CN206333267U - A kind of heat pump noodle drying device utilized with backheat - Google Patents

Abstract

The utility model discloses a heat pump dried noodle drying device with heat recovery utilization, which comprises a drying room, an evaporation room and a heat pump system. The drying room is provided with a noodle conveying line; Above the noodle conveying line; the evaporators in the heat pump system are arranged side by side at intervals in the evaporation chamber, one end of the evaporation chamber is the air inlet pipe for the exhaust air and the other end is the air outlet end, and the air outlet end of the evaporation chamber is connected with The air outlet pipe, the air outlet pipe and/or the air inlet pipe are provided with fans; the adjacent evaporation chambers are provided with cavity sections, and the cavity sections are provided with air valves, and the side walls of some cavity sections are also connected with A fan; a ceiling fan is installed between the condenser and the noodle conveying line; a moisture exhaust air duct is provided under the vermicelli conveying line, and the moisture exhaust air duct is connected with the evaporation chamber; the side wall of the barn is equipped with an air inlet for the barn. The utility model has the advantages of high heat recovery utilization rate, high energy efficiency ratio, high thermal efficiency, simple and compact structure, small occupied space, and is suitable for new projects and renovation of old barns.

Description

A heat pump dried noodle drying device with heat recovery utilization

technical field

The utility model relates to the technical field of drying, in particular to a dried noodle drying device.

Background technique

Currently known noodle drying equipment mainly uses coal and natural gas as fuels to provide heat sources, and the smoke generated by fuel combustion (especially coal) is rich in pollutants such as carbon monoxide and carbon dioxide, polluting the environment. With the promulgation of various policies related to the prohibition of combustion, fuel-based drying equipment will gradually be banned, and more energy-saving and environmentally friendly heat pump drying technology will gradually enter the field of dried noodle drying.

At present, air-source heat pumps have been used for dry noodles with heat pumps, which send heat into the barn, and the tidal air is directly discharged in the form of waste gas, or simply used for heat recovery, and the utilization rate of waste heat is very low, which results in a large amount of energy. When the ambient temperature is low, the air source heat pump is greatly affected by the ambient temperature, and the energy efficiency is relatively low, 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 the high-temperature dry air 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; therefore, when the airflow humidity reaches the set humidity target, a part of the hot and humid air in the drying room needs to be discharged. Dry air from the environment is introduced to continue the dehydration drying process. At present, heat pump equipment is limited by the characteristics of heat pumps. In low ambient temperatures, heat pump heating capacity and energy efficiency ratio are relatively low, which limits its application in cold regions (such as Northeast China). The material drying process is not affected by seasons and ambient temperature, and drying operations are required throughout the year. Therefore, when selecting heat pumps, it is often necessary to match them according to the heat load at low ambient temperatures. At this time, the selection of heat pump equipment will be very large. , This not only increases the initial investment of drying equipment, but also the energy efficiency of heat pump drying equipment is relatively low at low ambient temperature, and the advantage of energy saving is greatly weakened, and when the ambient temperature is high, the utilization rate of heat pump equipment is very low.

At present, the known heat pump drying device with simple structure uses the heat pump heat exchanger (condenser) to directly heat the air in the barn as the drying medium, and uses the ambient air around the heat pump host as the heat source for absorption, which is the so-called ambient air source heat pump. . Even if there is heat recovery utilization of the tidal wind, the tidal wind is guided to the vicinity of the heat pump host, so that the evaporator of the heat pump performs single-stage one-time heat exchange, and the heat recovery is very limited. Moreover, a single-stage evaporator is used to recover the heat of the exhaust gas. When the temperature of the exhaust gas is high, it only passes through the evaporator once to cool down. It is difficult to recover the latent heat in the humid air, and most of the heat is discharged, which still causes heat waste.

Utility model content

The purpose of the utility model is to provide a heat pump type dry noodle drying device with a simple structure, which is relatively simple and compact, suitable for new construction projects and renovation of old barns, with low cost and high energy efficiency.

In order to achieve the above purpose, a heat pump dried noodle drying device with heat recovery utilization of the utility model includes a barn, an evaporation room and a heat pump system, and is characterized in that: the barn is equipped with a noodle conveying line for hanging and transporting vermicelli. The conveying line passes through the barn;

The heat pump system includes a compressor, an expansion valve, an evaporator, and a condenser connected through a refrigerant pipeline cycle. There are two or more sets of heat pump systems; the condensers in each heat pump system are located in the barn and along the noodle conveying line. The evaporators in each heat pump system are arranged side by side and spaced apart in the evaporation chamber, and one end of the evaporation chamber is the tidal air inlet pipe and the other end is the air outlet. , the air outlet end of the evaporation chamber is connected with an air outlet pipe;

Between each condenser and the vermicelli conveying line, there is a fan with the air outlet direction facing the vermicelli conveying line; below the vermicelli conveying line, there is a moisture exhaust air duct along the length direction of the vermicelli conveying line, and the moisture exhaust air duct is spaced apart along the length direction of the vermicelli conveying line. There is a tidal exhaust air outlet, and the tidal exhaust air duct extends out of the barn and communicates with the air inlet duct of the evaporation chamber; the side wall of the barn is provided with an air inlet of the barn that communicates with the outside air, an air outlet pipe and/or An exhaust fan is arranged in the tidal exhaust duct.

Taking the airflow direction as the forward direction, the evaporation chambers behind and in front of each evaporator are provided with cavity sections; taking the airflow direction as the forward direction, the evaporation chambers are provided with N evaporators and N+1 The cavity segments mentioned above, N is a natural number; from front to back, the front cavity segment is the first cavity segment, and the second to Nth cavity segments are in turn backward; from front to back Starting from the third cavity section, the side walls of the third cavity section and all odd-numbered cavity sections thereafter are connected with start-up fans, and the air inlets of each start-up fan are provided with a connection between the start-up fan and the air inlet. The first air valve of the cavity section; from the front to the back of the second cavity section, the second cavity section and all subsequent even-numbered cavity sections are provided with the first damper connecting the cavity section and the atmosphere. Second damper.

Sensors for monitoring temperature and humidity are installed in the barn; the bottom of the evaporation chamber is connected with a condensed water collecting and draining pipe.

The peripheral outer wall of each evaporator is connected with the inner wall of the evaporation chamber to form a closed cavity.

The utility model has the following advantages:

In the utility model, the evaporators of the multi-stage heat pump system are arranged side by side in the evaporation chamber at intervals, so that they are arranged in series on the air path of the hot air. When the drying system of the barn is in a stable working state, the tidal wind in the tidal air passage passes through them step by step. The evaporators at all levels reduce the temperature of the return tidal air step by step, making it cool to a saturated state and condense into water, and the exhaust tidal air realizes low-temperature discharge. During this process, the sensible heat and latent heat of water vapor in the exhaust tidal wind are absorbed and utilized to the maximum extent by the heat pump evaporator. At the same time, due to the relatively stable temperature and humidity of the tidal exhaust wind, it is not affected by the seasonal changes of the external environment, which improves the COP of the heat pump system and ensures the efficient and stable operation of the heat pump system. energy, protect the environment.

When the noodle barn drying system starts to operate, there is no dehumidifying air at this time, and the heat pump system can only start by absorbing the heat of the surrounding air to heat up the barn. However, if the heat pump multi-stage evaporator air path is still connected in series, it will cause frosting on the evaporator—decrease in air volume—reduction in efficiency of the heat pump system—frosting—reduction in air volume—reduction in efficiency In a vicious cycle, until the heat pump system fails to work.

In order to break the above-mentioned vicious cycle, the utility model adopts the method of adding a start-up fan and air valve, together with a reasonable electrical control program, so that the heat pump system can well complete the start-up task of the dried noodle barn drying system. When the temperature of the drying room rises to the set target value, the wet vermicelli starts to enter the room, and when it reaches the set position, the drying system of the drying room for dried noodles starts to dehumidify, and then the heat pump system automatically stops the starting mode and turns into the normal drying mode at the same time.

The starting mode of the heat pump system is as follows: After starting up, firstly open all air valves, then start the starting fan, exhaust fan and heat pump system, the ambient air enters the evaporator room along the air valve, and is driven by the fan only through the primary evaporator. For the air path, the evaporator is in a parallel state, which improves the working condition of the evaporator, prevents the evaporation temperature from being too low, and enables the heat pump system to complete the start-up work smoothly.

At present, heat pump equipment is limited by the characteristics of heat pumps. In low ambient temperatures, heat pump heating capacity and energy efficiency ratio are relatively low, which limits its application in cold regions (such as Northeast China). The utility model only uses ambient gas when it is initially started, and uses high-temperature humid air all the time during normal operation. Therefore, during normal operation, the ambient temperature has little influence on the operating efficiency of the heat pump system in the utility model, making the utility model Compared with the normal heat pump system, it has wider adaptability, can maintain a high energy efficiency ratio in colder regions, and has a wide range of environmental adaptability.

The heating method of the heat pump system of the utility model is more direct, and the structure is simpler, and it is very suitable under the condition that the spatial position of the barn is satisfied, especially suitable for new construction projects.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic diagram of the principle of the heat pump system in the present invention.

detailed description

The direction indicated by the arrow in FIG. 1 is the direction of the air flow at this location; the direction indicated by the arrow in FIG. 2 is the flow direction of the refrigerant at this location.

As shown in Fig. 1 and Fig. 2, the heat pump type dried noodle drying device of the present invention comprises a barn 1, an evaporator room 2 and the heat pump system shown in Fig. 2, and the bottom of the barn 1 is provided with a noodle conveying line for hanging and transporting vermicelli. 3. The noodle conveying line 3 passes through the barn 1 .

As shown in Fig. 2, the heat pump system includes a compressor 14, an expansion valve 15, an evaporator 16, and a condenser 17 connected in circulation through a refrigerant pipeline 18, and the heat pump system is provided with two or more sets; the condensers 17 in the heat pump systems at all levels are all Located in the barn 1 and arranged side by side and above the dried noodle conveying line 3 along the length direction of the dried noodle conveying line 3; the evaporators 16 in each heat pump system are all arranged side by side and spaced in the evaporation chamber 2, and the evaporation chamber One end of 2 is the air inlet end and the other end is the air outlet end, and the air outlet end of the evaporation chamber 2 is connected with an air outlet pipe 4 .

Each condenser 17 is provided with a ceiling fan 6, and the suspension handle of the ceiling fan 6 passes upward through the condenser 17 and is connected to the top wall of the barn 1; On the road 7, along the length direction of the noodle conveying line 3, there are tidal discharge air outlets 8 at intervals, and the moisture discharge air passage 7 extends out of the barn 1 and communicates with the air inlet end of the evaporation chamber 2; the top wall or side of the barn 1 The wall is provided with the air inlet of the barn that communicates with the outside air. The air outlet pipe 4 and/or are provided with an exhaust fan 5; it is a conventional technology to set the air inlet on the building, and the air inlet of the barn is not shown in the figure.

With the airflow direction as the forward direction, the evaporators 16 at all levels are provided with cavity sections 9 at the front and back; the evaporation chamber 2 is provided with N evaporators 16 and N+1 cavity sections 9 at intervals from front to back. , N is a natural number; from front to back, the frontmost cavity segment 9 is the first cavity segment 9, and backwards are the second to Nth cavity segment 9; from front to back, the third Cavity section 9 begins, and the side wall of the third cavity section 9 and all odd-numbered cavity sections 9 thereafter is all equipped with a starting fan 10 and connects the starting fan and the first air valve 11 of the cavity section, except the first Outside the last cavity section 9, the two side walls of each cavity section 9 are equipped with a second air valve 12 communicating with the cavity section and the atmosphere.

The barn is equipped with a sensor for monitoring air temperature and humidity. The sensor is connected with an electric control device. The electric control device can be a PLC or a single-chip microcomputer. The temperature sensor and the electric control device are both prior art, not shown in the figure.

The bottom of the evaporation chamber 2 is equipped with a condensed water collecting and draining pipe 13 . It can discharge the condensed water condensed at the evaporator 16 by the hot and humid air (humid exhaust air) during work.

The circumferential outer walls of each evaporator 16 are connected to the inner wall of the evaporation chamber 2 , so as to prevent the airflow from bypassing the evaporator 16 .

Wherein, the noodle conveying line 3, the ceiling fan 6, the components of the heat pump system, the starting fan 5 and the exhaust fan 10 etc. are all prior art, and the specific structure will not be described in detail.

The starting mode of the heat pump system is as follows: first open the first air valve 11 and each second air valve 12, then open the exhaust fan 5 and the starting fan 10, then open each fan 6, and open the corresponding number of heat pump systems according to the actual workload ; At this time, the outside air at each second air valve 12 is sucked into the cavity section 9 by the second air valve 12 to form an air flow, and the air flow in the cavity section 9 flows to both sides and passes through an evaporator 16 respectively , and then discharged through the starting fan 10 or the exhaust fan 5; the heat pump evaporator absorbs the heat in the outside air, and transfers it to the condenser 17 through the refrigerant of the heat pump system, and the heat is blown by the airflow of the condenser fan to heat the air in the barn And form hot blast, hot blast is under the effect of ceiling fan 6 downward wind pressure, forms the hot blast that flows down and blows to vermicelli conveying line 3. During this process, the heat pump system absorbs the heat in the outside air and transfers it to the oven 1, so that the oven 1 is heated up to the set temperature.

In the later stage of the start-up phase, the wet noodles begin to enter the drying room 1, and the hot air heats and dries the dried noodles suspended on the noodle conveying line 3. The moisture evaporated from the dried noodles will be closed when the temperature and humidity in the drying room 1 reach the set value. Damper 11, damper 12 and start-up fan 10, under the negative pressure of barn dehumidification blower and exhaust fan 5, the moist air in barn 1 enters the damp air duct 7 through the tide outlet 8 to form a drain. The wet wind flows and enters the evaporator chamber 2. At this point, the start-up mode of the heat pump system ends, and at the same time enters into a normal working mode.

The normal working mode is as follows: in the drying room, while the drying room 1 is dehumidifying, the low-temperature and dry outside air is replenished into the drying room 1 through the air inlet of the drying room, and the hot air emitted by the condenser 17 of the heat pump system is continuously supplied to the drying room 1. Provide heat to maintain the temperature and humidity in the drying room 1 at the set value required by the drying process. Under the action of the downward wind pressure of the ceiling fan 6, the hot air forms downward flowing hot air and blows to the dried noodles suspended on the noodle conveying line 3, and the dried noodles are continuously heated while evaporating moisture, and the humidity exhaust fan and the exhaust fan 5 in the barn Under the action of suction, hot and humid air enters the moisture exhaust duct 7 through the tide outlet 8 to form a moisture exhaust air flow, and then enters the evaporator chamber 2. At the same time, the external low temperature and dry air enters the oven 1 through the air inlet of the oven. . In the evaporation chamber 2, the dehumidified air passes through the evaporator 16 step by step and is discharged into the environment by the exhaust fan 5. During this process, the heat pump system runs through the compressor 14, and the system refrigerant passes through the expansion valve 15 in the evaporator 16. The medium evaporation absorbs heat to cool the dehumidification air step by step, and at the same time, the water vapor is condensed into water, and the heat pump system absorbs most of the sensible heat and latent heat in the dehumidification air. Also under the action of the compressor 14 , the refrigerant generates high pressure in the condenser 17 and changes from a gaseous state to a liquid state, and releases the heat it absorbs from the dehumidifying air into the barn 1 through the condenser 17 . The heat pump system maintains the stable operation of the noodle drying system through waste heat recovery and self-generated heat.

According to the temperature and humidity of the external environment under different weather conditions, and based on the energy-saving and high-efficiency principle of the heat pump system, the utility model can also perform normal drying operation only in the start-up mode.

There is no chemical combustion process in the operation of the utility model, and each device in the utility model, whether it is the heat pump system (compressor 14), the fan 6 or the exhaust fan 5 and the starting fan 10, is all driven by electric power, so the utility model The new type of operation will not pollute the environment.

The utility model uses a heat pump system as a heat source, which can absorb heat or regenerate heat through the evaporator 16, and transfer heat to the drying medium through the condenser 17 to dry the noodles in the barn 1, compared with coal or gas heating air. The method is more energy-saving and environmentally friendly; compared with ordinary heat pump systems, it can fully utilize the energy of waste heat, which greatly improves the efficiency of the heat pump system and achieves the purpose of saving energy.

The utility model recycles the waste heat (heat) in the dehumidification air to the greatest extent, improves the working condition of the evaporator 16, improves the energy efficiency ratio of the heat pump system, has a very obvious effect of saving energy and reducing consumption, and reduces The operating cost of the heat pump system.

The fresh air reduces the humidity in the barn 1. With the utility model, dried noodles can be quickly dried by the heated fresh air. At the same time, the heat pump system is very energy-saving, so that the utility model has the function of rapidly drying dried noodles and energy saving and consumption reduction. The advantages of pollution, has a good prospect of popularization and application.

The above embodiments are only used to illustrate and not limit the technical solutions of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present utility model can still be modified or equivalently replaced. Any modification or partial replacement without departing from the spirit and scope of the present invention shall be included in the claims of the present invention.

Claims (4)

1. a kind of heat pump noodle drying device utilized with backheat, including barn, vaporization chamber and heat pump, its feature exist In：The vermicelli pipeline for being used for hanging and convey vermicelli is provided with inside barn, vermicelli pipeline passes through the barn；

Heat pump includes compressor, expansion valve, evaporator and the condenser that connection is circulated by refrigerant line, heat pump Provided with two sets and more than；Condenser in each heat pump in barn and along vermicelli pipeline length direction side by side between Every the top located at the vermicelli pipeline；The equal spacing side by side of evaporator in each heat pump steams in the vaporization chamber The one end for sending out room is humidity discharging wind blast pipe and the other end is outlet air end, and the air-out end of vaporization chamber is connected with discharge pipe；

An air-out direction is equipped between each condenser and vermicelli pipeline towards the fan of vermicelli pipeline；Vermicelli pipeline Lower section is provided with humidity discharging air channel, humidity discharging air channel to be spaced apart along the length direction of vermicelli pipeline along its length is provided with humidity discharging wind Mouthful, humidity discharging air channel is stretched out barn and is connected with the air intake airduct of the vaporization chamber；Barn side wall is provided with and communicated with outside air Barn air inlet, exhaust fan is provided with discharge pipe and/or humidity discharging air channel.

2. a kind of heat pump noodle drying device utilized with backheat according to claim 1, it is characterised in that：

Using airflow direction to be preceding to the vaporization chamber at each evaporator rear and front is equipped with cavity segment；Direction using air-flow is before To the vaporization chamber is interval with N number of evaporator and N+1 described cavity segments from front to back, and N is natural number；By it is preceding extremely Afterwards, the cavity segment of forefront is first cavity segment, and second is followed successively by backward to n-th cavity segment；From the from front to back the 3rd Individual cavity segment starts, the 3rd cavity segment with and subsequent the side walls of cavity segment of all odd bits be respectively connected with startup blower fan, Each air inlet for starting blower fan is equipped with connection and starts blower fan and the first air-valve of cavity segment；From second cavity from front to back Section start, second cavity segment with and subsequent the cavity segment of all even bits on be equipped with connection cavity segment and air second Air-valve.

3. a kind of heat pump noodle drying device utilized with backheat according to claim 1, it is characterised in that：

The sensor for being used for monitoring humiture is provided with barn；The bottom of the vaporization chamber is connected with condensate integrate draining pipe.

4. a kind of heat pump noodle drying device utilized with backheat according to claim 1, it is characterised in that：It is described each The peripheral outer wall of evaporator connects into closed cavity with the inwall of vaporization chamber.