Cob-type lighting lamp capable of promoting flowering and fruit-setting of crops

Abstract

The present invention relates to a COB-type lighting lamp capable of promoting flowering and fruit-setting of crops, comprising: a main body; a light irradiation unit having a main LED module, which is provided in the main body so as to generate light of a predetermined wavelength band, and at least one sub-LED module, which is provided in the main body at a position adjacent to the main LED module so as to generate light of a predetermined wavelength band; an LED cooling unit provided in the main body in order to cool the light irradiation unit; a power supply unit for supplying power to the light irradiation unit; and a switch unit which is provided in the main body so as to control power to be supplied from the power supply unit to the sub-LED module, and which cuts off power to be supplied to a corresponding sub-LED module when the temperature of the light irradiation unit is higher than or equal to a preset temperature. In the COB-type lighting lamp capable of promoting flowering and fruit-setting of crops, according to the present invention, when the temperature of the light irradiation unit increases due to a defect of a cooling device, the operation of some of the LEDs of the light irradiation unit can be stopped to lower heat generation, and thus lighting can be stably provided for a relatively long time until repair work is completed.

Description

COB type lighting lamp capable of crop flowering and fruit setting

[0001] The present invention relates to a COB (Chip On Board) type lighting lamp capable of enabling flowering and fruit setting of crops, and more specifically, to a COB type lighting lamp capable of enabling flowering and fruit setting of crops that can stably output light even if a defect occurs in the cooling means.

[0002] Generally, a light-emitting diode (LED) is a device that emits light when electrons and holes combine at a PN semiconductor junction by the application of current, and is typically manufactured in the structure of a package equipped with an LED chip, commonly referred to as an 'LED package'.

[0003] The above LED package is generally mounted on a printed circuit board (hereinafter referred to as 'PCB') and configured to emit light by receiving current from an electrode formed on the printed circuit board. A lamp using such an LED package has the advantages of low power consumption, a long lifespan, and being environmentally friendly compared to conventional lamps.

[0004] As mentioned above, LED lighting possesses outstanding characteristics such as excellent vibration resistance, high reliability, and low power consumption, and continuous research is being conducted to popularize it. Unlike conventional glass bulbs, it serves as a solid-state point light source; although the light output per unit is very low, its robustness allows multiple units to be arranged to produce lamps with desired outputs. Currently, the LED lighting sector is growing rapidly, and as a next-generation light source, it is expected to be applied in all industrial sectors and daily life.

[0005] However, conventional COB type lighting consisting of Chip On Board LEDs has difficulty providing stable lighting until repair work on the cooling device and LEDs is completed, as the LEDs are damaged relatively quickly due to heat when a defect occurs in the cooling device.

[0006] The present invention was devised to improve upon the aforementioned problems, and aims to provide a COB type lighting lamp capable of enabling flowering and fruit setting of crops, which can reduce heat generation by stopping the operation of some of the LEDs in the light irradiation unit when the temperature of the light irradiation unit rises due to a defect in the cooling device.

[0007] A COB type lighting lamp capable of flowering and fruit setting of crops according to the present invention for achieving the above objective comprises: a main body; a main LED module installed in the main body that generates light of a predetermined wavelength range; a light irradiation unit provided with at least one sub-LED module installed in the main body at a position adjacent to the main LED module that generates light of a predetermined wavelength range; an LED cooling unit installed in the main body to cool the light irradiation unit; a power supply unit that supplies power to the light irradiation unit; and a switch unit installed in the main body that controls the power supplied from the power supply unit to the sub-LED module, wherein the power supplied to the sub-LED module is cut off when the light irradiation unit is above a preset temperature. The LED cooling unit comprises a plurality of thermoelectric elements whose upper and lower surfaces are respectively cooled and heated by electricity applied from the power supply unit, and the thermoelectric elements are sequentially stacked along the vertical direction, and the cooling module is arranged such that the lower surface being cooled contacts the upper surface being heated of the thermoelectric element adjacent to the lower side. The light irradiation unit is installed at the bottom of the lowest thermoelectric element among the above thermoelectric elements.

[0008] The above switch unit comprises a first connection terminal connected to the power supply unit, a second connection terminal connected to the sub-LED module, and a bimetal member disposed adjacent to the light irradiation unit, wherein one end is connected to either the first or second connection terminal and the other end is in contact with the other of the first or second connection terminal so as to transmit power supplied from the power supply unit to the second connection terminal, and the other end is provided with a bimetal member that is deformed by the heat of the light irradiation unit when the temperature of the light irradiation unit is above the set temperature, and the other end is separated from the other of the first or second connection terminal.

[0009] The above LED cooling unit may further comprise a heat dissipation fin installed on the upper surface of the uppermost thermoelectric element among the thermoelectric elements to dissipate heat from the upper surface of the thermoelectric element, and a circulation fan installed on the heat dissipation fin to forcibly circulate air to the heat dissipation fin.

[0010] The above sub-LED modules are provided in multiple quantities, and the switch unit can cut off the power supply to any one of the sub-LED modules when the light irradiation unit is above the set temperature, and sequentially cut off the power supply to the remaining sub-LED modules whenever the temperature of the light irradiation unit increases by a predetermined amount while the temperature is above the set temperature.

[0011] The above main body may further comprise a cover member formed of a light-transmitting material, wherein an installation space is provided on the lower surface to be retracted upward so that the light irradiation unit can be installed therein, and one end of the cover member is rotatably installed at the lower part of the main body to open and close the open lower part of the installation space, and the other end of the cover member is restrained to be in close contact with the main body so as to close the installation space, and the restraint unit releases the restraint on the other end of the cover member so as to rotate the cover member to open the installation space so that outside air circulates toward the light irradiation unit when the temperature of the light irradiation unit is above the set temperature.

[0012] The above main body may be provided with an installation space on its lower surface that is retracted upward so that the light irradiation unit can be installed, and a cover member formed of a light-transmitting material, having one end rotatably installed at the bottom of the main body to open and close the open bottom of the installation space, and the other end of the cover member is pressed against the main body to close the installation space, and the cover member is rotated so that the other end of the cover member is separated from the main body so that the installation space is opened when the temperature of the light irradiation unit is above the set temperature, and the cover member is reciprocated within a certain angle range in a direction adjacent to or away from the main body to forcibly circulate outside air to the light irradiation unit.

[0013] In addition, the present invention separates and extracts the wavelength range of light required for the general growth of crops and the wavelength range of light required for flowering and fruit setting, processes them to have different LED arrays, and configures a structure that switches to white lighting so that the user can easily check the growth status of the crops with the naked eye.

[0014] The COB type lighting lamp capable of flowering and fruit setting of crops according to the present invention has the advantage of being able to provide stable lighting for a relatively long period until repair work is completed, as it can reduce heat generation by stopping the operation of some of the LEDs in the light irradiation unit when the temperature of the light irradiation unit rises due to a defect in the cooling device, and allows for selectively irradiating the crop with light of a suitable wavelength range according to the growth state of the crop.

[0015] FIG. 1 is a cross-sectional view of a COB type lighting lamp capable of flowering and fruit setting of crops according to an embodiment of the present invention, and

[0016] FIG. 2 is a bottom view of the light irradiation section of a COB type lighting lamp capable of flowering and fruit setting of the crop of FIG. 1, and

[0017] FIG. 3 is a block diagram of a COB type lighting lamp capable of flowering and fruit setting of the crop of FIG. 1, and

[0018] FIG. 4 is a block diagram of a COB type lighting lamp capable of flowering and fruit setting of crops according to another embodiment of the present invention, and

[0019] FIG. 5 is a bottom view of a light irradiation section of a COB type lighting lamp capable of flowering and fruit setting of crops according to another embodiment of the present invention, and

[0020] FIG. 6 is a partial cross-sectional view of a COB type lighting lamp capable of flowering and fruit setting of crops according to another embodiment of the present invention, and

[0021] FIG. 7 is a partial cross-sectional view of a COB type lighting lamp capable of flowering and fruit setting of crops according to another embodiment of the present invention.

[0022] Hereinafter, a COB type lighting lamp capable of flowering and fruit setting of crops according to an embodiment of the present invention will be described in detail with reference to the attached drawings. As the present invention is susceptible to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Similar reference numerals have been used for similar components in the description of each drawing. In the attached drawings, the dimensions of the structures are depicted enlarged from the actual dimensions to ensure clarity of the present invention.

[0023] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0024] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0025] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0026] FIGS. 1 to 3 illustrate a COB type lighting lamp (100) capable of flowering and fruit setting of crops according to the present invention.

[0027] Referring to the drawing, the COB type lighting lamp (100) capable of flowering and fruit setting of the crop comprises a main body (200), a light irradiation unit (300) provided with a main LED module (310) installed in the main body (200) to generate light of a predetermined wavelength range, a sub LED module (320) installed in the main body (200) at a position adjacent to the main LED module (310) to generate light of a predetermined wavelength range, an LED cooling unit (400) installed in the main body (200) to cool the light irradiation unit (300), a power supply unit (500) that supplies power to the light irradiation unit (300), and a power supply unit installed in the main body (200) that controls the power supplied from the power supply unit (500) to the sub LED module (320). When the light irradiation unit (300) is above a preset temperature, the sub LED A switch unit (600) is provided to cut off the power supplied to the module (320).

[0028] The main body (200) has an internal space (201) formed therein so that a cooling unit can be installed therein, and an installation space (202) is provided at the bottom for installing a light irradiation unit (300). The installation space (202) is formed to be recessed upward to a predetermined depth relative to the lower surface of the main body (200). Additionally, the installation space (202) is connected to the internal space (201) but is partitioned by a contact plate (410) of the cooling unit described later.

[0029] Additionally, the main body (200) is formed such that the upper part of the internal space (201) is open so that the heat dissipation fins (430) of the cooling unit described later can be exposed to the outside. The main body (200) is formed in a cylindrical shape extending in the vertical direction, and a cover member (203) is installed at the bottom to cover the installation space (202). At this time, it is preferable that screw threads be formed on the inner surface of the lower part of the main body (200).

[0030] The above cover member (203) is formed in a cylindrical shape having an outer diameter corresponding to the inner diameter of the main body (200) so as to cover the open lower part of the installation space (202). Screw threads are formed on the outer surface of the cover member (203) so that it can be screw-coupled to the main body (200). It is preferable that the cover member (203) be formed of a light-transmitting material so that light generated from the light irradiation unit (300) can be transmitted.

[0031] The cooling unit comprises a contact plate (410) installed inside the main body (200), a cooling module (420) having a plurality of thermoelectric elements (421) installed on the upper part of the contact plate (410), a heat dissipation fin (430) installed on the upper part of the cooling module (420), and a circulation fan (440) installed on the heat dissipation fin (430) to forcibly circulate outside air to the heat dissipation fin (430).

[0032] The above contact plate (410) is formed in a disc shape having an outer diameter corresponding to the inner diameter of the main body (200) and is installed inside the main body (200) to partition the internal space (201) and the installation space (202) of the main body (200). The contact plate (410) has a light irradiation unit (300) installed on its lower surface, and it is preferable that the contact plate (410) be formed of a metallic material with excellent thermal conductivity so that heat from the light irradiation unit (300) is easily transferred to the cooling module (420). Meanwhile, although not shown in the drawing, the light irradiation unit (300) may be installed on the lower part of the cooling module (420) instead of the contact plate (410).

[0033] The cooling module (420) is provided on the upper surface of the contact plate (410) and is equipped with a plurality of thermoelectric elements (421) stacked along the vertical direction.

[0034] The above thermoelectric element (421) is also called a Peltier element and is a semiconductor device that utilizes the Peltier effect, in which heat is generated or absorbed at the junction when current flows through the junction of two metals when two different N- and P-type semiconductors are connected in series. This allows for heat generation and absorption depending on the direction of the current, and the amount of heat generation and absorption is controlled according to the amount of current. That is, when current is passed in one direction, the upper surface emits heat to perform a heating action, and the upper surface absorbs heat to perform a cooling action. The above thermoelectric elements (421) are stacked sequentially along the vertical direction, and it is preferable that the lower surface that is cooled is arranged to come into contact with the upper surface that generates heat of the thermoelectric element (421) adjacent to the lower side.

[0035] A heat dissipation fin (430) is installed on the upper surface of the uppermost thermoelectric element (421) among the thermoelectric elements (421) to dissipate heat from the upper surface of the thermoelectric element (421). The heat dissipation fin (430) is installed to be exposed to the outside through the open upper part of the main body (200) and is formed of a metallic material with excellent thermal conductivity. A plurality of heat dissipation fins (430) are arranged spaced apart from each other on the upper surface of the thermoelectric element (421).

[0036] A circulation fan (440) is installed on the upper part of the heat dissipation fins (430) to forcibly circulate outside air to the heat dissipation fins (430). Since the circulation fan (440) utilizes a conventional air flow device to forcibly flow outside air in one direction, a detailed description is omitted.

[0037] The light irradiation unit (300) is equipped with a plurality of main LED modules (310) and a plurality of sub LED modules (320) installed on the lower surface of the contact plate (410).

[0038] The main LED module (310) comprises a first substrate (311) installed on the lower surface of a contact plate (410) and first to third LED groups (not shown) mounted on the first substrate (311) to generate light of a predetermined wavelength range.

[0039] The first substrate (311) is formed in a plate shape having a predetermined thickness, and a PCB substrate or similar substrate commonly used in the past for mounting a COB type (Chip On Board) light-emitting diode is applied. One of the first substrates (311) of the main LED modules (310) is formed in a circular shape in the central part of the contact plate (410), and the remaining first substrates (311) are formed to extend in an annular shape around the central part of the contact plate (410). At this time, it is preferable that the remaining first substrates (311) are formed to have an inner diameter corresponding to the outer diameter of one of the first substrates (311).

[0040] The first LED group comprises a plurality of first LED chips mounted on a first substrate (311) at a distance from each other along the longitudinal direction. The first LED chips are formed to emit light of three different wavelengths.

[0041] Here, the light of the first wavelength range of the first LED chip emits two lights with center wavelengths of 280 nm and 380 nm, and the shape of the emission wavelength range of the light of the first wavelength range of the first LED chip forms a needle shape centered on the center wavelength range.

[0042] The light of the second wavelength band of the first LED chip has a central wavelength band of 730 nm, and 25% to 35% of the total photon quantity of the first LED chips is emitted. The shape of the emission wavelength band of the light of the second wavelength band of the first LED chip forms a gentle bell-shaped curve centered on the central wavelength band.

[0043] The light of the third wavelength band, which emits the remainder of the total photon quantity of the first LED chips, has a central wavelength band of 780 nm and emits 45% to 55% of the total photon quantity of the first LED chips.

[0044] The second LED group comprises a plurality of second LED chips mounted on the first substrate (311) at a distance from each other along the longitudinal direction. The second LED chips are formed to emit light of three different wavelengths.

[0045] Here, the light of the first wavelength range of the second LED chips is a single light with a central wavelength range of 450 nm, which is emitted as 15% to 25% of the total photon quantity of the second LED chips. The shape of the emission wavelength range of the light of the first wavelength range of the second LED chips forms a gently pointed needle shape centered around the central wavelength range.

[0046] The light of the second wavelength band of the second LED chips has a central wavelength band of 660 nm, a wavelength band width of 630 nm to 700 nm, and emits 55% to 65% of the total photon quantity of the second LED chips. The shape of the emission wavelength band of the light of the second wavelength band of the second LED chips forms a gentle bell-shaped curve centered on the central wavelength band.

[0047] The light of the third wavelength band, which emits the remainder of the total photon quantity of the second LED chips, has a central wavelength band of 730 nm. The shape of the emission wavelength band of the light of the third wavelength band of the second LED chips forms a pointed needle shape centered around the central wavelength band.

[0048] Here, the second LED chip may be manufactured by pre-doping and solidifying a nitride-based phosphor that emits a central wavelength of 730 nm into a BLU LED chip to enable the output of the corresponding lights, and then post-doping it with a nitride-based phosphor that emits a central wavelength of 660 nm and a final wavelength of up to 700 nm, or it may be composed of single chips without doping.

[0049] The third LED group comprises a plurality of third LED chips mounted on the first substrate (311) at a distance from each other along the longitudinal direction. The third LED chips are formed to emit light with a wavelength range of 520 nm to 570 nm.

[0050] Here, it is preferable that the first to third LED chips be installed alternately and sequentially along the longitudinal centerline of the first substrate (311). At this time, the lighting module composed of the first to third LED chips constitutes a single unit light, and a plurality of lighting modules may be arranged on the first substrate (311) in a form that is directly connected to each other. Here, the first to third LED chips are each directly connected and independently grounded. The operator can selectively operate the first to third LED groups according to the vegetation condition of the plant to be grown. Alternatively, the operator can selectively operate the LED groups so that when the first to third LED groups are operated, the third LED group is turned on so that it can be easily distinguished by the naked eye, making it appear as white light with a Kelvin index of 3000K to 6500K.

[0051] The sub-LED module (320) comprises a second substrate (321) installed on the lower surface of the contact plate (410) and a fourth to sixth LED group (not shown) mounted on the second substrate (321) to generate light of a predetermined wavelength range.

[0052] The second substrate (321) is formed in a plate shape having a predetermined thickness, and a PCB substrate or similar substrate commonly used for mounting light-emitting diodes is applied. One of the second substrates (321) of the sub-LED modules (320) is formed to extend annularly around the central part of the contact plate (410). At this time, it is preferable that one of the second substrates (321) of the sub-LED modules (320) be formed to have an inner diameter corresponding to the outer diameter of the remaining first substrates (311) so as not to overlap with the first substrates (311).

[0053] Meanwhile, the remaining second substrates (321) of the sub-LED modules (320) are also formed to extend annularly around the central part of the corresponding contact plate (410). At this time, it is preferable that the remaining second substrates (321) be formed to have an inner diameter corresponding to the outer diameter of one of the second substrates (321).

[0054] The above-mentioned fourth LED group comprises a plurality of fourth LED chips mounted on the second substrate (321) at a distance from each other along the longitudinal direction. The fourth LED chips are formed to emit light of three different wavelengths.

[0055] Here, the light of the first wavelength range of the fourth LED chip emits two lights with center wavelengths of 280 nm and 380 nm, and the shape of the emission wavelength range of the light of the first wavelength range of the fourth LED chip forms a pointed needle shape centered on the center wavelength range.

[0056] The light of the second wavelength band of the fourth LED chip has a central wavelength band of 730 nm, and 25% to 35% of the total photon quantity of the fourth LED chips is emitted. The shape of the emission wavelength band of the light of the second wavelength band of the fourth LED chip forms a gentle bell-shaped curve centered on the central wavelength band.

[0057] The light of the third wavelength band, which emits the remainder of the total photon quantity of the fourth LED chips, has a central wavelength band of 780 nm, and 45% to 55% of the total photon quantity of the fourth LED chips is emitted.

[0058] The above-mentioned fifth LED group comprises a plurality of fifth LED chips mounted on the second substrate (321) at a distance from each other along the longitudinal direction. The fifth LED chips are formed to emit light of three different wavelength ranges.

[0059] Here, the light of the first wavelength range of the fifth LED chips is a single light with a central wavelength range of 450 nm, which is emitted as 15% to 25% of the total photon quantity of the fifth LED chips. The shape of the emission wavelength range of the light of the first wavelength range of the fifth LED chips forms a gently pointed needle shape centered around the central wavelength range.

[0060] The light of the second wavelength band of the fifth LED chips has a central wavelength band of 660 nm, a wavelength band width of 630 nm to 700 nm, and emits 55% to 65% of the total photon quantity of the fifth LED chips. The shape of the emission wavelength band of the light of the second wavelength band of the fifth LED chips forms a gentle bell-shaped curve centered on the central wavelength band.

[0061] The light of the third wavelength band, which emits the remainder of the total photon quantity of the fifth LED chips, has a central wavelength band of 730 nm. The shape of the emission wavelength band of the light of the third wavelength band of the corresponding fifth LED chips forms a pointed needle shape centered on the central wavelength band.

[0062] Here, the fifth LED chip may be manufactured by pre-doping and solidifying a nitride-based phosphor that emits a central wavelength of 730 nm into a BLU LED chip to enable the output of the corresponding lights, and then post-doping it with a nitride-based phosphor that emits a central wavelength of 660 nm and a final wavelength of up to 700 nm, or it may be composed of single chips without doping.

[0063] The above-mentioned sixth LED group comprises a plurality of sixth LED chips mounted on the second substrate (321) at a distance from each other along the longitudinal direction. The sixth LED chips are formed to emit a tube with a wavelength range of 520 nm to 570 nm.

[0064] Here, it is preferable that the fourth to sixth LED chips be installed alternately and sequentially along the longitudinal centerline of the second substrate (321). At this time, the lighting module composed of the fourth to sixth LED chips constitutes a single unit light, and a plurality of lighting modules may be arranged on the second substrate (321) in a manner that is directly connected to each other. Here, the fourth to sixth LED chips are each directly connected and independently grounded.

[0065] The operator can selectively operate the 6th LED group according to the vegetation condition of the target plant or so that the user can easily distinguish it with the naked eye, so that when the 4th and 5th LED groups are operated, they appear as white light with a Kelvin index of 3000K to 6500K Kelvin.

[0066] The operator can selectively operate the 4th to 6th LED groups respectively, depending on the vegetation condition of the plants to be grown.

[0067] Here, the light irradiation unit (300) may be equipped with a light control module (not shown) that controls one of the main LED modules (310) and one of the sub LED modules (320) to output light of the same wavelength, and controls the remaining of the main LED modules (310) and the remaining of the sub LED modules (320) to output light of the same wavelength.

[0068] Although not shown in the drawing, the power supply unit (500) is connected to an external power source and supplies power to the main LED module (310) and the sub LED module (320). The power supply unit (500) is not limited to this, but any power supply means capable of providing power supplied from the external power source to the main LED module (310) and the sub LED module (320) may be applied.

[0069] The switch unit (600) is equipped with a plurality of bimetal switches (610) connected to sub-LED modules (320) and a power supply unit (500). Although not shown in the drawing, the bimetal switch (610) is configured to have a first connection terminal connected to the power supply unit (500), a second connection terminal connected to the sub-LED module (320), and a bimetal member positioned adjacent to the light irradiation unit (300). One end of the bimetal switch is connected to the first connection terminal and the other end is in contact with the second connection terminal so as to transmit power supplied from the power supply unit (500) to the second connection terminal. When the temperature of the light irradiation unit (300) is above the set temperature, the bimetal switch is configured such that the other end is deformed by the heat of the light irradiation unit (300) and separated from the second connection terminal.

[0070] The first and second connection terminals are not shown in the drawing but are installed within the installation space (202) of the main body (200). The first and second connection terminals are electrically connected to each sub-LED module (320) and power supply unit (500).

[0071] The bimetal component has excellent electrical conductivity and is formed by joining multiple metal plates having mutually different coefficients of thermal expansion. Since the bimetal component is formed from a conventionally used bimetal material so that it can deform according to ambient temperature, a detailed description is omitted. The bimetal component is made of a metal plate of a material that can deform when the temperature is above a set temperature. Here, the set temperature is applied as a temperature lower than the temperature at which the LED chip of the light irradiation unit (300) may develop defects due to heat. Meanwhile, the bimetal component is not limited to this and may be installed such that one end is fixed to the second connection terminal and the other end is detachably in contact with the first connection terminal.

[0072] If a failure occurs in the cooling module (420) formed by stacking multiple thermoelectric elements (421), the light irradiation unit (300) cannot be cooled, and the temperature inside the installation space (202) of the main body (200) increases. At this time, if the temperature inside the installation space (202) exceeds the set temperature, the bimetal member deforms, causing the other end of the bimetal member to be separated from the second connection terminal, and the power supply to the sub-LED module (320) is cut off, thereby stopping the operation of the sub-LED module (320). Since the cessation of operation of the sub-LED module (320) prevents the temperature of the light irradiation unit (300) from rising rapidly, the main LED module (310) can operate for a relatively long time.

[0073] That is, even if the light irradiation unit (300) exceeds the set temperature, the entire light irradiation unit (300) does not stop, but some of the LEDs of the light irradiation unit (300), namely the main LED module (310), can operate. Therefore, if the temperature of the light irradiation unit rises due to a defect in the cooling device, the operation of some of the LEDs of the light irradiation unit (300) can be stopped to reduce heat generation, which has the advantage of providing stable lighting for a relatively long time until the repair work is completed.

[0074] Meanwhile, FIG. 4 shows a light irradiation unit (300) according to another embodiment of the present invention.

[0075] Elements that perform the same function as those in the previously illustrated drawings are indicated by the same reference numeral.

[0076] Referring to the drawing, the light irradiation unit (300) is equipped with one main LED module (310) and a plurality of sub LED modules (320). Here, the switch unit (600) is provided with a plurality of bimetal switches (610) installed in each sub LED module (320) to control the power supply to each sub LED module (320).

[0077] At this time, the switch unit (600) cuts off the power supply to one of the sub-LED modules (320) when the light irradiation unit (300) is above the set temperature, and sequentially cuts off the power supply to the remaining sub-LED modules (320) whenever the temperature of the light irradiation unit (300) increases by a predetermined amount while the temperature is above the set temperature.

[0078] That is, it is preferable that one of the bimetal components of the bimetal switches (610) is formed so that its shape is deformed when the temperature is above the set temperature, and that the remaining bimetal components of the bimetal switches (610) are formed such that the temperature at which their shape is deformed is above the set temperature but is mutually different. Since the deformed temperatures of the bimetal components of the respective bimetal switches (610) are each different, the sub-LED modules (320) can be stopped sequentially as the temperature of the light irradiation unit (300) increases.

[0079] Meanwhile, as illustrated in FIG. 5, the light irradiation unit (300) may have a first substrate (311) of the main LED module (310) and a second substrate (321) of the sub LED module (320) arranged in a spiral. That is, the first substrate (311) and the second substrate (321) are arranged sequentially along a virtual trajectory that extends spirally around the center of the contact plate (410). At this time, it is preferable that the first substrate (311) and the second substrate (321) extend in a curved manner along the spiral trajectory. As described above, since the substrates of the light irradiation unit (300) are formed in a spiral shape, the light generated from the main LED module (310) and the sub LED module (320) can be irradiated more uniformly onto the object to be illuminated.

[0080] Meanwhile, FIG. 6 illustrates a COB type lighting lamp (700) capable of flowering and fruit setting of crops according to another embodiment of the present invention.

[0081] Referring to the drawing, the COB type lighting lamp is further equipped with a cover member (710) that is rotatably installed and a restraining unit (720) that can restrain the cover member (710) in close contact with the main body (200).

[0082] The above cover member (710) is rotatably installed at one end on the lower edge of the main body (200) to open and close the open lower part of the installation space (202), and a coupling projection (711) is formed at the other end so as to be caught on a restraining unit (720).

[0083] The above restraint unit (720) further comprises a catch member (721) rotatably installed on the outer surface of the main body (200) opposite to the other end of the cover member (710) so as to be caught on the coupling projection (711), a rotating member (722) that rotates the catch member (721), a temperature measuring sensor (not shown) that measures the temperature of the light irradiation unit (300), and a restraint control module (not shown) that controls the rotating member (722) so that the installation space (202) is opened when the temperature of the light irradiation unit (300) is above a preset temperature based on the measurement information provided by the temperature measuring sensor.

[0084] The above-mentioned locking member (721) extends in the vertical direction, and its upper portion is rotatably installed on the outer surface of the main body (200). Additionally, the locking member (721) has a locking projection (723) formed at its lower portion, protruding toward the center of the installation space (202) so as to be caught on the coupling projection (711) of the cover member (710).

[0085] The rotating member (722) is installed on the rotation axis of the locking member (721) to rotate the locking member (721). The rotating member (722) is equipped with an electric motor that generates rotational force by electricity. Although not shown in the drawing, the temperature measuring sensor is installed in the installation space (202) of the main body (200) adjacent to the light irradiation unit (300) to measure the temperature within the installation space (202). Since the temperature measuring sensor utilizes a temperature measuring means commonly used in the past to measure ambient temperature, a detailed description is omitted.

[0086] The restraint control module controls the rotation member (722) so that the lower end of the locking member (721) is in close contact with the other end of the cover member (710), so that the other end of the cover member (710) is in close contact with the main body (200) to close the installation space (202), and so that the locking projection (723) is caught on the coupling projection (711) of the cover member (710). Meanwhile, if the temperature of the light irradiation unit is above the set temperature, the restraint control module releases the restraint state on the other end of the cover member (710) so that the cover member (710) rotates to open the installation space (202) so that outside air circulates toward the light irradiation unit (300). That is, the restraint control module operates the rotation member (722) so that the lower end of the locking member (721) rotates away from the cover member (710). By rotating the locking member (721), the locking projection (723) is separated from the coupling projection (711), and the cover member (710) rotates downward due to its own weight, thereby opening the installation space (202) of the main body (200). External air circulates to the light irradiation unit (300) through the lower part of the opened installation space (202), and the light irradiation unit (300) is heat-radiated.

[0087] As described above, the COB type lighting lamp (700) capable of flowering and fruit setting of the crop of the present invention can prevent the light irradiation unit (300) from overheating by opening the installation space (202) when the light irradiation unit (300) heats up above a set temperature.

[0088] Meanwhile, FIG. 7 illustrates a COB type lighting lamp (800) capable of flowering and fruit setting of crops according to another embodiment of the present invention.

[0089] Referring to the drawing, the COB type lighting lamp (800) capable of flowering and fruit setting of the crop is further provided with an auxiliary circulation unit (810) in which a cover member (710) is rotatably installed and the other end of the cover member (710) is brought into close contact with the main body (200) so that the installation space (202) is closed, and the other end of the cover member (710) is rotated so that it is spaced apart from the main body (200) so that the installation space (202) is opened when the temperature of the light irradiation unit is above the set temperature.

[0090] The above cover member (710) is rotatably installed at one end on the lower edge of the main body (200) to open and close the open lower part of the installation space (202).

[0091] The auxiliary circulation unit (810) is equipped with a driving module (811) installed on the rotation axis of the cover member (710) to rotate the cover member (710), a temperature sensor (not shown) for measuring the temperature of the light irradiation unit (300), and a circulation control module (not shown) that controls the driving module (811) to open the installation space (202) when the temperature of the light irradiation unit (300) is above a preset temperature based on the measurement information provided by the temperature sensor.

[0092] The drive module (811) is installed on the pivot axis of the cover member (710), and an electric motor that generates rotational force by electricity is applied. Although not shown in the drawing, the temperature sensor is installed in the installation space (202) of the main body (200) adjacent to the light irradiation unit (300) to measure the temperature within the installation space (202). Since the temperature sensor uses a temperature measuring means generally used in the past to measure ambient temperature, a detailed description is omitted.

[0093] The circulation control module controls the driving module (811) so that the other end of the cover member (710) is in close contact with the main body (200) to close the installation space (202). Meanwhile, if the temperature of the light irradiation unit is above the set temperature, the circulation control module controls the driving module (811) so that the other end of the cover member (710) is rotated downward from the main body (200) to open the installation space (202) so that outside air circulates toward the light irradiation unit (300).

[0094] At this time, the circulation control module operates the driving module (811) to reciprocate the cover member (710) within a certain angle range in a direction adjacent to or away from the main body (200) so that outside air can be forcibly circulated to the corresponding light irradiation unit (300). By the reciprocating cover member (710), some of the outside air is forcibly flowed into the installation space (202), thereby improving the heat dissipation efficiency of the light irradiation unit (300).

[0095] Additionally, although not shown in the drawing, the cover member (710) has a reflective pad attached to it to reflect light generated from the light irradiation unit (300). The reflective pad is attached to the inner edge of the cover member (710) facing the light irradiation unit (300) to reflect light. When the light irradiation unit (300) heats up above a set temperature and the cover member (710) reciprocates, the reflective pad rotates together with the cover member (710) and reflects the light from the light irradiation unit (300) in various directions. Due to the light reflected by the reflective pad, the operator can easily identify the lighting lamp to be repaired, allowing for faster repair work.

[0096] The description of the presented embodiments is provided to enable any person skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not limited to the embodiments presented herein, but should be interpreted in the broadest possible scope consistent with the principles and novel features presented herein.

Claims

1. Main body; A light irradiation unit provided with a main LED module installed in the main body to generate light of a predetermined wavelength range, and at least one sub LED module installed in the main body at a position adjacent to the main LED module to generate light of a predetermined wavelength range; An LED cooling unit installed in the main body to cool the light irradiation unit; A power supply unit that supplies power to the light irradiation unit above; A switch unit installed in the main body above for controlling the power supplied from the power supply unit to the sub-LED module, wherein the power supplied to the sub-LED module is cut off when the light irradiation unit is above a preset temperature; and The above LED cooling unit comprises a plurality of thermoelectric elements whose upper and lower surfaces are respectively cooled and heated by electricity applied from the power supply unit, and the thermoelectric elements are sequentially stacked along the vertical direction, wherein the cooling lower surface is arranged to contact the heating upper surface of an adjacent thermoelectric element below; and The above light irradiation unit is installed at the bottom of the lowest thermoelectric element among the above thermoelectric elements, COB type lighting lamp capable of flowering and fruit setting of crops.

2. In Paragraph 1, The above switch part A first connection terminal connected to the above power supply unit; A second connection terminal connected to the above sub-LED module; and A bimetal member disposed adjacent to the light irradiation unit, wherein one end is connected to either of the first and second connection terminals and the other end is in contact with the other of the first and second connection terminals so as to transmit power supplied from the power supply unit to the second connection terminal, and wherein, when the temperature of the light irradiation unit is above the set temperature, the other end is deformed by the heat of the light irradiation unit and separated from the other of the first and second connection terminals; COB type lighting lamp capable of flowering and fruit setting of crops.

3. In Paragraph 1, The above LED cooling unit A heat dissipation fin installed on the upper surface of the uppermost thermoelectric element among the above thermoelectric elements to dissipate heat from the upper surface of the said thermoelectric element; and A circulation fan installed on the heat dissipation fin to forcibly circulate air to the heat dissipation fin; further comprising COB type lighting lamp capable of flowering and fruit setting of crops.

4. In Paragraph 1, The above sub-LED module is provided in multiple numbers, and The above switch unit cuts off the power supply to any one of the sub-LED modules when the light irradiation unit is above the set temperature, and sequentially cuts off the power supply to the remaining sub-LED modules whenever the temperature of the light irradiation unit increases by a predetermined amount while the temperature is above the set temperature. COB type lighting lamp capable of flowering and fruit setting of crops.

5. In Paragraph 2 or 3, The above main body is provided with an installation space on its lower surface that is retracted upward so that the light irradiation unit can be installed, and A cover member formed of a light-transmitting material, having one end rotatably installed at the lower part of the main body to open and close the open lower part of the above installation space; and A restraining unit further comprising: a restraining unit that restrains the other end of the cover member in close contact with the main body so that the installation space is closed, and releases the restraining state of the other end of the cover member so that the installation space is opened when the temperature of the light irradiation unit is above the set temperature, thereby allowing the cover member to rotate so that the outside air circulates toward the light irradiation unit. COB type lighting lamp capable of flowering and fruit setting of crops.

6. In Paragraph 2 or 3, The above main body is provided with an installation space on its lower surface that is retracted upward so that the light irradiation unit can be installed, and A cover member formed of a light-transmitting material, having one end rotatably installed on the lower part of the main body to open and close the open lower part of the above installation space; and The other end of the cover member is pressed against the main body so that the installation space is closed, and the cover member is rotated so that the other end of the cover member is separated from the main body so that the installation space is opened when the temperature of the light irradiation unit is above the set temperature, and the cover member is reciprocated within a certain angle range in a direction adjacent to or away from the main body so that external air can be forcibly circulated to the light irradiation unit; the auxiliary circulation unit is provided. COB type lighting lamp capable of flowering and fruit setting of crops.

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