Efficient dehumidifying open type drying heat pump
By setting up a return air chamber and a moisture discharge chamber in the heat pump drying system, and using the jet pipeline to form a secondary mixing of the airflow and fresh air, the problem of high temperature and high humidity airflow are solved, resulting in low efficiency of the evaporator, and the effect of efficient moisture discharge and heat energy utilization is achieved.
Patent Information
- Application Number
- CN202421644768.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-11
AI Technical Summary
When using a heat pump to dry agricultural products, the temperature of the high-temperature and high-humidity air flow is too high, resulting in low efficiency of the evaporator and poor humidity discharge effect.
An efficient open-drying drying heat pump is designed. By setting up a return air chamber and a dehydration chamber, and after the high-temperature and high-humidity air flow in the dehydration chamber is heat exchanged, a pressure difference is formed using the jet pipeline to make the gas and the external fresh air secondary mix.
This technology not only reduces heat loss, ensures efficient utilization of heat energy, but also improves the energy efficiency of the evaporator and improves the humidity discharge efficiency of the open heat pump.
Smart Images
Figure CN222799554U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of drying agricultural products, in particular to a high-efficiency moisture-discharging open-type drying heat pump. Background Art
[0002] When using a heat pump as a heat source to dry agricultural products, the hot end condenser can heat the airflow, and the cold end evaporator can condense and dehumidify the high-temperature and high-humidity airflow discharged from the drying chamber. However, during the dehumidification process, the temperature of the high-temperature and high-humidity airflow is too high, which does not match the working conditions of the evaporator, so that the evaporator cannot achieve a high efficiency and the dehumidification effect is poor. Utility Model Content
[0003] In view of this, the utility model provides a high-efficiency dehumidification open drying heat pump, which can not only reduce heat loss and ensure efficient utilization of thermal energy, but also improve the energy efficiency of the evaporator, provide the evaporator with better working conditions, and ensure the dehumidification efficiency of the open heat pump.
[0004] In order to achieve the above technical effects, the utility model provides a high-efficiency dehumidification open drying heat pump, comprising:
[0005] A chassis, wherein the chassis is provided with an air supply port and an air exhaust port;
[0006] a first partition, wherein the first 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, the first chamber is provided with an air supply fan, and the air exhaust port is located at a chassis position corresponding to the second chamber;
[0007] A dehumidification box, wherein a second partition is arranged in the dehumidification box, and the second partition divides the inner cavity of the dehumidification box into a dehumidification chamber and a return air chamber; one end of the dehumidification chamber is connected with the inner cavity of the drying chamber, and the other end is connected with the first chamber; one end of the return air chamber is connected with the inner cavity of the drying chamber, and the other end is connected with the second chamber through a jet pipe, and the jet pipe includes a jet pipe, and the jet pipe is a cone structure, the small-diameter end of the jet pipe is located in the second chamber, and the large-diameter end of the jet pipe is connected to the dehumidification chamber through a dehumidification fan;
[0008] A fresh air channel, which is arranged at a chassis position corresponding to the second chamber, and is located obliquely behind the small-diameter end of the injection pipe;
[0009] A heat pump, the heat pump comprising a compressor, a condenser, an expansion throttle valve and an evaporator; the condenser is located in the first chamber, and the evaporator is located in the second chamber;
[0010] A water receiving tray, the water receiving tray is located in the second chamber and directly below the evaporator, and the water receiving tray is also connected to a guide pipe for guiding condensed water out of the second chamber;
[0011] The heat exchanger comprises two groups of first heat exchange pipelines and second heat exchange pipelines which are cross-arranged and independent of each other; one end of the first heat exchange pipeline is connected to the dehumidification chamber, the other end of the first heat exchange pipeline is connected to the inlet end of the dehumidification fan, one end of the second heat exchange pipeline is connected to the return air chamber, and the other end of the second heat exchange pipeline is connected to the outside atmosphere.
[0012] Furthermore, the fresh air channel includes a plurality of air inlet holes or air inlet slots, the outlet air flow direction of the fresh air channel is at an angle of 20 to 60 degrees to the axial direction of the injection pipe, and the outlet air flow direction of the fresh air channel is inclined toward the evaporator.
[0013] Furthermore, the inlet end and the outlet end of the fresh air channel are staggered by 15 to 25 degrees along the circumference of the injection pipe.
[0014] Furthermore, a spoiler column is provided in the second chamber, the spoiler column is located between the injection pipe and the evaporator, and the spoiler column is perpendicular to the axial direction of the injection pipe.
[0015] Furthermore, the condenser divides the first chamber into a mixing chamber and an air supply chamber; the mixing chamber is connected to the return air chamber, the air supply port is located at the chassis position corresponding to the air supply chamber, the air supply fan is located in the air supply chamber, and a temperature sensor is provided in the air supply chamber.
[0016] Furthermore, an auxiliary heating mechanism is provided at the position of the heat pump air supply port.
[0017] Furthermore, the auxiliary heating mechanism is an electric heating wire.
[0018] Compared with the prior art, the beneficial effects of the utility model are as follows: the open drying heat pump of the utility model is provided with a return air chamber and a dehumidification chamber, and the high-temperature and high-humidity airflow in the dehumidification chamber is first subjected to heat exchange through a heat exchanger, and then a pressure difference is formed by a jet pipe to allow the dehumidification chamber gas after heat exchange to be mixed with the outside fresh air for a second time, which can not only reduce heat loss and ensure efficient utilization of thermal energy, but also improve the energy efficiency of the evaporator, provide the evaporator with better working conditions, and ensure the dehumidification efficiency of the open heat pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] 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.
[0020] Figure 1 It is a structural schematic diagram of a high-efficiency dehumidification open-type drying heat pump in an embodiment;
[0021] Among them, 1. chassis; 2. air supply port; 3. air exhaust port; 4. first partition; 5. air supply chamber; 6. second chamber; 7. air supply fan; 8. dehumidification box; 9. second partition; 10. dehumidification chamber; 11. return air chamber; 12. jet duct; 13. fresh air channel; 14. condenser; 15. evaporator; 16. water tray; 17. heat exchanger; 18. spoiler column; 19. mixing chamber; 20. temperature sensor; 21. auxiliary heating mechanism; 22. dehumidification fan. DETAILED DESCRIPTION
[0022] The embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0023] 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.
[0024] Example
[0025] See also Figure 1 , a high-efficiency dehumidification open drying heat pump, comprising:
[0026] A chassis 1, wherein the chassis 1 is provided with an air supply port 2 and an air exhaust port 3;
[0027] a first partition 4, wherein the first partition 4 divides the chassis 1 into a first chamber and a second chamber 6, the air supply port 2 is located at a position of the chassis 1 corresponding to the first chamber, the first chamber is provided with an air supply fan 7, and the air exhaust port 3 is located at a position of the chassis 1 corresponding to the second chamber 6;
[0028] A dehumidification box 8, wherein a second partition 9 is arranged in the dehumidification box 8, and the second partition 9 divides the inner cavity of the dehumidification box 8 into a dehumidification chamber 10 and a return air chamber 11; one end of the dehumidification chamber 10 is connected to the inner cavity of the drying chamber, and the other end is connected to the first chamber; one end of the return air chamber 11 is connected to the inner cavity of the drying chamber, and the other end is connected to the second chamber 6 through a jet pipe 12, and the jet pipe 12 includes a jet pipe, and the jet pipe is a cone structure, the small-diameter end of the jet pipe is located in the second chamber 6, and the large-diameter end of the jet pipe is connected to the dehumidification chamber 10 through a dehumidification fan 22;
[0029] A fresh air passage 13, which is arranged at a position of the chassis 1 corresponding to the second chamber 6, and is located obliquely behind the small-diameter end of the injection pipe;
[0030] A heat pump, the heat pump comprising a compressor, a condenser 14, an expansion throttle valve and an evaporator 15; the condenser 14 is located in the first chamber, and the evaporator 15 is located in the second chamber 6;
[0031] A water receiving tray 16, the water receiving tray 16 is located in the second chamber 6 and directly below the evaporator 15, and the water receiving tray 16 is also connected to a guide pipe for guiding condensed water out of the second chamber 6;
[0032] The heat exchanger 17 includes two groups of first heat exchange pipelines and second heat exchange pipelines which are cross-arranged and independent of each other; one end of the first heat exchange pipeline is connected to the dehumidification chamber 10, and the other end of the first heat exchange pipeline is connected to the inlet end of the dehumidification fan 22; one end of the second heat exchange pipeline is connected to the return air chamber 11, and the other end of the second heat exchange pipeline is connected to the outside atmosphere.
[0033] In this embodiment, the high-temperature and high-humidity airflow discharged from the drying chamber is divided into two streams, one of which enters the dehumidification chamber 10, and the other enters the return air chamber 11;
[0034] Among them, the high temperature and high humidity airflow of the dehumidification chamber 10 enters the heat exchanger 17 through the first heat exchange pipeline, and generates heat exchange with the outside air flowing in through the second heat exchange pipeline, forming a low temperature and high humidity airflow, which is introduced into the injection pipe by the dehumidification fan 22. In the process of the injection pipe spraying the low temperature and high humidity airflow into the first chamber, negative pressure will be generated behind the injection port of the injection pipe, so that under the action of the pressure difference, the outside air can enter the first chamber from the fresh air channel 13 and mix with the low temperature and high humidity airflow, so as to achieve the cooling of the low temperature and high humidity airflow. Then, when the mixed low temperature gas flows through the evaporator 15, the water vapor in the mixed low temperature gas can be quickly condensed into water mist, so as to achieve gas-mist separation, and the airflow separated from the water mist is discharged from the exhaust port 3. At the same time, the high temperature and high humidity airflow entering the return air chamber 11 is mixed with the outside air heated by the second heat exchange pipeline, and the high temperature and low humidity mixed airflow formed is heated by the condenser 14, and then enters the drying chamber from the air supply port 2 to achieve drying and heating of the material. The open drying heat pump in this embodiment is provided with a return air chamber 11 and a dehumidification chamber 10, and the high-temperature and high-humidity airflow in the dehumidification chamber 10 is first subjected to heat exchange through a heat exchanger 17, and then a pressure difference is formed by a jet duct 12 to allow the gas in the dehumidification chamber 10 after the heat exchange to be mixed with the fresh air from the outside for a second time. This can not only reduce heat loss and ensure efficient use of thermal energy, but also improve the energy efficiency of the evaporator 15, provide the evaporator 15 with a better working condition, and ensure the dehumidification efficiency of the open heat pump.
[0035] In this embodiment, the fresh air channel 13 includes a plurality of air inlet holes or air inlet slots, and the outlet air flow direction of the fresh air channel 13 is at an angle of 20 to 60 degrees to the axial direction of the injection pipe, and the outlet air flow direction of the fresh air channel 13 is inclined toward the evaporator 15, which can avoid the problem that the outside air entering from the fresh air channel 13 is in opposite directions to the high-temperature air flow ejected from the jet duct 12, thereby reducing wind resistance, ensuring that the flow rate of the cooling fresh air entering the second chamber 6 meets the requirements, and further ensuring the efficiency of the evaporator 15.
[0036] In this embodiment, the inlet and outlet ends of the fresh air channel 13 are staggered by 15 to 25 degrees along the circumference of the injection pipe, so that the cooling fresh air entering the second chamber 6 from the fresh air channel 13 can be mixed with the ejected high-temperature airflow to form a vortex, thereby improving the mixing efficiency of the cooling fresh air and the high-temperature and high-humidity airflow.
[0037] In this embodiment, a spoiler column 18 is provided in the second chamber 6. The spoiler column 18 is located between the injection pipe and the evaporator 15, and the spoiler column 18 is perpendicular to the axial direction of the injection pipe, which can further improve the mixing efficiency of the cooling fresh air and the high-temperature and high-humidity airflow.
[0038] In this embodiment, the condenser 14 divides the first chamber into a mixing chamber 19 and an air supply chamber 5; the mixing chamber 19 is connected to the return air chamber 11, the air supply port 2 is located at the position of the chassis 1 corresponding to the air supply chamber 5, the air supply fan 7 is located in the air supply chamber 5, and a temperature sensor 20 is provided in the air supply chamber 5. The temperature sensor 20 can monitor the temperature in the air supply chamber 5 in real time, so that the operator can know in time whether the air flow temperature in the air supply chamber 5 reaches the designed air inlet temperature requirement.
[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 21 at the position of the air supply port 2, so that when the temperature of the mixed air flow after being heated by the condenser 14 is lower than the design air inlet temperature requirement, the mixed air flow in the air supply chamber 5 is heated to the design air supply temperature. As described in this embodiment, the auxiliary heating mechanism 21 is an electric heating wire.
[0040] 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. A high-efficiency dehumidification open drying heat pump, 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 first partition (4), wherein the first partition (4) divides the chassis (1) into a first chamber and a second chamber (6), the air supply port (2) being located at a position of the chassis (1) corresponding to the first chamber, the first chamber being provided with an air supply fan (7), and the air exhaust port (3) being located at a position of the chassis (1) corresponding to the second chamber (6); A dehumidification box (8), wherein a second partition (9) is arranged in the dehumidification box (8), and the second partition (9) divides the inner cavity of the dehumidification box (8) into a dehumidification chamber (10) and a return air chamber (11); one end of the dehumidification chamber (10) is connected to the inner cavity of the drying chamber, and the other end is connected to the first chamber; one end of the return air chamber (11) is connected to the inner cavity of the drying chamber, and the other end is connected to the second chamber (6) through a jet pipe (12), and the jet pipe (12) includes a jet pipe, and the jet pipe is a conical cylinder structure. The small-diameter end of the jet pipe is located in the second chamber (6), and the large-diameter end of the jet pipe is connected to the dehumidification chamber (10) through a dehumidification fan (22); A fresh air passage (13), the fresh air passage (13) being arranged at a position of the chassis (1) corresponding to the second chamber (6), and the fresh air passage (13) being located obliquely behind the small-diameter end of the injection pipe; A heat pump, the heat pump comprising a compressor, a condenser (14), an expansion throttle valve and an evaporator (15); the condenser (14) is located in a first chamber, and the evaporator (15) is located in a second chamber (6); a water receiving tray (16), the water receiving tray (16) being located in the second chamber (6) and directly below the evaporator (15), the water receiving tray (16) being further connected to a guide pipe for guiding condensed water out of the second chamber (6); A heat exchanger (17), the heat exchanger (17) comprising two groups of first heat exchange pipelines and second heat exchange pipelines which are cross-arranged and independent of each other; one end of the first heat exchange pipeline is connected to the dehumidification chamber (10), the other end of the first heat exchange pipeline is connected to the inlet end of the dehumidification fan (22), one end of the second heat exchange pipeline is connected to the return air chamber (11), and the other end of the second heat exchange pipeline is connected to the outside atmosphere.
2. The high-efficiency dehumidification open-type drying heat pump according to claim 1 is characterized in that: The fresh air channel (13) comprises a plurality of air inlet holes or air inlet slots, the outlet air flow direction of the fresh air channel (13) is at an angle of 20 to 60 degrees to the axial direction of the injection pipe, and the outlet air flow direction of the fresh air channel (13) is inclined toward the evaporator (15).
3. The high-efficiency dehumidification open-type drying heat pump according to claim 2 is characterized in that: The inlet end and the outlet end of the fresh air channel (13) are staggered by 15 to 25 degrees along the circumference of the injection pipe.
4. The high-efficiency dehumidification open-type drying heat pump according to claim 1 is characterized in that: A spoiler column (18) is arranged in the second chamber (6); the spoiler column (18) is located between the injection pipe and the evaporator (15), and the spoiler column (18) is perpendicular to the axial direction of the injection pipe.
5. The high-efficiency dehumidification open-type drying heat pump according to claim 1 is characterized in that: The condenser (14) divides the first chamber into an air mixing chamber (19) and an air supply chamber (5); the air mixing chamber (19) is connected to the air return chamber (11); the air supply port (2) is located at a position of the chassis (1) corresponding to the air supply chamber (5); the air supply fan (7) is located in the air supply chamber (5); and a temperature sensor (20) is provided in the air supply chamber (5).
6. The high-efficiency dehumidification open-type drying heat pump according to claim 5, characterized in that: An auxiliary heating mechanism (21) is provided at the position of the heat pump air supply port (2).
7. The high-efficiency dehumidification open-type drying heat pump according to claim 6, characterized in that: The auxiliary heating mechanism (21) is an electric heating wire.