CN219392531U - Temperature control device of temperature verification box - Google Patents
Temperature control device of temperature verification box Download PDFInfo
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- CN219392531U CN219392531U CN202320347620.7U CN202320347620U CN219392531U CN 219392531 U CN219392531 U CN 219392531U CN 202320347620 U CN202320347620 U CN 202320347620U CN 219392531 U CN219392531 U CN 219392531U
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Abstract
The utility model discloses a temperature control device of a temperature verification box, and belongs to the technical field of temperature verification boxes. The compressor, the oil separator, the condenser, the liquid reservoir and the filter are connected in sequence; the outlet of the filter is connected with the first inlet of the heat regenerator, the first outlet of the heat regenerator is connected with the inlet of the evaporator, the outlet of the evaporator is connected with the second inlet of the heat regenerator, and the second outlet of the heat regenerator is connected with the air suction port of the compressor; the first flow regulating valve is arranged on a pipeline between the first outlet of the heat regenerator and the inlet of the evaporator; the outlet of the oil separator is connected with the inlet of the evaporator through a pipeline; the second flow regulating valve is arranged on a pipeline between the outlet of the oil separator and the inlet of the evaporator. Two temperature regulating loops which independently operate can be formed, and the independent regulation and control of temperature rise and temperature reduction are realized, so that the temperature regulating and controlling range is enlarged. The two temperature regulation and control loops can run simultaneously, so that the temperature control precision is improved.
Description
Technical Field
The utility model relates to a device for regulating and controlling the temperature of a temperature verification box, and belongs to the technical field of temperature verification boxes.
Background
The temperature verification box is a device which realizes automatic adjustment of the temperature in the temperature verification box, temperature verification data processing and printing of the result through accurate measurement of a temperature sensor and control of an industrial programmable controller.
The temperature verification box needs to control the temperature in the box body in the use process. The following two schemes are currently commonly employed to regulate the temperature within a temperature verification chamber. According to the first scheme, the refrigeration electromagnetic valve and the hot side electromagnetic valve are alternately switched on and off, and different cold or heat is output through PID adjustment of duty ratio. And in the second scheme, different cold or heat is output by adjusting the cold of the power balance refrigerating system of the heater. The PID refers to "proportional (proportional), integral (integral), derivative (derivative)", which is a very common control algorithm.
The temperature in the temperature detection box is regulated by adopting the scheme I, and the following technical problems are existed: the temperature control precision is limited, and the maximum cooling capacity or the heat quantity is limited to meet the cooling-heating balance, and the temperature rising and falling speed is influenced at the maximum +/-0.1 ℃. The temperature in the temperature verification box is regulated by adopting the scheme II, and the following technical problems are existed: high power consumption, low energy efficiency ratio, small applicable temperature range and poor high-temperature and low-temperature control precision.
Disclosure of Invention
The utility model aims to solve the technical problems of low temperature control precision and small applicable temperature range of the existing temperature control device of a temperature verification box, and provides a temperature control device for the temperature verification box. The temperature control device for the temperature verification box has the advantages of wide applicable temperature range, high temperature control precision and high temperature rising and falling speed.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a temperature control device for a temperature verification case, comprising: the device comprises a compressor, an oil separator, a condenser, a liquid reservoir, a filter, a heat regenerator, a first flow regulating valve, an evaporator, an evaporation temperature sensor, an evaporation pressure sensor and an in-box temperature sensor;
the regenerator has a first inlet, a second inlet, a first outlet, and a second outlet;
the compressor, the oil separator, the condenser, the liquid reservoir and the filter are sequentially connected through pipelines; the outlet of the filter is connected with the first inlet of the heat regenerator through a pipeline, the first outlet of the heat regenerator is connected with the inlet of the evaporator through a pipeline, the outlet of the evaporator is connected with the second inlet of the heat regenerator through a pipeline, and the second outlet of the heat regenerator is connected with the air suction port of the compressor through a pipeline; the first flow regulating valve is arranged on a pipeline between the first outlet of the heat regenerator and the inlet of the evaporator;
the outlet of the oil separator is also connected with the inlet of the evaporator through a pipeline; the second flow regulating valve is arranged on a pipeline between the outlet of the oil separator and the inlet of the evaporator;
the evaporation temperature sensor and the evaporation pressure sensor are arranged at the inlet of the evaporator;
the temperature sensor in the box is arranged on the box body of the temperature verification box.
According to some embodiments of the disclosure, the first flow regulating valve may be an electronic expansion valve.
According to some embodiments of the disclosure, the second flow regulating valve may be an electronic expansion valve.
According to some embodiments of the present disclosure, the evaporation temperature sensor may be an NTC temperature sensor.
According to some embodiments of the present disclosure, the vapor pressure sensor may be a voltage signal pressure transmitter.
According to some embodiments of the disclosure, the in-box temperature sensor may be a PT100 temperature sensor.
According to some embodiments of the disclosure, the temperature control device of the temperature verification case further comprises a first fan; the first fan is arranged at the condenser.
According to some embodiments of the disclosure, the temperature control device of the temperature verification case further comprises a second fan; the second fan is arranged at the evaporator.
The beneficial effects of the utility model are as follows:
according to the temperature control device of the temperature verification box, the outlets of the oil separators are respectively connected with the inlet of the condenser and the inlet of the steam generator through different pipelines, so that two temperature control loops can be formed. The first flow regulating valve and the second flow regulating valve are opened and closed, so that two temperature regulating loops which independently operate can be formed, and the independent regulation and control of temperature rise and temperature reduction are realized, thereby expanding the temperature regulating range, and the temperature regulating range is-45 to 60 ℃ under the condition of no heater.
According to the temperature control device of the temperature verification box, the first flow regulating valve and the second flow regulating valve are used simultaneously and matched, so that the two temperature regulating loops operate simultaneously, and the temperature control precision is improved. By further adopting the electronic expansion valve, the temperature is regulated into a smooth process, stepless regulation can be realized, the output cold or heat and the heat dissipation capacity of the box body are balanced relatively, and the fluctuation degree of the temperature in the box body is +/-0.01 ℃.
The temperature control device of the temperature verification box provided by the utility model has the advantages that the temperature rising and falling speed is high, the opening of the electronic expansion valve can be adjusted according to the current working condition, so that the system performance is enabled to be optimal, and the overall speed is improved by 10% -50% compared with that of the traditional mode (capillary or thermal expansion valve);
the temperature control device of the temperature verification box provided by the utility model has the advantages that the energy efficiency ratio is high, the power consumption is low, the heater is reduced in comparison with the mode of balancing the heater and the refrigerating capacity, the heat productivity of the compressor is used as a heat source, and the power consumption can be saved by 50% at most.
Drawings
Fig. 1 is a schematic structural diagram of a temperature control device of a temperature verification box according to an embodiment of the present utility model;
FIG. 2 is a schematic structural diagram of a temperature control device of a temperature verification box according to an embodiment of the present utility model;
FIG. 3 is a schematic structural diagram of a temperature control device of a temperature verification box according to an embodiment of the present utility model;
the system comprises a compressor 1, an oil separator 2, a condenser 3, a liquid storage device 4, a filter 5, a heat regenerator 6, a first flow regulating valve 7, an evaporator 8, a second flow regulating valve 9, a first fan 10, a second fan 12, an evaporation temperature sensor 13, an evaporation pressure sensor 14, an in-box temperature sensor 15 and a box 16.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and therefore should not be construed as limiting the utility model, but rather as limiting the scope of the utility model, so that any structural modifications, proportional changes, or dimensional adjustments should fall within the scope of the utility model without affecting the efficacy or achievement thereof. Also, the terms such as "upper", "lower", "rear", "front", "left", "right", "middle" and "a" and the like referred to in this specification are also for descriptive purposes only and are not intended to limit the scope of the utility model in which the utility model may be practiced, but rather the relative relationship of the terms may be altered or modified without materially altering the skill of the art.
A temperature control device for a temperature verification case, comprising: a compressor 1, an oil separator 2, a condenser 3, a liquid reservoir 4, a filter 5, a regenerator 6, a first flow regulating valve 7, an evaporator 8, an evaporation temperature sensor 13, an evaporation pressure sensor 14 and an in-tank temperature sensor 15; regenerator 6 has a first inlet, a second inlet, a first outlet, and a second outlet;
the compressor 1, the oil separator 2, the condenser 3, the liquid reservoir 4 and the filter 5 are sequentially connected through pipelines; the outlet of the filter 5 is connected with the first inlet of the heat regenerator 6 through a pipeline, the first outlet of the heat regenerator 6 is connected with the inlet of the evaporator 8 through a pipeline, the outlet of the evaporator 8 is connected with the second inlet of the heat regenerator 6 through a pipeline, and the second outlet of the heat regenerator 6 is connected with the air suction port of the compressor 1 through a pipeline; the first flow regulating valve 7 is arranged on a pipeline between the first outlet of the heat regenerator 6 and the inlet of the evaporator 8;
the outlet of the oil separator 2 is also connected with the inlet of the evaporator 8 through a pipeline; the second flow regulating valve 9 is arranged on a pipeline between the outlet of the oil separator 2 and the inlet of the evaporator 8;
an evaporation temperature sensor 13 and an evaporation pressure sensor 14 are arranged at the outlet of the evaporator 8; the in-tank temperature sensor 15 is disposed in a tank body 16 of the temperature verification tank.
Specifically, as shown in fig. 1, a temperature control device of a temperature verification box includes a compressor 1, an oil separator 2, a condenser 3, a liquid reservoir 4, a filter 5, a regenerator 6, a first flow regulating valve 7, and an evaporator 8, which are sequentially connected through pipelines; wherein, the first inlet and the first outlet of the heat regenerator 6 are respectively connected with the outlet of the filter 5 and the inlet of the first flow regulating valve 7, the inlet of the evaporator 8 is connected with the outlet of the first flow regulating valve 7, and the outlet of the evaporator 8 is connected with the second inlet of the heat regenerator 6; the second outlet of the heat regenerator 6 is connected with the air suction port of the compressor 1; the inlet of the second flow rate regulating valve 9 is connected to a line between the oil separator 2 and the condenser 3 (the inlet of the second flow rate regulating valve 9 is connected to the inlet of the condenser 3), and the outlet of the second flow rate regulating valve 9 is connected to a line between the evaporator 8 and the first flow rate regulating valve 7.
The outlet of the oil separator 2 is connected with the inlet of the condenser 3 and the inlet of the steam generator through different pipelines respectively, so that two regulating and controlling loops can be formed. The compressor 1, the oil separator 2, the condenser 3, the liquid reservoir 4, the filter 5, the heat regenerator 6, the evaporator 8, the heat regenerator 6 and the compressor 1 are sequentially connected through pipelines, and a first regulation and control loop can be formed by matching with the first flow regulating valve 7. The compressor 1, the oil separator 2, the evaporator 8, the heat regenerator 6 and the compressor 1 are sequentially connected through pipelines, and a second regulation loop can be formed by matching with a second flow regulating valve 9.
The compressor 1 is a driven fluid machine that lifts low-pressure gas into high-pressure gas, and is a heart of a refrigeration system. The low-temperature low-pressure refrigerant gas is sucked from the air suction pipe, the motor is operated to drive the piston to compress the low-temperature low-pressure refrigerant gas, and then the high-temperature high-pressure refrigerant gas is discharged to the air discharge pipe to provide power for refrigeration cycle. The compressor 1 may be any existing compressor 1.
The condenser 3 cools the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 into a refrigerant liquid by using air or water as a cold source, and transfers heat in the pipe to the air in the vicinity of the pipe in a rapid manner. The condenser 3 may be any existing condenser 3.
The oil separator 2 may be any existing oil separator 2; the reservoir 4 can be any reservoir 4 existing in the prior art; the filter 5 can be any existing filter 5; the heat regenerator 6 can adopt any existing heat regenerator 6; the evaporator 8 may be any existing evaporator 8.
The first flow rate adjustment valve 7 may be any valve that can realize flow rate adjustment. Specifically, a solenoid valve, an electronic expansion valve, or the like may be used. As a specific embodiment of the temperature control device of the temperature verification box, the first flow rate adjusting valve 7 may be an electronic expansion valve.
The second flow rate adjusting valve 9 may be any valve that can realize flow rate adjustment. Specifically, a solenoid valve, an electronic expansion valve, or the like may be used. As a specific embodiment of the temperature control device of the temperature verification box, the second flow rate adjusting valve 9 may be an electronic expansion valve.
The evaporation temperature sensor 13 may be any one of existing ones. As a specific embodiment of the temperature control device of the temperature verification box, the evaporation temperature sensor 13 thereof may be an NTC temperature sensor.
The evaporating pressure sensor 14 may be any pressure sensor available. As a specific embodiment of the temperature control device of the temperature verification box, the evaporating pressure sensor 14 thereof may be a voltage signal pressure transmitter.
The in-tank temperature sensor 15 may be any one of the existing ones. As a specific embodiment of the temperature control device of the temperature verification box, the in-box temperature sensor 15 may be a PT100 temperature sensor.
One embodiment of the temperature control device as a temperature verification box may further include a first fan 10; the first fan 10 is disposed at the condenser 3. Specifically, as shown in fig. 2, the first fan 10 may be disposed at a side of the condenser.
One embodiment of the temperature control device as a temperature verification box may further include a second fan 12; the second fan 12 is disposed at the evaporator 8. Specifically, as shown in fig. 3, the second fan 12 may be disposed below the evaporator 8.
When the temperature of the evaporator 8 needs to be rapidly reduced, the second flow regulating valve 9 is closed, and the first regulating circuit operates: the gas (the gas temperature is 80-90 ℃) discharged from the compressor 1 enters the oil separator 2 for oil-gas separation, then enters the condenser 3 for cooling into a gas-liquid mixture, the cooled gas-liquid mixture sequentially passes through the liquid storage device 4 and the filter 5 for gas-liquid separation and impurity filtration, the purified liquid enters the heat regenerator 6 for cold-heat exchange between the normal-temperature liquid refrigerant and the low-temperature gaseous refrigerant, the liquid treated by the heat regenerator 6 is throttled and depressurized by the first flow regulating valve 7 and then enters the evaporator 8, and the liquid refrigerant evaporates and absorbs heat in the evaporator 8, so that the temperature of the evaporator 8 is reduced. The evaporation temperature sensor 13 and the evaporation pressure sensor 14 detect temperature and pressure values, and after the superheat is calculated, the opening degree required for the first flow rate adjustment valve 7 is calculated by PID until the evaporator 8 is lowered to the required temperature.
When the temperature of the evaporator 8 needs to be quickly increased, the first flow regulating valve 7 is closed, the opening of the second flow regulating valve 9 is regulated to the maximum, and the second regulating circuit operates: the high-temperature and high-pressure gas discharged from the compressor 1 enters the oil separator 2 for oil-gas separation, is throttled by the second flow regulating valve 9 and then directly enters the evaporator 8, so that the temperature of the evaporator 8 is increased.
When the temperature of the evaporator 8 needs to be precisely controlled, the first regulation loop and the second regulation loop operate simultaneously. At this time, the low-temperature liquid throttled by the first flow rate adjusting valve 7 and the high-temperature gas throttled by the second flow rate adjusting valve 9 are mixed together to reach a desired temperature and then enter the evaporator 8. The first flow regulating valve 7 is regulated to the opening corresponding to the evaporation temperature, and the opening required by the second flow regulating valve 9 is calculated through PID, so that the accurate temperature control is realized; when the opening degree of the second flow rate regulating valve 9 cannot meet the current evaporating temperature, the second flow rate regulating valve 9 is at a proper opening degree by adjusting the opening degree of the first flow rate regulating valve 7.
The temperature control device of the temperature verification box takes R404A refrigerant (boiling point is-46.22 ℃ under the pressure of 0 bar) as a reference, the second flow rate is regulated and closed, the opening of the first flow rate regulating valve 7 is regulated to the corresponding opening of the current working condition, gas discharged from the compressor 1 enters the oil separator 2 for oil-gas separation, then enters the condenser 3 for cooling, the gas is cooled into a gas-liquid mixture, then sequentially passes through the liquid storage device 4 and the filter 5 for gas-liquid separation and impurity filtration, the purified liquid enters the heat regenerator 6 for heat exchange with low-temperature gas returned from the evaporator 8, the liquid subjected to heat exchange by the heat regenerator 6 enters the evaporator 8 after being throttled by the first flow rate regulating valve 7, the evaporator 8 is cooled, and the forced ventilation of the second fan 12 is carried out by the evaporator 8 to ensure that the heat exchange between the air in the box and the evaporator is completed, so that the temperature in the box is rapidly reduced. The temperature of the refrigerant can be reduced to-46 ℃ at the lowest, and the temperature in the tank can be up to-45 ℃; the exhaust temperature of the compressor 1 is 80-90 ℃, the opening of the first flow regulating valve 7 is regulated to the minimum, the opening of the second flow regulating valve 9 is regulated to the maximum, the high-temperature and high-pressure gas discharged from the compressor 1 enters the oil separator 2 for oil-gas separation, and directly enters the evaporator 8 after being throttled by the second flow regulating valve, so that the temperature of the evaporator 8 is increased, the evaporator 8 completes heat exchange between the air in the tank and the evaporator through forced ventilation of the second fan 12, and the temperature in the tank is rapidly increased. The refrigerant temperature may be raised to 65 c and the in-tank temperature 60 c. Namely, the temperature range in the box is-45-60 ℃;
while the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.
Claims (8)
1. Temperature regulating device of temperature verification case, its characterized in that includes: the device comprises a compressor, an oil separator, a condenser, a liquid reservoir, a filter, a heat regenerator, a first flow regulating valve, an evaporator, an evaporation temperature sensor, an evaporation pressure sensor and an in-box temperature sensor;
the regenerator has a first inlet, a second inlet, a first outlet, and a second outlet;
the compressor, the oil separator, the condenser, the liquid reservoir and the filter are sequentially connected through pipelines; the outlet of the filter is connected with the first inlet of the heat regenerator through a pipeline, the first outlet of the heat regenerator is connected with the inlet of the evaporator through a pipeline, the outlet of the evaporator is connected with the second inlet of the heat regenerator through a pipeline, and the second outlet of the heat regenerator is connected with the air suction port of the compressor through a pipeline; the first flow regulating valve is arranged on a pipeline between the first outlet of the heat regenerator and the inlet of the evaporator;
the outlet of the oil separator is also connected with the inlet of the evaporator through a pipeline; the second flow regulating valve is arranged on a pipeline between the outlet of the oil separator and the inlet of the evaporator;
the evaporation temperature sensor and the evaporation pressure sensor are arranged at the inlet of the evaporator;
the temperature sensor in the box is arranged on the box body of the temperature verification box.
2. The temperature control device of a temperature verification box according to claim 1, wherein the first flow regulating valve is an electronic expansion valve.
3. A temperature control device of a temperature verification chamber according to claim 1 or 2, wherein the second flow regulating valve is an electronic expansion valve.
4. A temperature control device for a temperature verification chamber according to claim 3, wherein the evaporation temperature sensor is an NTC temperature sensor.
5. The temperature control device of a temperature verification box of claim 4, wherein the vapor pressure sensor is a voltage signal pressure transmitter.
6. The temperature control device of a temperature verification box according to claim 5, wherein the in-box temperature sensor is a PT100 temperature sensor.
7. The temperature control device of the temperature verification box of claim 6, further comprising a first fan; the first fan is arranged at the condenser.
8. The temperature control device of the temperature verification box of claim 7, further comprising a second fan; the second fan is arranged at the evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347620.7U CN219392531U (en) | 2023-03-01 | 2023-03-01 | Temperature control device of temperature verification box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347620.7U CN219392531U (en) | 2023-03-01 | 2023-03-01 | Temperature control device of temperature verification box |
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| Publication Number | Publication Date |
|---|---|
| CN219392531U true CN219392531U (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320347620.7U Active CN219392531U (en) | 2023-03-01 | 2023-03-01 | Temperature control device of temperature verification box |
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| CN (1) | CN219392531U (en) |
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- 2023-03-01 CN CN202320347620.7U patent/CN219392531U/en active Active
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