Frequency converter and air conditioner

Abstract

The present invention discloses a frequency converter and an air conditioner. The frequency converter (100) includes a cabinet body, an air cooling device, and multiple air duct partitions (16). The multiple air duct partitions (16) divide the cabinet cavity into multiple module chambers for respectively installing different modules. Each of the air duct partitions (16) of the module chambers is provided with an air inlet and an air outlet for the module chamber. A circulating air flow channel flowing through each of the air inlets and the air outlets of the module chambers is formed in the cabinet cavity, and the air cooling device is arranged in the circulating air flow channel. By adopting the air duct partitions to set the circulating air flow channel in the cabinet cavity, the frequency converter of the present invention realizes circulating heat dissipation in the cabinet cavity, which is beneficial to improving the heat dissipation effect of the frequency converter, reducing its working noise, and saving its production and installation costs.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an inverter and an air conditioner. Background Art

[0002] Existing inverters usually adopt air-cooled or water-cooled structures for heat dissipation, thereby reducing the risk of overheating and damage of internal components, and thus improving stability and reliability.

[0003] However, due to the large cooling load requirement of the inverter, when using air-cooling technology for heat dissipation, a relatively large fan is required to provide sufficient air volume, resulting in relatively large fan noise and the overall volume of the inverter. In addition, when the fan exhausts air, in order to avoid the increase of the ambient temperature of the unit, an additional air conditioning system needs to be installed in the machine room, thus increasing the heat dissipation cost.

[0004] On the other hand, when using water-cooling technology for heat dissipation, an external water supply system is usually required. After a certain service life, scale will form in the water supply pipeline, resulting in poor heat exchange effect. In addition, due to the relatively high conductivity of water, once the water supply pipeline leaks, it will cause a short circuit in the inverter circuit, resulting in damage to internal components and relatively low reliability. Summary of the Invention

[0005] Aiming at the above-mentioned defects or deficiencies of the prior art, the present invention provides an inverter and an air conditioner, which can improve the heat dissipation effect of the inverter, reduce its working noise and save its production and installation costs on the premise of using an air-cooling device for heat dissipation.

[0006] To achieve the above object, the present invention provides an inverter, which includes a cabinet body, an air-cooling device and a plurality of air duct partitions. The plurality of air duct partitions divide the cabinet cavity into a plurality of module chambers for respectively installing different modules. Each air duct partition of each module chamber is provided with a module chamber air inlet and a module chamber air outlet, and a circulating air flow channel flowing through each module chamber air inlet and the module chamber air outlet is formed in the cabinet cavity, and the air-cooling device is arranged in the circulating air flow channel.

[0007] Optionally, the air-cooling device includes a fan and a cooling and dehumidifying radiator for cooling and dehumidifying.

[0008] Optionally, the module chamber includes a cooling and dehumidifying module chamber, and the air-cooling device is arranged at the bottom of the cooling and dehumidifying module chamber.

[0009] Optionally, the cabinet body is in a cuboid shape, and the air duct partition and the cabinet top panel, cabinet bottom panel, cabinet front panel, cabinet rear panel and one of the cabinet side panels of the cabinet body jointly define the cooling and dehumidifying module chamber.

[0010] Optionally, the cooling and dehumidifying radiator is installed between the blower and the side panel of the cabinet, or the blower is installed between the cooling and dehumidifying radiator and the side panel of the cabinet, or both the cooling and dehumidifying radiator and the blower are installed on the air duct partition of the cooling and dehumidifying module chamber.

[0011] Optionally, the module chamber air outlet and the module chamber air inlet of the cooling and dehumidifying module chamber are arranged vertically on the air duct partition of the cooling and dehumidifying module chamber, and the blower is installed on the module chamber air inlet of the cooling and dehumidifying module chamber.

[0012] Optionally, the module chamber includes a first functional module chamber, a second functional module chamber, a third functional module chamber, and a fourth functional module chamber. The first functional module chamber, the second functional module chamber, and the third functional module chamber are arranged vertically in sequence, and their left and right sides are adjacent to the cooling and dehumidifying module chamber and the fourth functional module chamber respectively;

[0013] Among them, the first functional module chamber, the second functional module chamber, and the third functional module chamber are respectively in air flow communication with the cooling and dehumidifying module chamber and the fourth functional module chamber through their respective module chamber air inlets and module chamber air outlets.

[0014] Optionally, the frequency converter includes a main control board and an IGBT module arranged in the first functional module chamber, a capacitor module arranged in the second functional module chamber, a diode and a contactor arranged in the third functional module chamber, and a circuit breaker arranged in the fourth functional module chamber. An inductor is provided between the third functional module chamber and the fourth functional module chamber.

[0015] Optionally, the frequency converter includes an IGBT radiator for dissipating heat from the IGBT module and a diode radiator for dissipating heat from the diode.

[0016] Optionally, both the module chamber air inlet and the module chamber air outlet are ventilation holes with adjustable aperture sizes.

[0017] In addition, the present invention also provides an air conditioner using the above frequency converter.

[0018] By using a partition to set a circulating air flow channel in the inner cavity of the housing and arranging an air cooling device in the circulating air flow channel, the frequency converter of the present invention can greatly reduce the requirement for the air discharge volume of the air cooling device and can achieve circulating heat dissipation. Therefore, the heat dissipation effect is stable and efficient. In addition, due to the reduction in the requirement for the air discharge volume, the working noise of the air cooling device is reduced and the size of the device is reduced, thereby improving the reliability of the frequency converter and saving its production and installation costs.

[0019] Other features and advantages of the present invention will be described in detail in the following specific implementation section. Description of the Drawings

[0020] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0021] Figure 1 It is a schematic structural diagram of the frequency converter in the specific implementation of the present invention.

[0022] Description of the reference numerals:

[0023] 100 Frequency converter

[0024] 1 Cooling and dehumidification module chamber 2 First functional module chamber

[0025] 3 Second functional module chamber 4 Third functional module chamber

[0026] 5 Fourth functional module chamber 6 Ventilation hole

[0027] 7 Fan 8 Cooling and dehumidification radiator

[0028] 9 Main control board 10 IGBT module

[0029] 11 Capacitor module 12 Diode

[0030] 13 Contactor 14 Circuit breaker

[0031] 15 Reactor 16 Air duct partition Specific Implementation

[0032] The following will describe in detail the specific implementation of the present invention with reference to the drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0033] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0034] In the present invention, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are generally in the direction shown in the drawings or in the vertical, perpendicular or gravitational direction for describing the relative position relationship of the components.

[0035] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0036] Refer to Figure 1, the present invention provides a frequency converter 100. The frequency converter 100 includes a cabinet body, an air-cooling device, and multiple air duct partitions 16. Among them, the multiple air duct partitions 16 divide the cabinet cavity into multiple module chambers, and the multiple module chambers are respectively used to install different modules, such as various circuit function modules, etc., and each air duct partition 16 of each module chamber is provided with its own module chamber air inlet and module chamber air outlet (i.e., ventilation hole 6). By setting this structure, a circulating air flow channel capable of flowing through each module chamber air inlet and module chamber air outlet is formed in the cabinet cavity, and the arrow direction in the figure indicates the air flow direction of the circulating air flow channel in one embodiment. In addition, an air-cooling device is provided in the circulating air flow channel.

[0037] During the working process of the frequency converter 100, the functional modules in some module chambers will generate heat. At this time, the air-cooling device is in a working state, and the cold air discharged from the exhaust end of the air-cooling device can flow through each module chamber air inlet and module chamber air outlet into different module chambers, and finally return to the suction end of the air-cooling device, thereby forming the above-mentioned circulating air flow channel for heat dissipation and cooling.

[0038] It can be seen that due to the existence of the circulating air flow channel, the heat dissipation and cooling of the air-cooling device to each functional module are continuous and stable. Coupled with the relative independence (heat insulation effect) between each module chamber, it can ensure that each chamber always has a suitable working environment temperature, prevent condensation due to local overcooling, thereby avoiding short-circuit of the frequency converter, and greatly improving the working reliability of the frequency converter.

[0039] In addition, compared with the existing frequency converters, on the premise of achieving the same heat dissipation effect, the exhaust air volume of the air-cooling device in the frequency converter 100 of the present invention is smaller, which means that the working noise of the air-cooling device of the present invention is smaller, and it can be designed into a smaller volume, thereby saving the production and installation costs of the frequency converter.

[0040] All in all, the frequency converter of the present invention has the advantages of good heat dissipation effect, low working noise, and low production and installation costs.

[0041] In some embodiments, the module chamber includes a temperature reduction and dehumidification module chamber 1 for installing the above-mentioned air-cooling device. Of course, the air-cooling device can also be installed in other module chambers without the need for a separately provided temperature reduction and dehumidification module chamber 1. Since the air-cooling device will generate continuous vibration during the working process, in order to minimize the adverse impact of this vibration on the frequency converter 100, the air-cooling device can be arranged at the bottom position of the temperature reduction and dehumidification module chamber 1, thereby improving the overall stability of the frequency converter.

[0042] To save production costs, the number of required air duct partitions 16 can be determined based on the principle of separating as many module chambers as possible with as few air duct partitions 16 as possible. Moreover, the relative positions and connection structures between the module chambers should be reasonably arranged to minimize the air flow resistance in the circulating air flow channel and accelerate the heat exchange speed in the channel, thereby further improving the heat dissipation efficiency.

[0043] Therefore, in the above embodiment, the cabinet of the frequency converter 100 can be set in a cuboid shape, and the air duct partition 16, the top panel of the cabinet, the bottom panel of the cabinet, the front panel of the cabinet, the rear panel of the cabinet, and one of the side panels of the cabinet are used together to define the cooling and dehumidifying module chamber 1. It should be noted that the front panel of the cabinet can be a pivotable door body of the cabinet. Or, the front panel of the cabinet can be a partition provided between the pivotable door body and the cooling and dehumidifying module chamber 1. By using different panels of the cabinet, the number of air duct partitions 16 can be effectively saved, and setting the cooling and dehumidifying module chamber 1 at the side position in the inner cavity of the cabinet can facilitate the reasonable arrangement and connection of other module chambers.

[0044] In addition, the air cooling device includes a fan 7 and a cooling and dehumidifying radiator 8. The cooling and dehumidifying radiator 8 can be arranged at the exhaust end or the suction end of the fan 7. Driven by the fan 7, the low-temperature gas cooled by the cooling and dehumidifying radiator 8 can flow rapidly along the circulating air flow channel. In the above embodiment, the cooling and dehumidifying radiator 8 can be installed between the fan 7 and the side panel of the cabinet, or the fan 7 can be installed between the cooling and dehumidifying radiator 8 and the side panel of the cabinet, or both the cooling and dehumidifying radiator 8 and the fan 7 can be installed on the air duct partition 16 of the cooling and dehumidifying module chamber 1.

[0045] Furthermore, the module chamber air outlet and the module chamber air inlet of the cooling and dehumidifying module chamber 1 are arranged vertically on the air duct partition 16 of the cooling and dehumidifying module chamber 1, and the fan 7 is installed on the module chamber air inlet of the cooling and dehumidifying module chamber 1. In this structure, it can effectively prevent the fan 7 from blowing the condensed water on the cooling and dehumidifying radiator 8 into the adjacent module chamber, preventing short circuits of other functional modules, thereby improving the stability and reliability of the frequency converter 100. Or, in the case where the fan 7 may blow the condensed water on the cooling and dehumidifying radiator 8 into the adjacent module chamber, a corresponding water isolation structure can be additionally provided.

[0046] Next, the layout structure of each module chamber of the frequency converter 100 in the drawings will be used as an exemplary illustration of the present invention. In fact, the various module chambers in the frequency converter 100 of the present invention can be set in other different layout structures, but it must be ensured that a circulating air flow channel for heat dissipation and cooling is formed in the inner cavity of the cabinet.

[0047] Refer to Figure 1, the module chamber further includes a first functional module chamber 2, a second functional module chamber 3, a third functional module chamber 4, and a fourth functional module chamber 5. Specifically, the first functional module chamber 2, the second functional module chamber 3, and the third functional module chamber 4 are arranged in sequence from top to bottom, and their left and right sides are adjacent to the cooling and dehumidification module chamber 1 and the fourth functional module chamber 5 respectively.

[0048] Among them, the first functional module chamber 2, the second functional module chamber 3, and the third functional module chamber 4 are respectively communicated with the cooling and dehumidification module chamber 1 and the fourth functional module chamber 5 through their respective ventilation holes 6.

[0049] In the working state of the frequency converter 100, after the cold air discharged from the discharge end of the air-cooling device blows out from the cooling and dehumidification module chamber 1, it is divided into two paths to flow to the first functional module chamber 2 and the second functional module chamber 3 respectively. Immediately afterwards, the cold air blown out from the first functional module chamber 2 and the second functional module chamber 3 converges to the fourth functional module chamber 5. Then, the cold air blown out from the fourth functional module chamber 5 returns to the air intake end of the air-cooling device after passing through the third functional module chamber 4, thus completing a heat dissipation cycle process.

[0050] Specifically, the frequency converter 100 includes a main control board 9 and an IGBT module 10 arranged in the first functional module chamber 2, a capacitor module 11 arranged in the second functional module chamber 3, a diode 12 and a contactor 13 arranged in the third functional module chamber 4, and a circuit breaker 14 arranged in the fourth functional module chamber 5. In addition, a reactor 15 is provided between the third functional module chamber 4 and the fourth functional module chamber 5.

[0051] It should be noted that in the frequency converter 100, the IGBT module 10, the capacitor module 11, and the diode 12 are all functional modules with relatively large heat generation. To avoid the environmental temperature in a single module chamber from being too high, these three functional modules need to be separated from each other in pairs. Therefore, in the illustrated embodiment, the frequency converter 100 arranges the IGBT module 10 in the first functional module chamber 2, the capacitor module 11 in the second functional module chamber 3, and the diode 12 in the third functional module chamber 4.

[0052] Furthermore, since the volume of the capacitor module 11 and the circuit breaker 14 is relatively large, preferably, the capacitor module 11 is separately arranged in the second functional module chamber 3, and the circuit breaker 14 is separately arranged in the fourth functional module chamber 5 to facilitate external power connection.

[0053] Function modules with relatively small volume and heat generation can be combined and arranged in the same chamber according to actual conditions. For example, in the above structure, the main control board 9 and the IGBT module 10 can be combined and arranged in the first function module chamber 2, and the diode 12 and the contactor 13 can be combined and arranged in the third function module chamber 4.

[0054] For the reactor 15, due to its relatively large volume, it can be arranged at the bottom position (between the third function module chamber 4 and the fourth function module chamber 5) to increase the installation stability, so that the functional modules in the frequency converter 100 have a relatively reasonable layout structure.

[0055] For the IGBT module 10 and the diode 12 with relatively large heat generation, heat sinks can also be respectively arranged to further improve the heat dissipation speed. For example, an IGBT heat sink for dissipating heat from the IGBT module 10 and a diode heat sink for dissipating heat from the diode 12 can be arranged.

[0056] In addition, different air volumes can be distributed according to the heat generation in different module chambers. At this time, the aperture sizes of the module chamber air inlet and the module chamber air outlet (i.e., the ventilation holes 6) can be adjusted, which can effectively prevent the generation of condensate water in each functional module under high temperature and high humidity conditions, thereby improving the reliability of the frequency converter 100.

[0057] The present invention also provides an air conditioner using the above frequency converter 100, which has the advantages of good heat dissipation effect, low working noise, and low production and installation costs.

[0058] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0059] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0060] Furthermore, any combination can be made between different embodiments of the present invention as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A frequency converter, characterized in that, the frequency converter (100) includes a cabinet body, an air-cooling device and multiple air duct partitions (16). The multiple air duct partitions (16) divide the cabinet cavity into multiple module chambers for respectively installing different modules. Each of the air duct partitions (16) of the module chambers is provided with a module chamber air inlet and a module chamber air outlet. A circulating air flow channel flowing through each of the module chamber air inlets and the module chamber air outlets is formed in the cabinet cavity. The air-cooling device is arranged in the circulating air flow channel and includes a fan (7) and a cooling and dehumidifying radiator (8) for cooling and dehumidifying. The module chamber includes a cooling and dehumidifying module chamber (1). The air-cooling device is provided at the bottom of the cooling and dehumidifying module chamber (1). The cabinet body is in a cuboid shape. The air duct partition (16) and the cabinet top panel, cabinet bottom panel, cabinet front panel, cabinet rear panel and one of the cabinet side panels of the cabinet body jointly define the cooling and dehumidifying module chamber (1); wherein, the cooling and dehumidifying radiator (8) is installed between the fan (7) and the cabinet side panel; or the fan (7) is installed between the cooling and dehumidifying radiator (8) and the cabinet side panel; or both the cooling and dehumidifying radiator (8) and the fan (7) are installed on the air duct partition (16) of the cooling and dehumidifying module chamber (1), and the fan (7) is installed on the module chamber air inlet of the cooling and dehumidifying module chamber (1); the module chamber includes a first function module chamber (2), a second function module chamber (3), a third function module chamber (4) and a fourth function module chamber (5). The first function module chamber (2), the second function module chamber (3) and the third function module chamber (4) are arranged vertically in sequence and are respectively adjacent to the cooling and dehumidifying module chamber (1) and the fourth function module chamber (5) on the left and right sides; wherein, the first function module chamber (2), the second function module chamber (3) and the third function module chamber (4) are respectively in air flow communication with the cooling and dehumidifying module chamber (1) and the fourth function module chamber (5) through their respective module chamber air inlets and module chamber air outlets.

2. The frequency converter according to claim 1, characterized in that, the module chamber air outlet and the module chamber air inlet of the cooling and dehumidifying module chamber (1) are arranged vertically on the air duct partition (16) of the cooling and dehumidifying module chamber (1).

3. The frequency converter according to claim 2, characterized in that, The frequency converter (100) includes a main control board (9) and an IGBT module (10) disposed in the first functional module chamber (2), a capacitor module (11) disposed in the second functional module chamber (3), a diode (12) and a contactor (13) disposed in the third functional module chamber (4), and a circuit breaker (14) disposed in the fourth functional module chamber (5). An inductor (15) is provided between the third functional module chamber (4) and the fourth functional module chamber (5).

4. The frequency converter according to claim 3, characterized in that, the frequency converter (100) includes an IGBT radiator for dissipating heat from the IGBT module (10) and a diode radiator for dissipating heat from the diode (12).

5. The frequency converter according to any one of claims 1 to 4, characterized in that, both the module chamber air inlet and the module chamber air outlet are ventilation holes (6) with adjustable aperture sizes.

6. An air conditioner, characterized in that, the air conditioner includes the frequency converter (100) according to any one of claims 1 to 5.

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