Open type drying heat pump with heat exchange function

Abstract

The utility model relates to the technical field of agricultural product drying, and discloses an open type drying heat pump with a heat exchange function, high-temperature and high-humidity air flow of a drying cavity is divided into two strands, one strand of high-temperature and high-humidity air flow is guided into a heat exchanger through a first moisture removal channel to be subjected to heat exchange with fresh air introduced by a first fresh air channel, and the other strand of high-temperature and high-humidity air flow is guided into a second moisture removal channel to be subjected to heat exchange. The fresh air is mixed with fresh air introduced by the second fresh air channel in the second air mixing chamber, and is exhausted after being subjected to heat absorption and dehumidification by the evaporator; the other high-temperature and high-humidity airflow is mixed with fresh air heated by the heat exchanger in the first fresh air channel in the first air mixing chamber, then is subjected to secondary heating through the condenser, and finally is introduced into the drying chamber through the air supply fan; the air supply airflow temperature and the air exhaust airflow temperature can be accurately controlled by controlling the fresh air flow of the first fresh air channel, the fresh air flow of the second fresh air channel and the high-temperature and high-humidity flow of the second humidity exhaust channel, the drying and humidity exhaust efficiency of materials to be dried is effectively improved, meanwhile, heat loss can be reduced, and efficient utilization of heat energy is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of drying agricultural products, in particular to an open drying heat pump with heat exchange. Background Art

[0002] Drying of agricultural products is a complex process involving the transfer of heat and mass, as well as precise control of multiple parameters such as temperature and humidity.

[0003] The traditional method of drying agricultural products usually adopts direct heating, that is, hot air is directly sent into the drying chamber to heat the materials to be dried. This method has some disadvantages:

[0004] First, the heat utilization efficiency is low, and a large amount of heat will be lost with the discharged hot and humid air flow; second, the temperature and humidity are difficult to control accurately, and it is difficult to achieve fine regulation of the drying process, resulting in low drying efficiency and unstable product quality; in addition, this direct heating method also has problems such as high energy consumption and environmental pollution.

[0005] In order to solve the above problems, the industry has proposed some improvement plans, such as using indirect heating, that is, first transferring heat to fresh air, and then sending the heated fresh air into the drying chamber. This method can improve the efficiency of heat utilization, but there are still some limitations: first, it is impossible to fully recover the heat in the high-temperature and high-humidity airflow in the drying chamber; second, the control accuracy of temperature and humidity parameters still needs to be improved, making it difficult to achieve fine regulation of the drying process. Utility Model Content

[0006] In view of this, the utility model provides an open drying heat pump with heat exchange, which can accurately control the supply air flow temperature and the exhaust air flow temperature by controlling the fresh air flow of the first fresh air channel and the second fresh air channel and the high-temperature and high-humidity air flow of the second dehumidification channel, thereby effectively improving the drying and dehumidification efficiency of the material to be dried, and reducing heat loss, thereby ensuring efficient use of thermal energy.

[0007] In order to achieve the above technical effects, the utility model provides an open drying heat pump with heat exchange, comprising:

[0008] A chassis, wherein the chassis is provided with an air supply port and an air exhaust port;

[0009] a partition, wherein the partition divides the chassis into a first chamber and a second chamber, the air supply port is located at a chassis position corresponding to the first chamber, and the air exhaust port is located at a chassis position corresponding to the second chamber;

[0010] A heat pump, the heat pump comprising a compressor, a condenser, an expansion throttle valve and an evaporator; the condenser is located in a first chamber, the condenser divides the first chamber into a first air mixing chamber and an air supply chamber, the air supply chamber is provided with an air supply fan; the evaporator is located in a second chamber, the evaporator divides the second chamber into a second air mixing chamber and an exhaust chamber, the exhaust chamber is provided with an exhaust fan;

[0011] A heat exchanger, the heat exchanger comprising two groups of first heat exchange pipelines and second heat exchange pipelines which are cross-arranged and independent of each other;

[0012] A first dehumidification channel, one end of which is connected to the dehumidification port of the drying chamber, and the other end of which is connected to the second air mixing chamber through a first heat exchange pipeline of the heat exchanger;

[0013] a second moisture removal passage, the second moisture removal passage being in communication with the first air mixing chamber;

[0014] a first fresh air channel, the first fresh air channel being connected to the first air mixing chamber through a second heat exchange pipeline of the heat exchanger;

[0015] A second fresh air channel is communicated with the second air mixing chamber.

[0016] Furthermore, the partition is a hollow interlayer, and the hollow interlayer of the partition is a vacuum layer.

[0017] Furthermore, an auxiliary heating mechanism is provided at the position of the heat pump air supply port.

[0018] Furthermore, the auxiliary heating mechanism is an electric heating wire.

[0019] Furthermore, a dehumidification fan is provided at the first dehumidification channel for extracting the airflow in the drying chamber to the first dehumidification channel.

[0020] Furthermore, the first dehumidification channel, the second dehumidification channel, the first fresh air channel and the second fresh air channel are all provided with corresponding flow regulating valves.

[0021] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model divides the high-temperature and high-humidity airflow in the drying chamber into two streams, one of which is drained to the first heat exchange pipeline of the heat exchanger through the first dehumidification channel in turn, and after non-contact heat exchange with the fresh air introduced from the first fresh air channel in the heat exchanger, it is mixed with the fresh air introduced from the second fresh air channel again in the second mixing chamber, and then discharged to the external environment after heat absorption and dehumidification by the evaporator; the other high-temperature and high-humidity airflow is mixed with the fresh air heated by the first fresh air channel through the heat exchanger in the first mixing chamber, and then heated for the second time by the condenser, and finally introduced into the drying chamber through the supply air fan, so as to meet the requirements of drying and dehumidification, and can accurately control the supply air flow temperature and the exhaust air flow temperature by controlling the fresh air flow rates of the first fresh air channel and the second fresh air channel and the high-temperature and high-humidity air flow rate of the second dehumidification channel, so as to effectively improve the drying and dehumidification efficiency of the material to be dried, and also reduce heat loss, so as to ensure efficient utilization of thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of an open drying heat pump with heat exchange in the embodiment;

[0024] Among them, 1. chassis; 2. air supply port; 3. air exhaust port; 4. partition; 5. condenser; 6. evaporator; 7. first air mixing chamber; 8. air supply chamber; 9. air supply fan; 10. second air mixing chamber; 11. exhaust chamber; 12. exhaust fan; 13. heat exchanger; 14. first dehumidification channel; 15. second dehumidification channel; 16. first fresh air channel; 17. second fresh air channel. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0027] Example

[0028] See also Figure 1 , an open drying heat pump with heat exchange, comprising:

[0029] A chassis 1, wherein the chassis 1 is provided with an air supply port 2 and an air exhaust port 3;

[0030] a partition 4, wherein the partition 4 divides the chassis 1 into a first chamber and a second chamber, the air supply port 2 is located at a position of the chassis 1 corresponding to the first chamber, and the air exhaust port 3 is located at a position of the chassis 1 corresponding to the second chamber;

[0031] A heat pump, the heat pump comprising a compressor, a condenser 5, an expansion throttle valve and an evaporator 6; the condenser 5 is located in a first chamber, the condenser 5 divides the first chamber into a first air mixing chamber 7 and an air supply chamber 8, the air supply chamber 8 is provided with an air supply fan 9; the evaporator 6 is located in a second chamber, the evaporator 6 divides the second chamber into a second air mixing chamber 10 and an exhaust chamber 11, the exhaust chamber 11 is provided with an exhaust fan 12;

[0032] A heat exchanger 13, wherein the heat exchanger 13 comprises two groups of first heat exchange pipelines and second heat exchange pipelines which are cross-arranged and independent of each other;

[0033] A first dehumidification channel 14, one end of which is connected to the dehumidification port of the drying chamber, and the other end of which is connected to the second air mixing chamber 10 through a first heat exchange pipeline of the heat exchanger 13;

[0034] A second moisture removal passage 15, wherein the second moisture removal passage 15 is communicated with the first air mixing chamber 7;

[0035] A first fresh air passage 16, wherein the first fresh air passage 16 is connected to the first air mixing chamber 7 through a second heat exchange pipeline of the heat exchanger 13;

[0036] The second fresh air passage 17 is communicated with the second air mixing chamber 10 .

[0037] In the present embodiment, the high-temperature and high-humidity airflow in the drying chamber is divided into two streams, one of which is guided to the first heat exchange pipeline of the heat exchanger 13 through the first dehumidification channel 14 in turn, and after non-contact heat exchange with the fresh air introduced from the first fresh air channel 16 in the heat exchanger 13, it is mixed with the fresh air introduced from the second fresh air channel 17 in the second mixing chamber 10, and then discharged to the external environment after heat absorption and dehumidification by the evaporator 6; the other high-temperature and high-humidity airflow is mixed with the fresh air heated by the heat exchanger 13 in the first mixing chamber 7 and the first fresh air channel 16, and then heated for the second time by the condenser 5, and finally introduced into the drying chamber through the supply fan 9, so as to meet the requirements of drying and dehumidification, and can accurately control the supply air flow temperature and the exhaust air flow temperature by controlling the fresh air flow rate of the first fresh air channel 16 and the second fresh air channel 17 and the high-temperature and high-humidity air flow rate of the second dehumidification channel 15, so as to effectively improve the drying and dehumidification efficiency of the material to be dried, reduce heat loss, and ensure efficient use of thermal energy.

[0038] The partition 4 in this embodiment is a hollow interlayer, and the hollow interlayer of the partition 4 is a vacuum layer, which can minimize the heat exchange between the internal chambers of the heat pump and further ensure the precise control of the supply air flow temperature and the exhaust air flow temperature.

[0039] In order to ensure that the design air supply temperature entering the drying chamber meets the requirements, it is usually necessary to add an auxiliary heating mechanism at the position of the heat pump air supply port 2, so as to heat the mixed air flow to the design air supply temperature when the temperature of the mixed air flow after being heated by the condenser 5 is lower than T1. As described in this embodiment, the auxiliary heating mechanism is an electric heating wire.

[0040] In this embodiment, a dehumidification fan is provided at the first dehumidification channel 14 for extracting the airflow in the drying chamber to the first dehumidification channel 14 .

[0041] In addition, the first dehumidification channel 14, the second dehumidification channel 15, the first fresh air channel 16 and the second fresh air channel 17 are all provided with corresponding flow regulating valves to ensure that the flow of each channel meets the control requirements of the drying system.

[0042] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An open drying heat pump with heat exchange, characterized in that: include: A chassis (1), wherein the chassis (1) is provided with an air supply port (2) and an air exhaust port (3); a partition (4), wherein the partition (4) divides the chassis (1) into a first chamber and a second chamber, the air supply port (2) is located at a position of the chassis (1) corresponding to the first chamber, and the air exhaust port (3) is located at a position of the chassis (1) corresponding to the second chamber; A heat pump, the heat pump comprising a compressor, a condenser (5), an expansion throttle valve and an evaporator (6); the condenser (5) is located in a first chamber, the condenser (5) divides the first chamber into a first air mixing chamber (7) and an air supply chamber (8), the air supply chamber (8) is provided with an air supply fan (9); the evaporator (6) is located in a second chamber, the evaporator (6) divides the second chamber into a second air mixing chamber (10) and an exhaust chamber (11), the exhaust chamber (11) is provided with an exhaust fan (12); A heat exchanger (13), the heat exchanger (13) comprising two groups of first heat exchange pipelines and second heat exchange pipelines which are cross-arranged and independent of each other; A first dehumidification channel (14), one end of which is used to communicate with the dehumidification port of the drying chamber, and the other end of which is connected to the second air mixing chamber (10) through a first heat exchange pipeline of the heat exchanger (13); A second moisture removal channel (15), the second moisture removal channel (15) being in communication with the first air mixing chamber (7); A first fresh air channel (16), wherein the first fresh air channel (16) is connected to the first air mixing chamber (7) through a second heat exchange pipeline of the heat exchanger (13); A second fresh air passage (17), wherein the second fresh air passage (17) is connected to the second air mixing chamber (10).

2. The open drying heat pump with heat exchange according to claim 1, characterized in that: The partition (4) is a hollow interlayer, and the hollow interlayer of the partition (4) is a vacuum layer.

3. The open drying heat pump with heat exchange according to claim 1, characterized in that: An auxiliary heating mechanism is arranged at the position of the heat pump air supply port (2).

4. The open drying heat pump with heat exchange according to claim 3, characterized in that: The auxiliary heating mechanism is an electric heating wire.

5. The open drying heat pump with heat exchange according to claim 1, characterized in that: A dehumidification fan is provided at the first dehumidification channel (14) for extracting the airflow in the drying chamber to the first dehumidification channel (14).

6. The open drying heat pump with heat exchange according to any one of claims 1 to 5, characterized in that: The first dehumidification channel (14), the second dehumidification channel (15), the first fresh air channel (16) and the second fresh air channel (17) are all provided with corresponding flow regulating valves.

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