KR102098925B1 - Housing structure of inverter for photovoltaic power generation apparatus - Google Patents

Abstract

Disclosed is a housing structure of an inverter for a photovoltaic power generation apparatus which can cool the inside of a housing. The housing structure of an inverter for a photovoltaic power generation apparatus comprises: a housing unit having an inverter therein, an inlet, and an outlet; a gas supply unit to suck outside gas to remove foreign substances including dust and salt and cool the outside gas to supply the outside gas into the housing unit through the inlet; and a gas discharge pipe of which one end communicates with the outlet to form a moving passage of gas to discharge gas entering through the outlet to the outside of the housing unit. The inlet and the outlet are formed on the upper surface and the lower surface of the housing unit respectively to move gas entering through the inlet downwards to discharge the gas through the outlet. The other end of the gas discharge pipe faces downwards, and at least a portion of the gas discharge pipe has a smaller cross-sectional area than the outlet to increase a discharge speed of gas in the housing unit through the gas discharge pipe and reduce entry of outside gas through the gas discharge pipe.

Description

HOUSING STRUCTURE OF INVERTER FOR PHOTOVOLTAIC POWER GENERATION APPARATUS}

The present invention relates to a housing structure of an inverter for a photovoltaic device.

The photovoltaic power generation system is largely composed of a solar cell module, a capacitor, and an inverter, and the solar cell module is a device that converts light energy into electrical energy through a photoelectric effect, and the inverter uses each DC power produced by the solar cell module. It is a device that automatically manages the entire system by converting it into AC power that can be used in the system.

Meanwhile, as the inverter repeatedly performs a high-speed switching operation in order to perform a function of power conversion, considerable heat is generated. Therefore, it is necessary to solve the heat generated by the inverter in order to operate the inverter while maintaining the durability while being normal.

Accordingly, in the related art, a blower fan is provided in a housing in which the inverter is disposed, and the inside of the housing is not sealed to cool the inside.

However, since the photovoltaic power generation system is generally installed outdoors or on the beach where sunlight is strong, air containing moisture, such as a large amount of dust and salt, may be introduced into the housing, and accordingly, malfunction of the inverter due to dust, etc. This could occur, and in a salty environment, salt could corrode the inverters in the housing.

The background technology of the present application is disclosed in Korean Patent Publication No. 10-2014-0077413.

The present application is to solve the problems of the prior art described above, and aims to provide a housing structure of an inverter for a photovoltaic device capable of preventing dust and salt from accumulating in the housing and cooling the inside of the housing.

However, the technical problems to be achieved by the embodiments of the present application are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above-described technical problem, the housing structure of the inverter for a photovoltaic device according to the first aspect of the present application includes: a housing unit in which an inverter is provided and an inlet and an outlet are formed; A gas supply unit that sucks external gas to remove foreign substances including dust and salt and cools it to supply the inside of the housing unit through the inlet; And a gas outlet pipe having one end communicating with the exhaust port so as to allow gas flowing through the exhaust port to be discharged to the outside of the housing part, wherein the gas outlet pipe forms a movement passage of the gas, wherein each of the inlet port and the exhaust port is through the inlet port. It is formed on each of the upper and lower surfaces of the housing part so that the introduced gas moves in the downward direction and is discharged through the exhaust port, and the other end of the gas discharge pipe faces downward, and the discharge rate of the gas inside the housing part through the gas is increased. And to reduce the inflow of external gas through it, at least a portion may have a smaller cross-sectional area than the exhaust port.

The above-described problem solving means are merely exemplary and should not be construed as limiting the present application. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-described problem solving means of the present application, since the foreign matter is removed and the cooled gas may be introduced into the housing part through the inlet port and discharged through the exhaust port, the temperature inside the housing part may be lowered, and the inside of the housing part may be reduced. Foreign matter, including dust, salt, etc., may be moved together with the processed gas passing through the inside of the housing portion and discharged through the exhaust port. Accordingly, foreign substances such as dust and salt are removed in the housing portion 1 and foreign substances are prevented from accumulating in the housing portion, and the temperature in the housing portion can be kept constant.

1 is a schematic front view of a housing structure of an inverter for a photovoltaic device according to an embodiment of the present application.
2 is a schematic cross-sectional view of a housing structure of an inverter for a photovoltaic device according to an embodiment of the present application.
3 is an enlarged view of A of FIG. 2.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present application pertains may easily practice. However, the present application may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Throughout this specification, when a part is "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another element in between. do.

Throughout the present specification, when a member is positioned on another member “on”, “on the top”, “top”, “bottom”, “bottom”, and “bottom”, it means that a member is on another member. This includes cases where there is another member between the two members as well as when in contact.

Throughout the present specification, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless specifically stated to the contrary.

For reference, the terms related to the direction or position in the description of the embodiment of the present application (upper, upper, upper, lower, lower, lower, etc.) are set based on the arrangement state of each component shown in the drawings. For example, when looking at FIG. 1, the 12 o'clock direction is generally upward, the portion toward the 12 o'clock direction is generally upper, and the end toward the 12 o'clock direction is generally upper, the 6 o'clock position is lower, and the overall is 6 o'clock. A portion facing the o'clock direction may be a lower portion, and an end portion generally pointing at the 6 o'clock direction may be a lower portion.

The present invention relates to a housing structure of an inverter for a photovoltaic device.

Hereinafter, a housing structure of the inverter for a photovoltaic device according to an embodiment of the present application (hereinafter referred to as a 'this housing structure') will be described.

1 is a schematic front view of a housing structure of an inverter for a photovoltaic device according to an embodiment of the present application, and FIG. 2 is a schematic cross-sectional view of a housing structure of an inverter for a photovoltaic device according to an embodiment of the present application, 3 is an enlarged view of A of FIG. 2.

1 and 2, the present housing structure includes a housing portion 1. Referring to Figure 2, the housing portion 1 is provided with an inverter therein. In addition, the inlet 11 and the exhaust port 12 are formed in the housing part 1. In addition, referring to FIG. 1, a housing (not shown) may be provided in the housing 1.

Also, referring to FIGS. 1 and 2, the housing structure includes a gas supply unit 2. The gas supply unit 2 sucks external gas to remove foreign substances including dust and salt and cools it to supply it to the interior of the housing unit 1 through the inlet 11. Accordingly, since the foreign matter is removed and the cooled gas (processed gas) can be drawn into the interior of the housing part 1 through the inlet 11 and discharged through the exhaust port 12, the interior of the housing part 1 The temperature rise of can be prevented, and foreign substances including dust, salt, etc. inside the housing part 1 are moved together with the treated gas passing through the inside of the housing part 1 to be discharged through the exhaust port 12 You can. Accordingly, foreign matter, such as dust and salt, is removed in the housing part 1 and foreign matter can be prevented from accumulating in the housing part 1. In addition, the temperature rise inside the housing part 1 may be prevented (the temperature inside the housing part 1 may be kept constant), or the inside of the housing part 1 may be cooled (the temperature may be lowered).

For reference, although not shown in detail in the drawing, the gas supply part 5 is a gas supply pipe in the form of a tube through which one side gas is introduced and the other end is connected to the inlet 11 to communicate with the inside of the housing part 1, It is provided between one end and the other end of the gas supply pipe and includes a filtering unit that filters foreign substances (dust, salt (salt)) from the gas introduced through one end, and a cooling unit that cools the inside of the gas supply pipe between the filtering unit and the other end of the gas supply pipe. Accordingly, the gas introduced through one end of the gas supply pipe passes through a filtering unit and is filtered through a portion where the temperature is lowered by the cooling unit of the gas supply pipe in a state in which foreign matter is removed, and is cooled through the inlet 11 It may be introduced into the housing portion 1. In this case, the filtering portion may include a plurality of filters, and the cooling portion may be a gas supply pipe outside the gas supply pipe. It may include a water cooling pipe that surrounds and moves the fluid, a fluid cooling unit for receiving the fluid from the water cooling pipe and cooling the received fluid to supply it to the water cooling pipe, etc. The gas supply unit 5 is self-explanatory to the skilled person. Description is omitted.

In addition, each of the inlet 11 and the exhaust port 12, the upper surface of the housing portion 1, so that the gas (processed gas) introduced through the inlet 11 moves downward and discharged through the exhaust port 12 And lower surfaces. In other words, according to the present housing structure, the inlet 11 may be formed on the upper surface of the housing portion 1, and the exhaust port 12 may be formed on the lower surface of the housing portion 1, and thus, the inlet 11 ), The processed gas introduced through may move downward and pass through the housing part 1 to be discharged to the outside of the housing part 1 through the exhaust port 12. In addition, since the movement of the processed gas is made in the vertical direction (downward direction), rapid entry and exit of the processed gas can be achieved, and the effect of removing foreign substances can be increased. To this end, it is preferable that the inlet 11 and the outlet 12 are formed at corresponding positions to face each other.

In addition, at this time, since the exhaust port 12 is formed on the lower surface of the housing part 1, the inflow of the gas outside the housing part 1 through the exhaust port 12 into the housing part 1 may be reduced. Specifically, airflow from the outside of the housing part 1 such as wind may be blown in the horizontal direction. According to the present housing structure, the exhaust port 12 may be formed on the lower surface of the housing 1 instead of the side surface. The inflow of the external gas into the housing part 1 through the exhaust port 12 may be reduced compared to the formation of the exhaust port 12 on the side surface of the unit 1.

Also, referring to FIGS. 1 and 2, the housing structure includes a gas discharge pipe 3. The gas discharge pipe 3 forms a movement path of the gas so that one end communicates with the exhaust port 12 so that the gas flowing into the gas discharge pipe 3 through the exhaust port 12 is discharged to the outside of the housing part 1. That is, the treated gas introduced through the inlet 11 may be introduced into the housing part 1, and the gas in the housing part 1 may be discharged to the outside through the exhaust port 12 and the gas discharge pipe 3 You can.

In addition, the other end of the gas discharge pipe 3 is directed downward. Since the other end of the gas discharge pipe 3 is directed to the lower side, as described above, the inflow of the external gas into the gas discharge pipe 3 may be reduced compared to the other end of the gas discharge pipe 3 facing the horizontal direction.

Also, referring to FIG. 2, the gas discharge pipe 3 has at least a portion 3b of the exhaust port 12 so that the gas discharge rate inside the housing part 1 increases through it and the inflow of external gas through it decreases. ). For example, when gas passes from the inside of the housing part 1 through the exhaust port 12 and the gas discharge pipe 3, the cross-sectional area of the gas discharge pipe 3 may pass through a portion that is smaller than the cross-sectional area of the exhaust port 12. , At this time, the exhaust rate of the gas may be increased by the Bernoulli effect.

According to the above, the processed gas is introduced into the housing part 1 through the inlet 11 to remove foreign substances including dust, salt, etc. inside the housing part 1, and then through the exhaust port 12 together. By being discharged, foreign matters can be prevented from accumulating in the housing part 1, and at this time, since each of the inlet 11 and the exhaust port 12 is formed on each of the upper and lower surfaces of the housing part 1, the processed gas is It can be quickly directed to the exhaust port 12, can be quickly passed through the gas discharge pipe 3 by the Bernoulli effect and discharged to the outside of the housing part 1. Accordingly, in the gas discharge pipe 3, the movement of the gas (the gas discharged) moving in the direction toward the outside of the housing part 1 is continuously (continuous discharge of gas due to the continuous inflow of the processed gas through the inlet 11) ) And can be made quickly (such as an increase in speed due to the Bernoulli effect), so that resistance to the inflow of external gas through the gas discharge pipe 3 is secured, so that inflow of the external gas through the gas discharge pipe 3 can be prevented.

Further, at least a part of the housing part 1 may be formed of a temperature control member 13 that absorbs heat inside the housing part 1.

Referring to FIG. 3, the temperature regulating member 13 includes at least a portion of the inner plate portion 131, the outer plate portion 132 and the inner plate portion 131 that are overlapped with the inner plate portion 132, and the outer plate portion It may be provided between at least a portion of 132 may include a Peltier element 133 that absorbs heat from the inner portion and dissipates heat from the outer portion according to the Peltier effect.

The Peltier element 133 is a device that utilizes a phenomenon in which when one type of conductor is coupled according to the Peltier effect and current flows, one contact heats up and the temperature rises and the other contact absorbs heat, thereby lowering the temperature. .

Accordingly, when power is supplied to the Peltier element 133, heat may be absorbed from the inner portion and dissipated heat from the outer portion, and the inner plate portion 131 may be provided on the inner portion of the Peltier element 133 to provide the Peltier element 133. It can protect and easily transfer the heat absorption of the Peltier element 133 (guide the movement (heat absorption) of the heat by the Peltier element 133). In addition, the outer plate portion 132 is provided on the outer portion of the Peltier element 133 to protect the Peltier element 133 and can easily transfer heat generated from the Peltier element 133. Accordingly, although the inner plate portion 131 and the outer plate portion 132 are made of a ceramic material, they are made of various materials as long as they are materials that can easily transfer hot or cold air emitted from the Peltier element 133. Can be.

Accordingly, the inner plate portion 131 may be absorbed by the Peltier element 133, and the outer plate portion 132 may be heated by the Peltier element 133. In addition, the temperature control member 13 may be provided such that the inner plate portion 131 faces the inner side of the housing portion 1 and the outer plate portion 132 faces the outer side of the housing portion 1. Accordingly, at least a portion of the housing portion 1 (the portion where the temperature adjusting member 13 is provided) may have an inner surface of the inner plate portion 131 and an outer plate portion of the outer plate portion 132.

Also, referring to FIGS. 2 and 3, the housing structure includes a power supply unit 4 that receives a part of the power converted by an inverter provided inside the housing unit 1 and supplies it to the Peltier element 133. It can contain. Accordingly, the housing structure can drive the Peltier element 133 by itself using the power converted by the inverter accommodated in the housing structure without using external power, so that the aforementioned heat absorption and heat generation can occur.

In addition, referring to FIG. 3, the housing structure may include a heat dissipation fin portion 5 provided on at least a portion of the outer surface of the outer plate portion 132. Accordingly, the heat of the outer plate portion 132 in which heat is generated by the Peltier element 133 can be easily dissipated.

In addition, the housing structure is a heat transfer unit for transferring the heat of the outer plate portion 132 to the gas discharge pipe (3), so that the discharge rate (moving speed (passing speed)) of the gas passing through the gas discharge pipe (3) increases 6) The heat transfer part 6 may be formed of a heat conductor having a high thermal conductivity, and one end may be provided to contact the outer plate part 132 and the other end to contact the gas discharge pipe 3. Accordingly, heat of the outer plate portion 132 may be transferred to the gas discharge pipe 3 through the heat transfer portion 6.

Accordingly, the gas discharge pipe 3 may be heated to increase its internal temperature, and accordingly, the moving speed of the gas passing through the gas discharge pipe 3 may be increased to discharge the gas inside the housing part 1 more quickly. Can be. In addition, since the heat of the outer plate portion 132 is transferred to the gas discharge pipe 3, the outer plate portion 132 can be cooled more quickly.

In addition, the heat transfer portion 6, the exhaust port 12 of the gas discharge pipe 3, so that heat from the outer plate portion 132 is prevented from being transferred to the housing portion 1 through the gas discharge pipe 3 below a predetermined level ) Can transfer heat of the outer plate portion 132 to a portion spaced apart from a predetermined interval or more. Accordingly, even if the gas discharge pipe 3 is heated, it is possible to prevent the housing part 1 from being heated. For reference, in FIG. 2, the spacing between the spaced apart portion (the portion where heat is transferred) and the exhaust port 12 is illustrated by reference numeral 3a.

In addition, a plurality of side surfaces of the housing part 1 may be provided. For example, the housing 1 may have four sides when the cross section is rectangular.

In addition, the temperature control member 13 may be provided on each of a plurality of side surfaces of the housing portion 1. In other words, each of the plurality of side surfaces of the housing part 1 may be made of at least a portion of the temperature control member 13.

In addition, the housing structure may include a light amount measurement unit 7 for measuring the amount of light incident on each of the plurality of side surfaces of the housing unit 1.

In addition, the temperature adjusting member 13 on the side of the plurality of side surfaces of the housing 1 that is incident on the amount of light or more may be turned off.

When the amount of light is irradiated to the outer plate portion 132 of the temperature adjusting member 13 for a certain amount or more, the outer plate portion 132 is overheated by acting until the heat is applied to the heated outer plate portion 132, and the temperature adjusting member 13 ) May be damaged, or the heat absorbing effect (cooling effect) on the inside of the housing portion 1 of the overheated portion of the temperature control member 13 may be reduced. In particular, considering the fact that the solar power system (this housing structure in which the inverter is accommodated) is installed in a strong outdoor environment, it is important to consider the incident of sunlight. Accordingly, when the amount of light incident on the outer plate portion 132 is greater than or equal to a preset value, it may be preferable that the temperature adjusting member 13 is turned off.

Accordingly, the present housing structure, as the sun moves, the amount of light incident on each of the plurality of side surfaces of the housing part 1 depends on the direction, time, etc. of each side surface of the housing part 1, the housing part 1 Taking into account that it may be different for each of the plurality of sides, measuring the amount of light incident on each of the plurality of sides, if the amount of light incident among the plurality of sides is a preset value or more, turn off the temperature control member 13 of the side can do. At this time, even if the temperature control member 13 of the side is off, since the temperature control member 13 of the other side is on (on), the heat absorbing effect on the inside of the housing portion 1 by the temperature control member 13 Can last.

For reference, off of the temperature control member 13 may be performed by cutting off the power supply of the power supply unit 4. For example, the power supply unit 4 may selectively supply power or cancel power supply to each of the temperature control members 13 of each of a plurality of side surfaces of the housing unit 1. Accordingly, the power supply unit 4 stops supplying power to the temperature control member 13 of the plurality of side surfaces of the housing unit 1, each of which has a predetermined amount of light or more incident on the temperature control member 13, corresponding to The temperature regulating member 13 can be turned off.

In addition, the temperature control member 13 on the side of the plurality of side surfaces of the housing 1 having an incident light amount less than a preset value may be turned on. Accordingly, since the amount of incident light is a preset value, the turned off temperature control member 13 may be turned on when the incident amount of light is less than a preset value.

On the other hand, the preset value, whether the outer plate portion 132 is damaged according to the amount of heat generated by the outer plate portion 132 of the temperature control member 13 and the amount of incident light, the heat absorption efficiency of the temperature control member 13, etc. It can be set in consideration.

In addition, the housing structure may include a control unit. The control unit may control the temperature adjusting member 13, the power supply unit 4, and the like. Accordingly, the on-off adjustment of the above-described temperature control member 13 may be performed by the control unit.

In addition, the housing structure may include a wind direction and wind speed measurement unit. Further, the wind direction and wind speed measurement unit may measure the wind direction and wind speed of the wind in the housing 1. In addition, among the temperature control members 13 provided on each of the plurality of side surfaces of the housing part 1, the temperature control member 13 on the side of the side having a predetermined amount or more of the incident light amount has a wind speed blowing toward the side provided with it. If it is higher than a preset value, it may not be off. This may be because the heat dissipation effect of the outer plate portion 132 is high due to wind even if the amount of light is greater than or equal to a preset value.

That is, in the present housing structure, the control unit turns off the temperature adjusting member 13 on the side of the plurality of sides of the housing portion 1 that is more than a preset value, and the amount of light incident among the plurality of sides is preset. Turning on the temperature control member 13 on the side of the value less than the value, for the side where the amount of incident light is greater than or equal to the preset value, even if the amount of incident light is greater than or equal to the preset value, the direction in which the side where the incident light amount is greater than or equal to the preset value goes If it has a direction opposite to the wind direction (negative direction) of the wind having a wind speed greater than or equal to the set value, it may be turned on without turning off the temperature control member 13 on the side.

In other words, the temperature adjusting member 13 on the side of the plurality of side surfaces of the housing portion 1 that is more than a preset value is off, and the temperature adjusting member on the side surface where the amount of light incident among the plurality of side surfaces is less than a preset value. If (13) is turned on, but the direction in which the side where the amount of light incident is greater than or equal to the preset value has a wind speed having a wind speed equal to or higher than the preset value (the negative direction), the incident light amount is preset. The above aspect can be turned on.

The above description of the present application is for illustrative purposes, and those skilled in the art to which the present application pertains will understand that it is possible to easily modify to other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the claims below, rather than the detailed description, and it should be interpreted that all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present application.

1: Housing part
11: inlet
12: vent
13: absence of temperature control
131: inner plate portion
132: outer plate portion
133: Peltier element
2: gas supply
3: gas discharge pipe
4: Power supply
5: radiating fin part
6: Heat transfer section
7: Light intensity measurement unit

Claims (8)

In the housing structure of the inverter for a photovoltaic device,
A housing unit provided with an inverter therein and having an inlet and an outlet;
A gas supply unit that sucks external gas to remove foreign substances including dust and salt and cools it to supply the inside of the housing unit through the inlet; And
One end is in communication with the exhaust port, so that the gas flowing through the exhaust port is discharged to the outside of the housing portion, including a gas discharge pipe forming a movement passage of the gas,
Each of the inlet and the exhaust port is formed on each of the upper and lower surfaces of the housing part so that gas introduced through the inlet port moves downward and is discharged through the exhaust port,
The gas discharge pipe has at least a portion of a smaller cross-sectional area than the exhaust port, so that the other end faces downward, and the rate of discharge of gas inside the housing portion through it increases and the inflow of gas through the outside decreases.
At least a portion of the housing portion is made of a temperature control member that absorbs heat inside the housing portion,
The temperature control member,
It is provided between the inner plate portion, the outer plate portion overlapping the inner plate portion, and at least a portion of the inner plate portion and at least a portion of the outer plate portion to absorb heat from the inner portion and dissipate heat from the outer portion according to the Peltier effect. Peltier elements include,
The inner plate portion is endothermic by the Peltier element,
The outer plate portion is heated by the Peltier element,
At least a portion of the housing portion has an inner surface as the inner plate portion, an outer surface as the outer plate portion,
A housing structure of an inverter for a photovoltaic device, further comprising a heat transfer part transferring heat of the outer plate portion to the gas discharge pipe so that a rate of discharge of gas passing through the gas discharge pipe increases. delete delete According to claim 1,
A housing structure of an inverter for a photovoltaic device, further comprising a power supply unit that receives a portion of the power converted by the inverter provided inside the housing unit and supplies it to the Peltier element. According to claim 4,
A housing structure of an inverter for a photovoltaic device further comprising a heat dissipation fin portion provided on at least a portion of the outer surface of the outer plate portion. delete According to claim 1,
The heat transfer part transfers heat of the outer plate part to a part spaced apart from a predetermined interval or more from the exhaust port of the gas discharge tube so that heat from the outer plate part is prevented from being transferred to the housing part through the gas discharge pipe below a predetermined level. That is, the housing structure of the inverter for a photovoltaic device. The method of claim 7,
The temperature control member is provided on each of a plurality of side surfaces of the housing,
Further comprising a light amount measuring unit for measuring the amount of light incident on each of the plurality of side surfaces of the housing portion,
Among the plurality of side surfaces of the housing portion, the temperature control member of the side surface having an amount of light incident on or higher than a preset value is turned off,
The housing structure of the inverter for a photovoltaic device, wherein the temperature control member of a side surface in which the amount of light incident among the plurality of side surfaces of the housing portion is less than the preset value is turned on.

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