Lamp

Abstract

The present disclosure provides a luminaire comprising: a first element forming a first compartment accommodating at least one light source; and a second element suspending the first element, where the second element forms a second compartment. The first element and the second element are rotatably attached to each other allowing the first element to rotate relative to the second element. An enclosed space extends through the first compartment and the second compartment. A fan is disposed in the enclosed space to move air between the first compartment and the second compartment.

Description

Technical Field

[0001] The present disclosure relates to a luminaire comprising a first element forming a first compartment and a second element forming a second compartment, wherein a common enclosed space extends through the first compartment and the second compartment. The present disclosure relates particularly to ventilation of common spaces. Background Art

[0002] In entertainment and architectural lighting, luminaires such as moving head luminaires are often used outdoors, where there is a risk of rain showers. Therefore, the products should either be safely placed under a roof or should be protected with an IP (Ingress Protection) rating of 44 or higher. In addition, drafts should be avoided to reduce the risk of moisture and dust entering the luminaire, which could damage the light source and other components inside the luminaire.

[0003] It is an object of embodiments of the present disclosure to provide an improved lighting fixture. Summary of the invention

[0004] The present disclosure provides a lamp, comprising:

[0005] - a first element forming a first compartment housing at least one light source, and

[0006] - a second element which suspends said first element, said second element forming a second compartment,

[0007] The first element and the second element are rotatably attached to each other so as to allow the first element to rotate relative to the second element,

[0008] wherein the enclosed space extends through the first compartment and the second compartment, and

[0009] A fan is arranged in the enclosed space to move air between the first compartment and the second compartment.

[0010] The luminaire may for example be a moving head luminaire, which typically comprises a head comprising a plurality of light sources arranged to generate a light beam and a plurality of light effect elements, with which various light effects can be generated. Typically, the head is rotatably connected to a yoke, and the yoke is rotatably connected to the base. Typically, a moving head luminaire allows an angular position of the yoke relative to the base between 0 and 540°, which means that the yoke can be rotated 1.5 turns relative to the base. Similarly, the head can be moved within a theoretical angle of 0 to 270° relative to the yoke. However, the exact figures depend on the type of luminaire used, and the allowed angles may be larger or smaller than the angles indicated above.

[0011] However, it should be understood that the luminaire may alternatively be another luminaire comprising at least one light source.

[0012] In an embodiment, wherein the light fixture is a moving head light fixture, the first element may be a head movably attached to a yoke. Thus, the second element may be a yoke.

[0013] The first element forms a first compartment housing at least one light source. The first element may also include, for example, a beam shaping (framing) system for shaping the light beam, a motor, and an external fan arranged to cool the first compartment. The external fan may cool the first compartment by causing ambient air to flow along a portion of the first element, rather than blowing ambient air into the first compartment.

[0014] A second element suspending the first element forms a second compartment.

[0015] The first element and the second element are rotatably attached to each other, thereby allowing the first element to rotate relative to the second element.

[0016] The enclosed space extends through the first compartment and the second compartment. In one embodiment, the enclosed space can be a part of the first compartment and the second compartment. In an alternative embodiment, the enclosed space is formed by the first compartment and the second compartment. Therefore, the outer boundary of the enclosed space can be the outer wall of the first compartment and the second compartment. Therefore, at least one light source can be arranged in the enclosed space. For other elements, such as the beam shaping system and the motor, the situation may also be the same.

[0017] A fan is arranged in the enclosed space to move air between the first compartment and the second compartment. Since at least one light source that generates heat when turned on is arranged in the first compartment, the temperature in the first compartment may be higher, such as much higher than the temperature in the second compartment. By arranging the fan to move air between the first compartment and the second compartment, cooling of the first compartment may be provided. The surface in the second compartment further increases the total surface available for absorbing heat, thereby increasing the overall cooling capacity. Since the air in the enclosed space can provide cooling, the risk of moisture and dust ingress can be avoided or at least greatly reduced.

[0018] The air flow in the closed space can further eliminate condensation (if any). Since the closed space may not be completely closed, i.e., since there may be one or more smaller openings in the first element and / or the second element, such as in a wall portion and / or in a joint between the first compartment and the second compartment, the ingress of moist air may not be completely avoided. Such moist air may cause condensation. However, by the air flow between the first compartment and the second compartment, condensation inside the closed space can be avoided, so that mold inside the closed space can be further avoided.

[0019] To facilitate air flow in the closed space, the first compartment may include a first inlet and a first outlet, and the second compartment may include a second inlet and a second outlet. The first inlet may be arranged to be in fluid communication with the second outlet, and the second inlet may be arranged to be in fluid communication with the first outlet, thereby forming the closed space.

[0020] In order to allow the first element to rotate relative to the second element, the first element can be suspended at the first support and the second support arranged at the second element. The first element can rotate around the rotation axis extending through the first support and the second support. In one embodiment, the first inlet and the second inlet and the first outlet and the second outlet can be arranged in the first support and the second support. By arranging the inlet and the outlet in the first support and the second support, during the rotation of the first element relative to the second element, air can be moved in the closed space and between the first compartment and the second compartment.

[0021] The first support and the second support may each comprise an outer ring and an inner ring. To facilitate air movement between the first compartment and the second compartment, the first and second inlets and the first and second outlets may be arranged in the inner ring, as this may allow unimpeded air movement during use of the luminaire, e.g. during movement of the first element relative to the second element.

[0022] The fan is arranged in the enclosed space. Thus, the fan can be arranged in the first compartment or in the second compartment. As an example, the fan can be a radial fan or an axial fan, wherein the radial fan moves the air radially by changing the direction of the airflow, while the axial fan moves the air substantially without changing the direction.

[0023] In one embodiment, the fan can be arranged in the second compartment, because the available space in the second compartment is usually larger than that in the first compartment. In addition, the fan itself will generate heat, which can further increase the advantage of arranging the fan in a part of the enclosed space in the second compartment.

[0024] In one embodiment, the fan can be a radial fan. The radial fan can be connected to a duct arranged in the enclosed space. By providing a duct in the enclosed space and connecting the duct to the fan, the direction of the airflow in the enclosed space can be at least partially controlled. It should be understood that the fan in an alternative embodiment can be a radial fan that is not connected to a duct.

[0025] In one embodiment, a radial fan may be disposed in the second compartment. To efficiently move air between the first compartment and the second compartment, the duct may extend from a first end attached to the radial fan to a second free end terminating in the first compartment. It should be understood that in alternative embodiments, a radial fan may be disposed in the first compartment.

[0026] In another alternative embodiment, the fan can be an axial fan. The axial fan can be arranged in the first compartment or in the second compartment. However, it should be understood that the lamp can alternatively include more than one fan, for example, each of the first compartment and the second compartment includes a fan.

[0027] In one embodiment, the second compartment may include two sub-compartments; that is, divided into two separate compartments. The two sub-compartments may be fluidically connected to each other to provide a closed space extending through the first compartment and the second compartment. A fan may be arranged in one of the two sub-compartments, or in an interface between the two sub-compartments, and may be arranged to press air from one sub-compartment to another sub-compartment, so that a positive pressure may be generated in this sub-compartment, and a negative pressure may be generated in another sub-compartment where the fan is arranged. Positive and negative pressures may be balanced by air moving from a sub-compartment with a positive pressure to the first compartment. Similarly, air may also move from the first compartment to a sub-compartment with a negative pressure. Therefore, air may move between the first compartment and the second compartment, thereby cooling the first compartment.

[0028] The fan may be configured to provide a variable air flow. In one embodiment, the lamp may include a controller configured to control the air flow, for example, automatically controlling the air flow based on the time the lamp has been on. Alternatively or additionally, the flow may be controlled based on the number of light sources used.

[0029] The air flow may additionally or alternatively be controlled based on a temperature determined in the first compartment. As an example, the temperature may be determined by measuring the temperature in the first compartment or by estimating the temperature in the first compartment. The estimation of the temperature may be based on time, such as usage time, the number of light sources switched on, a predetermined usage pattern, the temperature of the surrounding environment (estimated or measured), etc. The term "usage pattern" is to be understood as a plan for using at least one light source.

[0030] The fan can be configured to provide 2-20 m 3 Air flow rate in the range of / h, such as 4-17 m 3 / h, such as 6-14m 3 As mentioned above, the air flow rate may be variable and, as an example, may depend on the use of the luminaire, including the use of at least one light source. The range may depend on the size of the luminaire and / or the number of light sources.

[0031] As an example, the lamp having at least one light source may use at least 250 W, such as at least 300 W, such as at least 320 W. The fan may be arranged to keep the temperature in the first compartment below 70 degrees Celsius. Therefore, the air flow rate may be controlled to keep the temperature in the first compartment below 70 degrees Celsius.

[0032] The fan may be controlled by a separate controller configured to control the fan. In alternative embodiments, the fan may be controlled by a controller configured to control movement of the first element relative to the second element, and / or by a controller configured to control at least one light source and / or a beam shaping system that may be used to shape the light beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Embodiments of the present disclosure will now be further described with reference to the accompanying drawings, in which:

[0034] Figure 1 An embodiment of a lamp is shown;

[0035] Figure 2 shows a cross section of an embodiment of a light fixture with a fan in a first compartment;

[0036] Figure 3 shows a cross section of an embodiment of a light fixture with a fan in the second compartment;

[0037] Figure 4 shows a cross section of an embodiment showing a light fixture with a fan in a second compartment, the second compartment comprising two sub-compartments; and

[0038] Figure 5 A cross section of an embodiment of the light fixture with a fan in the third compartment is shown. DETAILED DESCRIPTION

[0039] It should be understood that the detailed description and specific examples, while indicating embodiments of the disclosure, are given by way of illustration only, since various changes and modifications within the spirit and scope of the disclosure will become apparent to those skilled in the art from this detailed description.

[0040] Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 An embodiment of the light fixture 100 is shown in the form of a moving head light fixture. Figures 2 to 5Four different embodiments are shown in cross-sectional views. The lamp 100 comprises a head 101, a yoke 102 and a base 103. Two joints 104 are arranged between the head 101 and the yoke 102 and a second joint 105 is arranged between the base 103 and the yoke 102 so that the head 101 is rotatably connected to the yoke 102 and the yoke 102 is rotatably connected to the base 103.

[0041] The head 101 is hereinafter referred to as the first element 101, and the yoke 102 is hereinafter referred to as the second element 102. The two motors 170A, 170B (see Figures 2 to 5 ) is arranged for movement of the head 101, wherein the motor 170A is used for rotation of the head 101, and the motor 170B is used for tilting the head 101.

[0042] therefore, Figure 1 A luminaire 100 is shown comprising a first element 101 (head) forming a first compartment 110 housing at least one light source 112 (see Figures 2 to 5 The luminaire 100 further comprises a second element 102 (yoke) suspending the first element. The second element 102 forms a second compartment 120 .

[0043] In order to allow the first element 101 to rotate relative to the second element 102, the first element 101 is suspended at first and second supports (bearings) 122A and 122B arranged at the second element 102. Thus, the first element 101 can rotate around a rotation axis passing through the first and second supports 122A and 122B.

[0044] The first compartment 110 and the second compartment 120 form an inner space 130 in which the fan 125 is arranged. A third compartment 140 is formed in the base 103 .

[0045] Figures 2 to 5 Four different embodiments of the luminaire 100 are shown, except Figure 2 The fan 125 in the illustrated embodiment is arranged in the first compartment 110. Figure 3 and Figure 4 The fan 125 in the illustrated embodiment is arranged in the second compartment 120, and Figure 5 The illustrated embodiment is similar except that the fan 125 is disposed in the third compartment 140 .

[0046] In order to facilitate the air flow in the enclosed space 130, the first compartment 101 includes a first inlet 128A and a first outlet 129A, and the second compartment 102 includes a second inlet 128B and a second outlet 129B. The first inlet 128A is arranged to be in fluid communication with the second outlet 129B, and the second inlet 128B is arranged to be in fluid communication with the first outlet 129A, thereby forming the enclosed space 130. It should be understood that, according to the direction of flow, the first inlet 128A and the first outlet 129A can be arranged in reverse. For the second inlet 128B and the second outlet 129B, this may also be the case.

[0047] In the embodiment shown, the first inlet 128A and the second inlet 128B and the first outlet 129A and the second outlet 129B are arranged in the first support 122A and the second support 122B. By arranging the inlet and the outlet in the first support and the second support, air can be moved in the closed space 130 and between the first compartment 110 and the second compartment 120 during the rotation of the first element 101 relative to the second element 102.

[0048] exist Figure 2 In the illustrated embodiment, the fan 125 is arranged in the portion of the enclosed space 130 located in the first compartment 110. The fan 125 is an axial flow fan, which is arranged to blow air from the first compartment 110 to the second compartment 120 via the first outlet 129A and the second inlet 128B. An axial flow fan refers to a fan with a constant inlet and outlet direction. The blades rotate around the axis, and the airflow is parallel to the axis. This movement of air generates a positive pressure in the second compartment 120 and a negative pressure in the first compartment 110, so that the air moves from the second compartment 120 to the first compartment 110 via the second outlet 129B and the first inlet 128A. The movement of air is represented by a dotted arrow.

[0049] exist Figure 3 In the embodiment shown, the fan 125 is arranged in the part of the enclosed space 130 located in the second compartment 120. The fan 125 is a radial fan, which is arranged to blow air from the second compartment 120 to the first compartment 110 via the second inlet 129A and the first outlet 128B. Radial means that air is sucked into the fan via the side air inlet, and the output direction is radial relative to the center of the fan. The duct 135 is connected to the radial fan 125 and terminates at the first support 122A. The movement of air via the duct 135 generates a positive pressure in the first compartment 110 and a negative pressure in the second compartment 120, whereby the air moves from the first compartment 110 to the second compartment 120 via the first inlet 128A and the second outlet 129B. The movement of air is represented by a dotted arrow. Therefore, in this illustration, the usage of the inlet and outlet is opposite.

[0050] exist Figure 4 In the illustrated embodiment, fan 125 is arranged in the part of the second compartment 120 of the enclosed space 130. The second compartment 102 is divided into two sub-compartments 120A, 120B, wherein fan 125 is arranged in the interface between the two sub-compartments 120A, 120B. Fan 125 is arranged to press air from the second sub-compartment 120B to the first sub-compartment 120A, thereby generating positive pressure in the first sub-compartment 120A, and generating negative pressure in the second sub-compartment 120B. Positive pressure and negative pressure are balanced by moving air from the first sub-compartment 120A with positive pressure to the first compartment 110, and moving air from the first compartment 110 to the second sub-compartment 120B with negative pressure. Air moves from the first sub-compartment 120A to the first compartment 110 via the second outlet 129B and the first inlet 128A, and air moves from the first compartment 110 to the second sub-compartment 120B via the first outlet 129A and the second inlet 128B. The movement of air is indicated by dashed arrows.

[0051] In all embodiments, the fan 125 is arranged to move air between the first compartment 110 and the second compartment 120, thereby providing cooling of the first compartment 110. Since the cooling is provided using air from the enclosed space 130, the risk of moisture and dust ingress can be avoided.

[0052] exist Figure 5 In the illustrated embodiment, the fan 125 is arranged in the third compartment 140. The fan 125 is an axial flow fan arranged to draw air from the first compartment 110 via the second compartment 120 to the third compartment 140. An opening 150 is arranged in the first compartment 110 so that when the fan 125 draws air from the first compartment 110 via the second compartment 120 to the third compartment 140, ambient air can be drawn into the first compartment 110.

[0053] The external computer 200 communicates with a controller 180 integrated in the base 103. The controller 180 is arranged to control the lens 114, control the light source 112, control a beam shaping system (not shown) for shaping the light beam, control the movement of the first element / head 101, control the movement of the second element / yoke 102, etc. The controller 180 also controls the fan 125. In addition, a drive board 182 is arranged in the head 101 for controlling the head 101 and the light source 112. The drive board 182 communicates with the controller 180.

[0054] The lens 114 is movably arranged relative to the light source 112. The lens 114 is arranged substantially perpendicular to the at least one light source 112, and the movement relative to the light source 112 is a substantially linear movement in a direction away from the at least one light source 112 and towards the at least one light source 112. A deformable membrane 116 defining a tubular shape is attached to the lens 114 and the first element 101 at opposite ends thereof to seal the first element 101 along the circumference of the lens 114. The lens 114 is moved back and forth in front of the light source 112 using a plurality of motors 121, of which only two motors 121 are visible. In the illustrated embodiment, the motors 121 are linear motors in the form of spindle motors.

[0055] In the illustrated embodiment, the base 103 also includes a user input element 184. As an example, the user input element 184 may include a base, a touch pad, a keyboard, etc. In addition, the base 103 includes a display 186 so that a user can interact with the user input element 184.

Claims

1. A lamp, comprising: - a first element (101) forming a first compartment (110) housing at least one light source, and - a second element (102) which suspends said first element, said second element forming a second compartment (120), The first element and the second element are rotatably attached to each other so as to allow the first element to rotate relative to the second element, wherein the enclosed space extends through the first compartment and the second compartment, and A fan (125) is arranged in the enclosed space to move air between the first compartment and the second compartment.

2. The lamp of claim 1 , wherein the first compartment comprises a first inlet and a first outlet, and the second compartment comprises a second inlet and a second outlet, the first inlet being arranged to be in fluid communication with the second outlet and the second inlet being arranged to be in fluid communication with the first outlet to form the enclosed space.

3. The luminaire according to claim 2, wherein the first element (101) is suspended at a first support and a second support arranged at the second element, thereby allowing the first element to rotate around a rotation axis extending through the first support and the second support, and wherein the first inlet and the second inlet and the first outlet and the second outlet are arranged in the first support and the second support.

4. The lamp of claim 3, wherein each of the first support and the second support comprises an outer ring and an inner ring, and wherein the first inlet and the second inlet and the first outlet and the second outlet are arranged in the inner ring.

5. A luminaire according to any one of the preceding claims, wherein the second compartment comprises two sub-compartments which are in fluid communication with each other.

6. The luminaire according to any of the preceding claims, wherein the fan is a radial fan, and wherein the radial fan is connected to a duct arranged in the enclosed space.

7. The lamp according to any one of claims 1 to 5, wherein the fan is an axial flow fan.

8. A luminaire according to any one of the preceding claims, wherein the fan is configured to provide a variable air flow rate.

9. A luminaire as claimed in claim 8, wherein the air flow rate can be controlled in dependence on a temperature determined in the first compartment.

10. A luminaire according to any one of the preceding claims, wherein the fan is configured to provide 2-20 m 3 Air flow rate in the range of / h, such as 4-17 m 3 / h, such as 6-14 m 3 / h.

Images