Clothes processing equipment and control method thereof

Abstract

The embodiment of the invention provides clothes treating equipment and a control method thereof.The clothes treating equipment comprises a clothes treating barrel, a circulating air duct and a heat pump system, the heat pump system comprises an evaporator, a condenser, a heat exchanger and a throttling device, the throttling device is provided with a throttling part, the heat pump system has a first state and a second state, and in the first state, the heat exchanger is connected with the evaporator; the throttling part is located on the upstream of the heat exchanger and the evaporator in the refrigerant flowing direction, and the condenser is located on the upstream of the throttling part in the refrigerant flowing direction. And in the second state, the condenser and the heat exchanger are located on the upstream of the throttling part in the refrigerant flowing direction, and the evaporator is located on the downstream of the throttling part in the refrigerant flowing direction. According to the clothes treatment equipment provided by the embodiment of the invention, the heat exchanger can be used as an evaporator structure or a condenser structure as required, and the heat exchange area for condensation dehumidification and the heat exchange area for heating in the drying process of the heat pump system are adjusted, so that the clothes drying performance of the clothes treatment equipment is improved.

Description

Technical Field

[0001] This application relates to the technical field of clothing treatment, and particularly to a clothing treatment device and a control method thereof. Background Art

[0002] Taking a heat pump dryer as an example of a clothing treatment device, the heat pump dryer includes a condenser and an evaporator. After the drying hot air flow exchanges heat and moisture with the clothes, it becomes a hot and humid air flow, absorbs heat and reduces temperature at the evaporator, and becomes a low-temperature drying air flow. Then it absorbs heat and increases temperature at the condenser to form a drying hot air flow, and exchanges heat and moisture with the clothes again, so as to complete the drying of the clothes. In the early stage of drying, the moisture content of the air flow is relatively large, and a larger heat exchange area of the evaporator is required. In the later stage of drying, a larger heat exchange area of the condenser is required to achieve the purpose of rapid drying.

[0003] In the related art, the heat pump dryer adopts a larger evaporator and a larger condenser. On the one hand, the use cost is increased. On the other hand, the larger heat exchange area of the condenser in the early stage of drying easily causes the air flow to heat up slowly, and the larger heat exchange area of the evaporator in the later stage of drying easily increases energy loss. Summary of the Invention

[0004] In view of this, the embodiments of this application are expected to provide a clothing treatment device and a control method thereof, which can use the heat exchanger as an evaporator structure or a condenser structure according to needs, so as to adjust the heat exchange area for condensation and dehumidification and the heat exchange area for heating in the drying process of the entire clothing treatment device to match the requirements of different drying stages and improve the clothes drying performance.

[0005] To achieve the above object, the technical solution of the embodiments of this application is realized as follows:

[0006] The embodiments of this application provide a clothing treatment device, including:

[0007] A clothing treatment cylinder having a clothing treatment cavity;

[0008] A circulation air duct communicating with the clothing treatment cavity;

[0009] A heat pump system including a compressor, an evaporator, a condenser, a heat exchanger and a throttling device. The evaporator, the heat exchanger and the condenser are arranged in the circulation air duct along the air flow direction, and the throttling device has a throttling part;

[0010] The heat pump system has a first state and a second state. In the first state, the throttling part is located upstream of the heat exchanger and the evaporator along the refrigerant flow direction, and the condenser is located upstream of the throttling part along the refrigerant flow direction, so that the heat exchanger and the evaporator condense and dehumidify the air flow. In the second state, the condenser and the heat exchanger are located upstream of the throttling part along the refrigerant flow direction, and the evaporator is located downstream of the throttling part along the refrigerant flow direction, so that the heat exchanger and the condenser heat the air flow.

[0011] In some embodiments, the throttling device includes a first throttling member and a second throttling member, and the first throttling member is arranged on the refrigerant return line between the evaporator and the heat exchanger;

[0012] In the first state, the first throttling member is in a non-throttling state, the second throttling member is located upstream of the evaporator and the heat exchanger along the refrigerant flow direction, and is in a throttling state;

[0013] In the second state, the first throttling member is in a throttling state, and the second throttling member is in a non-throttling state.

[0014] In some embodiments, the second throttling member is arranged on the refrigerant return line between the heat exchanger and the condenser, the suction port of the compressor is communicated with the outlet of the evaporator, and the discharge port of the compressor is communicated with the inlet of the condenser.

[0015] In some embodiments, the opening degree of the first throttling member is adjustable, and is used to throttle or not throttle the refrigerant on the refrigerant return line between the heat exchanger and the evaporator.

[0016] In some embodiments, the opening degree of the second throttling member is adjustable, and is used to throttle or not throttle the refrigerant on the refrigerant return line between the condenser and the heat exchanger.

[0017] In some embodiments, the first throttling member is an electronic expansion valve; and / or, the second throttling member is an electronic expansion valve.

[0018] In some embodiments, the refrigerant return line between the evaporator and the heat exchanger includes a first branch and a second branch arranged in parallel. The heat pump system further includes a first switching valve. The first throttling member is arranged on the first branch, and the first switching valve is used to switch the refrigerant to the first branch or the second branch.

[0019] In some embodiments, the refrigerant circuit between the condenser and the heat exchanger includes a third branch and a fourth branch arranged in parallel. The heat pump system further includes a second switching valve. The second throttling member is disposed on the third branch. The second switching valve is configured to switch the refrigerant to the third branch or the fourth branch.

[0020] In some embodiments, the first throttling member is a capillary tube, and / or the second throttling member is a capillary tube.

[0021] In some embodiments, the heat pump system includes a reversing valve having a first port, a second port, a third port, and a fourth port. The first port is in communication with the outlet of the condenser. The second port is in communication with the evaporator. The second throttling member is disposed on the refrigerant return path between the second port and the evaporator. The third port is in communication with the suction port of the compressor. The fourth port is in communication with the heat exchanger.

[0022] In the first state, the first port is in communication with the second port, the third port is in communication with the fourth port, and the first throttling member is in a non-throttling state while the second throttling member is in a throttling state. In the second state, the first port is in communication with the fourth port, the second port is in communication with the third port, and the first throttling member is in a throttling state while the second throttling member is in a non-throttling state.

[0023] The embodiment of the present application provides a control method for a laundry treatment device, which is applied to the laundry treatment device according to any embodiment of the present application. The control method includes:

[0024] Running a drying program;

[0025] Obtaining the operating parameters of the laundry treatment device, where the operating parameters include the degree of drying of the laundry and / or the running duration of the drying program;

[0026] Determining whether the operating parameters are less than a first preset value; if so, controlling the heat pump system to execute the first state; if not, controlling the heat pump system to execute the second state.

[0027] In some embodiments, the control method further includes:

[0028] Determining whether the operating parameters reach a second preset value; if so, ending the drying program; if not, controlling the heat pump system to maintain the second state; where the second preset value is greater than the first preset value.

[0029] The laundry treatment device provided by the embodiment of the present application enables the heat pump system to switch between a first state and a second state, so that the heat exchanger switches between a condensation dehumidification function and a heating function. When rapid condensation dehumidification is required, the heat pump system is in the first state, and the heat exchanger acts as an evaporator structure to increase the heat exchange area of the heat pump system for condensation dehumidification and enhance the dehumidification capacity. When rapid drying of clothes is needed, the heat pump system is in the second state, and the heat exchanger acts as a condenser structure to increase the heat exchange area of the heat pump system for heating the air flow, so as to quickly heat the air flow and thus accelerate the drying of the clothes. In this way, the heat exchanger can be used as an evaporator structure or a condenser structure as needed to adjust the heat exchange area of the heat pump system for condensation dehumidification and the heat exchange area for heating during the drying process, thereby improving the drying performance of the laundry treatment device and reducing the probability of high cost and high energy consumption in the related art due to the use of a large-area evaporator and a large-area condenser. Description of the Drawings

[0030] Figure 1 It is a schematic diagram of the laundry treatment device according to the first embodiment of the present application. The dotted arrows in the figure indicate the air flow direction, and the solid arrows in the figure indicate the refrigerant flow direction;

[0031] Figure 2 It is a schematic diagram of the laundry treatment device according to the second embodiment of the present application. Among them, the heat pump system is in the first state. The dotted arrows in the figure indicate the air flow direction, and the solid arrows in the figure indicate the refrigerant flow direction;

[0032] Figure 3 It is another schematic diagram of the laundry treatment device according to the second embodiment of the present application. Among them, the heat pump system is in the second state. The dotted arrows in the figure indicate the air flow direction, and the solid arrows in the figure indicate the refrigerant flow direction;

[0033] Figure 4 It is a schematic diagram of the laundry treatment device according to the third embodiment of the present application. Among them, the heat pump system is in the first state. The dotted arrows in the figure indicate the air flow direction, and the solid arrows in the figure indicate the refrigerant flow direction;

[0034] Figure 5 It is another schematic diagram of the laundry treatment device according to the third embodiment of the present application. Among them, the heat pump system is in the second state. The dotted arrows in the figure indicate the air flow direction, and the solid arrows in the figure indicate the refrigerant flow direction;

[0035] Figure 6 It is a schematic diagram of the laundry treatment device according to the fourth embodiment of the present application. Among them, the heat pump system is in the first state. The dotted arrows in the figure indicate the air flow direction, and the solid arrows in the figure indicate the refrigerant flow direction;

[0036] Figure 7Another schematic diagram of the laundry treatment device according to the fourth embodiment of the present application, wherein the heat pump system is in the second state, the dotted arrows in the figure indicate the air flow direction, and the solid arrows in the figure indicate the refrigerant flow direction;

[0037] Figure 8 A schematic diagram of an implementation process of the control method for the laundry treatment device provided by the present application;

[0038] Figure 9 Another schematic diagram of an implementation process of the control method for the laundry treatment device provided by the present application;

[0039] Figure 10 Another schematic diagram of an implementation process of the control method for the laundry treatment device provided by the present application;

[0040] Figure 11 A schematic diagram of the control process of the control method for the laundry treatment device according to the first embodiment of the present application;

[0041] Figure 12 Another schematic diagram of the control process of the control method for the laundry treatment device according to the first embodiment of the present application;

[0042] Figure 13 A schematic diagram of the control process of the control method for the laundry treatment device according to the second embodiment of the present application;

[0043] Figure 14 A schematic diagram of the control process of the control method for the laundry treatment device according to the fourth embodiment of the present application.

[0044] Description of reference numerals

[0045] 1 - Laundry treatment drum; 1a - Circulation air duct; 2 - Heat pump system; 20 - Compressor; 21 - Condenser; 22 - Heat exchanger; 23 - Evaporator; 24 - First throttling element; 25 - Second throttling element; 26 - First switching valve; 27 - Second switching valve; 28 - Reversing valve; 28a - First port; 28b - Second port; 28c - Third port; 28d - Fourth port. Detailed implementation manners

[0046] In the following description, the terms "first / second / third / fourth" involved are only used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third / fourth" can be interchanged with a specific order or sequence when permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0047] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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 a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] An embodiment of the present application provides a laundry treatment device. Please refer to Figures 1 to 7 , which includes a laundry treatment drum 1, a circulating air duct 1a, and a heat pump system 2.

[0049] It should be noted that the specific type of the laundry treatment device is not limited. It can be an all-in-one washer-dryer, a dryer, etc. In the embodiment of the present application, the laundry treatment device is taken as a heat pump dryer as an example for description.

[0050] The laundry treatment drum 1 has a laundry treatment cavity. The circulating air duct 1a is communicated with the laundry treatment cavity, and the air flow circulates in the circulating air duct 1a and the laundry treatment cavity.

[0051] The heat pump system 2 includes a compressor 20, an evaporator 23, a condenser 21, a heat exchanger 22, and a throttling device.

[0052] The heat pump system 2 is a system that uses a refrigerant for heat exchange circulation. The compressor 20 is used to compress the refrigerant. The compressor 20 has a suction port and a discharge port. The compressor 20 sucks in the refrigerant with a lower temperature and a lower pressure from the suction port, and compresses the refrigerant by driving a piston through the operation of an electric motor. The evaporator 23 is used to heat up the refrigerant, and the condenser 21 is used to cool down the refrigerant.

[0053] It can be understood that the so-called refrigerant, also known as the refrigerant medium or refrigerant, is the medium substance used by the heat pump system 2 to complete the heat exchange circulation.

[0054] The evaporator 23, the heat exchanger 22, and the condenser 21 are arranged in the circulating air duct 1a along the air flow direction. That is to say, after the air flow leaves the laundry treatment cavity, it contacts the evaporator 23, the heat exchanger 22, and the condenser 21 in sequence and exchanges heat, and then enters the laundry treatment cavity again.

[0055] Specifically, when drying clothes, the drying hot air flows into the clothes treatment cavity through the circulation air duct 1a. In the clothes treatment cavity, the drying hot air flows through the surface of the wet clothes, conducts heat and moisture exchange with the wet clothes, absorbs the moisture in the clothes, and becomes hot and humid air. The hot and humid air leaves the clothes treatment cavity through the circulation air duct 1a and flows through the evaporator 23. At the evaporator 23, the hot and humid air is cooled by heat absorption, and becomes low-temperature drying air. Then, after heat exchange through the heat exchanger 22, the low-temperature drying air flows to the condenser 21. At the condenser 21, the low-temperature drying air absorbs heat and increases in temperature, becoming drying hot air. The drying hot air re-enters the clothes treatment cavity through the circulation air duct 1a. In this way, it circulates to achieve continuous and efficient drying of the clothes.

[0056] It should be noted that heat exchange occurs when the air flows through the heat exchanger 22. This heat exchange can be that the air is cooled by heat absorption at the heat exchanger 22, or the air absorbs heat at the heat exchanger 22.

[0057] The throttling device has a throttling part. The heat pump system 2 includes a first state and a second state. In the first state, the throttling part is located upstream of the heat exchanger 22 and the evaporator 23 along the refrigerant flow direction, and the condenser 21 is located upstream of the throttling part along the refrigerant flow direction, so that the heat exchanger 22 and the evaporator 23 condense and dehumidify the air; in the second state, the condenser 21 and the heat exchanger 22 are located upstream of the throttling part along the refrigerant flow direction, and the evaporator 23 is located downstream of the throttling part along the refrigerant flow direction, so that the heat exchanger 22 and the condenser 21 heat the air.

[0058] It should be noted that the so-called throttling part refers to the structure or component of the throttling device that throttles and reduces the pressure of the refrigerant.

[0059] Specifically, in the first state, the refrigerant first flows through the condenser 21, then through the throttling part, and then through the heat exchanger 22 and the evaporator 23. Here, the refrigerant exchanges heat and cools down at the condenser 21, and after being throttled and depressurized by the throttling part, it exchanges heat and warms up at the heat exchanger 22 and the evaporator 23. The heat exchanger 22 acts as an evaporator structure. The air first loses heat and reduces in temperature through the heat exchanger 22 and the evaporator 23, undergoes condensation and dehumidification, and then flows through the condenser 21 to absorb heat and increase in temperature. That is to say, in the first state, the heat pump system 2 has a larger heat exchange area for condensing and dehumidifying the air, so as to better recover the heat of the air and increase the dehumidification capacity.

[0060] For example, in the early stage of drying, the moisture content of the clothes in the clothes treatment drum 1 is relatively large, and the water vapor content in the air is relatively high. The heat pump system 2 can be in the first state, and the heat exchanger 22 and the evaporator 23 jointly condense and dehumidify the air to achieve the purpose of rapid dehumidification.

[0061] It should be noted that in the first state, the throttling part is located upstream of the heat exchanger 22 and the evaporator 23 along the refrigerant flow direction. It can be that the refrigerant first flows through the heat exchanger 22 after passing through the throttling part and then through the evaporator 23; or it can be that the refrigerant first flows through the evaporator 23 after passing through the throttling part and then through the heat exchanger 22.

[0062] In the second state, the refrigerant first flows through the condenser 21 and the heat exchanger 22, and then through the throttling part and the evaporator 23. Here, the heat exchanger 22 acts as a condenser structure. The air flow is first condensed and dehumidified by the evaporator 23, and then flows through the heat exchanger 22 and the condenser 21 to absorb heat and increase the temperature. That is to say, in the second state, the heat exchange area of the heat pump system 2 for heating the air flow is larger, which is convenient for quickly drying clothes.

[0063] For example, in the later stage of drying, when it is necessary to quickly dry clothes, the heat pump system 2 is made to be in the second state. The air flow is first condensed and dehumidified by the evaporator 23, and then exchanges heat and increases the temperature through the heat exchanger 22 and the condenser 21. In this way, the heating speed of the air flow is accelerated through the heat exchanger 22 and the condenser 21, so as to quickly dry the clothes.

[0064] It should be noted that in the second state, the condenser 21 and the heat exchanger 22 being located upstream of the throttling part along the refrigerant flow direction means that the refrigerant first flows through the condenser 21 and the heat exchanger 22 and then through the throttling part. Among them, the refrigerant can first flow through the condenser 21 and then through the heat exchanger 22, or it can first flow through the heat exchanger 22 and then through the condenser 21.

[0065] The clothing treatment device provided by the embodiment of the present application enables the heat pump system 2 to switch between the first state and the second state, so that the heat exchanger 22 switches between the condensation and dehumidification function and the heating function. When rapid condensation and dehumidification are required, the heat pump system 2 is made to be in the first state, and the heat exchanger 22 acts as an evaporator structure to increase the heat exchange area of the heat pump system 2 for condensation and dehumidification and increase the dehumidification capacity. When it is necessary to quickly dry clothes, the heat pump system 2 is made to be in the second state, and the heat exchanger 22 acts as a condenser structure to increase the heat exchange area of the heat pump system 2 for heating the air flow, so as to quickly heat the air flow and thus accelerate the drying of the clothes. In this way, the heat exchanger 22 can be used as an evaporator structure or a condenser structure according to needs, and the heat exchange area of the heat pump system 2 for condensation and dehumidification and the heat exchange area for heating during the drying process can be adjusted, thereby improving the dryness performance of the clothing treatment device and reducing the probability of high cost and high energy consumption in the related art due to the use of a large-area evaporator and a large-area condenser.

[0066] The specific structure of the throttling device is not limited.

[0067] In some embodiments, please refer toFigures 1 to 7 The throttling device includes a first throttling member 24 and a second throttling member 25 . The first throttling member 24 is arranged on the refrigerant circuit between the evaporator 23 and the heat exchanger 22 .

[0068] It should be noted that the refrigerant circuit between the evaporator 23 and the heat exchanger 22 may have only one branch. In this case, the refrigerant may first flow through the evaporator 23, and then flow to the heat exchanger 22 through the first throttling member 24. The first throttling member 24 throttles or non-throttles the refrigerant flowing out of the evaporator 23. The refrigerant may also first flow through the heat exchanger 22, and then flow to the evaporator 23 through the first throttling member 24. The first throttling member 24 throttles or non-throttles the refrigerant flowing out of the heat exchanger 22. Non-throttling here means that the first throttling member 24 allows the refrigerant to flow through, but does not throttle the refrigerant.

[0069] The refrigerant circuit between the evaporator 23 and the heat exchanger 22 may also include multiple branches, and the first throttling device 24 is located on one of the branches. The refrigerant can flow through the branch provided with the first throttling device 24, and the refrigerant can flow to the heat exchanger 22 through the evaporator 23 and the first throttling device 24, or flow to the evaporator 23 through the heat exchanger 22 and the first throttling device 24. The first throttling device 24 throttles or non-throttles the refrigerant flowing out of the evaporator 23 or the heat exchanger 22. Non-throttling here means that the first throttling device 24 allows the refrigerant to flow through, but does not play a throttling role. The refrigerant can also flow through the branch not provided with the first throttling device 24, that is, the refrigerant flows to the heat exchanger 22 through the evaporator 23, or flows to the evaporator 23 through the heat exchanger 22. The first throttling device 24 plays a non-throttling role. Non-throttling here means that the refrigerant does not pass through the first throttling device 24.

[0070] In the first state, the first throttle element 24 is in a non-throttling state, and the second throttle element 25 is located upstream of the evaporator 23 and the heat exchanger 22 along the refrigerant flow direction and is in a throttling state.

[0071] That is to say, in the first state, the throttling part of the throttling device is the second throttling member 25. Specifically, the condenser 21 is located upstream of the second throttling member 25 along the refrigerant flow direction, and the refrigerant first flows through the condenser 21 and then through the second throttling member 25, and then flows to the evaporator 23 and the heat exchanger 22. The second throttling member 25 throttles and reduces the pressure of the refrigerant flowing out of the condenser 21, and the heat exchanger 22 acts as an evaporator structure to condense and dehumidify the airflow. In this way, in the first state, the heat pump system 2 has a large heat exchange area for condensing and dehumidifying the airflow, which is convenient for rapid dehumidification.

[0072] It can be understood that in the first state, the refrigerant throttled by the second throttling member 25 can first flow to the evaporator 23 and then to the heat exchanger 22; or it can first flow to the heat exchanger 22 and then to the evaporator 23.

[0073] It can be understood that in the first state, the first throttling member 24 is in a non-throttling state, which can be a non-throttling state where the refrigerant flows through the first throttling member 24 but the first throttling member 24 does not throttle, or a non-throttling state where the refrigerant does not flow through the first throttling member 24.

[0074] In the second state, the first throttling member 24 is in a throttling state, and the second throttling member 25 is in a non-throttling state.

[0075] That is to say, in the second state, the throttling part of the throttling device is the first throttling member 24. Specifically, the condenser 21 and the heat exchanger 22 are located upstream of the first throttling member 24 along the refrigerant flow direction, and the evaporator 23 is located downstream of the first throttling member 24 along the refrigerant flow direction. The refrigerant first flows through the condenser 21 and then through the heat exchanger 22. The refrigerant flowing out of the heat exchanger 22 is throttled and depressurized by the first throttling member 24 and then flows to the evaporator 23. The heat exchanger 22 acts as a condenser structure to heat the air flow. Thus, in the second state, the heat exchange area of the heat pump system 2 for heating the air flow is relatively large, which is convenient for quickly drying clothes.

[0076] It can be understood that in the second state, the second throttling member 25 is in a non-throttling state, which can be a non-throttling state where the refrigerant flows through the second throttling member 25 but the second throttling member 25 does not throttle, or a non-throttling state where the refrigerant does not flow through the second throttling member 25.

[0077] The arrangement of the first throttling member 24 and the second throttling member 25 is not limited.

[0078] In some embodiments, please refer to Figures 1 to 5 , the second throttling member 25 is arranged on the refrigerant return line between the heat exchanger 22 and the condenser 21. The suction port of the compressor 20 is communicated with the outlet of the evaporator 23, and the discharge port of the compressor 20 is communicated with the inlet of the condenser 21.

[0079] Specifically, the first throttling member 24 is arranged on the refrigerant return line between the evaporator 23 and the heat exchanger 22. The refrigerant return line between the evaporator 23 and the heat exchanger 22 can have only one branch or multiple branches. The refrigerant return line between the heat exchanger 22 and the condenser 21 can have only one branch or multiple branches. Thus, in this embodiment, there are various arrangement situations for the first throttling member 24 and the second throttling member 25.

[0080] In the first type, the refrigerant circuit between the evaporator 23 and the heat exchanger 22 has only one branch, and the refrigerant circuit between the heat exchanger 22 and the condenser 21 has only one branch.

[0081] That is, the refrigerant will flow through the first throttling member 24 and the second throttling member 25. For details, please refer to Figure 1 Along the flow direction of the refrigerant, the exhaust port of the compressor 20, the condenser 21, the second throttle 25, the heat exchanger 22, the first throttle 24, the evaporator 23, and the air intake port of the compressor 20 are sequentially arranged in series. The refrigerant is discharged from the exhaust port of the compressor 20, and returns to the air intake port of the compressor 20 through the condenser 21, the second throttle 25, the heat exchanger 22, the first throttle 24, and the evaporator 23.

[0082] In this embodiment, in the first state, the second throttle 25 is in a throttling state, that is, the second throttle 25 throttles and reduces the pressure of the refrigerant flowing out of the condenser 21, and the first throttle 24 is in a non-throttling state that allows the refrigerant to flow through but does not have a throttling effect. In this way, the heat exchanger 22 acts as an evaporator structure to condense and dehumidify the airflow. In the second state, the second throttle 25 is in a non-throttling state that allows the refrigerant to flow through but does not have a throttling effect, and the first throttle 24 is in a throttling state, throttling and reducing the pressure of the refrigerant flowing out of the heat exchanger 22. In this way, the heat exchanger 22 acts as a condenser structure to heat the airflow.

[0083] In the second type, the refrigerant circuit between the evaporator 23 and the heat exchanger 22 has only one branch, and the circuit between the heat exchanger 22 and the condenser 21 has multiple branches, one of which is provided with a second throttling element 25.

[0084] That is to say, the refrigerant will flow through the first throttling member 24 , but not necessarily through the second throttling member 25 . It is understandable that when the second throttling member 25 is in the throttling state, the refrigerant must flow through the second throttling member 25 .

[0085] Specifically, in the first state, the second throttling device 25 is in a throttling state, at which time the second throttling device 25 throttles and reduces the pressure of the refrigerant flowing out of the condenser 21, and the first throttling device 24 is in a non-throttling state in which the refrigerant is allowed to flow but has no throttling effect. That is, the refrigerant is discharged from the exhaust port of the compressor 20 and returns to the intake port of the compressor 20 through the condenser 21, the second throttling device 25, the heat exchanger 22, the first throttling device 24, and the evaporator 23.

[0086] In the second state, the first throttling member 24 is in a throttling state, throttling and reducing the pressure of the refrigerant flowing out of the heat exchanger 22. After flowing out of the condenser 21, the refrigerant can flow through a branch with a second throttling member 25. The second throttling member 25 is in a non-throttling state where the refrigerant can flow through but does not play a throttling role. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the second throttling member 25, the heat exchanger 22, the first throttling member 24, and the evaporator 23, and then returns to the suction port of the compressor 20. The refrigerant can also flow through a branch without the second throttling member 25. The second throttling member 25 is in a non-throttling state where no refrigerant flows through. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the heat exchanger 22, the first throttling member 24, and the evaporator 23, and then returns to the suction port of the compressor 20.

[0087] Thirdly, the refrigerant circuit between the evaporator 23 and the heat exchanger 22 has multiple branches. One of the branches is provided with the first throttling member 24, and there is only one branch in the circuit between the heat exchanger 22 and the condenser 21.

[0088] That is to say, the refrigerant will flow through the second throttling member 25, but not necessarily through the first throttling member 24. It can be understood that when the first throttling member 24 is in a throttling state, the refrigerant must flow through the first throttling member 24.

[0089] Specifically, in the first state, please refer to Figure 4 , the second throttling member 25 is in a throttling state, throttling and reducing the pressure of the refrigerant flowing out of the condenser 21. After flowing out of the heat exchanger 22, the refrigerant can flow through a branch with the first throttling member 24. The first throttling member 24 is in a non-throttling state where the refrigerant can flow through but does not play a throttling role. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the second throttling member 25, the heat exchanger 22, the first throttling member 24, and the evaporator 23, and then returns to the suction port of the compressor 20. The refrigerant can also flow through a branch without the first throttling member 24. The first throttling member 24 is in a non-throttling state where no refrigerant flows through. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the second throttling member 25, the heat exchanger 22, and the evaporator 23, and then returns to the suction port of the compressor 20.

[0090] In the second state, please refer to Figure 5 , the first throttling member 24 is in a throttling state, throttling and reducing the pressure of the refrigerant flowing out of the heat exchanger 22. The second throttling member 25 is in a non-throttling state where the refrigerant can flow through but does not play a throttling role. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the second throttling member 25, the heat exchanger 22, the first throttling member 24, and the evaporator 23, and then returns to the suction port of the compressor 20.

[0091] Fourth, the refrigerant circuit between the evaporator 23 and the heat exchanger 22 has multiple branches, and one of the branches is provided with a first throttling member 24. The circuit between the heat exchanger 22 and the condenser 21 has multiple branches, and one of the branches is provided with a second throttling member 25.

[0092] Specifically, in the first state, please refer to Figure 6 , the second throttling member 25 is in a throttling state to throttle and depressurize the refrigerant flowing out of the condenser 21. After the refrigerant flows out of the heat exchanger 22, it can flow through the branch with the first throttling member 24. The first throttling member 24 is in a non-throttling state where the refrigerant can flow through but does not play a throttling role. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the second throttling member 25, the heat exchanger 22, the first throttling member 24, and the evaporator 23, and then returns to the suction port of the compressor 20. The refrigerant can also flow through the branch without the first throttling member 24. The first throttling member 24 is in a non-throttling state where no refrigerant flows through. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the second throttling member 25, the heat exchanger 22, and the evaporator 23, and then returns to the suction port of the compressor 20.

[0093] In the second state, please refer to Figure 7 , the first throttling member 24 is in a throttling state to throttle and depressurize the refrigerant flowing out of the heat exchanger 22. After the refrigerant flows out of the condenser 21, it can flow through the branch with the second throttling member 25. The second throttling member 25 is in a non-throttling state where the refrigerant can flow through but does not play a throttling role. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the second throttling member 25, the heat exchanger 22, the first throttling member 24, and the evaporator 23, and then returns to the suction port of the compressor 20. The refrigerant can also flow through the branch without the second throttling member 25. The second throttling member 25 is in a non-throttling state where no refrigerant flows through. That is, the refrigerant is discharged from the exhaust port of the compressor 20, passes through the condenser 21, the heat exchanger 22, the first throttling member 24, and the evaporator 23, and then returns to the suction port of the compressor 20.

[0094] In some embodiments, the opening degree of the first throttling member 24 is adjustable to throttle or not throttle the refrigerant circuit between the heat exchanger 22 and the evaporator 23.

[0095] In this embodiment, there is only one branch in the refrigerant circuit between the evaporator 23 and the heat exchanger 22, and the opening degree of the first throttling member 24 is adjustable. That is, the opening degree of the first throttling member 24 can be fully opened to allow the refrigerant to pass through without throttling the refrigerant, or the opening degree of the first throttling member 24 can also be adjusted to throttle the refrigerant flowing out of the heat exchanger 22.

[0096] It can be understood that the above non-throttling means that the refrigerant can pass through the first throttling member 24 but the first throttling member 24 does not play a throttling role.

[0097] In this embodiment, the opening degree of the first throttling member 24 can be adjusted to switch the first throttling member 24 between the throttling state and the non-throttling state, which is convenient for switching the heat pump system 2 between the first state and the second state. Moreover, since the opening degree of the first throttling member 24 is adjustable, it is possible to accurately adjust the flow rate of the refrigerant flowing out of the heat exchanger 22, thereby facilitating the control of the superheat degree of the heat pump system 2 and reducing the energy consumption of the laundry treatment device.

[0098] Exemplarily, the first throttling member 24 can be an electronic expansion valve, which can quickly and accurately control the refrigerant flow rate as needed, with high adjustment accuracy and good stability.

[0099] In some embodiments, the opening degree of the second throttling member 25 is adjustable and is used to throttle or not throttle the refrigerant between the condenser 21 and the heat exchanger 22.

[0100] In this embodiment, there is only one branch in the refrigerant circuit between the condenser 21 and the heat exchanger 22, and the opening degree of the second throttling member 25 is adjustable. That is, the opening degree of the second throttling member 25 can be fully opened to allow the refrigerant to pass through without throttling the refrigerant, or the opening degree of the second throttling member 25 can also be adjusted to throttle the refrigerant flowing out of the condenser 21.

[0101] It can be understood that the above non-throttling means that the refrigerant can pass through the second throttling member 25 but the second throttling member 25 does not play a throttling role.

[0102] In this embodiment, the opening degree of the second throttling member 25 can be adjusted to switch the second throttling member 25 between the throttling state and the non-throttling state, so that the heat pump system 2 can be switched between the first state and the second state. Moreover, since the opening degree of the second throttling member 25 is adjustable, it is possible to accurately adjust the flow rate of the refrigerant flowing out of the condenser 21, thereby facilitating the control of the superheat degree of the heat pump system 2 and reducing the energy consumption of the laundry treatment device.

[0103] Exemplarily, the second throttling member 25 can be an electronic expansion valve.

[0104] It can be understood that in some examples, please refer to Figure 1 Both the first throttling member 24 and the second throttling member 25 are electronic expansion valves, and the heat pump system 2 is switched between the first state and the second state by adjusting the opening degrees of the first throttling member 24 and the second throttling member 25.

[0105] Of course, in other examples, one of the first throttling member 24 and the second throttling member 25 is an electronic expansion valve.

[0106] In some embodiments, please refer to Figures 2 to 5, the refrigerant circuit between the evaporator 23 and the heat exchanger 22 includes a first branch and a second branch arranged in parallel. The heat pump system 2 further includes a first switching valve 26. The first throttling member 24 is arranged on the first branch. The first switching valve 26 is used to switch the refrigerant to the first branch or the second branch.

[0107] In this embodiment, the refrigerant circuit between the evaporator 23 and the heat exchanger 22 includes two branches. The refrigerant is guided to the first throttling member 24 through the first switching valve 26 to achieve throttling, or not guided to the first throttling member 24 to achieve non-throttling.

[0108] Specifically, in the first state, please refer to Figure 2 and Figure 4 , the first switching valve 26 switches the refrigerant to the second branch, so that the refrigerant does not flow through the first throttling member 24. The first throttling member 24 is in a non-throttling state. The refrigerant flowing out of the heat exchanger 22 directly flows to the evaporator 23. In the second state, please refer to Figure 3 and Figure 5 , the first switching valve 26 switches the refrigerant to the first branch, so that the refrigerant flows through the first throttling member 24. The refrigerant flowing out of the heat exchanger 22 is throttled and depressurized by the first throttling member 24 and then flows to the evaporator 23.

[0109] It should be noted that in this embodiment, when the refrigerant flows through the first branch, that is, through the first throttling member 24, the first throttling member 24 adjusts the flow rate of the refrigerant.

[0110] In this embodiment, by setting the first switching valve 26 to switch the refrigerant to the first branch or the second branch, the first throttling member 24 is switched between the throttling state and the non-throttling state. Thus, there is no need to adjust the opening of the first throttling member 24 to switch the working state, and the structure of the first throttling member 24 can be relatively simple.

[0111] Exemplarily, the first throttling member 24 can be a capillary tube, which has a simple structure, low cost, no dynamic components, and does not require external settings such as a power supply and a controller, and has good reliability.

[0112] In some embodiments, please refer to Figure 2 and Figure 3 , the refrigerant circuit between the condenser 21 and the heat exchanger 22 includes a third branch and a fourth branch arranged in parallel. The heat pump system 2 includes a second switching valve 27. The second throttling member 25 is arranged on the third branch. The second switching valve 27 is used to switch the refrigerant to the third branch or the fourth branch.

[0113] In this embodiment, the refrigerant circuit between the condenser 21 and the heat exchanger 22 includes two branches. The refrigerant is guided to the second throttling member 25 through the second switching valve 27 to achieve throttling, or is not guided to the second throttling member 25 to achieve non-throttling.

[0114] Specifically, in the first state, please refer to Figure 2 , the second switching valve 27 switches the refrigerant to the third branch, so that the refrigerant passes through the second throttling member 25. The second throttling member 25 is in a throttling state, throttling and reducing the pressure of the refrigerant flowing out of the condenser 21. The throttled refrigerant then flows to the heat exchanger 22; in the second state, please refer to Figure 3 , the first switching valve 26 switches the refrigerant to the fourth branch, so that the refrigerant does not pass through the second throttling member 25. The second throttling member 25 is in a non-throttling state, and the refrigerant flowing out of the condenser 21 directly flows to the heat exchanger 22.

[0115] It should be noted that in this embodiment, when the refrigerant flows through the third branch, that is, through the second throttling member 25, the second throttling member 25 regulates the flow rate of the refrigerant.

[0116] In this embodiment, by setting the second switching valve 27 to switch the refrigerant to the third branch or the fourth branch, the second throttling member 25 is switched between the throttling state and the non-throttling state. Thus, there is no need to adjust the opening of the second throttling member 25 to switch the working state, and the structure of the second throttling member 25 can be relatively simple.

[0117] Exemplarily, the second throttling member 25 can be a capillary tube, which has a simple structure, low cost, no dynamic components, and does not require external structures such as a power supply and a controller for control, and has good reliability.

[0118] It can be understood that in some examples, please refer to Figure 2 and Figure 3 , both the first throttling member 24 and the second throttling member 25 can be capillary tubes. Exemplarily, the first throttling member 24 is arranged in the first branch, and the second throttling member 25 is arranged in the third branch. In the first state, please refer to Figure 2 , the first switching valve 26 switches the refrigerant to the second branch, and the second switching valve 27 switches the refrigerant to the third branch. Thus, after the refrigerant flowing out of the condenser 21 is throttled and depressurized by the second throttling member 25, it returns to the compressor 20 through the heat exchanger 22 and the evaporator 23; in the second state, please refer to Figure 3 , the first switching valve 26 switches the refrigerant to the first branch, and the second switching valve 27 switches the refrigerant to the fourth branch. Thus, the refrigerant flowing out of the condenser 21 flows through the heat exchanger 22 to the first throttling member 24, is throttled and depressurized, then flows to the evaporator 23 and returns to the compressor 20.

[0119] In some other examples, one of the first throttling component 24 and the second throttling component 25 is a capillary tube, and the other is an electronic expansion valve. For example, please refer to Figure 4 and Figure 5 , the first throttling component 24 is a capillary tube, the second throttling component 25 is an electronic expansion valve, the first throttling component 24 is arranged on the first branch. In the first state, please refer to Figure 4 , the first switching valve 26 switches the refrigerant to the second branch, and the opening degree of the second throttling component 25 is not fully open to be in a throttling state; in the second state, please refer to Figure 5 , the opening degree of the second throttling component 25 is fully open, the first switching valve 26 switches the refrigerant to the first branch, so that the first throttling component 24 throttles and reduces the pressure of the refrigerant.

[0120] In some embodiments, please refer to Figure 6 and Figure 7 , the heat pump system 2 includes a reversing valve 28. The reversing valve 28 has a first port 28a, a second port 28b, a third port 28c and a fourth port 28d. The first port 28a is communicated with the outlet of the condenser 21, the second port 28b is communicated with the evaporator 23, the second throttling component 25 is arranged on the refrigerant return path between the second port 28b and the evaporator 23, the third port 28c is communicated with the suction port of the compressor 20, and the fourth port 28d is communicated with the heat exchanger 22.

[0121] In the first state, the first port 28a is communicated with the second port 28b, the third port 28c is communicated with the fourth port 28d, and the first throttling component 24 is in a non-throttling state, and the second throttling component 25 is in a throttling state.

[0122] In the second state, the first port 28a is communicated with the fourth port 28d, the second port 28b is communicated with the third port 28c, and the first throttling component 24 is in a throttling state, and the second throttling component 25 is in a non-throttling state.

[0123] Specifically, in the first state, please refer to Figure 6 , the refrigerant flowing out of the condenser 21 flows through the first port 28a and the second port 28b to the second throttling component 25, flows through the second throttling component 25 and throttles and then flows to the evaporator 23. The refrigerant flowing out of the evaporator 23 flows through the first throttling component 24 to the heat exchanger 22. The first throttling component 24 is in a non-throttling state where the refrigerant can flow through but not throttle. The heat exchanger 22 acts as an evaporator structure to condense and dehumidify the air flow. The refrigerant flowing out of the heat exchanger 22 returns to the compressor 20 through the fourth port 28d and the third port 28c.

[0124] In the second state, please refer to Figure 7, the refrigerant flowing out of the condenser 21 flows through the first port 28a and the fourth port 28d to the heat exchanger 22. The refrigerant flowing out of the heat exchanger 22 flows through the first throttling member 24 and then flows to the evaporator 23, and then flows through the second throttling member 25 to the second port 28b and the third port 28c and thus returns to the compressor 20. The second throttling member 25 is in a non-throttling state where the refrigerant can flow through but is not throttled. The heat exchanger 22 acts as a condenser structure and heats the air flow.

[0125] In this embodiment, by switching the connection mode of the reversing valve 28, the connection modes of the compressor 20, the evaporator 23, the heat exchanger 22, the condenser 21, the first throttling member 24, and the second throttling member 25 are adjusted, so that the heat exchanger 22 switches between two working states of heat absorption and heat release, thereby enabling the heat pump system 2 to switch between the first state and the second state. The switching method is simple and it is convenient to adjust the working state of the heat exchanger 22 as needed, thereby improving the drying performance of the clothing treatment device.

[0126] Exemplarily, please refer to Figure 6 and Figure 7 , the first throttling member 24 and the second throttling member 25 can be one-way throttling valves, and the one-way throttling valve has a conducting port and a throttling port.

[0127] In the first state, the refrigerant is input from the throttling port of the second throttling member 25 and output from the conducting port. In this way, the second throttling member 25 is in a throttling state. The refrigerant is input from the conducting port of the first throttling member 24 and output from the throttling port. In this way, the first throttling member 24 is in a non-throttling state; in the second state, the refrigerant is input from the conducting port of the second throttling member 25 and output from the throttling port. In this way, the second throttling member 25 is in a non-throttling state. The refrigerant is input from the throttling port of the first throttling member 24 and output from the conducting port, and the first throttling member 24 is in a throttling state.

[0128] The structure of the one-way throttling valve is simple, which is convenient for manufacturing and maintenance, and has a low usage cost.

[0129] The embodiment of the present application provides a control method for a clothing treatment device, which is applied to the clothing treatment device of any embodiment of the present application. Please refer to Figure 8 , the control method includes the following steps.

[0130] Step 101: Run the drying program.

[0131] Step 102: Obtain the operating parameters of the clothing treatment device, where the operating parameters include the drying degree of the clothing and / or the running duration of the drying program.

[0132] Step 103: Determine whether the operating parameter is less than a first preset value. If so, control the heat pump system 2 to execute the first state. If not, control the heat pump system 2 to execute the second state.

[0133] Here, running the drying program means that the laundry treatment device is powered on and in a state of drying the laundry.

[0134] Here, the degree of laundry drying is the degree of drying of the laundry, which is used to characterize the drying state of the laundry. When the operating parameter is the degree of laundry drying, the first preset value is the preset laundry drying value; when the operating parameter is the running duration of the drying program, the first preset value is the preset running duration.

[0135] If the operating parameter is less than the first preset value, that is, the degree of laundry drying is at a small value or the running duration is short. At this time, rapid dehumidification is required, and the heat pump system 2 is controlled to execute the first state, so that the heat exchanger 22 and the evaporator 23 jointly perform condensation dehumidification on the air flow to rapidly dehumidify.

[0136] If the operating parameter is not less than the first preset value, that is, the degree of laundry drying is at a large value or the running duration is long. At this time, rapid drying of the laundry is required, and the heat pump system 2 is controlled to execute the second state, so that the heat exchanger 22 and the condenser 21 jointly heat the air flow to accelerate the heating speed of the air flow, thereby rapidly drying the laundry.

[0137] In some embodiments, the control method further includes:

[0138] Determine whether the operating parameter reaches the second preset value. If so, end the drying program; if not, control the heat pump system to maintain the second state.

[0139] Wherein, the second preset value is greater than the first preset value.

[0140] Here, when the operating parameter is the degree of laundry drying, the second preset value can be the preset laundry drying value when the laundry is in a dry state. When the operating parameter is the running duration of the drying program, the second preset value can be the target duration required for one execution of the drying program.

[0141] When the operating parameter reaches the second preset value, that is, it indicates that the laundry is in a dry state or the running duration reaches the set target duration, the drying program can be ended and the laundry can be taken out.

[0142] It can be understood that after controlling the heat pump system 2 to execute the second state, the operating parameter is compared with the second preset value. If the operating parameter is less than the second preset value, the heat pump system 2 is controlled to maintain the second state until the operating parameter reaches the second preset value.

[0143] In some examples, the operating parameter is the degree of laundry drying, and the implementation process of the control method is as Figure 9 shown.

[0144] Step 201: Run the drying program.

[0145] Step 202: Obtain the drying degree of the clothes in the clothes processing device.

[0146] Here, the drying degree of the clothes refers to the drying program of the clothes, which characterizes the drying state of the clothes.

[0147] Step 203: Determine whether the drying degree of the clothes is less than a first preset value. If so, execute Step 204; if not, execute Step 205.

[0148] Here, the first preset value is a preset drying value for the clothes. By comparing the current drying degree of the clothes with the preset drying value, the working state of the heat pump system 2 is controlled to switch.

[0149] Step 204: Control the heat pump system 2 to execute the first state.

[0150] Here, the current drying degree of the clothes is less than the first preset value, that is, the humidity of the clothes is relatively high. The heat pump system 2 executes the first state, enabling the heat exchanger 22 and the evaporator 23 to jointly perform condensation dehumidification on the air flow to quickly dehumidify.

[0151] Step 205: Control the heat pump system 2 to execute the second state.

[0152] Here, the current drying degree of the clothes is not less than the first preset value. That is, control the heat pump system 2 to execute the second state, and the heat exchanger 22 and the condenser 21 jointly heat the air flow to quickly dry the clothes.

[0153] Step 206: Determine whether the drying degree of the clothes reaches a second preset value. If so, execute Step 207; if not, execute Step 205.

[0154] Here, the second preset value is a preset drying value when the clothes are in a dry state. If the clothes are not completely dried, control the heat pump system 2 to maintain the second state and continue to perform rapid drying.

[0155] Step 207: End the drying program.

[0156] Here, if the drying degree of the clothes reaches the second preset value, that is, the clothes are in a dried state, then end the drying program.

[0157] In some other examples, the operating parameter is the operating duration of the drying program, and the implementation process of the control method is as Figure 10 shown.

[0158] Step 301: Run the drying program.

[0159] Step 302: Obtain the operating duration of the drying program of the clothes processing device.

[0160] Step 303: Determine whether the running duration is less than a first preset value. If so, execute Step 304; if not, execute Step 305.

[0161] Here, the first preset value is the preset running duration, and the working state of the heat pump system 2 is controlled according to the ratio of the running duration of the current drying program to the preset running duration.

[0162] Step 304: Control the heat pump system 2 to execute the first state.

[0163] Here, the running duration of the current drying program is less than the first preset value, that is, the running duration is short and the humidity of the clothes is still high. The heat pump system 2 executes the first state, and the heat exchanger 22 and the evaporator 23 jointly perform condensation dehumidification on the air flow to quickly dehumidify.

[0164] Step 305: Control the heat pump system 2 to execute the second state.

[0165] Here, the running duration of the current drying program is not less than the first preset value, that is, control the heat pump system 2 to execute the second state, and the heat exchanger 22 and the condenser 21 jointly heat the air flow to quickly dry.

[0166] Step 306: Determine whether the running duration reaches a second preset value. If so, execute Step 307; if not, execute Step 305.

[0167] Here, the second preset value is the target duration required for executing a drying program once. If the current running duration is less than the second preset value, control the heat pump system 2 to maintain the second state and continue to perform quick drying.

[0168] Step 307: End the drying program.

[0169] Here, if the current running duration reaches the second preset value, that is, end the drying program.

[0170] Please refer to Figure 1 , and in combination with the first embodiment, the control method of the clothing treatment device according to the embodiment of the present application is illustrated by way of example. Among them, the first throttle member 24 and the second throttle member 25 are electronic expansion valves.

[0171] When the operating parameter is the running duration of the drying program, the specific steps of the control method are as Figure 11 shown.

[0172] Step 401: Run the drying program.

[0173] Step 402: Obtain the running duration of the drying program of the clothing treatment device.

[0174] Step 403: Determine whether the running duration is less than the first preset value. If so, execute Step 404; if not, execute Step 407.

[0175] Step 404: Control the first throttle member 24 to be fully open and throttle the second throttle member 25.

[0176] Here, if the current running duration is less than the first preset value, the heat pump system 2 is made to be in the first state by adjusting the opening degrees of the first throttle member 24 and the second throttle member 25. Here, control the opening degree of the first throttle member 24 to be fully open, that is, in a non-throttling state, and adjust the opening degree of the second throttle member 25 to make the second throttle member 25 in a throttling state.

[0177] Step 405: Determine whether the superheat degree of the heat pump system 2 reaches the first target value. If so, execute Step 403; if not, execute Step 406.

[0178] Here, the current superheat degree of the heat pump system 2 can be determined by obtaining the temperature and pressure of the refrigerant at the suction port and the discharge port of the compressor 20. The first target value is the superheat degree preset in advance when the heat pump system 2 is in the first state.

[0179] It can be understood that in the early stage of drying, the moisture content of the clothes is relatively large, the water vapor content in the air flow is relatively high, and the superheat degree of the heat pump system 2 is also relatively low. Therefore, making the heat pump system 2 in the first state, the heat exchanger 22 acts as an evaporator structure to perform rapid dehumidification, and can also increase the superheat degree of the heat pump system 2.

[0180] If the current superheat degree of the heat pump system 2 reaches the first target value, continue to determine whether the running duration is less than the first preset value. If the current superheat degree of the heat pump system 2 does not reach the first target value, it indicates that the current superheat degree of the heat pump system 2 has not reached the target state.

[0181] Step 406: Adjust the opening degree of the second throttle member 25.

[0182] Here, the opening degree of the second throttle member 25 can be adjusted to precisely adjust the flow rate of the refrigerant flowing out of the condenser 21, thereby adjusting the superheat degree of the heat pump system 2 to reach the first target value.

[0183] Step 407: Throttle the first throttle member 24 and control the second throttle member 25 to be fully open.

[0184] Here, if the current running duration is not less than the first preset value, the heat pump system 2 is made to be in the second state by adjusting the opening degrees of the first throttle member 24 and the second throttle member 25. Here, adjust the opening degree of the first throttle member 24 to make the first throttle member 24 in a throttling state, and control the opening degree of the second throttle member 25 to be fully open, that is, in a non-throttling state.

[0185] Step 408: Determine whether the superheat degree of the heat pump system 2 reaches the second target value. If so, execute Step 410; if not, execute Step 409.

[0186] Here, the current superheat degree of the heat pump system 2 can be determined by obtaining the temperature and pressure of the refrigerant at the suction port and discharge port of the compressor 20. The second target value is the superheat degree of the heat pump system 2 in the second state preset in advance.

[0187] It can be understood that in the later stage of drying, when the current operation duration is not less than the first preset value, the heat exchanger 22 acts as a condenser structure to heat the air flow to quickly dry the clothes. It is necessary to control the superheat degree of the heat pump system 2 to reduce the energy consumption of the clothes processing equipment.

[0188] Step 409: Adjust the opening degree of the first throttling member 24.

[0189] Here, if the superheat degree of the current heat pump system 2 does not reach the second target value, it indicates that the superheat degree of the current heat pump system 2 has not reached the target state. By adjusting the opening degree of the first throttling member 24, the flow rate of the refrigerant flowing out of the heat exchanger 22 can be accurately adjusted, thereby adjusting the superheat degree of the heat pump system 2 to reach the second target value.

[0190] Step 410: Determine whether the operation duration reaches the second preset value.

[0191] Here, if the superheat degree of the current heat pump system 2 reaches the second target value, it is determined whether the current operation duration reaches the second preset value. The second preset value is the target duration required for executing a drying program preset. If the current operation duration is less than the second preset value, control the heat pump system 2 to maintain the second state.

[0192] Step 411: End the drying program.

[0193] Here, if the current operation duration reaches the second preset value, the drying program is ended.

[0194] When the operation parameter is the clothes drying degree, the specific steps of the control method are as Figure 12 shown.

[0195] Step 501: Execute the drying program.

[0196] Step 502: Obtain the clothes drying degree of the clothes processing equipment.

[0197] Step 503: Determine whether the clothes drying degree is less than the first preset value. If so, execute Step 404; if not, execute Step 407.

[0198] Step 504: Control the first throttling member 24 to be fully open and the second throttling member 25 to throttle.

[0199] Here, if the current dryness of the clothes is less than the first preset value, the heat pump system 2 is put into the first state by adjusting the opening degrees of the first throttle member 24 and the second throttle member 25. Here, the opening degree of the first throttle member 24 is controlled to be fully open, that is, in a non-throttling state, and the opening degree of the second throttle member 25 is adjusted so that the second throttle member 25 is in a throttling state.

[0200] Step 505: Determine whether the superheat degree of the heat pump system 2 reaches the first target value. If so, execute step 403; if not, execute step 406.

[0201] Here, the current superheat degree of the heat pump system 2 can be determined by obtaining the temperature and pressure of the refrigerant at the suction port and the discharge port of the compressor 20. The first target value is the superheat degree of the heat pump system 2 preset in advance when it is in the first state.

[0202] It can be understood that in the early stage of drying, the water content of the clothes is large, the water vapor content in the air flow is high, and the superheat degree of the heat pump system 2 is also low. Therefore, when the heat pump system 2 is in the first state, the heat exchanger 22 acts as an evaporator structure to perform rapid dehumidification, and can also increase the superheat degree of the heat pump system 2.

[0203] If the current superheat degree of the heat pump system 2 reaches the first target value, continue to determine whether the dryness of the clothes is less than the first preset value. If the current superheat degree of the heat pump system 2 does not reach the first target value, it indicates that the current superheat degree of the heat pump system 2 has not reached the target state.

[0204] Step 506: Adjust the opening degree of the second throttle member 25.

[0205] Here, the opening degree of the second throttle member 25 can be adjusted to precisely adjust the flow rate of the refrigerant flowing out of the condenser 21, so as to adjust the superheat degree of the heat pump system 2 to reach the first target value.

[0206] Step 507: Control the first throttle member 24 to throttle and the second throttle member 25 to be fully open.

[0207] Here, if the current dryness of the clothes is not less than the first preset value, the heat pump system 2 is put into the second state by adjusting the opening degrees of the first throttle member 24 and the second throttle member 25. Here, the opening degree of the first throttle member 24 is adjusted so that the first throttle member 24 is in a throttling state, and the opening degree of the second throttle member 25 is controlled to be fully open, that is, in a non-throttling state.

[0208] Step 508: Determine whether the superheat degree of the heat pump system 2 reaches the second target value. If so, execute step 410; if not, execute step 409.

[0209] Here, the temperature and pressure of the refrigerant at the suction port and the discharge port of the compressor 20 can be obtained to determine the current superheat degree of the heat pump system 2, and the second target value is the superheat degree of the heat pump system 2 in the second state preset in advance.

[0210] It can be understood that in the later stage of drying, when the current degree of clothes drying is not less than the first preset value, the heat exchanger 22 acts as a condenser structure to heat the air flow to quickly dry the clothes. It is necessary to control the superheat degree of the heat pump system 2 to reduce the energy consumption of the clothes processing equipment.

[0211] Step 509: Adjust the opening degree of the first throttle member 24.

[0212] Here, if the superheat degree of the current heat pump system 2 does not reach the second target value, it indicates that the superheat degree of the current heat pump system 2 has not reached the target state. By adjusting the opening degree of the first throttle member 24, the flow rate of the refrigerant flowing out of the heat exchanger 22 can be accurately adjusted, so as to adjust the superheat degree of the heat pump system 2 to reach the second target value.

[0213] Step 510: Determine whether the degree of clothes drying has reached the second preset value.

[0214] Here, if the superheat degree of the current heat pump system 2 reaches the second target value, it is determined whether the current degree of clothes drying has reached the second preset value. The second preset value is the drying value when the clothes are in a dry state preset. If the current degree of clothes drying is less than the second preset value, the heat pump system 2 is controlled to maintain the second state.

[0215] Step 511: End the drying program.

[0216] Here, if the current degree of clothes drying reaches the second preset value, the drying program is ended.

[0217] Please refer to Figure 2 and Figure 3 , and in combination with the second embodiment, an example is given to illustrate the control method of the clothes processing equipment of the embodiment of the present application with the operating parameter being the degree of clothes drying. Among them, the first throttle member 24 and the second throttle member 25 are capillary tubes. The first throttle member 24 is arranged on the first branch, and the second throttle member 25 is arranged on the third branch.

[0218] The specific steps of the control method are as Figure 13 shown.

[0219] Step 601: Run the drying program.

[0220] Step 602: Obtain the degree of clothes drying of the clothes processing equipment.

[0221] Step 603: Determine whether the dryness of the clothes is less than the first preset value. If so, execute Step 604; if not, execute Step 605.

[0222] Step 604: Control the first switching valve 26 to switch to the second branch, and the second switching valve 27 to switch to the third branch.

[0223] Here, if the current dryness of the clothes is less than the first preset value, the working state of the heat pump system 2 is adjusted by controlling the first switching valve 26 and the second switching valve 27. The second switching valve 27 switches to the third branch, and the refrigerant flows through the second throttling member 25. The second throttling member 25 is in a throttling state. The first switching valve 26 switches to the second branch, and the refrigerant does not flow through the first throttling member 24. The first throttling member 24 is in a non-throttling state.

[0224] Step 605: Control the first switching valve 26 to switch to the first branch, and the second switching valve 27 to switch to the fourth branch.

[0225] Here, if the current dryness of the clothes is not less than the first preset value, the working state of the heat pump system 2 is adjusted by controlling the first switching valve 26 and the second switching valve 27. The second switching valve 27 switches to the fourth branch, and the refrigerant does not flow through the second throttling member 25. The second throttling member 25 is in a non-throttling state. The first switching valve 26 switches to the first branch, and the refrigerant flows through the first throttling member 24. The first throttling member 24 is in a throttling state.

[0226] Step 606: Determine whether the dryness of the clothes reaches the second preset value.

[0227] Here, if the dryness of the clothes does not reach the second preset value, the first switching valve 26 remains in the state of switching to the first branch, and the second switching valve 27 remains in the state of switching to the fourth branch.

[0228] Step 607: End the drying program.

[0229] Here, if the current dryness of the clothes reaches the second preset value, the drying program is ended.

[0230] Please refer to Figure 6 and Figure 7 , and in combination with the third embodiment, an example is given to illustrate the control method of the clothes processing device according to the embodiment of the present application with the operating parameter being the operating duration of the drying program. Among them, the first throttling member 24 and the second throttling member 25 are one-way throttling valves.

[0231] The specific steps of the control method are as Figure 14 shown.

[0232] Step 701: Run the drying program.

[0233] Step 702: Obtain the running duration of the drying program of the laundry treatment device.

[0234] Step 703: Determine whether the running duration is less than a first preset value. If so, execute Step 704; if not, execute Step 705.

[0235] Step 704: Control the reversing valve 28 to be energized, so that the first port 28a is in communication with the second port 28b, and the third port 28c is in communication with the fourth port 28d.

[0236] Here, if the current running duration is less than the first preset value, the working state of the heat pump system 2 is adjusted by energizing the reversing valve 28. The first port 28a is in communication with the second port 28b, the third port 28c is in communication with the fourth port 28d, the second throttling member 25 is in a throttling state, and the first throttling member 24 is in a non-throttling state.

[0237] Step 705: Control the reversing valve 28 to be de-energized, so that the first port 28a is in communication with the fourth port 28d, and the second port 28b is in communication with the third port 28c.

[0238] Here, if the current running duration is not less than the first preset value, the working state of the heat pump system 2 is adjusted by de-energizing the reversing valve 28. The first port 28a is in communication with the fourth port 28d, the second port 28b is in communication with the third port 28c, the second throttling member 25 is in a non-throttling state, and the first throttling member 24 is in a throttling state.

[0239] Step 706: Determine whether the running duration reaches a second preset value. If so, execute Step 707; if not, execute Step 705.

[0240] Here, if the current running duration does not reach the second preset value, control the reversing valve 28 to remain de-energized.

[0241] Step 707: End the drying program.

[0242] Here, if the current running duration reaches the second preset value, the drying program is ended.

[0243] In the description of the present application, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present application and the features of different embodiments or examples.

[0244] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A laundry treatment device, characterized in that, it includes: A laundry treatment drum having a laundry treatment chamber; A circulation air duct communicating with the laundry treatment chamber; A heat pump system including a compressor, an evaporator, a condenser, a heat exchanger and a throttling device, the evaporator, the heat exchanger and the condenser are arranged in the circulation air duct along the air flow direction, and the throttling device has a throttling part; The heat pump system has a first state and a second state. In the first state, the throttling part is located upstream of the heat exchanger and the evaporator along the refrigerant flow direction, and the condenser is located upstream of the throttling part along the refrigerant flow direction, so that the heat exchanger and the evaporator condense and dehumidify the air flow; In the second state, the condenser and the heat exchanger are located upstream of the throttling part along the refrigerant flow direction, and the evaporator is located downstream of the throttling part along the refrigerant flow direction, so that the heat exchanger and the condenser heat the air flow.

2. The laundry treatment device according to claim 1, characterized in that, The throttling device includes a first throttling member and a second throttling member, and the first throttling member is arranged on the refrigerant return path between the evaporator and the heat exchanger; In the first state, the first throttling member is in a non-throttling state, the second throttling member is located upstream of the evaporator and the heat exchanger along the refrigerant flow direction, and is in a throttling state; In the second state, the first throttling member is in a throttling state, and the second throttling member is in a non-throttling state.

3. The laundry treatment device according to claim 2, characterized in that, The second throttling member is arranged on the refrigerant return path between the heat exchanger and the condenser, the suction port of the compressor is communicated with the outlet of the evaporator, and the discharge port of the compressor is communicated with the inlet of the condenser.

4. The laundry treatment device according to claim 3, characterized in that, The opening degree of the first throttling member is adjustable, and is used to throttle or not throttle the refrigerant on the refrigerant return path between the heat exchanger and the evaporator.

5. The laundry treatment device according to claim 3, characterized in that, The opening degree of the second throttling member is adjustable, and is used to throttle or not throttle the refrigerant on the refrigerant return path between the condenser and the heat exchanger.

6. The laundry treatment device according to claim 4 or 5, characterized in that, The first throttling member is an electronic expansion valve; and / or, the second throttling member is an electronic expansion valve.

7. The laundry treatment device according to claim 3, characterized in that, The refrigerant return path between the evaporator and the heat exchanger includes a first branch and a second branch arranged in parallel. The heat pump system further includes a first switching valve. The first throttling member is arranged on the first branch, and the first switching valve is used to switch the refrigerant to the first branch or the second branch.

8. The laundry treatment device according to claim 3, characterized in that, The refrigerant circuit between the condenser and the heat exchanger includes a third branch and a fourth branch arranged in parallel. The heat pump system further includes a second switching valve. The second throttling member is disposed on the third branch. The second switching valve is configured to switch the refrigerant to the third branch or the fourth branch.

9. The laundry treating apparatus according to claim 7 or 8, wherein, the first throttling member is a capillary tube, and / or the second throttling member is a capillary tube.

10. The laundry treating apparatus according to claim 2, wherein, the heat pump system includes a reversing valve having a first port, a second port, a third port and a fourth port. The first port is communicated with the outlet of the condenser. The second port is communicated with the evaporator. The second throttling member is disposed on the refrigerant circuit between the second port and the evaporator. The third port is communicated with the suction port of the compressor. The fourth port is communicated with the heat exchanger; in the first state, the first port is in communication with the second port, the third port is in communication with the fourth port, and the first throttling member is in a non-throttling state while the second throttling member is in a throttling state; in the second state, the first port is in communication with the fourth port, the second port is in communication with the third port, and the first throttling member is in a throttling state while the second throttling member is in a non-throttling state.

11. A control method for a laundry treating apparatus, applied to the laundry treating apparatus according to any one of claims 1-10, wherein, the control method includes: running a drying program; acquiring the operating parameters of the laundry treating apparatus, wherein the operating parameters include the degree of dryness of the laundry and / or the running duration of the drying program; determining whether the operating parameters are less than a first preset value; if so, controlling the heat pump system to execute the first state; if not, controlling the heat pump system to execute the second state.

12. The control method according to claim 11, wherein, the control method further includes: determining whether the operating parameters reach a second preset value; if so, ending the drying program; if not, controlling the heat pump system to maintain the second state; wherein the second preset value is greater than the first preset value.

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