HEAT EXCHANGING APPARATUS, COOLING APPARATUS, AND PROJECTOR

• US 20190079375A1
• Filed: 09/11/2018
• Published: 03/14/2019
• Est. Priority Date: 09/12/2017
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: NAGATANI, Kaname, NAKAMURA, Kentaro
• Granted Patent: US 10,642,136 B2
• Time in Patent Office: Days
• CPC Class Codes: F28D 1/0333 the plates having integrated connecting members
• CPC Class Codes: F28D 1/0341 with U-flow or serpentine-flow inside the conduits
• CPC Class Codes: F28D 1/05358 Assemblies of conduits connected side by side or with individual headers, e.g. section type radiators
• CPC Class Codes: F28D 15/00 Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies F28D17/00, F28D19/00, F28D20/00 take precedence
• CPC Class Codes: F28D 2021/0028 for cooling heat generating elements, e.g. for cooling electronic components or electric devices for cooling semiconductors H01L23/34, for cooling electric apparatus H05K7/20
• CPC Class Codes: F28F 2009/222 Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
• CPC Class Codes: F28F 9/027 in the form of distribution pipes
• CPC Class Codes: F28F 9/028 by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
• CPC Class Codes: F28F 9/22 Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
• CPC Class Codes: G03B 21/16 Cooling; Preventing overheating
• CPC Class Codes: G03B 21/204 using secondary light emission, e.g. luminescence or fluorescence using different colours G03B33/00; if related to video signals H04N9/3197
• CPC Class Codes: G03B 21/2073 Polarisers in the lamp house peculiar to electronic spatial light modulators H04N9/3197
• CPC Class Codes: G03B 21/208 Homogenising, shaping of the illumination light

Abstract

A heat exchanging apparatus includes one inflow channel having an inflow port via which a liquid refrigerant flows in, one outflow channel having an outflow port via which the liquid refrigerant flowing through the outflow channel flows out, and a plurality of channels arranged in a flow direction of the liquid refrigerant flowing through the inflow channel, the plurality of channels connecting the inflow channel the outflow channel and causing the liquid refrigerant flowing from the inflow channel to flow into the outflow channel. The plurality channels are connected to the inflow channel over a portion from the inflow port to a terminal end of the inflow channel. The inflow channel includes a buffer section disposed between the inflow port and the terminal end, the buffer section configured no reduce a flow rate of the liquid refrigerant flowing through the inflow channel.

Claims

1. A heat exchanging apparatus comprising:

one inflow channel having an inflow port via which a liquid refrigerant flows in, the one inflow channel through which the liquid refrigerant flows in a first direction;

one outflow channel through which the liquid refrigerant having flowed into the inflow channel flows, the one outflow channel having an outflow port via which the liquid refrigerant flowing through the outflow channel flows out; and

a plurality of channels extending in a second direction intersecting the first direction, the plurality of channels arranged in the first direction and connecting the inflow channel to the outflow channel, the plurality of channels causing the liquid refrigerant flowing from the inflow channel to flow into the outflow channel,

wherein the plurality of channels are connected to the inflow channel over a portion from the inflow port to a terminal end of the inflow channel, and

wherein the inflow channel includes a buffer section disposed between the inflow port and the terminal end, the buffer section configured to reduce a flow rate of the liquid refrigerant flowing through the inflow channel

2. The heat exchanging apparatus according to claim 1,

wherein a cross-sectional area, along a third direction perpendicular to the first direction, of the inflow channel in a portion where the buffer section is located is smaller than a cross-sectional area, along the third direction, of the inflow channel in a portion where the buffer section is not provided.

3. The heat exchanging apparatus according to claim 2,

wherein the buffer section a diameter reducer protruding from an inner wall of the inflow channel inward in a radial direction to reduce a diameter of the inflow channel.

4. The heat exchanging apparatus according to claim 3,

wherein the inflow channel includes a plurality of the diameter reducer along the first direction.

5. The heat exchanging apparatus according to claim 2,

wherein the buffer section is a shaft provided in the inflow channel and extending in the first direction, and

wherein the shaft has

a first portion having an outer diameter that is a first length, and

a second portion located on a downstream side of the first portion in the first direction, the second portion having an outer diameter that is a second length greater than the first length.

6. The heat exchanging apparatus according to claim 5,

wherein the outer diameter of the shaft increases in the first direction.

9. The heat exchanging apparatus according to claim 1,

wherein the inflow channel and the outflow channel are disposed to be parallel to each other.

11. A cooling apparatus comprising:

the heat exchanging apparatus according to claim 1;

a tank configured to store the liquid refrigerant;

a heat exchanger configured to transfer heat of a cooling target to the liquid refrigerant to cool the cooling target; and

a pump configured to cause the liquid refrigerant to which the heat of the cooling target has been transferred to flow into the heat exchanging apparatus.

13. A projector comprising:

a light source apparatus configured to emit light;

a light modulator configured to modulate the light emitted from the light source apparatus in accordance with image information;

a projection optical apparatus configured to project the light modulated by the light modulator; and

the cooling apparatus according to claim 11.

15. The projector according to claim 13,

wherein the cooling target is the light modulator.

17. The projector according to claim 13, further comprising

a polarization conversion element configured to align polarization directions of light incident thereon with one another,

wherein the cooling target is the polarization conversion element.

18. The projector according to claim 13, further comprising

a wavelength converter configured to convert a wavelength of light incident thereon,

wherein the cooling target is the wavelength converter.

20. The projector according to claim 13, further comprising

a light diffuser configured to diffuse light incident thereon,

wherein the cooling target is the light diffuser.

7. A heat exchanging apparatus comprising:

one inflow channel having an inflow port via which a liquid refrigerant flows in, the one inflow channel through which the liquid refrigerant flows in a first direction;

a first primary channel disposed along the first direction, the first primary channel through which the liquid refrigerant having flowed into the inflow channel flows;

a second primary channel disposed along the first direction, the second primary channel through which the liquid refrigerant having flowed into the first primary channel flows;

one outflow channel through which the liquid refrigerant having flowed into the second primary channel flows, the one outflow channel having an outflow port via which the liquid refrigerant flowing through the outflow channel flows out;

a plurality of first channels extending in a second direction intersecting the first direction, the plurality of the first channels arranged in the first direction and connecting the inflow channel to the first primary channel, the plurality of the first channels causing the liquid refrigerant flowing from the inflow channel to flow into the first primary channel;

a plurality of second channels extending in the second direction, the plurality of the second channels arranged in the first direction and connecting the first primary channel to the second primary channel, the plurality of the second channels causing the liquid refrigerant flowing from the first primary channel to flow into the second primary channel; and

a plurality of third channels extending in the second direction, the plurality of the third channels arranged in the first direction and connecting the second primary channel to the outflow channel, the plurality of the third channels causing the liquid refrigerant flowing from the second primary channel to flow into the outflow channel.

8. The heat exchanging apparatus according to claim 7,

wherein the inflow channel and the second primary channel are integrated with each other,

wherein a center axis of the inflow channel and a center axis of the second primary channel are parallel to each other,

wherein the outflow channel and the first primary channel are integrated with each other, and

wherein a center axis of the outflow channel and a center axis of the first primary channel are parallel to each other.

10. The heat exchanging apparatus according to claim 7,

wherein the inflow channel and the outflow channel are disposed to be parallel to each other.

12. A cooling apparatus comprising:

the heat exchanging apparatus according to claim 7;

a tank configured to store the liquid refrigerant;

a heat exchanger configured to transfer heat of a cooling target to the liquid refrigerant to cool the cooling target; and

a pump configured to cause the liquid refrigerant to which the heat of the cooling target has been transferred to flow into the heat exchanging apparatus.

14. A projector comprising:

a light source apparatus configured to emit light;

a light modulator configured to modulate the light emitted from the light source apparatus in accordance with image information;

a projection optical apparatus configured to project the light modulated by the light modulator; and

the cooling apparatus according to claim 12.

16. The projector according to claim 14,

wherein the cooling target is the light modulator.

19. The projector according to claim 14, further comprising

a wavelength converter configured to convert a wavelength of light incident thereon,

wherein the cooling target is the wavelength converter.