CN105783472A - Heat pump-type vermicelli drying equipment - Google Patents

Abstract

The invention discloses a heat pump type dried noodle drying equipment, which comprises a drying room, which is located at the lower part of the heat pump host room, one end of the drying room is provided with an inlet of a noodle conveying line, the other end is an outlet, and a hot air blower is hung On the top of the drying room, the hot air blower includes the condenser of the heat pump and the circulation fan. There is a ceiling fan suspended on the top of the drying room. The dehumidification system is located at the bottom of the drying room. The bottom of the dry room, the other end is connected to the inlet of the heat pump main room. The inlet of the heat pump main room is equipped with a dehumidification fan. At least one heat pump host is placed in the host room. An exhaust fan is installed on the front wall of the heat pump host room, and an exhaust damper is installed on the rear wall. The fresh air damper is placed on the upper part of the drying room. One end of the heat pump host is connected to a drainage system. .

Description

A heat pump type dry noodle drying equipment

Technical field:

The invention relates to the field of heat pump drying equipment, in particular to the technical field of food processing equipment, and is especially suitable for drying vermicelli.

Background technique:

At present, air source heat pumps are mostly used for dry noodles. The heated air is sent into the drying room, and it is directly discharged in the form of waste gas after heat exchange with the noodles. However, the waste gas contains steam latent heat and high-temperature sensible heat, resulting in a lot of waste of energy. Moreover, the air source heat pump is greatly affected by the ambient temperature, which is not conducive to large-scale application across the country.

As we all know, heat pump drying equipment is a special equipment for drying materials. The heat pump provides heat supply for the drying equipment, and sends the heated airflow into the drying chamber. The high-temperature dry airflow takes away the water vapor in the material, so as to achieve the purpose of drying. As the high-temperature airflow continues to take away water vapor, the temperature of the airflow gradually decreases, the humidity increases, and the dehydration ability of the material gradually decreases; when the airflow humidity reaches the set humidity target, a part of the hot and humid air in the drying room is discharged and introduced into the environment Dry air to continue the dehydration drying process. At present, the heat pump drying equipment is limited by the characteristics of the heat pump. In the lower ambient temperature, the heating capacity and energy efficiency ratio of the heat pump are relatively low. Because the drying process of the material is not affected by the season and the ambient temperature, the drying process will be carried out throughout the year, so in the selection Heat pumps are often matched according to the heat load at low ambient temperature. At this time, the selection of heat pump equipment will be large, which not only increases the initial investment of drying equipment, but also lowers the energy efficiency of heat pump drying equipment at low ambient temperature. Energy-saving advantages Weakened, and when the ambient temperature is high, the utilization rate of the heat pump equipment is very low. On the other hand, the hot and humid air discharged from the heat pump drying equipment is not effectively utilized, and most of the heat is discharged into the environment, resulting in waste of heat.

Invention content:

The task of the present invention is to propose a heat pump type dried noodle drying equipment which utilizes the heat of dehumidification and reduces the production cost without increasing the equipment.

The task of the present invention is accomplished like this, it comprises drying room, it is characterized in that: drying room is positioned at the bottom of heat pump host room, one end of drying room is provided with the entrance of vermicelli conveying line, and its other end is outlet, described The hot air blower is suspended on the top of the drying room. The hot air blower includes a heat pump condenser and a circulating fan. A ceiling fan is suspended on the top of the drying room. The dehumidification system is located at the bottom of the drying room. One end of the pipe is placed at the bottom of the drying chamber, and the other end is connected to the inlet of the heat pump main room. The inlet of the heat pump main room is equipped with a dehumidification fan, and the outlet of the bottom of the dehumidification air pipe is equipped with a damper. The heat pump main room is located in the drying room. In the upper part of the room, at least one heat pump host is placed in the heat pump host room. An exhaust fan is installed on the front wall of the heat pump host room, and an exhaust damper is installed on the rear wall. The fresh air damper is placed on the upper part of the drying room. The heat pump One end of the host is connected with a drainage system, a temperature sensor is installed inside the heat pump host, and an ambient temperature sensor is installed outside the heat pump host. The drainage system uses drainage pipes to drain water out of the room. The heat pump main unit is connected to the hot air blower with copper pipes. The temperature inside the heat pump main unit is collected by a temperature sensor signal. The ambient temperature outside the heat pump main unit is collected by an outdoor temperature sensor signal. Input the intelligent controller to control the opening or closing of the exhaust fan and the exhaust damper. The outer walls of the drying chamber, the return air duct and the heat pump main room are all made of thermal insulation materials with good thermal insulation properties, such as polyurethane insulation boards, rock wool insulation boards, etc. The heat pump host includes a compressor, an expansion valve, an evaporator, heat pump pipelines and other cooling accessories.

The invention has the following effects: the technical solution uses the heat pump principle to dry noodles, energy saving and environmental protection, and achieves the purpose of energy saving by recovering the hot and humid air discharged from the heat pump drying equipment.

Description of drawings:

Fig. 1 is a schematic structural diagram of the present invention; Fig. 2 is a side view of Fig. 1; Fig. 3 is a schematic diagram of the working state when the outdoor temperature is higher than the temperature in the heat pump main room; Fig. 4 is a working state when the outdoor temperature is lower than the temperature in the heat pump main room schematic diagram.

Drawing description: 1. Vermicelli conveying line, 2. Drying chamber, 3. Fresh air damper, 4. Exhaust fan, 5. Heat pump host room, 6. Temperature sensor, 7. Heat blower, 8. Heat pump host, 9. Copper pipe, 10. Outdoor temperature sensor, 11. Exhaust damper, 12. Return air duct, 13. Ceiling fan, 14. Dehumidification system, 15. Dehumidification damper, 16. Dehumidification duct, 17. Dehumidification fan , 18, circulation fan, 19, condenser.

detailed description:

The embodiment is described in detail in conjunction with the above drawings, as shown in Figure 1 and Figure 2, the drying equipment is mainly composed of a drying chamber 2, a noodle conveying line 1, a hot air blower 7, a dehumidification system 14, a heat pump host 8, and a heat pump host room 5 , fresh air damper 3 and drainage system 12, the drying chamber 2 is located at the lower part of the heat pump host chamber 5, one end of the drying chamber is provided with the entrance of the noodle conveying line 1, and the other end is the outlet, and the hot air blower 7 hangs On the top of the drying chamber, the hot air blower 7 includes a heat pump condenser 19 and a circulating fan 18. A ceiling fan 13 is suspended from the top of the drying chamber. The dehumidification system 14 is located at the bottom of the dehumidification chamber. One end of the wet air pipe is placed at the bottom of the drying chamber, and the other end is connected to the inlet of the heat pump host room 5. The inlet of the heat pump host room is equipped with a dehumidifying blower 17, and the outlet of the bottom of the dehumidifying air duct 16 is equipped with a dehumidifying damper 15.

The heat pump host room 5 is located on the upper part of the drying room. The heat pump host room is an insulated and airtight space. In the heat pump host room, at least one or more heat pump hosts 8 are placed. The front side wall of the heat pump host room is equipped with exhaust air. The fan 4 has an exhaust damper 11 installed on the back wall, and the fresh air damper 3 is placed on the upper part of the drying chamber. One end of the heat pump host is connected with a drainage system 12. Specifically, the drainage system uses a drainpipe to discharge water to the outside. The heat pump main engine 8 is connected with the hot air blower 7 with a copper pipe 9 .

The heat pump host room 5 is provided with a temperature sensor 6, and an ambient temperature sensor is installed outside the heat pump host room. The temperature in the heat pump host room is collected by a temperature sensor signal, and the ambient temperature outside the heat pump host unit is collected by an outdoor temperature sensor 10. After the signal is collected, Input the intelligent controller to control the opening or closing of the exhaust fan 4 and the exhaust damper 11, and the intelligent controller can adopt any one of PLC and CPU.

In order to reduce the heat transfer in the system to the outside and reduce heat loss, the heat pump drying equipment is equipped with thermal insulation materials with good thermal insulation performance for the outer walls of the drying chamber 9, the return air duct 12 and the heat pump main engine chamber 3, such as polyurethane insulation boards, Rock wool insulation board, etc.

The heat pump host 4 includes a compressor, an expansion valve, an evaporator, heat pump pipelines and other refrigeration accessories; the heat pump host can make the heat pump system more compact and easy to install and use.

When the equipment is in operation, the noodle conveying line with suspended noodles enters the drying chamber from the entrance of the drying chamber, the condenser 19 in the hot air blower heats the air, and the heated air is sent to the drying chamber by the circulation fan 18 of the hot blower 7 2, the ceiling fan 13 placed on the top of the drying chamber 2 sends the hot air evenly to the noodle conveying line to exchange heat and dry the dried noodles, and the dried vermicelli is sent out by the dried noodle conveying line 1 and the outlet of the drying chamber 2 for drying Room 2; part of the hot and humid air after heat exchange with the dried noodles in the drying room 2 is introduced back into the hot air blower 7 by the circulation fan 18 of the hot air blower 7, and the other part of the hot and humid air is introduced from the dehumidification air pipe 16 through the dehumidification fan 17 The heat pump host room 5, and the outside air is introduced into the drying room 2 by the fresh air damper 3 to supplement fresh air; the hot and humid air introduced into the heat pump host room 8 contains a large amount of steam latent heat and high-temperature sensible heat, and is absorbed by the evaporator of the heat pump system after entering the host room. Repeated absorption and utilization, the heat absorbed by the evaporator is transferred to the condenser 19 placed in the hot air blower 7 through the refrigerant through the connecting copper pipe 9, and then introduced into the drying chamber 2 by the circulation fan 18 of the hot air blower 7, and the condensed water is discharged from the drainage system 12 Drain out of the heat pump host room 5.

The heat pump host room 5 is provided with a host room temperature sensor 6, and the heat pump host room is equipped with an ambient temperature sensor 10; the host room temperature sensor 6 and the ambient temperature sensor 10 intelligently control the exhaust fan 4 and the exhaust damper 11 on or off.

Its control logic is:

a. When the temperature in the host room is lower than the ambient temperature, the exhaust damper 11 and the exhaust fan 4 are opened, and the outdoor air is introduced into the heat pump host room by the exhaust fan through the exhaust damper, and is discharged out of the heat pump host after exchanging the cooling capacity of the heat pump host outdoor.

b. When the temperature of the host room is not lower than the ambient temperature, the exhaust damper 11 is closed, and the heat pump host absorbs the air in the host room. Inhaled and utilized by the heat pump host;

c. When the temperature of the host room is higher than 40°C (the specific temperature value can be adjusted according to different situations), the exhaust damper 11 and the exhaust damper will be opened to force the overheated air out of the host room to prevent the current of the heat pump host from being too high.

Claims (4)

1. null1. a pump type heat fine dried noodles drying equipment，It includes drying chamber，It is characterized in that: drying chamber is positioned at the bottom of heat pump machine hall，One end of drying chamber is provided with the entrance of fine dried noodles pipeline，Its other end is outlet，Described hot-air blower hangs on the top of drying chamber，Hot-air blower includes condenser and the circulating fan of heat pump，The top suspension of drying chamber has ceiling fan，Described dehumidification system is positioned at the bottom of drying chamber，Dehumidification system is placed in the bottom of drying chamber by dehumidifying airduct one end，The other end connects the import of heat pump machine hall，The import of heat pump machine hall is equipped with wet-emitting blower，The exit of the bottom of dehumidifying airduct is equipped with dehumidifying air door，Heat pump machine hall is positioned at the top of drying chamber，A heat pump main frame is at least put in heat pump machine hall，Equipped with exhaust fan on the front side wall of heat pump machine hall，Equipped with air draft air door in back side wall，New wind air door is placed in the top of drying chamber，One end of described heat pump main frame is connected with drainage system，It is provided with temperature sensor in described heat pump machine hall，Heat pump machine hall is externally provided with environment temperature sensor.
2. 2. a kind of pump type heat fine dried noodles drying equipment according to claim 1, it is characterized in that: drainage system is by outside water discharge chamber with drain pipe, described heat pump main frame is connected with hot-air blower copper pipe, temperature in heat pump machine hall has temperature sensor signal collection, ambient temperature outside heat pump machine hall by outdoor temperature sensor signals collecting, inputs intelligent controller and controls being turned on and off of exhaust fan and air draft air door after signals collecting.
3. 3. a kind of pump type heat fine dried noodles drying equipment according to claim 1, it is characterised in that: the outer wall of drying chamber, return airway and heat pump machine hall all selects the good insulation material of heat-insulating property, such as polyurethane thermal insulation board, rock-wool heat insulation plate etc..
4. 4. a kind of pump type heat fine dried noodles drying equipment according to claim 1 or 3, it is characterised in that: comprise compressor, expansion valve, vaporizer, heat pump circuits and other refrigeration accessories in described heat pump main frame.