CN111288687A

CN111288687A - Multistage dehumidification heating air source heat pump system for line and surface drying

Info

Publication number: CN111288687A
Application number: CN202010209462.XA
Authority: CN
Inventors: 王保法; 陈洁; 刘跃铭; 裴建敏; 朱俊友; 汪磊
Original assignee: Henan Haifuxing Heat Exchange Technology Co ltd
Current assignee: Henan Haifuxing Heat Exchange Technology Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-06-16

Abstract

The invention discloses a multistage dehumidification heating air source heat pump system for line-surface drying, which comprises a drying chamber, a hot air inlet pipe, a damp air exhaust pipeline, an air source heat pump device and a control structure, wherein the air source heat pump device is provided with an air supply and return room, a heat pump room and a fresh air exhaust room which are sequentially connected, a first air valve is arranged in the air supply and return room, the air supply and return room is divided into a first cavity and a second cavity by the first air valve, a partition plate is arranged in the heat pump room, the heat pump room is divided into a third cavity and a fourth cavity by the partition plate, a fifth air valve is arranged in the fresh air exhaust room, a third fan is arranged at the fifth air valve, and the fifth air valve divides the fresh air exhaust room into a fifth cavity and a sixth cavity. The invention can keep constant temperature, constant humidity and constant wind in the drying chamber, thereby achieving the purpose that the line and the surface can be continuously produced all the year around in different areas.

Description

Multistage dehumidification heating air source heat pump system for line and surface drying

Technical Field

The invention relates to comprehensive utilization of new energy equipment technology in the field of drying in manual line and noodle industrial production, in particular to a comprehensive utilization system for manual line and noodle drying, which utilizes heating, dehumidification, cooling and waste heat of an air source heat pump to maintain constant temperature, humidity and wind in a drying chamber.

Background

The line surface (stretched surface) has a long history in China, is a regional traditional low-heat-energy health food in China, and the manual line surface is formed by pure manual drawing, is thin like hair, is slightly yellow and transparent, and is deeply loved by vast consumers. The production process of the manual noodle is characterized by low production efficiency through the procedures of kneading, splitting, winding, stretching, putting noodle rods on a shelf, airing and dehydrating, cutting to a fixed length, metering and packaging and the like.

In recent years, with continuous research and development of the mechanical manufacturing and automatic control technology in China, automation can be realized by simulating manual dough mixing, stretching, rod hanging, racking, fixed-length cutting and metering packaging in a mechanical mode, so that the labor intensity of workers is greatly reduced, and the yield is improved. Therefore, there is a trend that the conventional manual line surface making is replaced by a machine.

However, the processing technology and product appearance of the manual noodles are greatly different from those of the traditional machine-made dried noodles, the drying technology of the traditional machine-made dried noodles cannot meet the drying requirement of the noodles, even the noodles are not too high in temperature and humidity and are easy to strip, so that the research of simulating the temperature and humidity of the natural drying environment to carry out large-scale drying is less, which is the pain point that the noodles cannot be produced all the year round and can only be produced by watching the day.

In view of the above, the invention provides a multistage dehumidification heating air source heat pump system for line and surface drying by combining the traditional process with the modern technology, and by utilizing the comprehensive functions of heating, refrigerating, dehumidifying and the like of the air source heat pump, a closed environment suitable for low-humidity and low-temperature drying of the traditional line and surface is created, the influence of natural external environment is avoided, the traditional manual surface can be continuously produced all the year round, and the safety of opposite food is greatly improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a multistage dehumidification heating air source heat pump system for line and surface drying, which can keep constant temperature, constant humidity and constant air in a drying chamber, thereby achieving the purpose that the line and the surface can be continuously produced all the year around in different areas.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a multi-stage dehumidification heating air source heat pump system for line-surface drying, comprising:

the drying chamber is provided with a drying space, an air inlet and an air outlet which are communicated with the drying space;

the hot air inlet pipe is communicated with the air inlet of the drying chamber, extends into the drying chamber, and is provided with a plurality of air supply openings at the part extending into the drying chamber;

the moisture exhaust air pipeline is communicated with an air outlet of the drying chamber;

the air source heat pump device is provided with an air supply and return room, a heat pump room and a fresh air exhaust room which are sequentially connected, wherein a first air valve is arranged in the air supply and return room, the first air valve divides the air supply and return room into a first cavity and a second cavity, a moisture exhaust air inlet and a hot air outlet are respectively formed in the air supply and return room, the moisture exhaust air inlet is communicated with the first cavity, the hot air outlet is communicated with the second cavity, a first fan is arranged at the hot air outlet, the other end of a moisture exhaust air pipeline is communicated with the moisture exhaust air inlet, the other end of a hot air inlet pipe is communicated with the hot air outlet, a second fan communicated with the first cavity is further arranged in the air supply and return room, and a second air valve is arranged at the second fan;

a partition plate is arranged in the heat pump room, the partition plate divides the heat pump room into a third chamber and a fourth chamber, the third chamber is communicated with the first chamber, a third air valve is arranged between the first chamber and the third chamber in a connecting manner, a first fresh air inlet is formed in one side of the heat pump room, the first fresh air inlet is communicated with the third chamber, the fourth air valve is arranged at the first fresh air inlet, a heat pump component is arranged in the heat pump room, the heat pump component comprises a compressor, a condenser, an expansion valve and an evaporator which are connected in a circulating manner through refrigerant pipelines, the evaporator is arranged in the third chamber, and the condenser is arranged in the fourth chamber;

a fifth air valve is arranged in the fresh air exhaust room, a third fan is arranged at the fifth air valve, the fresh air exhaust room is divided into a fifth cavity and a sixth cavity by the fifth air valve, a fourth fan communicated with the fifth cavity is further arranged on the fresh air exhaust room, a sixth air valve is arranged at the fourth fan, a second fresh air inlet is further formed in the fresh air exhaust room, the second fresh air inlet is communicated with the sixth cavity, and a seventh air valve is arranged at the second fresh air inlet;

the control structure comprises a controller, wherein the controller is electrically connected with the first fan, the second fan, the third fan, the fourth fan, the first air valve, the second air valve, the third air valve, the fourth air valve, the fifth air valve, the sixth air valve, the seventh air valve and the heat pump assembly.

As an optimization of the structure of the invention, a conveying line for hanging the line surface and conveying the line surface along the left and right directions is arranged in the drying chamber.

As one optimization of the structure of the invention, a plurality of pressure fans are arranged in the drying chamber and are positioned between the hot air inlet pipe and the conveying line.

As an optimization of the structure of the present invention, the control structure comprises:

the first temperature and humidity sensor is arranged in the drying chamber and used for sensing the temperature and the humidity in the drying chamber;

when the temperature in the drying chamber is smaller than the minimum value of the set temperature range, the first temperature and humidity sensor transmits a temperature rise signal to the controller, and the controller controls the air source heat pump device to improve the heating efficiency;

when the temperature in the drying chamber is greater than the maximum value of the set temperature, the first temperature and humidity sensor transmits a cooling signal to the controller, and after the controller receives the cooling signal, if the air source heat pump device is in operation, the air source heat pump device is controlled to reduce the heating efficiency until the heating is stopped;

when the humidity in the drying chamber is larger than the maximum value of the set range value, the first temperature and humidity sensor outputs a humidity increasing signal to the controller, and the controller controls the air source heat pump device to improve the humidity discharging efficiency;

and when the humidity in the drying chamber is smaller than the minimum value of the set range value, the first temperature and humidity sensor outputs a humidity reducing and discharging signal to the controller, and the controller controls the air source heat pump device to reduce the humidity discharging action until the humidity discharging action is stopped.

As an optimization of the structure of the present invention, the control structure further comprises:

and the second temperature and humidity sensor is arranged outside the drying chamber and used for sensing the temperature and the humidity outside the drying chamber.

As an optimization of the structure of the invention, N-stage evaporators are alternately arranged in the third chamber along the upstream direction and the downstream direction at intervals, and the N-stage evaporators are respectively a first-stage evaporator to an nth-stage evaporator.

As an optimization of the structure of the invention, N-stage condensers are alternately arranged in the fourth chamber along the upstream direction and the downstream direction at intervals, and the N-stage condensers are respectively a first-stage condenser to an nth-stage condenser.

As an optimization of the structure of the invention, the first fresh air inlet is provided with a first fresh air filter at the position inside the heat pump room.

As an optimization of the structure of the invention, a second fresh air filter is arranged at the position of the second fresh air inlet in the fresh air exhaust room.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the opening and closing of different air valves and fans and the number of running compressors can be controlled and adjusted through the controller according to the change of outdoor temperature and humidity, so that dehumidification and heating are realized, temperature and humidity adjustment is realized through different circulation modes of the air duct, automatic and convenient adjustment is realized, and a drying effect which cannot be achieved by other units is achieved;

and parameters in the heat pump and the drying chamber can be set according to the temperature and humidity parameters of the local heat pump and the local drying chamber all the year round according to different regions, so that the noodles made by different manufacturing methods can achieve good drying effect;

in addition, the invention realizes automatic control through the controller, and can ensure that constant temperature, constant humidity and constant air can be achieved in the drying chamber no matter how the temperature and the humidity of the outdoor environment change, thereby achieving the purpose that the line and the surface can be continuously produced in different areas all the year round.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of a multi-stage dehumidification heating air source heat pump system for line and surface drying of the present invention;

FIG. 2 is a perspective view of the air source heat pump apparatus of the present invention;

FIG. 3 is a schematic diagram (in a top view) of the internal structure of the multi-stage dehumidification heating air source heat pump system for line and surface drying according to the present invention;

FIG. 4 is a schematic illustration of a heat pump assembly;

labeled as: 1. a drying chamber, 2, an air outlet, 3, a conveying line, 4, a hot air inlet pipe, 5, an air supply port, 6, a moisture exhaust air pipeline, 7, an air source heat pump device, 8, an air supply and return room, 9, a heat pump room, 10, a fresh air and exhaust room, 11, a first air valve, 12, a first cavity, 13, a second cavity, 14, a moisture exhaust air inlet, 15, a hot air outlet, 16, a first fan, 17, a second fan, 18, a second air valve, 19, a partition board, 20, a third cavity, 21, a fourth cavity, 22, a third air valve, 23, a first fresh air inlet, 24, a fourth air valve, 25, a compressor, 26, a condenser, 27, an expansion valve, 28, an evaporator, 29, a fifth air valve, 30, a third fan, 31, a fifth cavity, 32, a sixth cavity, 33, a fourth fan, 34, a sixth air valve, 35, a second inlet, 36, a seventh air valve, 37, a first temperature and humidity sensor, 38. a second temperature and humidity sensor 39, a pressure fan 40, a first fresh air filter 41 and a second fresh air filter.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or circuit connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

Referring to fig. 1-4, the multistage dehumidification heating air source heat pump system for line and surface drying according to the present invention has the following general structure:

this a multistage dehumidification heating air source heat pump system for line face is dry includes drying chamber 1, drying chamber 1 has the drying space, and with air intake and the air exit 2 of drying space intercommunication, in addition, still be equipped with the transfer chain 3 that is used for hanging the line face and follows left right direction transfer chain face in the drying chamber 1, like this, hot-blast can be by air intake enter into drying chamber 1 in, carry out drying process to the line face on transfer chain 3, simultaneously, hot-blast and line face carry out the damp and hot waste gas that the heat exchange produced then by air exit 2 discharges.

In addition, be connected with hot-blast admission pipe 4 on the air intake, this hot-blast admission pipe 4 communicates with the air intake of drying chamber 1, and this hot-blast admission pipe 4 stretches into in the drying chamber 1, and hot-blast admission pipe 4 stretches into the part of drying chamber 1 and has seted up a plurality of air supply wind gaps 5, the air supply wind gap 5 of seting up on the hot-blast admission pipe 4 of hot-blast accessible like this enters into in the drying chamber 1 to carry out drying process to the line face in the drying chamber 1, equally, be connected with moisture exhaust duct 6 on the air exit 2, the damp and hot waste gas that hot-blast and line face carry out the heat exchange production is then discharged by moisture exhaust duct 6.

In order to keep the constant temperature, humidity and air pressure state in the drying chamber 1 and achieve the purpose that the line surface can be continuously produced all year round in different areas, the invention is further provided with an air source heat pump device 7, the air source heat pump device 7 is composed of an air supply and return room 8, a heat pump room 9 and a fresh air exhaust room 10 which are sequentially connected, the air source heat pump device 7 is integrally cuboid in shape, specifically, a first air valve 11 is arranged in the air supply and return room 8, preferably, the first air valve 11 is vertically arranged and is positioned in the center of the air supply and return room 8, the circumferential outer wall of the first air valve 11 is connected to the inner wall of the air supply and return room 8, and the first air valve 11 divides the air supply and return room 8 into a first cavity 12 and a second cavity 13, therefore, the first cavity 12 and the second cavity 13 can be communicated and closed through the opening and closing of the first air valve 11, meanwhile, a moisture exhaust inlet 14 and a hot air outlet 15 are respectively arranged on the air supply and return room 8, the damp-heat exhaust air inlet 14 is communicated with the first cavity 12, the hot air outlet 15 is communicated with the second cavity 13, the first fan 16 is arranged at the hot air outlet 15, one end of the damp-heat exhaust air pipeline 6, which is positioned outside the drying chamber 1, is communicated with the damp-heat exhaust air inlet 14, one end of the hot air inlet pipe 4, which is positioned outside the drying chamber 1, is communicated with the hot air outlet 15, the second fan 17, which is communicated with the first cavity 12, is further arranged on the air supply return room 8, and the second fan 17 is provided with the second air valve 18, so that when damp-heat waste gas generated by the drying chamber 1 needs to be timely exhausted, only the first air valve 11 needs to be closed, and the second fan 17 and the second air valve 18 are opened, and the damp-heat waste gas is exhausted out of the air source heat pump device 7 under the action of the second fan 17.

Further, a partition plate 19 is arranged in the heat pump room 9, preferably, the partition plate 19 is vertically arranged and located in the center of the heat pump room 9, the partition plate 19 divides the heat pump room into a third chamber 20 and a fourth chamber 21, the third chamber 20 is communicated with the first chamber 12, the fourth chamber 21 is communicated with the second chamber 13, a third air valve 22 is arranged between the first chamber 12 and the third chamber 20, preferably, the third air valve 22 is vertically arranged, a first fresh air inlet 23 is formed in the side wall of the heat pump room 9, the first fresh air inlet 23 is communicated with the third chamber 20, and a fourth air valve 24 is arranged at the first fresh air inlet 23.

In addition, a heat pump assembly is arranged in the heat pump room 9, the heat pump assembly is provided with a plurality of groups, the pump assembly comprises a compressor 25, a condenser 26, an expansion valve 27 and an evaporator 28 which are circularly connected through a refrigerant pipeline, the evaporator 28 is arranged in the third chamber 20, the condenser 26 is arranged in the fourth chamber 21, and thus, the heat pump assembly can absorb heat by the operation of the compressor 25 through the evaporation of the refrigerant in the evaporator 28 through the expansion valve 27 and transfer the heat absorbed by the evaporator 28 to the condenser 26 for releasing.

Preferably, N-stage evaporators are alternately arranged in the third chamber 20 along the upstream direction and the downstream direction at intervals, the N-stage evaporators are respectively a first-stage evaporator to an nth-stage evaporator (N is an integer), and when air sequentially passes through the first-stage evaporator to the nth-stage evaporator from the upstream direction to the downstream direction, the temperature of the air flow is gradually reduced. The temperature of the air stream is highest at the first stage evaporator, as is the refrigerant pressure (i.e., the evaporating pressure) in the first stage evaporator. The temperature of the airflow at the nth stage evaporator is the lowest after being cooled by the multistage evaporator, and the pressure (i.e. evaporation pressure) of the refrigerant in the nth stage evaporator is also the lowest.

Similarly, N-stage condensers (N is an integer) are alternately arranged in the fourth chamber 21 along the upstream direction and the downstream direction at intervals, the N-stage condensers are respectively a first-stage condenser to an nth-stage condenser, and the air temperature gradually rises when the air sequentially passes through the first-stage condenser to the nth-stage condenser from the upstream direction to the downstream direction. The temperature of the gas stream at the first stage condenser is lowest and the pressure of the refrigerant in the first stage condenser (i.e., the condensing pressure) is also lowest. The temperature of the air flow at the Nth-stage condenser is highest after the air flow is heated by the multi-stage condenser, and the pressure (namely, the condensing pressure) of the refrigerant in the Nth-stage condenser is also highest.

Therefore, the first-stage evaporator and the Nth-stage condenser belong to the same heat pump system, so that the highest evaporation pressure and the highest condensation pressure can correspond to each other; similarly, the nth stage evaporator and the first stage condenser belong to the same heat pump system, so that the lowest evaporation pressure corresponds to the lowest condensation pressure. Similarly, the N-1 st stage evaporator and the second stage condenser belong to the same heat pump system, so that the second lowest evaporating pressure and the second lowest condensing pressure can correspond to each other. Therefore, the controller can adjust the starting number of the compressors in time according to the temperature and humidity conditions of different areas all the year round so as to meet the requirements of the air source heat pump system on the temperature and humidity.

A fifth air valve 29 is arranged in the fresh air exhaust room 10, preferably, the fifth air valve 29 is vertically arranged and is located in the center of the fresh air exhaust room 10, a third fan 30 is arranged at the fifth air valve 29, the fifth air valve 29 divides the fresh air exhaust room 10 into a fifth chamber 31 and a sixth chamber 32, the fifth chamber 31 is communicated with the third chamber 20, similarly, the sixth chamber 32 is communicated with the fourth chamber 21, a fourth fan 33 communicated with the fifth chamber 31 is further arranged on the fresh air exhaust room 10, a sixth air valve 34 is arranged at the fourth fan 33, a second fresh air inlet 35 is further arranged on the fresh air exhaust room 10, the second fresh air inlet 35 is communicated with the sixth chamber 32, and a seventh air valve 36 is arranged at the second fresh air inlet 35, so that when the first air valve 11, the second air valve 18, the fifth air valve 20, the fifth air valve 32, and the sixth air chamber 32 are arranged in a vertical direction, the fresh air exhaust room 10 is divided into the fifth chamber 31 and the sixth chamber 32, the, The fourth air valve 24, the sixth air valve 34 and the seventh air valve 36 are closed, the third air valve 22 and the fifth air valve 29 are opened, air entering from the moisture exhaust air inlet 14 firstly passes through the first chamber 12, the third chamber 20 and the fifth chamber 31, then enters the sixth chamber 32, the fourth chamber 21 and the second chamber 13, and finally exits from the hot air outlet 15, and the flow track of the air in the air source heat pump device 7 is in a U-shaped track.

In order to realize the intelligent temperature control and humidity control of the multi-stage dehumidification heating air source heat pump system, the invention further provides a control structure (not shown in the figure), wherein the control structure comprises a controller, and the controller is electrically connected with the first fan 16, the second fan 17, the third fan 30, the fourth fan 33, the first air valve 11, the second air valve 18, the third air valve 22, the fourth air valve 24, the fifth air valve 29, the sixth air valve 34, the seventh air valve 36 and the heat pump component.

Further preferably, the control structure includes: the first temperature and humidity sensor 37 is arranged in the drying chamber 1 and used for sensing the temperature and the humidity in the drying chamber 1, and the first temperature and humidity sensor 37 is electrically connected with the controller;

when the temperature in the drying chamber 1 is smaller than the minimum value of the set temperature range, the first temperature and humidity sensor 37 transmits a temperature rise signal to the controller, and the controller controls the air source heat pump device 7 to improve the heating efficiency;

when the temperature in the drying chamber 1 is higher than the maximum value of the set temperature, the first temperature and humidity sensor 37 transmits a cooling signal to the controller, and after the controller receives the cooling signal, if the air source heat pump device 7 is running, the air source heat pump device 7 is controlled to reduce the heating efficiency until the heating is stopped;

when the humidity in the drying chamber 1 is larger than the maximum value of the set range value, the first temperature and humidity sensor 37 outputs a humidity increasing and discharging signal to the controller, and the controller controls the air source heat pump device 7 to improve the humidity discharging efficiency;

and when the humidity in the drying chamber 1 is smaller than the minimum value of the set range value, the first temperature and humidity sensor 37 outputs a humidity reducing and discharging signal to the controller, and the controller controls the air source heat pump device 7 to reduce the humidity discharging action until the humidity discharging action is stopped.

Further, the control structure further comprises: and a second temperature and humidity sensor 38 disposed outside the drying chamber 1 for sensing the temperature and humidity outside the drying chamber 1, wherein the second temperature and humidity sensor 38 is electrically connected to the controller.

Based on the structure composition, the invention can process air to keep constant temperature, constant humidity and constant wind in the drying chamber 1 all the year round, and specifically comprises the following steps: the temperature is required to be 20-25 ℃, the humidity is 45-55%, and the wind speed is 0.8 m/s; the temperature error is less than or equal to 2 ℃, the humidity error is less than or equal to 5 percent, the wind speed error is less than or equal to 0.2 percent, and the temperature, the humidity and the wind speed can be automatically set in an adjustable state or manually set.

The compressor N corresponds to the evaporator N and the condenser N, generally the N is set to be 1-3, and can be customized according to the specific conditions of the temperature and the humidity of different regions throughout the year, namely, the compressor N can be set to be 2-level, 3-level and 4-level compression, dehumidification and heating according to the correlation values of the processing air volume, the air humidity and the like.

In addition, according to the requirements of different air inlet and outlet humiture, the controller adjusts the opening and closing states of the fan and the air valve, adjusts the trend of air inlet and outlet, achieves multiple wind direction operation tracks such as full-closed operation, semi-closed operation and open operation, and is free to adjust.

Meanwhile, the compressor can automatically adjust the starting number according to the requirements of dehumidification capacity and heating capacity, so that the energy-saving effect is achieved, and the compressor is suitable for working condition requirements in different seasons.

Preferably, a plurality of pressure fans 39 are arranged in the drying chamber 1, and the pressure fans 39 are located between the hot air inlet pipe 4 and the conveying line 3, so that hot air from the air supply outlet 5 can be blown to the line surface on the conveying line 3, and the drying efficiency of the line surface is improved.

Preferably, a first fresh air filter 40 is arranged at a position, in which the first fresh air inlet 23 is located inside the heat pump room, and similarly, a second fresh air filter 41 is arranged at a position, in which the second fresh air inlet 35 is located inside the fresh air exhaust room, so that it can be ensured that fresh air entering from the first fresh air inlet 23 and the second fresh air inlet 35 is clean, and the cleanness and sanitation of the line surface are ensured.

Further, the controller is a PLC controller, and the model of the controller is set to STM32F103C8T 6.

When the multistage dehumidification heating air source heat pump system for line and surface drying is used, the controller can acquire information of the first temperature and humidity sensor 37 and the second temperature and humidity sensor 37 in real time, compares the information with a set threshold value, and controls the opening and closing of the corresponding fan and air valve and the starting number of the compressor according to the comparison result, wherein the specific regulation conditions are as follows:

① summer operation mode, when the second temperature and humidity sensor 38 measures the outdoor temperature and humidity to be higher, the second air valve 18 is opened, the second fan 17 is opened, the third air valve 22 and the first air valve 11 are closed, the exhaust air entering the air source heat pump device 7 is directly exhausted, in addition, the fourth air valve 24 and the fifth air valve 29 are opened, the sixth air valve 34 and the seventh air valve 36 are closed, the third fan 30 and the first fan 16 are opened, the fourth fan 33 is closed, outdoor fresh air enters the evaporator channel through the first fresh air filter 40 on the side of the heat pump room 9, according to the temperature and humidity requirements, different numbers of compressors 25 are opened for operation, the air cooled by the evaporator 28 enters the sixth cavity 32 through the fifth air valve 29 channel, and enters the condenser 26 channel for gradual heating under the action of the third fan 30, the heated hot air enters the drying chamber 1 through the hot air inlet pipe 4, and meets the air volume and air volume requirements, thereby achieving the purpose of line-surface drying.

② operation mode in spring and autumn, when the second temperature and humidity sensor 38 measures that the outdoor temperature and humidity is suitable for the indoor drying requirement, the second air valve 18 is opened, the second fan 17 is opened, the third air valve 22 and the first air valve 11 are closed, the moisture exhausting air entering the air source heat pump device 17 is directly exhausted, meanwhile, the fourth fan 33 and the third fan 30 are closed, the first fan 16 is opened, the fourth air valve 24, the sixth air valve 34 and the fifth air valve 29 are closed, the seventh air valve 36 is opened, the external natural air enters the condenser 26 channel through the second fresh air filter 41 and the seventh air valve 36, all the compressors 25 are not operated, and the natural air enters the drying chamber 1 under the action of the first fan 16 to dry the line surface.

③ winter operation mode, because outdoor environment temperature is low and humidity is small, air can be sent to the drying chamber 1 to dry the line surface by heating outdoor temperature, the second fan 17 and the third fan 30 are closed by the control of the controller, the fourth fan 33 and the first fan 16 operate, the second air valve 18, the first air valve 11, the fourth air valve 24 and the fifth air valve 29 are closed, the third air valve 22, the sixth air valve 34 and the seventh air valve 36 are opened, a certain number of compressors 25 are opened to work according to the temperature and humidity requirements, the high-temperature and high-humidity moisture-removing air of the drying chamber enters the air source heat pump device 7 through the moisture-removing air pipeline 6 of the heat pump unit, enters the evaporator 28 channel under the action of the fourth fan 33, the high-temperature and high-humidity air passes through the multistage moisture-removing air to remove condensed water, the heat is removed out of the drying chamber through the opened sixth air valve 34, the outdoor fresh air passes through the second inlet 35 and the second air valve 41 to enter the condenser 26 under the action of the first fan 16 to heat the drying chamber 1 to dry the line surface.

Therefore, according to the invention, the opening and closing of different air valves and fans and the number of running compressors can be controlled and adjusted through the controller according to the change of outdoor temperature and humidity, so that dehumidification and heating are realized, the temperature and humidity adjustment is realized through different circulation modes of the air duct, the automatic and convenient adjustment is realized, and the drying effect which cannot be achieved by other units is achieved. And parameters in the heat pump and the drying chamber can be set according to the temperature and humidity parameters of the local heat pump and the local drying chamber all the year round according to different regions. The good drying effect of the noodles made by different manufacturing methods is ensured.

Moreover, the controller of the system automatically controls the drying chamber to ensure that constant temperature, constant humidity and constant air can be achieved in the drying chamber no matter how the temperature and the humidity of the outdoor environment change, so that the purpose that the line and the surface can be continuously produced all the year around in different areas is achieved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage dehumidification heating air source heat pump system for line-surface drying, comprising:

2. The multi-stage dehumidification heating air source heat pump system for line surface drying according to claim 1, wherein a conveying line for hanging the line surface and conveying the line surface in a left-right direction is provided in the drying chamber.

3. The multi-stage dehumidification heating air source heat pump system for line and surface drying as claimed in claim 2, wherein a plurality of pressure fans are arranged in the drying chamber, and the pressure fans are located between the hot air inlet pipe and the conveying line.

4. The multi-stage dehumidification heating air source heat pump system for line-and-surface drying of claim 1, wherein the control structure comprises:

5. The multi-stage dehumidification heating air source heat pump system for line-and-surface drying of claim 1, wherein the control structure further comprises:

6. The multi-stage dehumidification heating air source heat pump system for line and surface drying as claimed in claim 1, wherein N-stage evaporators are alternately arranged in the third chamber along upstream and downstream directions, and the N-stage evaporators are respectively a first-stage evaporator to an N-stage evaporator.

7. The multi-stage dehumidification heating air source heat pump system for line and surface drying as claimed in claim 6, wherein N-stage condensers are alternately arranged in the fourth chamber along upstream and downstream directions, and the N-stage condensers are respectively a first-stage condenser to an Nth-stage condenser.

8. The multi-stage dehumidification heating air source heat pump system for line and surface drying as claimed in claim 1, wherein the first fresh air inlet is provided with a first fresh air filter at a position inside the heat pump room.

9. The multi-stage dehumidification heating air source heat pump system for line and surface drying as claimed in claim 1, wherein a second fresh air filter is arranged at a position of the second fresh air inlet inside the fresh air exhaust room.