Closed dehumidification heat pump structure and drying equipment applying same

Abstract

The utility model relates to the technical field of closed dehumidification heat pump structures, and discloses a closed dehumidification heat pump structure and drying equipment applying the closed dehumidification heat pump structure, and the closed dehumidification heat pump structure comprises a dehumidification channel, a first heat pump, a heat pipe heat exchanger and a circulating fan. The closed dehumidification heat pump structure is arranged in the drying chamber of the drying equipment, the heat pump can be used for dehumidifying and heating moisture removal airflow, the heat pipe heat exchanger is used for achieving heat cyclic utilization of the high-temperature moisture removal airflow, the cyclic utilization efficiency of heat energy is improved, meanwhile, closed cyclic dehumidification of the drying equipment is achieved, and the drying efficiency of the drying equipment is improved. And the stability and controllability of the drying process are ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of closed-loop dehumidification heat pump structure, specifically to a closed-loop dehumidification heat pump structure and its application in drying equipment. Background Technology

[0002] Traditional open-loop systems are prone to introducing humid outside air, leading to decreased drying efficiency and increased energy consumption. Furthermore, existing closed-loop dehumidifying heat pump systems often face challenges in humidity control and energy efficiency optimization during operation. For example, when processing materials with high humidity, they often suffer from insufficient dehumidification capacity and low heat recovery efficiency. In addition, traditional closed-loop dehumidifying heat pump systems are often complex in design, have high maintenance costs, and their stability and reliability are difficult to guarantee under certain operating conditions. Utility Model Content

[0003] In view of this, the present invention provides a closed-loop dehumidification heat pump structure and its application in drying equipment, which can improve the efficiency of heat energy recycling while realizing closed-loop dehumidification of the drying equipment, ensuring the stability and controllability of the drying process.

[0004] To achieve the above technical effects, this utility model provides a closed-loop dehumidification heat pump structure, comprising:

[0005] A dehumidification channel is used to connect with the dehumidification port of the drying equipment, and the dehumidification channel includes a first airflow channel and a second airflow channel;

[0006] The first heat pump includes a first evaporator and a first condenser connected by a compressor, a throttling expansion valve, and a circulation pipeline; the first evaporator is disposed in a dehumidification channel and is used to condense and dehumidify all or part of the airflow in the dehumidification channel; the first condenser is disposed in a second airflow channel and is used to heat the airflow entering the second airflow channel.

[0007] A heat pipe heat exchanger includes a heat pipe evaporator and a heat pipe condenser that are connected to each other. The heat pipe evaporator is located in a first airflow channel or a second airflow channel between the first evaporator and the exhaust port. The heat pipe condenser is located between the first evaporator and the air outlet of the first airflow channel.

[0008] A circulating fan is used to drive the airflow discharged from the exhaust port to flow through the first heat pump and the heat pipe heat exchanger, and then return to the drying chamber from the air outlet of the first airflow channel or the second airflow channel.

[0009] Furthermore, it also includes a second heat pump, which includes a second evaporator and a second condenser connected through a compressor, a throttling expansion valve and a circulation pipeline. The second evaporator is disposed in the first airflow channel and is located between the first evaporator and the heat pipe condenser. The second condenser is disposed in the first airflow channel and is located between the second evaporator and the first air inlet.

[0010] Furthermore, it also includes a third heat pump, which includes a first heat exchange component and a second heat exchange component connected by a compressor, a throttling expansion valve and a circulation pipeline; the first heat exchange component is disposed in the atmospheric environment and is used to absorb heat from the atmosphere or release heat to the atmospheric environment; the second heat exchange component is disposed in a first airflow channel or a second airflow channel near the exhaust port and is used to condense and dehumidify or heat all or part of the airflow discharged from the exhaust port.

[0011] Furthermore, a control valve is provided on the second airflow channel to control the opening or closing of the second airflow channel.

[0012] To achieve the above technical effects, this utility model also provides a drying device, including a drying chamber, wherein the drying chamber is provided with a first air inlet, a second air inlet and a dehumidification outlet, and the drying chamber is equipped with the aforementioned closed-loop dehumidification heat pump structure; wherein, the first air inlet is connected to the air outlet of the first airflow channel, and the second air inlet is connected to the air outlet of the second airflow channel.

[0013] Furthermore, the drying equipment is equipped with at least two sets of the aforementioned closed-loop dehumidification heat pump structures.

[0014] Furthermore, the drying chamber is provided with a feed inlet and a discharge outlet, and a multi-layer mesh belt material conveyor is provided inside the drying chamber to transport the material to be dried from the feed inlet to the discharge outlet.

[0015] Furthermore, the first air inlet is located at the bottom of the drying chamber or on the side wall near the bottom of the drying chamber, and the second air inlet is located on the side wall of the drying chamber between the exhaust port and the first air inlet.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model can use a heat pump to dehumidify and heat the exhaust airflow, and use a heat pipe heat exchanger to realize the thermal circulation utilization of the high-temperature exhaust airflow, thereby improving the efficiency of heat energy circulation utilization and realizing closed-loop dehumidification of the drying equipment, ensuring the stability and controllability of the drying process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the closed-loop dehumidification heat pump structure in the embodiment;

[0019] Figure 2 This is a schematic diagram of the drying equipment with a closed-loop dehumidification heat pump structure in the embodiment.

[0020] The components include: 1. First airflow channel; 2. Second airflow channel; 3. First evaporator; 4. First condenser; 5. Heat pipe evaporator; 6. Heat pipe condenser; 7. Circulating fan; 8. Second evaporator; 9. Second condenser; 10. First heat exchange assembly; 11. Second heat exchange assembly; 12. Drying chamber; 13. First air inlet; 14. Second air inlet; 15. Exhaust outlet; 16. Control valve; and 17. Mesh belt material conveyor. Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Example

[0024] See Figure 1 and Figure 2 A closed-loop dehumidification heat pump structure, comprising:

[0025] A dehumidification channel is used to communicate with the dehumidification port 15 of the drying equipment. The dehumidification channel includes a first airflow channel 1 and a second airflow channel 2.

[0026] The first heat pump includes a first evaporator 3 and a first condenser 4 connected by a compressor, a throttling expansion valve and a circulation pipeline; the first evaporator 3 is disposed in the dehumidification channel and is used to condense and dehumidify all or part of the airflow in the dehumidification channel; the first condenser 4 is disposed in the second airflow channel 2 and is used to heat the airflow entering the second airflow channel 2.

[0027] A heat pipe heat exchanger includes a heat pipe evaporator 5 and a heat pipe condenser 6 that are connected to each other. The heat pipe evaporator 5 is located in a first airflow channel 1 or a second airflow channel 2 between the first evaporator 3 and the exhaust port 15. The heat pipe condenser 6 is located between the first evaporator 3 and the air outlet of the first airflow channel 1.

[0028] The circulating fan 7 is used to drive the airflow discharged from the exhaust port 15 to flow back to the drying chamber 12 after passing through the first heat pump and the heat pipe heat exchanger.

[0029] In this embodiment, after the exhaust airflow in the drying equipment enters the exhaust channel of the closed dehumidification heat pump structure from the exhaust port 15, it can be divided into two streams. One stream enters the first exhaust channel, and the other enters the second exhaust channel. The airflow in the second exhaust channel can be heated by the first condenser 4 and then flows back to the drying chamber 12 from the outlet of the second exhaust channel. The function of the heat pipe heat exchanger is to absorb the heat of the high-temperature and high-humidity airflow from the exhaust port 15 using the heat pipe evaporator 5, and then transfer the heat to the heat pipe condenser 6 through the heat pipe heat exchange structure. The heat pipe condenser 6 heats the airflow in the first airflow channel 1, and then the airflow flows back to the drying chamber 12 from the outlet of the first exhaust channel.

[0030] In this embodiment, the positions of the first evaporator 3 and the heat pipe evaporator 5 can be configured in three ways:

[0031] One approach is to place the first evaporator 3 or the heat pipe evaporator 5 inside the first airflow channel 1, and separately absorb heat and condense the exhaust airflow inside the first airflow channel 1 for dehumidification; then, after being heated by the heat pipe condenser 6, the airflow returns from the outlet of the first exhaust channel to the drying chamber 12, thereby achieving closed-loop dehumidification during the drying process.

[0032] Secondly, the first evaporator 3 or heat pipe evaporator 5 is set in the second airflow channel 2. The airflow in the second airflow channel 2 is preheated, condensed and dehumidified, and then heated by the first condenser 4 and returned to the drying chamber 12 from the air outlet of the second dehumidification channel. This can also achieve closed-loop dehumidification during the drying process.

[0033] Thirdly, the first evaporator 3 or the heat pipe evaporator 5 is set near the outlet end of the exhaust port 15. That is, before the exhaust airflow is split and enters the first exhaust channel and the second exhaust channel respectively, all the exhaust airflow is preheated, condensed and dehumidified, and then reheated by the heating components in the corresponding airflow channels and returned to the drying chamber 12.

[0034] It should be noted that the first evaporator 3 and the heat pipe evaporator 5 are not necessarily set up in the same way at the same time. Instead, each has three installation positions, which can be combined and set up as needed.

[0035] The closed-loop dehumidification heat pump structure in this embodiment also includes a second heat pump. The second heat pump includes a second evaporator 8 and a second condenser 9 connected via a compressor, a throttling expansion valve, and a circulation pipeline. The second evaporator 8 is disposed within the first airflow channel 1, and is located between the first evaporator 3 and the heat pipe condenser 6. The second condenser 9 is disposed within the first airflow channel 1, and is located between the second evaporator 8 and the first air inlet 13. The second evaporator 8 enhances the dehumidification efficiency within the first airflow channel 1, achieving efficient dehumidification of the airflow within the first airflow channel 1, thereby improving the drying efficiency of the drying equipment.

[0036] The closed-loop dehumidification heat pump structure in this embodiment also includes a third heat pump. The third heat pump includes a first heat exchange component 10 and a second heat exchange component 11 connected through a compressor, a throttling expansion valve, and a circulation pipeline. The first heat exchange component 10 is located in the atmospheric environment and is used to absorb heat from the atmosphere or release heat to the atmospheric environment. The second heat exchange component 11 is located in the first airflow channel 1 or the second airflow channel 2 near the exhaust port 15 and is used to condense and dehumidify or heat all or part of the airflow discharged from the exhaust port 15. The first heat exchange component 10 is either an evaporator or a condenser. When the temperature inside the drying chamber 12 is too high, the first heat exchange component 10 can be set as an evaporator (by adjusting the direction of the third heat pump), and the second heat exchange component 11 can be set as a condenser. The condenser releases excess heat to the environment, while the evaporator dehumidifies the exhaust airflow. When the temperature inside the drying chamber 12 is too low, the first heat exchange component 10 can be switched to a condenser, and the second heat exchange component 11 can be switched to an evaporator. The evaporator absorbs heat from the environment to heat the exhaust airflow. The third heat pump can utilize natural cold or heat sources in the environment. By switching between the first heat exchange component 10 and the second heat exchange component 11, it can dehumidify or heat the exhaust airflow, thereby improving energy utilization efficiency. Furthermore, the closed-loop dehumidification heat pump structure in this embodiment can also be equipped with an intelligent control system. This system can automatically adjust the operating state of the third heat pump based on parameters such as the temperature and humidity inside the drying chamber 12 and the temperature and humidity of the exhaust airflow. This includes adjusting the compressor speed, the opening of the throttling expansion valve, and the switching between the first heat exchange component 10 and the second heat exchange component 11, to achieve optimal dehumidification and heating effects.

[0037] In this embodiment, a control valve 16 is provided on the second airflow channel 2 to control the opening and closing of the second airflow channel 2. When the temperature uniformity inside the drying chamber 12 is moderate, the control valve 16 can be closed to reduce unnecessary energy consumption. When rapid dehumidification or temperature uniformity adjustment is required inside the drying chamber 12, the control valve 16 can be opened to allow the exhaust airflow to smoothly pass through the second airflow channel 2 and enter the drying chamber 12, thereby accelerating the airflow inside the drying chamber 12, ensuring the uniformity of temperature distribution inside the drying chamber 12, and achieving the best energy-saving effect and drying performance.

[0038] Based on the same inventive concept, this embodiment also provides a drying device, including a drying chamber 12, wherein the drying chamber 12 is provided with a first air inlet 13, a second air inlet 14 and a dehumidification outlet 15, and the drying chamber 12 is equipped with the aforementioned closed-loop dehumidification heat pump structure; wherein, the first air inlet 13 is connected to the air outlet of the first airflow channel 1, and the second air inlet 14 is connected to the air outlet of the second airflow channel 2.

[0039] In this embodiment, by setting a closed-loop dehumidification heat pump structure in the drying chamber 12 of the drying equipment, the heat pump can be used to dehumidify and heat the exhaust airflow, and the heat pipe heat exchanger can be used to realize the heat circulation utilization of the high-temperature exhaust airflow. This improves the efficiency of heat energy circulation while realizing closed-loop dehumidification of the drying equipment, ensuring the stability and controllability of the drying process.

[0040] In this embodiment, the drying equipment is equipped with at least two sets of the aforementioned closed-loop dehumidification heat pump structures. Each set of closed-loop dehumidification heat pump structures can operate independently or work in concert according to the humidity and temperature requirements within the drying chamber 12 to further improve drying efficiency and energy saving; in particular, it can better adapt to drying tasks of different scales and types (such as large-scale drying equipment), improving the flexibility and applicability of the equipment.

[0041] In this embodiment, the drying chamber 12 is provided with an inlet and an outlet. A multi-layer mesh belt material conveyor 17 is installed inside the drying chamber 12 to transport the material to be dried from the inlet to the outlet. The multi-layer mesh belt material conveyor 17 can continuously transport the material from the inlet to the outlet, realizing the automation and continuity of the drying process and improving production efficiency. The temperature and humidity inside the drying chamber 12 can be precisely controlled by a closed-loop dehumidification heat pump structure, ensuring the quality and stability of the dried material.

[0042] In this embodiment, the first air inlet 13 is located at the bottom of the drying chamber 12 or on the side wall near the bottom of the drying chamber 12, and the second air inlet 14 is located on the side wall of the drying chamber 12 between the exhaust port 15 and the first air inlet 13. This enables stratified air supply in the drying equipment, effectively improving the temperature uniformity and air circulation efficiency within the drying chamber 12, thereby further improving drying efficiency and drying quality.

[0043] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A closed-loop dehumidification heat pump structure, characterized in that, include: A dehumidification channel is used to connect with the dehumidification port (15) of the drying equipment. The dehumidification channel includes a first airflow channel (1) and a second airflow channel (2). The first heat pump includes a first evaporator (3) and a first condenser (4) connected by a compressor, a throttling expansion valve and a circulation pipeline; the first evaporator (3) is disposed in the exhaust channel and is used to condense and dehumidify all or part of the airflow in the exhaust channel; the first condenser (4) is disposed in the second airflow channel (2) and is used to heat the airflow entering the second airflow channel (2); The heat pipe heat exchanger includes a heat pipe evaporator (5) and a heat pipe condenser (6) that are connected to each other. The heat pipe evaporator (5) is located in a first airflow channel (1) or a second airflow channel (2) between the first evaporator (3) and the exhaust port (15). The heat pipe condenser (6) is located between the air outlet of the first evaporator (3) and the first airflow channel (1). The circulating fan (7) is used to drive the airflow discharged from the exhaust port (15) to flow through the first heat pump and heat pipe heat exchanger, and then return to the drying chamber (12) from the air outlet of the first airflow channel (1) or the second airflow channel (2).

2. The closed-loop dehumidification heat pump structure according to claim 1, characterized in that, It also includes a second heat pump, which includes a second evaporator (8) and a second condenser (9) connected by a compressor, a throttling expansion valve and a circulation pipeline. The second evaporator (8) is located in the first airflow channel (1) and is positioned between the first evaporator (3) and the heat pipe condenser (6). The second condenser (9) is located in the first airflow channel (1) and is positioned between the second evaporator (8) and the first air inlet (13).

3. The closed-loop dehumidification heat pump structure according to claim 1, characterized in that, It also includes a third heat pump, which includes a first heat exchange component (10) and a second heat exchange component (11) connected by a compressor, a throttling expansion valve and a circulation pipeline; the first heat exchange component (10) is set in the atmospheric environment and is used to absorb heat from the atmosphere or release heat to the atmospheric environment; the second heat exchange component (11) is set in a first airflow channel (1) or a second airflow channel (2) near the exhaust port (15) and is used to condense and dehumidify or heat all or part of the airflow discharged from the exhaust port (15).

4. The closed-loop dehumidification heat pump structure according to claim 1, characterized in that, The second airflow channel (2) is provided with a control valve (16) for controlling the opening or closing of the second airflow channel (2).

5. A drying apparatus, comprising a drying chamber (12), characterized in that, The drying chamber (12) is provided with a first air inlet (13), a second air inlet (14) and a dehumidification outlet (15). The drying chamber (12) is equipped with a closed dehumidification heat pump structure as described in any one of claims 1-4. The first air inlet (13) is connected to the air outlet of the first airflow channel (1), and the second air inlet (14) is connected to the air outlet of the second airflow channel (2).

6. The drying equipment according to claim 5, characterized in that, The drying equipment is equipped with at least two sets of the aforementioned closed-loop dehumidification heat pump structures.

7. The drying equipment according to claim 5, characterized in that, The drying chamber (12) is provided with a feed inlet and a discharge outlet. A multi-layer mesh belt material conveyor (17) is provided in the drying chamber (12) to transport the material to be dried from the feed inlet to the discharge outlet of the drying chamber (12).

8. The drying equipment according to claim 7, characterized in that, The first air inlet (13) is located at the bottom of the drying chamber (12) or on the side wall near the bottom of the drying chamber (12), and the second air inlet (14) is located on the side wall of the drying chamber (12) between the exhaust port (15) and the first air inlet (13).

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