Closed heat pump drying system

Abstract

The utility model discloses a closed heat pump drying system. The drying device comprises a drying box, a condenser and an evaporator are fixedly mounted at the top of the drying box, an air bellow is fixedly mounted on one side of the condenser, an air inlet pipe is fixedly mounted on one side of the air bellow, and an air outlet pipe is fixedly mounted on one side of the evaporator. The condenser and the evaporator are connected through the first communicating pipe, the second communicating pipe, the air suction pipe and the exhaust pipe to form a communicating structure, and opening and closing states of different pipelines can be achieved by controlling opening and closing of the first electric valve, the second electric valve, the third electric valve and the fourth electric valve. Therefore, switching among an open type drying system, a semi-open type drying system and a closed type drying system is achieved, drying of different products can be achieved by using one device through the switching system, the cost for building different systems and the loss of electric energy during starting each time are reduced, and therefore the production cost of the products is reduced.

Description

Technical Field

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

[0002] The heat pump drying system consists of a heat pump unit and a drying chamber, which are mutually conditional and mutually influential. The heat pump unit uses the reverse Carnot principle to transfer heat from a low-temperature heat source to the drying object. The drying chamber transfers the heated heat to the material through the drying medium to vaporize its moisture and achieve a dehumidification effect. Due to the different drying objects, there are many forms of heat pump drying systems. According to the circulation mode of the drying medium and the external environment, the heat pump drying system can be divided into three forms: open, semi-open, and closed.

[0003] The three types of existing heat pump drying systems are used separately. When different products need to be dried, they need to be placed in different types of systems for drying according to the drying requirements of different products. The construction cost of each type of heat pump drying system is high, and each time a different type of system is started, additional energy consumption will be added, resulting in higher product production costs. Utility Model Content

[0004] The purpose of the utility model is to provide a closed heat pump drying system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a closed heat pump drying system, comprising a drying box, a condenser is fixedly installed on the top of the drying box, an evaporator is fixedly installed on the top of the drying box, a bellows is fixedly installed on one side of the condenser, an air inlet pipe is fixedly installed on one side of the bellows, an air outlet pipe is fixedly installed on one side of the evaporator, a connecting pipe one is fixedly installed on one side of the condenser and the evaporator, an electric valve one is fixedly installed on the middle end of the connecting pipe one, an air intake pipe is fixedly installed on the outer wall of the connecting pipe one, an electric valve two is fixedly installed on one end of the air intake pipe, an exhaust pipe is fixedly installed on the outer wall of the connecting pipe one, an electric valve three is fixedly installed on one end of the exhaust pipe, a connecting pipe two is fixedly installed on the outer wall of the air outlet pipe and the condenser, and an electric valve four is fixedly installed on one end of the connecting pipe two.

[0006] By adopting the above technical solution, the condenser and the evaporator are connected by connecting pipe 1, connecting pipe 2, suction pipe and exhaust pipe to form a connecting structure. By controlling the opening and closing of electric valve 1, electric valve 2, electric valve 3 and electric valve 4, the opening and closing states of different pipelines can be realized, thereby achieving mutual switching between an open drying system, a semi-open drying system and a closed drying system.

[0007] Preferably, a compressor is fixedly mounted on the outer wall of the drying box, a high-pressure air pipe is fixedly connected to one side of the compressor, the other end of the high-pressure air pipe is fixedly connected to one side of the condenser, a low-pressure air pipe is fixedly connected to the other side of the compressor, and the other end of the low-pressure air pipe is fixedly connected to one side of the evaporator.

[0008] By adopting the above technical solution, the gas can be compressed into a high-pressure and high-temperature liquid by the compressor, and changed into a medium-temperature and high-pressure liquid after entering the condenser. The evaporator can circulate the low-temperature and low-pressure gas back to the compressor, and the air in the condenser and evaporator can be heated and cooled.

[0009] Preferably, the relative outer walls of the condenser and the evaporator are fixedly connected with water pipes, the middle end of the water pipe is fixedly installed with a diverter valve, and together with the compressor, the high-pressure air pipe and the low-pressure air pipe, a heat pump system structure is formed.

[0010] By adopting the above technical solution, the medium-temperature and high-pressure liquid in the condenser can form a low-temperature and low-pressure liquid after passing through the diverter valve, which is convenient for the evaporator to convert the liquid into a low-temperature and low-pressure gas, thereby forming a heat pump system structure for drying the circulating gas for heating and cooling.

[0011] Preferably, the electric valve 1 and the electric valve 4 are in a closed state, and the electric valve 2 and the electric valve 3 are in an open state, and together with the condenser, the evaporator, the bellows, the air inlet pipe, the air outlet pipe, the connecting pipe 1 and the connecting pipe 2 constitute an open drying system.

[0012] By adopting the above technical solution, when electric valve 1 and electric valve 4 are closed, the condenser draws in external air from the intake pipe for heating and drying. The circulating gas is cooled by the evaporator to discharge the condensed water, and then the air is discharged from the exhaust pipe, so that the entire structure becomes an open drying system, which is convenient for drying processing of products suitable for the system.

[0013] Preferably, the electric valve 1 and the electric valve 3 are in a closed state, and the electric valve 2 and the electric valve 4 are in an open state, and together with the condenser, the evaporator, the bellows, the air inlet pipe, the air outlet pipe, the connecting pipe 1 and the connecting pipe 2 constitute a semi-open drying system structure.

[0014] By adopting the above technical solution, when the electric valve 1 and the electric valve 3 are closed, the outside air is sucked into the condenser through the intake pipe for heating. After drying, part of the gas enters the condenser through the connecting pipe 2 for reheating and use, and the other part of the air is cooled through the evaporator and discharged from the exhaust pipe, so that the whole structure is changed into a semi-open drying system, which is convenient for drying processing of products suitable for the system.

[0015] Preferably, the electric valve 1 is in an open state, and the electric valves 2, 3 and 4 are in a closed state, and together with the condenser, evaporator, bellows, air inlet pipe, air outlet pipe, connecting pipe 1 and connecting pipe 2 constitute a closed drying system structure.

[0016] By adopting the above technical solution, when only electric valve 1 is in the open state, the air circulates only in the condenser, evaporator and drying box. The circulating hot air dries the product and switches the overall structure into a closed drying system, which is convenient for drying processing of products suitable for the system.

[0017] Preferably, the air inlet pipe and the exhaust pipe are pipes with rectangular cross-sections, and the connecting pipe 1 and the connecting pipe 2 are circular pipes with circular cross-sections.

[0018] By adopting the above technical solution, by designing the air inlet pipe and the exhaust pipe into thicker rectangular channels, the hot air with a fixed wind speed can be discharged slowly into the drying box, avoiding the problem of the product drying faster and causing cracks due to the faster discharge of hot air from a thinner round pipe. At the same time, the connecting pipe 1 and the connecting pipe are round pipes, which facilitates the rapid transportation of gas.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) The condenser and the evaporator are connected to form a connecting structure by using a connecting pipe 1, a connecting pipe 2, an air intake pipe and an air exhaust pipe. By controlling the opening and closing of the electric valve 1, the electric valve 2, the electric valve 3 and the electric valve 4, the opening and closing states of different pipes can be realized, thereby achieving the switching between the open, semi-open and closed drying systems. By switching the system, one device can be used to achieve drying for different products, reducing the cost of building different systems and the loss of electric energy each time it is started, thereby reducing the cost of product production;

[0021] (2) By using electric valves to connect the pipelines, electric valve 1, electric valve 2, electric valve 3 and electric valve 4 can be connected through a controller and a line, and the closing of each valve can be controlled at the same time, so as to achieve the effect of quickly switching different drying systems and improve the working efficiency of drying products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of the overall structure of the device of the utility model;

[0023] Figure 2 It is a top view of the overall structure of the device of the utility model;

[0024] Figure 3 This is a top view of the drying system structure of the utility model;

[0025] Figure 4This is a schematic diagram of the drying system structure of the utility model.

[0026] In the figure: 1. Drying box; 2. Condenser; 3. Evaporator; 4. Bellows; 5. Inlet pipe; 6. Outlet pipe; 7. Connecting pipe 1; 8. Electric valve 1; 9. Intake pipe; 10. Electric valve 2; 11. Exhaust pipe; 12. Electric valve 3; 13. Connecting pipe 2; 14. Electric valve 4; 15. Compressor; 16. High-pressure air pipe; 17. Low-pressure air pipe; 18. Water pipe; 19. Diverter valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The following is combined with Figure 1-4 The utility model is described in further detail.

[0029] See also Figures 1 to 4The utility model provides an embodiment: a closed heat pump drying system, including a drying box 1, a condenser 2 is fixedly installed on the top of the drying box 1, the condenser 2 is used to heat the air to dry the product, an evaporator 3 is fixedly installed on the top of the drying box 1, the evaporator 3 is used to cool the air and condense the moisture in the air, a bellows 4 is fixedly installed on one side of the condenser 2, the bellows 4 is used to guide the flow of air in the pipeline, an air inlet pipe 5 is fixedly installed on one side of the bellows 4, the air inlet pipe 5 guides the heated air into the drying box 1 to dry the product, an air outlet pipe 6 is fixedly installed on one side of the evaporator 3, the air outlet pipe 6 discharges the air with water vapor after drying out of the drying box 1, a connecting pipe 7 is fixedly installed on one side of the condenser 2 and the evaporator 3, the connecting pipe 7 is used to connect the condenser 2 and the evaporator 3 to facilitate the exchange of gas between them, and the connecting pipe An electric valve 18 is fixedly installed on the middle end of a connecting pipe 7, an air intake pipe 9 is fixedly installed on the outer wall of the connecting pipe 7, an electric valve 2 10 is fixedly installed on one end of the air intake pipe 9, an exhaust pipe 11 is fixedly installed on the outer wall of the connecting pipe 7, an electric valve 3 12 is fixedly installed on one end of the exhaust pipe 11, a connecting pipe 2 13 is fixedly installed on the outer walls of the outlet pipe 6 and the condenser 2, and an electric valve 4 14 is fixedly installed on one end of the connecting pipe 2 13. By controlling the opening and closing of the electric valve 18, the electric valve 2 10, the electric valve 3 12 and the electric valve 4 14, the opening and closing states of different pipelines can be realized, thereby achieving switching between open, semi-open and closed drying systems. By switching the system, one device can be used to achieve drying for different products, reducing the cost of building different systems and the loss of electric energy each time they are started, thereby reducing the cost of product production.

[0030] See also Figures 1 to 4A compressor 15 is fixedly installed on the outer wall of the drying box 1. The gas can be compressed into a high-pressure and high-temperature liquid through the compressor 15. A high-pressure air pipe 16 is fixedly connected to one side of the compressor 15. The other end of the high-pressure air pipe 16 is fixedly connected to one side of the condenser 2. A low-pressure air pipe 17 is fixedly connected to the other side of the compressor 15. The other end of the low-pressure air pipe 17 is fixedly connected to one side of the evaporator 3. The high-pressure and high-temperature air enters the condenser 2 and changes into a medium-temperature and high-pressure liquid. The evaporator 3 can circulate the low-temperature and low-pressure gas back into the compressor 15, and can heat and cool the air in the condenser 2 and the evaporator 3. A water pipe 18 is fixedly connected to the relative outer walls of the condenser 2 and the evaporator 3. A diverter valve 19 is fixedly installed at the middle end of the water pipe 18. The medium-temperature and high-pressure liquid of the condenser 2 will form a Low-temperature and low-pressure liquid, and together with the compressor 15, the high-pressure air pipe 16 and the low-pressure air pipe 17, constitute a heat pump system structure. The evaporator 3 changes the liquid into a low-temperature and low-pressure gas, so that the structure constitutes a heat pump system structure, which is used to heat and cool the circulating gas for drying processing. The electric valve 1 8 and the electric valve 4 14 are in a closed state, the electric valve 2 10 and the electric valve 3 12 are in an open state, and together with the condenser 2, the evaporator 3, the bellows 4, the air inlet pipe 5, the air outlet pipe 6, the connecting pipe 1 7 and the connecting pipe 2 13, constitute an open drying system. The condenser 2 inhales external air from the intake pipe 9 for heating and drying. The circulating gas will be cooled by the evaporator 3 to discharge the condensed water, and then the air will be discharged from the exhaust pipe 11, so that the entire structure becomes an open drying system, which is convenient for the products suitable for the system to be dried.

[0031] See also Figures 1 to 4, the electric valve one 8 and the electric valve three 12 are in the closed state, the electric valve two 10 and the electric valve four 14 are in the open state, and together with the condenser 2, the evaporator 3, the bellows 4, the air inlet pipe 5, the air outlet pipe 6, the connecting pipe one 7 and the connecting pipe two 13 constitute a semi-open drying system structure, the air intake pipe 9 inhales external air into the condenser 2 for heating, and after drying, a part of the gas enters the condenser 2 through the connecting pipe two 13 for reheating and use, and the other part of the air is cooled through the evaporator 3 and discharged from the exhaust pipe 11, so that the whole structure is changed into a semi-open drying system, which is convenient for drying processing of products suitable for the system, the electric valve one 8 is in the open state, the electric valve two 10, the electric valve three 12 and the electric valve four 14 are in the closed state, and together with the condenser 2, the evaporator 3, the bellows 4, the air inlet pipe 5, the air outlet pipe 6, the connecting pipe one 7 and the connecting pipe two 13 5. The air outlet pipe 6, the connecting pipe 1 7 and the connecting pipe 2 13 together constitute a closed drying system structure. When only the electric valve 1 8 is in the open state, the air is circulated only in the condenser 2, the evaporator 3 and the drying box 1. The circulating hot air will dry the product so that the overall structure is switched to a closed drying system, which is convenient for drying the products suitable for the system. The air inlet pipe 5 and the exhaust pipe 11 are pipes with rectangular cross-sections. The air inlet pipe 5 and the exhaust pipe 11 are designed as thicker rectangular channels, which can discharge hot air with a fixed wind speed slowly into the drying box 1, avoiding the problem of faster drying and cracking of the product caused by faster discharge of hot air from thinner circular pipes. The connecting pipe 1 7 and the connecting pipe 2 13 are circular pipes with circular cross-sections. The connecting pipe 1 7 and the connecting pipe 2 13 are circular pipes for rapid gas transportation.

[0032] Working principle: When in use, the electric valve 1 8 and the electric valve 4 14 are closed, and the electric valve 2 10 and the electric valve 3 12 are opened, the condenser 2 inhales the external air from the air intake pipe 9 for heating and drying, and the circulating gas is cooled by the evaporator 3 to discharge the condensed water, and then the air is discharged from the exhaust pipe 11, so that the whole structure becomes an open drying system;

[0033] Secondly, when the electric valve 1 8 and the electric valve 3 12 are closed and the electric valve 2 10 and the electric valve 4 14 are opened, the air intake pipe 9 inhales the outside air into the condenser 2 for heating. After drying, a part of the gas enters the condenser 2 through the connecting pipe 2 13 for reheating and use, and the other part of the air is cooled through the evaporator 3. The cooled air is discharged through the exhaust pipe 11, so that the whole structure is changed into a semi-open drying system.

[0034] Finally, when only the electric valve 8 is in the open state, the air circulates only in the condenser 2, the evaporator 3 and the drying box 1, and the circulating hot air dries the product so that the overall structure is switched to a closed drying system.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention.

Claims

1. A closed heat pump drying system, comprising a drying box, characterized in that: A condenser is fixedly installed on the top of the drying box, an evaporator is fixedly installed on the top of the drying box, a bellows is fixedly installed on one side of the condenser, an air inlet pipe is fixedly installed on one side of the bellows, an air outlet pipe is fixedly installed on one side of the evaporator, a connecting pipe one is fixedly installed on one side of the condenser and the evaporator, an electric valve one is fixedly installed on the middle end of the connecting pipe one, an air intake pipe is fixedly installed on the outer wall of the connecting pipe one, an electric valve two is fixedly installed on one end of the air intake pipe, an exhaust pipe is fixedly installed on the outer wall of the connecting pipe one, an electric valve three is fixedly installed on one end of the exhaust pipe, a connecting pipe two is fixedly installed on the outer wall of the air outlet pipe and the condenser, and an electric valve four is fixedly installed on one end of the connecting pipe two.

2. A closed heat pump drying system according to claim 1, characterized in that: A compressor is fixedly installed on the outer wall of the drying box, one side of the compressor is fixedly connected to a high-pressure air pipe, the other end of the high-pressure air pipe is fixedly connected to one side of the condenser, the other side of the compressor is fixedly connected to a low-pressure air pipe, the other end of the low-pressure air pipe is fixedly connected to one side of the evaporator.

3. A closed heat pump drying system according to claim 2, characterized in that: The relative outer walls of the condenser and the evaporator are fixedly connected with water pipes, the middle end of the water pipe is fixedly installed with a diverter valve, and together with the compressor, the high-pressure air pipe and the low-pressure air pipe, a heat pump system structure is formed.

4. A closed heat pump drying system according to claim 1, characterized in that: The electric valve 1 and the electric valve 4 are in a closed state, the electric valve 2 and the electric valve 3 are in an open state, and together with the condenser, the evaporator, the bellows, the air inlet pipe, the air outlet pipe, the connecting pipe 1 and the connecting pipe 2, they constitute an open drying system.

5. A closed heat pump drying system according to claim 1, characterized in that: The electric valve 1 and the electric valve 3 are in a closed state, the electric valve 2 and the electric valve 4 are in an open state, and together with the condenser, the evaporator, the bellows, the air inlet pipe, the air outlet pipe, the connecting pipe 1 and the connecting pipe 2 form a semi-open drying system structure.

6. A closed heat pump drying system according to claim 1, characterized in that: The electric valve 1 is in an open state, and the electric valves 2, 3 and 4 are in a closed state, and together with the condenser, the evaporator, the bellows, the air inlet pipe, the air outlet pipe, the connecting pipe 1 and the connecting pipe 2 form a closed drying system structure.

7. A closed heat pump drying system according to claim 1, characterized in that: The air inlet pipe and the exhaust pipe are pipes with rectangular cross sections, and the connecting pipe 1 and the connecting pipe 2 are circular pipes with circular cross sections.

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