HK1142385B - Cooling/heating panel - Google Patents

Description

Refrigeration and heating panel

Technical Field

The present invention relates to a cooling/heating panel that cools and heats a room by radiant heat obtained by fluid heat exchange.

Background

Conventionally, there are radiation type cooling and heating panels applied to ceilings. Such a cooling/heating panel is provided on a ceiling, and includes a radiation panel made of metal or gypsum board, and a heat exchange tube made of metal or resin is disposed on a back surface of the radiation panel. Fluid at a predetermined temperature flows through the heat exchange tubes installed in the ceiling to cool and heat the room.

As a ceiling cooling and heating panel having a metal pipe, there is a ceiling element disclosed in patent document 1 in which a metal heat exchange pipe made of copper or the like is attached to the rear surface of an air conditioning panel of a ceiling. Since the metal heat exchange tube has good thermal conductivity and high gas barrier properties, oxygen does not permeate therethrough, and the circuit parts and the like of the connection portion do not rust.

On the other hand, a resin heat exchanger tube has characteristics of good workability, light weight, and low cost, but has a lower thermal conductivity than a metal heat exchanger tube. Therefore, as in the ceiling radiation cooling/heating panel disclosed in patent document 2, a structure has been proposed in which a heat exchange tube is covered with a metal soaking plate and the heat exchange tube is sandwiched between the heat exchange tube and the back surface of the radiation panel. Thereby, heat from the heat exchange tubes is efficiently conducted to the radiation panel.

However, the resin heat exchanger tubes are poor in gas barrier properties, and oxygen in the air enters the heat exchange medium passing through the heat exchanger tubes, which causes problems such as rusting of circuit components of the heat exchange medium. Further, a plurality of sound absorbing holes are formed through the cooling/heating panel of the ceiling, and in the event of a fire, there is a possibility that flame enters the rear surface of the radiation panel through the sound absorbing holes to ignite the heat exchanger tubes. Even if there is no ignition, there is a risk that the heat melts and leaks from the sound-absorbing hole of the radiation panel.

Therefore, as disclosed in patent document 3, a structure has been proposed in which a noncombustible sheet or a noncombustible plate material is interposed between a radiation panel having a sound absorbing hole and a heat exchange panel.

Patent document 1: japanese laid-open patent publication No. 10-232035

Patent document 2: japanese patent laid-open No. 2006 and 170551

Patent document 3: japanese laid-open patent publication No. 10-227495

However, the heat exchanger tube made of metal as in patent document 1 of the above-mentioned conventional art has a large mass, and thus a load on the ceiling material becomes large, and the supporting member for the ceiling material also becomes large and heavy, and the mass of the ceiling portion as a whole becomes large. As a result, the technique has an influence on the structure of the earthquake resistance and the like of the building. Further, the metal heat exchange tube is difficult to be processed into a meandering shape and is easily plastically deformed. For example, even if a metal heat exchanger tube is attached to a tube holding portion of a ceiling plate material, the heat exchanger tube must be attached with a deformation amount within elastic limits in order to be elastically deformed and tightly adhered, and therefore it is difficult to set dimensions that are not likely to be deviated and can be elastically held. Therefore, it is practically difficult to elastically hold the tube, and the entire surface of the tube cannot be attached to the holding portion in close contact therewith over the entire length of the tube. Further, the space layer does not provide good heat conduction between the heat exchange tube and the holding portion in the portion that is not in close contact with each other, and the structure does not exhibit the advantage of metal heat conduction.

Further, in the case of the structure in which the heat exchanger tube is sandwiched by the metal plates as in patent document 2, it is necessary to accurately position the heat exchanger tube on the radiant panel and fix the metal soaking plate so as to cover the heat exchanger tube at a predetermined position, and assembly and construction are difficult and time-consuming. Therefore, the cost of the cooling/heating panel and the cooling/heating device using the same is likely to increase.

Further, as in patent document 3, when a noncombustible sheet is provided between the heat exchange tube and the radiation panel, the noncombustible sheet uses a ceramic sheet or the like, and therefore the thermal conductivity is greatly reduced as compared with metal. Therefore, heat cannot be transferred reliably and efficiently as in metal, and the heat efficiency as a cooling/heating device becomes low.

Disclosure of Invention

The present invention has been made in view of the above-described problems of the conventional technology, and an object of the present invention is to provide a cooling/heating panel having a high heat exchange efficiency, a simple structure, a light weight, and easy assembly.

The present invention provides a cooling/heating panel provided with a plate-shaped radiation panel, a metal holding member partially disposed on the back surface of the radiation panel, and a resin heat exchange tube held by the holding member, wherein the holding member is a long member attached along a linear portion of the heat exchange tube, and a flat soaking plate superposed on the radiation panel and a holding portion formed integrally by metal and having a semicircular bent portion vertically opened from the surface of the soaking plate and engaging with the heat exchange tube are formed integrally; the flat back surface of the soaking plate is adhered to the back surface of the radiation panel; the outer diameter of the heat exchanger tube is larger than the inner diameter of the holding portion before the heat exchanger tube is attached to the holding portion, and the holding portion is also in close contact with the side surface of the heat exchanger tube when the heat exchanger tube contracts or expands during cooling and heating; the holding portion elastically sandwiches a side surface of the heat exchanger tube from both sides in a state where the heat exchanger tube is attached to the holding portion.

The radiation panel has a plurality of sound absorbing holes penetrating in the thickness direction, and a noncombustible sheet is laid on the radiation panel except for the portion where the soaking plate is provided.

The soaking plate reaches a curved portion continuous with the straight portion of the heat exchange tube mounted to the holding member in a curved manner, the holding portion is removed from the vicinity of an end portion of the soaking plate facing the curved portion, and the curved heat exchange tube can be provided in contact with the soaking plate.

An opening between the pair of bent portions is formed narrower than an inner diameter of the holding portion formed by the bent portions, and the heat exchanger tube can be elastically deformed and fitted into the holding portion.

The heat exchange tube is a gas barrier tube, the layer located on the inner periphery is made of polyurethane, the layer located on the outer side is made of ethylene-vinyl alcohol copolymer, and the layer located on the outer periphery on the outer side is made of polyurethane.

The heat exchange tube is a gas barrier tube, the inner peripheral layer is made of nylon, the outer layer is made of polyurethane, the outer layer is made of ethylene-vinyl alcohol copolymer, and the outer peripheral layer is made of polyurethane.

The present invention provides a cooling/heating panel having a simple structure, a heat exchange tube can be easily attached, heat conduction between a metal holding member and a resin heat exchange tube is good, and the metal holding member can reliably transmit the temperature of a heat exchange fluid of the heat exchange tube to a radiation panel. Thus, the heat exchange efficiency between the fluid flowing through the heat exchange tube and the radiation panel is high, and a cooling/heating panel having high energy efficiency can be formed.

Further, the mass of the cooling/heating panel can be reduced as compared with the conventional metal heat exchange tube, and the effect of reducing the mass of the cooling/heating panel is great if the heat exchange tube is considered as the whole building. Further, although a metal heat exchanger tube is easily plastically deformed and it is difficult to attach the heat exchanger tube to a holding member by elastically adhering the heat exchanger tube to the holding member, the structure of the present invention can provide excellent heat conduction even in a resin heat exchanger tube.

Further, since the non-combustible sheet is provided on the rear surface of the radiant panel except for the portion where the receiving step is attached, the non-combustibility can be reliably ensured even when the heat exchange tube is made of resin.

Further, the cooling/heating panel of the present invention is light in weight, has high heat exchange efficiency, and can suppress oxidation of the connecting members and the like.

Drawings

Fig. 1 is a front view of a cooling and heating panel according to a first embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is an enlarged sectional view taken along line a-a.

Fig. 4 is a partially cut-away perspective view of the heat exchange tube of the cooling and heating panel of the embodiment.

Fig. 5 is a schematic view showing a method of using the cooling/heating panel according to the embodiment.

Fig. 6 is a partially cut-away perspective view showing a modification of the heat exchange tube of the cooling and heating panel according to the embodiment.

Fig. 7 is a front view of a cooling and heating panel according to a second embodiment of the present invention.

Fig. 8 is a sectional view taken along line B-B of fig. 7.

Fig. 9 is a front view of a cooling and heating panel according to a third embodiment of the present invention.

Fig. 10 is an enlarged sectional view taken along line C-C of fig. 9.

Fig. 11 is a schematic diagram showing a method of using the cooling/heating panel according to the third embodiment.

Fig. 12 is a front view showing a modification of the arrangement of the heat exchange tube of the third embodiment.

Description of the reference symbols

10 the ceiling uses and makes the warm panel

12 radiation panel

14 sound absorbing hole

16 heat exchange tube

16a straight line part

16b curved part

18 holding member

20 soaking plate

22 holding part

22a bending part

22b wing part

23 incombustible sheet

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 to 5 are views showing a first embodiment of the present invention, and the cooling/heating panel of this embodiment is a ceiling cooling/heating panel 10 and includes a plate-shaped radiation panel 12. The radiation panel 12 is formed of a metal plate such as aluminum or iron, a gypsum board, concrete, or the like, and has a plurality of sound absorbing holes 14 formed therethrough. The heat exchange tubes 16 are held by a holding member 18 as described below on the back surface 12a of the radiant panel 12. The heat exchange tube 16 is formed alternately with a straight portion 16a that extends across the width of the radiant panel 12 in one direction and a curved portion 16b that is bent and folded back before reaching the end of the radiant panel 12, and continuously meanders.

As shown in fig. 1 to 3, a holding member 18 for holding the linear portion 16a of the heat exchange tube 16 is attached to the rear surface 12a of the radiant panel 12. The holding member 18 is a long member made of metal such as aluminum extrudate and attached along the linear portion 16a of the heat exchange tube 16, and has a constant cross-sectional shape in the longitudinal direction. The holding member 18 has a sectional shape as shown in fig. 3, and includes a soaking plate 20 as a plate body superposed on the back surface 12a of the radiant panel 12, and a holding portion 22 for holding the heat exchange tubes 16 is provided at the center of the soaking plate 20. The holding portion 22 is formed with a semicircular bent portion 22a that is erected from the soaking plate 20 and is opened upward, and a wing portion 22b that is spread outward is integrally formed at the tip of the bent portion 22 a. The inner diameter D of the bent portion 22a is slightly smaller than the outer diameter D of the heat exchange tube 16 at normal temperature, and the inner peripheral surface of the bent portion 22a is formed to be in close contact with the outer peripheral surface of the heat exchange tube 16, and elastically sandwich the side surface of the heat exchange tube 16 from both sides. The opening 27 between the pair of bent portions 22a is formed to be slightly narrower than the inner diameter d of the holding member 18 formed by the bent portions 22a, and can be provided by the wing portions 22b elastically deforming to receive the opening of the heat exchange tube 16 and fitting between the bent portions 22 a.

The back surface 12a of the radiation panel 12 to which the holding member 18 is attached is subjected to priming treatment for securing adhesiveness, and is bonded to the back surface 12a with a hot-melt adhesive 25 such as a thermoplastic resin. Further, the back surface of the holding member 18 is painted black so as not to be easily seen from the front side of the radiation panel 12 through the sound absorbing hole 14.

As shown in fig. 4, the heat exchange tube 16 is a gas-barrier tube having a 3-layer structure, the first layer 17 on the inner peripheral surface is made of polyurethane, the second layer 19 on the outer side is made of ethylene-vinyl alcohol copolymer (hereinafter, referred to as EVOH), and the third layer 21 on the outer peripheral surface is made of polyurethane. The EVOH has a high gas barrier property, and prevents oxygen in the air from dissolving into the heat exchange fluid passing through the heat exchange tube 16. Since polyurethane is soft and easily deformable, even if EVOH is provided on the second layer 19, it is easily incorporated into the holding portion 22 of the holding member 18. Further, since polyurethane has a rebound elasticity, the outer diameter is restored to the original shape after being incorporated into the holding portion 22, and the polyurethane is reliably held in close contact with the inner surface of the holding portion 22, and has a structure with good heat conduction.

Next, a method of attaching the heat exchange tube 16 to the holding member 18 will be described. The heat exchanger tube 16 is pressed between the pair of wing portions 22b, the bent portions 22a and the heat exchanger tube 16 are elastically deformed, and the bent portions 22a are pressed therebetween to be elastically locked. At this time, a dedicated jig for pushing the heat exchange tube 16 into the bent portion 22a of the holding member 18 may be used.

A noncombustible sheet 23 is laid on the rear surface 12a of the radiation panel 12 except for the holding member 18. The noncombustible sheet 23 is, for example, a ceramic sheet, a glass wool sheet, or another noncombustible sheet-like structure. As shown in fig. 3, the noncombustible sheet 23 is inserted into the notches 20a formed on the back surfaces of both side edge portions of the soaking plate 20 of the holding member 18, and the edge portions are held.

Next, a method of using the cooling/heating panel 10 for a ceiling will be described with reference to fig. 5. The ceiling cooling and heating panel 10 is installed in a row on the ceiling of the room, and the back surface 12a of the radiation panel 12 is the roof back side. The end portions of the heat exchange tubes 16 are connected to each other by a connecting portion 24. The heat exchange tubes 16 to which the plurality of ceiling cooling and heating panels 10 are connected at one end to the supply-side main tube 26 and at the other end to the return-side main tube 28. The supply-side main pipe 26 and the return-side main pipe 28 are connected to a heat source 30 such as a water heater.

The heat source 30 supplies a heat exchange fluid at a desired temperature to the heat exchange tubes 16 of the ceiling cooling and heating panel 10. The heat exchange fluid is, for example, water. The water of a predetermined temperature supplied from the heat source 30 to the supply-side main pipe 26 is supplied from one end portion of the heat exchange tube 16, flows through the plurality of heat exchange tubes 16 joined by the joining member 24 from the other end portion to the return-side main pipe 28, and is returned to the heat source 30. During the passage of the water through the heat exchange tubes 16, heat exchange is performed with the radiant panel 12 via the holding member 18. In the heat source 30, the water is again adjusted to a desired temperature and supplied to the supply-side main pipe 26.

The cooling and heating panel 10 for a ceiling according to this embodiment has a relatively simple structure and can reliably perform heat exchange. Since the holding member 18 is made of a metal having high thermal conductivity, heat is exchanged between the heat exchange tubes 16 and the radiation panel 12 via the holding member 18, and thermal efficiency is good. Further, the outer diameter D of the heat exchange tube 16 is slightly larger than the inner diameter D of the holding member 18 at normal temperature, and the outer peripheral surface of the heat exchange tube 16 is reliably in close contact with the inner surface of the holding member 18, thereby performing good heat conduction. In particular, when cold water is caused to flow into the heat exchange tubes 16 during cooling, the heat exchange tubes 16 become cooler than the holding member 18 and contract more than the holding member 18. However, at normal temperature, the heat exchange tubes 16 have an outer diameter D slightly larger than the inner diameter D of the holding member 18, so that the heat exchange tubes 16 are reliably in close contact with the inner surface of the holding member 18 and conduct heat well. Further, if warm water is passed into the heat exchange tubes 16, the heat exchange tubes 16 are more strongly adhered to the curved portions 22a of the holding member 18 because the diameter of the heat exchange tubes 16 becomes slightly thicker due to the temperature and pressure of the water. This improves the heat exchange efficiency between the heat exchange tubes 16 and the holding member 18.

Further, the heat exchange tube 16 has a three-layer structure, the first layer 17 and the third layer 21 are made of polyurethane, and are flexible and easy to process, and the second layer 19 is made of EVOH having a high gas barrier property, and prevents oxygen in the air from dissolving into the circulating water. Since oxygen does not dissolve in water, the connecting member 24 and the like can have durability without corroding even if made of metal.

Since the heat exchange tube 16 is mounted and held by the elastic force of the holding portion 22 of the holding member 18, a special locking device is not required, and the structure is simple. Further, the heat exchange tube 16 can be easily attached and detached, and can be simply pushed into the curved portion 22a while being guided by the wing portions 22b of the holding portion 22, by a simple operation of pushing between the wing portions 22b of the holding portion 22 during attachment. By being guided by the wing portions 22b, the holding portion 22 is not damaged by an excessive force and is safe.

Further, the mass of the ceiling cooling/heating panel 10 can be reduced by about 10% as compared with the conventional heat exchange tube made of metal such as copper, and the effect of reducing the mass of the ceiling cooling/heating panel 10 has a large influence on the vibration resistance of a building in which the ceiling cooling/heating panel 10 is used as a ceiling panel.

Furthermore, the metal heat exchange tube is easily plastically deformed, and even if it is mounted on, for example, the holding member 18, it is necessary to hold the heat exchange tube by a deformation amount within an elastic limit due to elastic deformation, and it is difficult to set the size of the heat exchange tube. Therefore, the heat exchange tube is easily plastically deformed when it is attached to the holding member 18, and in the case of a metal heat exchange tube, the heat exchange tube cannot be elastically brought into close contact with the bent portion 22a over the entire length as in the present embodiment.

In the cooling/heating panel 10 for a ceiling, since the portion of the radiation panel 12 other than the receiving tool 18 is covered with the incombustible sheet 23, incombustibility is improved, and ignition and the like to the heat exchange pipe 16 are prevented in the case of a fire. Furthermore, even if an inexpensive synthetic resin is used in the heat exchange tube 16, the assumption of incombustibility can be obtained.

The heat exchange tube 16 may have a 4-layer structure as shown in fig. 6, in addition to a 3-layer structure. In the gas barrier tube of the heat exchange tube 32 shown in fig. 6, the first layer 34 on the inner peripheral surface is nylon, and the second layer 36 on the outer side thereof is polyurethane. The third layer 38 on the outer side is EVOH, and the fourth layer 40 on the outer peripheral surface on the outer side is polyurethane. The nylon of the first layer 34 has high water resistance, and therefore, the heat exchange tube 16 and the like can have improved durability. Further, nylon or a known resin other than nylon may be laminated on the outside of the gas barrier tube.

Next, a second embodiment of the present invention will be described with reference to fig. 7 and 8. Here, the same components as those of the above embodiment are assigned the same reference numerals, and description thereof is omitted. The ceiling cooling and heating panel 42 of this embodiment is also provided with a holding member 44 that holds the linear portion 16a of the heat exchange tube 16 on the rear surface 12a of the radiation panel 12. The holding member 44 is made of metal such as aluminum extrudate, is a long member attached along the linear portion 16a of the heat exchange tube 16, and has a constant cross-sectional shape in the longitudinal direction. The holding member 44 is provided with a vapor chamber 46 as a plate body to be superimposed on the back surface 12a of the radiation panel 12, and the holding portion 22 is provided at the center of the vapor chamber 46. The holding member 44 is attached to the end of the radiation panel 12 to reinforce the radiation panel 12 against deflection.

The holding portion 22 is provided in a portion of the soaking plate 46 where the linear portion 16a of the heat exchange tube 16 is located, and holds the linear portion 16 a. The end portion 46a in the longitudinal direction of the soaking plate 46 is in contact with the curved portion 16b connected to the linear portion 16a of the heat exchange tube 16. Further, a soaking plate 47 is bonded to the back surface of the radiant panel 12 between the longitudinal ends 46a of the soaking plate 46 where the curved portion 16a is located. Further, the holding portion 22 is removed near the end portion 46a of the soaking plate 46 that contacts the curved portion 16 b. Therefore, the curved portion 16 is placed only on the soaking plates 46 and 47.

The holding portion 22 may be configured by removing only the curved portion 16b of the heat exchange tube 16, and the same effect as described above can be obtained in this case. Alternatively, the curved portion 16b may be connected to the holding portion 22 of the adjacent soaking plate 46 so as to straddle the holding portion 22 without removing the holding portion 22. In this case, the number of steps for removing the holding portion 22 can be reduced.

The ceiling cooling and heating panel 42 of this embodiment has the same effects by the same use method as in the above embodiment. Since the soaking plates 46, 47 are also positioned between the curved portion 16b of the heat exchange tube 16 and the radiant panel 12, the thermal efficiency is further improved. Even in the case of a large radiation panel 12, the holding member 44 reinforces the panel to prevent the panel from being bent, and the appearance is good.

Next, a third embodiment of the present invention will be described with reference to fig. 9 to 12. Here, the same components as those of the above embodiment are assigned the same reference numerals, and description thereof is omitted. The ceiling cooling and heating panel 50 according to this embodiment is also provided with the holding member 18 for holding the linear portion 16a of the heat exchange tube 16 on the back surface 12a of the radiation panel 12.

The heat exchange tubes 16 of this embodiment are mounted to the holding portions 22 by being bent in the same direction at intervals of 1 with respect to the holding members 18 fixed to the radiant panel 12.

The ceiling cooling and heating panel 50 of this embodiment also has the same effects by the same use method as the above-described embodiment, and since the heat exchange tubes 16 are bent in a constant direction, the heat exchange tubes 16 are always bent in a direction that is customary for bending, and the curved portions 16b can be set more easily.

Similarly, as shown in fig. 12, both ends of the heat exchange tube 16 may be provided on both sides of the radiant panel 12. In this case, the same effects as those of the above embodiment can be obtained.

The cooling/heating panel according to the present invention is not limited to the above embodiments, and the arrangement and shape of the heat exchange tubes may be appropriately set, and the arrangement, number of times of meandering or bending of the heat exchange tubes may be appropriately set. The shape and size of the radiation panel, the interval of the sound absorption holes, and the like can be appropriately selected. The material and thickness of the radiation panel and the incombustible sheet may be changed as appropriate, and the cooling and heating panel may be used in an appropriate place such as a wall, in addition to a ceiling. The heat exchange tube may be subjected to a treatment such as aluminum vapor deposition on the outer peripheral surface thereof in order to improve gas barrier properties.

Claims (3)

1. A cooling/heating panel provided with a plate-like radiation panel, a metal holding member partially disposed on the back surface of the radiation panel, and a resin heat exchange tube held by the holding member,

the holding member is a long member attached along the linear portion of the heat exchange tube, and integrally formed with a flat soaking plate superposed on the radiant panel and a holding portion made of a semicircular bent portion erected from the surface of the soaking plate and having an upper opening, and engaging the heat exchange tube;

the soaking plate is provided to reach a curved portion continuous to a straight portion of the heat exchange tube mounted to the holding member in a curved manner, the holding portion is removed from a vicinity of an end portion of the soaking plate facing the curved portion, and the curved heat exchange tube can be brought into contact with the soaking plate;

the flat back surface of the soaking plate is adhered to the back surface of the radiation panel;

the radiation panel is provided with a plurality of sound absorption holes which are penetrated through along the thickness direction, and a non-combustible sheet is paved on the part of the radiation panel except the part provided with the soaking plate;

the noncombustible sheet is a ceramic sheet or a glass wool sheet, which is inserted into the cut-out part formed on the back surface of the two side edge parts of the soaking plate, the edge part is held, and the back surface of the holding member is painted into black;

an opening between the pair of bent portions is formed so as to be narrower than an inner diameter of the holding portion formed by the bent portions, and the heat exchanger tube is elastically deformable and fittable into the holding portion, and an outer diameter of the heat exchanger tube is larger than the inner diameter of the holding portion before the heat exchanger tube is attached to the holding portion, and the holding portion is also in close contact with a side surface of the heat exchanger tube when the heat exchanger tube contracts or expands during cooling or heating;

the holding portion elastically sandwiches a side surface of the heat exchanger tube from both sides in a state where the heat exchanger tube is attached to the holding portion.

2. Refrigeration and heating panel according to claim 1,

the heat exchange tube is a gas barrier tube, and the layer located on the inner peripheral surface is made of polyurethane, the layer located on the outer side thereof is made of ethylene-vinyl alcohol copolymer, and the layer located on the outer peripheral surface on the outer side thereof is made of polyurethane.

3. Refrigeration and heating panel according to claim 1,

the heat exchange tube is a gas barrier tube, and the inner peripheral layer is made of nylon, the outer layer is made of polyurethane, the outer layer is made of ethylene-vinyl alcohol copolymer, and the outer peripheral layer is made of polyurethane.