Heat storage type drying equipment

Abstract

The invention relates to the technical field of clothes treatment, in particular to heat storage type drying equipment, and aims to solve the problems that a heat pump type clothes dryer is high in power consumption and heat loss and causes energy waste. Therefore, the heat storage type drying equipment comprises a drying cylinder, an air duct, a heat pump system and an energy storage device. The drying cylinder is provided with an air inlet and an air outlet; the air outlet end of the air duct is communicated with the air inlet, and the air inlet end of the air duct is communicated with the air outlet; the heat pump system is mounted in the air duct, and the heat pump system can dry and heat air from the air inlet end of the air duct and convey hot air into the drying cylinder; the energy storage device is in heat exchange connection with the heat pump system so as to store heat generated by the heat pump system and / or release the heat to the heat pump system. Through the arrangement, the heat storage type drying equipment provided by the invention can recover and release heat, so that heat loss and energy consumption are reduced, and resources are effectively saved.

Description

Technical Field

[0001] This invention relates to the field of clothing processing technology, specifically providing a heat storage drying device. Background Technology

[0002] A heat pump dryer's drying process can be broken down into two parts: moisture evaporation and condensation. Air is heated into dry, hot air by the heat pump system's condenser. This dry, hot air passes through the wet clothes, where the moisture absorbs heat, becoming humid, hot air. This humid, hot air then passes through the heat pump system's evaporator and is transformed into dry, cool air, where the water vapor condenses into water droplets and is expelled. Subsequently, this dry, cool air is reheated by the condenser, participating in the drying process repeatedly until the wet clothes are completely dry.

[0003] Existing heat pump dryer refrigeration systems are closed-loop systems because the airflow passes sequentially through the evaporator and condenser. The heat inside the dryer comes from the compressor's power consumption, resulting in a slow heating rate. To address this issue, some solutions use auxiliary electric heating to increase the system's heat output, but this increases energy consumption and reduces energy efficiency. Other solutions use a second evaporator outside the system to absorb heat from the surrounding environment and transfer it into the system, but this lowers the ambient temperature and poses a risk of condensation, negatively impacting the user's environment. Furthermore, after each drying cycle, the internal heat is released into the user's room, causing temperature fluctuations and wasting energy.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems of high power consumption and high heat loss in existing heat pump dryers, which result in energy waste.

[0006] This invention provides a heat storage drying device, comprising:

[0007] A drying cylinder having an air inlet and an air outlet;

[0008] The air duct has an air outlet that is connected to the air inlet, and the air inlet that is connected to the air outlet.

[0009] A heat pump system, installed in the air duct, capable of drying and heating air from the air inlet of the air duct and delivering hot air into the drying cylinder; and

[0010] An energy storage device is heat-exchangeably connected to the heat pump system to store the heat generated by the heat pump system and / or release the heat to the heat pump system.

[0011] In the preferred technical solution of the above-mentioned thermal storage drying equipment, the energy storage device includes a box, a thermal storage mechanism and a heat exchanger. The thermal storage mechanism is disposed in the box, and the heat exchanger is heat-exchangeably connected to the thermal storage mechanism. A first solenoid valve and a second solenoid valve are respectively disposed at both ends of the heat exchanger, and the two ends of the heat exchanger are respectively connected to the heat pump system through the first solenoid valve and the second solenoid valve.

[0012] In the preferred embodiment of the above-mentioned heat storage drying equipment, the heat storage mechanism includes a heat storage tank and a heat storage body filled in the heat storage tank, and the heat storage body covers the heat exchanger.

[0013] In the preferred technical solution of the above-mentioned heat storage drying equipment, the heat storage body is a spatiotemporal phase change material.

[0014] In the preferred embodiment of the above-mentioned thermal storage drying equipment, the heat exchanger is a heat exchange tube, which is installed in the thermal storage tank.

[0015] In the preferred technical solution of the above-mentioned heat storage drying equipment, the heat exchange tube is a serpentine copper tube.

[0016] In the preferred technical solution of the above-mentioned heat storage drying equipment, a plurality of fins are spaced apart on the heat exchange tube, one end of the fins is fixedly connected to the heat exchange tube, and the other end extends into the heat storage body.

[0017] In the preferred embodiment of the above-mentioned heat storage drying equipment, the inner surface and / or outer surface of the box are provided with heat insulation material.

[0018] In the preferred embodiment of the above-mentioned heat storage drying equipment, the heat pump system includes a compressor, a condenser, and an evaporator. The heat exchanger is connected in series between the condenser and the evaporator. The inlet of the condenser is connected to the outlet of the compressor. The outlet of the condenser is connected to the inlet of the heat exchanger through a first solenoid valve. The outlet of the heat exchanger is connected to the inlet of the evaporator through a second solenoid valve. The outlet of the evaporator is connected to the inlet of the compressor.

[0019] In the preferred embodiment of the above-mentioned heat storage drying equipment, a fan is also provided in the air duct, and the fan is located between the condenser and the air inlet.

[0020] Those skilled in the art will understand that the technical solution of the present invention provides a heat storage drying device, including a drying drum, an air duct, a heat pump system, and an energy storage device. The drying drum has an air inlet and an air outlet; the air outlet of the air duct is connected to the air inlet, and the air inlet of the air duct is connected to the air outlet; the heat pump system is installed in the air duct, and the heat pump system can dry and heat the air from the air inlet of the air duct and deliver hot air into the drying drum; the energy storage device is heat-exchangeably connected to the heat pump system to store the heat generated by the heat pump system and / or release heat to the heat pump system. By adopting the above technical solution, the present invention can store the heat generated by the heat pump system in the energy storage device at the end of the clothes drying process, preventing heat loss and achieving the effect of reducing heat loss; when the clothes drying process starts, the energy storage device releases the stored heat to heat the air, enabling the air to heat up quickly and effectively reducing the energy consumption of the heat pump system. Specifically, the heat pump system heats the air and delivers it into the drying drum through an air duct to dry clothes. After heat exchange, the hot air becomes humid air and enters the air duct through the outlet. The heat pump system then cools and dehumidifies the humid air, turning it into dry air. This dry air is then reheated by the heat pump system and enters the drying drum again, repeating the cycle until the clothes are dry. When the heat storage drying equipment is about to finish operating, the air in the drying drum is still at a high temperature. This portion of air enters the air duct and is absorbed by the heat pump system, exchanging heat with the energy storage device and storing the heat. The heat pump system then stops operating. This not only lowers the temperature in the drying drum, preventing burns to users, but also recovers heat, reducing heat loss. When the thermal storage drying equipment is restarted, the heat pump system starts up and exchanges heat with the energy storage device. The heat stored in the heat pump system is used to heat the air. Thus, when the thermal storage drying equipment is initially started, the heat in the energy storage device can be used to quickly heat the air, so as to achieve rapid temperature rise of the drying drum and effectively reduce the energy consumption of the heat pump system.

[0021] Furthermore, the energy storage device of the present invention includes a housing, a heat storage mechanism, and a heat exchanger. The heat storage mechanism is disposed within the housing, and the heat exchanger is heat-exchangeably connected to the heat storage mechanism. A first solenoid valve and a second solenoid valve are respectively disposed at both ends of the heat exchanger, and both ends of the heat exchanger are connected to a heat pump system via the first and second solenoid valves, respectively. This structural design improves the heat exchange efficiency between the energy storage device and the heat pump system, effectively reducing heat loss.

[0022] Furthermore, the heat storage mechanism includes a heat storage tank and a heat storage body filled in the heat storage tank, with the heat storage body covering the heat exchanger. This structural arrangement increases the contact area between the heat exchanger and the heat storage mechanism, thereby improving the heat exchange effect between the heat exchanger and the heat storage mechanism and further reducing heat loss.

[0023] Furthermore, the heat exchanger of the present invention is a heat exchange tube, which is inserted into the heat storage tank. This arrangement can improve the thermal conductivity of the heat exchanger and increase the heat exchange efficiency between the heat exchanger and the heat storage body.

[0024] Furthermore, the heat exchange tube is a serpentine copper tube. This design allows the heat exchange tube to be arranged in an S-shaped curve within the heat storage medium, thereby further increasing the contact area between the heat exchanger and the heat storage medium and improving the heat exchange efficiency.

[0025] Furthermore, the heat exchanger tube is provided with multiple fins spaced apart, with one end of the fins fixedly connected to the heat exchanger tube and the other end extending into the heat storage body. This structural design enables heat conduction through the fins, transferring heat between the heat exchanger tube and the heat storage body, thereby improving the heat transfer efficiency between the heat exchanger tube and the heat storage body and helping to reduce heat loss.

[0026] Furthermore, the heat pump system includes a compressor, a condenser, and an evaporator. A heat exchanger is connected in series between the condenser and the evaporator. The inlet of the condenser is connected to the outlet of the compressor. The outlet of the condenser is connected to the inlet of the heat exchanger via a first solenoid valve. The outlet of the heat exchanger is connected to the inlet of the evaporator via a second solenoid valve. The outlet of the evaporator is connected to the inlet of the compressor. With this configuration, when the heat storage drying equipment finishes operating, the refrigerant in the compressor flows sequentially through the condenser, the energy storage device, and the evaporator through the compressor outlet, and then returns to the compressor. By controlling the first solenoid valve to be fully open and the second solenoid valve to be partially open, the refrigerant absorbs heat from the drying drum and stores this heat in the energy storage device through the heat exchanger, thus lowering the temperature in the drying drum. When the heat storage drying equipment starts, the refrigerant in the compressor flows sequentially through the condenser, the energy storage device, and the evaporator through the compressor outlet, and then returns to the compressor. By controlling the first solenoid valve to be partially open and the second solenoid valve to be fully open, the refrigerant absorbs heat from the energy storage device to heat the air, enabling the drying drum to heat up rapidly and saving energy consumption of the heat pump system. Attached Figure Description

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0028] Figure 1 This is a schematic diagram of the heat storage drying equipment of the present invention.

[0029] List of reference numerals in the attached diagram:

[0030] 1. Drying drum; 11. Air inlet; 12. Air outlet;

[0031] 2. Air duct; 21. Fan;

[0032] 3. Heat pump system; 31. Compressor; 32. Condenser; 33. Evaporator;

[0033] 4. Energy storage device; 41. Housing; 42. Thermal storage mechanism; 43. Heat exchanger; 44. First solenoid valve; 45. Second solenoid valve. Detailed Implementation

[0034] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. For example, although the following embodiments are described in conjunction with a heat pump dryer, the heat storage drying equipment provided by the present invention is equally applicable to other products that require solutions to reduce heat loss.

[0035] It should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] As noted in the background section, existing heat pump dryers suffer from high power consumption and significant heat loss, resulting in energy waste. This invention provides a heat storage drying device that uses an energy storage device to store and release waste heat, effectively solving the problems of high heat loss and high energy consumption in heat pump dryers.

[0037] Reference Figure 1 , Figure 1 This is a schematic diagram of the heat storage drying equipment of the present invention.

[0038] like Figure 1 As shown, the present invention provides a heat storage drying device, including a drying cylinder 1, an air duct 2, a heat pump system 3, and an energy storage device 4. The drying cylinder 1 has an air inlet 11 and an air outlet 12; the air outlet of the air duct 2 is connected to the air inlet 11, and the air inlet of the air duct 2 is connected to the air outlet 12; the heat pump system 3 is installed in the air duct 2, and the heat pump system 3 can dry and heat the air from the air inlet of the air duct 2 and deliver hot air into the drying cylinder 1; the energy storage device 4 is heat-exchange connected to the heat pump system 3 to store and release the heat generated by the heat pump system 3 to the heat pump system 3.

[0039] The heat storage drying equipment provided by this invention heats the air through a heat pump system 3 and delivers hot air into the drying drum 1 through the air duct 2 for drying clothes. After heat exchange, the hot air becomes humid air and enters the air duct 2 through the air outlet 12. Then, through the cooling and dehumidification effect of the heat pump system 3, the humid air becomes dry air. Subsequently, the dry air is heated again by the heat pump system 3 to become hot air and enters the drying drum 1. This cycle continues until the clothes in the drying drum 1 are dried. Through this cycle, when the heat storage drying equipment is about to finish working, the air in the drying drum 1 is still at a high temperature and requires a relatively long time to dissipate heat before the user can take out the clothes. Moreover, the residual heat is released into the user's room, causing changes in the user's home environment temperature. To address this, the present invention incorporates an energy storage device 4, which is heat-exchangeably connected to a heat pump system 3. When the thermal storage drying equipment is about to finish its operation, hot air from the drying cylinder 1 enters the air duct 2 and is absorbed by the refrigerant in the heat pump system 3, causing the refrigerant's temperature to rise. This lowers the temperature in the drying cylinder 1, preventing burns to the user. The high-temperature refrigerant then exchanges heat with the energy storage device 4, absorbing its heat and lowering its temperature. Thus, the heat in the drying cylinder 1 is transferred to the energy storage device 4 for temporary storage, achieving heat recovery and reducing heat loss. When the thermal storage drying equipment restarts, the heat pump system 3 is activated. The refrigerant in the heat pump system 3 exchanges heat with the energy storage device 4 again, absorbing and carrying away the heat stored in the energy storage device 4 to heat the air. Therefore, during initial startup, the thermal storage drying equipment can rapidly heat the air using the heat stored in the energy storage device 4, achieving rapid temperature rise in the drying cylinder 1 and effectively reducing the energy consumption of the heat pump system 3. Therefore, the heat storage drying equipment provided by the present invention can reduce heat loss and energy consumption of the heat pump system 3, effectively saving resources.

[0040] Preferably, such as Figure 1 As shown, the energy storage device 4 includes a housing 41, a heat storage mechanism 42, and a heat exchanger 43. The heat storage mechanism 42 is disposed in the housing 41. The heat exchanger 43 is heat-exchange connected to the heat storage mechanism 42. A first solenoid valve 44 and a second solenoid valve 45 are respectively provided at both ends of the heat exchanger 43. The two ends of the heat exchanger 43 are connected to the heat pump system 3 through the first solenoid valve 44 and the second solenoid valve 45 respectively.

[0041] For example, such as Figure 1As shown, with the above configuration, the refrigerant in the heat pump system 3 flows through the energy storage device 4, sequentially passing through the first solenoid valve 44, the heat exchanger 43, and the second solenoid valve 45. When the heat storage drying equipment is about to finish operating, hot air in the drying cylinder 1 enters the air duct 2 and absorbs the heat from this portion of air through the refrigerant in the heat pump system 3, raising the temperature of the refrigerant. Then, by controlling the first solenoid valve 44 to fully open and the second solenoid valve 45 to partially open (acting as a throttling device), the flow rate of the high-temperature refrigerant is limited by the second solenoid valve 45, reducing the pressure and releasing heat. The released heat is transferred to the heat storage mechanism 42 through the heat exchanger 43 for storage, thus recovering the heat from the drying cylinder 1. When the temperature in the drying cylinder 1 drops to a preset value, the heat pump system 3 stops operating. When the heat storage drying equipment starts working, the first solenoid valve 44 is partially opened and the second solenoid valve 45 is fully opened. The first solenoid valve 44 acts as a throttling device. As a result, when the refrigerant in the heat pump system 3 flows through the first solenoid valve 44 into the heat exchanger 43, the flow rate of the refrigerant is limited by the first solenoid valve 44, the pressure decreases, and the temperature also decreases. The low-temperature refrigerant flows through the heat exchanger 43 and absorbs and carries away the heat from the heat storage structure to heat the air, thereby reducing the energy consumption of the heat pump system 3 and effectively saving resources.

[0042] Preferably, the heat storage mechanism 42 includes a heat storage tank and a heat storage body filled in the heat storage tank, with the heat storage body covering the heat exchanger 43.

[0043] The heat storage tank provides installation space for the heat storage body, preventing it from shifting and causing poor contact between the heat storage body and the heat exchanger 43, thus affecting the heat transfer effect. Covering the heat exchanger 43 with the heat storage body increases the contact area between the heat exchanger 43 and the heat storage body, resulting in better heat exchange and further reducing heat loss.

[0044] Specifically, the heat storage tank of the present invention is made of insulation material, such as rock wool sandwich insulation board, plastic board, etc., thereby improving the heat preservation capacity of the heat storage body and preventing heat loss in the heat storage body. Furthermore, in other embodiments, the heat storage tank can also be made of other polymer materials or other insulation materials, such as high-foaming polypropylene, polystyrene foam, etc. The specific material of the heat storage tank is not specifically limited in the present invention, as long as it can meet the heat preservation requirements of the heat storage body.

[0045] Preferably, the heat storage body is a spatiotemporal phase-change material.

[0046] It should be noted that, due to the characteristics of long-term stable storage and controllable release of latent heat, space-time phase-change materials can absorb or release a large amount of latent heat during phase transitions while maintaining a constant system temperature. They can stably maintain a supercooled energy storage state at room temperature for more than two months. Furthermore, the stored latent heat can be controllably released through simple thermal initiation and mechanical triggering. The cold crystallization enthalpy of space-time phase-change materials can reach 200 J / g, and the released latent heat can heat the system from room temperature to 60°C, exhibiting excellent long-term thermal energy storage and controllable release performance. Therefore, space-time phase-change materials can meet the requirements of this invention for heat storage and release with good results.

[0047] Preferably, the heat exchanger 43 is a heat exchange tube, which is inserted into the heat storage tank. Because heat exchange tubes have high heat transfer efficiency, can quickly transfer heat, provide precise temperature control, have a simple structure, good reliability, and a long service life, they can improve the thermal conductivity of the heat exchanger 43, further improve the heat exchange efficiency between the heat exchanger 43 and the heat storage body, and reduce heat loss.

[0048] Preferably, the heat exchange tube is a serpentine copper tube.

[0049] It should be noted that in the convective heat exchange between heat exchanger 43 and heat pump system 3, the refrigerant flows through the heat exchange tubes, exchanging heat with the refrigerant through the tube walls, thereby transferring heat from the heat storage medium to the refrigerant or transferring heat from the refrigerant to the heat storage medium for storage. This invention designs the heat exchange tubes in a serpentine shape, which creates strong turbulence as the refrigerant flows within the tubes, further improving the heat transfer efficiency between heat exchanger 43 and the heat storage medium. Furthermore, the heat exchange tubes are made of copper, which has a relatively high thermal conductivity, further enhancing the heat exchange efficiency between heat exchanger 43 and the heat storage medium.

[0050] Specifically, the heat exchanger tube is either coiled or folded and covered by the heat storage body, or the heat exchanger tube comprises multiple branch tubes connected in parallel and covered by the heat storage body. Furthermore, the heat exchanger tube can also contact the heat storage body in other ways. The specific form of the heat exchanger tube is not specifically limited in this invention, as long as it satisfies the requirement of sufficient heat exchange between the heat exchanger tube and the heat storage body. Moreover, the material of the heat exchanger tube can also be silver, aluminum, or other materials, as long as it meets the thermal conductivity requirements. The specific material of the heat exchanger tube is also not specifically limited in this invention.

[0051] Preferably, the heat exchanger tube is provided with multiple fins spaced apart, with one end of the fins fixedly connected to the heat exchanger tube and the other end covering the heat storage body. With this structure, heat can be conducted through the fins, transferring heat between the heat exchanger tube and the heat storage body, thereby further improving the heat transfer efficiency between the heat exchanger tube and the heat storage body.

[0052] Preferably, the inner and / or outer surfaces of the housing 41 are provided with thermal insulation material. This provides thermal insulation for the energy storage device 4, reducing heat loss. Specifically, in this invention, both the inner and outer surfaces of the housing 41 are provided with thermal insulation material, which can be polyurethane foam, expanded polystyrene board, rock wool board, etc. The specific material of the thermal insulation material is not limited in this invention.

[0053] Specifically, such as Figure 1 As shown, the heat pump system 3 includes a compressor 31, a condenser 32, and an evaporator 33. A heat exchanger 43 is connected in series between the condenser 32 and the evaporator 33. The inlet of the condenser 32 is connected to the outlet of the compressor 31. The outlet of the condenser 32 is connected to the inlet of the heat exchanger 43 through a first solenoid valve 44. The outlet of the heat exchanger 43 is connected to the inlet of the evaporator 33 through a second solenoid valve 45. The outlet of the evaporator 33 is connected to the inlet of the compressor 31.

[0054] The working principle of the heat storage drying equipment provided by this invention is as follows:

[0055] When the heat storage drying equipment is about to finish working, the first solenoid valve 44 is fully open, and the second solenoid valve 45 is partially open, acting as a throttling device. Hot air in the drying cylinder 1 enters the air duct 2 and flows to the evaporator 33. The refrigerant absorbs heat as it passes through the evaporator 33, absorbing the heat from the hot air in the drying cylinder 1 and becoming a low-temperature, low-pressure gas. The compressor 31 is in operation, and the refrigerant passes through the compressor 31 to become a high-pressure gas. Then, it passes through the condenser 32 to release heat and become a high-pressure liquid. The refrigerant in its high-pressure liquid state is throttled by the second solenoid valve 45, limiting its flow rate, becoming a low-temperature, low-pressure liquid, and releasing heat. This heat is transferred to the heat exchanger 43 and then to the heat storage medium for storage. At this time, the heat exchanger 43 acts as the condenser 32, releasing the heat from the refrigerant and transferring it to the heat storage medium. The refrigerant after heat exchange then enters the evaporator 33 to absorb heat, absorbing the heat from the hot air in the drying cylinder 1. This cycle continues until the temperature in the drying drum 1 drops to the preset temperature, at which point the compressor 31 stops working.

[0056] It should be noted that during the above stages, although the compressor 31 is working, the refrigerant will still dissipate heat when passing through the condenser 32, and the heat will be transferred to the drying cylinder 1. However, since the present invention is equipped with an energy storage device 4, the heat that the energy storage device 4 can absorb will be greater than the heat dissipated by the condenser 32. Therefore, in the continuous cycle, the temperature in the drying cylinder 1 will continuously decrease, which can achieve the purpose of reducing the temperature of the drying cylinder 1 and recovering heat.

[0057] Furthermore, when the temperature in the drying drum 1 drops to a preset temperature, the compressor 31 stops working. This preset temperature is 30-40 degrees Celsius. In other embodiments, this preset temperature may be lower than 30 degrees Celsius or higher than 40 degrees Celsius. The specific preset temperature can be determined according to the heat storage capacity of the heat storage body, and this invention does not impose a specific limitation.

[0058] When the thermal storage drying equipment starts working, the first solenoid valve 44 is partially open, and the second solenoid valve 45 is fully open. The first solenoid valve 44 acts as a throttling device. The compressor 31 operates, and the refrigerant is compressed into a high-temperature gas. It then passes through the condenser 32, releasing heat and becoming a high-pressure liquid. The refrigerant in this high-pressure liquid state is then throttled by the first solenoid valve 44, limiting its flow and turning it into a low-temperature, low-pressure liquid. This low-temperature, low-pressure liquid refrigerant flows through the heat exchanger 43, absorbing and carrying away heat from the heat storage medium. At this time, the heat exchanger 43 acts as an evaporator 33, absorbing heat from the heat storage medium and transferring it to the refrigerant. Part of the refrigerant becomes a low-temperature, low-pressure gas, which then enters the evaporator 33 for evaporation and heat absorption. Essentially all of the refrigerant is transformed into a low-temperature, low-pressure gas before returning to the compressor 31, thus completing the cycle. Therefore, when the thermal storage drying equipment starts working, the refrigerant cycle can be used to carry away heat from the heat storage medium and transfer it to the condenser 32 for heating the air, reducing the energy consumption of the heat pump system 3 during initial operation.

[0059] Preferably, such as Figure 1 As shown, a fan 21 is also installed in the air duct 2, which is located between the condenser 32 and the air inlet 11. This can accelerate the flow rate of hot air entering the drying drum 1 and the air flow rate in the air duct 2, which not only improves the drying efficiency of clothes, but also accelerates the heat exchange between the air that has undergone heat exchange and the evaporator 33, thereby improving the heat recovery efficiency.

[0060] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A heat storage drying device, characterized in that, include: A drying cylinder (1) having an air inlet (11) and an air outlet (12); Air duct (2), the air outlet of the air duct (2) is connected to the air inlet (11), and the air inlet of the air duct (2) is connected to the air outlet (12); A heat pump system (3) is installed in the air duct (2), which is capable of drying and heating the air from the air inlet of the air duct (2) and delivering hot air into the drying cylinder (1); as well as An energy storage device (4) is heat-exchangeably connected to the heat pump system (3) to store the heat generated by the heat pump system (3) and / or release the heat to the heat pump system (3).

2. The heat storage drying equipment according to claim 1, characterized in that, The energy storage device (4) includes a housing (41), a heat storage mechanism (42), and a heat exchanger (43). The heat storage mechanism (42) is disposed in the housing (41). The heat exchanger (43) is heat-exchangeably connected to the heat storage mechanism (42). A first solenoid valve (44) and a second solenoid valve (45) are respectively provided at both ends of the heat exchanger (43). The two ends of the heat exchanger (43) are connected to the heat pump system (3) through the first solenoid valve (44) and the second solenoid valve (45) respectively.

3. The heat storage drying equipment according to claim 2, characterized in that, The heat storage mechanism (42) includes a heat storage tank and a heat storage body filled in the heat storage tank, the heat storage body covering the heat exchanger (43).

4. The heat storage drying equipment according to claim 3, characterized in that, The heat storage body is a spatiotemporal phase-change material.

5. The heat storage drying equipment according to claim 3, characterized in that, The heat exchanger (43) is a heat exchange tube, which is installed in the heat storage tank.

6. The heat storage drying equipment according to claim 5, characterized in that, The heat exchange tube is a serpentine copper tube.

7. The heat storage drying equipment according to claim 5, characterized in that, The heat exchange tube is provided with multiple fins at intervals, one end of which is fixedly connected to the heat exchange tube and the other end extends into the heat storage body.

8. The heat storage drying equipment according to claim 2, characterized in that, The inner and / or outer surfaces of the enclosure (41) are provided with thermal insulation material.

9. The heat storage drying equipment according to any one of claims 2 to 7, characterized in that, The heat pump system (3) includes a compressor (31), a condenser (32), and an evaporator (33). The heat exchanger (43) is connected in series between the condenser (32) and the evaporator (33). The inlet of the condenser (32) is connected to the outlet of the compressor (31). The outlet of the condenser (32) is connected to the inlet of the heat exchanger (43) through the first solenoid valve (44). The outlet of the heat exchanger (43) is connected to the inlet of the evaporator (33) through the second solenoid valve (45). The outlet of the evaporator (33) is connected to the inlet of the compressor (31).

10. The heat storage drying equipment according to claim 9, characterized in that, A fan (21) is also provided in the air duct (2), and the fan (21) is located between the condenser (32) and the air inlet (11).

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