CN112895367A

CN112895367A - Strip-shaped energy-saving temperature control method

Info

Publication number: CN112895367A
Application number: CN201911223825.9A
Authority: CN
Inventors: 郭纪周
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2021-06-04

Abstract

The invention discloses a strip energy-saving temperature control method which is mainly applied to equipment and scenes needing forced heating or cooling after the equipment exceeds a target temperature, two temperature controllers are used for respectively controlling the highest temperature and the lowest temperature, a strip buffer strip is formed between the highest temperature and the lowest temperature, and unnecessary energy waste caused by repeated heating and forced cooling in the traditional temperature control mode is reduced or eliminated, so that the aims of saving energy, reducing consumption and reducing production cost are fulfilled.

Description

Strip-shaped energy-saving temperature control method

One, the technical field

The invention relates to a new temperature control method, which is particularly suitable for equipment or places which are forcibly cooled by cooling water, compressed air, a fan and the like if the temperature is passively increased after the temperature is heated to a set value, and equipment or places which are cooled by refrigeration.

Second, technical background

The existing temperature control mode generally stops heating or refrigerating after the temperature reaches a set value of a temperature controller, but when some equipment runs, a working object can generate extra heat, such as a mold temperature controller, the temperature of a mold rises due to the injection of high-temperature raw materials during the production of the mold, and in order to ensure the stable quality of a product, the temperature of the mold is forcibly reduced by using cooling water after the temperature of the mold exceeds the set value; the screw of the extruder rotates to shear the raw material, thereby raising the temperature of the barrel, and in order to prevent the raw material from being pyrolyzed, the temperature is forcibly lowered by using a fan after exceeding a set temperature.

Most of the existing temperature control methods (such as a mold temperature machine) require 80 +/-2 ℃ of production process, a temperature controller sets a target value of 80 ℃ to form a control boundary, because the working output mode of the temperature controller is mostly a selective switch, when the temperature measured by the temperature controller reaches or exceeds (not less than 80 ℃), the temperature controller starts to replace cooling water to forcibly cool, because the target temperature value is a point (meanwhile, a heater has heating inertia, and a temperature sensor has induction delay), just like a seesaw, in order to keep the temperature stable, the reciprocating cycle of continuous heating → over-temperature → forced cooling → too low-temperature → reheating is continuously carried out, so that a large amount of energy is wasted, the production cost is increased, and the energy conservation and consumption reduction are not facilitated.

Third, the invention

In order to solve the energy waste caused by the existing temperature control mode, the invention discloses a novel strip-shaped temperature control method, which comprises at least three implementation schemes.

1. The two temperature controllers are used, the first temperature controller is used for controlling the lowest temperature and is responsible for temperature rise, the second temperature controller is used for controlling the highest temperature and is responsible for temperature reduction, and the target temperature values of the two temperature controllers can be respectively set according to the requirements of the production process. When the temperature is lower than the set value of the first temperature controller, the first temperature controller starts heating until the temperature reaches the set value of the first temperature controller, and then the heating is stopped; if the temperature is higher than the set value of the second temperature controller, the second temperature controller starts to cool down, the temperature is stopped to cool down until the temperature is reduced to the set value of the second temperature controller, the temperature is controlled in the band-shaped range between the highest value and the lowest value, the two temperature controllers do not output actions in the range, the temperature is not increased or reduced, the temperature is prevented from being increased or reduced by using one temperature controller at present, the temperature is repeatedly switched between the temperature increase and the temperature reduction, the heat loss and the energy waste are caused, and therefore the purposes of saving energy and reducing consumption are achieved.

2. In an integrated circuit, a PLC, a human-computer interface or a temperature controller, a highest temperature value and a lowest temperature value are set according to a production process and energy-saving and consumption-reducing requirements, when the temperature is lower than the lowest temperature value, the temperature starts to rise, when the temperature is higher than the highest temperature value, the temperature starts to fall, and when the temperature is in a band-shaped range between the highest temperature value and the lowest temperature value, the temperature does not rise or fall, so that the purposes of saving energy and reducing consumption are achieved.

3. In an integrated circuit, a PLC, a human-computer interface or a temperature controller, according to the production process and energy-saving requirements, a belt-shaped temperature band is formed by presetting or setting, taking a target temperature value as a center and a plurality of degrees lower or higher than the target temperature value as ranges, the target temperature value and the range of positive and negative temperature difference can be set at will, if the preset and set temperature range is from +1 degree to-2 degrees, the target temperature value is 80 ℃, when the temperature is higher than 81 ℃, the temperature starts to be reduced, when the temperature is lower than 78 ℃, the temperature starts to be increased, and when the belt-shaped range is in the middle of 78-81 ℃, the temperature is not increased or reduced, so that the purposes of saving.

The invention has five effects according to different working conditions:

1. work object (like mould etc.), the temperature that the during operation produced is less than the minimum temperature value that the temperature controller set up, then after working a period, equipment temperature can be less than the minimum temperature value of settlement, and the temperature controller begins to heat up this moment, until reaching minimum temperature value, works a period again, and equipment temperature is less than the minimum temperature value of settlement again, and the temperature controller begins to heat up again, so circulation work because of need not to force the cooling, has avoided the calorific loss that forces the cooling to cause to play energy saving and consumption reduction's effect.

2. The work object (such as mould, etc.), the temperature that the during operation produced is higher than the maximum temperature value that the temperature controller set up, then after working a period of time, after the temperature surpassed the maximum temperature value that the temperature controller set up, begin to force the cooling (with cooling water, etc.), stop the cooling when dropping to the maximum temperature value that the temperature controller set up, after working a period again, after the equipment temperature is higher than the maximum temperature value that the temperature controller set up again, begin again and force the cooling, the work of so circulation, because need not to heat, the energy that the heating needs has been saved, thereby reach energy saving and consumption reduction's purpose

3. When the temperature of a working object (such as a die) is just between the lowest temperature value and the highest temperature value, neither heating nor cooling is needed, and energy for heating is not consumed at all.

4. The energy is saved because unnecessary temperature rise and forced temperature reduction are reduced or avoided, and the temperature rise of a cooling water system caused by the emission of hot water is avoided for equipment using cooling water for temperature reduction, so that the energy consumption of the cooling water constant temperature system is reduced, and the efficiency of other equipment using cooling water for work is improved.

5. For equipment (such as an extruder and the like) using a fan for forced cooling, the temperature of a workplace can be obviously reduced, the comfort level of workers is improved, and the power consumption of an air conditioner of the workplace is reduced due to the reduction or avoidance of forced heat dissipation of the fan while the heating energy consumption is saved.

Claims

1. The invention relates to a strip temperature control method, which controls the temperature in a strip range from the lowest value to the highest value, and only when the temperature exceeds the range, the temperature is increased or reduced.

2. The invention forms a buffer zone between the highest temperature value and the lowest temperature value, thereby avoiding energy waste caused by repeated temperature rise and temperature reduction, and achieving the purposes of energy conservation and consumption reduction.

3. The temperature controllers used for controlling the highest temperature and the lowest temperature can be respectively arranged in two independent bodies, or can be a single temperature controller capable of achieving the same function, or an integrated circuit board, a microcomputer, a PLC, a human-computer interface and the like which are programmed in the temperature controllers.

4. The lowest temperature value and the highest temperature value of the temperature controller and the difference of the two temperature values can be set according to the requirements of the production process and can also be set in combination with the requirements of energy conservation and consumption reduction.

5. The invention is suitable for equipment and places which need forced cooling after overtemperature or forced heating after low temperature, including but not limited to equipment or scenes for heating and heating such as a mold temperature machine and an extruder listed in the specification, and can also be used for equipment and scenes for cooling and refrigerating such as an air conditioner and a water freezing machine.

6. The temperature controller, the integrated circuit board, the microcomputer, the PLC, the human-computer interface and the like can be preset or can be set, heating or cooling actions can be carried out only when the temperature is lower than or higher than a target temperature value by a plurality of degrees, and a strip-shaped temperature control band which takes the target temperature value as the center and takes the temperature higher than or lower than the target temperature value as the upper and lower amplitudes can be formed only by setting one target temperature value.

7. A thermostat having the same or similar functionality of the present invention, produced directly or indirectly based on the principles and methods of the present invention.