Control method of heat pump drying equipment and heat pump drying equipment

Abstract

The invention discloses a control method of heat pump drying equipment and the heat pump drying equipment, the heat pump drying equipment comprises a refrigerant circulation loop, and the control method comprises the following steps that the load capacity in the heat pump drying equipment is obtained; and the circulation amount of a refrigerant in the refrigerant circulation loop is controlled to correspond to the obtained load amount. According to the heat pump drying equipment, the circulation amount of the refrigerant in the circulation loop is adjusted, so that the balance between the working load of the circulation loop and the load amount in the heat pump drying equipment can be kept in the process that the heat pump drying equipment executes the drying instruction; the heat pump drying equipment reduces loss caused by overhigh heat productivity of a circulation loop due to mismatching of the load capacity and the refrigerant circulation volume, thereby solving the problem of overhigh temperature of parts in the heat pump drying equipment, preventing the parts from being quickly aged and damaged due to high temperature, and prolonging the service life of the heat pump drying equipment. And meanwhile, the drying efficiency and the service life of the heat pump drying equipment are improved.

Description

Technical Field

[0001] The present invention belongs to the field of household appliances, and more specifically, relates to a control method for a heat pump drying device and a heat pump drying device. Background Art

[0002] With the improvement of people's living standards, clothing treatment devices that can quickly dry clothes are increasingly favored by consumers. Among them, compared with traditional condensing drying devices, heat pump drying devices are increasingly favored by consumers because their heat only circulates inside the machine and will not dissipate outward, having the advantages of energy conservation and short drying time.

[0003] Chinese Patent Application No. 202210082663.7 discloses a refrigerant flow control method, device and equipment for a clothing drying device. The method includes: obtaining the humidity in the drum and the first temperature at the outlet of the compressor; determining the current drying stage of the clothing drying device according to the humidity and the first temperature; determining the target temperature difference between the temperature at the outlet of the condenser or the inlet of the drum and the temperature at the inlet of the evaporator according to the drying stage; obtaining the second temperature at the outlet of the condenser or the inlet of the drum and the third temperature at the inlet of the evaporator, and obtaining the actual temperature difference according to the difference between the second temperature and the third temperature; controlling the opening of the electronic expansion valve according to the target temperature difference and the actual temperature difference to adjust the refrigerant flow through the electronic expansion valve. This invention solves the problem of the too high cost of controlling the refrigerant flow in existing drying devices.

[0004] However, the refrigerant circulation circuit of existing heat pump drying devices mainly includes a compressor, a condenser, a throttler and an evaporator connected in series through pipelines, and the refrigerant circulation circuit is closed. Moreover, the circulation amount of the refrigerant in the circulation circuit is fixed and cannot be increased or decreased according to the actual weight of the clothes to be dried, resulting in the working load of the compressor exceeding the actual needs of drying the clothes, and then causing the internal temperature of the drying device to be too high, which will not only reduce the drying efficiency but also shorten the service life of the drying device.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a control method for a heat pump drying device to achieve the purpose of controlling the injection or extraction of refrigerant into or from the circulation circuit during the operation of the drying device, improving the drying efficiency and reducing losses.

[0007] Another purpose of the present invention is to provide a heat pump drying device using the above control method to achieve the purpose of ensuring that the circulation amount of the refrigerant in the circulation circuit matches the load amount, improving the drying efficiency and increasing the service life of the heat pump drying device.

[0008] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A control method for a heat pump drying device, the heat pump drying device including a refrigerant circulation circuit, the control method comprising the following steps: obtaining the load amount in the heat pump drying device; controlling the circulation amount of the refrigerant in the refrigerant circulation circuit to correspond to the obtained load amount.

[0010] Further, it is preset that the processing module of the heat pump drying device has a refrigerant circulation amount corresponding to the load amount. After obtaining the load amount in the heat pump drying device, the refrigerant circulation amount in the refrigerant circulation circuit is obtained, and it is judged whether the obtained refrigerant circulation amount is the same as the refrigerant circulation amount in the processing module. If not, control is carried out to adjust the refrigerant circulation amount in the refrigerant circulation circuit to be the same as the refrigerant circulation amount in the processing module.

[0011] Further, before starting drying, the initial load amount in the heat pump drying device is obtained. After controlling the refrigerant circulation amount in the refrigerant circulation circuit to correspond to the initial load amount, drying is started.

[0012] Further, during the drying process, as the drying process progresses, the refrigerant circulation amount in the refrigerant circulation circuit is controlled to gradually decrease.

[0013] Further, the load amount in the heat pump drying device is detected in real time, the change rate of the load amount is calculated, and the change rate of the refrigerant circulation amount in the refrigerant circulation circuit is controlled to be equal to the change rate of the load amount.

[0014] Further, the heat pump drying device includes a refrigerant filling device communicated with the refrigerant circulation circuit,

[0015] Controlling the refrigerant circulation amount in the refrigerant circulation circuit includes: controlling the refrigerant filling device to inject refrigerant into the refrigerant circulation circuit to increase the refrigerant circulation amount, or controlling the refrigerant filling device to extract refrigerant from the refrigerant circulation circuit to reduce the refrigerant circulation amount.

[0016] Further, the heat pump drying device includes a first valve body provided at the inlet of the refrigerant filling device and a second valve body provided in the refrigerant circulation circuit;

[0017] When injecting refrigerant into the refrigerant circulation circuit, control is carried out to open the first valve body and the first valve body simultaneously; when extracting refrigerant from the refrigerant circulation circuit, control is carried out to open the first valve body and close the second valve body.

[0018] The present invention also provides a heat pump drying device adopting the above control method, including a refrigerant circulation circuit, a refrigerant filling device is provided in the circulation circuit, the refrigerant filling device includes a tank body having a cavity and a pusher embedded in the cavity, and the pusher can slide in the tank body to change the volume of the cavity communicated with the circulation circuit.

[0019] Further, a condenser and an evaporator are provided in the circulation loop, and the refrigerant filling device is arranged on the conduit connecting the condenser and the evaporator.

[0020] Further, a branch pipe is provided between the refrigerant filling device and the conduit, and a first valve body is connected in series on the branch pipe. A second valve body is connected in series between the interface of the conduit connecting the branch pipe and the evaporator.

[0021] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0022] 1. By adjusting the circulation amount of the refrigerant in the circulation loop, the heat pump drying device can maintain the balance between the working load of the circulation loop and the load in the heat pump drying device during the execution of the drying instruction, reducing the situation that the heat generation of the circulation loop is too high due to the mismatch between the load and the refrigerant circulation amount, thus solving the problem of overheating of the components in the heat pump drying device, avoiding the rapid aging and damage of the components due to high temperature, and improving the drying efficiency and service life of the heat pump drying device at the same time.

[0023] 2. By controlling the driving refrigerant filling device, the stored refrigerant can be injected into the circulation loop, improving the heat transfer amount per unit time between the circulation loop and the clothes to be dried, and further increasing the speed of stripping water vapor from the clothes and transferring it to the outside, greatly improving the drying efficiency of the heat pump drying device.

[0024] 3. By setting the target ratio between the refrigerant and the load, a reference is provided for adjusting the refrigerant in the circulation loop, ensuring that the circulation amount of the refrigerant in the circulation loop can always balance the drying energy consumption and drying efficiency when the drying instruction is executed, increasing the service life of the heat pump drying device and improving the user experience at the same time.

[0025] The following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings. Description of the Drawings

[0026] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts. In the drawings:

[0027] Figure 1 is a flowchart of a control method for a heat pump drying device of the present invention;

[0028] Figure 2It is a flowchart of the control method for another heat pump drying device of the present invention;

[0029] Figure 3 It is a flowchart of the control method for another heat pump drying device of the present invention;

[0030] Figure 4 It is a flowchart of the control method for another heat pump drying device of the present invention;

[0031] Figure 5 It is a flowchart of the control method for another heat pump drying device of the present invention;

[0032] Figure 6 It is a schematic structural diagram of the refrigerant circulation circuit of a heat pump drying device in the present invention.

[0033] Wherein: 1. Condenser; 2. Evaporator; 3. Duct; 4. Branch pipe; 5. Tank body; 6. Propeller; 7. First valve body; 8. Second valve body; 9. Compressor; 10. Refrigerant filling device.

[0034] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "left", "right", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, the "heat pump drying device" refers to the general term for a class of household appliances that can execute programs such as washing, dewatering, and drying, such as washing machines, washer-dryers, etc.

[0039] Such as Figures 1 to 4 As shown, in the embodiment of the present invention, a control method for a heat pump drying device is introduced. Among them, the heat pump drying device includes a condenser 1, an evaporator 2, and a conduit 3 connecting the condenser 1 and the evaporator 2. In addition, the heat pump drying device further includes a refrigerant charging device 10 communicated with the conduit 3 for adjusting the circulation amount of the refrigerant in the refrigerant circulation loop.

[0040] Specifically, the compressor 9, the condenser 1, the evaporator 2, and the refrigerant charging device 10 are connected in series through pipelines to jointly form a refrigerant circulation loop. After injecting the refrigerant into the circulation loop, the compressor 9 pressurizes and heats up the refrigerant. The heated refrigerant flows into the condenser 1 and releases heat in the condenser 1. Then, the refrigerant flows into the evaporator 2 through the conduit 3. Before entering the evaporator 2, the refrigerant liquefies due to the rapid drop in heat and pressure.

[0041] The refrigerant charging device 10 is communicated with the conduit 3 through a branch pipe 4. The refrigerant charging device 10 includes a tank body 5 with a cavity and a pusher 6 embedded in the cavity. Driving the pusher 6 to slide in the tank body 5 can change the volume of the cavity communicated with the circulation loop, so as to achieve the effect of injecting refrigerant into the circulation loop or extracting the refrigerant from the circulation loop to change the circulation amount of the refrigerant in the circulation loop.

[0042] Particularly, in order to flexibly adjust the circulation amount of the refrigerant and improve the efficiency conversion rate of the heat pump drying device, the control method includes the following steps: obtaining the load amount in the heat pump drying device, and controlling the circulation amount of the refrigerant in the refrigerant circulation loop to correspond to the obtained load amount.

[0043] In addition, in the present invention, the load amount may include the net weight of the clothes to be dried, the real-time weight of the clothes to be dried during the drying process, the initial weight of the water contained in the clothes to be dried before the drying starts, and the change rate of the weight of the clothes to be dried, etc.

[0044] Moreover, adjusting the circulation amount of the refrigerant in the circulation loop can refer to any one of the net weight of the clothes to be dried, the initial weight of the clothes to be dried, and the real-time weight of the clothes to be dried.

[0045] Such as Figure 1 As shown, the control method of the heat pump drying device in this embodiment includes the following specific steps:

[0046] S1 Turn on the heat pump drying device;

[0047] S2 Obtain the load amount in the heat pump drying device;

[0048] S3 controls the refrigerant circulation amount in the refrigerant circulation loop to correspond to the obtained load amount;

[0049] S4 executes the drying instruction;

[0050] S5 shuts down the heat pump drying device.

[0051] In this embodiment, the heat pump drying device adjusts the refrigerant circulation amount in the circulation loop, so that during the execution of the drying instruction, the heat pump drying device can maintain the balance between the working load of the circulation loop and the load amount in the heat pump drying device, reducing the situation that the heat generation amount of the circulation loop is too high due to the mismatch between the load amount and the refrigerant circulation amount, thus solving the problem of too high temperature of components in the heat pump drying device, avoiding the rapid aging and damage of components due to high temperature, and at the same time improving the drying efficiency and service life of the heat pump drying device.

[0052] In another embodiment of the present invention, a control method for a heat pump drying device is introduced.

[0053] Controlling the refrigerant circulation amount in the refrigerant circulation loop to correspond to the obtained load amount includes: presetting that the processing module of the heat pump drying device has a refrigerant circulation amount corresponding to the load amount. After obtaining the load amount in the heat pump drying device, obtain the refrigerant circulation amount in the refrigerant circulation loop.

[0054] Judge whether the obtained refrigerant circulation amount is the same as the refrigerant circulation amount in the processing module. If not, control to adjust the refrigerant circulation amount in the refrigerant circulation loop to be the same as the refrigerant circulation amount in the processing module.

[0055] To adjust the refrigerant circulation amount in the circulation loop, a refrigerant filling device 10 is connected and arranged in the circulation loop. The refrigerant filling device 10 includes a tank body 5 with a cavity and a pusher 6 embedded in the cavity.

[0056] Driving the pusher 6 to slide in the tank body 5 can change the volume of the cavity communicating with the circulation loop, so as to achieve the effect of injecting refrigerant into the circulation loop or pumping the refrigerant out of the circulation loop to change the refrigerant circulation amount in the circulation loop.

[0057] Specifically, adjusting the refrigerant circulation amount in the circulation loop includes: controlling the refrigerant filling device 10 to inject refrigerant into the refrigerant circulation loop to increase the refrigerant circulation amount.

[0058] As Figure 2 shown, the specific steps of the control method of the heat pump drying device in this embodiment are as follows:

[0059] S01 turns on the heat pump drying device;

[0060] In the processing module of the preset heat pump drying device S02, there is a refrigerant circulation volume corresponding to the load volume.

[0061] S03 Obtain the load volume in the heat pump drying device.

[0062] S04 Obtain the refrigerant circulation volume in the refrigerant circulation loop.

[0063] S05 Determine whether the obtained refrigerant circulation volume is the same as the refrigerant circulation volume in the processing module.

[0064] S061 If so, control to enter step S07.

[0065] S062 If not, control to enter step S0611.

[0066] S0611 Control to adjust the refrigerant circulation volume in the refrigerant circulation loop to be the same as the refrigerant circulation volume in the processing module.

[0067] S07 Execute the drying instruction.

[0068] S08 Turn off the heat pump drying device.

[0069] In this embodiment, by controlling the driving refrigerant filling device 10, the refrigerant stored therein can be injected into the circulation loop, improving the heat transfer amount per unit time between the circulation loop and the clothes to be dried. Furthermore, the speed of stripping water vapor from the clothes and transferring it to the outside can be increased, greatly improving the drying efficiency of the heat pump drying device.

[0070] As Figure 3 shown, in another embodiment of the present invention, a control method for a heat pump drying device is introduced.

[0071] Specifically, before starting drying, obtain the initial load volume in the heat pump drying device. After controlling the refrigerant circulation volume in the refrigerant circulation loop to correspond to the initial load volume, then start drying.

[0072] As Figure 3 shown, the specific steps of the control method for the heat pump drying device in this embodiment are as follows:

[0073] S01 Turn on the heat pump drying device.

[0074] S02 Preset that in the processing module of the heat pump drying device, there is a refrigerant circulation volume corresponding to the load volume.

[0075] S03 Before starting drying, obtain the initial load volume in the heat pump drying device.

[0076] S04 Obtain the refrigerant circulation volume in the refrigerant circulation loop.

[0077] S05 Determine whether the obtained refrigerant circulation amount is the same as the refrigerant circulation amount in the processing module;

[0078] S061 If so, control to enter step S07;

[0079] S062 If not, control to enter step S0611;

[0080] S0611 Control to adjust the refrigerant circulation amount in the refrigerant circulation circuit to be the same as the refrigerant circulation amount in the processing module;

[0081] S07 Execute the drying instruction;

[0082] S08 Turn off the heat pump drying device.

[0083] In another embodiment, obtain the initial weight of the clothes to be dried. Preset the target ratio with the best drying efficiency between the circulation amount of the refrigerant in the circulation circuit and the initial weight of the clothes to be dried.

[0084] Before executing the drying instruction, first control to obtain the circulation amount of the refrigerant. Then, compare the ratio of this circulation amount to the initial weight of the clothes to be dried with the target ratio to determine whether it is less than the target ratio. If it is less than the target ratio, control the refrigerant filling device 10 to inject refrigerant into the refrigerant circulation circuit.

[0085] In this embodiment, by setting the target ratio of the refrigerant circulation amount to the initial weight of the clothes, a reference is provided for adjusting the refrigerant in the circulation circuit, ensuring that when the drying instruction is executed, the circulation amount of the refrigerant in the circulation circuit can always balance the drying energy consumption and drying efficiency, increasing both the service life of the heat pump drying device and the user experience.

[0086] In another embodiment of the present invention, a control method for a heat pump drying device is introduced. During the drying process, as the drying process progresses, control the refrigerant circulation amount in the refrigerant circulation circuit to gradually decrease.

[0087] As Figure 4 shown, the specific steps of the control method for the heat pump drying device in this embodiment are as follows:

[0088] S01 Turn on the heat pump drying device;

[0089] S02 Preset the refrigerant circulation amount corresponding to the load in the processing module of the heat pump drying device;

[0090] S03 Obtain the initial load in the heat pump drying device before starting drying;

[0091] S04 Obtain the refrigerant circulation amount in the refrigerant circulation circuit;

[0092] S05 Determine whether the obtained refrigerant circulation volume is the same as the refrigerant circulation volume in the processing module;

[0093] S061 If so, control to enter step S07;

[0094] S062 If not, control to enter step S0611;

[0095] S0611 Control to adjust the refrigerant circulation volume in the refrigerant circulation circuit to be the same as the refrigerant circulation volume in the processing module;

[0096] S07 Execute the drying instruction;

[0097] S08 Control the refrigerant circulation volume in the refrigerant circulation circuit to gradually decrease;

[0098] S09 Turn off the heat pump drying device.

[0099] In another embodiment, increasing the refrigerant circulation volume includes: after injecting refrigerant into the refrigerant circuit, controlling to repeat the judgment step, and starting to execute the drying instruction after reaching the target ratio.

[0100] In this embodiment, the control method ensures that the refrigerant circulation volume can be more accurate and better matches the weight of the clothes to be dried by adding repeated judgment steps, further improving the drying efficiency.

[0101] Such as Figure 5 As shown, in another embodiment of the present invention, a control method for a heat pump drying device is introduced. The load in the heat pump drying device is detected in real time, the change rate of the load is calculated, and the change rate of the refrigerant circulation volume in the refrigerant circulation circuit is controlled to be equal to the change rate of the load.

[0102] The specific steps of the control method for the heat pump drying device in this embodiment are as follows:

[0103] S01 Turn on the heat pump drying device;

[0104] S02 Preset that the processing module of the heat pump drying device has a refrigerant circulation volume corresponding to the load;

[0105] S03 Obtain the initial load in the heat pump drying device before starting to dry;

[0106] S04 Obtain the refrigerant circulation volume in the refrigerant circulation circuit;

[0107] S05 Determine whether the obtained refrigerant circulation volume is the same as the refrigerant circulation volume in the processing module;

[0108] S061 If so, control to enter step S07;

[0109] S062 If not, control to enter step S0611;

[0110] S0611 controls to adjust the refrigerant circulation amount in the refrigerant circulation loop to be the same as that in the processing module;

[0111] S07 executes the drying instruction;

[0112] S08 detects the load amount in the heat pump drying device in real time;

[0113] S09 calculates the change rate of the load amount;

[0114] S10 controls the change rate of the refrigerant circulation amount in the refrigerant circulation loop to be equal to the change rate of the load amount;

[0115] S11 shuts down the heat pump drying device.

[0116] In another embodiment of the present invention, a control method for a heat pump drying device is introduced. Specifically, the heat pump drying device includes a refrigerant filling device 10 communicated with the refrigerant circulation loop.

[0117] Among them, the refrigerant filling device 10 includes a tank body 5 with a cavity and a thruster 6 embedded in the cavity. Driving the thruster 6 to slide in the tank body 5 can change the volume of the cavity communicated with the circulation loop, so as to achieve the effect of injecting refrigerant into the circulation loop or withdrawing refrigerant from the circulation loop to change the refrigerant circulation amount in the circulation loop.

[0118] Specifically, adjusting the refrigerant circulation amount in the circulation loop includes: controlling the refrigerant filling device 10 to extract refrigerant from the refrigerant circulation loop to reduce the refrigerant circulation amount; or, controlling the refrigerant filling device to inject refrigerant into the refrigerant circulation loop to increase the refrigerant circulation amount.

[0119] In another embodiment, the heat pump drying device includes a first valve body arranged at the inlet of the refrigerant filling device and a second valve body arranged in the refrigerant circulation loop.

[0120] When injecting refrigerant into the refrigerant circulation loop, control the first valve body and the first valve body to open simultaneously; when extracting refrigerant from the refrigerant circulation loop, control the first valve body to open and the second valve body to close.

[0121] In this embodiment, by controlling the driving of the refrigerant filling device 10, the refrigerant flowing in the circulation loop can be withdrawn from the circulation loop into the tank body 5 of the refrigerant filling device 10, reducing the working load of the compressor 9 driving the refrigerant circulation, thereby avoiding excessive heating of the circulation loop and reducing the power consumption loss of the heat pump drying device.

[0122] As Figure 6 shown, in an embodiment of the present invention, a heat pump drying device operating with the above control method is introduced.

[0123] The heat pump drying equipment includes a refrigerant circulation circuit. A refrigerant filling device is provided in the circulation circuit. The refrigerant filling device includes a tank body with a cavity and a propeller embedded in the cavity. The propeller slides in the tank body to change the volume of the cavity communicating with the circulation circuit.

[0124] Specifically, the circulation circuit includes a condenser 1, an evaporator 2, and a refrigerant filling device 10 provided on a conduit 3 between the condenser 1 and the evaporator 2, for adjusting the circulation amount of the refrigerant in the refrigerant circulation circuit.

[0125] In addition, the heat pump drying equipment further includes a barrel body and a housing. The barrel body is disposed within the housing. Among them, the barrel body includes a bottom wall and a side wall, and the side wall surrounds the periphery of the bottom wall to form a receiving chamber. The receiving chamber can be used to receive the clothes to be processed.

[0126] The housing includes a base. The base is disposed below the barrel body along the direction of gravity, for supporting the overall structure of the barrel body.

[0127] In addition, the condenser 1 includes a manifold arranged in a bent and coiled manner and a plurality of heat exchange fins arranged at intervals along the extending direction of the manifold. The manifold is disposed on the side of the side wall away from the base. Each heat exchange fin is connected in series to the manifold.

[0128] Specifically, the refrigerant exchanges heat with the outside air through the heat exchange fins and the manifold. Since the contact area between the heat exchange fins and the side wall is relatively large, the heat exchange area of the condenser 1 can be effectively increased, accelerating the heat exchange between the condenser 1 and the wet clothes in the receiving chamber, and improving the drying efficiency. The material of the condenser 1 can be selected from materials with relatively high thermal conductivity such as aluminum alloy and brass.

[0129] It can be understood that in traditional heat pump drying equipment, both the condenser 1 and the evaporator 2 are placed at the lower part of the barrel body. In the same space, the condenser 1 heats up and the evaporator 2 cools down, which not only accelerates the energy loss but also affects the heat exchange efficiency of each other. In addition, due to the limited space at the lower part of the barrel body, the sizes of the condenser 1, the evaporator 2, and the compressor 9 are restricted and cannot be designed to be larger sizes, affecting the heat exchange efficiency of the circulation circuit.

[0130] In the heat pump drying equipment of the present invention, the condenser 1 and the evaporator 2 are arranged at a certain distance apart and are respectively located on both sides of the barrel body, which can enable the condenser 1 and the evaporator 2 to exchange heat independently without affecting each other, thereby ensuring the drying efficiency of the heat pump drying equipment.

[0131] In this embodiment, a temporary storage device capable of injecting refrigerant into or withdrawing refrigerant from the refrigerant circulation loop is added to the heat pump drying device. By adjusting the circulation volume of the refrigerant in the circulation loop to match the load of the clothes to be dried, the working load of the compressor 9 that maintains the refrigerant circulation is reduced. Furthermore, the heat loss of the compressor 9 is reduced, and the drying efficiency of the heat pump drying device is improved.

[0132] In another embodiment, the refrigerant filling device 10 includes a tank body 5 having a cavity and a pusher 6 embedded in the cavity. The pusher 6 slides within the tank body 5 to change the volume of the cavity communicating with the conduit 3.

[0133] Specifically, a branch pipe 4 is provided between the refrigerant filling device 10 and the conduit 3. A first valve body 8 is connected in series on the branch pipe 4. A second valve body is connected in series between the interface of the conduit 3 connecting the branch pipe 4 and the evaporator 2.

[0134] In this embodiment, by providing the pusher 6 in the refrigerant filling device 10 that can adjust the volume of the cavity, the circulation volume of the refrigerant in the circulation loop can be dynamically adjusted during the execution of the drying instruction. Furthermore, the power consumption of the circulation loop can be reduced, and the drying efficiency of the heat pump drying device is improved.

[0135] The above are only preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the technical content prompted above within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A control method for a heat pump drying device, the heat pump drying device including a refrigerant circulation circuit, Characterized in that, The control method includes the following steps: Obtain the load in the heat pump drying device; Control the refrigerant circulation volume in the refrigerant circulation circuit to correspond to the obtained load.

2. The control method for a heat pump drying device according to claim 1, Characterized in that, Preset that the processing module of the heat pump drying device has a refrigerant circulation volume corresponding to the load, After obtaining the load in the heat pump drying device, obtain the refrigerant circulation volume in the refrigerant circulation circuit, Judge whether the obtained refrigerant circulation volume is the same as the refrigerant circulation volume in the processing module. If not, control to adjust the refrigerant circulation volume in the refrigerant circulation circuit to be the same as the refrigerant circulation volume in the processing module.

3. The control method for a heat pump drying device according to claim 1 or 2, Characterized in that, Obtain the initial load in the heat pump drying device before starting drying. After controlling the refrigerant circulation volume in the refrigerant circulation circuit to correspond to the initial load, start drying.

4. The control method for a heat pump drying device according to claim 3, Characterized in that, During the drying process, as the drying process progresses, control the refrigerant circulation volume in the refrigerant circulation circuit to gradually decrease.

5. The control method for a heat pump drying device according to claim 4, Characterized in that, Real-time detect the load in the heat pump drying device, calculate the change rate of the load, and control the change rate of the refrigerant circulation volume in the refrigerant circulation circuit to be equal to the change rate of the load.

6. The control method for a heat pump drying device according to claim 5, Characterized in that, The heat pump drying device includes a refrigerant filling device communicated with the refrigerant circulation circuit, Controlling the refrigerant circulation volume in the refrigerant circulation circuit includes: controlling the refrigerant filling device to inject refrigerant into the refrigerant circulation circuit to increase the refrigerant circulation volume, or controlling the refrigerant filling device to extract refrigerant from the refrigerant circulation circuit to reduce the refrigerant circulation volume.

7. The control method for a heat pump drying device according to claim 6, Characterized in that, The heat pump drying device includes a first valve body provided at the inlet of the refrigerant filling device and a second valve body provided in the refrigerant circulation circuit; When injecting refrigerant into the refrigerant circulation circuit, control the first valve body and the first valve body to open simultaneously; when extracting refrigerant from the refrigerant circulation circuit, control the first valve body to open and the second valve body to close.

8. A heat pump drying device adopting the control method according to any one of claims 1-7, including a refrigerant circulation circuit, Characterized in that, A refrigerant filling device (10) is provided in the circulation circuit. The refrigerant filling device (10) includes a tank body (5) having a cavity and a propeller (6) embedded in the cavity. The propeller (6) can slide in the tank body (5) to change the volume of the cavity communicated with the circulation circuit.

9. The heat pump drying device according to claim 8, Characterized in that, A condenser (1) and an evaporator (2) are provided in the circulation circuit, and the refrigerant filling device (10) is arranged on a conduit (3) connecting the condenser (1) and the evaporator (2).

10. A heat pump drying device according to claim 9, characterized in that, a branch pipe (4) is provided between the refrigerant filling device (10) and the conduit (3), a first valve body (7) is connected in series on the branch pipe (4), and a second valve body (8) is connected in series between the interface of the conduit (3) connecting the branch pipe (4) and the evaporator (2).

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