Water bath system

Abstract

The invention relates to a heat preservation system, and discloses a water bath system. Comprising a control unit, a water bath, a thermal circulation structure, a gravity sensing unit, a timing unit and a circulation jacket arranged outside the water bath, and the thermal circulation structure comprises a heating unit arranged between the circulation jacket and the water bath; liquid between the circulating jacket and the water bath and liquid in the water bath can form a circulating liquid path; the number of the heating units is at least two, and the at least two heating units are arranged between the circulating jacket and the water bath from bottom to top. The water bath system can effectively improve the heating uniformity.

Description

Technical Field

[0001] The invention relates to a heat preservation system, in particular to a water bath system. Background Art

[0002] Constant temperature water bath system is widely used in drying, concentration, distillation, impregnation of chemical reagents, impregnation of drugs and biological preparations, etc. It can also be used for water bath constant temperature heating and other temperature tests. It is an essential tool for education and scientific research in biology, genetics, virus, aquaculture, environmental protection, medicine, health, biochemical laboratories, and analysis rooms.

[0003] The existing constant temperature water bath is provided with a heating tube inside, through which the medium is heated. Generally, the heating tube is arranged at the lower part of the water bath. During the heating process, the temperature of the medium near the heating tube is higher, and the temperature of the liquid medium far from the heating tube is lower. The temperature of the heated medium is not uniform, which affects the water bath effect. In order to solve the problem of uneven temperature, it is usually necessary to set a water stirring device inside the constant temperature water bath to force stirring to speed up the flow of water in the constant temperature water bath and try to achieve the uniformity of water temperature in the constant temperature water bath. However, it will also require the addition of a stirring device and occupy the water bath space in the constant temperature water bath. The stirring of the water will also affect the measuring container in the constant temperature water bath device. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem of uneven temperature of the heating medium in the prior art and to provide a water bath system which can effectively improve the uniformity of heating.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a water bath system, comprising a water bath, a thermal circulation structure and a circulation jacket arranged outside the water bath, the thermal circulation structure comprising a heating unit arranged between the circulation jacket and the water bath, the liquid between the circulation jacket and the water bath and the liquid in the water bath form a circulation liquid path through the thermal circulation structure; at least two heating units are provided, and at least two of the heating units are arranged between the circulation jacket and the water bath along a direction from bottom to top.

[0006] Preferably, the system also includes a control unit, a gravity sensing unit and a timing unit. The gravity sensing unit is suitable for detecting the gravity of the reaction container. The control unit is respectively connected to the gravity sensing unit and the timing unit so as to control the operation of the timing unit according to the gravity changes detected by the gravity sensing unit and record the time when the timing unit stops working.

[0007] Preferably, the control unit controls the operation of the timing unit according to the gravity change detected by the gravity sensing unit in the following manner: when the gravity detected by the gravity sensing unit starts to increase from a stable value, the control unit controls the timing unit to start timing; when the gravity detected by the gravity sensing unit starts to decrease from a stable value, the control unit controls the timing unit to stop working.

[0008] Preferably, a reaction vessel fixing rack is arranged in the water bath, and the gravity sensing unit comprises a first gravity sensing unit, which is arranged on the reaction vessel fixing rack and is suitable for detecting the gravity of the reaction vessel on the reaction vessel fixing rack.

[0009] Preferably, the gravity sensing unit also includes a second gravity sensing unit, which is arranged at the bottom of the reaction container so as to detect the gravity in the reaction container. The control unit controls the operation of the timing unit according to the gravity change detected by the gravity sensing unit: when the gravity detected by the first gravity sensing unit and the second gravity sensing unit both start to increase from a stable value, the control unit controls the timing unit to start timing; when the gravity detected by the first gravity sensing unit and / or the second gravity sensing unit starts to decrease from a stable value, the control unit controls the timing unit to stop working.

[0010] Preferably, the thermal cycle structure further comprises a circulation drive unit connected between the circulation jacket and the water bath, and the liquid between the circulation jacket and the water bath and the liquid in the water bath form a circulation liquid circuit through the circulation drive unit.

[0011] Preferably, one end of the circulation drive unit is connected to the circulation jacket, and the other end is connected to the water bath, so as to be able to transport the liquid between the circulation jacket and the water bath into the water bath, and to transport the liquid in the water bath to between the circulation jacket and the water bath.

[0012] Further preferably, one end of the circulation drive unit is connected to the upper part of the side wall of the circulation jacket, and the other end is connected to the lower part of the side wall of the water bath.

[0013] Preferably, it further comprises a transparent box with an opening at the bottom, the transparent box is sleeved outside the water bath or arranged on the top of the water bath, and the side of the transparent box is provided with air holes.

[0014] Preferably, the longitudinal section of the top of the transparent box is ∧-shaped.

[0015] Preferably, the water bath is further provided with a temperature sensing unit for detecting the temperature of the liquid in the water bath, and the control unit is connected to the temperature sensing unit to receive the temperature detected by the temperature sensing unit and control the operation of the heating unit according to the temperature.

[0016] Through the above technical solution, the water bath system provided by the present invention can heat multiple parts simultaneously by providing at least two heating units, and arranging the at least two heating units between the circulation jacket and the water bath from bottom to top, thereby ensuring that the temperature in the water bath quickly reaches uniformity. By separating the heat circulation structure from the water bath and arranging a circulation jacket outside, the heating liquid in the circulation jacket can keep the water bath warm, thereby further ensuring the uniformity of the temperature in the water bath.

[0017] In addition, separating the thermal cycle structure from the water bath can also reduce the impact of water flow or large-scale shaking caused by uneven water temperature or the need to stir the liquid in the water bath to achieve uniform water temperature, which can affect the measuring container set in the water bath and cause measurement errors. While improving the detection accuracy, it also improves the stability of the temperature in the detection area, and the available space for the water bath becomes larger. Since the water bath system adopts a design that separates the thermal cycle structure from the water bath, it provides a static constant temperature water bath foundation for the water bath, reducing the impact of water flow on the signal detection of the gravity sensing unit. The control unit can control the operation of the timing unit according to the gravity of the reaction container detected by the gravity sensing unit and record the time recorded when the timing unit stops working. There is no error in artificial reaction time, which further improves the accuracy of detection.

[0018] Furthermore, through the setting of the circulation drive unit and the circulation jacket, the heating and constant temperature unit (heating and water stirring) of the traditional constant temperature water bath is changed to be built into the water bath and integrated with the water bath. While reducing the influence of water flow on the signal detection of the gravity sensor unit, the uniformity of water temperature is further improved, and static and constant temperature water bath heating can be realized.

[0019] Other advantages of the present invention and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic structural diagram of a water bath system according to a specific embodiment of the present invention;

[0022] Figure 2It is a schematic structural diagram of a water bath system according to a specific embodiment of the present invention.

[0023] Description of Reference Numerals

[0024] 1 Water bath 2 Thermal cycle structure

[0025] 3 Gravity sensor unit 4 Timing unit

[0026] 5 Temperature sensing unit 6 Transparent box

[0027] 7 Reaction vessel fixing frame 8 Circulation jacket

[0028] 21 Heating unit 22 Circulation drive unit DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection" and "connected" 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, or an indirect connection through an intermediate medium, it can be abutment, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] It should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0032] In a basic embodiment of the present invention, Figure 1 and Figure 2As shown, a water bath system is provided, including a water bath 1, a thermal circulation structure 2 and a circulation jacket 8 arranged outside the water bath 1, the thermal circulation structure 2 includes a heating unit 21 arranged in the circulation jacket 8, and the liquid between the circulation jacket 8 and the water bath 1 and the liquid in the water bath 1 (for example, water, heat transfer oil, etc., water is used as an example below) form a circulation liquid path through the thermal circulation structure 2; at least two heating units 21 are provided, and at least two heating units 21 are arranged between the circulation jacket 8 and the water bath 1 along the direction from bottom to top.

[0033] Exemplarily, one of the heating units 21 is disposed in the lower middle portion between the circulation jacket 8 and the water bath 1 , one of the heating units 21 is disposed in the upper middle portion between the circulation jacket 8 and the water bath 1 , and other possible heating units 21 may be disposed between these two heating units 21 .

[0034] According to the present invention, the shape of the water bath 1 is not particularly limited, and its cross section can be rectangular or circular. The bottom of the circulation jacket 8 is connected to the water bath 1 so that liquid can be contained between the circulation jacket 8 and the water bath 1. The circulation jacket 8 and the water bath 1 can be integrally formed, or separately formed. When the circulation jacket 8 and the water bath 1 are separately formed, when in use, the water bath 1 is placed in the circulation jacket 8, and the heating unit 21 is placed between the circulation jacket 8 and the water bath 1. The heating unit 21 can be a heating rod, and the shape of the heating unit 21 is not particularly limited. Preferably, the heating unit 21 is annular, and the heating unit 21 is sleeved on the outside of the water bath 1, and can perform surrounding heating on the liquid between the circulation jacket 8 and the water bath 1. The liquid around the annular heating unit 21 can be heated synchronously, and the heat distribution is more uniform. The heat between the circulation jacket 8 and the water bath 1 is quickly transferred through the thermal circulation structure 2 to improve the heating efficiency of the heating unit 21.

[0035] During actual use, the liquid height in the water bath 1 shall not be higher than the liquid height between the water bath 1 and the circulation jacket 8. A plurality of small holes may be provided on the wall of the water bath 1 to promote water circulation in the two spaces and directly realize rapid heat transfer between the circulation jacket 8 and the water bath 1.

[0036] The water bath system provided by the above basic embodiment of the present invention has at least two heating units 21, and the at least two heating units 21 are arranged between the circulation jacket 8 and the water bath 1 from bottom to top, which can achieve simultaneous heating and synchronous heating of the same layer of liquid in multiple parts, thereby ensuring that the liquid in the water bath 1 is quickly heated and the temperature uniformity is quickly achieved. By separating the thermal circulation structure from the water bath, the temperature uniformity in the water bath can be further ensured.

[0037] When vinyl acetate monomer and initiator are mixed to prepare polymers, the initiation time needs to be determined in advance. The length of the initiation time indicates the amount of polymerization-inhibiting impurities in the vinyl acetate monomer. However, the method for measuring the initiation time of vinyl acetate monomer in the prior art is generally a manual timing method. The manual timing method starts when vinyl acetate monomer and initiator are mixed and added to a water bath, and ends when bubbles appear in the mixture. However, this timing method includes manual reaction time, so the accuracy of the measurement needs to be improved, which is something that researchers have not considered.

[0038] In a specific embodiment of the present invention, the system also includes a control unit, a gravity sensing unit 3 and a timing unit 4. The gravity sensing unit 3 is suitable for detecting the gravity of the reaction container. The control unit is respectively connected to the gravity sensing unit 3 and the timing unit 4 so as to control the operation of the timing unit 4 according to the gravity changes detected by the gravity sensing unit 3 and record the time when the timing unit 4 stops working.

[0039] According to the present invention, the gravity sensing unit 3 may be a sensor capable of detecting gravity, such as a gravity sensor or a weighing sensor, and the timing unit 4 may be a timer or other tools capable of realizing timing.

[0040] The water bath system can be used in any occasion where timing is required based on gravity or mass changes, such as the determination of the initiation time of a reaction container containing a vinyl acetate monomer due to the generation of gas caused by the initiation reaction of vinyl acetate monomer, or other possible initiation reaction. It is preferably used in the determination of the initiation time of the initiation reaction of vinyl acetate monomer. The following takes the determination of the initiation time of the initiation reaction of vinyl acetate monomer as an example.

[0041] When the water bath system provided by the above embodiment of the present invention is used for the initiation reaction test of vinyl acetate monomer, the thermal circulation structure 2 works, and the heating unit 21 arranged between the circulation jacket 8 and the water bath 1 heats the liquid (for example, water) between the circulation jacket 8 and the water bath 1. Since the liquid between the circulation jacket 8 and the water bath 1 and the liquid in the water bath 1 form a circulation liquid path through the thermal circulation structure 2, the liquid in the water bath 1 can be heated by circulation. After the liquid in the water bath 1 is heated to a suitable temperature (the temperature can be determined by the experimenter according to actual conditions), the material (for example, vinyl acetate monomer) is added to the reaction container and the reaction container is placed in the liquid in the water bath 1. During the process of adding the material, the gravity sensing unit 3 will detect that the gravity of the reaction container has changed. At this time, the control unit controls the timing unit 4 to work. When the vinyl acetate monomer undergoes an initiation reaction, bubbles will be generated and discharged. At this time, the gravity of the material is reduced to a certain extent. The control unit controls the timing unit 4 to stop timing and records the time recorded when the timing unit 4 stops working.

[0042] In traditional constant temperature water baths, the heating coil is built into the water bath, resulting in higher water temperature near the heating coil and lower temperature away from the coil. In order to achieve the purpose of constant temperature water bath, it is necessary to add a water stirring device to the water bath. Although this device can achieve the advantages of rapid heat dispersion and uniform water temperature, it can also cause water fluctuation problems.

[0043] The water bath system provided by the above basic embodiment of the present invention can ensure the uniformity of the temperature in the water bath 1 by forming a circulating liquid circuit with the liquid between the circulating jacket 8 and the water bath 1 and the liquid in the water bath 1, and can also prevent the liquid in the water bath 1 from shaking greatly, causing the reaction container to vibrate and affecting the measurement error caused by the gravity sensor unit 3 receiving the wrong signal, and can improve the stability of the temperature in the detection area while improving the detection accuracy. In addition, since there is no need to set a water stirring device, the available space of the water bath becomes larger. On the basis of the thermal cycle structure 2, the control unit can control the operation of the timing unit 4 according to the gravity of the reaction container detected by the gravity sensor unit 3 and record the time recorded when the timing unit 4 stops working, and determine the time when the vinyl acetate monomer triggers the reaction according to the change in gravity. There is no error in the artificial reaction time and the error in the artificial observation of whether the reaction is carried out, which further improves the accuracy of the detection.

[0044] In a specific embodiment of the present invention, the control unit controls the operation of the timing unit 4 according to the change of gravity detected by the gravity sensing unit 3 in the following manner: when the gravity detected by the gravity sensing unit 3 starts to increase from a stable value, the control unit controls the timing unit 4 to start timing; when the gravity detected by the gravity sensing unit 3 starts to decrease from a stable value, the control unit controls the timing unit 4 to stop working. The above manner can accurately determine the time when the initiation reaction of the vinyl acetate monomer is detected, without the error of the artificial reaction time, and further improve the accuracy of the detection.

[0045] In actual use, since gravity is measured in the liquid phase, the buoyancy problem must be considered when the gravity sensor unit 3 detects. That is to say, the gravity detected by the gravity sensor unit 3 can be converted to the actual gravity of the object to be detected.

[0046] According to the present invention, the above-mentioned stable value can be a detection value of the gravity sensing unit that remains unchanged within a specific time, and the specific time can be determined by the tester according to the actual situation, and can be specifically set to 30s, 1min, 2min, 3min, 4min or 5min, etc. Specifically, when the gravity detected by the gravity sensing unit 3 starts to increase from a stable value, the control unit controls the timing unit 4 to start timing, and the stable value at this time can be the gravity of the reaction container; when the gravity detected by the gravity sensing unit 3 starts to decrease from a stable value, the control unit controls the timing unit 4 to stop working, and the stable value at this time can be the sum of the gravity of the reaction container and the initial material.

[0047] As a specific embodiment of the present invention, a reaction vessel fixing rack 7 is arranged in the water bath 1, and the gravity sensing unit 3 includes a first gravity sensing unit, which is arranged on the reaction vessel fixing rack 7 and is suitable for detecting the gravity of the reaction vessel on the reaction vessel fixing rack 7.

[0048] During actual use, the reactants can be first injected into the reaction container, and then the reaction container can be placed on the reaction container fixing frame 7. The control unit can control the operation of the timing unit 4 according to the gravity changes detected by the first gravity sensor unit and record the time when the timing unit 4 stops working.

[0049] As another embodiment of the present invention, the gravity sensing unit 3 further includes a second gravity sensing unit, which is arranged at the bottom of the reaction container to detect the gravity in the reaction container, and the control unit controls the operation of the timing unit 4 according to the gravity change detected by the gravity sensing unit 3. The method includes: when the gravity detected by the first gravity sensing unit and the second gravity sensing unit both start to increase from a stable value, the control unit controls the timing unit 4 to start timing; when the gravity detected by the first gravity sensing unit and / or the second gravity sensing unit starts to decrease from a stable value, the control unit controls the timing unit 4 to stop working. The above method can accurately determine the initial time, thereby further improving the detection accuracy.

[0050] During actual use, the reactants can be injected into the reaction container first, at which time the second gravity sensing unit detects the gravity change, and then the reaction container is placed on the reaction container fixing frame 7, and then the first gravity sensing unit detects the gravity change, which can ensure that the material has been added to the reaction container and the reaction container has been placed in the water bath 1.

[0051] The thermal cycle structure 2 may include a circulation drive unit 22, or may not include the circulation drive unit 22 and perform circulation heat exchange through the temperature difference and diffusion of the liquid. In order to improve the heat exchange effect, as a specific embodiment of the present invention, the thermal cycle structure 2 also includes a circulation drive unit 22 connected to the circulation jacket 8, and the liquid between the circulation jacket 8 and the water bath 1 and the liquid in the water bath 1 form a circulation liquid path through the circulation drive unit 22.

[0052] The circulation drive unit 22 can be any device that can circulate water in the water bath 1 and the circulation jacket 8, and can be a circulation pump, which can be connected to the water bath 1 and the circulation jacket 8 through a pipeline. The circulation pump can be a micro pump with a power less than or equal to 10W. Preferably, the power of the circulation pump is 5-7W, which will not affect the circulation of the liquid, and can also avoid excessive fluctuations in the water flow caused by excessive power, which affects the detection of the gravity sensor unit 3.

[0053] The arrangement of the circulation drive unit 22 can further improve the uniformity of the temperature in the water bath 1 without causing fluctuations in the water flow, thereby ensuring the detection accuracy of the gravity sensor unit 3 .

[0054] As a specific embodiment of the present invention, one end of the circulation drive unit 22 is connected to the circulation jacket 8, and the other end is connected to the water bath 1, so that the liquid between the circulation jacket 8 and the water bath 1 can be transported into the water bath 1, and the liquid in the water bath 1 can be transported between the circulation jacket 8 and the water bath 1, so that the liquid in the water bath 1 and the liquid between the circulation jacket 8 and the water bath 1 form a circulating liquid flow. Specifically, one end of the circulation drive unit 22 is connected to the space between the circulation jacket 8 and the water bath 1, and the other end is connected to the water bath 1. Through the above arrangement, the liquid in the water bath 1 and the liquid between the circulation jacket 8 and the water bath 1 can form a circulating liquid flow, which can not only continuously heat the liquid in the water bath 1, but also improve the uniformity of the temperature of the liquid in the water bath 1, thereby improving the effect of the constant temperature water bath, and can also play the effect of heat preservation and heat prevention on the liquid in the water bath 1.

[0055] As another specific embodiment of the present invention, one end of the circulation drive unit 22 is connected to the upper part of the side wall of the circulation jacket 8, and the other end is connected to the lower part of the side wall of the water bath 1. It can reduce the fluctuation of the liquid, and at the same time improve the heat exchange effect, ensuring the uniformity of the liquid temperature in the water bath 1.

[0056] In a specific embodiment of the present invention, a transparent box 6 with an opening at the bottom is further included, and the transparent box 6 is sleeved outside the water bath 1 or arranged on the top of the water bath 1, and a vent hole is arranged on the transparent box 6. The use of the transparent box 6 can ensure the temperature of the constant temperature placement environment and reduce the influence of environmental factors on the water bath temperature. The provision of the vent hole can achieve the purpose of controlling the displacement.

[0057] In a specific embodiment of the present invention, the longitudinal section of the top of the transparent box 6 is ∧-shaped. Specifically, the top of the transparent box 6 can be conical, pyramidal or triangular prism placed on its side. When the triangular prism is placed on its side, the top view is rectangular, the front view and the rear view are rectangular, and the left view and the right view are triangular. Setting the longitudinal section of the top of the transparent box 6 to ∧-shaped can prevent the condensation of water bath steam from causing droplets to fall and contaminate sample analysis. There are no major requirements for the shape of the transparent box 6. Preferably, the shape of the transparent box 6 corresponds to the shape of the water bath 1. For example, if the cross-section of the water bath 1 is circular, the transparent box 6 can be set to a cylindrical shape with a conical top.

[0058] Specifically, the transparent box 6 is provided with an openable window for conveniently taking out the sample. The transparent box 6 may also be provided with an exhaust fan, through which the effect of gas replacement can be achieved. The exhaust fan may be a micro exhaust fan.

[0059] In a specific embodiment of the present invention, the water bath 1 is further provided with a water bath cover, and an opening suitable for inserting the reaction vessel fixing frame 7 is provided on the water bath cover. The purpose of the water bath cover is to play a role in heat preservation. The water bath cover can be a glass molded part or a transparent plastic molded part, preferably a transparent plastic molded part, which can reduce weight and cost while keeping warm, and reduce its pressure on the water bath 1.

[0060] In a specific embodiment of the present invention, a temperature sensing unit 5 for detecting the temperature of the liquid in the water bath 1 is also provided in the water bath 1, and the control unit is connected to the temperature sensing unit 5 to receive the temperature detected by the temperature sensing unit 5 and control the operation of the heating unit 21 according to the temperature. Specifically, a preset temperature is first set by the control unit. When the temperature detected by the temperature sensing unit 5 is less than the preset temperature, the control unit controls the heating unit 21 to continue to work. When the temperature detected by the temperature sensing unit 5 is greater than or equal to the preset temperature, the control unit controls the heating unit 21 to stop working. Through the above-mentioned setting, the temperature in the water bath 1 can be accurately controlled.

[0061] As a relatively preferred embodiment of the present invention, see Figure 1 and Figure 2, a water bath system is provided, comprising a control unit, a water bath 1, a thermal cycle structure 2, a gravity sensor unit 3, a timing unit 4, a temperature sensor unit 5, a transparent box 6 with an opening at the bottom, and a circulation jacket 8 arranged outside the water bath 1, wherein the transparent box 6 is sleeved outside the water bath 1 or arranged on the top of the water bath 1, and an air vent is arranged on the transparent box 6, and the longitudinal section of the top of the transparent box 6 is ∧-shaped; the thermal cycle structure 2 comprises a circulation drive unit 22 connected to the circulation jacket 8 and a temperature sensor arranged between the circulation jacket 8 and the water bath. 1, the heating unit 21 is provided with at least two, at least two heating units 21 are arranged between the water bath 1 and the circulation jacket 8, at least two heating units 21 are arranged between the water bath 1 and the circulation jacket 8 along the direction from bottom to top, one end of the circulation drive unit 22 is connected to the upper part of the circulation jacket 8, and the other end is connected to the lower part of the water bath 1, so as to be able to transport the liquid between the circulation jacket 8 and the water bath 1 to the water bath 1, and transport the liquid in the water bath 1 to the circulation jacket 8 and the water bath 1. to form a circulating liquid circuit; a reaction vessel fixing rack 7 is arranged in the water bath 1, and the gravity sensing unit 3 includes a first gravity sensing unit and a second gravity sensing unit, the first gravity sensing unit is arranged on the reaction vessel fixing rack 7 and is suitable for detecting the gravity of the reaction vessel on the reaction vessel fixing rack 7, and the second gravity sensing unit is arranged at the bottom of the reaction vessel to be able to detect the gravity in the reaction vessel; the control unit is connected to the first gravity sensing unit, the second gravity sensing unit and the timing unit 4 respectively, when the gravity detected by the first gravity sensing unit and the second gravity sensing unit both start to increase from a stable value, the control unit controls the timing unit 4 to start timing; when the gravity detected by the first gravity sensing unit and / or the second gravity sensing unit starts to decrease from a stable value, the control unit controls the timing unit 4 to stop working and records the time recorded when the work is stopped; the temperature sensing unit 5 is used to detect the temperature of the liquid in the water bath 1, and the control unit is connected to the temperature sensing unit 5 to receive the temperature detected by the temperature sensing unit 5 and control the operation of the heating unit 21 according to the temperature.

[0062] When the water bath system provided by the above preferred embodiment is working, the water in the water bath 1 is first heated by the heat circulation structure 2. When it is heated to a suitable temperature, the material is injected into the reaction container. At this time, the second gravity sensing unit detects the gravity change, and then the reaction container is placed on the reaction container fixing frame 7. At this time, the first gravity sensing unit detects the gravity change. At this time, the control unit controls the timing unit 4 to work. When gas is generated, the first gravity sensing unit and the second gravity sensing unit will detect the gravity change. At this time, the control unit controls the timing unit 4 to stop timing, and records the time recorded when the timing unit 4 stops working, which is the triggering time.

[0063] The water bath system provided in the above preferred embodiment can ensure the uniformity of the liquid temperature in the water bath 1 through the arrangement of the circulation drive unit 22 and the circulation jacket 8, reduce the measurement error caused by uneven water temperature or large-scale shaking of the liquid in the water bath, improve the stability of the temperature in the detection area while improving the detection accuracy, thereby ensuring the accuracy and reproducibility of the analysis value of the vinyl acetate activity (vinyl acetate initiation foaming time), and further provide accurate data support for the quality and efficiency improvement of product production. Since the present invention does not have a stirring device, the available space of the water bath 1 becomes larger. On the basis of the thermal cycle structure 2, the control unit can control the operation of the timing unit 4 according to the gravity and its change of the reaction container detected by the gravity sensing unit 3 and record the time recorded when the timing unit 4 stops working, and determine the time when the vinyl acetate monomer initiates the reaction according to the change of the gravity. There is no error in the artificial reaction time, and the detection accuracy is further improved. The use of the transparent box 6 can ensure the temperature of the constant temperature placement environment, greatly reduce the influence of environmental factors on the water bath temperature, and do not affect the observation of the inside of the water bath.

[0064] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0065] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0066] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A water bath system, characterized in that: The invention comprises a water bath (1), a thermal circulation structure (2), and a circulation jacket (8) arranged outside the water bath (1); the thermal circulation structure (2) comprises a heating unit (21) arranged between the circulation jacket (8) and the water bath (1); the liquid between the circulation jacket (8) and the water bath (1) and the liquid in the water bath (1) form a circulation liquid path through the thermal circulation structure (2); at least two heating units (21) are provided, and at least two heating units (21) are arranged between the circulation jacket (8) and the water bath (1) in a direction from bottom to top.

2. The water bath system according to claim 1, characterized in that: The system further comprises a control unit, a gravity sensing unit (3) and a timing unit (4); the gravity sensing unit (3) is suitable for detecting the gravity of the reaction container; the control unit is respectively connected to the gravity sensing unit (3) and the timing unit (4) so ​​as to be able to control the operation of the timing unit (4) according to the gravity change detected by the gravity sensing unit (3) and record the time when the timing unit (4) stops working.

3. The water bath system according to claim 2, characterized in that: The control unit controls the operation of the timing unit (4) according to the change in gravity detected by the gravity sensing unit (3) in the following manner: when the gravity detected by the gravity sensing unit (3) starts to increase from a stable value, the control unit controls the timing unit (4) to start timing; when the gravity detected by the gravity sensing unit (3) starts to decrease from a stable value, the control unit controls the timing unit (4) to stop working.

4. The water bath system according to claim 3, characterized in that: A reaction vessel fixing rack (7) is arranged in the water bath (1), and the gravity sensing unit (3) comprises a first gravity sensing unit, which is arranged on the reaction vessel fixing rack (7) and is suitable for detecting the gravity of the reaction vessel on the reaction vessel fixing rack (7).

5. The water bath system according to any one of claims 1 to 4, characterized in that: The thermal circulation structure (2) further comprises a circulation drive unit (22) connected between the circulation jacket (8) and the water bath (1), and the liquid between the circulation jacket (8) and the water bath (1) and the liquid in the water bath (1) form a circulation liquid circuit through the circulation drive unit (22).

6. The water bath system according to claim 5, characterized in that: One end of the circulation drive unit (22) is connected to the circulation jacket (8), and the other end is connected to the water bath (1), so as to be able to transport the liquid between the circulation jacket (8) and the water bath (1) into the water bath (1), and to transport the liquid in the water bath (1) between the circulation jacket (8) and the water bath (1).

7. The water bath system according to claim 6, characterized in that: One end of the circulation drive unit (22) is connected to the upper part of the side wall of the circulation jacket (8), and the other end is connected to the lower part of the side wall of the water bath (1).

8. The water bath system according to any one of claims 1 to 4, characterized in that: It also comprises a transparent box (6) with an opening at the bottom, wherein the transparent box (6) is sleeved on the outside of the water bath (1) or arranged on the top of the water bath (1), and the transparent box (6) is provided with air holes.

9. The water bath system according to claim 8, characterized in that: The longitudinal section of the top of the transparent box (6) is ∧-shaped.

10. The water bath system according to any one of claims 2 to 4, characterized in that: The water bath (1) is also provided with a temperature sensing unit (5) for detecting the temperature of the liquid in the water bath (1), and the control unit is connected to the temperature sensing unit (5) to receive the temperature detected by the temperature sensing unit (5) and control the operation of the heating unit (21) according to the temperature.

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