JP2019078417A - Outdoor side heat exchanger in heat pump - Google Patents

Abstract

To prevent frost formation without stopping heating operation and improve heating performance in an outdoor side heat exchanger in a heat pump.SOLUTION: An outdoor side heat exchanger 100 in a heat pump functions as, for example, an evaporator during heating operation of a heat pump type air conditioner, and includes: a heat exchanger body 3 having a tube 1 in which a heating medium flows and a plurality of fins 2 thermally connected to the tube 1; an adsorption device 10 for adsorbing water droplets 4 adhered to the plurality of fins 2 by water absorption fiber 12; and a dehydration device 20 for dehydrating the water absorption fiber 12. The adsorption device 10 adsorbs and removes the water droplets 4 adhered to the plurality of fins by using the water absorption fiber 12 before the water droplets 4 become frost.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an outdoor heat exchanger in a heat pump, and more particularly to an outdoor heat exchanger that prevents frost formation on fins.

  Conventionally, in the heat pump type air conditioner, during the heating operation, the outdoor heat exchanger is an evaporator, and the indoor heat exchanger functions as a condenser to supply warm air to the room. However, in such a heating operation, when the outside air temperature is low, the moisture in the outside air becomes water droplets and adheres to the fins of the outdoor heat exchanger, which causes frost formation due to freezing. As a result, the wind does not flow to the outdoor heat exchanger, the heat exchange efficiency may be reduced, and the heating operation capacity may be significantly reduced.

  Therefore, conventionally, when such frost formation occurs, the defrosting operation is temporarily performed. In this defrosting operation, the heat pump cycle is reversed, and the discharge gas (heat gas) from the compressor is introduced into the outdoor heat exchanger to melt the frost (ice) attached to the fins. The

Unexamined-Japanese-Patent No. 5-322386

  However, when the above-described defrosting operation is performed, the heating operation is stopped during that time, resulting in a decrease in heating performance. Also, in order to melt the frost, it was necessary to throw away a large amount of heat to the outside air, which was wasting energy.

  The outdoor heat exchanger in the heat pump according to the present invention is made in view of the above-mentioned problems, and is a heat exchange having a tube through which a heat medium flows and a plurality of fins thermally connected to the tube. It is characterized by comprising: a vessel body; an adsorbing device which adsorbs water droplets attached to the plurality of fins by means of a water absorbing fiber; and a dewatering device which dewaters the water absorbing fiber.

  According to the outdoor heat exchanger in the heat pump of the present invention, since the adsorption device for adsorbing the water droplets attached to the plurality of fins by the water absorbing fibers and the dehydrating device for dewatering the water absorbing fibers are provided It is possible to prevent frost formation without stopping and greatly contribute to the improvement of the heating performance.

  In addition, according to the outdoor heat exchanger in the heat pump of the present invention, before the water droplets attached to the fins become frost, the water droplets are absorbed and removed by the water-absorbent fibers, so that the conventional heat sinks are compared. Energy consumption can be significantly reduced.

It is a perspective view of an outdoor heat exchanger in a heat pump according to a first embodiment of the present invention. It is a front view of a suction device. It is a top view of other adsorption devices. It is a top view of a water absorption roller. It is a top view explaining operation of a dehydration device. It is a schematic perspective view of an outdoor heat exchanger in a heat pump according to a second embodiment of the present invention.

  An outdoor heat exchanger 100 in a heat pump according to a first embodiment of the present invention will be described based on FIGS. 1 to 5. FIG. 1 is a perspective view of the outdoor heat exchanger 100 in a heat pump. 2 is a front view of the suction device 10, FIG. 3 is a plan view of another suction device 10A, FIG. 4 is a plan view of a water absorbing roller, and FIG. 5 is a plan view for explaining the operation of the dewatering device 20.

  The outdoor heat exchanger 100 in the heat pump functions, for example, as an evaporator during heating operation of the heat pump type air conditioner, and the tube 1 through which the heat medium flows and a plurality of fins thermally connected to the tube 1 The heat exchanger main body 3 having 2, the adsorption device 10 which adsorbs the water droplets 4 attached to the plurality of fins 2 by the water absorbent fiber 12, and the dehydrating device 20 which dewaters the water absorbent fiber 12 Be done. The adsorption device 10 adsorbs and removes the water droplets 4 by the water absorbent fibers 12 before the water droplets 4 attached to the plurality of fins become frost.

  The plurality of fins 2 are members for promoting heat exchange between the outside air and the heat medium, and a plurality of metal plates are attached around the tube 2. End portions of the plurality of fins 2 are contact surfaces with the water absorbent fibers 12.

  The adsorption device 10 performs heat exchange while bringing the outer peripheral surface of the water absorbing resin 12 and the water absorbing roller 13 in which the water absorbing fiber 12 is cylindrically wound around the roller shaft 11 into contact with the ends of the plurality of fins 2. And a rotational movement device 14 for rotationally moving the water absorbing roller 13 from one end 5 of the vessel body 3 to the other end 6. The water absorbing fiber 12 is made of polyurethane, polyolefin or the like, and has a large number of fine holes for adsorbing water and holding water.

  As shown in FIG. 2, the rotational movement device 14 includes a support shaft 15 extending horizontally along the heat exchanger body 3, a first gear 16, and a second gear 17. The first support shaft 15 has a tapered female thread 15a along the longitudinal direction. The support shaft 15 is inserted into the shaft hole 16 a of the first gear 16, and a tapered male screw portion is formed on the inner surface of the shaft hole 16 a of the first gear 16 so as to engage with the tapered female screw portion 15 a of the support shaft 15. It is set up. Although the tapered female screw portion 15a is engraved throughout the entire movement range of the first gear 16 in the support shaft 15, only a part of the tapered female screw portion 15a is shown in FIG. It is

  The roller shaft 11 of the water absorbing roller 13 stands vertically, and the upper end portion of the roller shaft 11 is inserted into the shaft hole 17 a of the second gear 17 and connected to the second gear 17. The first gear 16 and the second gear 17 are so-called miter gears used for rotation of orthogonal axes (the roller shaft 11 and the support shaft 15).

  When the first gear 16 is rotated by a rotational drive mechanism (not shown), the first gear 16 horizontally moves along the support shaft 15, and the second gear 17 rotates. The roller shaft 11 rotates with the rotation of the second gear 17, and the water-absorbent fiber 12 wound around the roller shaft 11 rotates. That is, the water absorbing roller 13 horizontally moves along the support shaft 15 while rotating.

  Next, the configuration of another type of adsorption device 10A will be described based on FIG. The suction device 10A includes a rotary movement device 14A provided with a guide rail 18 for guiding the horizontal movement of the water absorbing roller 13 with the roller shaft 11 interposed therebetween, and a drive device (not shown) for horizontally driving the roller shaft 11. Have.

  In this case, the water absorbent fiber 12 formed in a cylindrical shape is rotatably engaged with the roller shaft 11 around the roller shaft 11. Further, the outer peripheral surface of the water absorbent fiber 12 is disposed so as to abut on the ends of the plurality of fins 2, and when the roller shaft 11 is horizontally moved, the water absorbent fibers 12 abut on the ends of the plurality of fins 2, It is supposed to rotate.

  In the water absorbing roller 13 constituting the above-described suction device 10, 10A, as shown in FIG. 4, the water absorbing fiber 12 is engaged with the outer peripheral surface thereof between the ends of the plurality of fins 2; It is preferable to have several protrusion 19 which consists of. With such a configuration, the protrusions 19 enter the gap between the end portions of the pair of adjacent fins 2, and not only the end face of the fin 2 but also the water droplets 4 attached to the gap can be adsorbed.

  Next, the configuration of the dehydrating apparatus 20 will be described based on FIGS. 1 and 5. As described above, although the adsorption devices 10 and 10A adsorb the water droplets 4 attached to the plurality of fins 2 by the water absorbent fibers 12, the water absorbent fibers 12 containing the water droplets 4 adsorbed and containing a large amount of water absorb water It can not be used repeatedly. Therefore, a dewatering device 20 for dewatering the water absorbent fibers 12 is provided.

  The dewatering device 20 is disposed adjacent to the heat exchanger main body 3 and sandwiches and presses the water absorbing roller 13 moved to the outside of the heat exchanger main body 3 by the rotational movement devices 14 and 14A from both sides and rotates. A pair of dewatering rollers 21 and 22 for dewatering the water absorbent fiber 12 wound around the water absorption roller 13 is provided. Thereby, the water absorption performance of the water absorbent fiber 12 is restored, and it becomes possible to use repeatedly.

  Next, an outdoor heat exchanger 100A in a heat pump according to a second embodiment of the present invention will be described based on FIG. The outdoor heat exchanger 100A in the heat pump functions, for example, as an evaporator during heating operation of the heat pump type air conditioner, and the tube 1 through which the heat medium flows and a plurality of fins thermally connected to the tube 1 2, a heat exchanger main body 3, an adsorbing device 30 for adsorbing the water droplets 4 attached to the plurality of fins 2 by the water absorbing fibers 12, and a dewatering device 40 for dewatering the water absorbing fibers 12 Be done.

  The adsorption device 30 is vertically bridged between a pair of rotating rollers 31 and 32 arranged with the rotation axis horizontal on the upper and lower sides of the heat exchanger main body 3 and a pair of rotating rollers 31 and 32. And a water absorbing belt 33 having a water absorbing fiber which is rotated while being in contact with the end portions of the plurality of fins 2 in accordance with the rotation of 31 and 32. The adsorption device 30 adsorbs and removes the water droplets 4 by the water absorption belt 33 before the water droplets 4 attached to the plurality of fins become frost.

  In this case, one roller shaft of the pair of rotary rollers 31 and 32 is rotated by a rotary drive (not shown). The water absorbing belt 33 may be formed of a film-like water absorbing fiber, or may be formed by bonding a film-like water absorbing resin to the surface of the belt main body. Alternatively, the pair of rotary rollers 31 and 32 may be disposed on the left and right of the heat exchanger main body 3 with the rotation axes perpendicular to each other, and the water absorption belt 33 may be stretched horizontally.

  As described above, the adsorption device 30 adsorbs the water droplets 4 attached to the plurality of fins 2 by the water absorption belt 33, but the water absorption performance of the water absorption belt 33 which adsorbs the water droplets 4 and contains a large amount of water decreases, and the repetition is repeated. It can not be used.

  Therefore, a dewatering device 40 for dewatering the water absorption belt 33 is provided. The dewatering device 40 includes a dewatering roller 41 that dewaters the water absorbing belt 33 by pressing one of the pair of rotating rollers 31 and 32. As a result, the water absorption performance of the water absorption belt 33 can be restored and repeated use is possible.

  Further, as shown in FIG. 6, when the pair of rotating rollers 31 and 32 are disposed adjacent to the upper and lower sides of the heat exchanger body 3, the dewatering roller 41 is a rotating roller disposed below the heat exchanger body 3. By disposing the lower side 32, the water droplets 4 adsorbed by the water absorption belt 33 do not fall and adhere to the plurality of fins 2 again, and can be dropped to the lower side of the heat exchanger main body 3.

  As described above, according to the outdoor heat exchangers 100, 100A, the adsorbing devices 10, 10A, 30 for adsorbing the water droplets 4 attached to the plurality of fins 2 by the water absorbent fibers 12, and the water absorbent fibers 12 Since the dewatering devices 20 and 30 for dewatering are provided, frost formation can be prevented without stopping the heating operation, which can greatly contribute to the improvement of the heating performance.

  Further, according to the outdoor heat exchangers 100 and 100A, since the water droplets 4 are adsorbed and removed by the water-absorbent fibers before the water droplets 4 attached to the plurality of fins 2 become frost, the conventional frost is melted Energy consumption can be significantly reduced compared to things.

DESCRIPTION OF SYMBOLS 1 tube 2 fin 3 heat exchanger main body 4 water droplet 5 one end 6 other end 10, 10 A adsorption device 11 roller shaft 12 water absorbing fiber 13 water absorption roller 14, 14 A rotational movement device 15 support shaft 15 a taper female thread portion 16 1 gear 16a shaft hole 17 second gear 17a shaft hole 18 guide rail 19 projection 20 dewatering device 21, 22 dewatering roller 30 dewatering device 31, 32 rotating roller 33 water absorbing belt 40 dewatering device 41 dewatering roller 100, 100A chamber in heat pump Outer heat exchanger

Claims (6)

A heat exchanger body having a tube through which a heat transfer medium flows, and a plurality of fins thermally connected to the tube;
An adsorption device for adsorbing water droplets attached to the plurality of fins by means of a water absorbing fiber;
And a dewatering device for dewatering the water-absorbent fibers.   The adsorption device includes: a water absorbing roller around which a water absorbing fiber is wound; and a rotational movement device which rotationally moves the water absorbing roller while bringing the water absorbent resin into contact with the ends of the plurality of fins. The outdoor heat exchanger in the heat pump according to claim 1, characterized in that:   The dewatering device is disposed adjacent to the heat exchanger body, and the water absorbing roller moved to the outside of the heat exchanger body by the rotational movement device is pinched and pressed from both sides by the water absorption roller, and the water absorption is performed. The outdoor heat exchanger in a heat pump according to claim 2, further comprising a pair of dewatering rollers for dewatering the rollers.   The heat pump according to claim 2 or 3, wherein the water absorbent fiber has a plurality of projections engaged with the ends of the plurality of fins on the outer peripheral surface of the water absorbent fiber. Outdoor heat exchanger. The adsorption device comprises a pair of rotating rollers disposed on both sides of the heat exchanger body;
And a water absorbing belt having a water absorbing fiber, which is wound around the pair of rotating rollers and rotates while being in contact with the ends of the plurality of fins with the rotation of the pair of rotating rollers. The outdoor heat exchanger in the heat pump according to claim 1.   The outdoor heat exchange in the heat pump according to claim 3, wherein the dewatering device includes a dewatering roller that dewaters the water absorbing belt by pressing one of the pair of rotating rollers. vessel.

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