Quick-response phase change thermostat

Abstract

The utility model provides a quick-response phase-change constant-temperature box, relates to the technical field of constant-temperature devices, and solves the technical problems that the existing phase-change material constant-temperature box is inconvenient to use and the use effect is affected due to the fact that the speed of heating to the heat preservation temperature in the early stage is slow. The phase-change heat storage box comprises a phase-change heat storage layer used for storing heat of the box body, the phase-change heat storage layer is provided with a curing plate used for storing and fixing solid phase-change materials, and the curing plate is provided with open holes used for releasing liquid phase-change materials to the phase-change heat storage layer. According to the utility model, the heating layer has the advantages of higher heating efficiency, higher heating rate and higher response speed for the interior of the box body in the earlier stage; the solid-state phase-change material is converted into a liquid-state phase-change material which is in full contact with the heating layer to absorb heat, the heat is slowly released after heating is stopped, and the temperature of the box body is kept stable; after completion, the liquid phase change material is extracted and converted into a solid state, automatic sealing is achieved, the phase change heat storage layer is extracted into a semi-vacuum heat preservation layer, and the heat preservation effect of early-stage heating is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermostatic devices, in particular to a fast-response phase-change thermostatic box. Background Art

[0002] Constant temperature box, also known as blast drying box, is an essential test equipment in the fields of aviation, automobile, home appliance, scientific research, etc. It is used to test and determine the parameters and performance of electrical, electronic and other products and materials after the temperature environment changes during high temperature testing. Some constant temperature boxes are heated by hot water (water temperature type), but most of the experimental ones are electric heating type, equipped with electric heaters and temperature regulators, and are boxes or cabinets with insulation materials on the outer wall.

[0003] The heat transfer rate of the temperature control module of the traditional active thermostat is low, the temperature control time is long, and the heat transfer only occurs locally. It is also necessary to set up a turbulent fan in the device to even out the temperature. The traditional thermostat needs an uninterrupted power supply to maintain a constant temperature. In the event of a power outage, as the heat is transferred between the box and the outside world, the temperature inside the box will continue to change, the insulation effect is poor, and it cannot meet the need for constant temperature after a power outage.

[0004] Therefore, as proposed in the patent with publication number CN114812093A, a thermostat with a cam mechanism is proposed, in which the electric control box controls the semiconductor refrigerator and the fan to control the temperature of the thermostat, and reduces the heat leakage of the box by controlling the cam mechanism, and uses phase change materials to maintain the temperature during the insulation process to meet the requirements of higher insulation conditions. The present invention has both cooling and heating functions, precise temperature control, and can maintain a constant temperature in the thermostat for a certain period of time after power failure, while extending the insulation time.

[0005] However, the device is heated by a heat pipe, which stores heat in the phase change material layer at the same time. When the power is off, the phase change material layer releases heat. Although the insulation time can be extended when the power is off, the corresponding time to reach the insulation temperature will also be extended accordingly. For some special production processes that require rapid insulation, either the constant temperature box needs to be opened in advance for standby, or it will affect the early insulation effect, causing inconvenience in use and affecting the use effect. Utility Model Content

[0006] The utility model aims to provide an energy-saving thermostatic box to solve the technical problem that the existing phase change material thermostatic box is slow in heating to the insulation temperature in the early stage, causing inconvenience in use and affecting the use effect.

[0007] The embodiments of the present invention are implemented by the following technical solutions:

[0008] A fast-response phase-change thermostatic box comprises a box body and a heating layer for heating the box body, and also comprises a phase-change heat storage layer for storing heat in the box body, wherein the phase-change heat storage layer is provided with a curing plate for storing and fixing solid phase-change material, and the curing plate is provided with an opening for releasing liquid phase-change material into the phase-change heat storage layer.

[0009] Preferably, the curing plate is provided with a plurality of groups of fixing holes for storing and fixing the solid phase change material and through grooves for connecting the fixing holes and the openings.

[0010] Preferably, the through groove is also connected to a negative pressure device for extracting the liquid phase change material after the insulation is completed and a storage box for storing the extracted liquid phase change material.

[0011] Preferably, the storage box is provided with a heating device for heating the phase change material and a connecting pipe connected to the through groove.

[0012] Preferably, the phase-change heat storage layer is arranged on the outside of the heating layer, and a heat-insulating layer for keeping the box body warm is also arranged on the outside of the phase-change heat storage layer.

[0013] Preferably, the box body is also provided with a plurality of groups of support columns for supporting and fixing the heating layer and for limiting and fixing the thermal insulation layer and the phase change heat storage layer.

[0014] Preferably, the heating layer is provided with several groups of heating plates for heating the air and several groups of fans for conveying the heated air.

[0015] Preferably, it also includes a box door that is rotatable on the box body through a rotating shaft, and the box door is provided with a sealing strip for sealing the box body.

[0016] By adopting the technical solution, the solid phase change material can be solidified and stored in the curing plate. The curing plate has no direct contact with the heating layer and can only transfer heat slowly through the interlayer air. Therefore, the heating efficiency of the heating layer for the interior of the box is high in the early stage and the heating rate is fast. After the solid phase change material of the curing plate is slowly heated to the melting point, it is transformed into a liquid phase change material and flows out from the opening to the phase change heat storage layer, where it fully contacts with the heating layer to absorb heat. After the through groove is unblocked, the phase change material in the storage box is also heated and then passed into the phase change heat storage layer to fully absorb the heat of the heating layer. After the heating layer stops heating, the heat is slowly released to keep the box temperature stable.

[0017] After the insulation is completed, the liquid phase change material is partially extracted into the storage box and partially extracted into the fixed hole through the negative pressure device, and waits for cooling to change into a solid state, and then it can be automatically sealed, and the phase change heat storage layer is extracted into a semi-vacuum insulation layer, thereby enhancing the insulation effect of the constant temperature early heating.

[0018] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0019] 1. The utility model solidifies the solid phase change material and stores it in the curing plate. The curing plate has no direct contact with the heating layer and can only transfer heat slowly through the interlayer air. Therefore, the heating efficiency of the heating layer for the interior of the box is higher in the early stage, the heating rate is faster, and the response speed is faster;

[0020] 2. After the solid phase change material of the utility model is slowly heated to the melting point, it is transformed into a liquid phase change material, which fully contacts the heating layer to absorb heat, and slowly releases heat after the heating layer stops heating, so as to keep the temperature of the box stable;

[0021] 3. After the insulation of the utility model is completed, the liquid phase change material is partially extracted into the storage box through the negative pressure device, and partially extracted into the fixed hole, waiting for cooling to change into a solid state, and then it can be automatically sealed, and the phase change heat storage layer is extracted into a semi-vacuum insulation layer, thereby enhancing the insulation effect of constant temperature early heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic cross-sectional structure diagram of a fast-response phase-change thermostat provided in Example 1 of the utility model;

[0024] Figure 2 A partially enlarged structural schematic diagram of a fast-response phase-change thermostat provided in Example 2 of the utility model;

[0025] Figure 3 A partially enlarged structural schematic diagram of a fast-response phase-change thermostat provided in Example 2 of the utility model;

[0026] Icons: 1. Box body; 11. Support column; 2. Box door; 21. Sealing strip; 22. Rotating shaft; 3. Insulation layer; 4. Phase change heat storage layer; 5. Curing plate; 51. Through groove; 52. Fixing hole; 53. Opening hole; 6. Heating layer; 7. Heating plate; 8. Negative pressure device; 81. Heating device; 82. Connecting pipe; 83. Storage box; 9. Fan. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does 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 cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example 1

[0033] A fast-response phase-change thermostatic box comprises a box body 1 and a heating layer 6 for heating the box body 1, and also comprises a phase-change heat storage layer 4 for storing heat in the box body 1, wherein the phase-change heat storage layer 4 is provided with a curing plate 5 for storing and fixing solid phase-change material, and the curing plate 5 is provided with an opening 53 for releasing liquid phase-change material to the phase-change heat storage layer 4.

[0034] In this embodiment, the through groove 51 is also connected to a negative pressure device 8 for extracting the liquid phase change material after the heat preservation is completed and a storage box 83 for storing the extracted liquid phase change material.

[0035] In this embodiment, the storage box 83 is provided with a heating device 81 for heating the phase change material and a connecting pipe 82 communicating with the through groove 51 .

[0036] In this embodiment, the phase-change heat storage layer 4 is disposed on the outside of the heating layer 6 , and a heat-insulating layer 3 for keeping the box body 1 warm is also disposed on the outside of the phase-change heat storage layer 4 .

[0037] In this embodiment, the box body 1 is further provided with a plurality of groups of support columns 11 for supporting and fixing the heating layer 6 and for limiting and fixing the thermal insulation layer 3 and the phase change heat storage layer 4.

[0038] In this embodiment, the heating layer 6 is provided with a plurality of groups of heating plates 7 for heating air and a plurality of groups of fans 9 for conveying the heated air.

[0039] Working principle and usage:

[0040] When working, the solid phase change material can be solidified and stored in the curing plate 5. The curing plate 5 has no direct contact with the heating layer 6 and can only transfer heat slowly through the interlayer air. Therefore, the heating efficiency of the heating layer 6 for the interior of the box 1 is relatively high in the early stage, and the heating rate is relatively fast. After the solid phase change material of the curing plate 5 is slowly heated to the melting point, it is transformed into a liquid phase change material, flows out from the opening 53, flows to the phase change heat storage layer 4, and fully contacts with the heating layer 6 to absorb heat. After the through groove 51 is unblocked, the phase change material in the storage box 83 is also heated and then passed into the phase change heat storage layer 4 to fully absorb the heat of the heating layer 6, and slowly releases heat after the heating layer 6 stops heating, so as to keep the temperature of the box 1 stable.

[0041] After the insulation is completed, the liquid phase change material is partially extracted into the storage box 83 and partially extracted into the fixed hole 52 through the negative pressure device 8, and waits for cooling to change into a solid state, and then it can be automatically sealed, and the phase change heat storage layer 4 is evacuated into a semi-vacuum insulation layer 3, thereby enhancing the insulation effect of the constant temperature early heating.

[0042] Example 2

[0043] The only difference between this embodiment and the first embodiment is that, in this embodiment, the curing plate 5 is provided with a plurality of fixing holes 52 for storing and fixing the solid phase change material and through grooves 51 for connecting the fixing holes 52 and the openings 53 .

[0044] In this embodiment, a box door 2 disposed on the box body 1 is further included, which is rotated by a rotating shaft 22 . The box door 2 is provided with a sealing strip 21 for sealing the box body 1 .

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fast-response phase-change thermostatic box, comprising a box body (1) and a heating layer (6) for heating the box body (1), characterized in that: It also comprises a phase-change heat storage layer (4) for storing heat for the box body (1), the phase-change heat storage layer (4) being provided with a curing plate (5) for storing and fixing solid phase-change material, the curing plate (5) being provided with an opening (53) for releasing liquid phase-change material into the phase-change heat storage layer (4).

2. A fast-response phase-change thermostat according to claim 1, characterized in that: The curing plate (5) is provided with a plurality of groups of fixing holes (52) for storing and fixing solid phase change materials and through grooves (51) for connecting the fixing holes (52) and the openings (53).

3. A fast-response phase-change thermostat according to claim 2, characterized in that: The through groove (51) is also connected to a negative pressure device (8) for extracting liquid phase change material after heat preservation is completed, and a storage box (83) for storing the extracted liquid phase change material.

4. A fast-response phase-change thermostat according to claim 3, characterized in that: The storage box (83) is provided with a heating device (81) for heating the phase change material and a connecting pipe (82) connected to the through groove (51).

5. A fast-response phase-change thermostat according to any one of claims 1 to 4, characterized in that: The phase-change heat storage layer (4) is arranged on the outside of the heating layer (6), and a heat-insulating layer (3) for keeping the box (1) warm is also arranged on the outside of the phase-change heat storage layer (4).

6. A fast-response phase-change thermostat according to claim 5, characterized in that: The box body (1) is also provided with a plurality of groups of support columns (11) for supporting and fixing the heating layer (6) and for limiting and fixing the thermal insulation layer (3) and the phase change heat storage layer (4).

7. A fast-response phase-change thermostat according to any one of claims 1 to 4 and 6, characterized in that: The heating layer (6) is provided with a plurality of groups of heating plates (7) for heating air and a plurality of groups of fans (9) for conveying the heated air.

8. A fast-response phase-change thermostat according to any one of claims 1 to 4 and 6, characterized in that: It also comprises a box door (2) arranged on the box body (1) and rotatable via a rotating shaft (22), wherein the box door (2) is provided with a sealing strip (21) for sealing the box body (1).

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