A thermohygrometric test device for mold growth on the surface of building materials

Abstract

The invention discloses a thermohygrometry test device for mold growth on the surface of building materials, which relates to the technical field of material testing devices, and includes at least one curing component; at least one temperature component, the temperature component includes a constant temperature box, and the curing box body is located in the constant temperature box to obtain the air temperature in the constant temperature box; at least one humidity component, the humidity component includes a constant temperature water bath and a saturated air bottle placed in the constant temperature water bath, the saturated air bottle is connected with an air inlet pipe and an air outlet pipe, the air inlet pipe is connected to the outside, and the air outlet pipe is connected to the curing box to adjust the air humidity in the curing box; and a monitoring component, the monitoring component includes a camera, a temperature and humidity probe, a multi-channel data acquisition device and a computer, the camera is installed in the curing box to collect the mold growth on the surface of the specimen, and the temperature and humidity probe is installed in the curing box to collect the temperature and humidity inside the curing box. The invention can carry out the test of the relationship between mold growth and thermal and humidity environment of the specimen.

Description

Technical Field

[0001] The invention relates to the technical field of material testing devices, in particular to a thermohygroscopic testing device for mold growth on the surface of building materials. Background Art

[0002] The problem of mold growth in buildings is widespread, which not only causes corrosion of building materials and structures, but also endangers the health of indoor occupants. As people's requirements for the quality of living environment and the durability of buildings increase, the issue of controlling mold growth in buildings has received increasing attention. Among them, mold prevention technology for building materials is the foundation.

[0003] Mold growth is affected by the nutrients of the matrix (water, sugars, inorganic salts) and pH value, as well as the ambient temperature, humidity and oxygen, and requires a certain amount of time for spore germination and mycelium growth. Existing countermeasures mainly focus on the matrix, that is, using material antiseptic methods to treat the materials. However, for commonly used building materials, the effects achieved by common treatment methods such as soaking, boiling, and high-pressure injection can often only last for a period of time, and will cause additional environmental problems and health risks. Even if the material matrix is ​​temporarily not moldy through anti-mold treatment, during the long-term use of the building, dust pollution and volatilization of human sweat will also cause the shallow area of ​​the material (0-3mm) to have the conditions for mold growth again.

[0004] With the development of building physics technology, people can use computer tools to more and more accurately judge the dynamic thermal and humid conditions of the building environment and even the building structure under certain working conditions. Based on this, the method of controlling the thermal and humid conditions of the environment, inhibiting the activity of mold, and thus preventing the mold of building materials has gradually become an emerging technology hotspot. The accurate description of the quantitative relationship between mold growth, thermal and humid environment, and time is the basic premise for the application of this method. This relationship can be characterized by the mold growth rate corresponding to a certain temperature and humidity.

[0005] The relationship between mold growth rate and heat and humidity environment of building materials is an indispensable basic parameter, but it is difficult to carry out this material parameter test at present. The existing test scheme, equipment and manpower costs are high and difficult to popularize.

[0006] On the one hand, it is difficult to accurately create a high-humidity curing environment. Mold growth tests need to be conducted under high relative humidity conditions. Ordinary constant temperature and humidity chambers cannot provide accurate relative humidity in high humidity areas (>85%). Although the method of using saturated salt solution can meet the relative humidity control accuracy, it requires a completely closed curing environment, which will lead to a lack of oxygen supplementation and interfere with mold growth. For the creation of a temperature and humidity curing environment, equipment such as a constant temperature and humidity chamber is used to control temperature and humidity at the same time, and the technical cost is very high.

[0007] On the other hand, the existing testing scheme has high labor costs. For material samples with low nutrient content, or working conditions with low temperature and humidity, mold grows slowly, and it may take up to several months to complete the test. In this process, the traditional manual recording method is costly, and the maintenance environment is often opened for filming and data recording, which can easily cause environmental disturbances and reduce the accuracy and stability of the test results. Summary of the invention

[0008] The present invention aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, an embodiment of the present invention provides a thermohygroscopic test device for mold growth on the surface of building materials to test the relationship between mold growth and thermohygroscopic environment of a specimen.

[0009] The thermohygrometric testing device for mold growth on the surface of building materials according to an embodiment of the present invention comprises at least one curing component, wherein the curing component comprises a curing box for placing a test piece; at least one temperature component, wherein the temperature component comprises a constant temperature box, wherein the curing box body is located in the constant temperature box to obtain the air temperature in the constant temperature box; and at least one humidity component, wherein the humidity component comprises a constant temperature water bath and a saturated air bottle placed in the constant temperature water bath, wherein the saturated air bottle is connected to an air inlet pipe and an air outlet pipe, wherein the air inlet pipe is connected to the outside, and the air outlet pipe is connected to the curing box to obtain the air temperature in the constant temperature box. Regulating the air humidity in the curing box; and a monitoring component, the monitoring component including a camera, a temperature and humidity probe, a multi-channel data collector and a computer, the camera being installed in the curing box to collect the mold growth on the surface of the specimen, the temperature and humidity probe being installed in the curing box to collect the temperature and humidity inside the curing box, the camera and the temperature and humidity probe being electrically connected to the multi-channel data collector respectively to obtain shooting data and temperature and humidity data, and the computer being electrically connected to the multi-channel data collector to characterize the shooting data and temperature and humidity data.

[0010] In an optional or preferred embodiment, the curing assembly further includes a box cover disposed on the top of the curing box and at least one specimen holder located in the curing box.

[0011] In an optional or preferred embodiment, the camera is fixed at the center of the inner side of the box cover so that the shooting range covers the specimen in the curing box, and the angle between the line connecting the midpoint of the camera lens and the outer edge of the specimen and the perpendicular line of the center of the camera lens does not exceed 45°.

[0012] In an optional or preferred embodiment, the box cover is provided with a light-transmitting window to serve as a light-transmitting passage, and the light-transmitting window is provided with a probe interface for installing the camera.

[0013] In an optional or preferred embodiment, the temperature and humidity probe is arranged on the specimen holder, the temperature detection accuracy of the temperature and humidity probe is T±0.2°C, and the relative humidity detection accuracy of the temperature and humidity probe is RH±2.0%.

[0014] In an optional or preferred embodiment, the box cover is hinged to the upper edge of the side wall of the curing box, and a plurality of sealing locks are installed between the box cover and the curing box.

[0015] In an optional or preferred embodiment, the constant temperature water bath has an air bottle insertion cavity for inserting a saturated air bottle.

[0016] In an optional or preferred embodiment, the air outlet pipe is wrapped with a heat-insulating layer to insulate the air in the air outlet pipe.

[0017] In an optional or preferred embodiment, the air intake pipe is provided with an air intake filter and an air flow meter, the maintenance box is connected to an exhaust pipe, and the exhaust pipe is provided with an exhaust filter.

[0018] In an optional or preferred embodiment, one temperature component is provided, and each of the maintenance components is arranged in a constant temperature box in the temperature component.

[0019] Based on the above technical scheme, the embodiment of the present invention has at least the following beneficial effects: the above technical scheme ensures the temperature of the specimen in the curing box by designing a constant temperature box, obtains saturated air and outputs it into the curing box by inletting air into the saturated air bottle in the constant temperature water bath, and uses the basic principle that when the absolute humidity is constant, the relative humidity and temperature are inversely proportional to each other to control the saturated air temperature in the constant temperature water bath and the air temperature in the constant temperature box, and obtains a specific temperature and humidity gradient in the curing box for testing the relationship between mold growth of the specimen and the hot and humid environment; and uses a camera to collect the mold growth on the surface of the specimen, and uses a temperature and humidity probe to collect the temperature and humidity inside the curing box, which is finally summarized by a multi-channel data collector and stored and visualized by a computer. The present invention can effectively solve the problem that it is difficult to accurately create a high humidity environment in the test of mold growth properties of building materials, and the labor cost of data recording is high. The device has the characteristics of low cost, high precision, strong flexibility, and high degree of automation. The components of the device can be assembled and flexibly adjusted according to needs, and has good application prospects in the research and application of mold growth in building materials that are increasingly valued. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 is a perspective view of an embodiment of the present invention;

[0022] Figure 2is a perspective view of another viewing angle of an embodiment of the present invention;

[0023] Figure 3 is an exploded view of the maintenance assembly in an embodiment of the present invention;

[0024] Figure 4 is an exploded view of the humidity assembly in an embodiment of the present invention.

[0025] Figure numerals: curing component 10, curing box 11, box cover 12, light-transmitting window 13, sealing lock 14, specimen holder 15, temperature component 20, constant temperature box 21, humidity component 30, constant temperature water bath 31, air bottle insertion cavity 32, water temperature control panel 33, air inlet pipe 34, air inlet filter 35, air flow meter 36, saturated air bottle 37, air outlet pipe 38, insulation layer 39, monitoring component 40, computer 41, multi-channel data acquisition device 42, data cable 43, camera 44, temperature and humidity probe 45, specimen 51, exhaust pipe 61, exhaust filter 62. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Embodiment 1

[0031] Reference Figures 1 to 4 A thermohygrometric testing device for mold growth on the surface of building materials includes at least one maintenance component 10, at least one temperature component 20, at least one humidity component 30 and a monitoring component 40.

[0032] The curing assembly includes a curing box 11 for placing the test piece 51. The temperature assembly 20 includes a constant temperature box 21, and the curing box body is located in the constant temperature box 21 to obtain the air temperature in the constant temperature box 21. The humidity assembly 30 includes a constant temperature water bath 31 and a saturated air bottle 37 placed in the constant temperature water bath 31, and the saturated air bottle 37 is connected to an air inlet pipe 34 and an air outlet pipe 38, the air inlet pipe 34 is connected to the outside, and the air outlet pipe 38 is connected to the curing box 11, so as to adjust the air humidity in the curing box 11.

[0033] It can be understood that the air temperature T in the curing box 11 is obtained by setting the constant temperature box 21; the relative humidity RH in the curing box 11 is obtained by adjusting both the saturated air temperature in the constant temperature water bath 31 and the air temperature in the constant temperature box 21. The adjustment range of the air temperature T and the relative humidity RH should be able to cover the range of T = 10-40°C, RH = 70%-100%.

[0034] The above technical scheme ensures the temperature of the test piece 51 in the curing box 11 by designing a constant temperature box 21, obtains saturated air by taking in air from a saturated air bottle 37 in a constant temperature water bath 31, and outputs the saturated air to the curing box 11. At the same time, the basic principle that when the absolute humidity is constant, the relative humidity and temperature are inversely proportional is used to control the saturated air temperature in the constant temperature water bath 31 and the air temperature in the constant temperature box 21, so as to obtain a specific temperature and humidity gradient in the curing box 11 for conducting a test on the relationship between the mold growth of the test piece and the thermal and humid environment.

[0035] The monitoring component 40 includes a camera 44, a temperature and humidity probe 45, a multi-channel data collector 42 and a computer 41. The camera 44 is installed in the curing box 11 to collect the mold growth on the surface of the test piece 51. The temperature and humidity probe 45 is installed in the curing box 11 to collect the temperature and humidity inside the curing box 11. The camera 44 and the temperature and humidity probe 45 are respectively electrically connected to the multi-channel data collector 42 to obtain the shooting data and the temperature and humidity data. The computer 41 is electrically connected to the multi-channel data collector 42 to characterize the shooting data and the temperature and humidity data. The present invention uses the camera 44 to collect the mold growth on the surface of the test piece 51, and uses the temperature and humidity probe 45 to collect the temperature and humidity inside the curing box 11. The multi-channel data collector 42 finally summarizes it, and stores and visualizes it through the computer 41. The present invention can effectively solve the problem that the high humidity environment is difficult to accurately create in the test of mold growth properties of building materials, and the labor cost of data recording is high. The device has the characteristics of low cost, high precision, strong flexibility and high degree of automation. Preferably, the monitoring time of the monitoring component 40 is in hours, and the data collection time step is preferably a multiple or factor of 24, such as 48h / 24h / 12h / 6h / 3h / 1h.

[0036] like Figure 3 As shown, specifically, the curing assembly 10 further includes a box cover 12 disposed on the top of the curing box 11 and at least one specimen holder 15 located in the curing box 11, on which a plurality of specimens 51 can be placed, and further, the box cover 12 is hinged to the upper edge of the side wall of the curing box 11 to facilitate opening and closing the box cover 12, and a plurality of sealing locks 14 are installed between the box cover 12 and the curing box 11. The box cover 12 is provided with a light-transmitting window 13 to serve as a light-transmitting passage.

[0037] The temperature and humidity probe 45 is arranged on the specimen holder 15, specifically protruding from the upper surface of the center position of the specimen holder 15, wherein the temperature and humidity probe 45 adopts a high-precision probe, and the temperature detection accuracy of the temperature and humidity probe 45 is T±0.2°C, and the relative humidity detection accuracy of the temperature and humidity probe 45 is RH±2.0%, thereby collecting the temperature and humidity inside the curing box 11 and transmitting them to the multi-channel data collector 42 through the data line 43.

[0038] The camera 44 is fixed at the center of the inner side of the box cover 12 so that the shooting range covers the test piece 51 in the curing box. The light-transmitting window 13 is provided with a probe interface for the camera 44 to be installed. The accuracy of the camera is not less than HD1080P. The angle between the line connecting the midpoint of the lens of the camera 44 and the outer edge of the test piece 51 and the vertical line of the center of the lens of the camera 44 does not exceed 45°. Through this solution, it can be ensured that the shooting range of the camera 33 can cover all test pieces 51. The camera 44 and the temperature and humidity probe 45 have anti-condensation functions.

[0039] The interface of the multi-channel data collector 42 is 60-way. The multi-channel data collector 43 is connected to the computer 41 through a data line 43. The data collection time, step length, etc. are controlled by computer instructions, and the data are summarized, stored and visualized on the computer 41; the data collection time step is set to 12h, and records are recorded twice a day, corresponding to day and night.

[0040] like Figure 4 The constant temperature water bath 31 has an air bottle insertion cavity 32 for inserting a saturated air bottle 37. The air outlet pipe 38 is wrapped with a heat preservation layer 39 to keep the air in the air outlet pipe 38 warm, and the heat preservation layer is preferably made of flexible material.

[0041] Preferably, the air intake pipe 34 is provided with an air intake filter 35 and an air flow meter 36 , the curing box 11 is connected with an exhaust pipe 61 , and the exhaust pipe 61 is provided with an exhaust filter 62 .

[0042] In this embodiment, six curing components 10 are provided, namely, six curing boxes 11, and one temperature component is provided, namely, one constant temperature box 21 is provided. Each curing component 10 is arranged in the constant temperature box 21 in the temperature component 20. Six humidity components 30 are provided, namely, six constant temperature water bath boxes 31 and six saturated air bottles 37. In this embodiment, the curing components 10, the temperature components 20, the humidity components 30 and the monitoring components 40 are arranged horizontally or in a box, such as Figure 1 and Figure 2 As shown, this embodiment has a total of one set of test gradients of air temperature T and six sets of test gradients of relative humidity RH.

[0043] The specific air intake sequence is: air intake pipe 34 , air intake filter 35 , air flow meter 36 , saturated air bottle 37 , air outlet pipe 38 , curing box 11 , test piece 51 , exhaust filter 62 and exhaust pipe 61 .

[0044] In this embodiment, one set of air temperature T and six sets of relative humidity RH, a total of six sets of combined temperature and humidity conditions of air temperature T & relative humidity RH, can be created simultaneously for specimen curing. A self-assembled box-type curing box is used, and the box cover 12 can be opened and closed, with a reserved interface for connecting to the air outlet pipe 38 of the humidity component 30, and an interface for connecting to the components in the monitoring component 40. The specific dimensions of the curing box 11 are: length × width × height = 600mm × 600mm × 400mm; the curing box 11 is enclosed by stainless steel material, and the top box cover 12 is provided with a light-transmitting window 13 as a light-transmitting channel, and the dimensions of the light-transmitting window are: length × width = 400mm × 400mm; a specimen holder 15 is placed at the bottom of the curing box 11, with a height of 5cm.

[0045] The components of the test device in the present invention can be assembled and flexibly adjusted as needed, and have good application prospects in the research and application of mold growth in building materials, which is increasingly valued. The number of saturated air bottles, constant temperature water baths, and curing boxes can be adjusted according to the number of gradients of air temperature T & relative humidity RH that need to be measured simultaneously; the curing box can be other sealable and openable containers, and the size can be adjusted according to the number of test pieces that need to be measured. The camera and temperature and humidity probe used for monitoring by the monitoring component 40 can use other models of cameras and temperature and humidity probes while ensuring accuracy. The data collection end module can use other models of tools according to the needs of data collection and processing; the multi-channel data collector can select the appropriate interface capacity according to the needs; the data collection time step can select other lengths, but it is advisable to use 24h as the base and select its multiples or factors.

[0046] Embodiment 2

[0047] The difference between this embodiment and the first embodiment is that:

[0048] In this embodiment, six curing components 10 are provided, that is, six curing boxes 11; two temperature components are provided, that is, two constant temperature boxes 21 are provided, and the constant temperature boxes adopt a vertical multi-layer structure, and every three curing boxes 11 are placed in one constant temperature box 21. Six humidity components 30 are provided, and a multi-layer arrangement is also adopted to save floor space, and each saturated air bottle 37 is placed in a corresponding constant temperature water bath box 31. In this embodiment, the curing components 10, the temperature components 20, the humidity components 30 and the monitoring components 40 are arranged vertically or in a cabinet.

[0049] In this embodiment, two sets of air temperature T and three sets of relative humidity RH can be simultaneously created, a total of six sets of combined temperature and humidity conditions of air temperature T & relative humidity RH, for specimen maintenance. The adjustment range of air temperature T and relative humidity RH can cover the range of T = 10-40 ° C, RH = 70% -100%, with an accuracy of T ± 0.2 ° C, RH ± 2.0%.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A thermohygrometric test device for mold growth on the surface of building materials, characterized by: include At least one curing assembly, the curing assembly comprising a curing box for placing the test piece; at least one temperature component, the temperature component comprising a thermostatic box, the curing box being located in the thermostatic box to obtain the air temperature in the thermostatic box; At least one humidity component, the humidity component comprising a constant temperature water bath and a saturated air bottle placed in the constant temperature water bath, the saturated air bottle being connected to an air inlet pipe and an air outlet pipe, the air inlet pipe being connected to the outside, and the air outlet pipe being connected to the curing box, so as to adjust the air humidity in the curing box; as well as A monitoring component, the monitoring component includes a camera, a temperature and humidity probe, a multi-channel data collector and a computer, the camera is installed in the curing box to collect the mold growth on the surface of the test piece, the temperature and humidity probe is installed in the curing box to collect the temperature and humidity inside the curing box, the camera and the temperature and humidity probe are electrically connected to the multi-channel data collector respectively to obtain shooting data and temperature and humidity data, and the computer is electrically connected to the multi-channel data collector to characterize the shooting data and temperature and humidity data; The curing assembly further comprises a box cover arranged on the top of the curing box and at least one specimen support located in the curing box; the camera is fixed at the center of the inner side of the box cover so that the shooting range covers the specimen in the curing box, and the angle between the line connecting the midpoint of the camera lens and the outer edge of the specimen and the vertical line of the center of the camera lens does not exceed 45°; The air outlet pipe is wrapped with a heat-insulating layer to keep the air in the air outlet pipe warm; The air intake pipe is provided with an air intake filter and an air flow meter, the maintenance box is connected with an exhaust pipe, and the exhaust pipe is provided with an exhaust filter.

2. The thermohygroscopic testing device for mold growth on the surface of building materials according to claim 1, characterized in that: The box cover is provided with a light-transmitting window to serve as a light-transmitting passage, and the light-transmitting window is provided with a probe interface for installing the camera.

3. The thermohygroscopic testing device for mold growth on the surface of building materials according to claim 1, characterized in that: The temperature and humidity probe is arranged on the specimen support, the temperature detection accuracy of the temperature and humidity probe is T±0.2°C, and the relative humidity detection accuracy of the temperature and humidity probe is RH±2.0%.

4. The thermohygroscopic testing device for mold growth on the surface of building materials according to claim 1, characterized in that: The box cover is hinged to the upper edge of the side wall of the curing box, and a plurality of sealing locks are installed between the box cover and the curing box.

5. The thermohygrometry testing device for mold growth on the surface of building materials according to any one of claims 1 to 4, characterized in that: The constant temperature water bath box is provided with an air bottle placement cavity for placing a saturated air bottle.

6. The thermohygrometry testing device for mold growth on the surface of building materials according to any one of claims 1 to 4, characterized in that: One temperature component is provided, and each maintenance component is arranged in a constant temperature box in the temperature component.

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