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CN-117299252-B - Ultra-high precision constant temperature tank

CN117299252BCN 117299252 BCN117299252 BCN 117299252BCN-117299252-B

Abstract

The invention relates to an ultra-high precision constant temperature tank which comprises a tank body, a control system and a refrigerating system, wherein the tank body is arranged on one side of the interior of the tank body, a stirring device is arranged on one side of the interior of the tank body, a heating plate is arranged on the outer side of the tank body, the refrigerating system is arranged on the other side of the interior of the tank body, the control system is arranged at the top of the refrigerating system and controls components in the refrigerating system to start and stop running, an evaporator is arranged in the refrigerating system, and the evaporator is arranged on the outer side of the heating plate. The ultra-high precision constant temperature tank provided by the invention realizes high-precision temperature control by precisely controlling the evaporation amount through adopting a precisely controlled hot gas bypass loop, a precisely heat-transferring condenser and a precisely heat-transferring evaporator.

Inventors

  • JIA QINGCHEN
  • LI FANGKUI

Assignees

  • 合肥智测电子有限公司

Dates

Publication Date
20260508
Application Date
20231120

Claims (6)

  1. 1. The ultra-high precision constant temperature tank is characterized by comprising a tank body (1), a tank body (2), a control system (3) and a refrigerating system (4), wherein the tank body (2) is arranged on one side of the inside of the tank body (1), a stirring device (21) is arranged on one side of the inside of the tank body (2), a heating plate (5) is arranged on the outside of the tank body (2), the refrigerating system (4) is arranged on the other side of the inside of the tank body (1), the control system (3) is arranged at the top of the refrigerating system (4) and controls components in the refrigerating system (4) to start and stop, an evaporator (42) is arranged in the refrigerating system (4), and the evaporator (42) is arranged on the outer side of the heating plate (5); The refrigerating system (4) comprises a compressor (40), an expansion valve (41), an evaporator (42), a drying bottle (43), a condenser (44), a heat regenerator (45), a needle valve (47), a first cold quantity adjusting knob (491) and a second cold quantity adjusting knob (492), wherein the compressor (40) is arranged at the bottom of an inner cavity of the box body (1), the compressor (40) is connected with the heat regenerator (45), the top of the drying bottle (43) is connected with the expansion valve (41), one side of a liquid outlet end of the expansion valve (41) is connected with a pressure gauge (48) through a capillary tube, the other side of the liquid outlet end of the expansion valve (41) is connected with the evaporator (42) through a first needle valve (471), the side hot end of the heat regenerator (45) is directly connected with the condenser (44), and the control end of the heat regenerator (45) is directly connected with the second cold quantity adjusting knob (492) through a second needle valve (472); The expansion valve (41) is provided with a pipeline connected in parallel with the expansion valve, a loop formed by the pipeline is a first hot gas bypass loop (404), the front end of the pipeline is connected with the drying bottle (43), the tail end of the pipeline is connected with an outlet pipeline of the expansion valve (41), a first electromagnetic valve (401) and a first needle valve (471) are arranged in the middle of the pipeline, and the outer side of the first needle valve (471) is connected with a first cold quantity adjusting knob (491); The second needle valve (472) and the second electromagnetic valve (402) form a second hot gas bypass loop (405), an inlet of the second hot gas bypass loop (405) is connected with a middle cold end of the heat regenerator (45), an outlet of the second hot gas bypass loop is connected with an air inlet of the compressor (40), the middle of the pipeline is connected with the second electromagnetic valve (402) in parallel, and the outer side of the second needle valve (472) is connected with a second cold quantity adjusting knob (492); the bottom of the tank body (2) is provided with a heat-insulating foaming plate (26), and the heating plates (5) are arranged on two side surfaces of the tank body (2) and are overlapped on one surface of the evaporator (42).
  2. 2. The ultra-high precision thermostat of claim 1, wherein the pressure gauge (48) is connected to the outside of the expansion valve (41), and the pressure gauge (48) is installed on the outside of the case (1) side by side with the first cooling capacity adjusting knob (491) and the second cooling capacity adjusting knob (492).
  3. 3. An ultra-high precision thermostatic bath according to claim 1, wherein a fan (46) is mounted on the inner side of the condenser (44), and both the condenser (44) and the fan (46) are mounted on the bottom of the inner cavity of the case (1).
  4. 4. The ultra-high precision constant temperature bath according to claim 1, wherein a heat radiation net (11) is arranged on one side of the box body (1) close to the condenser (44), and the bottom of the drying bottle (43) is connected with the outlet of the condenser (44) through a liquid viewing mirror (403).
  5. 5. The ultra-high precision constant temperature tank as claimed in claim 1, wherein the stirring device (21) comprises a motor (22) and a stirring paddle (25), the motor (22) is arranged at the top of the tank body (1), the driving end of the motor (22) extends into the tank body (1) and extends into the tank body (2) to be in transmission connection with the stirring paddle (25), the periphery of the stirring paddle (25) is provided with a filter cover (23), and a cooling fan (24) is arranged on the outer side of the motor (22).
  6. 6. The ultra-high precision thermostat bath as claimed in claim 1, wherein the evaporator (42) and the condenser (44) are of two-in-one-out pipeline structures.

Description

Ultra-high precision constant temperature tank Technical Field The invention relates to the technical field of refrigeration, in particular to an ultra-high-precision constant temperature tank. Background The constant temperature tank is especially suitable for chemical, biological and physical laboratories which need to maintain working at low temperature and normal temperature, and is a necessary device in the laboratory. The constant temperature tank can be combined with a rotary evaporator, a vacuum freeze drying box, a circulating water type vacuum pump, a magnetic stirrer and other instruments to perform multifunctional chemical reaction operation and medicine storage. The thermostatic bath requires precise temperature control of the temperature of the liquid in the bath, with a temperature control accuracy of 0.1 ℃ or even 0.01 ℃ being currently achievable. However, precise temperature control with high accuracy is difficult to realize at present, which causes a certain obstruction to scientific research development, and an ultra-high-accuracy constant temperature tank is proposed based on further precise temperature control. Disclosure of Invention The invention aims to provide an ultra-high precision constant temperature tank so as to solve the problems in the prior art. In order to achieve the above purpose, the technical scheme of the invention is as follows: The ultra-high precision constant temperature tank comprises a tank body, a control system and a refrigerating system, wherein the tank body is arranged on one side of the inside of the tank body, a stirring device is arranged on one side of the inside of the tank body, a heating plate is arranged on the outside of the tank body, the refrigerating system is arranged on the other side of the inside of the tank body, the control system is arranged at the top of the refrigerating system and controls components in the refrigerating system to start and stop running, an evaporator is arranged in the refrigerating system, and the evaporator is arranged on the outer side of the heating plate. In the scheme, the refrigerating system comprises a compressor, an expansion valve, an evaporator, a drying bottle, a condenser, a heat regenerator, a needle valve, a first cold quantity adjusting knob and a second cold quantity adjusting knob, wherein the compressor is arranged at the bottom of an inner cavity of the box body and connected with the heat regenerator, the top of the drying bottle is connected with the expansion valve, one side of a liquid outlet end of the expansion valve is connected with the evaporator through a pressure gauge, the other side of the liquid outlet end of the expansion valve is connected with the first cold quantity adjusting knob through the first needle valve, the hot end of the side face of the heat regenerator is directly connected with the condenser, the control end of the heat regenerator is connected with the second cold quantity adjusting knob through the second needle valve, and the cold end of the middle part of the heat regenerator is directly connected with the evaporator. In the above scheme, the outside of expansion valve still is connected with the manometer, manometer and first cold volume adjust knob, second cold volume adjust knob install in the outside of box side by side. The expansion valve is provided with a pipeline connected in parallel with the expansion valve, a loop formed by the pipeline is a first hot gas bypass loop, the front end of the pipeline is connected with the drying bottle, the tail end of the pipeline is connected with an outlet pipeline of the expansion valve, a first electromagnetic valve and a first needle valve are arranged in the middle of the pipeline, and the outer side of the first needle valve is connected with a first cold quantity adjusting knob. In addition, as a preferable scheme, the second needle valve and the second electromagnetic valve form a second hot gas bypass loop, an inlet of the second hot gas bypass loop is connected with a middle cold end of the heat regenerator, an outlet of the second hot gas bypass loop is connected with an air inlet of the compressor, the middle of the pipeline is formed by connecting the second needle valve with the second electromagnetic valve in parallel, and the outer side of the second needle valve is connected with a second cold quantity adjusting knob. In the scheme, the fan is arranged on the inner side of the condenser, and the condenser and the fan are arranged at the bottom of the inner cavity of the box body. In the scheme, the stirring device comprises a motor and a stirring paddle, the motor is arranged at the top of the box body, the driving end of the motor extends into the box body and extends into the groove body to be in transmission connection with the stirring paddle, the periphery of the stirring paddle is provided with a filter cover, and the outer side of the motor is provided with a heat dissipation fan. In addition,