Closed thermal cycle air drying system

Abstract

The utility model relates to the technical field of air dryers, and discloses a closed type heat circulation air drying system which comprises an air drying room and a control device, a stock bin used for containing materials is arranged in the air drying room, an air channel is further arranged in the air drying room, and a ventilation opening is formed between the air channel and the stock bin. A heat exchanger for heating airflow is mounted in the air duct; the hot air circulating mechanism is used for driving air flow to circularly flow between the air duct and the stock bin; the stock bin is further provided with a temperature sensor, and the temperature sensor and the heat exchanger are both electrically connected with the control device. The utility model has the advantages that: 1, the energy consumption of the air-drying process can be obviously reduced, so that the inner air-drying cost is greatly reduced, and the production requirements are met; 2, the application range is wide, and the device is suitable for large-scale centralized air drying in factories; 3, the structure is simple, and the manufacturing cost is low; and 4, automatic dehumidification and airflow replacement in the air drying room can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of air dryers, in particular to a closed heat cycle air drying system. Background Art

[0002] Meat, such as bacon, jerky, pickled meat, etc., often includes air drying and dehydration process during processing. The commonly used air drying method is to place a heater in front of a blower, and the blower guides the airflow through the heater to form a high-temperature airflow and then blows it to the meat. The high-temperature airflow takes away the moisture on the surface of the meat to achieve the purpose of removing the residual moisture inside. Although the air drying method has simple steps, it needs to turn on the heater for a long time, and the energy consumption is too high. Especially for food manufacturers who need to air dry a large amount of meat, the production cost is too high and cannot meet the existing production needs. In view of this, the inventor has made a new invention. Utility Model Content

[0003] The utility model aims to provide a closed heat circulation air drying system with the feature of low cost in view of the deficiencies of the prior art.

[0004] To achieve the above-mentioned purpose, the utility model is a closed heat circulation air-drying system, comprising an air-drying room and a control device, wherein a silo for placing materials is arranged inside the air-drying room, an air duct is also arranged inside the air-drying room, a vent is arranged between the air duct and the silo, a heat exchanger for heating the airflow is installed inside the air duct; a hot air circulation mechanism is also included, and the hot air circulation mechanism drives the airflow to circulate between the air duct and the silo; a temperature sensor is also installed in the silo, and the temperature sensor and the heat exchanger are both electrically connected to the control device.

[0005] Preferably, the air duct includes a lateral air duct arranged at the rear end of the silo and a top air duct arranged at the top end of the silo, and the lateral air duct is connected to the top air duct.

[0006] Preferably, the hot air circulation mechanism comprises a first circulation fan, which drives the airflow from the silo to flow into the side air duct and the top air duct in sequence.

[0007] Preferably, the hot air circulation mechanism also includes a second circulation fan, which is arranged in the top air duct and drives the airflow from the top air duct back to the silo; the heat exchanger is arranged between the first circulation fan and the second circulation fan.

[0008] Preferably, the second circulation fan is arranged in the top air duct through a support frame, and a dehumidifier is installed inside the support frame.

[0009] Preferably, a humidity sensor for detecting the humidity of the silo is also installed inside the silo, and the humidity sensor is electrically connected to the control device.

[0010] Preferably, a dehumidification mechanism is further included, the dehumidification mechanism is connected to the control device, and the dehumidification mechanism is used in conjunction with a humidity sensor to control the humidity of the silo.

[0011] Preferably, the dehumidification mechanism includes an exhaust outlet arranged on the top of the air-drying room, the exhaust outlet is connected to the air duct and a dehumidification fan is installed inside the exhaust outlet; an air inlet for supplementing the air flow is opened inside the air duct.

[0012] Preferably, a high-temperature heat pump drying unit is also included, and the high-temperature heat pump drying unit is electrically connected to the heat exchanger.

[0013] Preferably, a sealing door is hinged at the front end of the silo.

[0014] Beneficial effects: Compared with the prior art, the utility model is a closed heat circulation air drying system, which has the following advantages: 1. It can significantly reduce the energy consumption of the air drying process, thereby greatly reducing the cost of air drying of internal products and meeting production needs; 2. It has a wide range of applications and is suitable for large-scale centralized air drying of internal products in factories; 3. It has a simple structure and low manufacturing cost; 4. It can realize automatic dehumidification and air flow replacement inside the air drying room. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the positive internal structure of the utility model.

[0016] Figure 2 It is a schematic diagram of airflow circulation of the utility model.

[0017] Figure 3 It is a side schematic diagram of the utility model.

[0018] Figure 4 It is a schematic diagram of the top structure of the utility model.

[0019] Reference numerals include:

[0020] Air drying room--1, silo--2, temperature sensor--21, humidity sensor--22, sealing door--23, air duct--3, heat exchanger--31, side air duct--32, top air duct--33, vent--4, hot air circulation mechanism--5, first circulation fan--51, second circulation fan--52, dehumidifier--53, dehumidification mechanism--6, exhaust port--61, dehumidification fan--62, air supply port--63, high temperature heat pump drying unit--7, control device--8. DETAILED DESCRIPTION

[0021] The following is combined with Figures 1 to 4 The utility model is described in detail.

[0022] The utility model is a closed heat circulation air drying system, comprising a closed air drying room 1 and a control device 8, wherein a silo 2 for placing materials is arranged inside the air drying room 1, an air duct 3 is also arranged inside the air drying room 1, a vent 4 is arranged between the air duct 3 and the silo 2, a heat exchanger 31 for heating the air flow is installed inside the air duct 3; a hot air circulation mechanism 5 is also included, and the hot air circulation mechanism 5 drives the air flow to circulate between the air duct 3 and the silo 2; the silo 2 is also equipped with a temperature sensor 21, and the temperature sensor 21 and the heat exchanger 31 are both electrically connected to the control device 8.

[0023] The working principle of the utility model is as follows: before starting the equipment, the material is pushed into the closed silo 2 by a cart, and the hot air circulation mechanism 5 is started to drive the dry air flow to flow through the heat exchanger 31 and then circulate between the air duct 3 and the silo 2 after the temperature is increased. The air flow trajectory is as follows: Figure 2 As shown, the moisture on the surface of the meat is removed by continuous circulation of airflow, thereby achieving the purpose of air-drying the meat. At the same time, the temperature sensor 21 in the silo 2 monitors the temperature of the silo 2 in real time. When the temperature of the silo 2 exceeds the air-drying temperature preset by the control device 8, the temperature sensor 21 transmits a signal to the control device 8, and the control device drives the heat exchanger 31 to stop running. When the temperature of the silo 2 is lower than the preset air-drying temperature, the heat exchanger 31 starts again, and the operation is repeated until the meat is dried.

[0024] In the present invention, under the control of the control device 8, the temperature sensor 21 cooperates with the heat exchanger 31 to regulate the temperature of the silo 2, so that the temperature of the silo 2 can be maintained within the air-drying temperature range for a long time, and then the hot air circulation mechanism 5 drives the airflow to circulate, so that the heat exchanger 31 only needs to operate intermittently, and does not need to operate continuously, which can significantly reduce the energy consumption of the air-drying process, thereby greatly reducing the cost of air-drying of internal products, and is suitable for centralized air-drying of large-scale internal products in factories to meet production needs; on the other hand, the present invention has a simple structure and low manufacturing cost.

[0025] In the present technical solution, the air duct 3 includes a lateral air duct 32 arranged at the rear end of the silo 2 and a top air duct 33 arranged at the top of the silo 2, and the lateral air duct 32 is connected to the top air duct 33. The two parts of the air duct 3 and the silo 2 form a complete airflow loop.

[0026] As an embodiment, the hot air circulation mechanism 5 includes a first circulation fan 51, which drives the airflow from the silo 2 to flow into the side duct 32 and the top duct 33 in sequence. If the air drying room 1 is small in scale, a single circulation fan can be directly used, which has lower energy consumption.

[0027] When the air drying room 1 is large in scale, the air flow path is long. As another embodiment, the hot air circulation mechanism 5 also includes a second circulation fan 52, which is arranged in the top air duct 33. The second circulation fan 52 assists in guiding the air flow and drives the air flow from the top air duct 33 back to the silo 2; wherein the heat exchanger 31 is arranged between the first circulation fan 51 and the second circulation fan 52. Figure 1 As shown, the heat exchanger 31 can be in the side air duct 32 or in the top air duct 33 , but must be arranged before the vent 4 .

[0028] The number of the vents 4 of the utility model can be opened according to actual conditions.

[0029] To further improve the technical solution, the second circulation fan 52 is arranged on the top air duct 33 through a support frame, and a dehumidifier 53 is installed inside the support frame. The airflow flowing through the air duct 3 can be initially dehumidified in the dehumidifier 53, which prolongs the time of a single airflow cycle, and at the same time, moisture can be prevented from entering the second circulation fan 52, thereby prolonging the service life of the equipment.

[0030] Since the airflow is circulated back and forth in the air-drying room 1, the moisture content of the airflow will continue to increase after the airflow circulates for a certain period of time. At this time, if the airflow containing excessive moisture continues to circulate, it will not achieve the effect of drying the meat and may even cause the meat to rot and mold. For this reason, the inventor installs a humidity sensor 22 inside the silo 2 to monitor the humidity conditions inside the silo 2 in real time.

[0031] At the same time, a dehumidification mechanism 6 is also arranged inside the silo 2. The humidity sensor 22 and the dehumidification mechanism 6 are both electrically connected to the control device 8. Under the control of the control device 8, the dehumidification mechanism 6 and the humidity sensor 22 cooperate to adjust the humidity of the silo 2, so that the humidity of the silo 2 is always kept within a normal range. The utility model can reduce the energy consumption of the air-drying process and reduce the production cost without affecting the air-drying process of the meat, thereby ensuring the quality of the meat.

[0032] Preferably, the dehumidification mechanism 6 includes an exhaust port 61 arranged on the top of the air drying room 1, the exhaust port 61 is connected to the air duct 3 and a dehumidification fan 62 is installed inside the exhaust port 61; an air inlet 63 for supplementing air flow is opened inside the air duct 3.

[0033] The dehumidification principle is as follows: when the humidity sensor 22 detects that the humidity of the silo 2 exceeds the preset range of the control device 8, the control device 8 drives the exhaust port 61 to open after receiving the humidity sensor signal, and the dehumidification fan 62 inside the exhaust port 61 starts at the same time to guide the air flow to be discharged from the exhaust port 61. When the data of the humidity sensor 22 is normal, the exhaust port 61 is closed, and the air supply port 63 is opened to replenish the air flow inside the air drying room 1 in time. During the dehumidification and air supply process, the first circulation fan 51 and the second circulation fan 52 can operate normally without stopping and waiting, which will not affect the air drying efficiency.

[0034] like Figure 1 As shown, the technical solution also includes a high-temperature heat pump drying unit 7, which is electrically connected to the heat exchanger 31. The high-temperature heat pump drying unit 7 provides heat to the heat exchanger 31 as an external heat source, so that the heat exchanger 31 can continue to operate and heat the airflow.

[0035] In the utility model, the front end of the silo 2 is hinged with a sealed door 23. When air-drying materials, the sealed door 23 is opened, and the materials to be air-dried are pushed into the silo 2 through a cart. During the air-drying process, the sealed door 23 assists in forming a closed air-drying room 1, so that the air flow inside the air-drying room 1 can circulate normally, thereby achieving the purpose of saving energy consumption.

[0036] The above-mentioned air drying device can be used in a single group or in multiple groups, such as Figure 3 and 4 As shown, the number of air-drying devices is set according to the actual air-drying area.

[0037] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A closed heat cycle air drying system, characterized in that: The invention comprises an air drying room (1) and a control device (8), wherein a silo (2) for placing materials is arranged inside the air drying room (1), an air duct (3) is also arranged inside the air drying room (1), a vent (4) is arranged between the air duct (3) and the silo (2), and a heat exchanger (31) for heating the air flow is installed inside the air duct (3); the invention also comprises a hot air circulation mechanism (5), wherein the hot air circulation mechanism (5) drives the air flow to circulate between the air duct (3) and the silo (2); the silo (2) is also installed with a temperature sensor (21), and the temperature sensor (21) and the heat exchanger (31) are both electrically connected to the control device (8).

2. A closed heat cycle air drying system according to claim 1, characterized in that: The air duct (3) comprises a lateral air duct (32) arranged at the rear end of the silo (2) and a top air duct (33) arranged at the top end of the silo (2), and the lateral air duct (32) is connected to the top air duct (33).

3. A closed heat cycle air drying system according to claim 2, characterized in that: The hot air circulation mechanism (5) comprises a first circulation fan (51), and the first circulation fan (51) drives the air flow from the silo (2) to flow into the side air duct (32) and the top air duct (33) in sequence.

4. A closed heat cycle air drying system according to claim 3, characterized in that: The hot air circulation mechanism (5) further comprises a second circulation fan (52), which is arranged in the top air duct (33) and drives the air flow from the top air duct (33) back to the silo (2); the heat exchanger (31) is arranged between the first circulation fan (51) and the second circulation fan (52).

5. A closed heat cycle air drying system according to claim 4, characterized in that: The second circulation fan (52) is arranged on the top air duct (33) via a support frame, and a dehumidifier (53) is installed inside the support frame.

6. A closed heat cycle air drying system according to claim 1, characterized in that: A humidity sensor (22) for detecting the humidity of the silo (2) is also installed inside the silo (2), and the humidity sensor (22) is electrically connected to the control device (8).

7. A closed heat cycle air drying system according to claim 6, characterized in that: It also includes a dehumidification mechanism (6), which is connected to the control device (8), and the dehumidification mechanism (6) is used in conjunction with a humidity sensor (22) to control the humidity of the silo (2).

8. A closed heat cycle air drying system according to claim 7, characterized in that: The dehumidification mechanism (6) comprises an exhaust port (61) arranged at the top of the air drying room (1); the exhaust port (61) is connected to the air duct (3) and a dehumidification fan (62) is installed inside the exhaust port (61); and an air replenishment port (63) for replenishing air flow is opened inside the air duct (3).

9. A closed heat cycle air drying system according to claim 1, characterized in that: It also includes a high-temperature heat pump drying unit (7), and the high-temperature heat pump drying unit (7) is electrically connected to the heat exchanger (31).

10. A closed heat cycle air drying system according to any one of claims 1 to 9, characterized in that: A sealing door (23) is hingedly connected to the front end of the silo (2).

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