A dehumidifying clothes dryer based on solar energy storage and clothes drying method thereof

Abstract

The present invention discloses a dehumidifying clothes dryer based on solar energy storage and a clothes drying method thereof. The dehumidifying clothes dryer includes a housing internally provided with a rotating drum mechanism, a temperature and humidity sensor, and a solar thermal collection chamber. The solar thermal collection chamber is filled with a composite heat storage material, and a coil connected to a solar thermal collector is embedded in the composite heat storage material. The solar thermal collection chamber is connected to a first circulation fan and a second circulation fan connected to the drum. The second circulation fan is connected to an exhaust pipe and the drum respectively via a three-way solenoid valve. The rotating drum mechanism, the first circulation fan, the second circulation fan, the three-way solenoid valve, the solar thermal collector, and the temperature and humidity sensor are all connected to a controller. In the present invention, only the rotating drum mechanism, the circulation fan, the circulation pump of the solar thermal collector, and the control system consume electrical energy. By releasing the energy stored in the composite heat storage material, clothes are dehumidified and dried at low temperature. The dual drying process of heating and dehumidification improves efficiency and significantly reduces damage to clothes.

Description

Technical Field

[0001] The present invention relates to the technical field of clothes drying, and in particular to a dehumidifying clothes dryer based on solar energy storage and a clothes drying method thereof. Background Art

[0002] Although the current usage rate of dryers in my country is still far behind that in developed countries, my country has a large population. With the improvement of people's consumption capacity, changes in consumption habits, further standardization of the dryer market and enhanced awareness of people's pursuit of life experience, the usage rate of dryers will increase and the market prospects are very broad.

[0003] Most of the existing dryer equipment uses electric heating to dry clothes. Other types of dryer equipment include heat pump dryers, exhaust dryers, condensing dryers, etc. The above dryer equipment has the following shortcomings:

[0004] Exhaust-type clothes dryers have high air temperatures, reaching around 80°C. Heat is dissipated directly, resulting in significant heat loss. Furthermore, temperature control is imprecise, causing significant damage to clothing. For example, a clothes dryer is disclosed in a Chinese utility model patent with a publication date of November 11, 2022, and publication number CN217781531U.

[0005] Condensing clothes dryers not only have large condenser spaces, low cooling efficiency, slow drying speeds, and long drying times, but also consume a lot of energy. For example, a condensing clothes dryer is disclosed in a Chinese invention patent with a grant announcement date of May 10, 2022, and grant announcement number CN110753767B.

[0006] Heat pump dryers use internal circulation, which consumes a significant amount of heat during the dehumidification process. This results in poor heating efficiency, slow temperature rise, and long drying times. Furthermore, they are relatively expensive and have a limited customer base. For example, a heat pump tumble dryer is disclosed in a Chinese invention patent application with a publication date of May 10, 2022, and application publication number CN114775239A.

[0007] In summary, existing clothes dryers have technical problems such as inaccurate temperature control, serious damage to clothes, large space occupation, high energy consumption and low efficiency. Summary of the Invention

[0008] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a dehumidifying clothes dryer based on solar energy storage and a clothes drying method thereof, which solves the technical problems of high energy consumption and low efficiency of clothes dryers in the prior art.

[0009] The technical solution of this application is:

[0010] A dehumidifying clothes dryer based on solar energy storage includes a housing with a rotating drum mechanism installed within it, a temperature and humidity sensor installed within the housing, and a solar thermal collection chamber in circulation with the drum. The solar thermal collection chamber is filled with a composite thermal storage material, and a coil embedded within the composite thermal storage material is in circulation with the solar thermal collector. The solar thermal collection chamber is connected to a first and second circulating fans in communication with the drum, and the second circulating fan is connected to an exhaust pipe and the drum, respectively, via a three-way solenoid valve. The rotating drum mechanism, the first and second circulating fans, the three-way solenoid valve, the solar thermal collector, and the temperature and humidity sensor are all connected to a controller. The core technology of this technical solution is that when the clothes drying function is activated, only the rotating drum mechanism, the circulating fan, the circulation pump of the solar thermal collector, and the control system consume electrical energy. By releasing the energy stored in the composite thermal storage material, clothes are dehumidified and dried at low temperature. This dual drying process of heating and dehumidification improves efficiency, greatly reduces damage to clothes, and improves supply and demand matching. When the composite heat storage material is dried and saturated with water multiple times, it can store heat again and regenerate and dehydrate the material through solar heat storage at a temperature below 100°C, achieving fast and efficient regeneration and heat storage, which is more economical.

[0011] Furthermore, the composite heat storage material (6) includes a mixed salt, a porous material and a high-concentration silica sol, the mass ratio of the mixed salt to the porous material is 9:1, and the addition amount of the high-concentration silica sol is 10% of the total mass of the mixed salt and the porous material based on the mass sum of the mixed salt and the porous material. The mixed salt is composed of MgSO4 and MgCl2 in a mass ratio of 9:1, the porous material is composed of 13X molecular sieve and modified expanded graphite, the mass ratio of 13X molecular sieve and modified expanded graphite is 8:2~2:8, and the density of the high-concentration silica sol is 1.28~1.30 g / cm 3 , with a viscosity of 30 mPa·s. This solar low-temperature dehumidification and drying equipment utilizes solar energy as a drying energy source and stores excess solar energy in a composite heat storage material. This energy is then released at night or when solar energy is insufficient to dry the product. This achieves energy-saving effects by using only a small amount of electrical energy, significantly reducing energy consumption.

[0012] Furthermore, a baffle is provided in the solar heat collecting chamber, the coil is a serpentine coil, and the baffle is vertically arranged relative to the serpentine coil.

[0013] Furthermore, the solar heat collection chamber is arranged below the drum, the first circulation fan is arranged near the front of the drum, and the second circulation fan is arranged near the back of the drum.

[0014] Furthermore, a heat-insulating layer is provided outside the solar heat-collecting chamber, and a heat-insulating shell is provided outside the heat-insulating layer.

[0015] Furthermore, the temperature and humidity sensor is arranged on the top plate of the box and above the drum. The temperature and humidity sensor is opposite to the first circulation fan in the upper and lower directions. The first circulation fan and the second circulation fan are both one-way ventilation fans.

[0016] Furthermore, the rotating drum mechanism includes a drive unit located above the second circulation fan, the drive unit includes a sealed shell isolated from the inner cavity of the box, a drive motor connected to the controller is provided in the sealed shell, and the drive motor is connected to the drum through a transmission component.

[0017] Furthermore, the drive motor is arranged vertically, and drives the horizontally arranged drum shaft through a bevel gear set, and the drum shaft is connected to the sealed shell and the box body through a sealed bearing.

[0018] Furthermore, a one-way air inlet pipe is provided on the dryer door of the drum, and the one-way air inlet pipe is connected to a one-way air inlet valve that conducts one-way toward the drying chamber.

[0019] A dehumidification and drying method, using the above-mentioned dehumidification and drying machine based on solar energy storage, comprises the following stages:

[0020] Heat storage stage: When heat storage is in progress, the oil pump connected to the serpentine coil starts working, causing the heat transfer oil in the circulation pipeline composed of the solar collector and the serpentine coil to circulate. The solar collector heats the heat transfer oil, which in turn heats the composite heat storage material through the serpentine coil, causing the moisture adsorbed by the composite heat storage material to evaporate. At this time, the second circulation fan is turned on, and the exhaust pipe connection of the three-way solenoid valve is opened, so that the water vapor in the solar collector chamber is discharged to the outside, allowing the composite heat storage material to store heat. In addition, the heat preservation effect of the insulation layer and the insulation shell can effectively reduce heat loss.

[0021] Standby stage: The first circulation fan and the second circulation fan are one-way ventilation fans. After the heat storage stage, the first circulation fan, the second circulation fan and the three-way solenoid valve are closed, and the solar collector is in a closed space. The external gas cannot contact the composite heat storage material to generate heat.

[0022] Drying stage: Open the dryer door and place the clothes to be dried into the drying chamber of the drum. After placing the clothes, close the dryer door. At this time, send a command to the controller through the control panel to start the drive motor, which drives the bevel gear set to drive the drum shaft to rotate, causing the drum to roll.

[0023] When the drive motor is working, air is replenished from the outside into the drying room through the one-way air inlet pipe and the one-way air inlet valve. The first circulation fan starts working, sucking the humid air in the drying room into the solar thermal collection chamber, causing the composite heat storage material to undergo an adsorption reaction and release heat. During the flow of air, the air is heated by the serpentine coil and the composite heat storage material. Then the second circulation fan starts working, and the three-way solenoid valve connected to the drying room is opened, discharging the dry hot air in the solar thermal collection chamber into the drying room, evaporating the moisture on the clothes inside the drum, thereby achieving drying of the clothes through the continuous circulation of hot air.

[0024] When the composite heat storage material is dried multiple times and becomes saturated with water, it enters the heat storage stage at a temperature below 100° C., and reheating of the composite heat storage material and regeneration and dehydration of the material are achieved through solar heat storage.

[0025] This invention designs a low-energy dehumidification clothes dryer based on solar energy storage. This device utilizes solar collector panels to absorb free solar energy to heat thermal oil, and utilizes thermochemical adsorption heat storage technology to achieve on-demand solar energy output, achieving ultra-low energy consumption. By releasing the energy stored in the composite heat storage material, clothes are dehumidified and dried at low temperatures. This simultaneous heating and dehumidification improves the drying rate and quality of clothes, addressing the issues of slow drying speeds, high energy consumption, high costs, and poor drying quality associated with traditional clothes dryers.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The present invention can effectively reduce the cost of the device by using heat transfer oil circulation. The heat transfer oil is heated by solar energy, and the composite heat storage material stores heat. The stored energy can be conveniently released at any time for drying when there is no solar energy, thereby reducing energy costs and avoiding the use of high-power consumption equipment such as electric heating, which can effectively save energy consumption.

[0028] (2) The present invention uses a composite heat storage material in the solar thermal collection chamber, so that during the use of the device, there is no need to add any auxiliary heating equipment or materials. Only the heat storage material is used to achieve dual drying of heating and dehumidification, thereby improving the drying rate and achieving rapid drying at a suitable drying temperature. It is a closed circulation system with no heat loss at all, reducing the heat loss of dehumidification in conventional equipment. When the material is dried and absorbed water multiple times and is saturated, it can achieve re-heat storage and regeneration dehydration of the material at a temperature below 100°C through solar heat storage, achieving rapid and efficient regeneration and heat storage.

[0029] (3) The present invention transmits the internal conditions of the drying room through the control system and the temperature and humidity sensor. The personnel can use the control panel to change the internal working state of the drying room and accurately adjust the temperature and humidity, drying rate and drying mode to improve the quality of clothing drying.

[0030] (4) The composite heat storage material in the present invention can not only solve the problem of waste heat utilization, reduce the consumption of electricity and fossil energy, but also reduce the thermal pollution of the environment. Thermochemical heat storage utilizes the mutual conversion of thermal energy and chemical energy in the process of reversible chemical reaction to store energy. When heated by renewable heat sources such as solar energy, a reaction occurs to convert thermal energy into chemical energy for storage. The heat storage temperature is as low as 85℃, which is suitable for medium and low temperature heat storage. When exposed to moist air under certain conditions, an adsorption reaction occurs to release chemical energy into usable heat energy. Thermochemical heat storage has a high heat storage density of 979.2kJ / kg; it has a high thermal conductivity of 1.8W / (m·K) and a high water absorption rate of 0.67g / g; the prepared material has the characteristics of uniform particles, high strength, and not easy to break up. It also has good cycle stability. After 40 cycles, it can still maintain a heat storage density of more than 80% and the morphology and structure have not changed. It can achieve sealed long-term heat storage without heat loss under environmental conditions, and can realize cross-seasonal heat storage and long-distance transmission of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1 Schematic diagram of the structure of the dehumidifying clothes dryer based on solar energy storage in the present invention;

[0033] Figure 2 Schematic diagram of the serpentine coil described in the present invention;

[0034] Figure 1 Among them, 1. Box body; 2. Dryer door; 3. Solar collector chamber; 4. Drive chamber; 5. Drying chamber; 6. Solar collector; 7. Serpentine coil; 8. Composite heat storage material; 9. Baffle; 10. Insulation layer; 11. Insulation shell; 12. Second circulation fan; 13. First circulation fan; 14. Drive motor; 15. Bevel gear set; 16. Exhaust pipe; 17. Sealed shell; 18. Drum bearing; 19. Drum shaft; 20. Drum; 21. Oil pump; 22. Control panel; 23. Controller; 24. One-way air inlet pipe; 25. One-way air inlet valve; 26. Temperature and humidity sensor; 27. Three-way solenoid valve. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0036] The present invention provides a dehumidifying clothes dryer based on solar energy storage, such as Figure 1 As shown, the device comprises a housing 1 with a rotating drum mechanism installed within. The housing 1 houses a temperature and humidity sensor 26 and a solar heat collection chamber 3 in circular communication with a drum 20. The rotational mechanism of the drum 20 is identical to that of the prior art and will not be further described here. A dryer door 2 is located at the front end of the drum 20, and opening and closing the dryer chamber 5 allows for the closing and opening of the dryer chamber. The rear sidewall and outer peripheral wall of the drum 20 within the housing 1 are both hollow structures, similar to that of the prior art and will not be further described here.

[0037] The temperature and humidity sensor 26 can monitor the temperature and humidity within the housing 1 in real time and feed the detection signals back to other electrical units, such as the drive mechanism for the rotating drum and the heat collection control of the solar thermal collection chamber 3. The solar thermal collection chamber 3 is filled with a composite thermal storage material 8, embedded within which is a coil circulatedly connected to the solar thermal collector 6. This allows the composite thermal storage material 8 to be heated, dried, and dehydrated by the solar thermal collector 6. Preferably, the thermal oil within the coil is circulated by an oil pump 21, which is connected to a controller 22.

[0038] The solar thermal collection chamber 3 is connected to a first circulation fan 13 and a second circulation fan 12 which are connected to the drum 20. The second circulation fan 12 is connected to the exhaust pipe 16 and the drum 20 respectively through a three-way solenoid valve 27. The rotating drum mechanism, the first circulation fan 13, the second circulation fan 12, the three-way solenoid valve 27, the solar thermal collector 6, and the temperature and humidity sensor 26 are all connected to the controller 23.

[0039] The composite heat storage material 8 within the solar thermal collection chamber 3 simultaneously heats and dehumidifies the low-temperature, moist air drawn in by the first circulating fan 13. The low-humidity, high-temperature air then flows through the second circulating fan 12 and the three-way solenoid valve 27 to re-enter the drying chamber 5 for drying, thus completing the cycle. Once the composite heat storage material 8 has been dried multiple times and is saturated with water, the water vapor generated during the regeneration of the composite heat storage material 8 can be discharged through the second circulating fan 12, the three-way solenoid valve 27, and the exhaust pipe 16.

[0040] The core technology of this solution lies in the fact that when the drying function is activated, only the rotating drum mechanism, the circulating fan, the circulation pump of the solar collector 6, and the control system consume electricity. By releasing the energy stored in the composite thermal storage material 8, clothes are dehumidified and dried at low temperatures. This dual drying process of heating and dehumidification improves efficiency, significantly reduces damage to clothing, and improves supply and demand matching. When the composite thermal storage material 8 reaches saturation after repeated drying, it re-stores heat and regenerates the material through solar thermal storage at temperatures below 100°C, achieving rapid and efficient regeneration and heat storage, resulting in greater economic benefits.

[0041] Based on the above embodiment, as a preferred embodiment, based on the above embodiment, as a preferred embodiment, the composite heat storage material 6 includes 10% by mass of a porous material (wherein the ratios of 13X molecular sieve and modified expanded graphite are 8:2, 6:4, 4:6, and 2:8), 90% of a mixed salt (wherein the ratio of MgSO4 and MgCl2 is 9:1 by mass), and a high-concentration silica sol (density of 1.28-1.30 g / cm3 and viscosity of 30 mPa·s). The amount of the high-concentration silica sol added is 10% of the total mass of the mixed salt and the porous material.

[0042] The preparation of the composite heat storage material 6 includes the following steps: modified expanded graphite, ground 13X molecular sieve, mixed with inorganic salts, prepared composite heat storage material suspension, dried composite heat storage material, and formed composite heat storage material. The specific steps are as follows:

[0043] Step 1: Modification of expanded graphite: Weigh two samples in a mass fraction ratio of 1:10 (polyethylene glycol octylphenyl ether: expanded graphite), dissolve them in excess anhydrous ethanol, and ultrasonicate for 5 minutes to obtain a uniform solution. The solution is dried at 80°C for 10 hours to obtain dry hydrophilic modified expanded graphite (MEG);

[0044] Step 2: Grinding 13X molecular sieve: Grind 13X molecular sieve in a grinder for 5 minutes to obtain a surface powder;

[0045] Step 3: Mixing inorganic salts: Add MgSO4 and MgCl2 into deionized water according to the ratio and stir to obtain a solution;

[0046] Step 4: Prepare a composite heat storage material suspension: Mix the ground 13X molecular sieve and modified expanded graphite (EG) with the solution prepared in step 3, and then add high-concentration silica sol to prepare a composite suspension;

[0047] Step 5: Drying the composite heat storage material: placing the composite suspension prepared in step 4 into a constant temperature drying oven to obtain a semi-dry powder composite material;

[0048] Step 6: Forming the composite heat storage material: Grind the semi-dry powder composite material obtained in step 5 and put it into a mold, press it into shape using a tablet press, and then put the sample into a constant temperature drying oven for drying to obtain a finished product.

[0049] Furthermore, in the steps 5 and 6, the drying temperature of the constant temperature drying oven is 150° C., and the drying time is 3 hours.

[0050] Furthermore, the size of the mold in step six is 64×64×20 mm, the pressure range of the press is 0.5~1 MPa, the diameter of the finished product is 8 mm, the height is 6 mm, and the density is 0.73~0.96 g / cm3.

[0051] As an improvement to the above technical solution, a constant temperature and humidity chamber is used to test the adsorption performance of the composite heat storage material.

[0052] As an improvement to the above technical solution, a differential scanning calorimeter (DSC) is used to test the heat storage performance of the composite heat storage material.

[0053] As an improvement to the above technical solution, an X-ray diffractometer (XRD) is used to perform phase analysis on the composite heat storage material.

[0054] As an improvement to the above technical solution, a constant temperature and humidity chamber and a differential scanning calorimeter (DSC) were used to test the cyclic stability of the composite heat storage material, with the test number of 40 times.

[0055] Preferably, the composite heat storage material comprises 81% by mass of MgSO4, 9% by mass of MgCl2, 10% by mass of porous material, high concentration silica sol (density of 1.28-1.30 g / cm 3 , viscosity is 30mPa·s), wherein the porous material is composed of 13X molecular sieve and modified expanded graphite in a mass ratio of 6:4.

[0056] Preferably, the composite heat storage material 6 comprises 81% by mass of MgSO4, 9% by mass of MgCl2, 10% by mass of porous material, high concentration silica sol (density of 1.28-1.30 g / cm 3 , viscosity is 30mPa·s), wherein the porous material is composed of 13X molecular sieve and modified expanded graphite in a mass ratio of 8:2.

[0057] Preferably, the composite heat storage material comprises 81% by mass of MgSO4, 9% by mass of MgCl2, 10% by mass of porous material, high concentration silica sol (density of 1.28-1.30 g / cm 3 , viscosity of 30mPa·s), wherein the porous material is composed of 13X molecular sieve and modified expanded graphite in a mass ratio of 4:6.

[0058] Preferably, the composite heat storage material includes 81% by mass of MgSO4, 9% by mass of MgCl2, 10% by mass of porous material, high concentration silica sol (density of 1.28-1.30 g / cm 3 , viscosity of 30mPa·s), wherein the porous material is composed of 13X molecular sieve and modified expanded graphite in a mass ratio of 2:8.

[0059] On the basis of the above embodiment, as a preferred embodiment of a dehumidifying clothes dryer based on solar energy storage, Figure 1 and Figure 2 As shown, a baffle 9 is provided in the solar heat collecting chamber 3 , the coil is a serpentine coil 7 , and the baffle 9 is vertically arranged relative to the serpentine coil 7 .

[0060] Based on the above embodiment, as a preferred embodiment of the dehumidification dryer based on solar energy storage, the solar thermal collection chamber 3 is arranged below the drum 20, the first circulation fan 13 is arranged near the front of the drum 20, and the second circulation fan 12 is arranged near the back of the drum 20.

[0061] On the basis of the above embodiment, as a preferred embodiment of the dehumidification dryer based on solar energy storage, a heat preservation layer 10 is provided outside the solar heat collection chamber 3 , and a heat preservation shell 11 is provided outside the heat preservation layer 10 .

[0062] On the basis of the above embodiment, as a preferred embodiment of the dehumidification dryer based on solar energy storage, the temperature and humidity sensor 26 is arranged on the top plate of the box body 1 and above the drum 20, and the temperature and humidity sensor 26 is opposite to the first circulation fan 13 in the upper and lower directions, and the first circulation fan 13 and the second circulation fan 12 are both one-way ventilation fans.

[0063] On the basis of the above embodiment, as a preferred embodiment of the dehumidification dryer based on solar energy storage, the rotating drum mechanism includes a drive unit located above the second circulation fan 12, and the drive unit includes a sealed shell 17 isolated from the inner cavity of the box body 1, and a drive motor 14 connected to the controller 23 is arranged in the sealed shell 17, and the drive motor 14 is connected to the drum 20 through a transmission component.

[0064] On the basis of the above embodiment, as a preferred embodiment of the dehumidification dryer based on solar energy storage, the drive motor 14 is arranged vertically, and the drive motor 14 drives the horizontally arranged drum shaft 19 through the bevel gear set 15. The drum shaft 19 is connected to the sealed shell 17 and the box body 1 through the sealed bearing 18.

[0065] On the basis of the above embodiment, as a preferred embodiment of the dehumidification dryer based on solar energy storage, a one-way air inlet pipe 24 is provided on the dryer door 2 of the drum 20, and the one-way air inlet pipe 24 is connected to a one-way air inlet valve 25 that conducts one-way toward the drying chamber 5.

[0066] As a preferred embodiment of a dehumidifying dryer based on solar energy storage, the solar thermal collection chamber 3 is located at the bottom of the box body 1, the driving chamber 4 is located at the rear side of the box body 1, the drying chamber 5 is located at the front side of the box body 1, the dryer door 2 is located at the center of one side of the drying chamber 5, and the solar thermal collector 6 is installed outside the wall, which can be referred to the indoor unit and outdoor unit of the air-conditioning system.

[0067] The solar collector 6 is located outdoors, the several serpentine coils 7 are evenly distributed inside the solar thermal collection chamber 3, the connecting pipe composed of the serpentine coils 7 is fixedly connected to the two pipe ends of the solar thermal collector 6, the composite heat storage material 8 is evenly distributed in the solar thermal collection chamber 3, and the baffles 9 are installed on the side surfaces on both sides inside the solar thermal collection chamber 3.

[0068] The solar thermal collection chamber 3 is externally mounted with an insulation shell 11 and insulation layer 10. The first and second circulation fans 13, 12 are mounted between the solar thermal collection chamber 3 and the drying chamber 5. The drive motor 14 is mounted within the drive chamber 4. The bevel gear set 15 is mounted on the rotating end of the drive motor 14. One end of the three-way solenoid valve 27 is connected to the circulation fan 12, one end is connected to the exhaust pipe 16, and the other end is aligned with the drying chamber 5. The drum bearing 18 is mounted in the center of the sealed housing 17 and connected to the drum shaft 19.

[0069] The center of the opening of the drum 20 is connected to a one-way air inlet pipe 24 and a one-way air inlet valve 25. The control system includes a control panel 22, a controller 23, and a temperature and humidity sensor 26. The control panel 22 is mounted on the upper portion of the dryer door 2 and is connected to the temperature and humidity sensor 26 and the controller 22 via wiring. The temperature and humidity sensor 26 is mounted on the top of the drying chamber. The oil pump 21 is installed in the connecting pipe formed by the serpentine coil 7 and the solar collector 6, adjacent to the outer shell of the cabinet 1.

[0070] A clothes drying method employs the aforementioned dehumidifying clothes drying machine based on solar energy storage. The solar heat collecting plate of the solar heat collector 6 is installed outdoors in a sunny location. The cabinet 1 is placed indoors. The two are connected by a copper pipe, and an exhaust pipe 16 is connected from the cabinet 1 to the outdoors. The specific method includes the following stages:

[0071] Heat storage stage: When heat storage is performed, the oil pump 21 connected to the serpentine coil 7 starts working, so that the heat transfer oil in the circulation pipeline composed of the solar collector 6 and the serpentine coil 7 starts to circulate. The solar collector 6 heats the heat transfer oil, and heats the composite heat storage material 8 through the serpentine coil 7, so that the water adsorbed by the composite heat storage material 8 evaporates; at this time, the second circulation fan 12 is turned on, and the connection between the three-way solenoid valve 27 and the exhaust pipe 16 is opened, so that the water vapor in the solar heat collection chamber 3 is discharged to the outside, so that the composite heat storage material 8 can store heat, and the heat preservation effect of the thermal insulation layer 10 and the thermal insulation shell 11 can effectively reduce heat loss.

[0072] Standby stage: the first circulation fan 13 and the second circulation fan 12 are one-way ventilation fans. After the heat storage stage, the first circulation fan 13, the second circulation fan 12 and the three-way solenoid valve 27 are closed, and the solar thermal collection chamber 3 is in a closed space. The external gas cannot contact the composite heat storage material 8 to generate heat release.

[0073] Drying stage: The dryer door 2 is opened, and the clothes to be dried are placed in the drying chamber 5 of the drum 20. After the clothes are placed, the dryer door 2 is closed. At this time, a command is sent to the controller 23 through the control panel 22 to start the drive motor 14. The drive motor 14 drives the bevel gear set 15 to drive the drum shaft 19 to rotate, causing the drum 20 to roll.

[0074] When the drive motor 14 is working, air is replenished from the outside into the drying chamber 5 through the one-way air inlet pipe 24 and the one-way air inlet valve 25, and the first circulation fan 13 starts working to suck the humid air in the drying chamber into the solar thermal collection chamber 3, causing the composite heat storage material 8 to undergo an adsorption reaction and release heat. During the flow of air, the air is heated by the serpentine coil 7 and the composite heat storage material 8, and then the second circulation fan 12 starts working, and the three-way solenoid valve 27 is opened at the connection with the drying chamber 5, and the dry hot air in the solar thermal collection chamber is discharged to the drying chamber 5, and the moisture on the clothes inside the drum 20 is evaporated, thereby achieving the drying of clothes through the continuous circulation of hot air.

[0075] When the composite heat storage material 8 is dried multiple times and becomes saturated with water, it enters the heat storage stage at a temperature below 100° C., and reheating of the composite heat storage material 8 and regeneration and dehydration of the material are achieved through solar heat storage.

[0076] Any details not provided in the present invention are conventional technical means known to those skilled in the art.

[0077] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A clothes drying method, using a dehumidifying clothes dryer based on solar energy storage, the dehumidifying clothes dryer comprising a box (1) with a rotating drum mechanism disposed therein, characterized in that: The box (1) is provided with a temperature and humidity sensor (26), a solar heat collecting chamber (3) in circulation communication with the drum (20), the solar heat collecting chamber (3) is filled with a composite heat storage material (8), a coil in circulation communication with the solar heat collector (6) is embedded in the composite heat storage material (8), the solar heat collecting chamber (3) is connected to a first circulation fan (13) and a second circulation fan (12) in communication with the drum (20), the second circulation fan (12) is in communication with the exhaust pipe (16) and the drum (20) respectively through a three-way solenoid valve (27), the rotating drum mechanism, the first circulation fan (13), the second circulation fan (12), the three-way solenoid valve (27), the solar heat collector (6), and the temperature and humidity sensor (26) are all connected to the controller (23); A baffle (9) is provided in the solar heat collection chamber (3), the coil is a serpentine coil (7), and the baffle (9) is vertically arranged relative to the serpentine coil (7); The drying method comprises the following stages: Heat storage stage: When heat storage is performed, the oil pump (21) connected to the serpentine coil (7) starts to work, so that the heat transfer oil in the circulation pipeline composed of the solar collector (6) and the serpentine coil (7) starts to circulate, and the solar collector (6) heats the heat transfer oil, which heats the composite heat storage material (8) through the serpentine coil (7), so that the water adsorbed by the composite heat storage material (8) evaporates; at this time, the second circulation fan (12) is turned on, and the connection between the three-way solenoid valve (27) and the exhaust pipe (16) is opened, so that the water vapor in the solar heat collection chamber (3) is discharged to the outside, so that the composite heat storage material (8) can store heat, and the heat loss can be effectively reduced through the heat insulation effect of the heat insulation layer (10) and the heat insulation shell (11); Standby stage: the first circulation fan (13) and the second circulation fan (12) are one-way ventilation fans. After the heat storage stage, the first circulation fan (13), the second circulation fan (12) and the three-way solenoid valve (27) are closed, and the solar heat collection chamber (3) is in a closed space. The external gas cannot contact the composite heat storage material (8) to generate heat release; Drying stage: the door (2) of the dryer is opened, and the clothes to be dried are placed in the drying chamber (5) of the drum (20). After the clothes are placed, the door (2) of the dryer is closed. At this time, a command is sent to the controller (23) through the control panel (22), so that the drive motor (14) starts to work, and the drive motor (14) drives the bevel gear set (15) to drive the drum shaft (19) to rotate, so that the drum (20) rolls. When the driving motor (14) is working, air is added from the outside to the drying chamber (5) through the one-way air inlet pipe (24) and the one-way air inlet valve (25), and the first circulation fan (13) starts working to draw the moist air in the drying chamber into the solar heat collecting chamber (3), causing the composite heat storage material (8) to undergo an adsorption reaction and release heat. During the air flow, the air is heated by the serpentine coil (7) and the composite heat storage material (8). Then, the second circulation fan (12) starts working, and the connection between the three-way solenoid valve (27) and the drying chamber (5) is opened, and the dry hot air in the solar heat collecting chamber is discharged to the drying chamber (5), evaporating the moisture on the clothes inside the drum (20), thereby achieving drying of the clothes through the continuous circulation of the hot air. When the composite heat storage material (8) is dried multiple times and becomes saturated with water, it enters the heat storage stage at a temperature below 100° C., and reheat storage of the composite heat storage material (8) and regeneration and dehydration of the material are achieved through solar heat storage.

2. The clothes drying method according to claim 1, characterized in that: The composite heat storage material (8) comprises mixed salt, porous material and high-concentration silica sol, the mass ratio of the mixed salt to the porous material is 9:1, and the addition amount of the high-concentration silica sol is 10% of the total mass of the mixed salt and the porous material based on the total mass of the mixed salt and the porous material. The mixed salt is composed of and The porous material is composed of 13X molecular sieve and modified expanded graphite in a mass ratio of 9:1, the mass ratio of 13X molecular sieve and modified expanded graphite is 8:2~2:8, and the density of the high concentration silica sol is 1.28~1.30 , viscosity is 30mPa·s.

3. The clothes drying method according to claim 2, characterized in that: The solar heat collection chamber (3) is arranged below the drum (20), the first circulation fan (13) is arranged near the front of the drum (20), and the second circulation fan (12) is arranged near the back of the drum (20).

4. The clothes drying method according to any one of claims 1 to 3, characterized in that: A heat-insulating layer (10) is provided outside the solar heat-collecting chamber (3), and a heat-insulating shell (11) is provided outside the heat-insulating layer (10).

5. The clothes drying method according to claim 4, characterized in that: The temperature and humidity sensor (26) is arranged on the top plate of the box (1) and above the drum (20). The temperature and humidity sensor (26) is opposite to the first circulation fan (13) in the vertical direction. The first circulation fan (13) and the second circulation fan (12) are both one-way ventilation fans.

6. The clothes drying method according to any one of claims 1 to 3 and 5, characterized in that: The rotating drum mechanism includes a drive unit located above the second circulating fan (12), the drive unit including a sealed housing (17) isolated from the inner cavity of the box (1), a drive motor (14) connected to a controller (23) is provided in the sealed housing (17), and the drive motor (14) is connected to the drum (20) via a transmission component.

7. The clothes drying method according to claim 6, characterized in that: The drive motor (14) is arranged vertically, and drives a horizontally arranged roller shaft (19) through a bevel gear set (15). The roller shaft (19) is connected to the sealed housing (17) and the box (1) through a sealed bearing (18).

8. The clothes drying method according to any one of claims 1 to 3, 5 and 7, characterized in that: A one-way air inlet pipe (24) is provided on the clothes drying machine door (2) of the drum (20), and the one-way air inlet pipe (24) is connected to a one-way air inlet valve (25) that is unidirectionally conducted toward the clothes drying chamber (5).

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