Temperature control test box

Abstract

The utility model discloses a temperature control test box which comprises a box body and a water bath arranged in the box body, an opening of the water bath is matched with a cover body, and the cover body is sequentially provided with a sealing contact layer, a temperature control layer and a temperature control layer from the side of the water bath to the outside, and the sealing contact layer is composed of silicon rubber embedded with a shape memory alloy spring net and directly makes contact with liquid or steam in the water bath; the dynamic compensation layer comprises a composite material of temperature-sensitive hydrogel and sodium polyacrylate; the humidity adjusting layer is composed of a porous ceramic fiber layer and a lithium chloride moisture absorbent loaded in pores of the porous ceramic fiber layer, and the humidity adjusting layer completely wraps the interior of the cover body and is physically isolated from the electronic elements and the metal connecting pieces in the cover body; and after water vapor penetrates through the sealing contact layer and the dynamic compensation layer, residual water molecules are captured by the lithium chloride moisture absorbent so as to reduce the humidity reaching components in the cover body. According to the temperature control test box, through the synergistic effect of the shape memory alloy spring net and the temperature-sensitive hydrogel, the sealing performance can be automatically adjusted according to the temperature change, it is ensured that the good sealing effect can be kept under different temperature conditions, liquid or steam is effectively prevented from leaking from the water bath, and the stability and safety of the test environment are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a temperature control test box especially. BACKGROUND

[0002] With the development of the industry and the improvement of consumer demand, raw material merchants pay more and more attention to the naturalness, safety and effectiveness of raw materials. For example, in the development of cosmetic raw materials, plant extracts are widely concerned because of their natural and safe characteristics. However, the composition and efficacy target of plant extracts are often not clear enough, which brings challenges to their application in raw material development. The application of temperature control test box in raw material development can help raw material merchants better control experimental conditions and improve the development efficiency and quality of raw materials. The existing temperature control test box mainly forms a sealing system by adding a sealing ring, but this sealing system has the following technical pain points:

[0003] 1. The physical properties of the existing sealing ring material will gradually decrease when it faces a large temperature difference from 25℃ to 95℃. For example, rubber sealing materials will accelerate aging in a high-temperature environment, resulting in reduced elasticity and inability to tightly fit the sealing surface, which greatly reduces the sealing effect;

[0004] 2. Water vapor condenses into water droplets on the surface of the sealing ring and the cover, forming a water film channel. During the use of the water bath box, water in the water tank may splash onto the surface of the sealing ring and the cover due to stirring, fluctuation and other reasons, accelerating the formation of the water film and further increasing the risk of water hydrolysis of other materials in the cover. INVENTION CONTENTS

[0005] The utility model aims at least to solve one of the technical problems existing in the prior art. To this end, the utility model provides a temperature control test box.

[0006] In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme:

[0007] A temperature control test box, comprising a box body and a water bath tank opened in the box body, the opening of the water bath tank is matched with a cover, and a sealing contact layer is sequentially arranged from the side of the water bath tank to the outside, which is composed of silicon rubber embedded with shape memory alloy spring net, directly contacting the liquid or steam in the water bath tank; a dynamic compensation layer containing a composite material of temperature-sensitive hydrogel and sodium polyacrylate; a humidity adjusting layer composed of a porous ceramic fiber layer and a lithium chloride moisture absorbent loaded in the pores thereof, the humidity adjusting layer is completely covered inside the cover, and the electronic components and metal connectors inside the cover are physically isolated; when the water vapor penetrates through the sealing contact layer and the dynamic compensation layer, the residual water molecules are captured by the lithium chloride moisture absorbent to reduce the humidity of the internal components of the cover.

[0008] Preferably, the shape memory alloy spring net is a nickel-titanium alloy with an austenite phase transformation end temperature Af of 22-28 DEG C and a mesh density of 20-30 meshes / cm2.

[0009] Preferably, the temperature-sensitive hydrogel is a PNIPAM-co-AAc copolymer with a lower critical solution temperature LCST of 32 DEG C ± 2 DEG C.

[0010] Preferably, the porous ceramic fiber layer has a pore size of 15-40 mu m, a porosity of > 85%, and a lithium chloride hygroscopic agent loading of 65-75% of the pore volume.

[0011] Preferably, the cover further comprises an opening mechanism comprising a semispherical avoiding groove formed on the outer surface of the cover, a horizontal handle spanning the semispherical avoiding groove, and two ends of the horizontal handle being fixed to the groove edges of the semispherical avoiding groove by anti-loosening bolts.

[0012] The beneficial effects of the present application are:

[0013] The temperature control test box of the present application can automatically adjust the sealing performance according to temperature changes through the synergistic effect of the shape memory alloy spring net and the temperature-sensitive hydrogel, ensures good sealing effect under different temperature conditions, effectively prevents liquid or steam from leaking from the water bath tank, and guarantees the stability and safety of the test environment. The lithium chloride hygroscopic agent in the humidity adjusting layer can capture residual water molecules that penetrate the sealing layer, reduce the humidity of the internal components of the cover, prevent the electronic components and metal connecting components inside the cover from being damaged by moisture, and prolong the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 Structure diagram of a temperature control test box of the present application Figure One ;

[0016] Figure 2 Structure diagram of a temperature control test box of the present application Figure Two . DETAILED DESCRIPTION

[0017] Embodiments of the present application will be described in detail below, and the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout.

[0018] The orientation shown in the drawings should not be understood as limiting the specific protection scope of the present application, and is only for the reference understanding of the preferred embodiments, and the position of the product components shown in the drawings can be changed or the number can be increased or the structure can be simplified.

[0019] The "connection" described in the specification and the components shown in the drawings "connected" with each other can be understood as fixedly connected or detachably connected or integrally connected; it can be directly connected or connected through an intermediate medium, and those skilled in the art can understand the connection relationship according to the specific situation and can derive screwing or riveting or soldering or clamping or embedding and the like in a suitable manner to replace different embodiments.

[0020] The orientation words such as up, down, left, right, top, bottom and the like described in the specification and shown in the drawings can be directly contacted or contacted through other features between them; for example, above can be directly above and obliquely above, or it only means higher than others; other orientations can be similarly understood.

[0021] The manufacturing materials of the components with solid shapes represented in the specification and the drawings can adopt metal materials or non-metal materials or other synthetic materials; the machining processes adopted by the components with solid shapes can be stamping, forging, casting, wire cutting, laser cutting, injection molding, numerical milling, three-dimensional printing, machining and the like; those skilled in the art can adaptively select or combine selection according to different processing conditions, cost and precision, but not limited to the above materials and manufacturing processes.

[0022] A temperature control test box, comprising a box body 1 and a water bath tank 2 opened in the box body 1, the opening of the water bath tank 2 is matched with a cover body 3, and a sealing contact layer 31 composed of silicon rubber embedded with a shape memory alloy spring net 311 is sequentially arranged from the side of the water bath tank 2 to the outside, directly contacting the liquid or steam in the water bath tank; a dynamic compensation layer 32 containing a composite material of temperature-sensitive hydrogel and sodium polyacrylate; a humidity adjusting layer 33 composed of a porous ceramic fiber layer and a lithium chloride moisture absorbent loaded in the pores thereof, the humidity adjusting layer 33 is completely wrapped inside the cover body 3, and the electronic components and metal connectors inside the cover body 3 are physically isolated; when water vapor penetrates through the sealing contact layer 31 and the dynamic compensation layer 32, the residual water molecules are captured by the lithium chloride moisture absorbent to reduce the humidity of the internal components of the cover body 3.

[0023] Further, the shape memory alloy spring net 311 is a nickel-titanium alloy, the austenite phase transition end temperature Af is 22-28℃, and the mesh density is 20-30 meshes / cm2.

[0024] Further, the temperature-sensitive hydrogel is a PNIPAM-co-AAc copolymer, and the lower critical solution temperature LCST is 32℃±2℃.

[0025] Further, the pore size of the porous ceramic fiber layer is 15-40μm, the porosity is ≥85%, and the loading amount of the lithium chloride moisture absorbent is 65-75% of the pore volume.

[0026] Further, the cover 3 is also provided with an opening mechanism, which comprises a semispherical avoiding groove 35 formed on the outer surface of the cover 3, and a linear handle 36 crossing the semispherical avoiding groove 35 and fixed on the groove edges of the semispherical avoiding groove 35 by means of anti-loosening bolts.

[0027] The working principle of the utility model is:

[0028] Embodiment 1

[0029] A constant temperature test box, comprising a box body 1 and a water bath tank 2 arranged in the box body 1, and a cover 3 arranged at the opening of the water bath tank 2.

[0030] The sealing contact layer 31 is composed of a nickel-titanium alloy shape memory alloy spring net 311 embedded in silicone rubber. The austenite phase transition end temperature Af of the nickel-titanium alloy is 25 DEG C, and the mesh density is 25 meshes / cm2. 2 The sealing contact layer 31 directly contacts with the liquid or steam in the water bath tank 2. When the water temperature rises from 25 DEG C to 95 DEG C, the nickel-titanium alloy shape memory alloy spring net 311 is heated to restore to the pre-set shape (in the process of manufacturing the nickel-titanium alloy shape memory alloy spring net 311, the shape can be pre-set by specific processing technology, such as heat treatment, etc. For example, when the spring net is manufactured, the mold and the corresponding heat treatment process can be used to make it maintain a net structure closely fitted with the shape of the water bath tank above the austenite phase transition end temperature Af. This pre-set shape is to meet the requirement of close fitting between the sealing contact layer and the water bath tank. When the temperature reaches the austenite phase transition end temperature Af, the nickel-titanium alloy shape memory alloy spring net starts to change to the pre-set shape, so that the contact between the sealing contact layer 31 and the water bath tank 2 is more closely, and the sealing effect is enhanced), so that the contact between the sealing contact layer 31 and the water bath tank 2 is more closely, and the liquid or steam leakage is prevented.

[0031] Dynamic compensation layer 32: composed of PNIPAM-co-AAc copolymer temperature-sensitive hydrogel and sodium polyacrylate with a mass ratio of 5:1. Its low critical solution temperature LCST is 32℃. When the liquid temperature in the water bath 2 changes, the temperature-sensitive hydrogel swells or shrinks, thereby dynamically compensating the sealing contact layer 31 and ensuring the sealing effect. For example, when the temperature is lower than 32℃, the hydrogel swells by absorbing water, and the sealing contact layer can adapt to the swelling of the hydrogel while maintaining good contact with the water bath. In this process, the swelling of the hydrogel will exert a certain extrusion on the sealing contact layer, making the sealing contact layer adhere more closely to the surface of the water bath, thereby enhancing the sealing effect. When the temperature is higher than 32℃, the hydrogel shrinks by losing water. During the shrinking process, the hydrogel produces an elastic restoring force like a spring. This elastic restoring force is due to the molecular chains inside the hydrogel trying to recover to their original conformation after losing water, thereby producing an outward thrust. This elastic restoring force can help the sealing contact layer 31 maintain the pressure on the water bath 2, thereby maintaining the sealing effect. Add water-absorbing substances such as sodium polyacrylate. Sodium polyacrylate has good water absorption and can absorb water from the surrounding environment when the temperature-sensitive hydrogel loses water, thereby reducing the amount of water lost by the hydrogel. At the same time, sodium polyacrylate can maintain certain water absorption properties at high temperatures, helping to maintain the volume and shape of the hydrogel and enhancing the stability and sealing performance of the hydrogel.

[0032] Humidity regulating layer 33: composed of a porous ceramic fiber layer and lithium chloride humidity absorber loaded in its pores. The pore size of the porous ceramic fiber layer can be 25μm, the porosity can be 90%, and the loading amount of lithium chloride humidity absorber can be 70% of the pore volume. The humidity regulating layer 33 is completely covered inside the cover 3, and is physically isolated from the electronic components and metal connectors inside the cover 3 (such as sensors, circuit boards, controllers, etc. for electronic components, and bolts, handles, etc. for metal connectors). When a small amount of water vapor penetrates the sealing contact layer 31 and the dynamic compensation layer 32, the lithium chloride humidity absorber can capture residual water molecules, reducing the humidity impact on the internal components of the cover 3 (i.e. electronic components and metal connectors), and preventing the internal components of the cover from being damaged by moisture.

[0033] The sealing contact layer, dynamic compensation layer, and humidity regulating layer can be connected in the following ways: using organic silicone resin, epoxy resin, etc. adhesive to bond the layers of materials together or hot pressing the layers of materials under high temperature and high pressure to make the molecular chains of the materials interact and form a firm connection; forming a whole structure of the above sealing contact layer, dynamic compensation layer, and humidity regulating layer and installing it into the cover, which can be designed with corresponding fixing grooves inside the cover, and fixed with mechanical fasteners such as bolts or buckles.

[0034] On the basis of the above technical scheme, the outer surface of the cover body 3 is provided with a semispherical avoiding groove 35, and a one-word handle 36 is fixed through a locking bolt. This design is convenient for the operator to quickly open and close the cover body 3 in different environments, and the stability of the handle 36 is good, and the handle 36 is not easy to be damaged, thereby prolonging the service life of the cover body 3. The cover body 3 is also provided in a semispherical structure, so that water droplets are not easy to form on the surface of the cover body, thereby reducing the risk of water droplets infiltrating the sealing interface to form a water film channel.

[0035] The temperature control test box of the present application can automatically adjust the sealing performance according to temperature changes through the synergistic effect of the shape memory alloy spring net and the temperature-sensitive hydrogel, ensures good sealing effect under different temperature conditions, effectively prevents liquid or steam from leaking from the water bath tank, and guarantees the stability and safety of the test environment. The lithium chloride humidity absorber in the humidity adjusting layer can capture residual water molecules that penetrate the sealing layer, reduce the humidity of the internal components of the cover body, prevent the electronic components and metal connectors in the cover body from being damaged by moisture, and prolong the service life of the equipment.

[0036] Although the present application is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through the disclosure that various changes or modifications can be made to the present application without departing from the principles and spirit of the present application defined by the claims. Therefore, the detailed description of the present application is only used to explain, but not to limit the present application, and the protection scope is defined by the content of the claims.

Claims

1. A temperature-controlled test chamber, comprising a chamber body (1) and a water bath (2) formed in the chamber body (1), an opening of the water bath (2) being fitted with a cover (3), characterized in that: From the water bath (2) side to the outside in turn are provided with: sealing contact layer (31): by embedded with shape memory alloy spring net (311) of silicone rubber, direct contact with the liquid or steam in the water bath; dynamic compensation layer (32): containing temperature sensitive hydrogel and polyacrylic acid sodium composite; Humidity regulating layer (33): by porous ceramic fiber layer and loaded in its pores of lithium chloride absorbent, the humidity regulating layer (33) is completely covered in the cover (3) inside, and with the electronic components and metal connectors inside the cover (3) keep physical isolation; When water vapor penetrates the sealing contact layer (31) and dynamic compensation layer (32), residual water molecules are captured by lithium chloride absorbent to reduce the humidity of the cover (3) inside components.

2. The temperature-controlled test chamber of claim 1, wherein, The shape memory alloy spring net (311) is nickel titanium alloy, and the austenite phase transition end temperature Af is 22-28℃, and the mesh density is 20-30 meshes / cm2.

3. The temperature-controlled test chamber of claim 1, wherein, The temperature sensitive hydrogel is PNIPAM-co-AAc copolymer, and the low critical solution temperature LCST is 32℃±2℃.

4. The temperature-controlled test chamber of claim 1, wherein, The pore size of the porous ceramic fiber layer is 15-40μm, the porosity is ≥85%, and the loading amount of lithium chloride absorbent is 65-75% of the pore volume.

5. The temperature-controlled test chamber of claim 1, wherein, The cover (3) is also provided with an opening mechanism, which comprises: a semispherical avoiding groove (35) formed on the outer surface of the cover (3), a horizontal handle (36) across the semispherical avoiding groove (35), and the two ends are fixed on the groove edge of the semispherical avoiding groove (35) by anti-loose bolts.

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