A building envelope heat transfer coefficient detection device

Abstract

The utility model relates to a kind of building enclosure heat transfer coefficient detection devices, involve heat transfer coefficient detection technical field.It includes detection box, the detection box is equipped with heat preservation box, the heat preservation box and detection box same side opening, the sidewall of the heat preservation box is provided with heat preservation layer, the heat preservation layer is flexible structure, the side of the heat preservation layer away from heat preservation box is connected with the sidewall of detection box, abutting mechanism is provided in the heat preservation box, and the abutting mechanism is abutted with heat preservation layer.The detection device in the utility model due to the existence of heat preservation layer, compared with directly with the hard enclosure peripheral adhesion of detection box, reduce the possibility of hot gas from detection box escape, reduce heat flow loss, to increase the accuracy of detection result.

Description

Technical Field

[0001] This utility model relates to the field of heat transfer coefficient testing, and in particular to a device for testing the heat transfer coefficient of building envelope. Background Technology

[0002] The heat transfer coefficient directly reflects the thermal insulation capacity of the building envelope (such as walls, roofs, doors, and windows). The test results can quantify the heat loss or heat gain of a building, providing a basis for calculating the overall energy consumption of the building.

[0003] Many current testing equipment uses the heat flow meter method. In order to meet the requirement that the temperature difference between the inner and outer surfaces should not be less than 10K (about 10 degrees Celsius), the heat flow meter is placed in an environmental heating chamber. However, this method cannot keep the indoor temperature stable and cannot eliminate the influence of the overall indoor environment.

[0004] Existing building envelope heat transfer coefficient testing devices consist of a testing chamber and a heater installed inside the chamber. When measuring the heat transfer coefficient of the building envelope, the operator places the testing chamber on the side wall of the building envelope and activates the heater. Simultaneously, temperature measurements are taken at test points on both sides of the envelope to complete the heat transfer coefficient test. However, in this testing process, some building envelope surfaces have irregular shapes, such as exterior walls and doors / windows. Due to aesthetic considerations, it is difficult to achieve a smooth surface. Therefore, when these building envelopes are fitted with the testing chamber, there are large gaps at the edges, resulting in heat loss within the testing chamber. This leads to a lower thermal resistance and a higher heat transfer coefficient, affecting the test results, and thus requires improvement. Utility Model Content

[0005] To address the issue of heat loss at the edge where the building envelope is in contact with the building envelope during the testing process, which leads to significant discrepancies in the heat transfer test results, this invention provides a building envelope heat transfer coefficient testing device.

[0006] The present invention provides a device for detecting the heat transfer coefficient of building envelope structures, which adopts the following technical solution:

[0007] A device for testing the heat transfer coefficient of a building envelope includes a testing chamber, an insulated box surrounding the testing chamber, the insulated box having an opening on the same side as the testing chamber, an insulation layer on the side wall of the insulated box having a flexible structure, the side of the insulation layer away from the insulated box being connected to the side wall of the testing chamber, and an abutting mechanism inside the insulated box abutting against the insulation layer.

[0008] By adopting the above technical solution, when the building envelope heat transfer coefficient testing device of this utility model is used, the operator attaches the testing box to the outer wall of the building envelope. Since the insulation layer is set between the insulation box and the testing box, the insulation layer is attached to the outer wall of the building envelope. When the heat transfer coefficient is tested, the inside of the testing box is heated. Due to the presence of the insulation layer, compared with directly attaching the testing box to the hard outer wall of the building envelope, the possibility of heat loss from the testing box is reduced, heat flow loss is reduced, and thus the accuracy of the test results is increased.

[0009] Optionally, the abutting mechanism includes an abutting plate, a connecting rod, an abutting spring, and an abutting rod. An abutting hole is provided on the bottom wall of the insulation box. The connecting rod is inserted into the abutting hole and is slidably connected to the abutting hole. The abutting plate is located at one end of the connecting rod and is situated on the side of the insulation box away from the detection chamber. The abutting spring is located at the end of the connecting rod away from the abutting plate, and the abutting rod is located at the end of the abutting spring away from the abutting plate. The abutting rod abuts against the insulation layer.

[0010] By adopting the above technical solution, the operator can push the abutment plate, causing the abutment plate to slide the connecting rod in the abutment hole, thereby causing the abutment rod to abut the insulation layer against the side wall of the building envelope. Under the action of the abutment spring, the abutment rod always abuts against the side wall of the insulation layer, further increasing the stability of the insulation layer when it abuts against the side wall of the building envelope.

[0011] Optionally, a constant temperature sleeve is provided on the side wall of the abutment plate, and the end of the constant temperature sleeve away from the abutment plate is connected to the outer side wall of the insulation box.

[0012] By adopting the above technical solution, the constant temperature sleeve is set between the abutment plate and the insulation box, which makes it difficult for external low-temperature gas to enter the insulation box through the abutment hole, further increasing the airtightness of the insulation box and thus increasing the accuracy of the test results.

[0013] Optionally, a fixing groove is provided on the side wall of the abutment plate, and a fixing ring is provided in the fixing groove. The thermostatic sleeve is connected to the side wall of the fixing ring. A connecting groove is provided on the outer side wall of the insulation box, and a connecting ring is inserted in the connecting groove. The end of the thermostatic sleeve away from the fixing ring is connected to the side wall of the connecting ring.

[0014] By adopting the above technical solution, the structure of the fixing ring and the fixing groove allows the operator to replace the constant temperature sleeve by removing the fixing ring from the fixing groove. Since the heat transfer coefficient testing device for the building envelope is often used in outdoor environments, the constant temperature sleeve is difficult to protect. If a gap appears in the constant temperature sleeve, heat in the insulation box will easily be lost. Therefore, the structure of the fixing ring and the connecting ring allows the constant temperature sleeve to be disassembled and replaced, thereby reducing the possibility that the constant temperature sleeve will be damaged during outdoor work, resulting in inaccurate heat transfer coefficient testing.

[0015] Optionally, the fixing ring includes a first fixing part and a second fixing part, the first fixing part and the second fixing part are hinged together, and a locking buckle for locking the first fixing part and the second fixing part is provided at one end of the first fixing part near the second fixing part; the connecting ring includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are hinged together, and a connecting buckle for locking the first connecting part and the second connecting part is provided at one end of the first connecting part near the second connecting part.

[0016] By adopting the above technical solution, the fixing ring and the connecting ring are locked by locking buckles and connecting buckles. At the same time, the fixing ring and the connecting ring can be opened by opening the locking buckles and the connecting buckles. Then, the fixing ring can be taken out from the fixing groove, or the connecting ring can be taken out from the connecting groove, thereby realizing the detachable connection between the connecting ring and the fixing ring and the side wall of the abutment plate.

[0017] Optionally, a fixing adhesive layer is provided at one end of the side wall of the thermostatic sleeve, and a connecting adhesive layer is provided at the other end. The fixing adhesive layer is fitted to the side wall of the fixing ring, and the connecting adhesive layer is fitted to the side wall of the connecting ring.

[0018] By adopting the above technical solution, the structure of the fixing adhesive layer and the connecting adhesive layer makes the thermostatic sleeve more airtight during the connection process with the fixing ring and the connecting ring, reducing the possibility of heat escaping from the gaps on both sides of the thermostatic sleeve.

[0019] Optionally, a metal sheet is provided on the side wall of the thermostatic sleeve. The metal sheet is located at the connection between the fixing adhesive layer and the connecting adhesive layer. The metal sheet is an elastic sheet and is bent in a direction away from the thermostatic sleeve.

[0020] By adopting the above technical solution and using the structure of an elastic metal sheet, the thermostatic sleeve is driven to expand outward by the metal sheet. As the abutment plate moves the connecting rod toward the detection box, the metal sheet always drives the thermostatic sleeve to expand outward, reducing the possibility of the thermostatic sleeve being clamped between the abutment plate and the insulation box, which could lead to damage to the thermostatic sleeve.

[0021] Optionally, an abutting adhesive layer is provided on the inner sidewall of the abutting hole, and the abutting adhesive layer abuts against the sidewall of the connecting rod.

[0022] By adopting the above technical solution, the structure of the abutting adhesive layer makes the sealing between the abutting hole and the connecting rod stronger, thereby increasing the airtightness between the abutting hole and the connecting rod. As a result, the heat in the constant temperature sleeve and the heat preservation box is not easily lost, further increasing the overall airtightness of the system.

[0023] In summary, this utility model has at least one of the following beneficial effects:

[0024] 1. When using the building envelope heat transfer coefficient testing device of this utility model, the operator attaches the testing chamber to the outer wall of the building envelope. Since the insulation layer is set between the insulation box and the testing chamber, the insulation layer is attached to the outer wall of the building envelope. When the heat transfer coefficient is tested, the inside of the testing chamber is heated. Due to the presence of the insulation layer, compared with directly attaching the testing chamber to the hard outer wall of the building envelope, the possibility of heat loss from the testing chamber is reduced, heat flow loss is reduced, and thus the accuracy of the test results is increased. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 This is a structural schematic diagram illustrating the connection relationship between the connecting rod and the abutment plate in an embodiment of this utility model;

[0027] Figure 3 This is a structural schematic diagram illustrating the connection relationship between the abutting adhesive layer and the connecting rod in an embodiment of this utility model;

[0028] Figure 4 This utility model Figure 1 An enlarged schematic diagram of part A in the middle;

[0029] In the diagram: 1. Testing chamber; 11. Insulation chamber; 12. Insulation layer; 13. Abutment mechanism; 14. Abutment plate; 15. Connecting rod; 16. Abutment spring; 17. Abutment rod; 18. Abutment hole; 2. Constant temperature sleeve; 3. Abutment adhesive layer; 4. Fixing plate; 41. Connecting plate; 42. Rotating knob; 43. Drive wheel; 44. Drive connecting rod; 45. Sliding rod. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below. Example 1

[0031] This utility model discloses a device for detecting the heat transfer coefficient of a building envelope. (Refer to...) Figure 1and Figure 2 A heat transfer coefficient testing device for building envelope includes a testing chamber 1 with an opening on one side for fitting against the side wall of the building envelope. A heating device is bolted inside the testing chamber 1, and an insulation box 11 is fitted over the outside of the testing chamber 1. A receiving rod is fixedly connected to the outer wall of the testing chamber 1 via a flange, with the end of the receiving rod away from the testing chamber 1 connected to the inner wall of the insulation box 11. When the heat transfer coefficient of a building envelope needs to be tested, the opening of the testing chamber 1 is fitted against the side wall of the building envelope to be tested. Then, the heating device inside the testing chamber 1 heats the surface. Several points inside the testing chamber 1 and several points inside the building envelope are selected to measure the temperature and determine the heat transfer coefficient of the building envelope.

[0032] Reference Figure 2 and Figure 3 A contact mechanism 13 is provided on the side of the insulation box 11 away from the building envelope. The contact mechanism 13 includes a contact plate 14, connecting rods 15, contact springs 16, and contact rods 17. The contact plate 14 is arranged parallel to the side wall of the insulation box 11 near the contact mechanism 13. Several connecting rods 15 are welded and fixed to the side wall of the contact plate 14 near the detection box 1. Several contact holes 18 are formed along the wall thickness direction on the side wall of the insulation box 11 near the contact plate 14. The number of contact holes 18 is the same as the number of connecting rods 15 and their positions correspond. The connecting rods 15 are inserted into the contact holes 18. A contact adhesive layer 3 is glued to the inner side wall of the contact hole 18, and the connecting rods 15 are slidably connected to the contact holes 18. The side wall of the contact rod 17 is fitted with the contact adhesive layer 3. The abutment spring 16 is welded and fixed to the end of the connecting rod 15 away from the abutment plate 14, and the abutment rod 17 is welded and fixed to the end of the abutment spring 16 away from the connecting rod 15. An insulation layer 12 is glued and fixed to the open side wall of the testing chamber 1. The insulation layer 12 is made of high-density polyethylene foam and is glued and fixed between the testing chamber 1 and the insulation box 11. The insulation layer 12 is also fitted to the abutment rod 17. When the abutment plate 14 moves towards the testing chamber 1, the abutment plate 14 drives the connecting rod 15 and the abutment rod 17 to press the insulation layer 12 against the side wall of the building envelope. This reduces the possibility of heat escaping from the testing chamber 1 through the gaps in the building envelope.

[0033] A fixing groove is provided on the side wall of the abutment plate 14, which is circumferentially oriented. A fixing ring is inserted into the fixing groove, which includes a first fixing part and a second fixing part. Both the first fixing part and the second fixing part are C-shaped frame structures. One end of the first fixing part and the second fixing part are hinged together, and the other end is fixedly installed with a locking buckle for locking the first fixing part and the second fixing part. A connecting groove is provided in an annular shape on the outer side wall of the insulation box 11, which includes a connecting part and a second connecting part. Both the first connecting part and the second connecting part are C-shaped frame structures. One end of the first connecting part and the second connecting part are hinged together, and the other end is installed with a connecting buckle for locking the first connecting part and the second connecting part. A constant temperature sleeve 2 is glued to the outer side wall of the fixing ring. The constant temperature sleeve 2 is a hollow polyethylene high-density foam product with two openings inside. The opening of the constant temperature sleeve 2 away from the fixing ring is glued to the outer side wall of the connecting ring. The thermostatic sleeve 2 has a fixing adhesive layer and a connecting adhesive layer glued to both ends. The fixing adhesive layer is glued along the circumference of the fixing ring, and the adhesive gap between the thermostatic sleeve 2 and the fixing ring is located between the fixing adhesive layer and the fixing ring. The connecting adhesive layer is also glued along the circumference of the fixing ring, and the adhesive gap between the thermostatic sleeve 2 and the connecting ring is located between the connecting adhesive layer and the fixing ring. The thermostatic sleeve 2 is used to allow hot air from inside the insulation box 11 to escape through the contact hole 18, further improving the overall insulation effect of the system.

[0034] A metal sheet is glued to the outer surface of the thermostatic sleeve 2. The metal sheet has a sheet-like structure and is elastic, and it is bent outwards towards the thermostatic sleeve 2. By adopting the structure of the elastic metal sheet, the thermostatic sleeve 2 is driven to expand outwards by the metal sheet. As the abutment plate 14 moves towards the detection box with the connecting rod 15, the metal sheet always drives the thermostatic sleeve 2 to expand outwards, reducing the possibility of the thermostatic sleeve 2 being clamped between the abutment plate 14 and the insulation box 11, which could lead to damage to the thermostatic sleeve 2.

[0035] The implementation principle of the heat transfer coefficient testing device for building envelope structure in Embodiment 1 of this utility model is as follows: When the operator needs to test the heat transfer coefficient of the building envelope structure, the opening of the testing box 1 can be set towards the building envelope. Then, the abutment plate 14 is pushed, so that the abutment plate 14 drives the abutment rod 17 to abut against the insulation layer 12, and the insulation layer 12 is abutted against the side wall of the building envelope, thereby increasing the insulation effect between the testing box 1 and the insulation box 11. Then, the temperature of the points in the testing box 1 and the points in the building envelope is measured, and the heat transfer coefficient is obtained. Compared with related technologies, the heat transfer coefficient testing device for building envelope structure in Embodiment 1 reduces the heat dissipation in the testing box 1 and increases the accuracy of the test results. Example 2

[0036] The difference between Example 2 and Example 1 is that:

[0037] Reference Figure 2 , Figure 3 and Figure 4 The thermostatic sleeve 2 is located between the fixed ring and the connecting ring, and both ends of the thermostatic sleeve 2 are respectively locked and abutted by the fixed ring and the connecting ring. The fixed ring includes four fixed pieces 4. A rotating knob 42 is provided on one side of the abutment plate 14. The rotating knob 42 is controlled to rotate by a motor. A drive wheel 43 is fixedly connected to the bottom of the rotating knob 42. A drive connecting rod 44 is movably connected to one end of the drive wheel 43. A rotating frame is welded and fixed to the side wall of the abutment plate 14 near the rotating knob 42. The fixed pieces 4 are fixedly connected to the rotating frame. A sliding rod 45 is arranged parallel to the fixed pieces 4 on the side wall of the rotating frame. A sliding collar is integrally formed at the end of the drive connecting rod 44 near the sliding rod 45, and the sliding collar is sleeved on the sliding rod 45. When the rotating knob 42 drives the drive wheel 43 to rotate, which in turn moves the drive linkage 44, as the angle between the drive wheel 43 and the drive linkage 44 gradually approaches 180 degrees, the drive wheel 43 pushes the drive linkage 44 out, causing the fixing piece 4 to detach from one end of the constant temperature sleeve 2. Similarly, the connecting ring includes four connecting pieces 41, and a rotating knob 42 is also provided on one side of the insulation box 11. The rotating knob 42 is controlled by a motor to rotate, and the bottom of the rotating knob 42 is fixedly connected to the drive wheel 43, which is movably connected to the drive linkage 44. A rotating frame is also welded and fixed on the side wall of the insulation box 11 near the connecting knob. A sliding rod 45 is arranged parallel to the fixing piece 4 on the side wall of the rotating frame. A sliding collar is also integrally formed on the end of the drive linkage 44 near the sliding rod 45, and the sliding collar is fitted onto the sliding rod 45. Both rotating knobs 42 can be controlled to rotate via external Bluetooth.

[0038] The implementation principle of the heat transfer coefficient testing device for building envelope in this utility model embodiment is as follows: When the testing device of this utility model is replacing the constant temperature sleeve, the operator drives a pair of rotating knobs to rotate via Bluetooth. During the rotation of the pair of rotating knobs, the angle between the knobs and the drive linkage gradually approaches 180 degrees. Then, the sliding sleeve moves on the sliding rod. At the same time, the height of the drive linkage relative to the rotating knobs changes, thereby pushing the fixing plate or connecting plate out from the side of the constant temperature sleeve, and thus replacing the constant temperature sleeve.

[0039] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A device for detecting the heat transfer coefficient of a building envelope, characterised in that: The device includes a detection chamber (1), which is covered by an insulated box (11). The insulated box (11) and the detection chamber (1) have openings on the same side. An insulation layer (12) is provided on the side wall of the insulated box (11). The insulation layer (12) is a flexible structure. The side of the insulation layer (12) away from the insulated box (11) is connected to the side wall of the detection chamber (1). An abutting mechanism (13) is provided inside the insulated box (11). The abutting mechanism (13) abuts against the insulation layer (12).

2. The building envelope heat transfer coefficient detection device according to claim 1, characterized in that: The abutting mechanism (13) includes an abutting plate (14), a connecting rod (15), an abutting spring (16), and an abutting rod (17). An abutting hole (18) is provided on the bottom wall of the insulation box (11). The connecting rod (15) is inserted into the abutting hole (18) and the connecting rod (15) is slidably connected to the abutting hole (18). The abutting plate (14) is located at one end of the connecting rod (15) and is located on the side of the insulation box (11) away from the detection box (1). The abutting spring (16) is located at the end of the connecting rod (15) away from the abutting plate (14). The abutting rod (17) is located at the end of the abutting spring (16) away from the abutting plate (14) and abuts against the insulation layer (12).

3. The apparatus for detecting the heat transfer coefficient of a building envelope according to claim 2, characterized in that: A thermostatic sleeve (2) is provided on the side wall of the abutment plate (14), and the end of the thermostatic sleeve (2) away from the abutment plate (14) is connected to the outer side wall of the insulation box (11).

4. The apparatus for detecting the heat transfer coefficient of a building envelope according to claim 3, characterized in that: A fixing groove is provided on the side wall of the abutment plate (14), and a fixing ring is provided in the fixing groove. The constant temperature sleeve (2) is connected to the side wall of the fixing ring. A connecting groove is provided on the outer side wall of the heat preservation box (11), and a connecting ring is inserted in the connecting groove. The end of the constant temperature sleeve (2) away from the fixing ring is connected to the side wall of the connecting ring.

5. A device for detecting the heat transfer coefficient of a building envelope according to claim 4, characterized in that: The fixing ring includes a first fixing part and a second fixing part, the first fixing part and the second fixing part are hinged together, and a locking buckle for locking the first fixing part and the second fixing part is provided at one end of the first fixing part near the second fixing part; the connecting ring includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are hinged together, and a connecting buckle for locking the first connecting part and the second connecting part is provided at one end of the first connecting part near the second connecting part.

6. The apparatus for detecting the heat transfer coefficient of a building envelope according to claim 3, characterized in that: The thermostatic sleeve (2) has a fixing adhesive layer at one end of its sidewall and a connecting adhesive layer at the other end. The fixing adhesive layer is attached to the sidewall of the fixing ring, and the connecting adhesive layer is attached to the sidewall of the connecting ring.

7. A device for detecting the heat transfer coefficient of a building envelope according to claim 6, characterized in that: A metal sheet is provided on the side wall of the thermostatic sleeve (2). The metal sheet is located at the connection between the fixing adhesive layer and the connecting adhesive layer. The metal sheet is an elastic sheet and is bent in a direction away from the thermostatic sleeve (2).

8. The building envelope heat transfer coefficient detection device according to claim 2, characterized in that: An abutting adhesive layer (3) is provided on the inner sidewall of the abutting hole (18), and the abutting adhesive layer (3) abuts against the sidewall of the connecting rod (15).

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