JP2009075236A - Cooling device for projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for cooling an optical element by a user-side heat exchanger of an air conditioner in cooling of a liquid crystal panel (optical element) of a projector. <P>SOLUTION: The device includes a projector with an optical element including a plurality of liquid crystal panels to process an outgoing light from a light source according to image information and an air conditioner including a heat source-side unit containing a compressor and a heat source-side heat exchanger and a plurality of use-side heat exchangers connected thereto by a unit-to-unit pipe. A specific use-side heat exchanger of the use-side heat exchangers is branched and connected to a low-pressure gas pipe of the unit-to-unit pipe and further connected to a liquid pipe of the unit-to-unit pipe through a refrigerant decompressor to thereby form a refrigerant circuit. The projector is cooled by the cooling effect of the specific use-side heat exchanger, and a control part controls the projector to a predetermined temperature by controlling the temperature of the specific use-side heat exchanger based on temperature detection of a temperature sensor which detects a cooling temperature of the projector. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector cooling apparatus that processes light emitted from a light source with an optical element and projects a processed projection light image onto a screen with a projection lens.

  Conventionally, this type of projector, for example, a liquid crystal projector, is configured by mounting a light source, a liquid crystal panel (optical element), a projection lens, and the like in a main body. The liquid crystal panel is generally composed of three liquid crystal panels as light valves for processing (modulating) each color light according to video information. Then, after separating the emitted light from the light source into each color light, each liquid crystal panel processes (modulates) it according to the video information, and synthesizes it as a projected light image via a prism or the like. Then, the combined projection light image is enlarged and projected on the screen by the projection lens.

  In such a projector, a light source and an optical element (liquid crystal panel, etc.) are used as a heat source to heat the main body. Therefore, a plurality of fans are installed in the main body, and the air outside the projector (outside air) is provided by each fan. ) Was supplied (blowed) to the optical element and the light source to dissipate heat. In this case, since the light source is as high as + 900 ° C., it can be sufficiently dissipated by the outside air. However, the upper limit of the operating temperature of the optical element is relatively low. For example, a liquid crystal panel is used as the optical element. In this case, the upper limit of the use temperature is a relatively low temperature of several tens of degrees Celsius. Therefore, in the optical element, the heat radiation amount is greatly influenced by the outside air temperature. That is, when the outside air temperature is low, the optical element can sufficiently dissipate heat to the supplied outside air, but when the outside air temperature is high, the heat radiation amount is ensured by increasing the air volume of the fan. There was a need. For this reason, there have been problems such as an increase in noise caused by the operation of the fan and a significant increase in power consumption.

  In addition, the outside air that has received heat is released to the outside, and this released outside air is again sucked in by the fan and supplied to the projector, so that there is a problem that a short cycle of air after heat dissipation occurs. An effective heat dissipation effect could not be obtained.

In order to solve such a problem, there has been proposed one that cools a liquid crystal panel (optical element) by generating low-temperature air by electronic cooling (see, for example, Patent Document 1).
JP-A-2005-121250

  Such electronic cooling can eliminate the problem of noise, but such electronic cooling is inefficient in energy, and the heat generating part of the electronic cooling is integrally formed, so that heat is radiated to the outside in the vicinity of the cooling target. Means (heat sinks and fans) are required, and there is a problem that the design freedom is remarkably lowered due to spatial restrictions.

  The present invention has been made to solve the conventional technical problems, and includes a heat source side unit including a compressor and a heat source side heat exchanger, and a use side heat exchanger for air conditioning such as in a room. The projector's optical elements are efficiently cooled by the cooling action of a specific user-side heat exchanger among the user-side heat exchangers of the air conditioner that connects multiple built-in user-side units with inter-unit piping. Thus, an effective cooling technique for various projectors is provided.

  According to a first aspect of the present invention, there is provided a projector cooling apparatus including a light source, an optical element including a plurality of liquid crystal panels so as to process light emitted from the light source according to video information, and a processed projection light image on a screen or the like. A projector having a projection lens for projecting to a projector, a heat source unit including a compressor and a heat source side heat exchanger, and a plurality of usage side units including a use side heat exchanger between the units. An air conditioner connected by piping, and branchingly connects the heat source side heat exchanger to a refrigerant discharge pipe and a refrigerant suction pipe of the compressor via a switching valve, and the inter-unit pipe is connected to the refrigerant discharge pipe A high-pressure gas pipe that is branched and connected, a low-pressure gas pipe that is branched and connected to the refrigerant suction pipe, and a liquid pipe that is connected to the heat source-side heat exchanger, When connected to a gas pipe, A specific use side heat exchanger for cooling the projector, which is connected to the liquid pipe via a first refrigerant pressure reducer to form a refrigerant circuit, and a switching valve to the high pressure gas pipe and the low pressure gas pipe. A temperature sensor that detects the cooling temperature of the projector, and is connected to the liquid pipe through a second refrigerant pressure reducer and forms a refrigerant circuit by connecting to the liquid pipe. A control unit is provided that controls the projector to a predetermined temperature by temperature control of the specific use side heat exchanger based on the detection.

  According to a second aspect of the present invention, there is provided a projector cooling apparatus comprising: a light source; an optical element including a plurality of liquid crystal panels so as to process light emitted from the light source in accordance with video information; A liquid crystal projector provided with a projection lens for projecting to a projector, a heat source side unit incorporating a compressor and a heat source side heat exchanger, and a plurality of utilization side units incorporating a utilization side heat exchanger An air conditioner connected by an inter-pipe, and the heat source side heat exchanger is branched and connected to a refrigerant discharge pipe and a refrigerant suction pipe of the compressor via a switching valve, while the inter-unit pipe is connected to the refrigerant discharge pipe A high-pressure gas pipe branched and connected, a low-pressure gas pipe branched and connected to the refrigerant suction pipe, and a liquid pipe connected to the heat source side heat exchanger, Branch connection to low pressure gas pipe A specific use side heat exchanger for cooling the liquid crystal projector, which is connected to the liquid pipe via a first refrigerant pressure reducer to form a refrigerant circuit, and a switching valve for the high pressure gas pipe and the low pressure gas pipe A temperature-detecting cooling temperature of the liquid crystal projector, wherein the liquid pipe is connected via a second refrigerant pressure reducer and connected to the liquid pipe via a second refrigerant decompressor to form a refrigerant circuit. A control unit is provided that controls the liquid crystal projector to a predetermined temperature by opening degree adjustment control of the first refrigerant decompressor and / or operation control of the compressor based on temperature detection of the sensor.

  According to a third aspect of the present invention, there is provided a projector cooling apparatus that projects a light source, an optical element including a plurality of liquid crystal panels so as to process light emitted from the light source according to image information, and a processed projection light image on a screen or the like. Connecting a projector comprising a projection lens for the projector, a heat source side unit including a compressor and a heat source side heat exchanger, and a plurality of usage side units including a use side heat exchanger by inter-unit piping The heat source side heat exchanger is branched and connected to the refrigerant discharge pipe and the refrigerant suction pipe of the compressor via a switching valve, and the inter-unit pipe is branched and connected to the refrigerant discharge pipe. A high-pressure gas pipe, a low-pressure gas pipe branched from the refrigerant suction pipe, and a liquid pipe connected to the heat source side heat exchanger, and the use side heat exchanger is connected to the low-pressure gas pipe. Branch connection and the liquid Is connected to the specific use side heat exchanger for cooling the projector, which is connected via a first refrigerant pressure reducer to form a refrigerant circuit, and to the high pressure gas pipe and the low pressure gas pipe via a switching valve. And an air-conditioning use-side heat exchanger connected to the liquid pipe via a second refrigerant pressure reducer to form a refrigerant circuit, and the specific use-side heat exchanger includes refrigerant and water in the refrigerant circuit. Is a water heat exchanger for exchanging heat, and the projector-side cooling heat exchanger provided in the projector so that the chilled water cooled by the water heat exchanger is circulated by a pump, and the projector-side cooling heat A cooling air circulation blower is provided for supplying cold air cooled by the exchanger to the periphery of the optical element through a duct, and an air temperature returning to the projector-side cooling heat exchanger or a cold water temperature on the outlet side of the heat exchanger is set. Detect An opening degree adjustment control of the first refrigerant pressure reducer so as to maintain the air temperature on the air suction side of the projector-side cooling heat exchanger at a predetermined temperature based on the temperature detection of the temperature sensor; A control unit is provided which is controlled by any one or a combination of operation control of the compressor, discharge flow rate control of the pump, and rotation speed control of the fan for circulating cold air.

  According to a fourth aspect of the present invention, there is provided a projector cooling device according to the third aspect, wherein the light source emits red (R), green (G), and blue (B) color lights, which are the three primary colors of light. , A green (G) laser light source, and a blue (B) laser light source, these laser light sources are arranged to face the prism, and the liquid crystal panels are respectively arranged to face the red (R) laser light source. A green (G) liquid crystal panel disposed opposite to the green (G) laser light source, a blue (B) liquid crystal panel disposed opposite to the blue (B) laser light source, and the duct serving as the projector-side heat exchanger In this case, the cool air circulated fan is divided into the respective liquid crystal panels, and the cool air circulation blower is constituted by a blower for each of the divert ducts.

  The projector cooling device according to a fifth aspect of the present invention is the projector according to any one of the first to fourth aspects, wherein the specific usage-side heat exchanger is a water heat exchanger in which heat is exchanged between the refrigerant in the refrigerant circuit and water. A projector-side cooling heat exchanger provided in the liquid crystal projector so that the chilled water cooled by the water heat exchanger is circulated by a pump, and the cool air cooled by the projector-side cooling heat exchanger around the optical element A cool air circulation blower that is supplied through a duct to the water heat exchanger side, the projector side cold water inlet passage, the water heat exchanger side cold water return passage, and the projector side cold water. A detachable connector portion for connecting an electric circuit connected to the control portion is provided integrally with a detachable connector to the outlet passage.

  The projector cooling device according to a sixth aspect of the present invention is the projector according to any one of the first to fifth aspects, wherein the projector-side signal and the air-conditioner-side signal connected to the control unit are the projector-side power line and the projector-side power line. It is transmitted and received through a power line on the air conditioner side.

  In the first aspect of the invention, among the plurality of usage-side units of the room air conditioner, a specific usage-side heat exchanger is used for cooling the projector, so that the projector cooling refrigeration device and the cooling device are specially installed. There is no need to connect pipes. Based on the temperature detection of the temperature sensor that detects the cooling temperature of the projector by the operation of the control unit, the temperature of the specific use side heat exchanger can be controlled to control the projector to a predetermined temperature, and the temperature of the optical element Can always be kept constant. For this reason, it is also effective for a large projector.

  In the second aspect of the invention, a specific use-side heat exchanger is used for cooling the projector among the plurality of use-side units of the room air conditioner, so that the projector cooling refrigeration apparatus and the cooling apparatus are specially used. There is no need to install and connect pipes. This specific use-side heat exchanger is a water heat exchanger, and by cooling the projector with cold water cooled by this water heat exchanger, the optical element can be cooled to an appropriate temperature, and the temperature of the optical element is always constant. It will be something that can be kept. For this reason, it is also effective for a large projector.

  In the third aspect of the invention, since a specific use side heat exchanger is used for cooling the projector among the plurality of use side units of the room air conditioner, the projector cooling refrigeration apparatus and the cooling apparatus are specially used. There is no need to install and connect pipes. The specific use side heat exchanger is a water heat exchanger, and the cool air cooled by the water heat exchanger is circulated by a cool air circulation blower, so that the projector can be cooled. Based on the temperature detection of the temperature sensor that detects the cooling temperature, the temperature control of the water heat exchanger, the pump discharge flow rate control, the cooling air circulation control by the opening adjustment control of the first refrigerant decompressor and / or the operation control of the compressor The projector can be controlled to a predetermined temperature by any one or a combination of the rotation speed control of the blower, and the temperature of the optical element can be always kept constant. For this reason, it is also effective for a large projector.

  In the fourth invention, in addition to the effects of the third invention, the light source is a red (R), green (G), and blue (B) laser light source that emits light of three primary colors, and the optical element is When each of these is disposed opposite to these laser light sources, when the cool air cooled by the heat exchanger is circulated around the optical element through the duct by the blower, the case where the single air blower common to each liquid crystal panel is used In contrast to this, this duct has a diversion duct configuration for diverting the cold air cooled by the heat exchanger to each of these liquid crystal panels, and a fan is provided for each diversion duct, thereby circulating the cold air to each liquid crystal panel. By controlling the air flow rate of the blower according to the cool air temperature passing through the corresponding liquid crystal panel, it becomes easy to control each liquid crystal panel to be cooled to a predetermined temperature.

  In the fifth aspect of the invention, in addition to the effects of the first to fourth aspects of the invention, a water pipe for supplying cold water to the projector is detachable with a connector, and the electric circuit is connected to the control unit integrally with the water pipe connector. By providing a detachable connector part for connection, it is easy to attach and detach the water pipe and electric wiring, it is easy to move and install the projector to each room, and the projector can be attached and detached for repair, inspection, etc. Easy to pick.

  In the sixth aspect of the invention, in addition to the effects of the first to fifth aspects of the invention, the projector-side signal and the air-conditioner-side signal connected to the control unit pass through the projector-side power line and the air-conditioner-side power line. Since signals are transmitted and received, the wiring of the signal line to the control unit can be omitted, the projector can be easily moved and installed in each room, and the projector can be easily attached and detached for repairs, inspections, and the like.

  The projector cooling device of the present invention projects a light source, an optical element including a plurality of liquid crystal panels so as to process light emitted from the light source according to image information, and a processed projection light image on a screen or the like. A projector comprising a projection lens, a heat source unit including a compressor and a heat source side heat exchanger, and a plurality of use side units including a use side heat exchanger connected by piping between the units. An air conditioner is provided, and the heat source side heat exchanger is branched and connected to a refrigerant discharge pipe and a refrigerant suction pipe of the compressor via a switching valve, and the inter-unit pipe is branched and connected to the refrigerant discharge pipe A high-pressure gas pipe, a low-pressure gas pipe branched and connected to the refrigerant suction pipe, and a liquid pipe connected to the heat source side heat exchanger, the usage-side heat exchanger branched to the low-pressure gas pipe Connect and liquid tube Is connected via a switching valve to the specific use side heat exchanger for cooling the projector, which is connected through a first refrigerant pressure reducer to form a refrigerant circuit, and to the high pressure gas pipe and the low pressure gas pipe. And an air-conditioning use-side heat exchanger connected to the liquid pipe via a second refrigerant pressure reducer to form a refrigerant circuit, and based on temperature detection of a temperature sensor that detects the cooling temperature of the projector, A control unit for controlling the projector to a predetermined temperature by controlling the temperature of the specific use side heat exchanger is provided, and an embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a refrigerant circuit configuration diagram of an air conditioning system (air conditioning apparatus) including a projector cooling device according to the present invention, and FIG. 2 is an air conditioning system (air conditioning device) including a projector cooling device according to the present invention. FIG. 3 is a schematic perspective view showing the inside of the projector in a state where the projector cooling device according to the present invention is omitted, and FIG. 4 is a state equipped with the projector cooling device according to the present invention. 5 is a schematic perspective view showing the inside of the liquid crystal projector, FIG. 5 is a plan view showing the internal outline of the projector in a state equipped with the projector cooling device according to the present invention, and FIG. 6 is a cold air circulation path along the AA section of FIG. FIG. 7 is a configuration diagram of a cold water circulation path and a cold air circulation path according to the projector cooling apparatus of the present invention, and FIG. 8 is a diagram for each room in which the projector according to the present invention is installed. FIG. 9 is a configuration diagram of a cold water primary-side connector and a projector-side secondary connector in a room where the projector according to the present invention is installed, and FIG. 11 is a diagram illustrating the projector according to the present invention. FIG. 12 is an explanatory diagram of a configuration in which an electric circuit connecting connector portion SL is provided on a cold water primary side connector and a projector side secondary side connector in an installation room, and FIG. 12 is an air conditioning system provided with a projector cooling device according to the present invention. It is a refrigerant circuit and water pipe block diagram of (air conditioning apparatus).
It is.

  First, one embodiment will be described with reference to FIGS. The projector according to the embodiment includes a light source 2, a uniform illumination optical system 3, a color separation optical system (not shown), an optical element 4, a projection lens 9, and a cooling device for the optical element 4 inside a main body 1. 10 is a liquid crystal projector P. The main body 1 is a flat box made of a material excellent in heat dissipation (for example, magnesium). 3 to 5 are views for explaining the internal arrangement of the main body 1. The light source 2 includes a lamp 20 such as an ultra-high pressure mercury lamp and a reflector 21 for emitting light (diverged light) emitted from the lamp forward (FIG. 3). The light source 2 of the embodiment is formed by attaching reflectors 21 to a plurality of (four) lamps 20... And is accommodated in a lamp box 22 provided in the main body 1.

  The uniform illumination optical system 3 converts the light emitted from the light source 2 into a parallel light flux having a uniform luminance distribution, and is composed of an integrator lens, a condenser lens, a total reflection mirror, and the like. The color separation optical system separates the parallel light flux from the uniform illumination optical system 3 into color lights of each color R, G, and B, and separates the parallel light velocity from the uniform illumination optical system 3 into each color. And a prism for guiding the separated color light beams to the optical element 4.

  The optical element 4 includes three liquid crystal panels (LCD panels) 5, 6, and 7 that transmit light, and a polarizing plate 8 </ b> A that is provided on the incident side of each of the liquid crystal panels 5, 6, and 7 with a gap therebetween, Each of the liquid crystal panels 5, 6, and 7 is composed of a polarizing plate 8 </ b> B provided on the emission side with a space, a prism 25 and the like. The liquid crystal panels 5, 6, and 7 process (modulate) the light, which is separated by the color separation optical system and guided to the liquid crystal panels 5, 6, and 7, according to video information. The prism 25 combines light of each color to form a projected light image. The prism 25 includes a reflection surface made of an X-shaped dielectric multilayer film, and light from each of the liquid crystal panels 5, 6, and 7 is converted into a single light flux through the reflection surface. The projection lens 9 enlarges and projects the projection light image from the prism 25 onto the screen SK, and is detachably disposed in a hole (not shown) formed in the wall surface of the main body 1. 3 to 5, reference numeral 27 denotes a box that covers an optical path for guiding the emitted light from the light source 2 to the liquid crystal panels 5, 6, 7 and the polarizing plates 8 </ b> A, 8 </ b> B. That is, a path (optical path) through which light passes from the light source 2 to the polarizing plate 8A on the incident side of each of the liquid crystal panels 5, 6, and 7 is formed in the box 27.

  The operation of the above configuration will be described. The light emitted from the light source 2 is converted into a parallel light velocity having a uniform luminance distribution through the uniform illumination optical system 3 as indicated by a dotted arrow in FIG. The light is separated into R, G, and B light and guided to the liquid crystal panels 5, 6, and 7 that function as the corresponding light valves via the incident-side polarizing plate 8 </ b> A. The light beams guided to the liquid crystal panels 5, 6, and 7 are modulated there in accordance with the image information, converted into a projection image of a single light beam by the prism 25 through the polarizing plate 8 B on the exit side, and then projected by the projection lens 9. The image is projected on the screen.

  By the way, in the conventional liquid crystal projector, since the light source and each liquid crystal panel become a heat source and the inside of the main body is heated, a plurality of fans are installed in the main body, and each fan supplies air outside the main body to the liquid crystal panel and the light source. It was supplied to the heat dissipation. Specifically, an example will be described, after supplying air from the outside to the liquid crystal panel to dissipate heat, the air that has passed through the liquid crystal panel is supplied to the light source to dissipate the light source. Thereafter, the air heated by the light source was discharged to the outside of the main body by the fan.

  Since the light source is as high as + 900 ° C., it is possible to sufficiently dissipate heat by supplying air after passing through the liquid crystal panel. On the other hand, the upper limit of the use temperature of the liquid crystal panel is a relatively low temperature of several tens of degrees Celsius, and it is necessary to cool the liquid crystal panel so as to be lower than the upper limit temperature. For this reason, the heat radiation amount of the liquid crystal panel is greatly influenced by the outside air temperature (the ambient temperature of the projector). That is, when the outside air temperature is low, the temperature of the outside air supplied to the liquid crystal panel is low, so that the outside air can sufficiently dissipate heat. However, when the outside air temperature is high, the temperature of the liquid crystal panel can be maintained below the upper limit of the operating temperature unless a large amount of outside air is supplied to the liquid crystal panel by increasing the airflow of the fan. It will disappear. As a result, noise increases due to the operation of the fan, and power consumption due to the operation of the fan increases significantly.

  Furthermore, although the outside air that has received heat in the main body is released to the outside, there is a problem that a short cycle of air after heat dissipation occurs, in which the released outside air is sucked again by the fan. In this case, since the outside air sucked in by the fan is a high temperature heated by exchanging heat with the light source, there is a possibility that the temperature of the liquid crystal panel rises when such a short cycle occurs, and an effective heat dissipation effect is obtained. I could not.

  The temperature rises depending on the degree of heat generation of the liquid crystal panels 5, 6, 7 and the respective polarizing plates 8A, 8B and the prism 25. In particular, if the temperature of the liquid crystal panels 5, 6, 7 becomes higher than a predetermined temperature, the performance deteriorates This is not preferable. Therefore, the liquid crystal projector P of the present invention includes the cooling unit 10 in the main body 1.

  That is, in the main body 1 of the liquid crystal projector P of the present invention, a projector-side cooling heat exchanger 10A and a cool air circulation fan 10B are installed as a cooling device 10 (cooling unit 10). A cooling function unit PC of the liquid crystal projector P is provided in a part of the air conditioning system (air conditioning apparatus) AC of each room in the house (inside the building), and the liquid crystal projector P is cooled by the cooling function unit PC. One of them is a configuration in which cold water produced by the cooling function unit PC is circulated to the heat exchanger 10A. The liquid crystal panels 5, 6, 7, the polarizing plates 8A, 8B, the prism 25, and the like are cooled by cool air obtained by heat exchange with the heat exchanger 10A. In order to exhaust the high-temperature air in the main body 1 by the lamp 20, the main body 1 is divided into the main body 1 lamp 20 side and the optical element 4 side by a partition plate 30 extending over the left and right side walls 1A, 1B, and an air suction port. The outside air sucked from 35 can be exhausted by the blower 40 provided at the discharge port 37.

  A duct 50 is provided around the liquid crystal panels 5, 6 and 7, the polarizing plates 8A and 8B and the prism 25, and the cool air exchanged with the heat exchanger 10 </ b> A is passed through the duct 50 by the cooler circulation fan 10 </ b> B. , Liquid crystal panels 5, 6, 7, polarizing plates 8 A, 8 B and prism 25. That is, in the liquid crystal projector P of the present embodiment, the liquid crystal panels 5, 6, 7, the polarizing plates 8 </ b> A, 8 </ b> B, and the prism 25 are arranged in the cooling air passage constituted by the duct 50, and are circulated through the duct 50. It cools locally with cold air.

  The duct 50 of the present embodiment is composed of a heat insulating material. As the heat insulating material, the thermal conductivity of hard vinyl chloride, silicon resin, fluororesin, phenol resin, polycarbonate resin, polystyrene resin, etc. is about 0.1 W / (m · K) to 0.3 W / (m · K). Rubber / plastic materials, or glass materials with a thermal conductivity of about 1 W / (m · K) to 4 W / (m · K), such as quartz glass or glass ceramic, or glass wool, rock wool, carbonized cork, etc. Can be used, such as a fiber-based heat insulating material having a thermal conductivity of 0.0045 W / (m · K) or less, a polystyrene foam, a building heat insulating material, a vacuum heat insulating material, or the like. In addition, it is also possible to use a material having a thermal conductivity of 1 W / (m · K) or less as the heat insulating material.

  The duct 50 is formed around the liquid crystal panels 5, 6, 7 and the prism 25, and has a cylindrical circulation main path 50 </ b> A having a substantially U shape, and a circulation main located above the liquid crystal panels 5, 6, 7. A shunt duct that communicates each cold air flow inlet 52 formed at one end of the path 50A and each cold air discharge port 53 formed at the other end of the circulation main path 50A located below the liquid crystal panels 5, 6 and 7, respectively. 50B. A cooling heat exchanger 10A and a cool air circulation fan 10B are installed in the circulation main path 50A. FIG. 6 shows the liquid crystal panels 5 and 7. In the liquid crystal panel 6, a flow dividing duct 50 </ b> B is formed in the same manner.

  The cool air circulation blower 10B may be a single blower as shown in FIG. 6, but in order to secure the cool air circulation amount for cooling the liquid crystal panels 5, 6, and 7 to a predetermined temperature, the cool air circulation Instead of the air blower 10B, in the present invention, each of the diverting ducts 50B is arranged so that each of the cold air circulating fans 10B1, 10B2, 10B3 is arranged corresponding to each of the diverting ducts 50B in which the respective liquid crystal panels 5, 6, 7 are arranged. These cold air circulation fans 10B1, 10B2, and 10B3 are installed at the cold air flow inlet 52 or the cold air discharge port 53. For the cool air circulation fans 10B1, 10B2, 10B3, for example, a sirocco fan that is rotated by an electric motor is used to secure the air volume. FIG. 6 shows the portions of the liquid crystal panels 5 and 7. Similarly, in the liquid crystal panel 6, the cool air circulation blower 10 </ b> B <b> 2 is arranged corresponding to the diversion duct 50 </ b> B. The liquid crystal panels 5, 6, 7 and the polarizing plates 8A, 8B and the prism 25 are cooled by the cold air cooled by the heat exchanger 10A by the operation of the air circulation fans 10B1, 10B2, 10B3.

  Further, in each branch duct 50B, liquid crystal panels 5, 6, and 7 (any one of the three liquid crystal panels 5, 6, and 7 is installed in one branch duct 50B), and a polarizing plate 8A and 8B are installed. The liquid crystal panels 5, 6, 7 and the polarizing plates 8A, 8B are juxtaposed in the shunt duct 50B with a space therebetween. Further, the polarizing plate 8A is disposed with a space between one wall surface of the diversion duct 50B, and similarly, the polarizing plate 8B is disposed with a space between the other wall surface of the diversion duct 50B. Yes. Further, the shunt duct 50B obstructs the liquid crystal panels 5, 6, 7, the polarizing plates 8A, 8B and the irradiated light, and the image information sent to the prism 25 after being modulated by the liquid crystal panels 5, 6, 7. In addition, the cool air that is exchanged with the heat exchanger 10A is supplied to the liquid crystal panels 5, 6, 7, the polarizing plates 8A, 8B, and the prism 25.

  That is, a hole (not shown) is formed on the polarizing plate 8A side of the diverting duct 50B and at a position corresponding to the polarizing plate 8A (that is, one wall surface of the diverting duct 50B corresponding to the polarizing plate 8A). An opening of a box 27 having an optical path formed therein is connected to this hole (not shown). In addition, a hole 55 is formed in the position corresponding to the polarizing plate 8B on the polarizing plate 8B side of the diverting duct 50B (that is, the other wall surface of the diverting duct 50B corresponding to the polarizing plate 8B). The hole 55 has substantially the same shape as the outer diameter of the prism 25, and one surface of the prism 25 is in contact with or fitted into the hole 55 to close the hole 55. The prism 25 is attached to the hole 55 with a space between each of the polarizing plates 8B.

  By forming the duct 50 as described above, the light emitted to the liquid crystal panels 5, 6 and 7 and the polarizing plates 8 </ b> A and 8 </ b> B and the image sent to the prism 25 after being modulated by the liquid crystal panels 5, 6 and 7. Without obstructing information, the inside of the duct 50 has a sealed structure or a semi-sealed structure, and is cooled by exchanging heat with the evaporator 16, and the air circulating through the duct 50 is supplied to the liquid crystal panels 5, 6, 7, and the like. It can be supplied to the periphery of the polarizing plates 8A and 8B and the prism 25.

  In the present invention, as a projector cooling device, a cooling function unit PC of the projector P is provided in a part of the air conditioning system AC in each room in the house (inside the building). As a result, the cost can be reduced as compared with the case where the room air conditioning system and the projector cooling system are provided separately. Hereinafter, such a configuration will be described.

  The air-conditioning system (air-conditioning apparatus) AC shown in FIG. 1 has three usage-side units 500a, 500b, and 500c as usage-side units, and one usage-side unit 500a serves as a cooling function unit for the projector P. The case where it acts as PC and the other use side units 500b and 500c act as an air conditioning function part for every two rooms HL in the house is shown. If the number of rooms HL in the house is increased to 3 rooms, 4 rooms,..., The use side units similar to the use side units 500b and 500c are changed to use side units 500d, 500e,.・ It should be increased to the wind.

  In the air conditioning system (air conditioning apparatus) AC shown in FIG. 1, reference numeral 1000 denotes a heat source side unit having a compressor 200, a heat source side heat exchanger 300, and a gas-liquid separator 400, and a specific cooling use side. The cooling use side unit 500a of the projector P functioning as a unit has a cooling use side heat exchanger 600a of the projector P, and the air conditioning use side units 500b and 500c are respectively air conditioning use side heat exchangers. 600b and 600c. The heat source side heat exchanger 300b is branched and connected to the refrigerant discharge pipe 700 and the refrigerant suction pipe 800 of the compressor 200 via switching valves 90a and 90b, respectively, while the heat source side unit 1000 and the usage side units 500a and 500b, The high pressure gas pipe 120 branched from the refrigerant discharge pipe 700, the low pressure gas pipe 130 branched from the refrigerant suction pipe 800, and the heat source side heat exchanger 300b. And a liquid pipe 140 connected to the.

  Then, the cooling use side heat exchanger 600a of the projector P is connected to the low pressure gas pipe 130 via the switching valve 160a and to the liquid pipe 140 via the refrigerant pressure reducer 170a such as an electric expansion valve. A circuit is formed. The switching valve 160a switches between a state in which the refrigerant flows into the use side heat exchanger 600a and a state in which the refrigerant does not flow, but the refrigerant is always supplied to the use side heat exchanger 600a during operation of the air conditioning system (air conditioner) AC. This is not necessary in the system where the current flows. In addition, other air-conditioning use-side heat exchangers 600b and 600c are branched and connected to the high-pressure gas pipe 120 and the low-pressure gas pipe 130 via switching valves 150a and 160b and 150c and 160c, respectively, and to the liquid pipe 140. Are connected via refrigerant decompressors 170b, 170c, such as electric expansion valves, to form a refrigerant circuit. 190 is an auxiliary refrigerant pressure reducer such as an electric expansion valve interposed in the liquid pipe 140 on the outlet side of the heat source side heat exchanger 300b.

  The use-side heat exchanger 600a is a double-pipe water heat exchanger. The refrigerant flows through the primary pipe (for example, the inner pipe) of the double pipe, and the secondary-side cold water pipe (for example, the outer pipe). The water flowing through the secondary cold water pipe (outer pipe) is cooled by the refrigerant flowing through the primary pipe (for example, the inner pipe). Then, the water in the secondary side cold water pipe (outer pipe) is circulated by the cooling water pump 75 to the projector side cooling heat exchanger 10A. As one form of the heat exchanger 10A, a cold water pipe through which the cold water 72A passes through a large number of heat radiation fins such as aluminum penetrates and air passes between the heat radiation fins. The cool air cooled by the heat exchanger 10A is circulated so as to cool the projector P by a cool air circulation blower 10B (10B1, 10B2, 10B3), as will be described later.

  Next, the operation of the air conditioning system AC shown in FIG. 1 will be described. When simultaneously cooling all rooms (two rooms in the figure) where the air conditioning system AC is installed, one switching valve 90a of the heat source side heat exchanger 300 is opened and the other switching valve 90b is closed. Further, by opening the switching valves 160a, 160b, 160c of the use side heat exchangers 600a, 600b, 600c and closing the switching valves 150b, 150c and operating the fans 330 and 340, the refrigerant discharged from the compressor 200 is After flowing through the discharge pipe 700, the switching valve 90a, and the heat source side heat exchanger 300 in order, the refrigerant is condensed and liquefied by the heat source side heat exchanger 300, and then through the liquid pipe 140, the refrigerant decompressors 170a of the use side units 500a, 500b, and 500c. , 170b, 170c, where the pressure is reduced. After this pressure reduction, after evaporating and evaporating in each use side heat exchanger 600a, 600b, 600c, compression is performed through the switching valves 160a, 160b, 160c, the low pressure gas pipe 130, the refrigerant suction pipe 800, and the gas-liquid separator 400, respectively. Inhaled into machine 200.

  The temperature control of the use side heat exchanger 600a is based on the temperature detection of a temperature sensor that detects the cooling state of the projector P as will be described later, and the opening degree adjustment of the refrigerant decompressor 170a and / or the rotation speed control of the motor of the compressor 200. Is done by. Further, the temperature control of the use side heat exchangers 600b and 600c is based on temperature detection by a temperature sensor that detects the temperature of the room to be cooled, and the opening degree adjustment of the refrigerant decompressors 170b and 170c and / or the rotation of the motor of the compressor 200 is performed. This is done by numerical control. In this case, the rotation speed control of the electric motor of the compressor 200 is program-controlled by a microcomputer system based on both temperature detection by the temperature sensor of the projector P and temperature detection by the temperature sensor for detecting the temperature of the room to be cooled. The

  Thus, while the heat source side heat exchanger 300 acts as an air-cooled condenser, the use side heat exchangers 600b and 600c acting as evaporators cool the two chambers and use side heat as a water heat exchanger. The chilled water cooled by the exchanger 600a is circulated by the pump 75 to the projector-side cooling heat exchanger 10A, whereby the required part of the projector P is cooled.

  Next, in a case where one of the two rooms is cooled and the other room is heated while securing the state in which the use side unit 500a acts as the cooling function unit PC of the projector P (in the case of illustration, one of the two rooms is cooled and the other is cooled). Will be described. In this case, the switching valve 90a of the heat source side heat exchanger 300 is opened and the switching valve 90b is closed, and the switching valves 160a and 160b of the usage side heat exchangers 600a and 600b of the usage side units 500a and 500b that perform the cooling action are opened. The switching valve 150b is closed. Further, the switching valve 160c of the usage-side heat exchanger 600c of the usage-side unit 500c that performs the heating action is closed, the switching valve 150c is opened, and the refrigerant decompressor 170c is fully opened. Thereby, a part of the refrigerant discharged from the compressor 200 flows to the heat source side heat exchanger 300 through the discharge pipe 700 and the switching valve 90a in order, and the remaining refrigerant discharged from the compressor 200 is a high-pressure gas. Since the refrigerant flows from the compressor 200 to the switching valve 150c and the usage-side heat exchanger 600c of the usage-side unit 500c that performs the heating action through the pipe 120, the refrigerant discharged from the compressor 200 flows into the heat-source-side heat exchanger 300 and the usage-side heat exchanger 600c. Is condensed and liquefied.

  The condensed and liquefied refrigerant is distributed to the refrigerant decompressors 170a and 170b of the usage-side units 500a and 500b via the liquid pipe 140, where the pressure is reduced. After this pressure reduction, after evaporating and evaporating in the use side heat exchangers 600a and 600b, they are merged in the low pressure gas pipe 130 through the switching valves 160a and 160b, respectively, and are sequentially passed through the refrigerant suction pipe 800 and the gas-liquid separator 400. 200 is inhaled.

  Also in this case, the temperature control of the use-side heat exchanger 600a is performed by adjusting the opening of the refrigerant decompressor 170a and / or controlling the rotation speed of the electric motor of the compressor 200 based on temperature detection by a temperature sensor of the projector P as will be described later. Done. The temperature control of the use side heat exchanger 600b is performed by adjusting the opening of the refrigerant decompressor 170b and / or controlling the rotation speed of the motor of the compressor 200 based on temperature detection by a temperature sensor that detects the temperature of the room to be cooled. Is called. In this case, the rotational speed control of the electric motor of the compressor 200 includes temperature detection by the temperature sensor of the projector P, temperature detection by the temperature sensor that detects the temperature of the room to be cooled, and temperature by the temperature sensor that detects the temperature of the room to be heated. Based on the detection, the program is controlled by a microcomputer system.

  Thus, the room is heated by the use side heat exchanger 600c acting as a condenser, and the room is cooled by the use side heat exchanger 600b acting as an evaporator. At the same time, chilled water cooled by the use-side heat exchanger 600a, which is a water heat exchanger, is circulated by the pump 75 to the projector-side cooling heat exchanger 10A, thereby ensuring cooling of the required part of the projector P. Is done.

  During such simultaneous cooling and heating operation, the refrigerant pressure reducer 170c of the use side unit 500c is fully opened to prevent refrigerant pressure loss, but the auxiliary refrigerant pressure reducer prevents the liquid refrigerant pressure in the liquid pipe 140 from becoming unbalanced. The pressure is adjusted at 190.

  Next, a case where the two rooms are heated while securing the state where the use side unit 500a acts as the cooling function unit PC of the projector P will be described. In this case, the switching valve 90a of the heat source side heat exchanger 300 is opened and the switching valve 90b is closed, and the switching valve 160a of the use side unit 500a that performs the cooling action is opened. Further, the switching valves 160b and 160c of the usage-side heat exchangers 600b and 600c of the usage-side units 500b and 500c that perform the heating action are closed, the switching valves 150b and 150c are opened, and the refrigerant decompressors 170b and 170c are fully opened. As a result, the refrigerant discharged from the compressor 200 is distributed to the switching valves 150b and 150c of the usage-side units 500b and 500c that perform the heating action via the discharge pipe 700 and the high-pressure gas pipe 120, and the respective usage-side heat exchangers. It is condensed and liquefied at 600b and 600c. Then, the liquefied refrigerant flows into the liquid pipe 140 through the fully opened refrigerant decompressors 170b and 170c, respectively, and a part of the liquid refrigerant in the liquid pipe 140 is decompressed by the refrigerant decompressor 170a, and then used. The side heat exchanger 600a evaporates and the remaining liquid refrigerant is decompressed by the auxiliary refrigerant decompressor 190 and then evaporated by the heat source side heat exchanger 300, and sequentially passes through the refrigerant suction pipe 800 and the gas-liquid separator 400. It is sucked into the compressor 200.

  As described above, one of the usage-side units 500a, 500b, and 500c is used for cooling the projector P, the other two are used for heating operation, or one of the two is used for cooling the projector P. However, in the case where the other one is in the cooling operation and the remaining one is in the heating operation, the refrigerant pressure reducer of the use side unit in the heating operation is fully opened so that the refrigerant pressure loss does not occur. The liquid refrigerant pressure in 140 is adjusted by the auxiliary refrigerant pressure reducer 190 so that the liquid refrigerant pressure does not become unbalanced, so that the cooling use side unit 500a of the liquid crystal projector P and the cooling side use side unit are secured. Has been.

  In the above operation, when the compressor 200 is operated and the air conditioning system AC is in the air conditioning operation state, and the usage side units 500b and 500c are in the regular air conditioning operation state, the cooling usage side unit 500a of the liquid crystal projector P is used. Can maintain the normal operating state. For this reason, when the usage-side units 500b and 500c are in the regular air-conditioning operation state, the liquid crystal projector P is activated, thereby effectively cooling the liquid crystal projector P and bringing the liquid crystal projector P into the normal operation state. It can be maintained. Therefore, when the air conditioning system AC is in a regular air conditioning operation state, for example, in a state where the control unit detects that the usage-side units 500b and 500c are in a regular air conditioning operation state, the liquid crystal projector P Control to start. Therefore, when the startup power is turned on to the light source 2 of the liquid crystal projector P, when the control unit does not detect that the usage-side units 500b and 500c are in the normal air-conditioning operation state, The light source 2 is not activated, and the light source 2 of the liquid crystal projector P is automatically activated when the control unit detects that the usage-side units 500b and 500c are in the normal air-conditioning operation state. it can.

  FIG. 2 shows a case where air conditioning of a specific room HL such as a theater room and enlargement projection onto the screen SK by the liquid crystal projector P are shown. The use side units 500b and 500c are arranged in the ceiling space TU in the house KK for air conditioning in the room HL, and the air exchanged by the use side heat exchangers 600b and 600c by the operation of the fans 330 and 340 is performed. The air is blown out from the respective air outlets OUT, and the air in the room HL is harmonized and sucked in from the respective air inlets IN, and is circulated by exchanging heat in the respective use side heat exchangers 600b and 600c.

As shown in FIG. 2, the use side unit 500a is also disposed in the ceiling space TU in the house KK, and the liquid crystal projector P is attached to the ceiling portion on the room HL side immediately below or in the vicinity thereof. The liquid crystal projector P stores a projector-side cooling heat exchanger 10A, a cold water supply passage 73A on the use side unit 500a side, a cold water inlet passage 74A on the liquid crystal projector P side, and a cold water return passage on the use side unit 500a side. 73B and a cold water outlet passage 74B on the projector P side are connected. For this reason, it becomes a piping structure which can shorten the length of refrigerant | coolant piping and can restrict | limit the refrigerant | coolant amount small. Further, since the use-side unit 500a and the projector-side cooling heat exchanger 10A are close to each other, it is easy to perform maintenance and repair inspection services.
The heat source side unit 1000 is installed on the rooftop OJ of the house KK, and the heat source side unit 1000 and the use side units 500a, 500b, and 500c are connected by an inter-unit pipe 110.

  As shown in FIG. 2, if the cool air produced by one user side unit 500b is arranged to blow out from the vicinity of the liquid crystal projector P, the heat released from the liquid crystal projector P to the surroundings can be cooled. For this reason, it is preferable to make the cooling capacity of the use side unit 500b larger than the cooling capacity of the use side unit 500c. When the usage-side units 500b and 500c are in the heating operation, the usage-side unit 500b in the vicinity of the liquid crystal projector P collects heat released from the liquid crystal projector P to the surroundings and contributes to increasing the efficiency of the usage-side unit 500b. It will be possible.

  By making the projector P detachable from the usage-side unit 500a, the projector P is suitable for storage, repair, inspection, and the like. This configuration is described below. The cold water supply passage 73A on the usage side unit 500a side, the cold water inlet passage 74A on the projector P side, the cold water return passage 73B on the usage side unit 500a side, and the cold water outlet passage 74B on the projector P side are detachable by the cold water connector 100. It is connected. The connector 100 is provided in a room H where the projector P is installed, and is provided on the projector P side with a primary side connector CA to which a chilled water supply passage 73A on the chilled water device 70 side and a chilled water return passage 73B on the chilled water device 70 side are connected. The secondary side connector CB is detachably connected to the primary side connector CA.

  As shown in FIG. 9, the primary side connector CA is integrally provided with a connector part CAA connected to the cold water supply passage 73A and a connector part CAB connected to the cold water return passage 73B, and the secondary side connector CB is As shown in FIG. 9, the connector portion CBA connected to the cold water inlet passage 74A and the connector portion CBB connected to the cold water outlet passage 74B are integrally provided.

  As shown in FIG. 9, the connector part CAA and the connector part CAB of the primary side connector CA are each provided with a valve VB1 biased by a spring SP1, and the connector part CBA and the connector part CBB of the secondary side connector CB are respectively A valve VB2 biased by a spring SP2 is provided. In the state where the primary side connector CA and the secondary side connector CB are released from each other, as shown in FIG. 9, the primary side connector CA is urged by the spring SP1 so that the valve VB1 is in close contact with the toilet seat VBZ. Then, the cold water passages 73A and 73B are automatically closed, and the secondary connector CB is in close contact with the toilet seat portion VBZ by being biased by the spring SP2 as shown in FIG. Thus, the cold water passages 74A and 74B are automatically closed. For this reason, it can hold | maintain in the state without the water leak from the cold water channel | path by the side of the cold water apparatus 70, and the cold water channel | path by the side of the projector P, respectively.

  In addition, when the primary side connector CA and the secondary side connector CB are connected to each other, the connector portion CBA of the secondary side connector CB and the engaging convex portion HU at each end of the connector portion CBB are connected to the primary side connector CA. A protrusion TP1 formed at the front end of each valve VB1 and a protrusion formed at the front end of each valve VB2 by fitting in a liquid-tight state into engagement recesses HO at the front ends of connector part CAA and connector part CAB. The raised TP2 comes into contact with each other and retracts against the springs SP1 and SP2, and the valves VB1 and VB2 are separated from the toilet seats VBZ. Therefore, the closed chilled water passages 73A and 73B and the chilled water passages 74A and 74B are automatically Open. Accordingly, the cold water supply passage 73A and the cold water inlet passage 74A communicate with each other, and the cold water return passage 73B and the cold water outlet passage 74B communicate with each other.

  As described above, when the primary side connector CA and the secondary side connector CB are fitted in a liquid-tight state, the engagement claw DH1 at the tip of the elastic holding portion DH provided on the outer surface portion of the secondary side connector CB The side connector CA is held by elastically engaging with a locking projection KT provided on the outer surface of the side connector CA. In this holding state, when the mutual connection between the primary side connector CA and the secondary side connector CB is released, the rear end portion DH2 of the elastic holding portion DH is pushed and the engaging claw DH1 is removed from the locking projection portion KT. This is achieved by pulling the primary side connector CA and the secondary side connector CB in the direction of pulling apart.

  1 and 2 show a configuration in which the projector P is cooled by one user side unit 500a. However, the projector P is installed and used in any of a plurality of rooms HL in a building having a plurality of rooms. Can be able to. For this purpose, as shown in FIG. 8, for each room HL where the projector P is installed and used, this primary side connector CA (corresponding to CA1, CA2, CA3 in FIG. 8) is arranged on the wall of the room HL. Therefore, the purpose can be achieved and it is convenient.

  As described above, when the primary side connector CA is arranged for each room HL, the shunt 77A for distributing the cold water passage to the connector part CAA for each room HL communicated with the cold water supply passage 73A and the cold water return passage 73B communicated with each other. A flow divider 77B that distributes the cold water passage to the connector part CAB for each HL is provided.

  Now, when the projector P is installed and used in the uppermost room HL shown in FIG. 8, the secondary connector CB is connected to the primary connector CA1 provided on the wall of the room HL by the above method. Further, in order to enable the projector P to be installed and used in the second and third rooms HL from the top shown in FIG. 8, primary-side connectors CA2 and CA3 are provided on the walls of these rooms HL, respectively. The secondary side connector CB can be connected to this by the above method.

  By connecting the secondary side connector CB to the primary side connector CA (CA1, CA2, CA3), an electric circuit for performing transmission / reception and control of signals on the projector P side and the use side unit 500a side by a control unit described later is provided. In order to be connected, the connector 100 is integrally provided with a detachable electrical connector portion SL for electrical circuit connection. As shown in FIG. 11, the primary configuration is such that a primary side electrical connector SL1 for connecting an electric circuit is integrated into a primary side connector CA (CA1, CA2, CA3) and an electric circuit is connected to a secondary side connector CB. The secondary side electrical connector portion SL2 is integrally incorporated. The primary side electrical connector part SL1 and the secondary side electrical connector part SL2 constitute an electrical connector part SL, and has a concave-convex coupling structure in which one is detachably coupled to the other hole with a protruding pin. The electric circuit connecting connector portion SL on the projector P side and the use side unit 500a side may be formed separately from the connector 100. However, as shown in FIG. The one in which is integrated is excellent in ease of attachment and detachment operations.

  In FIG. 12, a connector 100 is provided to selectively use the projector P in the two rooms HL, and the chilled water cooled by the use side heat exchanger 600a which is a water heat exchanger is pumped. Distributors 77A and 77B, water pipes 73A and 73B, primary connectors CA1 and CA2 of the connector 100, and secondary connectors CB, so as to circulate to the heat exchanger 10A provided in the projector P connected to the connector 100 by 75. Water pipes 74A and 74B are provided. In addition, an electrical circuit is connected to the control unit SG through the electrical connector portion SL of each connector 100. The water path circulated by the pump 75 and the cold air circulation path cooled by the heat exchanger 10A are shown in FIG.

  Now, a case where the projector P is installed and used in one of the rooms HL (for example, the left room HL) shown in FIG. 12 will be described with reference to FIGS. The secondary side connector CB is connected to the primary side connector CA1 provided on the wall of the room HL by the above method. Further, an electrical circuit connecting connector portion SL is also connected. In this state, the pump 75 is started by turning on the operation switch of the projector P. If the control unit SG detects that the operation switch of the projector P is turned ON and the air conditioning system AC is operated at this time, the control unit SG continues the operation of the air conditioning system AC, and the air conditioning system AC If is not operated, the operation of the air conditioning system AC is started by the operation of the control unit SG. By the operation of the air conditioning system AC, the cold water cooled by the usage-side heat exchanger 600a of the usage-side unit 500a is circulated by the pump 75 to the projector-side cooling heat exchanger 10A. Further, when the operation switch of the projector P is turned on, the cooling air circulation fans 10B1, 10B2, and 10B3 are operated, and the liquid crystal panels 5, 6, 7 and the polarizing plates 8A, 8B are cooled by the cold air cooled by the heat exchanger 10A. And cooling of the prism 25 is started.

  In order to maintain the temperature on the air outlet side of the heat exchanger 10A at a predetermined temperature and cool the liquid crystal panels 5, 6, and 7 to the predetermined temperature, the air temperature returned to the heat exchanger 10A or the heat exchanger 10A The cold water temperature on the outlet side is detected by the temperature sensor 84, and the air temperature on the air suction side of the heat exchanger 10A is maintained at a predetermined temperature by the control unit SG. Regarding this control, the rotation speed of the pump 75 is constant (the discharge amount of the pump 75 is constant), and the control unit SG performs the refrigerant decompressor 170a according to the degree of difference between the temperature detected by the temperature sensor 84 and the predetermined temperature. A method of controlling the temperature of the use side heat exchanger 600a by controlling the decompression state (adjusting the opening of the refrigerant decompressor 170a), and controlling the temperature of the use side heat exchanger 600a by controlling the electric motor of the compressor 200. There is a method.

  First, the number of rotations of the pump 75 is constant (the discharge amount of the pump 75 is constant), and the pressure reduction state by the refrigerant pressure reducer 170a is performed by the control unit SG according to the degree of difference between the temperature detected by the temperature sensor 84 and the predetermined temperature. A method of controlling the temperature of the use-side heat exchanger 600a by controlling (opening adjustment of the refrigerant decompressor 170a) will be described.

In order to maintain the temperature on the air outlet side of the heat exchanger 10A at a predetermined temperature and cool the liquid crystal panels 5, 6, and 7 to the predetermined temperature, the air temperature returned to the heat exchanger 10A or the heat exchanger 10A The temperature of the cold water at the outlet side is detected by the temperature sensor 84, and the pressure reduction state by the refrigerant pressure reducer 170a is controlled by the control unit SG (the opening degree of the refrigerant pressure reducer 170a is adjusted), thereby controlling the temperature of the use side heat exchanger 600a. Then, the temperature of the cold water 72A cooled by the use side heat exchanger 600a is controlled to maintain the air temperature on the air suction side of the heat exchanger 10A at a predetermined temperature. To view the cooled state of the projector P, temperature detected by the temperature sensor 84, control by the control unit SG, by temperature displayed on the display unit such as lighting and liquid crystal or organic EL, LED provided to the projector P Can be recognized.

  The chilled water 72A cooled by the use side heat exchanger 600a passes through the flow rate adjusting valve 76, the flow divider 77A, and the connector 100 arranged in the chilled water supply passage 73A by the pump 75 in this order, and is installed in the circulation main path 50A. After the heat is exchanged with the air in the circulation main path 50A, the cold water discharged from the heat exchanger 10A sequentially passes through the connector 100, the flow divider 77B, and the backflow prevention valve 78 disposed in the cold water return passage 73B. Return to the use side heat exchanger 600a. Note that a reserve tank 80 communicates with the cold water return passage 73B on the downstream side of the backflow prevention valve 78 via an opening / closing control valve 81, and the reserve tank 80 functions to adjust the circulation amount of the cold water 72A.

  In order to ensure the cooling of the required part of the projector P, as described above, the temperature of the air returning to the heat exchanger 10A or the temperature of the chilled water on the outlet side is detected by the temperature sensor 84, and the refrigerant decompressor 170a is controlled by the control unit. The pressure reduction state is controlled (adjustment of the opening of the refrigerant pressure reducer 170a). However, when the control exceeding the control range is necessary, or in place of this control, the motor of the compressor 200 is controlled. There is a method of controlling the temperature of the use side heat exchanger 600a, which will be described next.

  The frequency at which the rotational frequency of the pump 75 is constant (the discharge amount of the pump 75 is constant), and the power frequency supplied to the motor of the compressor 200 is increased or decreased according to the difference between the temperature detected by the temperature sensor 84 and the predetermined temperature The inverter control method is used to increase or decrease the rotation speed of the compressor 200 by the control, and the temperature of the use side heat exchanger 600a is maintained at the predetermined temperature according to the degree of difference between the temperature detected by the temperature sensor 84 and the predetermined temperature. Thus, a method of controlling the temperature of the cold water supplied to the heat exchanger 10A to a predetermined temperature is adopted.

  In this method, based on the temperature detected by the temperature sensor 84, the control unit SG varies the operating frequency of the electric motor of the compressor 200 to control the rotation speed, thereby increasing or decreasing the temperature of the use side heat exchanger 600a. Can be controlled. In this control, the control unit SG detects the ambient temperature with an ambient temperature sensor, and controls the compressor 200 to be turned on and off by control with ambient temperature correction, or varies the operating frequency of the motor of the compressor 200. Thus, the capacity control of the compressor 200 is performed to control the temperature of the use side heat exchanger 600a to a predetermined temperature.

  In the above case, the temperature of the air returned to the heat exchanger 10A or the cold water temperature on the outlet side is detected by the temperature sensor 84, and the temperature of the use side heat exchanger 600a is increased or decreased by the control unit SG. The air temperature on the air suction side of the heat exchanger 10A is maintained at a predetermined temperature by adjusting the opening of the refrigerant decompressor 170a of the use side heat exchanger 600a or controlling the operation of the compressor 200. This is total control for controlling the cool air temperature for cooling the liquid crystal panels 5, 6, and 7 to a predetermined temperature.

  Instead of or in addition to such a total control method, a method of controlling the cool air temperature for cooling each liquid crystal panel 5, 6, 7 for each liquid crystal panel 5, 6, 7 can be used. In this system, temperature sensors 82A, 82B, and 82C that detect the temperature of the air that has cooled the corresponding liquid crystal panels 5, 6, 7, and the like are disposed in each of the shunt ducts 50B. Based on the temperature detected by the temperature sensors 82A, 82B, 82C, the control unit SG controls the rotation speed of the corresponding cool air circulation blowers 10B1, 10B2, 10B3 to cool the liquid crystal panels 5, 6, 7, etc. The amount of circulation is varied to control the liquid crystal panels 5, 6, 7 and the like to have a predetermined temperature.

  Depending on the degree of heat generation of the liquid crystal panels 5, 6, 7 and the polarizing plates 8A, 8B and the prism 25, the temperature of the cold air that has passed through the cooling heat exchanger 10A changes, and the temperature of the cold air in each of the shunt ducts 50B changes. Although it is not preferable that the temperature of the liquid crystal panels 5, 6, and 7 become higher than the predetermined temperature because the performance is deteriorated, the liquid crystal panels 5, 6, and 7 are controlled to have the predetermined temperature by the above control. Therefore, the projector P can achieve the expected normal operation.

  In this way, the method of controlling the rotation speed of the cool air circulation fans 10B1, 10B2, and 10B3 corresponding to the liquid crystal panels 5, 6, and 7 is adjusted by adjusting the opening degree of the refrigerant decompressor 170a and the operating frequency of the motor of the compressor 200. In the case of a control method combined with a variable control method, the control unit SG first controls the number of rotations of the cool air circulation fans 10B1, 10B2, and 10B3, and thereby the temperatures of the liquid crystal panels 5, 6, and 7 are predetermined. When the temperature cannot be obtained, the opening degree of the refrigerant decompressor 170a is adjusted, and when the cold air temperature cooled by the heat exchanger 10 cannot obtain the predetermined temperature, the operating frequency of the electric motor of the compressor 200 is set. A control method based on a predetermined order can also be used, such as variable control.

  Instead of or in combination with the control method for adjusting the opening degree of the refrigerant decompressor 170a and the operating frequency of the electric motor of the compressor 200, a control method for changing the discharge flow rate of the pump 75 can be used. In this case, the discharge flow rate of the pump 75 is changed based on the cold air temperature returning from the circulation main path 50A to the heat exchanger 10A or the temperature detected by the temperature sensor 84 for detecting the outlet temperature of the cold water in the heat exchanger 10A. The controller SG controls the temperature of the exchanger 10A or the cold air temperature returning to the heat exchanger 10A to maintain a predetermined temperature. As a result, the cold air temperature cooled by the heat exchanger 10 is maintained at a predetermined temperature, and the temperatures of the liquid crystal panels 5, 6, 7 cooled by the cold air diverted therefrom are maintained at the predetermined temperature.

  In this case, if the cold air temperature returning to the heat exchanger 10A or the cold water outlet temperature of the heat exchanger 10A is higher than a predetermined temperature, the control unit SG increases the rotation speed of the pump 75 to increase the discharge flow rate. If the temperature is lower than a predetermined temperature, the control unit SG reduces the rotational speed of the pump 75 to reduce the discharge flow rate, and sets the cold air temperature returned to the heat exchanger 10A or the outlet temperature of the cold water of the heat exchanger 10A. Try to maintain a predetermined temperature. In this case, depending on the degree of difference between the temperature detected by the temperature sensor 84 and the predetermined temperature, the frequency of the power frequency supplied to the pump 75 is increased or decreased, and the inverter control method for increasing the rotation speed of the pump 75 is used. It is preferable to control the temperature to increase the circulating amount of cold water according to the degree of difference between the detected temperature and the predetermined temperature.

  As described above, when the control for changing the discharge flow rate of the pump 75 is a control method combined with the control method for adjusting the opening degree of the refrigerant decompressor 170a and the operating frequency of the motor of the compressor 200, the control unit First, control is performed to vary the discharge flow rate of the pump 75 by SG, and when the cold air temperature cooled by the heat exchanger 10 cannot obtain a predetermined temperature, the opening degree of the refrigerant decompressor 170a is adjusted. When the cooling air temperature cooled by the heat exchanger 10 cannot obtain a predetermined temperature, the control order is set based on a predetermined order, such as variable control of the operating frequency of the motor of the compressor 200. You can also.

  After turning on the operation switch of the projector P, as described above, the opening degree adjustment control of the refrigerant decompressor 170a is performed by the operation of the temperature sensor 84 and / or the control unit SG based on the temperature detected by the temperature sensors 82A, 82B, and 82C. Each of the liquid crystal panels is controlled by any one or combination control of control for changing the operating frequency of the electric motor of the compressor 200, control for changing the discharge flow rate of the pump 75, and control of the number of rotations of the cooler air circulation fans 10B1, 10B2, and 10B3. 5, 6, 7 and the polarizing plates 8A and 8B and the prism 25 are cooled to a predetermined temperature. When it is recognized that the liquid crystal panels 5, 6, 7 and the like are maintained at a predetermined temperature by the operation of the control unit SG, the fact is displayed on the display unit of the projector P, and The ON operation of the energization switch of the light source 2 of the projector P becomes effective (the light source 2 is controlled by the control unit SG so that it does not emit light even if this energization switch is turned ON before that). After confirming this display, the user of the projector P can enlarge and project the projection light image from the prism 25 on the screen SK through the projection lens 9 by turning on the light source 2 of the light source 2 of the projector P. It becomes a state.

  When the light source 2 is cooled with cold water, as shown in FIG. 7, a light source cold water passage 90A is provided that branches from the downstream side of the pump 75 and circulates the cold water, and the cold water in the light source cold water passage 90A A heat exchanger 10A1 similar to the heat exchanger 10A is provided so as to pass therethrough. Then, the heat exchanger 10A1, the cool air circulation fan 10C, and the light source 2 are arranged in series in the duct 50B. Thereby, the cold air cooled by the heat exchanger 10A1 can be circulated by the cool air circulation blower 10C to cool the light source 2 to a predetermined temperature.

  Although the illustrated control unit SG is one, the control unit SG is divided into a control unit SG1 on the air conditioning system (air conditioning apparatus) AC side and a control unit SG2 on the projector P side, and these control units SG1, SG2 There may be a method of transmitting / receiving (transmitting / receiving) signals (data) between them.

  Further, in FIG. 12, distributors 77A and 77B are provided so that the cold water cooled by the use-side heat exchanger 600a, which is a water heat exchanger, is distributed and supplied to the plurality of rooms HL. Instead of this, the cold water supplied to each room HL is connected to the low-pressure gas pipe 130 via a switching valve (similar to the 160a) as well as the user-side heat exchanger 600a and is liquid. The pipe 140 is provided with a use side heat exchanger (similar to 600a) connected through a refrigerant decompressor (similar to 170a) to form a refrigerant circuit corresponding to each room HL. It is good also as a structure by which control similar to the above is performed by operation | movement of SG.

  FIG. 10 shows what is called a laser projector. The light source 2 of the projector according to the present invention is a semiconductor laser light source, and includes an optical device composed of liquid crystal panels 5R, 6G, 7B, polarizing plates 8R0, 8B0, 8G0, a prism 25, and the like. It is a figure which shows schematic structure of the cooling device of the element 4, and the cool air circulation path of a projector. The same functional parts as those in the first embodiment are denoted by the same reference numerals. The light source 2 is a red (R) laser light source 2R, a green (G) laser light source 2G, and a blue color (B) that emits red (R), green (G), and blue (B) color lights, which are the three primary colors of light. This is a laser light source 2 </ b> B, and these laser light sources are arranged to face the three surfaces of the prism 25. The optical element 4 includes a red (R) liquid crystal panel 5R disposed opposite to the red (R) laser light source 2R, a green (G) liquid crystal panel 6G disposed opposite to the green (G) laser light source 2G, and blue (B). A blue (B) liquid crystal panel 7B disposed opposite to the laser light source 2B, a prism 25, a surface of the prism 25, a red (R) liquid crystal panel 5R, a green (G) liquid crystal panel 6G, and a blue (B) Each of the polarizing plates 8R0, 8G0, 8B0 is disposed between the liquid crystal panel 7B.

  The red (R) laser light source 2R has a configuration in which a large number of red (R) light emitting laser elements 2R2 are arranged in an array on the heat conducting plate 2R1, and the green (G) laser light source 2G is formed of the heat conducting plate 2G1. A large number of red (R) light emitting laser elements 2G2 are arranged in an array on the blue (B) laser light source 2B, and a red (R) light emitting laser element 2B2 is arrayed on the heat conducting plate 2B1. It is a configuration in which a large number are arranged.

  The duct 50 has a shape different from that of the first embodiment, but as a functional configuration, the heat exchanger 10A is disposed in the circulation main path 50A as in the first embodiment, and the heat exchanger 10A has the same structure as the first embodiment. The chilled water cooled by the use-side heat exchanger 600a, which is a water heat exchanger, is circulated to the projector-side cooling heat exchanger 10A by the pump 75, so that cooling of a required part of the projector P is ensured. . Similarly to the first embodiment, the duct 50 includes a shunt duct 50B that shunts the cool air cooled by the heat exchanger 10A to the liquid crystal panels 5R, 6G, and 7B. Each shunt duct 50B includes: A red (R) liquid crystal panel 5R and a polarizing plate 8R0, a green (G) liquid crystal panel 6G and a polarizing plate 8G0, and a blue (B) liquid crystal panel 7B and a polarizing plate 8B0, which are arranged to correspond to the surfaces of the prisms 25, respectively. In each of the branch ducts 50B, the cool air circulation fans 10B1, 10B2, and 10B3 are arranged. The control of the cold air temperature returning to the heat exchanger 10A or the outlet temperature of the cold water of the heat exchanger 10A, the configuration of the connector 100, and the like are the same as in the first embodiment.

  With this configuration, the temperature sensor 84 is provided in the circulation main path 50A, and the temperature sensors 82A, 82B, and 82C are provided in each of the diversion ducts 50B and detected by these temperature sensors in the same manner as described in the first embodiment. Based on the temperature, the control unit SG controls the degree of opening adjustment of the refrigerant pressure reducer 170a, the control for changing the operating frequency of the motor of the compressor 200, and the discharge flow rate of the pump 75, as described in the first embodiment. The liquid crystal panels 5, 6, 7 and the polarizing plates 8A, 8B and the prism 25 are cooled to a predetermined temperature by any one of the control for rotating the cooling air and the rotation speed control of the cooling air circulation fans 10B1, 10B2, 10B3, or the combination control. .

  The red (R) laser light source 2R, the green (G) laser light source 2G, and the blue (B) laser light source 2B may be cooled by cold air flowing through the respective shunt ducts 50B. In order to irradiate, it is preferable to cool to a predetermined temperature such as 25 ° C. ± 1 ° C., 35 ° C. ± 1 ° C., etc. Therefore, it is preferable to use a cooling system using another cooling source. As one of them, as shown in the upper right part of FIG. 10, a light source cold water passage 90 is provided that circulates from the downstream side of the pump 75 and circulates cold water, so that the cold water in the light source cold water passage 90 passes through. A heat exchanger 10A1 similar to the heat exchanger 10A is arranged. And like the duct 50, it is set as the structure of the circulation main path | route 50A1 and each shunt duct 50B1 corresponded to the circulation main path | route 50A and each shunt duct 50B, the heat exchanger 10B is installed in this circulation main path | route, and each shunt duct The red (R) laser light source 2R, the green (G) laser light source 2G, the blue (B) laser light source 2B, and the cooler air circulation fans 10B11, 10B21, and 10B31 are respectively arranged correspondingly. As a result, the cold air cooled by the heat exchanger 10A1 flows through the diversion ducts by the respective cold air circulation fans, whereby the red (R) laser light source 2R, the green (G) laser light source 2G, and the blue (B) laser, respectively. The light source 2B can be cooled to a predetermined temperature.

  The air temperature control on the air suction side of the heat exchanger 10A1 in this case and the temperature control of the red (R) laser light source 2R, the green (G) laser light source 2G, and the blue (B) laser light source 2B are described in the first embodiment. In the same manner as described above, the temperature sensor 84A similar to the temperature sensor 84 is provided in the circulation main path 50A1, and the temperature sensors 82A, 82B, and 82C provided in the diversion ducts 50B are provided in the diversion ducts 50B1. 82AA, 82BA, 82CA are provided, and based on the temperatures detected by these temperature sensors 84A, 82AA, 82BA, 82CA, the opening degree adjustment control of the refrigerant decompressor 170a is performed by the control unit SG in the same manner as described in the first embodiment. Control for changing the operating frequency of the electric motor of the compressor 200, control for changing the discharge flow rate of the pump 75, and a fan 10B11 for circulating cold air By any or a combination control of the rotational speed control of 10B21,10B31, it controls to red (R) laser light source 2R, a green (G) laser light source 2G, blue (B) laser light source 2B reaches a predetermined temperature. Further, the control for enabling the ON operation of the energization switch of the light source 2 of the projector P is the same as that described in the first embodiment.

  As described above in detail, according to the present invention, while reducing the generation of noise as much as possible, the liquid crystal panels 5, 6, and 7, the polarizing plates 8A and 8B, the prism 25 in the first embodiment, and the liquid crystal panel 5R in the second embodiment. , 6G, 7B, polarizing plates 8R0, 8B0, 8G0, and prism 25 can be efficiently cooled, and a high-performance liquid crystal projector can be provided at low cost.

  Further, the light of each color R, G, B irradiated to the liquid crystal panels 5, 6, 7 of the first embodiment, respectively, and the liquid crystal panels 5R, 6G, 7B of the second embodiment are in the order of B, G, R. Since the calorific value is large, the temperature sensor that detects the cold air temperature of each shunt duct so that the cold air supplied to the liquid crystal panels 5, 6, 7 or the liquid crystal panels 5R, 6G, 7B also increases in this order. And the control unit SG makes it possible to control the number of rotations of each cool air circulation blower so that the predetermined number of rotations is achieved by comparison with the predetermined number of rotations set in the control unit SG. The amount of cool air that circulates to the liquid crystal panel irradiated with a large amount of color B light is maximized, the amount of cold air that circulates to the liquid crystal panel irradiated with light of G is smaller than that, and the R light that generates the least amount of heat Circulates to the liquid crystal panel irradiated with It is possible to air volume control such that the most a small amount of.

  Further, the duct 50 of the present embodiment may be configured such that the main circulation path 50A and the respective diversion ducts 50B are detachable from the main body 1. Further, the duct 50 may be configured by a plurality of members that are detachably provided on the main body 1. In this way, by configuring the duct 50 with a plurality of members that are detachably attached to the main body 1, assembly work during production can be performed smoothly. In addition, even during repair, removal work or assembly work after repair can be easily performed.

  For example, by removing the duct 50 attached in the main body 1 from the main body 1 at the time of repair, the repaired part in the main body 1 can be easily repaired or the troubled part can be easily taken out, and the repair work can be easily performed. . Further, the duct 50 can be easily attached to the main body 1 after the repair is completed. In particular, the cool air circulation blower of the first embodiment provided in the duct 50, the liquid crystal panels 5, 6, 7, the polarizing plates 8A and 8B, the prism 25, the cool air circulation blower of the second embodiment, and the liquid crystal panel 5R. , 6G, 7B, polarizing plates 8R0, 8B0, 8G0, and prism 25 can be easily removed and assembled, and repair workability can be significantly improved.

  FIG. 14 is a so-called laser projector, and shows an example of a more specific configuration of the optical element 4 applied to the schematic configuration of the cooling device for the optical element 4 and the cool air circulation path of the projector shown in FIG. . FIG. 14 is a plan view showing a basic configuration of the optical element 4 which is a main part of the projector according to the present invention. Three primary color laser light irradiation surfaces 25R, 25G, 25B is formed. The irradiation surface 25R is irradiated with red laser light, the irradiation surface 25G is irradiated with green laser light, and the irradiation surface 25B is irradiated with blue laser light.

  In each of the irradiation surfaces 25R, 25G, and 25B, the incident side polarizing plates 8R1, 8G1, and 8B1 and the outgoing side polarizing plates 8R2, 8G2, and 8B2 are arranged in parallel to face each other along with the liquid crystal panels 5R, 6G, and 7B. In order to allow specific linearly polarized light components to enter the liquid crystal panels 5R, 6G, and 7B, the light beams of the primary colors are aligned in a predetermined polarization direction (P-polarized light) in the incident-side polarizing plates 8R1, 8G1, and 8B1, and the P-polarized light is liquid crystal After being modulated by the panels 5R, 6G, and 7B, only the S-polarized component of the modulated light is transmitted from the exit-side polarizing plates 8R2, 8G2, and 8B2.

  Condenser lenses CZR, CZG, and CZB that provide a uniform illuminance distribution are arranged in parallel facing the incident-side polarizing plates 8R1, 8G1, and 8B1, and further uniformize the luminance of each laser beam. Integrators (fly eye lenses) FLR, FLG, and FLB are arranged in parallel to face the condenser lenses CZR, CZG, and CZB. The integrator FLR receives the red laser light from the red (R) laser light source 2R, the integrator FLG receives the green laser light from the green (G) laser light source 2G, and the integrator FZB receives the blue laser from the blue (B) laser light source 2B. Incident light.

  The laser light sources 2R, 2G, and 2B are all configured identically, and several tens or more semiconductor laser elements are provided at the tips of heat receiving plates 2R1, 2G1, and 2B1 formed of a metal having excellent thermal conductivity. The arranged semiconductor laser element arrays 2R2, 2G2, and 2B2 are fixed by, for example, a heat conductive adhesive. For example, the semiconductor laser element array 2R2 has a red wavelength band around 650 nm, the semiconductor laser element array 2G2 has a green wavelength band around 550 nm, and the semiconductor laser element array 2B2 has a blue wavelength band of 440 nm. Near laser light is emitted.

  The primary color laser beams emitted from the thus configured semiconductor laser element arrays 2R2, 2G2, and 2B2 must be incident on the combining prism 25 with a predetermined amount of light. Therefore, it is important as a design problem to consider the amount of light emitted from each semiconductor laser element for each primary color, determine the number of elements to be arranged, or set and supply the drive current for each of the three primary colors.

  Since each laser light source 2R, 2G, 2B is configured as described above, the heat generated by each semiconductor laser element array 2R2, 2G2, 2B2 is absorbed by the heat receiving plates 2R1, 2G1, 2B1.

  When the optical element 4 configured as described above is driven, laser beams of three primary colors are emitted from the laser light sources 2R, 2G, and 2B toward the irradiation surfaces 25R, 25G, and 25B of the combining prism 25. The luminance of each color laser beam is made uniform in the integrators FLR, FLG, and FLB, and the illuminance distribution is made uniform in the condenser lenses CZR, CZG, and CZB, and is incident on the incident side polarizing plates 8R1, 8G1, and 8B1.

  The laser beams of the three primary colors made uniform in this way are incident on the liquid crystal panels 5R, 6G, and 7B, and are subjected to gradation (intensity) modulation to form an image, and output side polarizing plates 8R2, 8G2, and 8B2 are transmitted. Then, the light enters the combining prism 25. The laser light of the three primary colors subjected to the gradation modulation is synthesized by the synthesis prism 25. Then, the emitted light exits from the exit surface 25S and is projected onto the screen SK via the projection lens 9.

  The optical element 4 shown in FIG. 14 is cooled by accommodating portions other than the laser light sources 2R, 2G, and 2B in the respective shunt ducts 50B in which the cool air circulation fans 10B1, 10B2, and 10B3 are arranged as shown in FIG. And it cools with the cold air which flows through each shunt duct 50B. That is, in FIG. 10, instead of the liquid crystal panel 5R and the polarizing plate 8R0, the integrator FLR, the condenser lens CZR, the liquid crystal panel 5R, and the incident side polarizing plate 8R1 and the outgoing side polarizing plate 8R2 arranged on both sides thereof 10B1 is accommodated in the shunt duct 50B in which it is disposed, and is cooled by the cold air flowing through the shunt duct 50B. Further, instead of the liquid crystal panel 6G and the polarizing plate 8G0, the integrator FLG, the condenser lens CZG, the liquid crystal panel 6G, the incident side polarizing plate 8G1 and the outgoing side polarizing plate 8G2 arranged on both surfaces thereof, and the cooler circulation fan 10B2 are arranged. It is accommodated in the separated flow duct 50B and cooled by the cold air flowing through the divided flow duct 50B. Further, instead of the liquid crystal panel 7B and the polarizing plate 8B0, the integrator FLB, the condenser lens CZB, the liquid crystal panel 7B, the incident side polarizing plate 8B1 and the outgoing side polarizing plate 8B2 arranged on both sides thereof, and the blower 10B3 for cold air circulation are arranged. It is accommodated in the separated flow duct 50B and cooled by the cold air flowing through the divided flow duct 50B.

  The red (R) laser light source 2R, the green (G) laser light source 2G, and the blue (B) laser light source 2B may be cooled by cold air flowing through the respective shunt ducts 50B. In order to irradiate, as shown in the upper right part of FIG. 10, a red (R) laser light source 2R, a green (G) laser light source 2G, and a blue (B) laser light source 2B are accommodated in each diverter duct 50B1, respectively. Thus, cooling may be performed by the cold air flowing through each of the diverting ducts 50B1.

  In the third embodiment, the projector P according to the present invention is controlled through the power line. This control configuration is shown in FIG. The projector P side signal and the air conditioner AC side signal connected to the control unit SG are transmitted and received through the projector P side power line PL2 and the air conditioner AC side power line PL1 connected to the commercial power source CDG. In the configuration shown in FIG. 13, a plug PG1 extending from the control unit SG is detachably connected to an outlet CST1 connected to a power line (power line) PL1 provided on a ceiling or the like of the room HL, and is provided on a wall or the like on the room HL side. The plug PG2 extending from the auxiliary control unit SSG on the projector P side is detachably connected to the outlet CST2 connected to the power line (power line) PL2.

  In this configuration, temperature sensors 82A, 82B, and 82C, temperature sensor 84, temperature sensors 82A, 82B, and 82C, temperature sensor 84A, and temperature sensors 82AA, 82BA, and 82CA are provided on the input side of the auxiliary control unit SSG. The cool air circulation fans 10B1, 10B2, and 10B3 and the cool air circulation fans 10B11, 10B21, and 10B31 are connected to the output side of the auxiliary control unit SSG. With control unit SG and auxiliary control unit SSG connected to power line PL1 and power line PL2, respectively, signal transmission and reception between control unit SG and auxiliary control unit SSG is performed through power line PL1 and power line PL2, respectively. Is called.

  In the configuration of the first embodiment and the second embodiment, the use side heat exchanger 600a is a double-pipe water heat exchanger, but instead of this method, it is not a water heat exchanger, A refrigerant (evaporator) that cools the surrounding air by evaporation of the refrigerant flowing through the use side heat exchanger 600a, and the use side heat exchanger 600a itself is used as the projector side cooling heat exchanger 10A. Can do. In this case, the use-side heat exchanger 600a that becomes the heat exchanger 10A is installed in the duct 50 of the liquid crystal projector P in the same manner as described above, and the use-side heat that becomes the heat exchanger 10A by the same control configuration as in the first embodiment. The temperature of the air returning to the exchanger 600a is detected by the temperature sensor 84, and the control unit SG performs optical control by controlling the pressure reduction state by the refrigerant pressure reducer (adjustment of the opening of the refrigerant pressure reducer), operation control of the compressor 200, and the like. The element 4 may be controlled to be maintained at a predetermined temperature.

  In this configuration, when the liquid crystal projector P is attached / detached, when the usage-side heat exchanger 600a is disposed in the duct 50 of the liquid crystal projector P, the refrigerant circuit of the usage-side heat exchanger 600a must be configured to be removable. In order to make it possible to remove the liquid crystal projector P instead of the leakage of the refrigerant, the use-side heat exchanger 600a is not arranged in the cold air duct 50 of the liquid crystal projector P, but is replaced with a cold air duct. 50 is disposed in an auxiliary cold air duct outside the liquid crystal projector P communicating with the liquid crystal projector P. Then, the auxiliary cool air duct and the cool air duct 50 of the liquid crystal projector P are connected in a detachable configuration, and the cool air cooled by the use side heat exchanger 600a flows through the cool air duct 50 of the liquid crystal projector P, and the first embodiment is carried out. As in Example 2, the liquid crystal projector P may be controlled to be cooled.

  In each embodiment, a liquid crystal projector is used as an example of a projector. However, a light source in the main body, an optical element that processes light emitted from the light source according to image information, and a processed projection light image are projected on a screen. As long as the projector is provided with a projection lens for this purpose, it can be applied to other types of projectors. The present invention is not limited to the above-described embodiments, and various modifications can be considered without departing from the technical scope of the present invention, and various embodiments according to the modifications are included.

It is a refrigerant circuit block diagram of the air conditioning system (air conditioning apparatus) provided with the projector cooling device which concerns on this invention. Example 1 It is a figure which shows the installation state in the building of the air conditioning system (air conditioning apparatus) provided with the cooling device of the projector which concerns on this invention. Example 1 1 is a schematic perspective view showing a projector in a state in which a projector cooling device according to the present invention is omitted. Example 1 It is a schematic perspective view which shows the inside of the liquid crystal projector of the state provided with the cooling device of the projector which concerns on this invention. Example 1 It is a top view which shows the internal outline of the projector of the state provided with the cooling device of the projector which concerns on this invention. Example 1 It is a figure which shows schematic structure of the cold air circulation path by the AA cross section of FIG. Example 1 It is a block diagram of the cold water circulation path and cold air circulation path which concern on the cooling device of the projector of this invention. Example 1 It is a piping diagram which shows the state which has arrange | positioned the cold-water connector for every room which installs the projector which concerns on this invention. Example 1 It is a block diagram of the primary side connector for cold water of the room in which the projector which concerns on this invention is installed, and the secondary side connector by the side of a projector. Example 1 FIG. 3 is a schematic diagram showing a relationship between a projector and a cooling device for an optical element including a liquid crystal panel as a light source of a projector of the present invention and a projector. (Example 2) It is explanatory drawing of the structure provided with the connector part SL for electrical circuit connection in the primary side connector for cold water of the room which installs the projector which concerns on this invention, and the secondary side connector by the side of a projector. Example 1 It is a refrigerant circuit and water pipe lineblock diagram of an air harmony system (air harmony device) provided with a cooling device of a projector concerning the present invention. Example 1 It is a control block diagram in case control of the projector which concerns on this invention is performed via an electric power line. (Example 3) It is a figure which shows the specific structure of the optical element of the laser projector which concerns on this invention. (Example 2)

Explanation of symbols

AC air conditioning system (air conditioning equipment)
CA Primary side connector of cold water connector 100 CB Secondary side connector of cold water connector 100 HL Indoor room P Liquid crystal projector PC Cooling function part of liquid crystal projector P PL1 Power line on air conditioner AC side PL2 Power line on projector P side SG Control part SL Electrical connector part SL1 Primary side electrical connector part SL2 Secondary side electrical connector part 1 Main body 2 Light source 3 Uniform illumination optical system 4 Optical element 5, 6, 7 Liquid crystal panel 5R Red (R) liquid crystal panel 6G Green (G ) Liquid crystal panel 7B blue (B) liquid crystal panel 8A, 8B polarizing plate 8R0, 8B0, 8G0 polarizing plate 9 projection lens 10A projector-side cooling heat exchanger 10A1 heat exchanger 10B cold air circulation fan 10B1 cold air circulation fan 10B2 Blower for cold air circulation 10B3 Blower for cold air circulation 0B11 Cold air circulation blower 10B21 Cold air circulation blower 10B31 Cold air circulation blower 10C Cold air circulation blower 20 Lamp 21 Reflector 22 Lamp box 25 Prism 73A Cold water supply passage 73B Cold water return passage 74A Cold water inlet passage 74B Cold water outlet passage A 75 Pump 77B Shunt 82A, 82B, 82C Temperature sensor 82AA, 82BA, 82CA Temperature sensor 84 Temperature sensor 84A Temperature sensor 35, 37 Vent 40 Fan 100 Cold water connector 110 Inter-unit piping 120 High pressure gas pipe 130 Low pressure gas pipe 140 Liquid pipe 150b , 150c Switching valve 160a, 160b, 160c Switching valve 170a, 170b, 170c Refrigerant decompressor 200 Compressor 300 Heat source side heat exchanger 330, 340 Fan 500a 500b, 500c user side unit 600a, 600b, 600c utilization side heat exchanger 1000 heat-source side unit

Claims (6)

  A projector comprising: a light source; an optical element including a plurality of liquid crystal panels so as to process light emitted from the light source according to image information; and a projection lens for projecting a processed projection light image onto a screen or the like And a heat source side unit including a compressor and a heat source side heat exchanger, and a plurality of usage side units including a usage side heat exchanger connected by inter-unit piping, the heat source side A high-pressure gas pipe branchingly connected to the refrigerant discharge pipe and a refrigerant suction pipe of the compressor via a switching valve while the inter-unit pipe is branched and connected to the refrigerant discharge pipe, and the refrigerant suction pipe A low-pressure gas pipe branched and connected, and a liquid pipe connected to the heat source side heat exchanger, and the utilization side heat exchanger is branched and connected to the low-pressure gas pipe and 1 Connect via refrigerant decompressor A specific use-side heat exchanger for cooling the projector having a medium circuit, the high-pressure gas pipe and the low-pressure gas pipe are branched and connected via a switching valve, and a second refrigerant decompressor is provided in the liquid pipe. An air-conditioning utilization-side heat exchanger that is connected via a refrigerant circuit, and based on temperature detection of a temperature sensor that detects the cooling temperature of the projector, by temperature control of the specific utilization-side heat exchanger A projector cooling apparatus comprising a control unit for controlling the projector to a predetermined temperature.   A projector comprising: a light source; an optical element including a plurality of liquid crystal panels so as to process light emitted from the light source according to image information; and a projection lens for projecting a processed projection light image onto a screen or the like And a heat source side unit including a compressor and a heat source side heat exchanger, and a plurality of usage side units including a usage side heat exchanger connected by inter-unit piping, the heat source side A high-pressure gas pipe branchingly connected to the refrigerant discharge pipe and a refrigerant suction pipe of the compressor via a switching valve while the inter-unit pipe is branched and connected to the refrigerant discharge pipe, and the refrigerant suction pipe A low-pressure gas pipe branched and connected, and a liquid pipe connected to the heat source side heat exchanger, and the utilization side heat exchanger is branched and connected to the low-pressure gas pipe and 1 Connect via refrigerant decompressor A specific use-side heat exchanger for cooling the projector having a medium circuit, the high-pressure gas pipe and the low-pressure gas pipe are branched and connected via a switching valve, and a second refrigerant decompressor is provided in the liquid pipe. An air conditioning use-side heat exchanger that is connected via a heat exchanger, and based on the temperature detection of a temperature sensor that detects the cooling temperature of the projector, the opening adjustment control of the first refrigerant decompressor, and Alternatively, a projector cooling apparatus comprising a control unit that controls the projector to a predetermined temperature by controlling the operation of the compressor.   A projector comprising: a light source; an optical element including a plurality of liquid crystal panels so as to process light emitted from the light source according to image information; and a projection lens for projecting a processed projection light image onto a screen or the like And a heat source side unit including a compressor and a heat source side heat exchanger, and a plurality of usage side units including a usage side heat exchanger connected by inter-unit piping, the heat source side A high-pressure gas pipe branchingly connected to the refrigerant discharge pipe and a refrigerant suction pipe of the compressor via a switching valve while the inter-unit pipe is branched and connected to the refrigerant discharge pipe, and the refrigerant suction pipe A low-pressure gas pipe branched and connected, and a liquid pipe connected to the heat source side heat exchanger, and the utilization side heat exchanger is branched and connected to the low-pressure gas pipe and 1 Connect via refrigerant decompressor A specific use-side heat exchanger for cooling the projector in which a medium circuit is formed, and the high-pressure gas pipe and the low-pressure gas pipe are branched and connected via a switching valve, and the liquid pipe is connected via a second refrigerant pressure reducer. And the specific use side heat exchanger is a water heat exchanger in which heat is exchanged between the refrigerant in the refrigerant circuit and water, and the water A projector-side cooling heat exchanger provided in the projector so that the chilled water cooled by the heat exchanger is circulated by a pump, and the cool air cooled by the projector-side cooling heat exchanger is ducted around the optical element A temperature sensor for detecting the temperature of the air returning to the projector-side cooling heat exchanger or the temperature of the chilled water at the outlet side of the heat exchanger. And controlling the opening of the first refrigerant pressure reducer, the operation control of the compressor, and the pump so that the air temperature on the air suction side of the heat exchanger for cooling on the projector side is maintained at a predetermined temperature. A projector cooling device comprising a control unit that controls either or a combination of discharge flow rate control and rotation speed control of a cool air circulation blower.   The light sources are a red (R) laser light source, a green (G) laser light source, and a blue (B) laser light source that emit red (R), green (G), and blue (B) color lights, which are the three primary colors of light, respectively. These laser light sources are arranged to face the prism, and the liquid crystal panels are respectively a red (R) liquid crystal panel arranged to face the red (R) laser light source and a green (G) laser light source arranged to face the green (G) laser light source. G) liquid crystal panel, blue (B) liquid crystal panel for blue (B) disposed opposite to the laser light source, and the duct separates the cold air cooled by the projector-side heat exchanger into each of these liquid crystal panels. 4. The projector cooling device according to claim 3, wherein the cooling air blower has a duct configuration, and the blower for circulating cold air is a blower for each of the diverting ducts.   The specific use side heat exchanger is a water heat exchanger that exchanges heat between refrigerant and water in a refrigerant circuit, and a projector side provided in the projector so that cold water cooled by the water heat exchanger is circulated by a pump. A cooling heat exchanger, and a cooling air circulation fan for supplying the cooling air cooled by the projector-side cooling heat exchanger to the periphery of the optical element through a duct, and a cooling water supply passage on the water heat exchanger side And a chilled water inlet passage on the projector side, and a detachable connector of a chilled water return passage on the water heat exchanger side and a chilled water outlet passage on the projector side, for connecting an electric circuit connected to the control unit. The projector cooling device according to claim 1, further comprising a detachable connector portion.   6. The projector side signal and the air conditioner side signal connected to the control unit are transmitted and received through the projector side power line and the air conditioner side power line. A cooling apparatus for a projector according to claim 1.

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