upper containing cavity and fixed on the second mounting plate, the capacitor support is positioned in the lower containing cavity and abutted against the bottom of the case, the electrolytic capacitor penetrates through a through hole of the second mounting plate and positioned in the upper containing cavity and the lower containing cavity, the top of the electrolytic capacitor is sleeved with the capacitor cover and abutted against the capacitor cover, and the bottom of the electrolytic capacitor support is arranged in the capacitor support and abutted against the capacitor support.

7. The variable frequency power unit of claim 5, wherein: the circuit module comprises a rectifier module and an inverter module, wherein the rectifier module is arranged on the radiator side by side, the bottom surface of the rectifier module is attached to the surface of the radiator, the inverter module is evenly arranged on the radiator, the bottom surface of the inverter module is attached to the surface of the radiator, and heat-conducting silicone grease is coated between the rectifier module and the radiator.

8. The variable frequency power unit of claim 2, wherein: the control device comprises a main control board, a drive board and a power board, the main control board, the drive board and the power board are fixedly arranged on the first mounting board, and the main control board, the drive board and the power board are electrically connected through cables.

9. The variable frequency power unit of claim 1, wherein: still include third mounting panel, contactor mounting panel, lacing bar and at least one contactor, the third mounting panel is located and holds the intracavity and fix on support and first mounting panel for the installation control device, the contactor mounting panel is located and holds the intracavity, and its installation face is laminated mutually with quick-witted case tip internal face and is fixed, the contactor installation is fixed on the contactor mounting panel, links to each other with the circuit subassembly electrical property, the lacing bar is located quick-witted case outside both sides to connect to fix on quick-witted case.

10. The variable frequency power unit of claim 1, wherein: the air outlet structure comprises a partition board, and is characterized by further comprising a fourth mounting board, at least one terminal and at least one input/output port, wherein the fourth mounting board is located above the air outlet and is connected and fixed on the partition board, and the terminal is connected and fixed on the fourth mounting board.