CN110671924B - Air duct structure, dryer with air duct structure and dryer control method - Google Patents
Air duct structure, dryer with air duct structure and dryer control method Download PDFInfo
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- CN110671924B CN110671924B CN201911043611.3A CN201911043611A CN110671924B CN 110671924 B CN110671924 B CN 110671924B CN 201911043611 A CN201911043611 A CN 201911043611A CN 110671924 B CN110671924 B CN 110671924B
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- heat
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims description 19
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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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
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides an air duct structure, a dryer with the air duct structure and a control method of the dryer, relates to the technical field of dryers, and solves the technical problem that the heat exchange capacity of the dryer is insufficient due to the existing air duct structure in the prior art. The air duct structure comprises a plurality of annular fins, the annular fins form a heating air duct with a circular section, so that air flow passing through the heating air duct can be heated in 360 degrees in the circular section, the heat exchange capacity is improved, and the problem of insufficient heat exchange capacity of the conventional structure is solved.
Description
Technical Field
The invention relates to the technical field of dryers, in particular to an air duct structure, a dryer with the air duct structure and a dryer control method.
Background
Along with the development of technology, the manufacturing technology of the dryer is more and more complete, and the application range of the dryer is also wider and wider. The existing dryer internal heat exchanger generally adopts a row of fins or L-shaped fin structures to exchange heat with a fan, but the row of fins or L-shaped fin structures are opposite to the fan, and the fins in the airflow passage block airflow, so that the air velocity field is uneven, the heat exchange performance is poor, and the row of fins or L-shaped fin structures can only heat air through the fins with a planar structure, so that the air cannot be heated for 360 degrees, and the heat exchange capability is reduced; meanwhile, the static pressure loss is larger due to the structure, so that the power consumption of the main motor is larger, and the whole energy consumption is further increased; meanwhile, the current dryer has low load demand, and the low pressure is low when the heat exchange capacity of the unit is insufficient, so that faults such as low pressure and the like are easy to occur, and the low load stable operation cannot be realized.
Disclosure of Invention
The invention aims to provide an air duct structure, a dryer with the air duct structure and a dryer control method, and aims to solve the technical problem that the heat exchange capacity of the dryer is insufficient due to the existing air duct structure in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides an air duct structure which comprises a plurality of annular fins, wherein the annular fins form a heating air duct with a circular section, and can be used for carrying out 360-degree omnibearing heating on passing air flow.
A dryer comprising a housing and a heat exchanger disposed therein, the number of heat exchangers being at least one and each having the duct structure of claim 1.
Optionally, an air supply fan is arranged in the air duct structure.
Optionally, a return air baffle is arranged in the shell, and the return air baffle and the shell form a return air space communicated with a return air system.
Optionally, the return air baffle with casing sliding connection, the return air baffle can follow in the casing wind channel structure length direction slides.
Optionally, the dryer further comprises a fresh air cavity, and the fresh air cavity is arranged at the inlet end of the heat exchanger.
Optionally, a fresh air fan is installed on the side wall of the fresh air cavity to provide fresh air.
Optionally, the dryer further comprises a control component, the number of the heat exchangers is multiple, and the control component is used for controlling the opening number of the heat exchangers, so that the multistage output of the dryer can be realized.
Optionally, the number of the heat exchangers is four, and the control component is at least one two-way valve for controlling the start and stop of the four heat exchangers.
Optionally, the control assembly comprises a first two-way valve, a second two-way valve and a third two-way valve, the heat exchanger comprises a first heat exchange assembly formed by connecting the first heat exchanger and a refrigerant circulation pipeline of the second heat exchanger in series, and also comprises a second heat exchange assembly formed by connecting the refrigerant circulation pipeline of the third heat exchanger and a refrigerant circulation pipeline of the fourth heat exchanger in series, the refrigerant circulation pipelines of the first heat exchange assembly and the second heat exchange assembly are connected in parallel, wherein,
the first two-way valve is arranged in a refrigerant circulation pipeline between the first heat exchanger and the second heat exchanger, the second two-way valve is arranged in a refrigerant circulation pipeline between the third heat exchanger and the fourth heat exchanger, and the third two-way valve is arranged in a branch of a parallel refrigerant circulation pipeline of the second heat exchange assembly.
The dryer comprises a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, wherein air supply fans matched with the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are respectively arranged in the first heat exchanger, the second heat exchanger and the third heat exchanger; the fresh air fan is also included; the method comprises the following specific steps:
step 1: detecting an indoor temperature T1 and determining an indoor preset temperature T2, wherein the temperature deviation delta T1 = T2-T1;
when delta T1 is less than or equal to a, only the first heat exchanger and the corresponding air supply fan are operated; when a is smaller than delta T1 and smaller than or equal to 1, only the first heat exchanger, the second heat exchanger and the corresponding air supply fans are operated; when delta T1 is more than 1 and less than or equal to b, only the first heat exchanger, the second heat exchanger and the third heat exchanger and the corresponding air supply fans are operated; when delta T1 is more than b, all the heat exchangers and the corresponding air supply fans thereof are all operated;
wherein a and b are the operation limits of the whole machine;
step 2: detecting the concentration C of the indoor carbon dioxide;
when C is less than C, the fresh air fan is closed; when C is less than or equal to C and less than or equal to d, the fresh air fan keeps the original running state; when C is more than d, the fresh air fan operates;
wherein c and d are indoor air freshness indexes.
The invention provides an air duct structure, which comprises a plurality of annular fins, wherein the annular fins form a heating air duct with a circular section, so that air flow passing through the heating air duct can be heated in 360 degrees in the circular section, the heat exchange capacity is improved, and the problem of insufficient heat exchange capacity of the conventional structure is solved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a first angle internal structure of an inner machine of a dryer according to the present invention;
FIG. 2 is a schematic view of a first angular outer structure of an inner machine of the dryer;
FIG. 3 is a schematic view of a second angular internal structure of the dryer inner machine;
FIG. 4 is a second angular outer structural schematic view of the dryer inner machine;
fig. 5 is a schematic diagram of the structure of the air inlet end face of the heat exchanger.
In the figure 1, an air duct structure; 2. an air outlet assembly; 3. an air supply fan; 4. a return air baffle; 5. a housing; 6. a return air space; 7. fresh air cavity; 8. fresh air blower; 9. a first heat exchanger; 10. a second heat exchanger; 11. a third heat exchanger; 12. and a fourth heat exchanger.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
The invention provides an air duct structure 1, as shown in fig. 1 and 3, which comprises a plurality of annular fins, wherein the annular fins form a heating air duct with a circular cross section, and can perform 360-degree omnibearing heating on air flow passing through.
The air duct structure 1 can heat the air flow passing through the heating air duct in 360-degree all-round manner in the circular section, so that the heat exchange capacity is improved, and the problem of insufficient heat exchange capacity of the conventional structure is avoided; meanwhile, the air duct structure 1 is opposite to the fan, the fins in the air flow passage can not block air flow, the heat exchange performance is not deteriorated due to uneven wind speed field, the main motor power consumption is relatively high due to large static pressure loss in the system, and the whole energy consumption is not aggravated.
A dryer, as shown in fig. 1, 3 and 4, comprising a housing 5 and a number of heat exchangers arranged therein, said number of heat exchangers being at least one and each of said heat exchangers having the air duct structure 1 of claim 1.
The heat exchanger of the dryer is provided with the air channel structure 1 with the circular cross section, air is heated through the air channel structure 1 and is discharged to the room through the air outlet component 2 for drying, the air channel structure 1 can enable air flowing in the air channel structure 1 to be heated in 360 degrees in the air channel lead with a certain length in all directions, the heat exchange capacity of the dryer is improved, no fins block air flow, the air speed field is not uniform, the heat exchange performance is not poor, and meanwhile, larger static pressure loss in the system is not caused, so that the power consumption of a main motor is larger.
As an alternative embodiment, an air supply fan 3 is disposed in the air duct structure 1.
The air supply fans 3 are arranged in the air duct structure 1, so that when the air duct structure 1 is provided with a plurality of air ducts, the air can be ensured to uniformly circulate in the air duct structure 1, and the air duct structure 1 can fully exert heat exchange performance.
As an alternative embodiment, a return air baffle 4 is disposed in the housing 5, and the return air baffle 4 and the housing 5 form a return air space 6 in communication with a return air system.
According to the invention, the air return baffle 4 is arranged in the shell 5, the air return baffle 4 and the shell 5 form an air return space 6 communicated with an air return system, the air return space 6 is positioned outside the outer wall of the air duct structure 1, the air duct structure 1 is used for heating air flow sucked from the outside, and the air return space 6 is used for heating air flow sucked from the air return system and heated indoor and is heated through the outer wall of the air duct structure 1, so that the energy consumption of the whole machine is reduced.
As an alternative embodiment, the return air baffle 4 is slidably connected with the casing 5, the return air baffle 4 can slide in the casing 5 along the length direction of the air duct structure 1, so as to change the size of the return air space 6 and the area of the outer wall of the air duct structure 1 occupied by the return air space 6, when the return air space 6 is smaller, the area of the outer wall of the occupied air duct structure 1 is smaller, the heating degree of the air passing through the return air space 6 is smaller, and when the return air space 6 is larger, the area of the outer wall of the occupied air duct structure 1 is larger, the heating degree of the air passing through the return air space 6 is larger, and different heating demands can be really met respectively.
As an alternative embodiment, the dryer further comprises a fresh air cavity 7, and the fresh air cavity 7 is arranged at the inlet end of the heat exchanger.
The dryer further comprises a fresh air cavity 7, wherein the fresh air cavity 7 is arranged at the inlet end of the heat exchanger, and the fresh air cavity 7 and the return air space 6 can ensure that the air intake passes through the heating area in the whole process, so that the air intake is uniformly heated.
As an alternative embodiment, as shown in fig. 2, a fresh air fan 8 is installed on the side wall of the fresh air cavity 7 to provide fresh air.
According to the invention, the side wall of the fresh air cavity 7 is provided with the fresh air fan 8 for providing fresh air, so that fresh air can be provided for the room, and the excessive high concentration of carbon dioxide in the room is avoided.
As an optional implementation mode, the dryer further comprises a plurality of control components, the number of the heat exchangers is controlled by the control components, the multistage output of the dryer can be realized, the low-load stable operation of the whole dryer is realized, faults such as low voltage are avoided, and the adaptability of the unit in a wide range can be improved.
As an alternative embodiment, as shown in fig. 5, the number of the heat exchangers is four, and the control component is at least one two-way valve, so as to control the start and stop of the four heat exchangers, thereby realizing the multistage output of the dryer.
As an alternative embodiment, the control assembly comprises a first two-way valve, a second two-way valve and a third two-way valve, the heat exchanger comprises a first heat exchange assembly formed by connecting a first heat exchanger 9 and a refrigerant circulation pipeline of a second heat exchanger 10 in series, and also comprises a second heat exchange assembly formed by connecting a third heat exchanger 11 and a refrigerant circulation pipeline of a fourth heat exchanger 12 in series, the refrigerant circulation pipelines of the first heat exchange assembly and the second heat exchange assembly are connected in parallel, wherein,
the first two-way valve is installed in a refrigerant circulation pipeline between the first heat exchanger 9 and the second heat exchanger 10, the second two-way valve is installed in a refrigerant circulation pipeline between the third heat exchanger 11 and the fourth heat exchanger 12, and the third two-way valve is installed in a branch of a parallel refrigerant circulation pipeline of the second heat exchange assembly.
In the invention, the second heat exchanger 10 can be closed by closing the first two-way valve, and the first heat exchanger 9, the third heat exchanger 11 and the fourth heat exchanger 12 are operated; closing the second two-way valve, enabling the fourth heat exchanger 12 to be closed, operating the first heat exchanger 9, the second heat exchanger 10 and the third heat exchanger 11; the third two-way valve is closed, the third heat exchanger 11 and the fourth heat exchanger 12 can be closed, and the first heat exchanger 9 and the second heat exchanger 10 are opened.
The dryer control method comprises the dryer, wherein the dryer comprises a first heat exchanger 9, a second heat exchanger 10, a third heat exchanger 11 and a fourth heat exchanger 12, and an air supply fan 3 matched with the first heat exchanger 9, the second heat exchanger 10, the third heat exchanger 11 and the fourth heat exchanger 12 is respectively arranged in the first heat exchanger 9, the second heat exchanger 10, the third heat exchanger 11 and the fourth heat exchanger 12; the fresh air fan 8 is also included; the method comprises the following specific steps:
step 1: detecting an indoor temperature T1 and determining an indoor preset temperature T2, wherein the temperature deviation delta T1 = T2-T1;
when deltaT 1 is less than or equal to a, only the first heat exchanger 9 and the corresponding air supply fan 3 are operated; when a is smaller than delta T1 and smaller than or equal to 1, only the first heat exchanger 9, the second heat exchanger 10 and the corresponding air supply fans 3 are operated; when deltaT 1 is more than 1 and less than or equal to b, only the first heat exchanger 9, the second heat exchanger 10 and the third heat exchanger 11 and the air supply fans 3 corresponding to the two heat exchangers are operated; when delta T1 is more than b, all the heat exchangers and the corresponding air supply fans 3 are all operated;
wherein a and b are the operation limits of the whole machine;
step 2: detecting the concentration C of the indoor carbon dioxide;
when C is less than C, the fresh air fan 8 is turned off; when C is less than or equal to C and less than or equal to d, the fresh air fan 8 keeps the original running state; when C is more than d, the fresh air fan 8 operates;
wherein c and d are indoor air freshness indexes.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a dryer, includes casing and the heat exchanger of setting in it, its characterized in that: the number of the heat exchangers is at least one, and each heat exchanger is provided with an air duct structure; the air duct structure comprises a plurality of annular fins, and the annular fins form a heating air duct with a circular section, so that 360-degree omnibearing heating can be carried out on the passing air flow; a return air baffle is arranged in the shell, and a return air space communicated with a return air system is formed by the return air baffle and the shell; the air return baffle is in sliding connection with the shell, and the air return baffle can slide along the length direction of the air channel structure in the shell.
2. The dryer of claim 1, wherein: an air supply fan is arranged in the air duct structure.
3. The dryer of claim 1, wherein: the dryer also comprises a fresh air cavity, and the fresh air cavity is arranged at the inlet end of the heat exchanger.
4. A dryer as claimed in claim 3, characterized in that: and a fresh air fan is arranged on the side wall of the fresh air cavity to provide fresh air.
5. A dryer according to any one of claims 1 to 4, characterized in that: the dryer also comprises a control assembly, the number of the heat exchangers is multiple, and the control assembly is used for controlling the opening number of the heat exchangers, so that the multistage output of the dryer can be realized.
6. The dryer of claim 5, wherein: the number of the heat exchangers is four, and the control component is at least one two-way valve used for controlling the start and stop of the four heat exchangers.
7. The dryer of claim 6, wherein: the control assembly comprises a first two-way valve, a second two-way valve and a third two-way valve, the heat exchanger comprises a first heat exchange assembly formed by connecting a first heat exchanger and a refrigerant circulation pipeline of a second heat exchanger in series, and also comprises a second heat exchange assembly formed by connecting a third heat exchanger and a refrigerant circulation pipeline of a fourth heat exchanger in series, the first heat exchange assembly and the refrigerant circulation pipeline of the second heat exchange assembly are connected in parallel,
the first two-way valve is arranged in a refrigerant circulation pipeline between the first heat exchanger and the second heat exchanger, the second two-way valve is arranged in a refrigerant circulation pipeline between the third heat exchanger and the fourth heat exchanger, and the third two-way valve is arranged in a branch of a parallel refrigerant circulation pipeline of the second heat exchange assembly.
8. A dryer control method, characterized in that: the dryer comprises a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, wherein an air supply fan matched with the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger are respectively arranged; the fresh air fan is also included; the method comprises the following specific steps:
step 1: detecting an indoor temperature T1 and determining an indoor preset temperature T2, wherein the temperature deviation delta T1 = T2-T1;
when delta T1 is less than or equal to a, only the first heat exchanger and the corresponding air supply fan are operated; when a is smaller than delta T1 and smaller than or equal to 1, only the first heat exchanger, the second heat exchanger and the corresponding air supply fans are operated; when delta T1 is more than 1 and less than or equal to b, only the first heat exchanger, the second heat exchanger and the third heat exchanger and the corresponding air supply fans are operated; when delta T1 is more than b, all the heat exchangers and the corresponding air supply fans thereof are all operated;
wherein a and b are the operation limits of the whole machine;
step 2: detecting the concentration C of the indoor carbon dioxide;
when C is less than C, the fresh air fan is closed; when C is less than or equal to C and less than or equal to d, the fresh air fan keeps the original running state; when C is more than d, the fresh air fan operates;
wherein c and d are indoor air freshness indexes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911043611.3A CN110671924B (en) | 2019-10-30 | 2019-10-30 | Air duct structure, dryer with air duct structure and dryer control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911043611.3A CN110671924B (en) | 2019-10-30 | 2019-10-30 | Air duct structure, dryer with air duct structure and dryer control method |
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| Publication Number | Publication Date |
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| CN110671924A CN110671924A (en) | 2020-01-10 |
| CN110671924B true CN110671924B (en) | 2023-07-11 |
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| CN112082373B (en) * | 2020-09-03 | 2024-01-26 | 珠海格力电器股份有限公司 | Dryer and dryer control method |
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| CN109959076A (en) * | 2019-04-10 | 2019-07-02 | 重庆大学 | A kind of room temperature control ventilation system and its control method |
| CN211316907U (en) * | 2019-10-30 | 2020-08-21 | 珠海格力电器股份有限公司 | Air duct structure and drying machine with same |
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2019
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| CN2393066Y (en) * | 1999-11-01 | 2000-08-23 | 广东科龙空调器有限公司 | Ring disk column type heat exchanger |
| CN105276868A (en) * | 2015-11-17 | 2016-01-27 | 珠海格力电器股份有限公司 | Air conditioner heat exchanger and air conditioner |
| CN206522856U (en) * | 2017-03-07 | 2017-09-26 | 重庆大学 | A kind of Fresh air handling units regulator control system suitable for radiation air-conditioner |
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