Constant temperature device

Abstract

The invention relates to a thermostat. The constant temperature device comprises a liquid storage chamber in which a heat-conducting medium is arranged; the temperature control mechanism is used for adjusting the temperature of the heat-conducting medium; the constant temperature cylinder is sequentially sleeved with the multiple heat preservation cylinders, preset gaps are formed between the multiple heat preservation cylinders, and the multiple heat preservation cylinders are configured to be in fluid communication with the liquid storage chamber; and the heat-conducting medium is allowed to flow into the constant-temperature cylinder through the preset gap, and the preset gap and the constant-temperature cylinder are filled with the heat-conducting medium. According to the constant-temperature device, the heat-conducting medium can be smoothly conveyed into the constant-temperature cylinder through the multiple heat preservation cylinders sequentially arranged outside the constant-temperature cylinder in a sleeving mode, temperature control and heat preservation of the heat-conducting medium in the constant-temperature cylinder are achieved, the preset gaps can be filled with the heat-conducting medium, heat loss of the heat-conducting medium in the constant-temperature cylinder is prevented, and the service life of the heat-conducting medium is prolonged. And the temperature fluctuation degree and the temperature field uniformity of the temperature of the heat-conducting medium in the constant-temperature cylinder are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of constant temperature equipment, in particular to a constant temperature device. Background Art

[0002] A thermostat (or "thermostatic bath") is a device that provides stable and uniform temperature control. It is mainly used in some occasions with special temperature requirements, such as chemical reaction research, biological research, clinical analysis, food testing, etc. It provides the required temperature control conditions for various experiments, tests, heating, cooling and sample processing processes through a constant temperature environment.

[0003] The thermostat is usually composed of a bath, a heater, a thermometer, a controller and other components. Among them, the bath is the core part of the thermostat. It is mainly made of corrosion-resistant and high-temperature resistant materials, and a suitable heat-conducting medium (such as water, etc.) is placed in the bath according to actual needs. However, the heat-conducting medium in the bath will exchange heat with the surrounding environment, and the heat is easily dissipated, causing the temperature in the bath to fluctuate easily, thereby reducing the temperature fluctuation degree (that is, the temperature fluctuation size at a certain position in the bath) and the temperature field uniformity (that is, the difference in temperature values ​​between different positions in the bath) during the experiment or test.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0005] In order to solve or improve to a certain extent the technical problem that the thermostat device in the prior art is difficult to ensure the temperature fluctuation and temperature field uniformity, the present invention provides a thermostat device. The thermostat device comprises: a liquid storage chamber, in which a heat-conducting medium is arranged; a temperature control mechanism, which is used to adjust the temperature of the heat-conducting medium; a thermostat tube and a plurality of heat-insulating tubes, which are sequentially sleeved on the thermostat tube and form a predetermined gap between each other, and the plurality of heat-insulating tubes are configured to form a fluid connection with the liquid storage chamber to allow the heat-conducting medium to flow into the thermostat tube through the predetermined gap and fill the predetermined gap and the thermostat tube.

[0006] It can be understood by those skilled in the art that the thermostatic device of the present invention includes a liquid storage chamber, a temperature control mechanism, a thermostatic cylinder and a plurality of insulation cylinders. Among them, the liquid storage chamber is used to store a heat-conducting medium. The temperature control mechanism is used to adjust the temperature of the heat-conducting medium to meet the temperature control needs. The thermostatic cylinder is the core component of the thermostatic device, which is used to accommodate the sample to be processed and to control and insulate it. A plurality of insulation cylinders are sequentially sleeved outside the thermostatic cylinder. A predetermined gap is formed between the insulation cylinder and the thermostatic cylinder, and between the insulation cylinder and the insulation cylinder. Fluid communication is formed between the plurality of insulation cylinders and the liquid storage chamber, so that the heat-conducting medium after the temperature control mechanism is controlled can flow into the thermostatic cylinder through the predetermined gap and fill in the predetermined gap and the thermostatic cylinder. The thermostatic device of the present invention utilizes a plurality of insulation cylinders sequentially sleeved on the thermostatic cylinder to not only smoothly transfer the heat-conducting medium to the thermostatic cylinder, realize the heating and insulation of the sample to be processed, but also fill the heat-conducting medium in the predetermined gap to prevent the heat loss in the thermostatic cylinder, and effectively improve the temperature fluctuation and temperature field uniformity in the thermostatic cylinder.

[0007] In the preferred technical solution of the above-mentioned constant temperature device, the multiple heat preservation cylinders include: a first heat preservation cylinder, the first heat preservation cylinder is close to the constant temperature cylinder and is provided with a liquid inlet connected to the liquid storage chamber, and the upper end surface of the first heat preservation cylinder is higher than the upper end surface of the constant temperature cylinder in the assembled state; and a second heat preservation cylinder, the second heat preservation cylinder is far away from the constant temperature cylinder and is provided with a liquid outlet connected to the liquid storage chamber cavity, and the upper end surface of the second heat preservation cylinder is higher than the upper end surface of the first heat preservation cylinder in the assembled state. The first heat preservation cylinder close to the constant temperature cylinder is provided with a liquid inlet connected to the liquid storage chamber, and the second heat preservation cylinder far away from the constant temperature cylinder is provided with a liquid outlet connected to the liquid storage chamber, which can conveniently realize the fluid communication between the multiple heat preservation cylinders and the liquid storage chamber. In addition, in the assembled state, the upper end surface of the first heat preservation cylinder is set to be higher than the upper end surface of the constant temperature cylinder, so that the heat transfer medium located between the first heat preservation cylinder and the constant temperature cylinder can smoothly flow into the constant temperature cylinder and fill the constant temperature cylinder. Furthermore, in the assembled state, the upper end surface of the second heat-insulating tube is higher than the upper end surface of the first heat-insulating tube, which can prevent the heat-conducting medium between the first heat-insulating tube and the second heat-insulating tube from overflowing from the edge of the second heat-insulating tube.

[0008] In the preferred technical solution of the above-mentioned constant temperature device, in the assembled state, the lower edge of the liquid outlet is higher than or equal to the upper end face of the constant temperature cylinder; and / or the multiple insulation cylinders also include: a third insulation cylinder, the third insulation cylinder is located between the first insulation cylinder and the second insulation cylinder, and a liquid conducting hole connected to the predetermined gap is opened on the third insulation cylinder. In the assembled state, the lower edge of the liquid outlet is set to be higher than or equal to the upper end face of the constant temperature cylinder, which can ensure that the liquid level of the heat-conducting medium in the predetermined gap is not lower than the liquid level of the heat-conducting medium in the constant temperature cylinder, and ensure the stability and consistency of the temperature of the heat-conducting medium in the constant temperature cylinder. In addition, the provision of the third insulation cylinder can increase the number of layers of the insulation cylinder, further improving the temperature fluctuation and temperature field uniformity of the heat-conducting medium in the constant temperature cylinder.

[0009] In the preferred technical solution of the above-mentioned constant temperature device, the liquid inlet is located at the bottom of the first thermal insulation tube; and / or the liquid guide hole is located at the bottom of the third thermal insulation tube; and / or the upper end surface of the third thermal insulation tube is equal to the upper end surface of the second thermal insulation tube in the assembled state. The liquid inlet is arranged at the bottom of the first thermal insulation tube, so that the heat-conducting medium can be smoothly and evenly filled in the predetermined gap between the first thermal insulation tube and the constant temperature tube. In addition, the liquid guide hole is arranged at the bottom of the third thermal insulation tube, so that the heat-conducting medium can flow in the predetermined gap through the liquid guide hole under the action of its own gravity. Furthermore, in the assembled state, the upper end surface of the third thermal insulation tube is equal to the upper end surface of the second thermal insulation tube, so that the liquid level of the heat-conducting medium between the third thermal insulation tube and the first thermal insulation tube is higher than the liquid level of the heat-conducting medium in the constant temperature tube, thereby ensuring the thermal insulation effect.

[0010] In the preferred technical solution of the above thermostatic device, the liquid guide hole and the liquid inlet have the same symmetrical central axis. The above arrangement is not only convenient for processing, but also allows the heat transfer medium to flow evenly in the predetermined gap to ensure temperature uniformity.

[0011] In the preferred technical solution of the above thermostatic device, there are multiple third heat-insulating cylinders, and the multiple heat-insulating cylinders are sequentially spaced apart along the radial direction of the thermostatic cylinder. The provision of multiple third heat-insulating cylinders can further increase the number of layers of the heat-insulating cylinders and improve the temperature stability of the heat-conducting medium in the thermostatic cylinder.

[0012] In the preferred technical solution of the above-mentioned constant temperature device, the temperature control mechanism includes a heater for heating the heat-conducting medium in the liquid storage chamber and a refrigerator for cooling the heat-conducting medium in the liquid storage chamber. Through the above-mentioned arrangement, the temperature of the heat-conducting medium in the liquid storage chamber can be accurately adjusted.

[0013] In the preferred technical solution of the above-mentioned constant temperature device, the heater is one or more of a resistive heater, a heat pump heater, a microwave heater and a far-infrared heater; and / or the refrigerator is one or more of a heat pump refrigerator, an absorption refrigerator and a semiconductor refrigerator; and / or the temperature control mechanism also includes a stirrer arranged in the liquid storage chamber for stirring the heat transfer medium. The heater and the refrigerator can be selected according to actual needs to meet the needs of differentiated product design. In addition, the setting of the stirrer can improve the uniformity of the temperature of the heat transfer medium in the liquid storage chamber.

[0014] In the preferred technical solution of the above-mentioned constant temperature device, the liquid storage chamber and the multiple insulation cylinders are fluidically connected by a liquid inlet pipe and a liquid return pipe respectively; and a liquid inlet pump is provided on the liquid inlet pipe, and / or a liquid return pump is provided on the liquid return pipe; and / or the liquid inlet pipe and the liquid return pipe are both insulation pipes. The provision of the liquid inlet pipe and the liquid return pipe can conveniently realize the fluid connection between the liquid storage chamber and the multiple insulation cylinders. The provision of the liquid inlet pump and the liquid return pump can ensure that the heat-conducting medium flows smoothly from the liquid storage chamber to the insulation cylinder and fills the constant temperature cylinder, and then flows back to the liquid storage chamber. The liquid inlet pipe and the liquid return pipe are both insulation pipes, which can reduce the heat loss of the heat-conducting medium when it flows in the liquid inlet pipe and the liquid return pipe.

[0015] In the preferred technical solution of the above-mentioned constant temperature device, a first temperature sensor is provided in the liquid storage chamber; and / or a liquid level sensor is provided in the liquid storage chamber; and / or a second temperature sensor is provided in the constant temperature cylinder; and / or the constant temperature cylinder and the insulation cylinder are made of transparent material; and / or the constant temperature cylinder and the insulation cylinder are made of metal material, and observation windows are provided on the constant temperature cylinder and the insulation cylinder; and / or the constant temperature device also includes an insulation chamber wrapping the liquid storage chamber, and insulation material is provided between the insulation chamber and the liquid storage chamber; and / or the constant temperature device also includes a controller that forms a communication connection with the temperature control mechanism; and / or the liquid storage chamber, the constant temperature cylinder and the multiple insulation cylinders are detachably connected; and / or the controller and the temperature control mechanism are detachably connected. The arrangement of the first sensor and the second sensor can accurately measure the real-time temperature of the heat-conducting medium in the liquid storage chamber and the constant temperature cylinder, which is convenient for temperature control. The arrangement of the liquid level sensor can accurately measure the liquid level height of the heat-conducting medium in the liquid storage chamber, which is convenient for precise adjustment. The constant temperature cylinder and the insulation cylinder are made of transparent materials, which is convenient for observing the samples to be processed in the constant temperature cylinder; compared with other insulation structures (such as insulation cotton, etc.), the use of multiple transparent insulation cylinders as insulation structures can not only achieve good insulation effect, but also facilitate observation of the samples to be tested in the constant temperature cylinder, and no additional observation window is required, which simplifies the processing technology and ensures the insulation effect. Wrapping the insulation chamber outside the liquid storage chamber and filling the insulation chamber with suitable insulation materials between the insulation chamber and the liquid storage chamber can prevent the heat loss of the heat-conducting medium in the liquid storage chamber and improve the temperature control efficiency and temperature control accuracy. The setting of the controller can improve the accuracy and automation level of temperature control. In addition, setting the liquid storage cylinder, the constant temperature cylinder and the multiple insulation cylinders, and the controller and the temperature control mechanism into a detachable connection can improve the convenience of the constant temperature device, facilitate disassembly and transportation, so as to meet the actual needs of different test scenarios (such as on-site and online test scenarios such as field testing and laboratory work). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0017] Figure 1 1 is a schematic structural diagram of an embodiment of a thermostatic device of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the liquid storage chamber and the temperature control mechanism of the thermostatic device of the present invention;

[0019] Figure 3 It is a structural schematic diagram of a first embodiment of a constant temperature cylinder and a heat preservation cylinder of a constant temperature device of the present invention;

[0020] Figure 4It is a structural schematic diagram of a second embodiment of a constant temperature cylinder and a heat preservation cylinder of a constant temperature device of the present invention;

[0021] Figure 5 It is a structural schematic diagram of a third embodiment of a constant temperature cylinder and a heat preservation cylinder of a constant temperature device of the present invention.

[0022] List of reference numerals:

[0023] 1. Constant temperature device; 10. Liquid storage chamber; 11. Heat transfer medium; 12. First temperature sensor; 13. Liquid level sensor; 20. Insulation chamber; 30. Temperature control mechanism; 31. Heater; 32. Refrigerator; 33. Agitator; 34. Cooling fan; 40. Constant temperature cylinder; 41. Second temperature sensor; 50. Insulation cylinder; 51. First insulation cylinder; 511. Liquid inlet; 52. Second insulation cylinder; 521. Liquid outlet; 522. Perforation; 53. Third insulation cylinder; 531. Liquid guide hole; 54. Predetermined gap; 60. Liquid inlet pipe; 70. Liquid return pipe; 80. Liquid inlet pump; 90. Liquid return pump; 100. Controller. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0025] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "front", "back", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0026] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" 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 direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In order to solve or improve to a certain extent the technical problem that the thermostat device in the prior art is difficult to ensure the stability of temperature, the present invention provides a thermostat device 1. The thermostat device 1 comprises: a liquid storage chamber 10, in which a heat-conducting medium 11 is arranged; a temperature control mechanism 30, which is used to adjust the temperature of the heat-conducting medium 11; a thermostat 40 and a plurality of heat-insulating cylinders 50, wherein the plurality of heat-insulating cylinders 50 are sequentially sleeved outside the thermostat 40 and a predetermined gap 54 is formed between each other, and the plurality of heat-insulating cylinders 50 are configured to form a fluid connection with the liquid storage chamber 10, so as to allow the heat-conducting medium 11 to flow into the thermostat 40 through the predetermined gap 54 and fill the predetermined gap 54 and the thermostat 40.

[0028] Figure 1 Schematic diagram of the structure of an embodiment of the thermostat of the present invention. Figure 1 As shown, in one or more embodiments, the constant temperature device 1 of the present invention includes a liquid storage chamber 10, a temperature control mechanism 30, a constant temperature cylinder 40, a heat preservation cylinder 50 and other components.

[0029] Figure 2 Schematic diagram of the structure of the liquid storage chamber and temperature control mechanism of the thermostatic device of the present invention. Figure 1 and Figure 2 As shown, the liquid storage chamber 10 is used to contain a heat-conducting medium 11. The heat-conducting medium 11 can be, but is not limited to, water, silicone oil, etc. The liquid storage chamber 10 can be made of a suitable material, such as stainless steel, glass, etc., so that it has good corrosion resistance, high temperature resistance, etc. The shape of the liquid storage chamber 10 can be cylindrical, square columnar, or other suitable shapes.

[0030] like Figure 2 As shown, in one or more embodiments, a first temperature sensor 12 is provided in the liquid storage chamber 10 to detect the real-time temperature of the heat-conducting medium 11 in the liquid storage chamber 10. The first temperature sensor 12 may be, but is not limited to, a thermocouple sensor, a thermistor sensor, a thermistor capacitor sensor, etc. In addition, the number and arrangement positions of the first temperature sensors 12 may also be adjusted according to actual needs.

[0031] like Figure 2 As shown, in one or more embodiments, a liquid level sensor 13 is further provided in the liquid storage chamber 10 to detect the liquid level height of the heat-conducting medium 11 in the liquid storage chamber 10. When the liquid level height is too high, the heat-conducting medium 11 is at risk of overflowing; when the liquid level height is too low, the heat-conducting medium 11 is at risk of dry burning. By providing the liquid level sensor 13, the user can be reminded in time to adjust the capacity of the heat-conducting medium 11 in the liquid storage chamber 10 so that it is at a reasonable liquid level. The liquid level sensor 13 can be, but is not limited to, an optical liquid level sensor 13, a capacitive liquid level sensor 13, a conductive liquid level sensor 13, and a float-type liquid level sensor 13. In addition, the number and arrangement position of the liquid level sensor 13 can also be adjusted according to actual needs.

[0032] like Figure 2 As shown, in one or more embodiments, the thermostatic device 1 of the present invention further includes an insulation chamber 20 that wraps the liquid storage chamber 10. The insulation chamber 20 can be made of suitable materials, such as stainless steel, glass, etc., so that it has good mechanical strength. An appropriate amount of insulation material is also provided between the insulation chamber 20 and the liquid storage chamber 10 to reduce the heat loss of the heat-conducting medium 11 in the liquid storage chamber 10. The type of insulation material is not limited, such as rock wool, glass wool, polyurethane foam, polyethylene foam, etc.

[0033] like Figure 1 and Figure 2 As shown, in one or more embodiments, the temperature control mechanism 30 includes a heater 31 and a refrigerator 32. Among them, the heater 31 is used to heat the heat-conducting medium 11 in the liquid storage chamber 10, and the refrigerator 32 is used to cool the heat-conducting medium 11 in the liquid storage chamber 10. The heater 31 and the refrigerator 32 can flexibly and accurately adjust the temperature of the heat-conducting medium 11 in the liquid storage chamber 10 to meet the temperature requirements. In one or more embodiments, the heater 31 is a resistive heater. Alternatively, the heater 31 can also be configured as a heat pump heater, a microwave heater, a far infrared heater or other suitable types. In addition, the number and arrangement position of the heater 31 can also be adjusted according to actual needs. In one or more embodiments, the refrigerator 32 is a heat pump refrigerator. Alternatively, the refrigerator 32 can also be configured as an absorption refrigerator, a semiconductor refrigerator or other suitable types. In addition, the number and arrangement position of the refrigerator 32 can also be adjusted according to actual needs.

[0034] like Figure 1 and Figure 2 As shown, in one or more embodiments, the temperature control mechanism 30 further includes an agitator 33. The agitator 33 is used to agitate the heat-conducting medium 11 in the liquid storage chamber 10 to improve the uniformity of the temperature of the heat-conducting medium 11. The type of the agitator 33 is not limited, such as a flat blade agitator, a pitch blade agitator, a curved blade agitator, a spiral blade agitator, etc. In addition, the number and arrangement position of the agitator 33 can be adjusted according to actual needs.

[0035] like Figure 1 and Figure 2 As shown, in one or more embodiments, the temperature control mechanism 30 further includes a heat dissipation fan 34. The heat dissipation fan 34 is arranged between the insulation chamber 20 and the liquid storage chamber 10 and opposite to the refrigerator 32, so as to dissipate heat from the refrigerator 32 and ensure its normal use. The type of the heat dissipation fan 34 is not limited, such as an axial flow fan, a cross-flow fan, etc. In addition, the number of the heat dissipation fan 34 can also be set to multiple according to actual needs, such as 2, 3, etc.

[0036] like Figure 1 and Figure 2 As shown, in one or more embodiments, the liquid storage chamber 10 and the plurality of insulation cylinders 50 are respectively connected by a liquid inlet pipe 60 and a liquid return pipe 70 to form a fluid connection, so that the heat-conducting medium 11 in the liquid storage chamber 10 can flow to the insulation cylinder 50 along the liquid inlet pipe 60, and the heat-conducting medium 11 in the insulation cylinder 50 can flow back to the liquid storage chamber 10 along the liquid return pipe 70. In one or more embodiments, the liquid storage chamber 10 and the plurality of insulation cylinders 50 are detachably connected to improve the convenience of the constant temperature device 1 and meet the actual needs of different test scenarios. In one or more embodiments, the liquid inlet pipe 60 and the liquid return pipe 70 are both insulation pipes to reduce the heat loss of the heat-conducting medium 11 when it flows in the liquid inlet pipe 60 and the liquid return pipe 70. The material of the insulation pipe can be a rubber-plastic insulation pipe, a polyurethane insulation pipe, a glass wool insulation pipe, etc. In one or more embodiments, a liquid inlet pump 80 is provided on the liquid inlet pipe 60, and a liquid return pump 90 is provided on the liquid return pipe 70. By setting the liquid inlet pipe 60 and the liquid return pipe 70, not only can the smooth flow of the heat transfer medium 11 be ensured, but also the opening and closing timing and output power of the liquid inlet pump 80 and the liquid return pump 90 can be flexibly selected to meet the actual needs of different usage scenarios. Alternatively, the liquid inlet pump 80 can be provided only on the liquid inlet pipe 60, or the liquid return pump 90 can be provided only on the liquid return pipe 70 to reduce the cost of components. In one or more embodiments, the liquid inlet pipe 60 and the liquid outlet pipe are also provided with on-off valves (not shown in the figure) to control their opening or closing. The type of on-off valve is not limited, such as a butterfly valve, a ball valve, etc.

[0037] Figure 3 1 is a schematic structural diagram of a first embodiment of a thermostatic cylinder and a heat preservation cylinder of a thermostatic device of the present invention. Figure 3 As shown, in one or more embodiments, the thermostatic cylinder 40 has a substantially cylindrical shape. Alternatively, the thermostatic cylinder 40 may also be configured in other suitable shapes, such as a square cylinder, etc. The thermostatic cylinder 40 is used to accommodate the sample to be processed so that the sample to be processed can be heated and kept warm by using the heat-conducting medium 11. The thermostatic cylinder 40 may be made of a suitable transparent material, such as glass, resin, etc., so as to observe the sample to be processed. Alternatively, the thermostatic cylinder 40 may also be made of a suitable metal material (such as stainless steel, etc.), and an observation window (not shown in the figure) is provided on the thermostatic cylinder 40. In one or more embodiments, a second temperature sensor 41 is also provided in the thermostatic cylinder 40 to detect the real-time temperature of the heat-conducting medium 11 in the thermostatic cylinder 40. The second temperature sensor 41 may be, but is not limited to, a thermocouple sensor, a thermistor sensor, a thermistor capacitor sensor, etc. In addition, the number and arrangement position of the second temperature sensor 41 may also be adjusted according to actual needs.

[0038] like Figure 3As shown, in one or more embodiments, the plurality of insulation tubes 50 include a first insulation tube 51 and a second insulation tube 52 which are sequentially sleeved on the constant temperature tube 40. Among them, the first insulation tube 51 is close to the constant temperature tube 40, and the second insulation tube 52 is far away from the constant temperature tube 40. In one or more embodiments, the constant temperature tube 40, the first insulation tube 51 and the second insulation tube 52 have the same symmetrical central axis, so that the heat-conducting medium 11 can be evenly distributed. The tops of the plurality of insulation tubes 50 and the constant temperature tube 40 can be sealed with a suitable top cover (not shown in the figure). The first insulation tube 51 and the second insulation tube 52 can be set to a cylindrical shape, a square cylinder shape or other suitable shapes. The first insulation tube 51 and the second insulation tube 52 can be made of suitable transparent materials, such as glass, resin, etc., so as to observe the sample to be processed. Alternatively, the first heat-insulating barrel 51 and the second heat-insulating barrel 52 may also be made of metal materials (such as stainless steel, etc.), and observation windows (not shown in the figure) are provided at appropriate positions of the first heat-insulating barrel 51 and the second heat-insulating barrel 52 so as to correspond to the observation windows on the constant temperature barrel 40. In one or more embodiments, the first heat-insulating barrel 51, the second heat-insulating barrel 52 and the constant temperature barrel 40 are detachably connected to improve the convenience of the constant temperature device 1. A liquid inlet 511 connected to the liquid storage chamber 10 is provided on the first heat-insulating barrel 51, and a liquid outlet 521 connected to the liquid storage chamber 10 is provided on the second heat-insulating barrel 52, so that the heat-conducting medium 11 in the liquid storage chamber 10 can flow into the first heat-insulating barrel 51 from the liquid inlet 511, and the heat-conducting medium 11 in the second heat-insulating barrel 52 can flow back to the liquid storage chamber 10 from the liquid outlet 521. Specifically, the liquid inlet 511 is connected to the liquid storage chamber 10 through the liquid inlet pipe 60, and the liquid storage port is connected to the liquid storage chamber 10 through the liquid outlet pipe (see Figure 1 and Figure 4 ). A predetermined gap 54 is provided between the first heat-insulating cylinder 51 and the thermostatic cylinder 40, and between the second heat-insulating cylinder 52 and the first heat-insulating cylinder 51, so that the heat-conducting medium 11 flowing from the liquid storage chamber 10 into the first heat-insulating cylinder 51 can flow into the thermostatic cylinder 40 through the predetermined gap 54 and fill the predetermined gap 54 and the thermostatic cylinder 40. In addition, in the assembled state, the upper end surface of the first heat-insulating cylinder 51 is higher than the upper end surface of the thermostatic cylinder 40, so that the heat-conducting medium 11 located in the predetermined gap 54 between the first heat-insulating cylinder 51 and the thermostatic cylinder 40 can smoothly flow to the thermostatic cylinder 40 under the action of its own gravity and fill the entire thermostatic cylinder 40. Furthermore, in the assembled state, the upper end surface of the second insulation tube 52 is higher than the upper end surface of the first insulation tube 51, so that when the first insulation tube 51 is filled with the heat-conducting medium 11, the heat-conducting medium 11 can overflow from the first insulation tube 51 and flow to the predetermined gap 54 between the second insulation tube 52 and the first insulation tube 51, and then fill the predetermined gap 54 between the second insulation tube 52 and the first insulation tube 51.

[0039] Continue to see Figure 3In one or more embodiments, the liquid inlet 511 is arranged at the bottom of the first insulation cylinder 51, so that the heat-conducting medium 11 can be smoothly and evenly filled in the predetermined gap 54 between the first insulation cylinder 51 and the constant temperature cylinder 40. Further, the liquid inlet 511 has the same symmetric central axis as the constant temperature cylinder 40, the first insulation cylinder 51 and the second insulation cylinder 52, so as to further improve the uniformity of the distribution of the heat-conducting medium 11. In one or more embodiments, a perforation 522 opposite to the liquid inlet 511 is provided at the bottom of the second insulation tube to allow the liquid inlet pipe 60 to pass therethrough. A sealing ring (not shown in the figure) surrounding the liquid inlet pipe 60 may be provided in the perforation 522 to improve the sealing performance. Further, the perforation 522 also has the same symmetric central axis as the liquid inlet 511, the constant temperature cylinder 40, the first insulation cylinder 51 and the second insulation cylinder 52, so as to facilitate processing. Alternatively, the liquid inlet 511 may also be provided at other positions of the first insulation cylinder 51, such as on the circumferential wall (not shown in the figure). Correspondingly, the arrangement position of the through hole 522 can also be adjusted according to the liquid inlet 511 , for example, arranged on the circumferential wall of the second heat-insulating cylinder 52 .

[0040] Continue to see Figure 3 In one or more embodiments, the liquid outlet 521 is arranged on the circumferential wall of the second heat-insulating cylinder 52, and the upper and lower edges of the liquid outlet 521 are higher than the upper end surface of the thermostatic cylinder 40 in the assembled state. In this way, the liquid level of the heat-conducting medium 11 in the predetermined gap 54 between the second heat-insulating cylinder 52 and the first heat-insulating cylinder 51 will be higher than the liquid level of the heat-conducting medium 11 in the thermostatic cylinder 40, so as to ensure the stability and consistency of the temperature of the heat-conducting medium 11 in the thermostatic cylinder 40. Alternatively, the lower edge of the liquid outlet 521 can also be set to be equal to the upper end surface of the thermostatic cylinder 40.

[0041] Figure 4 1 is a schematic structural diagram of a second embodiment of the thermostatic cylinder 40 and the heat preservation cylinder 50 of the thermostatic device 1 of the present invention. Figure 4As shown, in one or more embodiments, the plurality of heat preservation tubes 50 include a first heat preservation tube 51, a third heat preservation tube 53 and a second heat preservation tube 52 which are sequentially sleeved on the constant temperature tube 40. That is, the third heat preservation tube 53 is located between the first heat preservation tube 51 and the second heat preservation tube 52. The arrangement of the third heat preservation tube 53 can increase the number of layers of the heat preservation tube 50 and further improve the temperature stability of the heat-conducting medium 11 in the constant temperature tube 40. In one or more embodiments, the third heat preservation tube 53 has the same symmetrical central axis as the constant temperature tube 40, the first heat preservation tube 51 and the second heat preservation tube 52, so that the heat-conducting medium 11 can be evenly distributed. The third heat preservation tube 53 can be arranged in a cylindrical shape, a square cylinder shape or other suitable shapes. The third heat preservation tube 53 can be made of suitable transparent materials, such as glass, resin, etc., so as to observe the sample to be processed. In one or more embodiments, the third heat preservation tube 53, the second heat preservation tube 52, the first heat preservation tube 51 and the constant temperature tube 40 are detachably connected to improve the convenience of the constant temperature device 1. A predetermined gap 54 is also spaced between the third heat-insulating barrel 53 and the first heat-insulating barrel 51, and between the second heat-insulating barrel 52 and the third heat-insulating barrel 53. A liquid guide hole 531 is provided on the third heat-insulating barrel 53 to connect the predetermined gaps 54 between the heat-insulating barrels 50. In one or more embodiments, the liquid guide hole 531 is provided at the bottom of the third heat-insulating barrel 53. Further, the liquid guide hole 531 and the perforation 522, the liquid inlet 511, the constant temperature barrel 40, the first heat-insulating barrel 51 and the second heat-insulating barrel 52 also have the same symmetrical central axis to improve the uniformity of the flow of the heat-conducting medium 11, and the liquid guide hole 531 can also be used as a through hole allowing the liquid inlet pipe 60 to pass therethrough (that is, the diameter of the liquid guide hole 531 is greater than the outer diameter of the liquid inlet pipe 60). It should be pointed out that the number and arrangement position of the liquid guide hole 531 can also be adjusted according to actual needs, as long as the predetermined gaps 54 between the heat-insulating barrels 50 can be connected. In one or more embodiments, the upper end surface of the third heat-insulating barrel 53 is equal to the upper end surface of the second heat-insulating barrel 52 in the assembled state, so that the liquid level of the heat-conducting medium 11 between the third heat-insulating barrel 53 and the first heat-insulating barrel 51 is higher than the liquid level of the heat-conducting medium 11 in the constant temperature barrel 40, thereby ensuring the heat-insulating effect. Alternatively, the upper end surface of the third heat-insulating barrel 53 may also be slightly lower than the upper end surface of the second heat-insulating barrel 52 and higher than the upper end surface of the first heat-insulating barrel 51 in the assembled state.

[0042] Continue to see Figure 4When the heat-conducting medium 11 flows in from the liquid inlet 511, the heat-conducting medium 11 first enters the predetermined gap 54 between the first heat-insulating cylinder 51 and the constant temperature cylinder 40; when the predetermined gap 54 between the first heat-insulating cylinder 51 and the constant temperature cylinder 40 is filled with the heat-conducting medium 11, the heat-conducting medium 11 will flow to the constant temperature cylinder 40 and then fill the entire constant temperature cylinder 40; when the constant temperature cylinder 40 is filled with the heat-conducting medium 11, the heat-conducting medium 11 will overflow from the first heat-insulating cylinder 51 and flow to the predetermined gap 54 between the third heat-insulating cylinder 53 and the first heat-insulating cylinder 51. Since the third heat-insulating tube 53 is provided with a liquid conducting hole 531, the heat-conducting medium 11 can flow from the heat-conducting hole to the predetermined gap 54 between the second heat-insulating tube 52 and the third heat-insulating tube 53. As the heat-conducting medium 11 continues to flow, the heat-conducting medium 11 will fill the predetermined gap 54 between the second heat-insulating tube 52 and the third heat-insulating tube 53 and the predetermined gap 54 between the third heat-insulating tube 53 and the first heat-insulating tube 51.

[0043] It should be noted that the parts not mentioned in the second embodiment may be configured the same as those in the first embodiment and will not be described in detail here.

[0044] Figure 5 1 is a schematic structural diagram of a third embodiment of a thermostatic cylinder and a heat preservation cylinder of a thermostatic device of the present invention. Figure 5 As shown, in one or more embodiments, the plurality of insulation barrels 50 include a first insulation barrel 51, two third insulation barrels 53 and a second insulation barrel 52 which are sequentially sleeved on the constant temperature barrel 40. That is, the two third insulation barrels 53 are respectively located between the first insulation barrel 51 and the second insulation barrel 52. The two insulation barrels 50 are sequentially spaced apart along the radial direction of the constant temperature barrel 40. Alternatively, the number of third insulation barrels 53 can also be set to 3, 4 or other suitable numbers. The provision of multiple third insulation barrels 53 can further increase the number of layers of the insulation barrels 50 and improve the temperature stability of the heat-conducting medium 11 in the constant temperature barrel 40. A liquid guide hole 531 is provided on each third insulation barrel 53 to connect the predetermined gap 54 between the insulation barrels 50. In one or more embodiments, the liquid conducting holes 531 on each third insulation cylinder 53 have the same symmetrical central axis as the through hole 522, the liquid inlet 511, the constant temperature cylinder 40, the first insulation cylinder 51 and the second insulation cylinder 52 to improve the uniformity of the flow of the heat transfer medium 11.

[0045] It should be noted that the parts not mentioned in the third embodiment may be configured the same as those in the first and second embodiments, and will not be described in detail herein.

[0046] like Figure 1As shown, in one or more embodiments, the thermostatic device 1 of the present invention further includes a controller 100. The controller 100 is connected to the temperature control mechanism 30 in a communication manner to automatically control the heater 31, refrigerator 32, agitator 33, cooling fan 34 and other components in the temperature control mechanism 30. In one or more embodiments, the controller 100 is detachably connected to the temperature control mechanism 30 to improve the convenience of the thermostatic device 1 and meet the actual needs of different test scenarios. In one or more embodiments, the controller 100 can also be connected to the first temperature sensor 12, the second temperature sensor 41, the liquid level sensor 13, the liquid inlet pump 80, the liquid return pump 90 and other components to further improve the level of automated control and achieve precision control. The communication connection can be wired, wireless, and the like.

[0047] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A constant temperature device (1), characterized in that: The constant temperature device (1) comprises: A liquid storage chamber (10), wherein a heat-conducting medium (11) is arranged in the liquid storage chamber (10); A temperature control mechanism (30), the temperature control mechanism (30) being used to adjust the temperature of the heat conducting medium (11); A constant temperature cylinder (40) and a plurality of heat-insulating cylinders (50), wherein the plurality of heat-insulating cylinders (50) are sequentially sleeved outside the constant temperature cylinder (40) and form predetermined gaps (54) between each other, and the plurality of heat-insulating cylinders (50) are configured to form fluid communication with the liquid storage chamber (10) to allow the heat-conducting medium (11) to flow into the constant temperature cylinder (40) through the predetermined gaps (54) and fill the predetermined gaps (54) and the constant temperature cylinder (40).

2. The thermostatic device (1) according to claim 1, characterized in that: The plurality of heat-insulating cylinders (50) include: a first heat-insulating cylinder (51), the first heat-insulating cylinder (51) being close to the constant-temperature cylinder (40) and having a liquid inlet (511) communicating with the liquid storage chamber (10), and an upper end surface of the first heat-insulating cylinder (51) being higher than an upper end surface of the constant-temperature cylinder (40) in an assembled state; and A second heat-insulating cylinder (52), the second heat-insulating cylinder (52) is away from the constant temperature cylinder (40) and is provided with a liquid outlet (521) which is in communication with the liquid storage chamber (10), and in the assembled state, the upper end surface of the second heat-insulating cylinder (50) is higher than the upper end surface of the first heat-insulating cylinder (51).

3. The thermostatic device (1) according to claim 2, characterized in that: In the assembled state, the lower edge of the liquid outlet (521) is higher than or equal to the upper end surface of the constant temperature cylinder (40); and / or The plurality of heat-insulating cylinders (50) further include: a third heat-insulating cylinder (53), the third heat-insulating cylinder (53) being located between the first heat-insulating cylinder (51) and the second heat-insulating cylinder (52) (50), and having a liquid guide hole (531) connected to the predetermined gap (54) formed on the third heat-insulating cylinder (53).

4. The thermostatic device (1) according to claim 3, characterized in that: The liquid inlet (511) is located at the bottom of the first thermal insulation tube (51); and / or the liquid guide hole (531) is located at the bottom of the third thermal insulation tube (53); and / or in the assembled state, the upper end surface of the third thermal insulation tube (53) is equal to the upper end surface of the second thermal insulation tube (52).

5. The thermostatic device (1) according to claim 4, characterized in that: The liquid guiding hole (531) and the liquid inlet (511) have the same central axis of symmetry.

6. The thermostatic device (1) according to claim 5, characterized in that: The number of the third heat-insulating cylinders (53) is plural, and the plurality of heat-insulating cylinders (50) are spaced apart in sequence along the radial direction of the constant temperature cylinder (40).

7. The thermostatic device (1) according to claim 1, characterized in that: The temperature control mechanism (30) comprises a heater (31) for heating the heat-conducting medium (11) in the liquid storage chamber (10) and a refrigerator (32) for cooling the heat-conducting medium (11) in the liquid storage chamber (10).

8. The thermostatic device (1) according to claim 7, characterized in that: The heater (31) is one or more of a resistive heater (31), a heat pump heater (31), a microwave heater (31) and a far-infrared heater (31); and / or The refrigerator (32) is one or more of a heat pump refrigerator (32), an absorption refrigerator (32), and a semiconductor refrigerator (32); and / or The temperature control mechanism (30) further comprises a stirrer (33) arranged in the liquid storage chamber (10) and used for stirring the heat-conducting medium (11).

9. The thermostatic device (1) according to claim 1, characterized in that: The liquid storage chamber (10) and the plurality of heat preservation cylinders (50) are respectively connected to each other by a liquid inlet pipe (60) and a liquid return pipe (70); and A liquid inlet pump (80) is provided on the liquid inlet pipe (60), and / or a liquid return pump (90) is provided on the liquid return pipe (70); and / or both the liquid inlet pipe (60) and the liquid return pipe (70) are heat-insulating pipes.

10. The thermostatic device (1) according to any one of claims 1 to 9, characterized in that: A first temperature sensor (12) is provided in the liquid storage chamber (10); and / or A liquid level sensor (13) is provided in the liquid storage chamber (10); and / or A second temperature sensor (41) is provided in the constant temperature cylinder (40); and / or The constant temperature cylinder (40) and the heat preservation cylinder (50) are made of transparent material; and / or The constant temperature cylinder (40) and the heat preservation cylinder (50) are made of metal material, and observation windows are provided on the constant temperature cylinder (40) and the heat preservation cylinder (50); The constant temperature device (1) further comprises a heat preservation chamber (20) enclosing the liquid storage chamber (10), and a heat preservation material is provided between the heat preservation chamber (20) and the liquid storage chamber (10); and / or The constant temperature device (1) further comprises a controller (100) in communication connection with the temperature control mechanism (30); and / or The liquid storage chamber (10), the constant temperature cylinder (40) and the plurality of heat preservation cylinders (50) are all detachably connected; and / or The controller (100) and the temperature control mechanism (30) are detachably connected.

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