Heat pump heat exchange system of clothes treatment equipment, clothes treatment equipment and control method

Abstract

The embodiment of the invention relates to a heat pump heat exchange system of clothes treatment equipment, the clothes treatment equipment and a control method. The heat pump heat exchange system comprises a condenser, an evaporator, a compressor and a frequency conversion plate. The compressor is connected between a heat exchange medium inlet of the condenser and a heat exchange medium outlet of the evaporator; a cooling structure is arranged on a heat exchange medium flow path between a heat exchange medium outlet of the evaporator and a heat exchange medium inlet of the compressor, the cooling structure is in heat exchange contact with the frequency conversion plate, the cooling structure is provided with a cooling channel, and an inlet of the cooling channel communicates with the heat exchange medium outlet of the evaporator; and the outlet of the cooling channel is communicated with the heat exchange medium inlet of the compressor, so that cooling and waste heat recovery of the frequency conversion plate are realized, the working stability of the frequency conversion plate is improved, and the heat exchange efficiency is further improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of household appliances, and in particular, to a heat pump heat exchange system, a clothing treatment device, and a control method for a clothing treatment device. Background Art

[0002] Currently, heat pump heat exchange systems are usually provided in clothing treatment devices such as clothes dryers on the market. A heat exchange medium flows in the heat pump heat exchange system, and the heat exchange medium can exchange heat with air to achieve effects such as drying or dehumidifying the air, thereby drying the clothes in the clothes dryer. In the heat pump heat exchange system of the related art, a variable frequency compressor is used, and the operation of the variable frequency compressor is controlled by a variable frequency board. However, the variable frequency board in the related art has poor stability during operation, which affects the heat exchange efficiency. Summary of the Invention

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the embodiments of the present invention provide a heat pump heat exchange system, a clothing treatment device, and a control method for a clothing treatment device.

[0004] In a first aspect, the embodiments of the present invention provide a heat pump heat exchange system for a clothing treatment device, including a condenser, an evaporator, a compressor, and a variable frequency board;

[0005] The compressor is connected between the heat exchange medium inlet of the condenser and the heat exchange medium outlet of the evaporator;

[0006] A cooling structure is provided on the heat exchange medium flow path between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor. The cooling structure is in heat exchange contact with the variable frequency board. The cooling structure has a cooling channel, the inlet of the cooling channel is communicated with the heat exchange medium outlet of the evaporator, and the outlet of the cooling channel is communicated with the heat exchange medium inlet of the compressor.

[0007] The heat pump heat exchange system of the laundry treatment device provided by the embodiment of the present invention sets a cooling structure on the heat exchange medium flow path between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor, so that the cooling structure is in heat exchange contact with the frequency conversion board, and the cooling structure has a cooling channel. The inlet of the cooling channel is communicated with the heat exchange medium outlet of the evaporator, and the outlet of the cooling channel is communicated with the heat exchange medium inlet of the compressor. In this way, the low-temperature heat exchange medium flowing out from the heat exchange medium outlet of the evaporator enters the cooling channel. Since the cooling structure is in heat exchange contact with the frequency conversion board, the frequency conversion board is cooled by the low-temperature heat exchange medium flowing through the cooling channel, realizing effective heat dissipation of the frequency conversion board, avoiding excessive temperature rise of the frequency conversion board, ensuring the stability of the heat pump heat exchange system, and further ensuring the heat exchange efficiency. Moreover, since the frequency conversion board is in heat exchange contact with the cooling structure, while the cooling structure dissipates heat from the frequency conversion board, the heat of the frequency conversion board is transferred to the heat exchange medium, so that the temperature of the heat exchange medium flowing into the heat exchange medium inlet of the compressor through the cooling channel is increased, that is, the intake air temperature of the compressor is increased, thereby reducing the energy consumption of the compressor and further increasing the heat exchange efficiency. That is to say, the setting in this embodiment realizes the dual effects of effectively recovering the heat of the frequency conversion board and effectively cooling the frequency conversion board while dissipating heat from the frequency conversion board, and further improves the heat exchange efficiency.

[0008] In some embodiments, the cooling structure includes a cooling housing, and the cooling channel is formed on the cooling housing;

[0009] The frequency conversion board is attached to the outer wall surface of the cooling housing.

[0010] In some embodiments, the frequency conversion board is in direct contact with the outer wall surface of the cooling housing, and the outer contour size of the surface of the cooling housing in contact with the frequency conversion board is not less than the outer contour size of the frequency conversion board.

[0011] In some embodiments, the inlet of the cooling channel and the outlet of the cooling channel are located on opposite sides of the cooling housing.

[0012] In some embodiments, at least two cooling channels are provided in the cooling housing;

[0013] In the first direction along the board surface of the frequency conversion board, at least two cooling channels are arranged in sequence, and each cooling channel extends in the second direction along the board surface of the frequency conversion board, and the first direction and the second direction are perpendicular.

[0014] In some embodiments, a first heat exchange medium flow path and a second heat exchange medium flow path are connected between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor, and the first heat exchange medium flow path and the second heat exchange medium flow path are connected in parallel;

[0015] The cooling structure is arranged on the second heat exchange medium flow path, and the cooling channel is communicated with the second heat exchange medium flow path.

[0016] In some embodiments, a control and adjustment member is further arranged between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor, and the control and adjustment member is used for adjusting the opening and closing states of the first heat exchange medium flow path and the second heat exchange medium flow path.

[0017] In some embodiments, the control and adjustment member includes a first regulating valve, the first regulating valve is arranged on the first heat exchange medium flow path, and the first regulating valve is used for adjusting the opening and closing state of the first heat exchange medium flow path.

[0018] In some embodiments, the control and adjustment member further includes a second regulating valve;

[0019] The second regulating valve is arranged on the second heat exchange medium flow path, and the second regulating valve is used for adjusting the opening and closing state of the second heat exchange medium flow path.

[0020] In some embodiments, the first heat exchange medium flow path and the second heat exchange medium flow path are connected to the heat exchange medium outlet of the evaporator through a common flow section;

[0021] A three-way valve is arranged on the common flow section, the inlet of the three-way valve is communicated with the heat exchange medium outlet of the evaporator, the first outlet of the three-way valve is communicated with the first heat exchange medium flow path, and the second outlet of the three-way valve is communicated with the second heat exchange medium flow path.

[0022] In some embodiments, the heat pump heat exchange system further includes a temperature sensor;

[0023] The temperature sensor and the control and adjustment member are respectively electrically connected to the controller of the laundry treatment device, the temperature sensor is used for detecting the temperature of the frequency conversion board, and the controller is used for controlling the second heat exchange medium flow path to be conducted and controlling the first heat exchange medium flow path to be shut off when the detected temperature value is greater than or equal to a preset temperature threshold.

[0024] In some embodiments, a throttling member is arranged between the heat exchange medium outlet of the condenser and the heat exchange medium inlet of the evaporator.

[0025] In a second aspect, an embodiment of the present invention further provides a laundry treatment device, including a cabinet, a laundry treatment drum, and the heat pump heat exchange system of the laundry treatment device as described above;

[0026] The clothes treatment drum and the heat pump heat exchange system are both arranged in the box body. There is a heat exchange channel between the box body and the clothes treatment drum. The heat exchange channel is communicated with the inner cavity of the clothes treatment drum, and at least part of the heat pump heat exchange system is located in the heat exchange channel.

[0027] In the clothes treatment device provided by the embodiment of the present invention, by arranging a cooling structure on the heat exchange medium flow path between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor, enabling the cooling structure to be in heat exchange contact with the frequency conversion board, and making the cooling structure have a cooling channel, the inlet of the cooling channel is communicated with the heat exchange medium outlet of the evaporator, and the outlet of the cooling channel is communicated with the heat exchange medium inlet of the compressor. In this way, the low-temperature heat exchange medium flowing out from the heat exchange medium outlet of the evaporator enters the cooling channel. Since the cooling structure is in heat exchange contact with the frequency conversion board, the frequency conversion board is cooled by the low-temperature heat exchange medium flowing through the cooling channel, realizing effective heat dissipation of the frequency conversion board, avoiding excessive temperature rise of the frequency conversion board, ensuring the stability of the heat pump heat exchange system, and further ensuring the heat exchange efficiency. Moreover, since the frequency conversion board is in heat exchange contact with the cooling structure, while the cooling structure dissipates heat from the frequency conversion board, the heat of the frequency conversion board is transferred to the heat exchange medium, so that the temperature of the heat exchange medium flowing into the heat exchange medium inlet of the compressor through the cooling channel is increased, that is, the intake air temperature of the compressor is increased, thereby reducing the energy consumption of the compressor and further increasing the heat exchange efficiency. That is to say, such a setting in this embodiment realizes the dual effects of effectively recovering the heat of the frequency conversion board and effectively cooling the frequency conversion board while dissipating heat from the frequency conversion board, and further improves the heat exchange efficiency.

[0028] In a third aspect, the embodiment of the present invention further provides a control method for the clothes treatment device as described above. The method includes:

[0029] Detect the temperature of the frequency conversion board;

[0030] When it is determined that the temperature of the frequency conversion board is greater than or equal to the preset temperature threshold, control the second heat exchange medium flow path to be conducted and control the first heat exchange medium flow path to be shut off.

[0031] In some embodiments, the method further includes:

[0032] When it is determined that the temperature of the frequency conversion board is less than the preset temperature threshold, control the second heat exchange medium flow path to be shut off and control the first heat exchange medium flow path to be conducted. Description of the Drawings

[0033] The drawings here are incorporated into the specification and constitute a part of this 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.

[0034] 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 the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a schematic structural diagram of the heat pump heat exchange system of the laundry treatment device according to the embodiment of the present invention;

[0036] Figure 2 It is a schematic structural diagram of the connection between the frequency conversion board and the cooling structure of the heat pump heat exchange system according to the embodiment of the present invention;

[0037] Figure 3 It is a schematic partial structural diagram of the laundry treatment device according to the embodiment of the present invention;

[0038] Figure 4 It is a schematic flow diagram of the control method of the laundry treatment device according to the embodiment of the present invention.

[0039] Among them, 100, heat pump heat exchange system; 1, condenser; 2, evaporator; 3, compressor; 4, frequency conversion board; 5, cooling structure; 51, cooling housing; 511, cooling channel; 512, inlet of the cooling channel; 513, outlet of the cooling channel; 6, first heat exchange medium flow path; 7, second heat exchange medium flow path; 8, control and adjustment member; 81, first regulating valve; 82, second regulating valve; 9, common flow section; 91, three-way valve; 10, temperature sensor; 11, throttling member; 12, fan; 13, driving structure; 14, filter member; 15, heat exchange channel; 200, laundry treatment cylinder. Detailed Embodiments

[0040] In order to more clearly understand the above objects, features and advantages of the embodiments of the present invention, the following will further describe the solutions of the embodiments of the present invention. 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.

[0041] Many specific details are set forth in the following description 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.

[0042] Refer to Figures 1 to 4As shown in the figure, this embodiment provides a heat pump heat exchange system for a laundry treatment device. The laundry treatment device can be, for example, a dryer, a washing and drying integrated machine, or a clothing care machine, etc. Specifically, the laundry treatment device may include a cabinet, a laundry treatment drum 200 disposed inside the cabinet, and a heat pump heat exchange system 100. Among them, there is a heat exchange channel 15 between the cabinet and the laundry treatment drum, the heat exchange channel 15 communicates with the inner cavity of the laundry treatment drum 200, and at least part of the heat pump heat exchange system 100 is disposed in the heat exchange channel 15.

[0043] The laundry treatment device may further include a driving structure 13. The driving structure 13 is, for example, a driving motor. The driving structure 13 is electrically connected to the laundry treatment drum 200 and is used to drive the laundry treatment drum 200 to rotate. The laundry treatment drum 200 can be, for example, an inner drum, or the laundry treatment drum 200 includes an inner drum and an outer tub (not shown in the figure) sleeved outside the inner drum. There is a gap between the outer tub and the inner drum, and the driving structure 13 can drive the inner drum to rotate. The inner drum has a laundry feeding port. During laundry treatment, laundry and the like can be fed into the laundry treatment drum 200 through the laundry feeding port, and the laundry treatment drum 200 is driven to rotate by the driving structure 13 to achieve laundry treatment.

[0044] The heat pump heat exchange system 100 of the laundry treatment device provided in this embodiment includes a condenser 1, an evaporator 2, a compressor 3, and a frequency conversion board 4.

[0045] Among them, for example, a blower 12 can be disposed in the heat exchange channel 15, the driving structure 13 is electrically connected to the blower 12, and air flows between the heat exchange channel 15 and the laundry treatment drum 200 under the action of the blower 12. The air is heat-exchanged by the heat pump heat exchange system 100, and then the laundry in the laundry treatment drum 200 is dried. Exemplarily, as shown in the reference Figure 1 figure, for example, a filter element 14 can be disposed in the heat exchange channel 15. The filter element 14 can be disposed, for example, on the side of the laundry treatment drum 200 close to the laundry feeding port to filter the air entering the heat exchange channel 15 from the laundry treatment drum 200.

[0046] Specifically, the condenser 1 may include a condensing pipe and a plurality of condensing fins. The plurality of condensing fins can be respectively arranged at intervals, and the condensing pipe sequentially passes through the plurality of condensing fins. A heat exchange medium flows in the condensing pipe. The evaporator 2 may include an evaporating pipe and a plurality of evaporating fins. The plurality of evaporating fins can be respectively arranged at intervals, and the evaporating pipe sequentially passes through the plurality of evaporating fins. A heat exchange medium flows in the evaporating pipe.

[0047] Among them, the compressor 3 is connected between the heat exchange medium inlet of the condenser 1 and the heat exchange medium outlet of the evaporator 2.

[0048] Specifically, the variable frequency board 4 can be electrically connected to the compressor 3, for example. The variable frequency board 4 can be used to adjust the operating frequency of the compressor 3. For example, it can make the compressor 3 operate at a high frequency (such as an operating frequency of 1000 W) to shorten the drying time and improve the drying efficiency. As the compressor 3 continuously operates at a high frequency, the surface temperature of the variable frequency board 4 will gradually increase (such as rising above 100 °C). If the variable frequency board 4 cannot be effectively cooled, the working stability of the variable frequency board 4 will be affected.

[0049] Referring to Figures 1 to 2 As shown, a cooling structure 5 is provided on the heat exchange medium flow path between the heat exchange medium outlet of the evaporator 2 and the heat exchange medium inlet of the compressor 3. The cooling structure 5 is in heat exchange contact with the variable frequency board 4. The cooling structure 5 has a cooling channel 511. The inlet 512 of the cooling channel is communicated with the heat exchange medium outlet of the evaporator 2, and the outlet 513 of the cooling channel is communicated with the heat exchange medium inlet of the compressor 3.

[0050] Among them, the cooling structure 5 is in heat exchange contact with the variable frequency board 4, that is to say, the cooling structure 5 and the variable frequency board 4 can exchange and transfer heat.

[0051] Exemplarily, Figures 1 to 2 The solid arrows in Figures 1 to 2 represent the circulating flow path of the heat exchange medium, and the dashed arrows in

[0052] Exemplarily, the temperature of the heat exchange medium in the condenser 1 is generally between 60°C and 70°C. Among them, when the heat exchange medium in the condenser 1 exchanges heat with the air in the heat exchange channel 15, the temperature of the heat exchange medium entering the evaporator 2 from the condenser 1 is reduced to a certain extent, thereby reducing the temperature of the heat exchange medium flowing out of the evaporator 2 to a certain extent. That is to say, the heat exchange medium coming out of the evaporator 2 is in a low-temperature state. Since the cooling structure 5 is in heat exchange contact with the frequency conversion board 4, and the inlet 512 of the cooling channel is communicated with the heat exchange medium outlet of the evaporator 2, and the outlet 513 of the cooling channel is communicated with the heat exchange medium inlet of the compressor 3, when the heat exchange medium comes out of the evaporator 2 and enters the cooling channel 511, it can transfer heat to the frequency conversion board 4, so that the frequency conversion board 4 can be cooled to a certain extent through the heat exchange medium, realizing effective heat dissipation of the frequency conversion board 4. At the same time, the heat of the frequency conversion board 4 is transferred to the heat exchange medium. When the heat exchange medium in the cooling channel 511 cools the frequency conversion board 4 and then flows into the compressor 3 from the outlet 513 of the cooling channel, it can also increase the intake temperature of the heat exchange medium entering the compressor 3 to a certain extent, thereby improving the heat exchange efficiency.

[0053] The drying process of the clothes in the clothes treatment drum 200 by the heat pump heat exchange system 100 is as follows: The low-temperature and wet air in the clothes treatment drum 200 enters the heat exchange channel 15 under the action of the fan 12. For example, it can first pass through the evaporator 2 and exchange 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 to heat the air, and after forming high-temperature and dry hot air, it enters the clothes treatment drum 200, thereby realizing heating or drying of the clothes in the clothes treatment drum 200.

[0054] The heat pump heat exchange system of the laundry treatment device provided in this embodiment is provided with a cooling structure 5 on the heat exchange medium flow path between the heat exchange medium outlet of the evaporator 2 and the heat exchange medium inlet of the compressor 3. The cooling structure 5 is in heat exchange contact with the frequency conversion board 4, and the cooling structure 5 has a cooling channel 511. The inlet 512 of the cooling channel is communicated with the heat exchange medium outlet of the evaporator 2, and the outlet 513 of the cooling channel is communicated with the heat exchange medium inlet of the compressor 3. In this way, the low-temperature heat exchange medium flowing out from the heat exchange medium outlet of the evaporator 2 enters the cooling channel 511. Since the cooling structure 5 is in heat exchange contact with the frequency conversion board 4, the frequency conversion board 4 is cooled by the low-temperature heat exchange medium flowing through the cooling channel 511, effectively dissipating the heat of the frequency conversion board 4, avoiding the overheating of the temperature rise of the frequency conversion board 4, ensuring the stability of the heat pump heat exchange system 100, and further ensuring the heat exchange efficiency. Moreover, since the frequency conversion board 4 is in heat exchange contact with the cooling structure 5, while the cooling structure 5 dissipates the heat of the frequency conversion board 4, the heat of the frequency conversion board 4 is transferred to the heat exchange medium, so that the temperature of the heat exchange medium flowing into the heat exchange medium inlet of the compressor 3 through the cooling channel 511 is increased, that is, the intake air temperature of the compressor 3 is increased, thereby reducing the energy consumption of the compressor 3 and further increasing the heat exchange efficiency. That is to say, the setting in this embodiment effectively recovers the heat of the frequency conversion board 4 while dissipating the heat of the frequency conversion board 4, achieving the dual effects of waste heat recovery and effective cooling of the frequency conversion board 4, and further increasing the heat exchange efficiency.

[0055] In addition, compared with the method of air-cooling the frequency conversion board by using additional work-consuming devices such as fans and radiators, the above setting in this embodiment can, to a certain extent, avoid the increase in the overall energy consumption of the laundry treatment device, and can also, to a certain extent, avoid the noise generated by the fan or the like when cooling the frequency conversion board, providing a good user experience.

[0056] In some embodiments, as shown in Figures 1 to 2 a throttle member 11 is provided between the heat exchange medium outlet of the condenser 1 and the heat exchange medium inlet of the evaporator 2.

[0057] By providing the throttle member 11, the heat exchange medium at the heat exchange medium outlet of the condenser 1 can be throttled and depressurized, so that the heat exchange medium at the medium outlet of the condenser 1 becomes a low-temperature and low-pressure gas-liquid two-phase mixture and then enters the evaporator 2. Specifically, the heat exchange medium of the gas-liquid two-phase mixture in the evaporator 2 absorbs heat and becomes a gaseous low-temperature heat exchange medium and is sent back to the compressor 3.

[0058] That is to say, while the throttle member 11 throttles and reduces the pressure of the heat exchange medium at the heat exchange medium outlet of the condenser 1, it can further reduce the temperature of the heat exchange medium entering the evaporator 2, thereby further reducing the temperature of the heat exchange medium entering the cooling channel 511 from the evaporator 2, which is beneficial to improving the cooling effect on the inverter board 4.

[0059] Exemplarily, the throttle member 11 can be, for example, a capillary tube, an electronic expansion valve, etc.

[0060] In some embodiments, referring to Figures 1 to 3 As shown, the cooling structure 5 includes a cooling housing 51, and a cooling channel 511 is formed on the cooling housing 51. The inverter board 4 is attached to the outer wall surface of the cooling housing 51.

[0061] With this arrangement, the heat exchange medium in the cooling channel 511 first conducts heat transfer with the wall surface of the cooling housing 51. Since the inverter board 4 is attached to the outer wall surface of the cooling housing 51, effective cooling of the inverter board 4 can be achieved through heat transfer between the outer wall surface of the cooling housing 51 and the inverter board 4. The structure of the cooling structure 5 is simple and the cooling effect is good. Moreover, since the inverter board 4 is attached to the outer wall surface of the cooling housing 51, the contact area between the inverter board 4 and the cooling housing 51 can be increased to a certain extent, which is beneficial to improving the cooling effect.

[0062] Among them, the cooling channel 511 can be directly formed on the cooling housing 51, or a partition can be provided in the inner cavity of the cooling housing to divide the inner cavity of the cooling housing 51 into the cooling channel 511 through the partition.

[0063] Among them, the cooling housing 51 can be, for example, an aluminum housing or a copper housing with good thermal conductivity.

[0064] In some embodiments, referring to Figures 1 to 3 As shown, the inverter board 4 is in direct contact with the outer wall surface of the cooling housing 51. With this arrangement, the heat exchange medium in the cooling channel 511 first conducts heat transfer with the wall surface of the cooling housing 51. Since the inverter board 4 is in direct contact with the outer wall surface of the cooling housing 51, the heat transfer between the two is timely and direct, improving the heat transfer effect, and thus further improving the cooling effect on the inverter board 4.

[0065] Of course, in some other embodiments, the inverter board 4 can also be in heat exchange contact with the outer wall surface of the cooling housing 51 through a heat-conducting medium such as heat-conducting silicone.

[0066] Exemplarily, the inverter board 4 specifically includes a substrate and components arranged on the substrate. Specifically, the substrate is in direct contact with the cooling housing 51, and the components can be electrically connected to the compressor 3, for example.

[0067] In some embodiments, the outer contour dimensions of the side of the cooling housing 51 that contacts the variable frequency board 4 are not less than the outer contour dimensions of the variable frequency board 4. With this arrangement, the contact area between the cooling housing 51 and the variable frequency board 4 can be increased, thereby improving the cooling effect on the variable frequency board 4, making the operation of the entire heat pump heat exchange system 100 more stable, and ensuring the heat exchange efficiency.

[0068] In some embodiments, referring to Figures 1 to 2 as shown, the inlet 512 of the cooling channel and the outlet 513 of the cooling channel are located on opposite sides of the cooling housing 51.

[0069] With this arrangement, on the one hand, it can to a certain extent avoid the situation where the heat exchange medium entering from the inlet 512 of the cooling channel flows out from the outlet 513 of the cooling channel without heat exchange, ensuring the cooling effect and the stability of the operation of the variable frequency board 4; on the other hand, it is beneficial to ensure the smooth flow of the heat exchange medium in the cooling channel 511, further improving the cooling effect and the stability of the operation of the variable frequency board 4, and ensuring the heat exchange efficiency of the laundry treatment device.

[0070] In some embodiments, referring to Figure 2 and Figure 3 as shown, at least two cooling channels 511 are provided in the cooling housing 51. In the first direction along the plate surface of the variable frequency board 4, at least two cooling channels 511 are arranged in sequence, and each cooling channel 511 extends in the second direction along the plate surface of the variable frequency board 4, and the first direction and the second direction are perpendicular.

[0071] Among them, the first direction is specifically the Figure 3 X direction in Figure 2 and Figure 3 the Z direction in

[0072] This can dissipate heat from the variable frequency board 4 at multiple positions, further improving the heat dissipation effect on the variable frequency board 4 and ensuring the heat exchange efficiency.

[0073] Exemplarily, for example, an inlet can be opened on one side of the cooling housing 51, and an outlet can be opened on the opposite side of the cooling housing 51, and each cooling channel 511 is respectively communicated with the inlet and the outlet. For another example, at least two inlets can be opened on one side of the cooling housing 51, and at least two outlets corresponding to the inlets one by one can be opened on the opposite side of the cooling housing 51, and each cooling channel 511 is respectively correspondingly communicated with an inlet and the corresponding outlet.

[0074] In some embodiments, referring to Figures 1 to 2As shown, a first heat exchange medium flow path 6 and a second heat exchange medium flow path 7 are connected between the heat exchange medium outlet of the evaporator 2 and the heat exchange medium inlet of the compressor 3, and the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7 are connected in parallel. The cooling structure 5 is arranged on the second heat exchange medium flow path 7, and the cooling channel 511 communicates with the second heat exchange medium flow path 7.

[0075] That is to say, the heat exchange medium at the heat exchange medium outlet of the evaporator 2 can flow back to the compressor 3 through the first heat exchange medium flow path 6, or can flow back to the compressor 3 after the variable frequency board 4 is cooled by the second heat exchange medium flow path 7 and the cooling structure 5.

[0076] In some embodiments, referring to Figures 1 to 2 As shown, a control and adjustment member 8 is further arranged between the heat exchange medium outlet of the evaporator 2 and the heat exchange medium inlet of the compressor 3. The control and adjustment member 8 is used to adjust the opening and closing states of the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7. Herein, the opening and closing states include conduction and cutoff, and conduction can include full conduction or partial conduction.

[0077] With such a setting, it is convenient to adjust the opening and closing states of the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7 through the control and adjustment member 8 according to actual needs, and the use is flexible and convenient.

[0078] Exemplarily, for example, when it is necessary to cool down the variable frequency board 4, the control and adjustment member 8 can be used to control the first heat exchange medium flow path 6 to be cutoff and control the second heat exchange medium flow path 7 to be conducted, so that the low-temperature heat exchange medium coming out of the evaporator 2 flows back to the compressor 3 through the cooling structure 5, realizing effective heat dissipation for the variable frequency board 4 and ensuring the stability and heat exchange efficiency of the heat pump heat exchange system 100.

[0079] For another example, when the temperature of the variable frequency board 4 is normal and heat dissipation is not required, for example, the control and adjustment member 8 can be used to control the second heat exchange medium flow path 7 to be cutoff and control the first heat exchange medium flow path 6 to be conducted, so that the low-temperature heat exchange medium coming out of the evaporator 2 can directly flow back to the compressor 3 through the first heat exchange medium flow path 6. Thus, to a certain extent, it avoids the situation that when the temperature of the variable frequency board 4 is normal and lower than the temperature of the heat exchange medium coming out of the evaporator 2, the heat of the heat exchange medium is reversely transferred to the variable frequency board 4, resulting in a decrease in the intake air temperature of the compressor 3, and further ensures the heat exchange efficiency.

[0080] In some embodiments, referring to Figures 1 to 2 As shown, the control and adjustment member 8 includes a first regulating valve 81. The first regulating valve 81 is arranged on the first heat exchange medium flow path 6, and the first regulating valve 81 is used to adjust the opening and closing state of the first heat exchange medium flow path 6.

[0081] With such a setting, the first regulating valve 81 can select and regulate to a certain extent the flow path of the heat exchange medium flowing out of the evaporator 2 and returning to the compressor 3. For example, when the first regulating valve 81 is closed, the heat exchange medium flowing out of the evaporator 2 can flow through the second heat exchange medium flow path 7, be dissipated by the cooling structure 5 to the variable frequency board 4, and then return to the compressor 3, realizing the cooling of the variable frequency board 4. In addition, when the first regulating valve 81 is opened, the first regulating valve 81 can regulate the flow rate of the heat exchange medium on the first heat exchange medium flow path 6.

[0082] Exemplarily, the first regulating valve 81 can be, for example, a solenoid valve or a ball valve.

[0083] In some embodiments, referring to Figures 1 to 2 As shown, the control regulating member 8 further includes a second regulating valve 82. The second regulating valve 82 is arranged on the second heat exchange medium flow path 7, and the second regulating valve 82 is used to regulate the opening and closing state of the second heat exchange medium flow path 7.

[0084] With such a setting, through the cooperation of the second regulating valve 82 and the first regulating valve 81, to respectively regulate the opening and closing states of the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7, it is possible to further select and regulate the flow path of the heat exchange medium flowing out of the evaporator 2 and returning to the compressor 3. In addition, when the second regulating valve 82 is opened, the second regulating valve 82 can regulate the flow rate of the heat exchange medium on the second heat exchange medium flow path 7.

[0085] For example, when it is necessary to dissipate heat from the variable frequency board 4, the first heat exchange medium flow path 6 can be shut off by the first regulating valve 81, and the second heat exchange medium flow path 7 can be conducted by the second regulating valve 82, so that as much heat exchange medium flowing out of the medium outlet of the condenser 1 can return to the compressor 3 through the second heat exchange medium flow path 7 via the cooling structure 5. In this way, the heat dissipation effect on the variable frequency board 4 can be improved, and the working stability and heat exchange efficiency of the heat pump heat exchange system 100 can be improved.

[0086] For another example, when the temperature of the variable frequency board 4 is normal and heat dissipation is not required, for example, the first heat exchange medium flow path 6 can be conducted by the first regulating valve 81, and the second heat exchange medium flow path 7 can be shut off by the second regulating valve 82, so that as much heat exchange medium coming out of the evaporator 2 can directly return to the compressor 3 through the first heat exchange medium flow path 6, further ensuring the heat exchange efficiency.

[0087] Exemplarily, the second regulating valve 82 can be, for example, a solenoid valve or a ball valve.

[0088] In some embodiments, referring to Figures 1 to 2 As shown, the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7 are connected to the heat exchange medium outlet of the evaporator 2 through a common flow section 9.

[0089] By providing the common flow section 9, the connection between the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7 and the evaporator 2 is realized, and there is no need to additionally provide two heat exchange medium outlets corresponding to the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7 on the evaporator 2 respectively, that is, the original structure of the evaporator 2 does not need to be changed. Moreover, during assembly, the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7 can be integrally connected through the common flow section 9 first, and then the common flow section 9 and the evaporator 2 can be connected. The connection and assembly are simple and efficient.

[0090] In some embodiments, a three-way valve 91 is provided on the common flow section 9. The inlet of the three-way valve 91 is communicated with the heat exchange medium outlet of the evaporator 2. The first outlet of the three-way valve 91 is communicated with the first heat exchange medium flow path 6, and the second outlet of the three-way valve 91 is communicated with the second heat exchange medium flow path 7.

[0091] In this way, through the cooperation of the three-way valve 91 and the common flow section 9, the connection between the heat exchange medium outlet of the evaporator 2 and the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7 is realized, and the reflux of the heat exchange medium at the heat exchange medium outlet of the evaporator 2 in the compressor 3 is realized.

[0092] Exemplarily, assume that the inlet of the three-way valve 91 is N1, the first outlet of the three-way valve 91 is N2, and the second outlet is N3. Among them, the first outlet and the inlet of the three-way valve 91 can be shut off, the second outlet and the inlet of the three-way valve 91 can be conducted, the second regulating valve 82 can be opened, and the first regulating valve 81 can be closed to ensure the shut-off effect of the first heat exchange medium flow path 6, and the second heat exchange medium flow path 7 can be communicated with the evaporator 2 through the common flow section 9 to effectively cool the inverter board 4.

[0093] For another example, the first outlet and the inlet of the three-way valve 91 can be conducted, the second outlet and the inlet of the three-way valve 91 can be shut off, the first regulating valve 81 can be opened, and the second regulating valve 82 can be closed to ensure the shut-off effect of the second heat exchange medium flow path 7, and the first heat exchange medium flow path 6 can be communicated with the evaporator 2 through the common flow section 9, so that the heat exchange medium in the evaporator 2 flows back to the compressor 3 through the first heat exchange medium flow path 6, further ensuring the heat exchange efficiency.

[0094] During specific implementation, for example, the three-way valve 91 can also adjust the opening and closing states of the heat exchange medium outlet of the evaporator 2 and the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7, so as to cooperate with the setting of the control regulating member 8, further improving the accuracy of adjusting the opening and closing states of the first heat exchange medium flow path 6 and the second heat exchange medium flow path 7, ensuring the accuracy of the flow path when the heat exchange medium flows from the evaporator 2 to the compressor 3, and further ensuring the cooling effect and the heat exchange efficiency.

[0095] In some embodiments, referring to Figures 1 to 2 as shown, the heat pump heat exchange system 100 further includes a temperature sensor 10. The temperature sensor 10 and the control and adjustment member 8 are respectively electrically connected to the controller of the laundry treatment device. The temperature sensor 10 is used to detect the temperature of the frequency conversion board 4, and the controller is configured to control the second heat exchange medium flow path 7 to be turned on and control the first heat exchange medium flow path 6 to be turned off when the detected temperature value is greater than or equal to a preset temperature threshold. Exemplarily, the preset temperature threshold can be, for example, between 80°C and 95°C.

[0096] By setting like this, the temperature of the frequency conversion board 4 can be detected in a timely manner according to the temperature sensor 10, and when the detected temperature value is greater than or equal to the preset temperature threshold, that is, when the temperature of the frequency conversion board 4 is too high, the controller can control the second heat exchange medium flow path 7 to be turned on and turn off the first heat exchange medium flow path 6, so that as much as possible of the low-temperature heat exchange medium coming out of the evaporator 2 enters the compressor 3 through the second heat exchange medium flow path 7, so as to effectively cool the frequency conversion board 4 through the cooling structure 5, improving the timeliness of control and further improving the heat exchange efficiency.

[0097] Among them, the above-mentioned controller can be, for example, the controller of the heat pump heat exchange system 100, or the total controller of the laundry treatment device.

[0098] This embodiment also provides a laundry treatment device, including a cabinet, a laundry treatment drum 200, and the heat pump heat exchange system 100 of the laundry treatment device.

[0099] The heat pump heat exchange system 100 of the laundry treatment device in this embodiment has the same structure and implementation principle as the heat pump heat exchange system 100 of the laundry treatment device provided in the above embodiment, and can bring the same or similar technical effects, and reference can be made to the description of the above embodiment.

[0100] 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, and specific reference can be made to the description of the above embodiment.

[0101] This embodiment also provides a control method for a laundry treatment device. This method is executed by all or part of the laundry treatment device provided in the above embodiment. This method includes:

[0102] S100: Detect the temperature of the frequency conversion board 4.

[0103] S101: Determine whether the detected temperature of the frequency conversion board 4 is greater than or equal to a preset temperature threshold T1 (T1 can be, for example, 95°C).

[0104] If it is determined that the temperature of the frequency conversion board 4 is greater than or equal to the preset temperature threshold, then step S102 is executed: Control the second heat exchange medium flow path 7 to be turned on and control the first heat exchange medium flow path 6 to be turned off.

[0105] This enables as much as possible of the low-temperature heat exchange medium exiting from the evaporator 2 to flow through the second heat exchange medium flow path 7, so as to dissipate heat from the inverter board 4 through the cooling structure 5, improving the working stability and heat exchange efficiency of the heat pump heat exchange system 100.

[0106] In some embodiments, referring to Figure 4 as shown, the method further includes:

[0107] If it is determined that the temperature of the inverter board 4 is lower than a preset temperature threshold, then step S103 is executed: controlling the second heat exchange medium flow path 7 to be shut off and controlling the first heat exchange medium flow path 6 to be conducted.

[0108] In this way, when the temperature of the inverter board 4 is normal, the heat exchange medium exiting from the evaporator 2 can directly flow back to the compressor 3 through the first heat exchange medium flow path 6, which is beneficial to ensuring the intake air temperature of the compressor 3 and improving the heat exchange efficiency.

[0109] Other technical features are the same as those in the above embodiments and can bring the same or similar technical effects, which will not be elaborated one by one here. Specifically, reference can be made to the description of the above embodiments.

[0110] 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 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 further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0111] The above are only the specific implementation manners 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 conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat pump heat exchange system for a laundry treatment device, characterized in that, it includes a condenser, an evaporator, a compressor and a frequency conversion board; The compressor is connected between the heat exchange medium inlet of the condenser and the heat exchange medium outlet of the evaporator; A cooling structure is arranged on the heat exchange medium flow path between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor. The cooling structure is in heat exchange contact with the frequency conversion board. The cooling structure has a cooling channel. The inlet of the cooling channel is communicated with the heat exchange medium outlet of the evaporator, and the outlet of the cooling channel is communicated with the heat exchange medium inlet of the compressor.

2. The heat pump heat exchange system for a laundry treatment device according to claim 1, characterized in that, the cooling structure includes a cooling housing, and the cooling channel is formed on the cooling housing; The frequency conversion board is attached to the outer wall surface of the cooling housing.

3. The heat pump heat exchange system for a laundry treatment device according to claim 2, characterized in that, the frequency conversion board is in direct contact with the outer wall surface of the cooling housing, and the outer contour size of the surface of the cooling housing in contact with the frequency conversion board is not less than the outer contour size of the frequency conversion board.

4. The heat pump heat exchange system for a laundry treatment device according to claim 2, characterized in that, the inlet of the cooling channel and the outlet of the cooling channel are located on opposite sides of the cooling housing.

5. The heat pump heat exchange system for a laundry treatment device according to claim 2, characterized in that, at least two cooling channels are arranged in the cooling housing; In a first direction along the plate surface of the frequency conversion board, at least two cooling channels are arranged in sequence, and each cooling channel extends in a second direction along the plate surface of the frequency conversion board, and the first direction and the second direction are perpendicular.

6. The heat pump heat exchange system for a laundry treatment device according to any one of claims 1 to 5, characterized in that, a first heat exchange medium flow path and a second heat exchange medium flow path are connected between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor, and the first heat exchange medium flow path and the second heat exchange medium flow path are connected in parallel; The cooling structure is arranged on the second heat exchange medium flow path, and the cooling channel is communicated with the second heat exchange medium flow path.

7. The heat pump heat exchange system for a laundry treatment device according to claim 6, characterized in that, a control and adjustment member is further arranged between the heat exchange medium outlet of the evaporator and the heat exchange medium inlet of the compressor, and the control and adjustment member is used to adjust the opening and closing states of the first heat exchange medium flow path and the second heat exchange medium flow path.

8. The heat pump heat exchange system for a laundry treatment device according to claim 7, characterized in that, the control and adjustment member includes a first regulating valve, the first regulating valve is arranged on the first heat exchange medium flow path, and the first regulating valve is used to adjust the opening and closing state of the first heat exchange medium flow path.

9. The heat pump heat exchange system for a laundry treatment device according to claim 8, characterized in that, the control and adjustment member further includes a second regulating valve; The second regulating valve is arranged on the second heat exchange medium flow path, and the second regulating valve is used to regulate the opening and closing state of the second heat exchange medium flow path.

10. The heat pump heat exchange system of the laundry treating apparatus according to claim 7, wherein, the first heat exchange medium flow path and the second heat exchange medium flow path are connected to the heat exchange medium outlet of the evaporator through a common flow section; a three-way valve is arranged on the common flow section, an inlet of the three-way valve is communicated with the heat exchange medium outlet of the evaporator, a first outlet of the three-way valve is communicated with the first heat exchange medium flow path, and a second outlet of the three-way valve is communicated with the second heat exchange medium flow path.

11. The heat pump heat exchange system of the laundry treating apparatus according to claim 7, wherein, the heat pump heat exchange system further includes a temperature sensor; the temperature sensor and the control and regulating member are respectively electrically connected to the controller of the laundry treating apparatus, the temperature sensor is used to detect the temperature of the frequency conversion board, and the controller is used to control the second heat exchange medium flow path to be conducted and control the first heat exchange medium flow path to be shut off when the detected temperature value is greater than or equal to a preset temperature threshold.

12. The heat pump heat exchange system of the laundry treating apparatus according to any one of claims 1 to 5, wherein, a throttling member is arranged between the heat exchange medium outlet of the condenser and the heat exchange medium inlet of the evaporator.

13. A laundry treating apparatus, wherein, comprises a cabinet, a laundry treating drum and the heat pump heat exchange system of the laundry treating apparatus according to any one of claims 1 to 12; the laundry treating drum and the heat pump heat exchange system are both arranged in the cabinet, a heat exchange channel is formed between the cabinet and the laundry treating drum, the heat exchange channel is communicated with the inner cavity of the laundry treating drum, and at least part of the heat pump heat exchange system is located in the heat exchange channel.

14. A control method for the laundry treating apparatus according to claim 13, wherein, the method comprises: detecting the temperature of the frequency conversion board; determining that the temperature of the frequency conversion board is greater than or equal to a preset temperature threshold, controlling the second heat exchange medium flow path to be conducted, and controlling the first heat exchange medium flow path to be shut off.

15. The control method for the laundry treating apparatus according to claim 14, wherein, the method further comprises: determining that the temperature of the frequency conversion board is less than the preset temperature threshold, controlling the second heat exchange medium flow path to be shut off, and controlling the first heat exchange medium flow path to be conducted.

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