CN103202520B - Edible fungus dried air circulation treatment device - Google Patents

Abstract

The invention discloses an edible fungus drying air circulation treatment device, which comprises a baking room, an air handling unit, an air supply main pipe, an air mixing device, an air supply orifice plate and a return air orifice plate arranged in parallel in the baking room. The air orifice plate and the return air orifice divide the baking room into air supply static pressure space, return air static pressure space and baking workshop; the air handling unit is composed of air inlet, solid adsorption dehumidification device, heat pump circuit, fan , auxiliary electric heating and air outlet, wherein the heat pump circuit is composed of a condenser and three sets of parallel compressors and evaporator assemblies, and the compressor and evaporator assemblies include expansion valves, evaporators and compressors connected in sequence. The present invention adopts the way of parallel air supply and the total-separate-total-separated refrigerant distribution mode to improve the airflow organization and ensure the uniformity and stability of the air flow and temperature field in the baking room during operation, thereby ensuring the consistency of the baking effect. At the same time, it also reduces the energy consumption of the baking room during low-load operation.

Description

An edible fungus drying air circulation treatment device

technical field

The invention belongs to the technical field of building environment and equipment engineering, and relates to an air circulation treatment system, in particular to an air circulation treatment system for drying edible fungi.

Background technique

The baking room is widely used in the drying and preservation of agricultural surplus products and the processing of flavored food. At present, most of the drying rooms are hot air convection drying equipment heated by flue gas, and the heating method is mostly one furnace and one chimney tempering heating type drying room. This kind of traditional baking room has simple equipment, low initial investment, and is still used in rural areas. However, there are still a series of problems such as low baking efficiency, poor quality of dried food, complicated baking operation and environmental pollution.

In order to solve a series of problems caused by the traditional baking room, after long-term unremitting efforts, researchers have proposed a variety of different traditional baking room transformation technologies and new baking technologies to improve the baking quality and efficiency, especially the heat pump The introduction of technology and the utilization of clean new energy sources such as solar energy have greatly promoted the development of baking technology. Utility Model Patent (Application No.: 2012206509863) A mushroom house drying device coupled with air source heat pump and solar heating (see Figure 1). Reduce environmental pollution and energy consumption, while greatly reducing labor costs. However, the temperature and humidity of the air supply and the air distribution are uneven, which greatly affects the baking quality. The specific performance is that the baking effect in the middle of the baking chamber is good, and the baking quality around the room is poor.

The utility model patent CN 201976709 U edible fungus drying equipment (see Figure 2) adopts multiple airflow channels to organize the air supply air flow, that is, the baking chamber is divided into multiple vertical channels equally, and a blower fan is installed above each channel. This structure improves the temperature and humidity of the air supply and airflow organization in a single airflow channel to a certain extent, thereby ensuring that the baking quality is relatively consistent. However, structurally, it is difficult to ensure that the air distribution between each air flow channel is uniform, resulting in differences in drying quality between each air flow channel. In addition, the use of multiple fans to supply air will increase the operating energy consumption, which is contrary to the purpose of energy saving and emission reduction.

In addition, it is worth noting that it is difficult to completely solve the problem of uneven air supply temperature, humidity and air distribution only by improving the air supply structure of the baking room. A good air flow organization depends on the air handling performance of the air handling unit. Only by improving the performance of the air handling unit can the uniformity of the air flow after treatment be fundamentally realized. The heat exchanger in the air handling unit of the existing large-scale baking room adopts the method of parallel combination of multiple sets of independent heat pump system heat exchange coils on the air side. The disadvantages of this parallel mode are: (1) When the air handling unit is running at low load, only part of the heat pump system is running, and the temperature and humidity of the treated air are not uniform at this time. (2) When the air handling unit is running at low load, only a part of the heat exchange coil can be used, and the utilization rate of the heat exchange coil is very low. (3) Since multiple systems operate independently, the uniformity of the treated air cannot be guaranteed, especially when the air entering the air handling unit is uneven, it is difficult for multiple systems to coordinate effectively, and the unevenness of the treated air will further increase.

Contents of the invention

Technical problem: Aiming at the defects existing in the prior art, the present invention provides an edible fungus drying air circulation treatment device, which can effectively improve the uniformity of air temperature and humidity after treatment, and improve the airflow organization form, thereby ensuring The baking effect is consistent, and it also reduces the energy consumption of the baking room during low-load operation. In addition, compared with the traditional baking room, the system has less environmental pollution, more convenient operation, high baking efficiency and good drying quality.

Technical solution: The edible fungus drying air circulation processing device of the present invention includes a baking chamber, an air handling unit, an air supply main pipe, an air mixing device, an air supply orifice and a return air orifice arranged in parallel in the baking chamber, and the air supply The orifice plate and the air return orifice plate divide the baking room into three areas, which are the air supply static pressure space and the return air static pressure space on both sides, and the baking workshop in the middle; the air handling unit is located in the return air static pressure space. Outside the space, the air handling unit communicates with the air supply static pressure space through the air supply main pipe, and the air mixing device is arranged in the air supply main pipe pipeline.

The air handling unit is composed of an air inlet, a solid adsorption dehumidification device, a heat pump circuit, a fan, an auxiliary electric heater and an air outlet arranged in sequence along the direction of air flow.

The heat pump circuit includes a condenser and three sets of compressors and evaporator assemblies arranged in parallel. The compressor and evaporator assemblies include sequentially connected expansion valves, evaporators, and compressors. The expansion valves in the three sets of compressors and evaporator assemblies are The refrigerant inlets of the valve are respectively connected with the refrigerant outlets of the condenser, and the refrigerant outlets of the compressor are respectively connected with the refrigerant inlets of the condenser.

The condenser includes a gas collecting and mixing device, a serpentine tube bundle and a liquid collecting and mixing device connected in sequence. The gas-collecting mixing device includes a gas-collecting inner pipe and a gas-collecting outer pipe sleeved outside the gas-collecting inner pipe. The gap between the gas-collecting inner pipe and the gas-collecting outer pipe is the gas-collecting static pressure layer. The three refrigerant inlets are the refrigerant inlets of the condenser, and the three refrigerant inlets of the gas-collecting inner pipe are respectively connected with the compressors in the three sets of compressors and the evaporator assembly, and the gas-collecting outer pipe and the serpentine tube bundle import connection.

The liquid collection mixing device includes a liquid collection inner pipe and a liquid collection outer pipe sleeved outside the liquid collection inner pipe. The gap between the liquid collection inner pipe and the liquid collection outer pipe is a liquid collection static pressure layer. The liquid collection inner pipe and the serpentine The outlet of the tube bundle is connected. The three refrigerant outlets set on the liquid collecting outer tube are the refrigerant outlets of the condenser. The three refrigerant outlets of the liquid collecting outer The valves are connected accordingly.

In the present invention, exhaust holes communicating with the static pressure layer of the gas collection are evenly distributed on the pipe wall of the gas collection inner pipe, and liquid discharge holes connected with the static pressure layer of the liquid collection are evenly distributed on the pipe wall of the liquid collection inner pipe mouth.

In the present invention, the gas-collecting and mixing device adopts a double-layer structure of an inner tube and an outer tube sleeved outside the inner tube. The gap between the inner tube and the outer tube is a static pressure layer, and the static pressure layer is used to fully mix and stabilize the gaseous refrigerant. Pressure effect, the ratio d _w /d _n of the inner diameter d _w of the outer tube to the outer diameter d _n of the inner tube should be 2.5 to 3.5. When the ratio is small, the mixing and voltage stabilizing effect is poor, and the resistance is large; when the ratio is too large, the improvement of mixing and pressure stabilizing effect is reduced, the metal consumption is large, and the economy is poor. The exhaust orifices are evenly arranged in the inner pipe, so that the gaseous refrigerant can be evenly diffused from the inner pipe of the gas collection and mixing device to the static pressure layer. In order to improve the uniformity of diffusion and reduce the diffusion resistance, the diameter of the exhaust orifice should be 1/3 of the inner tube diameter of the mixing device. The inner pipe of the gas collection and mixing device is connected to the three gaseous refrigerant inlets through capillary tubes. In order to reduce the influence of the two ends of the inner pipe of the gas collection and mixing device on the airflow organization and the mutual influence between the capillaries, the capillaries on both sides are connected to the inner pipe of the gas collection and mixing device. The distance between the two ends should be 5 times the diameter of the inner tube, that is, 5d _n , and the distance between two adjacent capillaries should be 2d _n ~ 3d _n .

In the present invention, the liquid collection and mixing device also adopts the structure of inner and outer double-layer tubes, the gap between the inner tube and the outer tube is a static pressure layer, and the static pressure layer plays the role of fully mixing the liquid refrigerant _. The outer diameter d _n ratio d _w /d _n should be between 1.5 and 2.5. When the ratio is small, the mixing effect is poor, and the resistance is large; when the ratio is too large, the improvement of the mixing effect is reduced, the metal consumption is large, and the economy is poor. The inner pipe is evenly arranged to discharge orifices, so that the liquid refrigerant can evenly flow from the inner pipe of the liquid collection and mixing device to the static pressure layer. In order to improve the flow uniformity and reduce the flow resistance, the diameter of the liquid discharge orifice should be 1/2 of the inner tube diameter of the mixing device. The inner tube of the liquid collection and mixing device is connected through the outlet of the capillary condenser. In order to improve the uniformity of mixing and reduce the mutual influence between the two ends of the inner tube of the liquid collection and mixing device and the capillary, the distance between the capillary on both sides and the two ends of the inner tube of the liquid collection and mixing device It should be twice the diameter of the inner tube, that is, 2d _n , and the distance between two adjacent capillaries should be 0.5d _n to 1.5d _n .

In the present invention, the solid adsorption dehumidification device can be used for multiple purposes, and a set of devices can be used continuously for two weeks under normal conditions. It can automatically alarm when the adsorption is saturated, and can be regenerated after being exposed to sunlight after saturation.

When the air treatment device in the edible mushroom baking room is running, the air side circulation is as follows: the humid air after drying the edible fungus is collected in the return air static pressure space and enters the air handling unit from the air inlet. After the temperature drops and the temperature rises, a certain drying capacity is restored, and it is sucked by the fan into the air supply main pipe; after the dry air is further mixed in the air supply main pipe through the air mixing device, it enters the air supply static pressure space through the air supply main pipe, and in it Fully mixed, the temperature and humidity field is relatively uniform; after that, the dry air enters the baking workshop through the air supply orifice, passes through it at a certain flow rate and takes away the surface moisture of the edible fungi, and gradually dries the edible fungi; the dried air When the humidity increases and the temperature drops, it returns to the return air static pressure space through the return air orifice, thus completing the circulation of the air side of the baking room.

In the air handling unit, the humid air enters from the air inlet, and after being dehumidified by the solid adsorption dehumidification device, it enters the condenser, and flows out after the heat exchange between the surface of the condenser and the hot refrigerant in the condenser fully heats up. In winter or under extreme working conditions When the preset temperature cannot be reached, the auxiliary electric heating can be used to assist heating, and then the dry air with a certain temperature will be sucked by the fan and flow out of the air handling unit through the air outlet. The heat pump circuit cycle of the air handling unit is as follows: the gaseous refrigerant enters the inner pipe of the gas collection and mixing device through three gaseous refrigerant inlets; The static pressure layer of the mixing device; the gaseous refrigerant is fully mixed in the static pressure layer of the gas collecting and mixing device; the gaseous refrigerant enters the serpentine tube bundle through the outer tube of the gas collecting and mixing device; the gaseous refrigerant liquefies and releases heat in the serpentine tube bundle into a liquid state; the liquid refrigerant enters the inner tube of the liquid collecting and mixing device from the serpentine tube bundle; the liquid refrigerant flows into the static pressure layer of the liquid collecting and mixing device from the liquid discharge orifices evenly distributed on the inner tube of the liquid collecting and mixing device; The liquid refrigerant in the static pressure layer of the mixing device is fully mixed; the liquid refrigerant enters the expansion valves of the three sets of compressors and evaporator assemblies respectively through the three liquid refrigerant outlets on the outer pipe of the liquid collecting and mixing device; In the evaporator assembly, the liquid refrigerant enters the evaporator through the expansion valve. In the evaporator, the liquid refrigerant absorbs heat and changes from a liquid state to a gaseous state. The gaseous refrigerant enters the gaseous refrigerant inlet through the compressor to complete the cycle.

The condenser of the present invention is respectively equipped with a gas collection mixing device and a liquid collection mixing device at the inlet and outlet of the serpentine tube bundle to realize the exchange of refrigerants between the three sets of compressors and the evaporator assembly, and only energy exchange can be realized in the existing condenser Based on the exchange of working fluid, the utilization efficiency of the condenser is improved, the heat exchange efficiency is improved, the heat unevenness between the refrigeration working fluids caused by uneven treatment is reduced, and the output range and processing capacity of the air handling unit are improved. Improved uniformity of air treatment.

The present invention adopts the air supply and return mode of the parallel air supply through the air supply orifice and the parallel return air of the return air orifice, and the air supply orifice side and the return air orifice are respectively equipped with a supply air static pressure space and a return air static pressure space. The pressure space reduces the difference in pressure between the supply and return air orifice plates, thereby ensuring the uniformity of the supply air pressure and the supply air flow. During operation, the dry air enters the baking workshop from the air supply orifice at a certain flow rate, and flows horizontally in it, which has a good air flow organization and is easy to obtain a stable air flow and temperature field distribution. This parallel air supply method is conducive to improving the airflow organization, and can ensure that the air flow and temperature and humidity field in the baking workshop are uniform and stable during operation, that is, the environment of the edible fungus in the baking workshop is consistent, and the drying degree of each part is ensured. Consistent, improve the high-quality rate of the product.

Beneficial effects: Compared with the existing edible fungus drying air circulation treatment device, the present invention has the following advantages:

(1) The present invention adopts the way of sending and returning air through the parallel air supply of the air supply orifice and the parallel return of the air return orifice. The dry air enters the baking workshop from the air supply orifice at a certain flow rate, and the baking work The airflow in the middle flows horizontally, has better airflow organization, and is easy to obtain stable airflow and temperature field distribution, thus creating more suitable conditions for edible fungus drying.

(2) The air supply orifice and the air return orifice of the present invention are respectively equipped with an air supply static pressure space and a return air static pressure space, which can stabilize the airflow entering it and reduce the inhomogeneity of the airflow. The dry air flow from the plate into the baking room flows horizontally, thereby improving the airflow organization and temperature field in the baking room; at the same time, reducing the pressure difference between the air supply and return air orifice plates, so as to ensure the supply air pressure and the supply air flow. Uniformity.

(3) The condenser of the present invention realizes the exchange of the working medium between the refrigerants on the basis that the condenser of the existing air handling unit can only realize the heat exchange between the refrigerant and the air, thereby eliminating the need for three groups of compressors and The difference between the thermodynamic properties of the working fluids during the operation of the evaporator assembly realizes the complementarity of the thermodynamic properties between the refrigeration working fluids, and alleviates the inhomogeneity of the temperature field after the air treatment to a large extent.

(4) The condenser of the present invention is respectively provided with a gas collection mixing device and a liquid collection mixing device at the inlet and outlet of the serpentine tube bundle, and the refrigerant enters and flows out of the condenser through the gas collection mixing device and the liquid collection mixing device respectively to realize the separation of the refrigerant working medium The sufficient mixing between them can eliminate the heat unevenness among the refrigerants.

(5) Both the gas-collecting and mixing device and the liquid-collecting and mixing device of the present invention adopt an inner and outer double-layer pipe structure, and the gap between the inner pipe and the outer pipe is a static pressure layer, which improves the mixing effect of the refrigerant.

(6) The condenser of the present invention significantly improves the heat exchange efficiency. Under the low-load condition where only part of the compressor and the evaporator assembly operate, the entire heat exchange coil can still be fully utilized, thereby improving the utilization efficiency of the condenser and improving the efficiency of the condenser. the heat exchange efficiency.

(7) The air handling unit of the present invention can adjust the output of the compressor and the evaporator assembly in real time according to the load size or control the number of operations of the compressor and the evaporator assembly, thereby expanding the output range of the air handling unit and improving the efficiency of the system. flexibility.

(8) An air mixing device is arranged in the air supply main pipe of the present invention, and the air can be further mixed in the air supply main pipe, which increases the uniformity of the air flow.

(9) The main air supply pipe of the present invention is placed on the top of the baking room, and adopts the interlayer form, which can not only make the space layout reasonable, the structure compact, but also reduce the amount of vortex in the process of air flowing through the main air supply pipe, so that the flow gradually Towards stability.

Description of drawings

Fig. 1 is the principle structural diagram of existing mushroom house drying device;

Fig. 2 is the principle structural diagram of existing edible mushroom drying equipment;

Fig. 3 is the schematic structural diagram of the edible fungus drying air circulation treatment device of the present invention;

Fig. 4 is a principle structural diagram of the parallel connection mode of three groups of compressors and evaporator assemblies of the condenser of the present invention.

In the figure: 1-baking room; 2-air handling unit; 21-air inlet; 22-solid adsorption dehumidification device; 24-auxiliary electric heating; 25-fan; 26-air outlet; 3-air supply main pipe; 4- Air mixing device; 5-air supply orifice; 6-return air orifice; 7-supply static pressure space; 8-return air static pressure space; 9-heat pump circuit; 91-condenser; 911-gas collection mixing device ;911-1-inner tube of gas gathering and mixing device; 911-2-outer tube of gas gathering and mixing device; 911-3-static pressure layer of gas gathering and mixing device; 911-4-exhaust orifice; 912-serpentine tube bundle; 913-liquid collection and mixing device; 913-1-inner tube of liquid collection and mixing device; 913-2-outer tube of liquid collection and mixing device; 913-3-static pressure layer of liquid collection and mixing device; 913-4-drainage orifice; 921-first liquid refrigerant outlet; 922-second liquid refrigerant outlet; 923-third liquid refrigerant outlet; 931-first expansion valve; 932-second expansion valve; 933-third expansion valve; 941- 942-the second evaporator; 943-the third evaporator; 951-the first compressor; 952-the second compressor; 953-the third compressor; 961-the first gas refrigerant inlet; 962 - the second gaseous refrigerant inlet; 963 - the third gaseous refrigerant inlet; 10 - the baking workshop.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

The edible mushroom drying air circulation processing device of the present invention comprises a baking room 1, an air handling unit 2, an air supply main pipe 3, an air mixing device 4, an air supply orifice 5 and a return air orifice arranged in parallel in the baking chamber 6. The air supply orifice 5 and the return air orifice 6 divide the baking chamber into three areas, which are the air supply static pressure space 7 and the return air static pressure space 8 on both sides, and the baking workshop 10 in the middle. The air handling unit 2 is located outside the return air static pressure space 8, the air handling unit 2 communicates with the air supply static pressure space 7 through the air supply main pipe 3, and the air mixing device 4 is arranged in the air supply main pipe 3 pipelines.

The air handling unit 2 is composed of an air inlet 21 , a solid adsorption dehumidification device 22 , a heat pump circuit 9 , a fan 24 , an auxiliary electric heater 25 and an air outlet 26 arranged in sequence along the direction of air flow. The heat pump circuit 9 includes a condenser 91 and three sets of compressors and evaporator assemblies arranged in parallel. The compressor and evaporator assemblies include sequentially connected expansion valves, evaporators, and compressors, and the three sets of compressors and evaporator assemblies The refrigerant inlets of the middle expansion valve are respectively connected to the refrigerant outlets of the condenser 91 , and the refrigerant outlets of the compressor are respectively connected to the refrigerant inlets of the condenser 91 .

The condenser 91 includes a gas collecting and mixing device 911 , a serpentine tube bundle 912 and a liquid collecting and mixing device 913 connected in sequence. The gas-collecting mixing device 911 includes a gas-collecting inner tube 911-1 and a gas-collecting outer tube 911-2 sleeved outside the gas-collecting inner tube 911-1, between the gas-collecting inner tube 911-1 and the gas-collecting outer tube 911-2 The gap is the gas-collecting static pressure layer 911-3, the three refrigerant inlets set on the gas-collecting inner tube 911-1 are the refrigerant inlets of the condenser 91, and the three refrigerant inlets of the gas-collecting inner tube 911-1 They are respectively connected to a compressor and the compressor in the evaporator assembly, and the gas collecting outer pipe 911 - 2 is connected to the inlet of the serpentine tube bundle 912 .

The liquid collection mixing device 913 includes a liquid collection inner pipe 913-1 and a liquid collection outer pipe 913-2 sleeved outside the liquid collection inner pipe 913-1, and the liquid collection inner pipe 913-1 and the liquid collection outer pipe 913-2 The gap in the liquid collection static pressure layer 913-3, the liquid collection inner pipe 913-1 is connected to the outlet of the serpentine tube bundle 912, and the three refrigerant outlets set on the liquid collection outer pipe 913-2 are the cooling of the condenser 91. The three refrigerant outlets of the liquid collecting outer pipe 913-2 are respectively connected to a compressor and an expansion valve in the evaporator assembly. On the pipe wall of the gas-collecting inner pipe 911-2, there are evenly distributed exhaust holes 911-4 connected with the gas-collecting static pressure layer 911-3, and on the pipe wall of the liquid-collecting inner pipe 913-1, there are uniformly distributed vent holes connected with the liquid-collecting layer 911-3. The static pressure layer 913-3 communicates with the drain orifice 913-4.

In a preferred embodiment of the present invention, the gas collection and mixing device 911 adopts a double-layer structure of an inner tube 911-1 and an outer tube 911-2 sleeved outside the inner tube 911-1, and the inner tube 911-1 and the outer tube 911-2 The gap between them is the static pressure layer 911-3, and the static pressure layer 911-3 plays the role of fully mixing the gaseous refrigerant and stabilizing the pressure. The ratio of the inner diameter d _w of the outer tube 911-2 to the outer diameter d _n of the inner tube 911-1 is d _w /d _n should be 2.5 to 3.5. When the ratio is small, the mixing and voltage stabilizing effect is poor, and the resistance is large; when the ratio is too large, the improvement of mixing and pressure stabilizing effect is reduced, the metal consumption is large, and the economy is poor. The inner pipe 911-1 evenly arranges the exhaust holes 911-4, so that the gaseous refrigerant can evenly diffuse from the inner pipe 911-1 of the gas collection and mixing device 911 to the static pressure layer 911-3, in order to improve the uniformity of diffusion and reduce the Diffusion resistance, the diameter of the exhaust orifice 911-4 should be 1/3 of the diameter of the inner tube 911-1 of the gas collection and mixing device. The inner tube 911-1 of the gas-collecting mixing device is connected to three gaseous refrigerant inlets through capillary tubes. In order to reduce the influence of the two ends of the inner tube 911-1 of the gas-collecting mixing device on the airflow organization and the mutual influence between the capillaries, the capillaries on both sides are connected to The distance between the two ends of the inner tube 911-1 of the gas collecting and mixing device should be 5 times the diameter of the inner tube 911-1, that is, 5d _n , and the distance between two adjacent capillaries should be 2d _n ~ 3d _n .

In the present invention, the liquid collection and mixing device 913 also adopts an inner and outer double-layer tube structure, and the gap between the inner tube 913-1 and the outer tube 913-2 is a static pressure layer 913-3, and the static pressure layer 913-3 acts to make the liquid refrigerant For the function of thorough mixing, the ratio _{d w} /d _n of the inner diameter d _w of the outer tube 913-2 to the outer diameter d _n of the inner tube 913-1 should be between 1.5 and 2.5. When the ratio is small, the mixing effect is poor, and the resistance is large; when the ratio is too large, the improvement of the mixing effect is reduced, the metal consumption is large, and the economy is poor. The inner pipe 913-1 evenly arranges the liquid discharge orifice 913-4, so that the liquid refrigerant flows uniformly from the inner pipe 913-1 of the liquid collection and mixing device to the static pressure layer 913-3, in order to improve the uniformity of the flow and reduce the flow rate. resistance, the diameter of the discharge orifice 913-4 should be 1/2 of the diameter of the inner tube 913-1 of the gas-collecting mixing device. The inner pipe 913-1 of the liquid collection and mixing device is connected through the outlet of the capillary condenser. In order to improve the uniformity of mixing and reduce the mutual influence between the two ends of the inner pipe 913-1 of the liquid collection and mixing device and the capillary, the capillary on both sides is mixed with the liquid collection. The distance between the two ends of the inner tube 913-1 of the device should be twice the diameter of the inner tube 913-1, that is, 2d _n , and the distance between two adjacent capillaries should be 0.5d _n ~ 1.5d _n .

In the present invention, the solid adsorption dehumidification device 22 is used for multiple purposes, and a set of devices can be used continuously for two weeks under normal conditions. It can automatically alarm when the adsorption is saturated, and can be regenerated after being exposed to sunlight after saturation.

When the air treatment device in the edible mushroom baking room is in operation, the air side circulation is as follows: the humid air after drying the edible fungi is collected in the return air static pressure space 8 and enters the air handling unit 2 through the air inlet 21, and is dehumidified by the air handling unit 2 After the temperature rises, the humidity drops sharply, the temperature rises, recovers a certain drying capacity, and is sucked by the fan 25 into the air supply main pipe 3; after the dry air is further mixed in the air supply main pipe 3 through the air mixing device 4, it enters through the air supply main pipe 3 The air supply static pressure space 7 is fully mixed in it, and the temperature and humidity field is relatively uniform; after that, the dry air enters the baking workshop 10 through the air supply orifice plate 5, passes through it at a certain flow rate and takes away the surface moisture of the edible fungus , and gradually dry the edible fungus; the air humidity after drying increases and the temperature drops, and returns to the return air static pressure space 8 through the return air orifice 6, thus completing the circulation of the air side of the baking room 1.

In the air handling unit 2, the humid air enters through the air inlet 21, and after being dehumidified by the solid adsorption dehumidification device 22, it enters the condenser 91, and flows out after fully exchanging heat with the hot refrigerant in the condenser 91 on the surface of the condenser 91. When the preset temperature cannot be reached in winter or under extreme working conditions, the auxiliary electric heater 24 can be used for auxiliary heating, and then the dry air with a certain temperature is sucked by the fan 25 and flows out of the air handling unit 2 through the air outlet. The heat pump circuit 9 of the air handling unit 2 circulates as follows: the gaseous refrigerant enters the inner pipe 911-1 of the gas collection and mixing device through three gaseous refrigerant inlets 961, 962, and 963; the gaseous refrigerant passes through the inner pipe 911-1 of the gas collection and mixing device The exhaust holes 911-4 evenly arranged on the top diffuse evenly to the static pressure layer 911-3 of the gas collection and mixing device; the gaseous refrigerant is fully mixed in the static pressure layer 911-3 of the gas collection and mixing device; the gaseous refrigerant is mixed through the gas collection The outer tube 911-2 of the device enters the serpentine tube bundle 912; the gaseous refrigerant liquefies and releases heat in the serpentine tube bundle 912 and changes from gaseous to liquid; the liquid refrigerant enters the inner tube 913-1 of the liquid collecting and mixing device from the serpentine tube bundle 912; The refrigerant flows into the static pressure layer 913-3 of the liquid collection and mixing device from the liquid discharge orifice 913-4 evenly distributed on the liquid collection and mixing device inner pipe 913-1; the liquid state in the liquid collection and mixing device static pressure layer 913-3 The refrigerant is fully mixed; the liquid refrigerant enters the first expansion valve 931, the first Second expansion valve 932, third expansion valve 933; in the compressor and evaporator assembly, the liquid refrigerant enters the first evaporator 941, The second evaporator 942 and the third evaporator 943, in the first evaporator 941, the second evaporator 942, and the third evaporator 943, the liquid refrigerant absorbs heat and changes from a liquid state to a gaseous state, and the gaseous refrigerant passes through the first compressor 951, the second compressor 952, and the third compressor 953 respectively enter the first gaseous refrigerant inlet 961, the second gaseous refrigerant inlet 962, and the third gaseous refrigerant inlet 963 to complete the cycle.

In one embodiment of the present invention, the shell of the baking room 1 is made of 2mm cold plate sprayed with plastic or stainless steel, and adopts a double-layer heat preservation structure. Baking room 1 width is 1.55 meters, and depth is 1.25 meters (including door thickness, door lock), and height is 2.25 meters (including casters). It adopts double-door structure, equipped with door buckle, handle and observation window; the bottom is equipped with casters, which is convenient for equipment movement. The inner wall of baking workshop 10 is made of stainless steel plate to make the room clean and dust-free. The effective dimensions are 1.1 meters wide, 1.2 meters high, and 1.1 meters deep, distributed in 4 layers. According to the requirements of relevant industries, the air flow rate of the baking workshop 10 is 0.2-0.5 m/s, and the air supply volume of the air handling unit 2 is 1045-2614 m ³ /h. The outlet flow velocity of the air-supply orifice 5 should not be too large. The recommended value of the present invention is 0.8-2m/s. The aperture ratio of the orifice is 25%, and the diameter of the aperture is 5mm. The effective outflow area of the orifice is calculated to be 0.33 ㎡, the number of openings required is 16807; the parameters of the return air orifice plate 6 are the same as those of the air supply orifice plate 5.

The condenser 91 of the present invention is respectively equipped with a gas collection mixing device 911 and a liquid collection mixing device 913 at the inlet and outlet of the serpentine tube bundle 912 to realize the exchange between the refrigerants of the three groups of compressors and evaporator assemblies. In the existing condenser, only On the basis of energy exchange, the exchange of working fluid is realized, the utilization efficiency of the condenser 91 is improved, the heat exchange efficiency is improved, the thermal unevenness between the refrigerant working fluids caused by uneven treatment is reduced, and the air handling unit 2 is improved. The output range and processing capacity have improved the uniformity of air treatment.

The present invention adopts the air supply and return mode of parallel air supply through the air supply orifice plate 5 and parallel return air through the air return orifice plate 6, and air supply static pressure spaces are respectively provided on the sides of the air supply orifice plate 5 and the return air orifice plate 5 7 and return air static pressure space 8, reduce the difference in the pressure of the air supply and return air orifice, thereby ensuring the uniformity of the supply air pressure and the supply air flow. During operation, the dry air enters the baking workshop 10 from the air supply orifice plate 5 at a certain flow rate, and flows horizontally therein, which has a good air flow organization and is easy to obtain a stable air flow and temperature field distribution. This parallel air supply mode is conducive to improving the airflow organization, and can ensure that the air flow and the temperature and humidity field in the baking workshop 10 are uniform and stable during operation, that is, the environment of the edible fungi in the baking workshop 10 is consistent, so that all parts The drying degree is consistent, which improves the high-quality rate of the product.

Claims (3)

1. an edible mushroom drying air cyclic processing device, it is characterized in that, this device comprises baking vessel (1), air-treatment unit (2), header pipe (3), air mixing device (4), is set in parallel in air-supply orifice plate (5) in described baking vessel (1) and return air orifice plate (6), baking vessel is divided into three regions by described air-supply orifice plate (5) and return air orifice plate (6), be respectively air-supply static pressure space (7) and the return air static pressure space (8) of both sides, and the baking workplace (10) of centre; Described air-treatment unit (2) is positioned at outside, return air static pressure space (8), air-treatment unit (2) is communicated with air-supply static pressure space (7) by header pipe (3), and described air mixing device (4) is arranged in header pipe (3) pipeline;

The air inlet (21) that described air-treatment unit (2) is set gradually by the direction of flowing along air, solid adsorption dehumidification device (22), heat pump circuit (9), blower fan (24), auxiliary electrical heater (25) and air outlet (26) form;

Described heat pump circuit (9) comprises condenser (91) and the three groups of compressors be arranged in parallel and evaporator assembly, described compressor and evaporator assembly comprise the expansion valve, evaporimeter and the compressor that are connected successively, three groups of compressors are connected with the refrigerant outlet of condenser (91) respectively with the refrigerant inlet of expansion valve in evaporator assembly, and the refrigerant outlet of compressor is connected with the refrigerant inlet of condenser (91) respectively;

Described condenser (91) comprises the gas collection mixing arrangement (911) connected successively, snakelike tube bank (912) and liquid collecting mixing arrangement (913);

Described gas collection mixing arrangement (911) comprises in gas collection to be managed (911-1) and is enclosed within gas collection outer tube (911-2) that in described gas collection, pipe (911-1) is outside, space in gas collection between pipe (911-1) and gas collection outer tube (911-2) is gas collection static pressure layer (911-3), in gas collection, upper three refrigerant inlet arranged of pipe (911-1) are the refrigerant inlet of condenser (91), in gas collection, three refrigerant inlet of pipe (911-1) are corresponding with the compressor in three groups of compressors and evaporator assembly respectively connects, gas collection outer tube (911-2) is connected with the import of snakelike tube bank (912),

Liquid collecting mixing arrangement (913) comprises in liquid collecting manages (913-1) and is enclosed within liquid collecting outer tube (913-2) that in described liquid collecting, pipe (913-1) is outside, space in liquid collecting between pipe (913-1) and liquid collecting outer tube (913-2) is liquid collecting static pressure layer (913-3), in liquid collecting, pipe (913-1) is connected with the outlet of snakelike tube bank (912), upper three refrigerant outlets arranged of liquid collecting outer tube (913-2) are the refrigerant outlet of condenser (91), three refrigerant outlets of liquid collecting outer tube (913-2) are corresponding with the expansion valve in three groups of compressors and evaporator assembly respectively to be connected.

2. edible mushroom drying air cyclic processing device according to claim 1, it is characterized in that, the tube wall of the interior pipe (911-1) of described gas collection is evenly distributed with the vent ports (911-4) be communicated with gas collection static pressure layer (911-3), the tube wall of the interior pipe (913-1) of described liquid collecting is evenly distributed with the discharge opeing aperture (913-4) be communicated with liquid collecting static pressure layer (913-3).

3. edible mushroom drying air cyclic processing device according to claim 1, it is characterized in that, described gas collection outer tube (911-2) internal diameter and the interior ratio of managing (911-1) external diameter of gas collection are 2.5 ~ 3.5, and described liquid collecting outer tube (913-2) internal diameter and the interior ratio of managing (913-1) external diameter of liquid collecting are 1.5 ~ 2.5.