CN100557157C - Roof covering heat shading apparatus - Google Patents

Abstract

The invention discloses a kind of roof covering heat shading apparatus, comprise thermal insulation shade, controller and temperature pick up, described thermal insulation shade are arranged under building roofing and the roofing between the indoor space enclosing structure; Described temperature pick up lays respectively at indoor space enclosing structure surface under roofing soffit, the roofing, three positions of room air side, and the input of the equal access controller of all the sensors, and controller control drives the belt action; The expansion of described driving belt Access Control thermal insulation shade and the thermal insulation shade driving shaft of packing up.The present invention can effectively reduce by the indoor radiations heat energy of roofing layer turnover; And can control the expansion of thermal insulation shade and pack up according to the actual demand of indoor thermal environment, farthest improve indoor thermal environment, improve indoor thermal comfort.Be applicable to multiple roofing forms such as pitched roof (the furred ceiling layer is arranged or do not have the furred ceiling layer), flat roof deck (the furred ceiling layer is arranged or do not have the furred ceiling layer), double-layer ventilation roofing.

Description

Roof covering heat shading apparatus

Technical field

The present invention relates to a kind of heat-proof device, specifically is a kind of roof covering heat shading apparatus.

Background technology

Improving the heat-proof quality of roofing, be even more important to reducing summer and entering the indoor solar radiation heat of building by roofing, is important measures that improve indoor thermal environment.Roof heat insulation heat-insulating technique commonly used at present; be on the deck on roof, guarantee for a person given by a shopkeeper's temperature isolation layer repaves the roofing that waterproofing course and topping are constructed; but this roof structure is under summer comparatively hot weather conditions, and its heat-proof quality can not guarantee the indoor good thermal environment that reaches fully.

The heat-insulating capability in summer that utilizes the highly reflective material to improve roofing is a kind of new technical measures, be generally used for the double-layer ventilation roofing, attach one deck highly reflective material at upper strata roofing soffit, can reduce by roofing in summer and to be delivered to indoor solar radiation heat, but because of material layer is fixed, stopped on the contrary in the solar radiation heat inlet chamber when the low outdoor solar radiation of interior temperature is strong in the winter time, failed effectively to utilize this heat to improve interior temperature.

Summary of the invention

Defective at above-mentioned prior art, the invention provides a kind of roof covering heat shading apparatus, can be according to the radiant heat flux direction between indoor thermal environment demand and roofing and the indoor relative space enclosing structure to the expansion that is arranged on the thermal insulation shade under the roofing with pack up automatically and control, control reaches the purpose of improving indoor thermal environment by the indoor radiations heat energy of roofing turnover.This device is applicable to roofing forms such as pitched roof (the furred ceiling layer is arranged or do not have the furred ceiling layer), flat roof deck (the furred ceiling layer is arranged or do not have the furred ceiling layer), double-layer ventilation roofing.

In order to realize the foregoing invention purpose, roof covering heat shading apparatus of the present invention comprises thermal insulation shade, and controller and temperature pick up, described thermal insulation shade are arranged under building roofing and the roofing between the indoor space enclosing structure; Described temperature pick up lays respectively at indoor space enclosing structure surface under roofing soffit, the roofing, three positions of room air side, and the input of the equal access controller of all the sensors, and controller control drives the belt action; The expansion of described driving belt Access Control thermal insulation shade and the thermal insulation shade driving shaft of packing up.

Further, described thermal insulation shade can be collapsible thermal insulation shade, and the insulation board that is had certain degree of hardness by polylith is formed, soft connection between the different insulation boards; Described thermal insulation shade can also be the Scroll thermal insulation shade.

Above-mentioned thermal insulation shade is made by the low-launch-rate highly reflective material, should reach more than 0.8 for the thermal-radiating reflectivity of low temperature.During work, deployablely also can pack up, thermal insulation shade is arranged in parallel in roofing below certain distance during expansion.

For the screening thermal effect of roofing thermal insulation shade, the radiant heat flux direction under indoor thermal environment demand and roofing and the roofing between the indoor space enclosing structure is the decisive factor of two keys.For building, when the hot solar radiation of summer climate is strong, had a strong impact on indoor thermal environment by the solar radiation heat in the building roofing inlet chamber, weakening principle according to radiation heat transfer, arrange thermal insulation shade summer under roofing, can effectively reduce the radiations heat energy in the inlet chamber, improve indoor thermal environment; Outdoor in the winter time solar radiation is stronger, and room temperature is when low, is a kind of favorable factor by the solar radiation heat in the roofing inlet chamber for improving indoor thermal environment, and then on the contrary weakened by solar radiation heat roofing inlet chamber in as still arranging thermal insulation shade under roofing this moment; Except the typical case of solar radiation in summer in winter when strong, under climate conditions such as night, transition season, rainy weather, under roofing and the roofing between the indoor space enclosing structure if any temperature contrast, still have radiations heat energy indoor by roofing turnover, play favourable or adverse influence to indoor thermal environment.

Above-mentioned roof covering heat shading apparatus is in conjunction with above-mentioned principle, utilization is measured indoor air temperature at indoor layout temperature pick up, and relatively judge the indoor thermal environment situation with a reference value that sets in advance, again by relative indoor space enclosing structure surface arrangement temperature pick up under roofing soffit and roofing, two temperature are compared the direction of heat flow of judging by between roofing and the indoor relative space enclosing structure.Controller drives driving belt with controller according to radiant heat flux direction between the needs of indoor thermal environment and roofing and the indoor space enclosing structure by its inner driving mechanism, realize the expansion of thermal insulation shade and pack up, reach control by the indoor radiations heat energy of roofing turnover, and then improve the purpose of indoor thermal environment.

In sum, roof covering heat shading apparatus provided by the invention can effectively improve the architecture indoor thermal environment, reduces room conditioning or heating energy consumption, is a kind of efficient and roofing heat-proof device with adaptivity.

Description of drawings

Fig. 1 is the insulation board schematic diagram;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is a collapsible insulation board schematic diagram described in the embodiment;

Fig. 4 is the control principle figure that the present invention realizes;

Fig. 5 is the heat insulation schematic diagram of the collapsible thermal insulation shade of flat roof deck of band furred ceiling layer among the embodiment 1;

Fig. 6 is the heat insulation schematic diagram of the collapsible thermal insulation shade of the flat roof deck of no furred ceiling layer among the embodiment 2;

Fig. 7 is a kind of schematic diagram of Scroll thermal insulation shade.

1-upper surface 2-soffit 3-insulation board

Relative space enclosing structure surface temperature sensor under the 201-roofing underlaying surface temperature sensor 202-roofing

203-indoor air temperature sensor 204-controller

205-thermal insulation shade 501-thermal insulation shade driving shaft

502-drives belt

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples.

Thermal insulation shade is realized by following principle the effect that slackens of the radiation heat transfer between the indoor space enclosing structure relative under roofing and the roofing:

Basic principle according to radiation heat transfer in the thermal conduction study:, can adopt the method for between two radiating surfaces, arranging insulation board in order to reduce the radiation heat transfer between the two articles surface.So-called insulation board is meant to be arranged between two radiation heat transfer surfaces to weaken the thin plate of radiation heat transfer.

Below be to arrange between the parallel flat that an insulation board with low-launch-rate reduces the operating principle that two radiation heat transfers between the parallel flat are example explanation insulation board, the temperature of radiating surface and metal sheet, emissivity are supposed the emissivity of two flat boards as shown in Figure 1 ₁=ε ₂=0.8, the emissivity of insulation board ₃=0.2, then:

q ₁₃＝ε ₁₃(E _b1-E _b3) (1)

q ₃₂＝ε ₃₂(E _b3-E _b2) (2)

Q in the formula _1,3And q _3,2Be respectively the radiation heat transfer heat flow density of 1 pair of insulation board 3 of upper surface and 3 pairs of soffits 2 of insulation board.

System's emissivity of 3,2 two systems in surface 1,3 and surface is respectively:

${\mathrm{\ϵ}}_{13}=\frac{1}{\frac{1}{{\mathrm{\ϵ}}_1}+\frac{1}{{\mathrm{\ϵ}}_3}-1}=\frac{1}{\frac{1}{0.8}+\frac{1}{0.2}-1}=0.1905$

${\mathrm{\ϵ}}_{32}=\frac{1}{\frac{1}{{\mathrm{\ϵ}}_3}+\frac{1}{{\mathrm{\ϵ}}_2}-1}=\frac{1}{\frac{1}{0.2}+\frac{1}{0.8}-1}=0.1905$

Two system's emissivity equate that therefore ε is arranged ₁₃=ε ₃₂=ε _s=0.1905.

Under hot limit, q ₁₃=q ₃₂=q ₁₂, formula (1) and (2) addition are got:

${\mathrm{<figure-callout\; id="1"\; label="q"\; filenames="C20081003133400101.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="q"\; filenames="C20081003133400101.png"\; state="\{\{state\}\}">q</figure-callout>\; </figure-callout>}}_{\mathrm{1,2}}=\frac{1}{2}{\mathrm{\&epsiv;}}_s(E_{b1}-E_{b2})=0.09525(E_{b1}-E_{b2})$

When not arranging insulation board, the radiation heat transfer heat flow density of 1 pair of soffit 2 of upper surface is:

${\mathrm{<figure-callout\; id="1"\; label="q"\; filenames="C20081003133400101.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="q"\; filenames="C20081003133400101.png"\; state="\{\{state\}\}">q</figure-callout>\; </figure-callout>}}_{\mathrm{1,2}}={\mathrm{\&epsiv;}}_{12}(E_{b1}-E_{b2})$

$=\frac{1}{\frac{1}{{\mathrm{\&epsiv;}}_1}+\frac{1}{{\mathrm{\&epsiv;}}_2}-1}(E_{b1}-E_{b2})$

$=\frac{1}{\frac{1}{0.8}+\frac{1}{0.8}-1}(E_{b1}-E_{b2})$

$=0.6667(E_{b1}-E_{b2})$

Relatively have or not the radiation heat transfer heat flow density of arranging insulation board, show the radiation heat transfer of arranging 1 pair of soffit 2 of upper surface behind the insulation board when not arranging insulation board 1/7, radiation heat transfer reduces significantly.For making the effect that weakens radiation heat transfer more remarkable, in fact can adopt the lower material of emissivity to make insulation board.As being to arrange between two parallel surfaces of 0.8 that an emissivity is 0.05 insulation board in emissivity, then can make radiations heat energy be reduced to original 1/27.

Referring to Fig. 2, roofing underlaying surface temperature sensor 201 is arranged in the soffit of the superiors' roofing, under the roofing relative space enclosing structure surface temperature sensor 202 for different roofing arranged in form in different positions; For the flat roof deck or the pitched roof of no furred ceiling layer, then be arranged in indoor ground surface under the roofing; For flat roof deck that the furred ceiling layer is arranged or pitched roof, then be arranged in the upper surface of furred ceiling layer; For the double-layer ventilation roofing, then be arranged in the upper surface of lower floor's roofing.205 of collapsible thermal insulation shades are arranged in parallel in a distance, the superiors roofing below, and controller 204 expansion of collapsible thermal insulation shade 205 according to the signal controlling of temperature pick up 201,202 and 203 and packed up.

Referring to Fig. 3, Fig. 3 is the structural representation of the collapsible thermal insulation shade 205 of following embodiment employing.

Referring to Fig. 4, at first set two different indoor high temperature a reference value TH and low temperature a reference value TL, utilize temperature pick up continuously to measure the temperature of three measuring points then: relative space enclosing structure surface temperature T2 under room air temperature T0, roofing underlaying surface temperature T1, the roofing, and be converted into electric signal and pass to controller 204.Indoor air temperature T0 is compared with two indoor high temperature a reference value TH, low temperature a reference value TL, in order to judge that interior temperature is too high, it is low or moderate to cross, again relative space enclosing structure surface temperature T2 under roofing underlaying surface temperature T1 and the roofing is compared, judge the direction of transfer of the radiation heat transfer between this moment of two surfaces, when roofing underlaying surface temperature T1 is higher than the (T1＞T2) of relative space enclosing structure surface temperature T2 under the roofing, illustrate that then radiation heat transfer is to pass to indoor from roofing, otherwise on the contrary then.When the radiation heat transfer direction is to pass when indoor from roofing, as this moment interior temperature higher, then keep collapsible thermal insulation shade 205 to be in deployed condition by controller 204 action, as this moment interior temperature lower, then keep collapsible thermal insulation shade 205 to be in collapsed state by controller 204 actions; When the radiation heat transfer direction is from indoor biography during to roofing, as this moment interior temperature higher, then keep collapsible thermal insulation shade 205 to be in collapsed state by controller 204 action, as this moment interior temperature lower, then keep collapsible thermal insulation shade 205 to be in deployed condition by controller 204 actions; As this moment interior temperature moderate, it is constant then to keep collapsible thermal insulation shade to keep last state.

Embodiment 1, and the flat roof deck of band furred ceiling layer is heat insulation

Referring to Fig. 5, Fig. 5 is applied to the flat roof deck of furred ceiling layer schematic diagram when heat insulation for present embodiment, comprise among the figure: roofing underlaying surface temperature sensor 201, be positioned at relative space enclosing structure surface temperature sensor 202 under the roofing of furred ceiling layer upper surface, indoor air temperature sensor 203, the equal access controller 204 of the sensor of above-mentioned three positions, controller 204 receives temperature pick up 201,202 and 203 output signal, after signal is handled and is judged, make corresponding control instruction, drive driving belt 502 actions that are connected with controller 204 clutch ends by its internal drive mechanism, realize hiding the expansion of hot rolling curtains 205 or packing up by the thermal insulation shade driving shaft 501 that is connected with driving belt 502 at last; Wherein relative space enclosing structure surface temperature sensor is positioned at furred ceiling layer upper surface under the roofing.

The concrete course of work is: after temperature pick up 201,202,203, collapsible thermal insulation shade 205 and controller 204 deploy, at first set room air high temperature a reference value TH and low temperature a reference value TL (TH＞TL, TH and TL can be set at 27 ℃ and 20 ℃ respectively) by controller 204.As relative space enclosing structure surface temperature, indoor air temperature T0 under the roofing, and send controller 204 to by temperature pick up 201,202,203 METHOD FOR CONTINUOUS DETERMINATION roofing underlaying surface temperature T1, furred ceiling layer upper surface temperature T 2.In controller 204, indoor air temperature T0 and high temperature a reference value TH and low temperature a reference value TL are compared:

1) as the indoor air temperature T0 that records during greater than high temperature a reference value TH, illustrate indoor air temperature higher need the cooling, in controller 204, roofing underlaying surface temperature T1 and furred ceiling layer upper surface temperature T 2 are compared, the comparative result according to T1 and T2 carries out following operation afterwards:

1.,, drive belt 502 and rotate more than high M ℃ the time (M can be set to 1 ℃) than T2 as T1, drive thermal insulation shade driving shaft 501 and counterclockwise rotate, make collapsible thermal insulation shade 205 reach deployed condition by controller 204 actions.

2. when T1 lower more than M ℃ the time (M can be set to 1 ℃) than T2, by controller 204 actions, drive belt 502 and rotate, drive thermal insulation shade driving shaft 501 clockwise directions and rotate, make collapsible thermal insulation shade 205 reach collapsed state.

3. when T2-M≤T1≤T2+M (M can be set to 1 ℃), controller 204 is failure to actuate, and keeps collapsible thermal insulation shade 205 to keep current state.

2) as the indoor air temperature T0 that records during less than low temperature a reference value TL, illustrate that indoor air temperature on the low side needs heat up, in controller 204, roofing underlaying surface temperature T1 and furred ceiling layer upper surface temperature T 2 are compared, the comparative result according to T1 and T2 carries out following operation afterwards:

1.,, drive belt 502 and rotate more than high M ℃ the time (M can be set to 1 ℃) than T2 as T1, drive thermal insulation shade driving shaft 501 clockwise directions and rotate, make collapsible thermal insulation shade 205 reach collapsed state by controller 204 actions.

2. when T1 lower more than M ℃ the time (M can be set to 1 ℃) than T2, by controller 204 actions, drive spool belt 502, drive thermal insulation shade driving shaft 501 and counterclockwise rotate, make collapsible thermal insulation shade 205 reach deployed condition.

3. when T2-M≤T1≤T2+M (M can be set to 1 ℃), controller 204 is failure to actuate, and keeps collapsible thermal insulation shade 205 to keep current state.

3) when the indoor air temperature T0 that records between high temperature a reference value TH and low temperature a reference value TL, promptly during TL≤T0≤TH, illustrate that indoor air temperature is moderate, controller 204 is failure to actuate, and makes collapsible thermal insulation shade 205 keep current state.

By controller action, make that collapsible thermal insulation shade is finished corresponding operating after, then continuous measurement temperature T 0, T1 and T2 continue next operation as required.

Embodiment 2: the flat roof deck of no furred ceiling layer is heat insulation

Referring to Fig. 6, for present embodiment is applied to not have the flat roof deck of the furred ceiling layer schematic diagram when heat insulation, comprise among the figure: roofing underlaying surface temperature sensor 201, be positioned at relative space enclosing structure surface temperature sensor 202 under the roofing of indoor ground surface, indoor air temperature sensor 203, controller 204, collapsible thermal insulation shade 205, thermal insulation shade driving shaft 501 drives belt 502; Structure, principle are all consistent with embodiment 1, but wherein under the roofing relative space enclosing structure surface temperature sensor be positioned at indoor ground surface.

Referring to Fig. 7, the thermal insulation shade among above-mentioned two embodiment can adopt the Scroll thermal insulation shade to replace above-mentioned collapsible thermal insulation shade.

Claims (4)

1, a kind of roof covering heat shading apparatus, it is characterized in that, comprise and be arranged on the thermal insulation shade between the indoor space enclosing structure under building roofing and the roofing, controller and temperature pick up, described temperature pick up lays respectively at the roofing soffit, indoor space enclosing structure surface under the roofing, three positions of room air side, measure room air temperature T0 respectively, roofing underlaying surface temperature T1, relative space enclosing structure surface temperature T2 under the roofing, and the input of the equal access controller of all the sensors, set two different indoor high temperature a reference value TH and low temperature a reference value TL in the controller, the output of controller connects the driving belt, drives the expansion of belt Access Control thermal insulation shade and the thermal insulation shade driving shaft of packing up at last; And:

T0＞TH and T1＞T2+M; Perhaps when T0＜TL and T1＜T2-M, drive the spool belt, drive and hide the hot rolling curtain reel and rotate, roller shutter launches;

TL≤T0≤TH or T2-M≤T1≤T2+M, spool does not rotate, and keeps hiding hot rolling curtain current state;

T0＞TH and T1＜T2-M; Perhaps when T0＜TL and T1＞T2+M, drive the spool belt, drive and hide the hot rolling curtain reel and rotate, roller shutter is packed up;

Wherein M is the temperature value of setting.

According to the described roof covering heat shading apparatus of claim 1, it is characterized in that 2, described thermal insulation shade is collapsible thermal insulation shade, the insulation board that is had certain degree of hardness by polylith is formed, soft connection between the different insulation boards.

According to the described roof covering heat shading apparatus of claim 1, it is characterized in that 3, described thermal insulation shade is the Scroll thermal insulation shade.

According to the described roof covering heat shading apparatus of one of claim 1-3, it is characterized in that 4, described thermal insulation shade is made by the low-launch-rate highly reflective material, reach more than 0.8 for the thermal-radiating reflectivity of low temperature.

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