Laundry treating apparatus and control method thereof

Abstract

The embodiment of the invention relates to clothes treatment equipment and a control method thereof. The clothes treatment equipment comprises a box body, a clothes treatment barrel arranged in the box body and a heat pump heat exchange structure. A heat exchange channel is arranged between the box body and the clothes processing drum, the heat exchange channel is communicated with an inner cavity of the clothes processing drum, and at least part of the heat pump heat exchange structure is arranged in the heat exchange channel; the heat pump heat exchange structure comprises a condenser, an evaporator, a first throttling element and a second throttling element. The first throttling element and the second throttling element are sequentially connected between the condenser and the evaporator in series; and the two ends of the second throttling element are connected in parallel with a control adjusting element capable of being opened and closed, so that the heat exchange efficiency of the clothes treatment equipment is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of household appliances, and particularly to a laundry treatment device and a control method thereof. Background Art

[0002] With the improvement of living standards, laundry treatment devices (such as clothes dryers) have become essential equipment for many families. In related technologies, condensers and evaporators are usually provided in laundry treatment devices such as clothes dryers. Heat exchange is performed between the heat exchange medium flowing in the condenser and the evaporator and the air to achieve effects such as drying or dehumidifying the air, thereby drying the clothes in the clothes dryer. However, the heat exchange efficiency of the laundry treatment devices in related technologies is poor. Summary of the Invention

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, embodiments of the present invention provide a laundry treatment device and a control method thereof.

[0004] In a first aspect, embodiments of the present invention provide a laundry treatment device, including a cabinet, a laundry treatment drum disposed in the cabinet, and a heat pump heat exchange structure;

[0005] There is a heat exchange channel between the cabinet and the laundry treatment drum. The heat exchange channel is communicated with the inner cavity of the laundry treatment drum, and at least part of the heat pump heat exchange structure is disposed in the heat exchange channel;

[0006] The heat pump heat exchange structure includes a condenser, an evaporator, a first throttling member, and a second throttling member; the first throttling member and the second throttling member are sequentially connected in series between the heat exchange medium outlet of the condenser and the heat exchange medium inlet of the evaporator; a controllable opening and closing control adjusting member is connected in parallel at both ends of the second throttling member.

[0007] The laundry treatment device provided by the embodiment of the present invention is provided with a heat pump heat exchange structure, and the heat pump heat exchange structure includes a condenser, an evaporator, a first throttling member and a second throttling member; the first throttling member and the second throttling member are connected in series in sequence between the heat exchange medium outlet of the condenser and the heat exchange medium inlet of the evaporator; a controllable opening and closing control adjusting member is connected in parallel at both ends of the second throttling member. With such a setting, when the control adjusting member is opened, the heat exchange medium flows out after passing through the first throttling member and the control adjusting member in sequence, realizing primary throttling; when the control adjusting member is closed, the heat exchange medium flows out after passing through the first throttling member and the second throttling member in sequence, realizing secondary throttling. That is to say, if the heat exchange efficiency of the laundry treatment device is low, resulting in poor drying effect, such as when used in extremely cold areas or in winter with low temperatures, the control adjusting member is closed, and the heat exchange medium passes through the first throttling member and the second throttling member in sequence to complete secondary throttling and then enters the evaporator. Thereby, to a certain extent, the flow rate of the heat exchange medium entering the evaporator per unit time can be reduced. In this case, when the working power of the evaporator is constant, the heating effect and dehumidifying effect of the evaporator on the air can be improved to a certain extent, which is beneficial to improving the heat exchange efficiency of the laundry treatment device and realizing good drying of the laundry. When the heat exchange efficiency of the laundry treatment device is sufficient and the drying effect is good, the control adjusting member is opened, and the heat exchange medium flows out from the control adjusting member after passing through the first throttling member, completing primary throttling. In this way, while ensuring the heat exchange efficiency and drying efficiency, it can also avoid the situation of damaging the laundry due to too high heat exchange efficiency to a certain extent, and can achieve a certain energy-saving effect. That is to say, by controlling the opening and closing of the control adjusting member to control the throttling times of the heat exchange medium, two-stage pressure regulation can be realized between the condenser and the evaporator, thereby improving the heat exchange efficiency and realizing the rapid drying effect of the laundry and the like.

[0008] In some embodiments, the first throttling member is a capillary tube.

[0009] In some embodiments, the second throttling member is a capillary tube.

[0010] In some embodiments, both the first throttling member and the second throttling member are capillary tubes;

[0011] The length of the first throttling member is greater than the length of the second throttling member.

[0012] In some embodiments, the capillary tube is a spiral structure.

[0013] In some embodiments, the first throttling member is an electronic expansion valve.

[0014] In some embodiments, the second throttling member is an electronic expansion valve.

[0015] In some embodiments, the outlet end of the second throttling member and the heat exchange medium outlet of the control and adjustment member are communicated through an intermediate pipeline; the outlet end of the intermediate pipeline is communicated with the heat exchange medium inlet of the evaporator.

[0016] In some embodiments, the control and adjustment member is a solenoid valve.

[0017] In some embodiments, the heat pump heat exchange structure further includes a compressor, and the compressor is connected between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the condenser;

[0018] A temperature detection member is arranged between the heat exchange medium outlet of the compressor and the heat exchange medium inlet of the condenser. The temperature detection member is electrically connected to the controller of the laundry treatment device. The temperature detection member is used to detect the exhaust temperature of the compressor, and the controller is used to control the control and adjustment member to close when the detected exhaust temperature is less than a preset temperature threshold, and to control the control and adjustment member to open when the detected exhaust temperature is greater than or equal to the preset temperature threshold.

[0019] In some embodiments, the heat pump heat exchange structure further includes a timing member, and the timing member is connected to the controller;

[0020] The timing member is used to start timing when the temperature detected by the temperature detection member is greater than or equal to the preset temperature threshold, and to control the control and adjustment member to open when the timing duration reaches a preset duration.

[0021] In a second aspect, an embodiment of the present invention further provides a control method for the above-mentioned laundry treatment device, and the method includes:

[0022] Determine that the laundry treatment device is started, and control the control and adjustment member to open;

[0023] Detect the exhaust temperature of the compressor at a first moment;

[0024] Determine that the exhaust temperature at the first moment is less than a first preset temperature threshold, and control the control and adjustment member to close.

[0025] In some embodiments, the method further includes:

[0026] Determine that the exhaust temperature at the first moment is greater than or equal to the first preset temperature threshold;

[0027] Determine that the continuous duration for which the exhaust temperature at the first moment is greater than or equal to the first preset temperature threshold reaches a first preset duration, and control the control and adjustment member to open.

[0028] In some embodiments, after the step of determining that the exhaust gas temperature at the first moment is lower than the first preset temperature threshold and controlling the control and adjustment member to close, the method further includes:

[0029] Detecting the exhaust gas temperature of the compressor at a second moment, where the second moment is any moment after the first moment;

[0030] Determining that the exhaust gas temperature at the second moment is greater than or equal to a second preset temperature threshold;

[0031] Determining that the duration for which the exhaust gas temperature at the second moment is greater than or equal to the second preset temperature threshold reaches a second preset duration, and controlling the control and adjustment member to open; wherein the second preset temperature threshold is higher than the first preset temperature threshold. Description of the Drawings

[0032] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the embodiments of the present invention.

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0034] Figure 1 Partial structural schematic diagram of the heat pump heat exchange structure according to the embodiment of the present invention Figure 1 ;

[0035] Figure 2 Partial structural schematic diagram of the heat pump heat exchange structure according to the embodiment of the present invention Figure 2 ;

[0036] Figure 3 Partial structural schematic diagram of the laundry treatment device according to the embodiment of the present invention;

[0037] Figure 4 Flow schematic diagram of the control method of the laundry treatment device according to the embodiment of the present invention.

[0038] Among them, 10 is a heat pump heat exchange structure; 1 is a condenser; 11 is the heat exchange medium inlet of the condenser; 12 is the heat exchange medium outlet of the condenser; 2 is an evaporator; 21 is the heat exchange medium inlet of the evaporator; 22 is the heat exchange medium outlet of the evaporator; 3 is a first throttling member; 4 is a second throttling member; 5 is a control and regulation member; 51 is the heat exchange medium inlet of the control and regulation member; 52 is the heat exchange medium outlet of the control and regulation member; 6 is a compressor; 61 is the heat exchange medium outlet of the compressor; 7 is an intermediate pipeline; 20 is a laundry treatment drum; 30 is a drive structure; 40 is a blower. Detailed implementation manners

[0039] In order to more clearly understand the above objects, features, and advantages of the embodiments of the present invention, the solutions of the embodiments of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] In the following description, many specific details are set forth in order to fully understand the embodiments of the present invention, but the embodiments of the present invention can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all the embodiments.

[0041] Referring to Figures 1 to 4 As shown, this embodiment provides a laundry treatment device. The laundry treatment device includes a cabinet, a laundry treatment drum 20 disposed in the cabinet, and a heat pump heat exchange structure 10.

[0042] Among them, there is a heat exchange channel between the cabinet and the laundry treatment drum 20. The heat exchange channel is communicated with the inner cavity of the laundry treatment drum 20, and at least part of the heat pump heat exchange structure 10 is disposed in the heat exchange channel.

[0043] Exemplarily, the laundry treatment device can be, for example, a washing and drying integrated machine, a dryer, etc. Among them, the laundry treatment device may further include a drive structure 30. The drive structure 30 can be, for example, a drive motor. The laundry treatment drum 20 can be, for example, an inner drum, or the laundry treatment drum 20 includes an inner drum and an outer drum (not shown in the figure) sleeved outside the inner drum, and there is a gap between the outer drum and the inner drum. Among them, the drive structure 30 can drive the inner drum to rotate.

[0044] Exemplarily, for example, a blower 40 can be disposed in the heat exchange channel, the drive structure 30 is electrically connected to the blower 40, and air flows between the heat exchange channel and the laundry treatment drum 20 under the action of the blower 40. The air is heat-exchanged by the heat pump heat exchange structure 10, and then the laundry in the laundry treatment drum 20 is dried.

[0045] Specifically, the heat pump heat exchange structure 10 includes a condenser 1, an evaporator 2, a first throttling member 3, and a second throttling member 4. The first throttling member 3 and the second throttling member 4 are sequentially connected in series between the heat exchange medium outlet 12 of the condenser and the heat exchange medium inlet 21 of the evaporator. A controllable on-off control adjustment member 5 is connected in parallel at both ends of the second throttling member 4.

[0046] Specifically, when the control adjustment member 5 is closed, the heat exchange medium in the condenser 1 sequentially enters the evaporator 2 through the first throttling member 3 and the second throttling member 4. When the control adjustment member 5 is opened, the heat exchange medium in the condenser 1 sequentially enters the evaporator 2 through the first throttling member 3 and the control adjustment member 5.

[0047] Exemplarily, the first throttling member 3 is the main throttling member, and the second throttling member 4 is the auxiliary throttling member. When the control adjustment member 5 is closed, the heat exchange medium in the condenser 1 will enter the evaporator 2 after secondary throttling through the first throttling member 3 and the second throttling member 4 in sequence. Since the second throttling member 4 is connected in parallel with the control adjustment member 5, and the second throttling member 4 has a greater resistance compared to the control adjustment member 5 in the open state, when the control adjustment member 5 is opened, the heat exchange medium in the condenser 1 enters the evaporator 2 through the first throttling member 3 for primary throttling and then through the control adjustment member 5.

[0048] Wherein, when the heat exchange medium enters the evaporator 2 through secondary throttling, a large pressure difference is established between the heat exchange medium outlet 12 of the condenser and the heat exchange medium inlet 21 of the evaporator, and to a certain extent, the flow rate of the heat exchange medium entering the evaporator 2 per unit time is reduced. Thus, when the working power of the evaporator 2 is constant, the heating and dehumidifying effects of the evaporator on the air can be improved to a certain extent, which is beneficial to improving the heat exchange efficiency and realizing good drying of the clothes.

[0049] That is to say, by controlling the opening and closing of the control adjustment member 5, the heat exchange efficiency and drying effect of the clothing treatment device can be adjusted. For example, if the heat exchange efficiency of the clothing treatment device is low, resulting in a poor drying effect, such as in extremely cold regions or in winter with low temperatures, the control adjustment member 5 can be closed to enable the heat exchange medium to complete secondary throttling through the first throttling member 3 and the second throttling member 4 and then enter the evaporator 2, so as to improve the heat exchange efficiency of the clothing treatment device and achieve good drying of the clothes. For another example, when the heat exchange efficiency of the clothing treatment device is sufficient and the drying effect is good, the control adjustment member 5 can be opened. At this time, the heat exchange medium flows out through the control adjustment member 5 after passing through the first throttling member 3, completing primary throttling. In this way, while ensuring the heat exchange efficiency and drying efficiency, it can also avoid the situation of damaging the clothes due to excessive heat exchange efficiency to a certain extent, and can achieve a certain energy-saving effect.

[0050] Exemplarily, Figures 1 to 3The solid arrows represent the circulation flow path of the heat exchange medium. Figure 3 The dashed arrows represent the circulation flow path of the air. Specifically, when the heat pump heat exchange structure 10 operates, the compressor 6 sucks in the low-pressure gaseous heat exchange medium (such as refrigerant). After being compressed by the compressor 6, the heat exchange medium is discharged to the condenser 1 in a high-temperature and high-pressure gaseous state, and exchanges heat with the air entering the heat exchange channel, so that the air is heated. After that, the heat exchange medium is cooled by the air and condenses into a high-pressure liquid, and then successively passes through the first throttling member 3 and the second throttling member 4 for secondary throttling and then enters the evaporator 2, or passes through the first throttling member 3 for primary throttling and enters the evaporator 2 through the control and adjustment member 5 to exchange heat with the air in the heat exchange channel, that is, absorb the heat in the air to condense the moisture in the air to achieve dehumidification. Then, the heat exchange medium in the evaporator 2 absorbs heat and becomes a gaseous low-temperature heat exchange medium, which is sent back to the compressor 6 and pressurized by the compressor 6, and this cycle is repeated to achieve heat exchange.

[0051] Refer to Figure 3 As shown, when drying the clothes in the clothes treatment drum 20, the low-temperature and wet air in the clothes treatment drum 20 enters the heat exchange channel under the action of the fan 40 and exchanges heat with the evaporator 2, so that the evaporator 2 absorbs heat from the air to achieve air dehumidification. The dehumidified dry and low-temperature air then exchanges heat with the condenser 1, and after heating the air to form high-temperature and dry air, it enters the clothes treatment drum 20 and exchanges heat with the clothes in the clothes treatment drum 20 to achieve heating or drying of the clothes.

[0052] Specifically, the condenser 1 may include a condensing pipe and a plurality of condensing fins. The plurality of condensing fins may be respectively arranged at intervals, and the condensing pipe sequentially passes through the plurality of condensing fins. The two ends of the condensing pipe are respectively communicated with the compressor 6 and the first throttling member 3.

[0053] Specifically, the evaporator 2 may include an evaporation pipe and a plurality of evaporation fins. The plurality of evaporation fins may be respectively arranged at intervals, and the evaporation pipe sequentially passes through the plurality of evaporation fins. One end of the evaporation pipe is communicated with the second throttling member 4 and the control and adjustment member 5, and the other end of the evaporation pipe is communicated with the compressor 6.

[0054] The laundry treatment device provided in this embodiment is provided with a heat pump heat exchange structure 10, and the heat pump heat exchange structure 10 includes a condenser 1, an evaporator 2, a first throttling member 3 and a second throttling member 4. The first throttling member 3 and the second throttling member 4 are connected in series in sequence between the heat exchange medium outlet 12 of the condenser and the heat exchange medium inlet 21 of the evaporator. A controllable and openable control and adjustment member 5 is connected in parallel at both ends of the second throttling member 4. With such a setting, when the control and adjustment member 5 is opened, the heat exchange medium flows out after passing through the first throttling member 3 and the control and adjustment member 5 in sequence, realizing primary throttling. When the control and adjustment member 5 is closed, the heat exchange medium flows out after passing through the first throttling member 3 and the second throttling member 4 in sequence, realizing secondary throttling. That is to say, if the heat exchange efficiency of the laundry treatment device is low, resulting in poor drying effect, such as when used in extremely cold regions with low temperatures or in winter, the control and adjustment member 5 is closed, and the heat exchange medium passes through the first throttling member 3 and the second throttling member 4 in sequence to complete secondary throttling and then enters the evaporator 2. Thereby, it can reduce the flow rate of the heat exchange medium entering the evaporator 2 per unit time to a certain extent. With a certain working power of the evaporator 2, it can improve the heating effect and dehumidifying effect of the evaporator on the air to a certain extent, which is conducive to improving the heat exchange efficiency of the laundry treatment device and realizing good drying of the laundry. When the heat exchange efficiency of the laundry treatment device is sufficient and the drying effect is good, the control and adjustment member 5 is opened, and the heat exchange medium flows out through the control and adjustment member 5 after passing through the first throttling member 3, completing primary throttling. In this way, while ensuring the heat exchange efficiency and drying efficiency, it can also avoid the situation of damaging the laundry due to too high heat exchange efficiency to a certain extent, and can achieve a certain energy-saving effect. That is to say, by controlling the opening and closing of the control and adjustment member 5, the throttling times of the heat exchange medium are controlled, so that two-stage pressure adjustment can be realized between the condenser 1 and the evaporator 2, thereby improving the heat exchange efficiency and realizing the rapid drying effect of the laundry and the like.

[0055] In some embodiments, referring to Figures 1 to 3 As shown, the first throttling member 3 is a capillary tube. The inlet end of the capillary tube is communicated with the heat exchange medium outlet of the condenser 1, and the outlet end of the capillary tube is communicated with the inlet end of the second throttling member 4 and the heat exchange medium inlet 51 of the control and adjustment member. In this way, the first throttling member 3 occupies a small space, has a relatively simple structure, low cost, and less noise during the throttling and pressure reduction process.

[0056] Of course, in some other embodiments, the first throttling member 3 can also be an electronic expansion valve. The inlet end of the electronic expansion valve is communicated with the heat exchange medium outlet 12 of the condenser, and the outlet end of the electronic expansion valve is communicated with the inlet end of the second throttling member 4 and the heat exchange medium inlet 51 of the control and adjustment member. In this way, the pressure of the heat exchange medium can be adjusted by adjusting the opening degree of the electronic expansion valve, and the adjustment is fast and accurate.

[0057] In some embodiments, referring to Figures 1 to 3As shown, the second throttling member 4 is a capillary tube. The inlet end of the capillary tube is communicated with the outlet end of the first throttling member 3 and the heat exchange medium inlet 51 of the control and adjustment member, and the outlet end of the capillary tube is communicated with the heat exchange medium inlet 21 of the evaporator and the heat exchange medium outlet 52 of the control and adjustment member. In this way, the second throttling member 4 occupies a small space, has a relatively simple structure, low cost, and less noise during the throttling and pressure reduction process.

[0058] Of course, in some other embodiments, the second throttling member 4 can also be an electronic expansion valve. The inlet end of the electronic expansion valve is communicated with the outlet end of the first throttling member 3 and the heat exchange medium inlet 51 of the control and adjustment member, and the outlet end of the electronic expansion valve is communicated with the heat exchange medium inlet of the evaporator 2 and the heat exchange medium outlet 52 of the control and adjustment member. In this way, by adjusting the opening degree of the electronic expansion valve, the pressure of the heat exchange medium can be adjusted, and the adjustment is fast and accurate.

[0059] In some embodiments, referring to Figures 1 to 3 As shown, when both the first throttling member 3 and the second throttling member 4 are capillary tubes, the length of the first throttling member 3 is greater than the length of the second throttling member 4. Wherein, the length of the first throttling member 3 is the length between the head end and the tail end of the capillary tube; similarly, the length of the second throttling member 4 is the length between the head end and the tail end of the capillary tube.

[0060] Among them, for capillary tubes with the same pipe diameter thickness, the longer the length, the better the throttling effect. Since the length of the first throttling member 3 is greater than the length of the second throttling member 4, that is to say, the first throttling member 3 is the main throttling member, and the second throttling member 4 is the auxiliary throttling member, so as to adjust the heat exchange efficiency and drying effect of the clothing treatment device through the cooperation of the first throttling member 3, the second throttling member 4 and the control and adjustment member 5 according to the changes of the environmental climate and the needs of users, improve the applicability of the clothing treatment device, and meet different usage requirements.

[0061] In some embodiments, referring to Figures 1 to 3 As shown, the capillary tube is a spiral structure. For capillary tubes of the same length, through the above settings, the occupied space of the capillary tube can be saved to a certain extent, thereby avoiding the interference between the capillary tube and the surrounding structures to a certain extent, and this is conducive to the development of the clothing treatment device towards the direction of small volume.

[0062] In some embodiments, referring to Figures 1 to 3 As shown, the outlet end of the second throttling member 4 and the heat exchange medium outlet 52 of the control and adjustment member are communicated through an intermediate pipeline 7. The outlet end of the intermediate pipeline 7 is communicated with the heat exchange medium inlet 21 of the evaporator.

[0063] With such a setting, through the intermediate pipeline 7, the outlet end of the second throttling member 4 can be connected to the heat exchange medium outlet 52 of the control and adjustment member first, and then the outlet end of the intermediate pipeline 7 can be directly connected to the heat exchange medium inlet 21 of the evaporator, which makes it simple to connect the second throttling member 4 and the control and adjustment member 5 to the heat exchange medium inlet 21 of the evaporator, and the assembly efficiency of the heat pump heat exchange structure 10 is high.

[0064] In some embodiments, the control and adjustment member 5 is a solenoid valve. With such a setting, the structure of the control and adjustment member 5 is simple, and it is simple and easy to operate when opening and closing the control.

[0065] Of course, the control and adjustment member 5 can also include an adjustment pipeline and an adjustment plate arranged in the adjustment pipeline, and the adjustment pipeline is connected in parallel at both ends of the second throttling member 4. For example, the adjustment plate can move relative to the adjustment pipeline to shield the inner cavity of the adjustment pipeline to close the adjustment pipeline, or move relative to the adjustment pipeline to expose the inner cavity of the adjustment pipeline to open the adjustment pipeline.

[0066] In some embodiments, referring to Figure 2 and Figure 3 as shown, the heat pump heat exchange structure 10 further includes a compressor 6, and the compressor 6 is connected between the heat exchange medium outlet 22 of the evaporator and the heat exchange medium inlet 11 of the condenser.

[0067] Wherein, a temperature detection member is arranged between the heat exchange medium outlet 61 of the compressor and the heat exchange medium inlet 11 of the condenser. The temperature detection member is electrically connected to the controller of the laundry treatment device. The temperature detection member is used to detect the exhaust temperature of the compressor 6, and the controller is used to control the control and adjustment member 5 to close when the detected exhaust temperature is less than the preset temperature threshold, and control the control and adjustment member 5 to open when the detected exhaust temperature is greater than or equal to the preset temperature threshold.

[0068] Since the compressor 6 is connected between the evaporator 2 and the condenser 1, when the control and adjustment member 5 is closed, the heat exchange medium in the condenser 1 enters the evaporator 2 after being throttled twice by the first throttling member 3 and the second throttling member 4. While reducing the flow rate of the heat exchange medium entering the evaporator 2 per unit time, this can also reduce the flow rate of the heat exchange medium entering the compressor 6 per unit time to a certain extent. When the working power of the compressor 6 is constant, the exhaust temperature of the compressor 6 can be increased to a certain extent, so as to increase the temperature of the heat exchange medium entering the condenser 1, further improve the heat exchange effect between the heat exchange medium and the air, and further improve the heat exchange efficiency of the laundry treatment device.

[0069] Therefore, the heat exchange efficiency of the laundry treatment device can be judged by detecting the exhaust temperature of the compressor 6, so as to adjust the opening and closing of the control and adjustment member 5.

[0070] Exemplarily, when the exhaust temperature is less than the preset temperature threshold, it indicates that the heat exchange efficiency of the laundry treatment device is poor and the drying effect of the laundry treatment device is not good. At this time, by controlling the control adjustment member 5 to close, the heat exchange medium in the condenser 1 sequentially passes through the first throttling member 3 and the second throttling member 4 for secondary throttling and then enters the evaporator 2, thereby increasing the exhaust temperature, and further improving the heat exchange efficiency of the laundry treatment device and the drying effect on the laundry.

[0071] When the exhaust temperature is greater than or equal to the preset temperature threshold, it indicates that the heat exchange efficiency of the laundry treatment device is sufficient and the drying effect of the laundry treatment device is good. By controlling the control adjustment member 5 to open, the heat exchange medium in the condenser 1 passes through the first throttling member 3 for one-time throttling and then enters the evaporator 2 through the control adjustment member 5, so as to avoid the situation of damaging the laundry due to too high exhaust temperature to a certain extent, and certain energy-saving effects can be achieved.

[0072] That is to say, through the above settings, it is convenient to flexibly adjust the opening and closing state of the control adjustment member 5 according to actual needs through the temperature detection member and the controller, improving the heat exchange efficiency of the laundry treatment device and the convenience during the adjustment and use of the drying effect. Moreover, while ensuring the heat exchange efficiency and drying effect of the laundry treatment device, it can also avoid the situation of damaging the laundry to a certain extent.

[0073] Among them, the above-mentioned controller can be, for example, the main controller of the laundry treatment device, or can also be a separate controller provided on the heat pump heat exchange structure 10. The temperature detection member can be, for example, a temperature sensor.

[0074] In some embodiments, the heat pump heat exchange structure 10 further includes a timing member, and the timing member is connected to the controller. The timing member is used to start timing when the temperature detected by the temperature detection member is greater than or equal to the preset temperature threshold, and control the control adjustment member 5 to open when the timing duration reaches the preset duration.

[0075] Such a setting can avoid the situation of detection errors caused by detection errors of the temperature detection member or instantaneous abnormalities of the exhaust temperature to a certain extent, ensuring the accuracy of the temperature detection member for detecting the exhaust temperature.

[0076] Continue to refer to Figures 1 to 4 As shown, this embodiment also provides a control method for a laundry treatment device. This method can be executed by part or all of the laundry treatment device provided in the above embodiment. Specifically, the method includes:

[0077] S100: Determine that the laundry treatment device is started, and control the above control adjustment member 5 to open.

[0078] That is, when starting up, the drying program is launched, the control adjustment member 5 is opened, and the compressor 6 is started. That is to say, in the initial state, the control adjustment member 5 is in the open state.

[0079] S200: Detect the exhaust temperature of the compressor 6 at the first moment.

[0080] Among them, the first moment can be, for example, the moment corresponding to when the compressor 6 has been started for twenty minutes. Specifically, a temperature detection component such as a temperature sensor can be provided at the heat exchange medium outlet 61 of the compressor, and the exhaust temperature of the compressor 6 is detected through the temperature sensor.

[0081] S201: Determine whether the exhaust temperature at the first moment is greater than or equal to the first preset temperature threshold T1 (T1 can be, for example, 50 °C).

[0082] When it is determined that the exhaust temperature at the first moment is less than the first preset temperature threshold, step S202 is executed: Control the control adjustment member 5 to close.

[0083] Specifically, control the control adjustment member 5 to close, so that the heat exchange medium undergoes secondary throttling through the first throttling member 3 and the second throttling member 4, thereby improving the heat exchange efficiency.

[0084] When it is determined that the exhaust temperature at the first moment is greater than or equal to the first preset temperature threshold, step S203 is executed: Control the timing member to start timing.

[0085] S204: Determine whether the duration for which the exhaust temperature at the first moment is greater than or equal to the first preset temperature threshold has reached the first preset duration t1.

[0086] Among them, t1 can be, for example, 60 seconds.

[0087] If it is determined that the duration for which the exhaust temperature at the first moment is greater than or equal to the first preset temperature threshold has reached the first preset duration t1, step S205 is executed: Control the control adjustment member 5 to open.

[0088] For example, control the control adjustment member 5 to open until the drying of the laundry treatment device ends. That is, step S300 is executed: Drying ends.

[0089] If the above-mentioned duration has not reached the first preset duration t1, step S202 is executed: Control the control adjustment member 5 to close.

[0090] Through the above timing setting, it is possible to avoid, to a certain extent, the situation where detection errors occur due to detection errors of the temperature sensor or instantaneous abnormalities of the exhaust temperature, ensuring the accuracy of detection, and thus improving the overall control accuracy.

[0091] In some embodiments, referring to Figure 4As shown, after step S202, the method further includes:

[0092] S400: Detect the exhaust temperature of the compressor 6 at the second moment. Here, the second moment is any moment after the first moment.

[0093] S401: Determine whether the exhaust temperature at the second moment is greater than or equal to the second preset temperature threshold T2.

[0094] Here, T2 can be, for example, 95°C.

[0095] Here, the second preset temperature threshold is higher than the first preset temperature threshold. Here, the second moment can be, for example, the moment corresponding to when the exhaust temperature at the first moment is less than the first preset temperature threshold and the control adjustment member 5 is controlled to close for twenty minutes.

[0096] When it is determined that the exhaust temperature at the second moment is greater than or equal to the second preset temperature threshold, then perform step S402: Control the timing member to start timing.

[0097] S403: Determine whether the duration for which the exhaust temperature at the second moment is greater than or equal to the second preset temperature threshold reaches the second preset duration t2.

[0098] Here, t2 can be equal to t1, for example, both being 60 seconds; or t2 can also be different from t1, and is specifically set before the factory of the laundry treatment device according to the actual situation.

[0099] If it is determined that the duration for which the exhaust temperature at the second moment is greater than or equal to the second preset temperature threshold reaches the second preset duration t2, then perform step S404: Control the control adjustment member 5 to open.

[0100] Specifically, the control adjustment member 5 can be opened until the drying of the laundry treatment device ends. That is, perform step S300.

[0101] If the above duration does not reach the second preset duration t2, then perform step S300.

[0102] In some embodiments, if the exhaust temperature at the second moment is less than the second preset temperature threshold, then step S300 can be performed.

[0103] With such a setting, when the exhaust gas temperature at the first moment is lower than the first preset temperature threshold, after the control and adjustment member 5 is controlled to close, the heat exchange medium in the condenser 1 is throttled twice successively through the first throttling member 3 and the second throttling member 4, so as to increase the exhaust gas temperature of the compressor 6 and the heat exchange efficiency of the laundry treatment device. To avoid the situation that the laundry and the like are damaged due to too high exhaust gas temperature, after the control and adjustment member 5 is closed for a preset time period, the exhaust gas temperature is detected again at the second moment, and the opening and closing of the control and adjustment member 5 can be adjusted according to the detection result of the exhaust gas temperature at the second moment, so as to ensure the heat exchange efficiency and drying effect of the laundry treatment device while providing a certain degree of anti-damage protection for the laundry and the like, and achieving a certain energy-saving effect.

[0104] Other technical features are the same as those in the above embodiment and can bring the same or similar technical effects, which will not be elaborated one by one here. For details, reference can be made to the description of the above embodiment.

[0105] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0106] The above is only the specific implementation manner of the embodiments of the present invention, enabling those skilled in the art to understand or implement the embodiments of the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present invention. Therefore, the embodiments of the present invention will not be limited to the embodiments described herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laundry treatment device, characterized in that, it comprises a cabinet, a laundry treatment drum arranged in the cabinet, and a heat pump heat exchange structure; a heat exchange channel is provided between the cabinet and the laundry treatment drum, the heat exchange channel is communicated with the inner cavity of the laundry treatment drum, and at least part of the heat pump heat exchange structure is arranged in the heat exchange channel; the heat pump heat exchange structure comprises a condenser, an evaporator, a first throttling member and a second throttling member; the first throttling member and the second throttling member are sequentially connected in series between the heat exchange medium outlet of the condenser and the heat exchange medium inlet of the evaporator; a controllable opening and closing control regulating member is connected in parallel at both ends of the second throttling member.

2. The laundry treatment device according to claim 1, characterized in that, the first throttling member is a capillary tube; and / or, the second throttling member is a capillary tube.

3. The laundry treatment device according to claim 1, characterized in that, both the first throttling member and the second throttling member are capillary tubes; the length of the first throttling member is greater than the length of the second throttling member, and / or, the capillary tube is a spiral structure.

4. The laundry treatment device according to claim 1, characterized in that, the first throttling member is an electronic expansion valve; and / or, the second throttling member is an electronic expansion valve.

5. The laundry treatment device according to claim 1, characterized in that, the outlet end of the second throttling member and the heat exchange medium outlet of the control regulating member are communicated through an intermediate pipeline; the outlet end of the intermediate pipeline is communicated with the heat exchange medium inlet of the evaporator.

6. The laundry treatment device according to claim 1, characterized in that, the control regulating member is a solenoid valve.

7. The laundry treatment device according to any one of claims 1 to 6, characterized in that, the heat pump heat exchange structure further comprises a compressor, and the compressor is connected between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the condenser; a temperature detection member is arranged between the heat exchange medium outlet of the compressor and the heat exchange medium inlet of the condenser, the temperature detection member is electrically connected to the controller of the laundry treatment device, the temperature detection member is used for detecting the exhaust temperature of the compressor, and the controller is used for controlling the control regulating member to close when the detected exhaust temperature is less than a preset temperature threshold, and controlling the control regulating member to open when the detected exhaust temperature is greater than or equal to the preset temperature threshold.

8. The laundry treatment device according to claim 7, characterized in that, the heat pump heat exchange structure further comprises a timing member, and the timing member is connected to the controller; the timing member is used for starting timing when the temperature detected by the temperature detection member is greater than or equal to the preset temperature threshold, and controlling the control regulating member to open when the timing duration reaches a preset duration.

9. A control method for a laundry treatment device according to any one of claims 1 to 8, characterized in that, the method comprises: determining that the laundry treatment device is started, and controlling the control regulating member to open; detecting the exhaust temperature of the compressor at a first moment; Determine that the exhaust gas temperature at the first moment is less than the first preset temperature threshold, and control the control and adjustment member to close.

10. The method according to claim 9, wherein, the method further includes: determine that the exhaust gas temperature at the first moment is greater than or equal to the first preset temperature threshold; determine that the duration for which the exhaust gas temperature at the first moment is greater than or equal to the first preset temperature threshold reaches the first preset duration, and control the control and adjustment member to open.

11. The method according to claim 9, wherein, after the step of determining that the exhaust gas temperature at the first moment is less than the first preset temperature threshold and controlling the control and adjustment member to close, the method further includes: detect the exhaust gas temperature of the compressor at a second moment, where the second moment is any moment after the first moment; determine that the exhaust gas temperature at the second moment is greater than or equal to the second preset temperature threshold; determine that the duration for which the exhaust gas temperature at the second moment is greater than or equal to the second preset temperature threshold reaches the second preset duration, and control the control and adjustment member to open; wherein, the second preset temperature threshold is higher than the first preset temperature threshold.

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