CN112857022A - Heating assembly device for improving air outlet temperature of heat pump drying unit and control method thereof - Google Patents
Heating assembly device for improving air outlet temperature of heat pump drying unit and control method thereof Download PDFInfo
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- CN112857022A CN112857022A CN202110330598.0A CN202110330598A CN112857022A CN 112857022 A CN112857022 A CN 112857022A CN 202110330598 A CN202110330598 A CN 202110330598A CN 112857022 A CN112857022 A CN 112857022A
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- 238000001035 drying Methods 0.000 title claims abstract description 81
- 238000010438 heat treatment Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000010977 unit operation Methods 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 8
- 238000005485 electric heating Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the technical field of heat pump drying, in particular to a heating assembly device for improving the air outlet temperature of a heat pump drying unit and a control method thereof; after the unit is started to operate, the unit judges and drives the control unit (1) to control the heating switch unit (A) to be turned on and off according to the operation mode and the air outlet temperature of the drying unit detected by the temperature sensing unit (B), so that the aim of automatically adjusting the air outlet temperature of the drying unit is fulfilled, the requirement of automatically drying materials with the drying temperature higher than 75 ℃ can be met, and the effects of energy conservation and emission reduction can be achieved. The heating unit is controlled to be opened and closed by combining the unit operation mode and the control unit through data fed back by each temperature sensing unit of the drying unit, so that the air outlet temperature of the drying unit is automatically adjusted, the drying temperature higher than 75 ℃ required by the drying material can be guaranteed to be reached when drying is carried out, the environment pollution caused by emission materials can be guaranteed, and the energy-saving and environment-friendly effects are achieved.
Description
Technical Field
The invention relates to the technical field of heat pump drying, in particular to a heating assembly device for improving the air outlet temperature of a heat pump drying unit and a control method thereof.
Background
As is well known, in the process of heating and drying, a heat pump drying unit is influenced by the operation principle and the characteristics of a refrigerant, and the outlet air temperature of the unit can only reach 75 ℃ at most; in daily use, when the drying material needs higher temperature, the heat pump drying unit can not meet the high temperature drying requirement of the user at all.
In order to solve the problem, generally, when the material needs to be dried at a temperature higher than 75 ℃, a coal drying or boiler drying mode is selected to meet the high-temperature drying requirement of a user; however, this solution has the following drawbacks: when coal is used for drying, the generated emissions can pollute the environment, coal is required to be continuously added into the drying furnace manually to meet the requirement of continuous combustion of the drying furnace, and when the coal is used for drying, the energy consumption is high, and the coal-fired drying furnace is not in accordance with the idea of energy conservation and emission reduction advocated by the state.
Disclosure of Invention
The invention aims to solve the technical problem and provides a heating assembly device for improving the air outlet temperature of a heat pump drying unit and a control method thereof aiming at the technical defects, wherein after the unit is started to operate, the unit judges and drives a control unit (1) to control a heating switch unit (A) to be switched on and switched off according to an operation mode and the air outlet temperature of the drying unit detected by a temperature sensing unit (B), so that the aim of automatically adjusting the air outlet temperature of the drying unit is fulfilled, materials with the drying temperature higher than 75 ℃ can be automatically dried, and the effects of energy conservation and emission reduction can be achieved. The heating unit is controlled to be opened and closed by combining the unit operation mode and the control unit through data fed back by each temperature sensing unit of the drying unit, so that the air outlet temperature of the drying unit is automatically adjusted, the drying temperature higher than 75 ℃ required by the drying material can be guaranteed to be reached when drying is carried out, the environment pollution caused by emission materials can be guaranteed, and the energy-saving and environment-friendly effects are achieved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the temperature sensing unit (B) is used for detecting the air outlet temperature of the dryer, the heating assembly is used for heating air at an air outlet of the dryer, the heating switch unit A, the metal frame C, the heating pipe D and the fixing nut E form the heating assembly, the temperature sensing unit and the heating switch unit are respectively electrically connected with the control unit, in addition, in order to facilitate understanding, a power supply L and a power supply N are further schematically drawn in the drawing, the temperature sensing unit B is used for connecting the heating switch unit A and the heating switch unit B, the heating switch unit A, the metal frame C, the heating pipe D and the fixing nut E form the heating assembly, and a complete system is formed. In addition, other components of the unit are indicated by arrows and numerals in the drawing, and the names of the components represented by each numeral are added with letters below the system drawing, and in the drawing, solid arrows indicate the flow direction of refrigerant, dashed arrows indicate the flow direction of air, and two-dot chain lines indicate electrical connection.
Further optimize this technical scheme, the unit is according to the drying-machine set air-out temperature that operation mode and temperature sensing unit (B) detected, judges and drive the control unit control heating unit and open and close, reaches the purpose of automatically regulated heat pump drying-machine set air-out temperature.
The technical scheme is further optimized, if the delta T-specified value is larger than or equal to 0 and the delta T-specified value is larger than or equal to 0 for 10 seconds continuously, the heating switch unit A is turned on to heat the air at the outlet of the drying unit by the heating unit so as to improve the air outlet temperature of the unit, and if the delta T-specified value is smaller than 0 or the delta T-specified value is larger than or equal to 0 and less than 10 seconds, the heating switch unit A is turned off, the heating unit stops heating the air at the outlet of the drying unit, and therefore the purpose of adjusting the air outlet temperature of the drying unit is achieved.
Further optimize this technical scheme, delta T is the difference of the actual temperature that drying unit set for the air-out temperature and drying unit air-out temperature sensor sensing under the stoving mode.
Further optimizing the technical scheme, wherein the specified value is the maximum deviation of the indoor dry bulb temperature specified in the national standard corresponding to the unit.
Compared with the prior art, the invention has the following advantages: as the traditional method adopts the mode of coal drying or boiler drying when the drying temperature of the materials is more than 75 ℃, the high-temperature drying requirement of users is met; however, this solution has the following drawbacks: when coal is used for drying, the generated emissions can pollute the environment, coal is required to be continuously added into the drying furnace manually to meet the requirement of continuous combustion of the drying furnace, and when the coal is used for drying, the energy consumption is high, and the coal-fired drying furnace is not in accordance with the idea of energy conservation and emission reduction advocated by the state. . In sum, the invention has the advantages of meeting the drying requirement of materials with the required drying temperature of over 75 ℃ and ensuring energy conservation and environmental protection in the drying process.
Drawings
Fig. 1 is a schematic diagram of a heating assembly device for increasing the outlet air temperature of a heat pump dryer.
In the figure: 1. the heat pump drying unit comprises a control unit 2, a heat pump drying unit 3, a compressor exhaust port 4, a compressor 5, a compressor air suction port 6, a dryer air outlet 7, a heating unit 8, a dryer circulating fan 9, an evaporation heat exchanger 10, an air exchanger 11, a dryer return air inlet 12, an air duct 13, a drying room 14, a drying room air inlet 15, a drying room air outlet 16, a condensation heat exchanger 17, a heat exchange tank 18, an electronic expansion valve 19, a drying room flow fan A, a heating switch unit B, a temperature sensing unit C, a metal frame D, a heating pipe E and a fixing nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention relates to a control method for improving the air outlet temperature of a heat pump drying unit, which is characterized in that after the unit is started to operate, the unit judges and drives a control unit 1 to control a heating switch unit A to be switched on and switched off according to an operation mode and the air outlet temperature of the drying unit detected by a temperature sensing unit B, so that the aim of automatically adjusting the air outlet temperature of the drying unit is fulfilled. The detailed technical control scheme is as follows:
when the heat pump drying unit 2 is started, if the temperature is greater than or equal to 0 and the temperature is greater than or equal to 10 seconds, the heating switch unit A is started to heat the air at the outlet of the drying unit by the heating unit 7 so as to improve the outlet air temperature of the unit, and if the temperature is less than 0 and less than 10 seconds, the heating switch unit A is closed and the heating unit stops heating the air at the outlet of the drying unit, so that the aim of adjusting the outlet air temperature of the drying unit is fulfilled; and the delta T is the difference between the set air outlet temperature of the dryer and the actual temperature sensed by the air outlet temperature sensor of the dryer unit in the drying mode, and the specified value is the maximum deviation of the indoor dry bulb temperature specified in the national standard corresponding to the unit.
As an improvement, the heating unit 7 for improving the air outlet temperature of the dryer is a plurality of stainless steel electric heating pipes, and the glass electric heating pipes are more stable and reliable than common glass electric heating pipes, so that the service life of electric heating can be prolonged, and the safety and the reliability of the unit are ensured.
As a further improvement, if the (delta T-specified value is more than or equal to 0) and the (delta T-specified value is more than or equal to 0 for 5 seconds), the heating switch unit (A) is turned on to heat the air at the outlet of the drying unit by the heating unit (7) so as to improve the outlet air temperature of the unit, and if the (delta T-specified value is less than 0) or the (delta T-specified value is more than or equal to 0 and less than 5 seconds), the heating switch unit A is turned off, the heating unit stops heating the air at the outlet of the drying unit, so that the aim of adjusting the outlet air temperature of the drying unit is fulfilled; (ii) a The 5 seconds is the preferred data that the experiment learnt, is more favorable to further improving the air-out temperature of heat pump drying unit than 10 seconds.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (6)
1. The utility model provides a heating element device for being used for improving heat pump drying unit air-out temperature which characterized in that: including the control unit (1), a temperature sensing unit (B) for detecting drying-machine air-out temperature, a heating element (7) for giving drying-machine air outlet air heating, and constitute heating switch unit (A) of heating element (7), metal crate (C), heating pipe (D), fixation nut (E), these temperature sensing unit and heating switch unit are connected with the control unit (1) electricity respectively, in addition, for easy understanding, still schematic drawing has power L in the picture, N, be used for connecting heating switch unit (A), temperature sensing unit (B), still be drawn heating switch unit (A) that constitute heating element (7), metal crate (C), heating pipe (D) and country nut (E), in order to constitute a comparatively complete system.
2. In addition, other components of the unit are indicated by arrows and numerals in the drawing, and the names of the components represented by each numeral are added with letters below the system drawing, and in the drawing, solid arrows indicate the flow direction of refrigerant, dashed arrows indicate the flow direction of air, and two-dot chain lines indicate electrical connection.
3. The method of claim 1, wherein the method comprises the steps of: the unit judges and drives the control unit (1) to control the heating unit (7) to be opened and closed according to the operation mode and the air outlet temperature of the drying unit detected by the temperature sensing unit (B), so that the aim of automatically adjusting the air outlet temperature of the heat pump drying unit is fulfilled.
4. The method of claim 1, wherein the method comprises the steps of: if the delta T-specified value is more than or equal to 0 and the delta T-specified value is more than or equal to 0 for 10 seconds, the heating switch unit (A) is turned on to heat the air at the outlet of the drying unit by the heating unit (7) so as to improve the outlet air temperature of the unit, and if the delta T-specified value is less than 0 or the delta T-specified value is more than or equal to 0 and less than 10 seconds, the heating switch unit (A) is turned off to stop heating the air at the outlet of the drying unit by the heating unit, so that the aim of adjusting the outlet air temperature of the drying unit is fulfilled.
5. The method of claim 1, wherein the method comprises the steps of: and the delta T is the difference between the set air outlet temperature of the drying unit and the actual temperature sensed by the air outlet temperature sensor of the drying unit in the drying mode.
6. The method of claim 1, wherein the method comprises the steps of: the specified value is the maximum deviation of the indoor dry bulb temperature specified in the national standard corresponding to the unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110330598.0A CN112857022A (en) | 2021-03-29 | 2021-03-29 | Heating assembly device for improving air outlet temperature of heat pump drying unit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110330598.0A CN112857022A (en) | 2021-03-29 | 2021-03-29 | Heating assembly device for improving air outlet temperature of heat pump drying unit and control method thereof |
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| CN112857022A true CN112857022A (en) | 2021-05-28 |
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| CN202110330598.0A Pending CN112857022A (en) | 2021-03-29 | 2021-03-29 | Heating assembly device for improving air outlet temperature of heat pump drying unit and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776319A (en) * | 2021-08-31 | 2021-12-10 | 常州恒创热管理有限公司 | Drying machine |
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| CN104534849A (en) * | 2014-08-22 | 2015-04-22 | 上海伯涵热能科技有限公司 | High-temperature heat pump drying machine started with heating and operating in high heating load state |
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| CN211041759U (en) * | 2019-10-17 | 2020-07-17 | 江苏捷达粮食设备有限公司 | Electric drying control device |
| CN111829215A (en) * | 2020-06-24 | 2020-10-27 | 河北博志热能设备有限公司 | Control method for improving refrigeration energy efficiency of low-temperature heat pump unit through electromagnetic valve |
| CN212058090U (en) * | 2020-02-18 | 2020-12-01 | 连云港韩德饲料有限公司 | A drying apparatus for fodder pelletization |
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2021
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534849A (en) * | 2014-08-22 | 2015-04-22 | 上海伯涵热能科技有限公司 | High-temperature heat pump drying machine started with heating and operating in high heating load state |
| CN205922814U (en) * | 2016-05-17 | 2017-02-08 | 四川蓉幸实业有限公司 | Intelligent drying system is used to prickly ash |
| CN208547191U (en) * | 2018-07-05 | 2019-02-26 | 青海瑞湖生物资源开发有限公司 | A kind of intelligent drying apparatus that can be dried automatically |
| CN109405283A (en) * | 2018-12-05 | 2019-03-01 | 江苏天舒电器有限公司 | A kind of accurate temperature controlling type heat pump hot blast stove system |
| WO2020114148A1 (en) * | 2018-12-05 | 2020-06-11 | 江苏天舒电器有限公司 | Precise temperature-control-type heat pump hot blast stove control system and control method |
| CN209893914U (en) * | 2019-04-02 | 2020-01-03 | 潘同亮 | Dampproofing processing apparatus for hydraulic engineering equipment |
| CN110243105A (en) * | 2019-06-13 | 2019-09-17 | 科希曼电器有限公司 | Heated at constant temperature type air source heat pump Drying unit |
| CN211041759U (en) * | 2019-10-17 | 2020-07-17 | 江苏捷达粮食设备有限公司 | Electric drying control device |
| CN212058090U (en) * | 2020-02-18 | 2020-12-01 | 连云港韩德饲料有限公司 | A drying apparatus for fodder pelletization |
| CN111829215A (en) * | 2020-06-24 | 2020-10-27 | 河北博志热能设备有限公司 | Control method for improving refrigeration energy efficiency of low-temperature heat pump unit through electromagnetic valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776319A (en) * | 2021-08-31 | 2021-12-10 | 常州恒创热管理有限公司 | Drying machine |
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Application publication date: 20210528 |
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