Heat pump drying system and clothes processor

Abstract

The invention provides a heat pump drying system which comprises an air outlet duct and an air return duct which are perpendicular to each other, and a condenser and an evaporator are arranged in the air outlet duct and the air return duct respectively. A fan is arranged at the end, close to the air return duct, of the air outlet duct and used for driving airflow to flow from the air return duct to the air outlet duct. The draught fan is arranged between the condenser and the evaporator, on one hand, wind resistance gathered on one side of the draught fan is dispersed to the two sides of the draught fan, air pressure between the draught fan and the evaporator and between the draught fan and the condenser is reduced, and impact on the air channel is reduced; and then the dry airflow is blown to the condenser through the fan, the temperature of the airflow is increased, the airflow flowing through the fan in the process is dry and low-temperature airflow, damage to the fan is reduced, and the fan is prevented from being overheated. The invention further provides a clothes processor provided with the heat pump drying system.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and in particular, relates to a heat pump drying system, and also to a clothes processing machine equipped with the heat pump drying system. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the quality of life, and thus higher and higher requirements for product quality, performance, humanization of use, intelligent operation and other aspects. As an excellent product, the heat pump washer-dryer has gradually entered people's lives. The heat pump washer-dryer is a device that combines washing and drying, which greatly increases the convenience of user use. The heat pump system of the heat pump washer-dryer uses a compressor to convert the refrigerant into cold and hot energy in the heat exchanger. The heat energy is used in conjunction with the fan to heat the air temperature in the barrel, so that the moisture in the clothes evaporates, and the water vapor passes through the air duct into the cold energy area for condensation, thereby realizing the drying function.

[0003] The Chinese invention patent with application number CN201610181823.8 discloses a clothes drying machine, wherein the clothes drying device includes: an upstream side wind path connected to the outlet of the drying chamber, a downstream side wind path connected to the inlet of the drying chamber, and an intermediate wind path connecting the upstream side wind path and the downstream side wind path. The heat pump unit has an intermediate wind path inside and constitutes a refrigeration cycle loop, which circulates the refrigerant through the compressor, condenser, throttle and evaporator. The condenser and evaporator are arranged in the intermediate wind path, and the air flowing in from the upstream side wind path is dehumidified by the evaporator, and heated by the condenser and flows to the downstream side wind path. The heat pump unit has an inlet between the compressor and the evaporator for air to flow from the upstream side wind path to the intermediate wind path.

[0004] However, in the above patent, the fan is arranged at the junction of the downstream air path and the horizontal air path, and the evaporator and condenser are arranged side by side in the horizontal air path. At this time, when the airflow blown by the fan blows to the condenser and evaporator, the wind resistance of the fan is concentrated on one side of the fan, which leads to an increase in the air pressure in the air duct. In addition, the hot and humid airflow flowing out of the drying room directly contacts the impeller of the fan, which will cause the impeller of the fan to be corroded by water vapor in the long run, reducing the service life of the fan.

[0005] Therefore, designing a heat pump drying system that can reduce wind resistance and at the same time reduce the impact of hot and humid airflow on the fan has become a technical problem that needs to be urgently solved by technical personnel in this field.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a heat pump drying system. By arranging the fan between the condenser and the evaporator, the wind resistance caused by the evaporator and the condenser is dispersed on both sides of the fan, the air pressure in the air duct is reduced, and the airflow blowing through the fan is made a dry airflow, thereby overcoming the problem in the prior art that when the fan is operating, the wind resistance is gathered on one side of the fan, resulting in an increase in the air pressure in the air duct and the fan being corroded by the humid and hot airflow.

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

[0009] A heat pump drying system comprises: an air outlet duct and an air return duct which are perpendicular to each other, wherein a condenser and an evaporator are respectively arranged in the air outlet duct and the air return duct;

[0010] A fan is arranged at one end of the air outlet duct close to the return air duct to drive the air flow from the return air duct to the air outlet duct.

[0011] Furthermore, the air outlet duct includes:

[0012] The impeller chamber is arranged at one end of the air outlet duct close to the return air duct and is used to accommodate the impeller of the fan;

[0013] The air outlet cavity is arranged at one end of the air outlet duct away from the return air duct and extends in a direction parallel to the return air duct.

[0014] Furthermore,

[0015] The impeller cavity is adapted to the axial length of the impeller, and the extension length of the air outlet cavity in the direction parallel to the return air duct is greater than the extension length of the impeller cavity in the direction parallel to the return air duct;

[0016] The motor of the fan is arranged outside the side wall of the air outlet duct away from the return air duct and is drivingly connected to the impeller.

[0017] Furthermore,

[0018] The motor is provided with a mounting ear plate on the periphery, and the air outlet duct is provided with a screw column corresponding to the mounting ear plate, and the motor is fixed to the air outlet duct by screws that pass through the mounting ear plate and are threadedly connected to the screw column;

[0019] Preferably, the air outlet duct includes an upper air outlet cover and a lower air outlet cover that are interlocked, and a plurality of screw columns and mounting ear plates are arranged circumferentially around the motor, and at least one screw column is arranged on each of the upper air outlet cover and the lower air outlet cover.

[0020] Furthermore,

[0021] A first vent corresponding to the air inlet end of the fan impeller is arranged on one side of the outlet duct close to the return duct; a second vent corresponding to the first vent is arranged on the return duct; the return duct is spliced ​​with the outlet duct, and the first vent is connected to the second vent.

[0022] Furthermore, it also includes:

[0023] A clamping protrusion is arranged around one of the first vent and the second vent;

[0024] The card slot is another arrangement surrounding the first vent and the second vent, corresponding to the card protrusion; the card protrusion is inserted into the card slot.

[0025] Furthermore, the air outlet duct also includes:

[0026] An air outlet is arranged at the top of the air outlet cavity and at one end away from the return air duct;

[0027] The air outlet channel surrounds the edge of the air outlet and extends obliquely upward in a direction away from the return air duct.

[0028] Furthermore, the return air duct also includes:

[0029] The return air outlet is arranged at the top of the return air duct and away from one end of the outlet air duct;

[0030] The return air channel surrounds the edge of the return air outlet and extends obliquely upward in a direction away from the air outlet channel.

[0031] Furthermore, the width of the return air duct gradually increases in the direction away from the outlet air duct.

[0032] One side of the return air passage is flush with the side wall of the return air duct;

[0033] The other side of the return air channel protrudes from the other side wall of the return air channel, and extends from the edge of the protruding portion close to the outlet air channel to the side wall in an arc transition.

[0034] The present invention also provides a clothes processing machine equipped with the heat pump drying system.

[0035] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0036] 1. The present invention arranges the fan between the condenser and the evaporator. On the one hand, the wind resistance gathered on one side of the fan is dispersed to both sides of the fan, thereby reducing the pressure between the fan and the evaporator and the condenser, and reducing the impact on the air duct. On the other hand, the airflow entering the return air duct first passes through the evaporator to convert the humid airflow into dry airflow, and then passes through the fan to blow the dry airflow to the condenser to increase the temperature of the airflow. In this process, the airflow flowing through the fan is dry airflow, thereby reducing the damage to the fan.

[0037] 2. The present invention provides an upwardly inclined air outlet channel and an air return channel at the return air outlet, so that the airflow enters and leaves the air duct more smoothly, reduces the impact of the airflow on the air duct, reduces noise and prolongs the service life.

[0038] 3. The present invention sets the width of the return air duct in the horizontal direction, and gradually increases the width from close to the air outlet duct to away from the air outlet duct, so as to increase the flow rate of the air flow in the same time and improve the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0040] Figure 1 It is an exploded view of the overall device in the present invention;

[0041] Figure 2 It is a schematic diagram of the overall device in the present invention;

[0042] Figure 3 Schematic diagram of the air outlet duct in the present invention;

[0043] Figure 4 It is a schematic diagram of the return air duct in the present invention;

[0044] Figure 5 It is a side view of the overall structure of the present invention.

[0045] Description of the main components in the figure:

[0046] 1. Return air duct; 11. Return air upper cover; 12. Return air lower cover; 13. Second vent; 14. Return air outlet; 141. Return air channel; 2. Outlet duct; 21. Outlet upper cover; 22. Outlet lower cover; 23. First vent; 24. Outlet; 241. Outlet channel; 25. Outlet cavity; 26. Impeller cavity; 27. Screw column; 3. Fan; 31. Motor; 311. Mounting ear plate; 41. Snap-on; 42. Slot; 51. Evaporator; 52. Condenser; 53. Compressor; 54. PTC heater; 61. Humidity sensor; 62. Temperature sensor. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0048] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In this embodiment, the heat pump system includes a return air duct 1, an outlet air duct 2, a condenser 52, an evaporator 51, a compressor 53 and a fan 3. One end of the outlet air duct 2 is connected to the return air duct 1, and the fan 3 is arranged between the two. The condenser 52 is arranged in the outlet air duct 2, and the evaporator 51 is arranged in the return air duct 1.

[0051] Specifically, the outlet duct 2 and the return air duct 1 extend horizontally in one direction, and an impeller chamber 26 is provided at one end of the outlet duct 2 close to the return air duct 1. The impeller chamber 26 is perpendicular to the extension direction of the duct and a first vent 23 is provided on the side wall. Correspondingly, a second vent 13 is provided in the return air duct 1. Opposite to the first vent 23, the outlet duct 2 and the return air duct 1 are connected via the first vent 23 and the second vent 13.

[0052] Specifically, the first vent 23 is matched with the outer periphery of the impeller, the impeller of the fan 3 is installed correspondingly at the position of the first vent 23 , and the motor 31 of the fan 3 is arranged outside the impeller cavity 26 on the side opposite to the first vent 23 .

[0053] Specifically, in the prior art, the fan 3 is usually arranged on one side of the condenser 52 and the evaporator 51. The fan 3 sucks the humid air in the drying room and blows the humid air out, passing through the evaporator 51 and the condenser 52 in sequence. This arrangement, firstly, when the fan 3 blows the air to the evaporator 51 and the condenser 52, wind resistance will be generated. At this time, the wind resistance is concentrated on one side of the fan 3, resulting in an increase in the air pressure between the fan 3 and the evaporator 51 and the condenser 52, and an increase in the impact on the air duct; secondly, the impeller of the fan 3 is eroded by the humid air for a long time, which affects the service life of the impeller.

[0054] Specifically, in this embodiment, the fan 3 is placed between the evaporator 51 and the condenser 52. On the one hand, the wind resistance gathered on one side of the fan 3 is dispersed to both sides of the fan 3, thereby reducing the air pressure between the fan 3 and the evaporator 51 and the condenser 52, and reducing the impact on the air duct. On the other hand, the airflow sucked from the drying chamber first passes through the evaporator 51 to convert the humid airflow into dry airflow, and then passes through the fan 3 to blow the dry airflow toward the condenser 52 to increase the temperature of the airflow. In this process, the airflow flowing through the fan 3 is all dry airflow, thereby reducing the damage to the fan 3.

[0055] Specifically, the evaporator 51 and the condenser 52 are composed of a plurality of connected U-shaped copper tubes arranged side by side. The extension direction of the copper tubes is the same as the extension direction of the air duct. The copper tubes are fixed on the fins. The evaporator 51 and the condenser 52 are respectively provided with an inlet and an outlet.

[0056] Specifically, the copper pipe is connected from the exhaust port of the compressor 53 to the inlet of the condenser 52 by a pipe, the outlet of the condenser 52 is connected to the throttling device by a pipe and then to the inlet of the evaporator 51 by a pipe, and the outlet of the evaporator 51 is finally connected to the suction port of the compressor 53 by a pipe.

[0057] Specifically, the extension length of the air duct is matched with the extension length of the evaporator 51 and the condenser 52, ensuring that the evaporator 51 and the condenser 52 can be completely installed inside, and the outlet duct 2 is provided with an outlet port 24, which is consistent with the extension direction of the outlet duct 2; the return air duct 1 is provided with a return air port 24, which is consistent with the extension direction of the return air duct 1, so that the contact area between the wind blowing from the drying room and the evaporator 51 is larger, thereby improving efficiency.

[0058] Specifically, the air outlet duct 2 also includes an air outlet cavity 25 communicated with the impeller cavity 26, which is arranged at one end away from the return air duct 1. The extension length of the impeller cavity 26 in a direction perpendicular to the extension direction of the air outlet duct 2 is smaller than the extension length of the air outlet cavity 25 in a direction perpendicular to the extension direction of the air outlet duct 2. This avoids the situation where the wind blown out by the impeller blows toward the condenser 52 along the extension direction of the duct, thereby reducing the heating efficiency. The setting method of this embodiment ensures that the wind blown out by the impeller does not blow directly onto the condenser 52, but first blows onto the inner wall of the air outlet cavity 25, thereby changing the wind direction and allowing the wind to pass through the condenser 52 in a direction perpendicular to the condenser 52, thereby improving the heating effect.

[0059] Embodiment 1

[0060] The present embodiment provides a structure of a heat pump drying system, which includes an outlet duct 2 and a return duct 1 which are perpendicular to each other, a condenser 52 and an evaporator 51 are respectively arranged in the outlet duct 2 and the return duct 1, and a fan 3 is arranged at one end of the outlet duct 2 close to the return duct 1 for driving the air flow from the return duct 1 to the outlet duct 2.

[0061] Specifically, the fan 3 is installed between the air outlet duct 2 and the return air duct 1, and the fan 3 is further arranged between the evaporator 51 and the condenser 52. In the existing technology, the fan 3 is usually arranged on one side of the evaporator 51 and the condenser 52. The wind blown by the fan 3 is first blown on the evaporator 51 to make it dry air. The dry air after passing through the evaporator 51 is then blown to the condenser 52 to heat the gas flowing through the condenser 52. At this time, the high-temperature dry air is blown out through the air outlet duct 2.

[0062] Specifically, when the fan 3 blows air toward the evaporator 51 and the condenser 52 or the fan 3 draws air from the evaporator 51 and the condenser 52, the evaporator 51 and the condenser 52 in the middle will produce wind resistance to the wind brought by the fan 3. When the wind blows from one side, it must first pass through the evaporator 51 and then pass through the condenser 52. During this period, the airflow blown out from the fan 3 must overcome the two layers of resistance of the evaporator 51 and the condenser 52, resulting in an increase in the air pressure between the fan 3 and the evaporator 51 and the condenser 52. In the present invention, the fan 3 is placed between the evaporator 51 and the condenser 52, so that during the operation of the fan 3, the return air end draws humid air from the evaporator 51, and then blows dry air to the condenser 52 through the air outlet end. In this way, the wind on one side of the fan 3 only needs to overcome the single layer of resistance of the evaporator 51 or the condenser 52, thereby reducing the wind resistance, thereby reducing the pressure in the air duct and extending the service life of the air duct.

[0063] Specifically, the outlet duct 2 also includes an impeller chamber 26 and an outlet chamber 25 arranged in sequence along an extension direction perpendicular to the return air duct 1. The impeller chamber 26 is arranged at one end close to the return air duct 1 to accommodate the impeller of the fan 3; the outlet chamber 25 is arranged at one end of the outlet duct 2 away from the return air duct 1 and extends in a direction parallel to the return air duct 1.

[0064] Specifically, the condenser 52 is installed in the air outlet chamber 25 and is suspended in the air. A plurality of openings are provided on the side of the air outlet chamber 25 away from the return air duct 1, which are used to lead the pipeline of the condenser 52 away from the end of the return air duct 1 out of the air outlet chamber 25 and connect it to the compressor 53. The pipeline between the condenser 52 and the compressor 53 suspends the condenser 52 in the air outlet chamber 25.

[0065] Specifically, the impeller cavity 26 is adapted to the axial length of the impeller, and the extension length of the air outlet cavity 25 in a direction parallel to the return air duct 1 is greater than the extension length of the impeller cavity 26 in a direction parallel to the return air duct 1; the motor 31 of the fan 3 is arranged outside the side wall of the air outlet duct 2 away from the return air duct 1, and is connected to the impeller transmission.

[0066] Specifically, an opening is left on the side wall of the impeller chamber 26 away from the return air duct 1 for connecting the impeller and the motor 31. The extension length of the impeller chamber 26 in the direction parallel to the return air duct 1 is adapted to the thickness of the impeller. On the one hand, no space is left to accommodate the motor 31, so that the impeller and the fan 3 can be separated, reducing the wind impact on the motor 31 and making the motor 31 run more stably. On the other hand, if the impeller chamber 26 is set too large, the gas flowing into the impeller chamber 26 will be dispersed, and the impeller cannot effectively blow the wind into the air outlet chamber 25. The method of the present invention can better limit the flow of wind. The size of the impeller chamber 26 can only accommodate the impeller of the fan 3. The wind will not be dispersed when it flows into the impeller chamber 26, so that every corner of the impeller chamber 26 can be affected by the power of the impeller, so that it is accelerated to flow into the air outlet chamber 25.

[0067] Specifically, a mounting ear plate 311 is provided on the circumference of the motor 31 , and a screw column 27 corresponding to the mounting ear plate 311 is provided on the air outlet duct 2 . The motor 31 is fixed to the air outlet duct 2 by screws that pass through the mounting ear plate 311 and are threadedly connected to the screw column 27 .

[0068] Preferably, the air outlet duct 2 includes an air outlet upper cover 21 and an air outlet lower cover 22 that are interlocked with each other, and a plurality of screw columns 27 and mounting ear plates 311 are arranged circumferentially around the motor 31. At least one screw column 27 is arranged on each of the air outlet upper cover 21 and the air outlet lower cover 22. The air outlet upper cover 21 and the air outlet lower cover 22 are limitedly fixed by fixing the screw column 27 to the fan 3.

[0069] Preferably, the air outlet upper cover 21 and the air outlet lower cover 22 which are buckled with each other can also be fixedly installed by setting a limiting protrusion.

[0070] Specifically, the limiting protrusions include: one is a protrusion extending from the outer peripheral wall of the air outlet upper cover 21 to the air outlet lower cover 22, and the thickness of the protrusion is half of the thickness of the air outlet upper cover 21; the other is a protrusion extending from the inner peripheral wall of the air outlet lower cover 22 to the air outlet upper cover 21, and the thickness of the protrusion is half of the thickness of the air outlet lower cover 22, or, one is a protrusion extending from the outer peripheral wall of the air outlet lower cover 22 to the air outlet upper cover 21, and the thickness of the protrusion is half of the thickness of the air outlet lower cover 22; the other is a protrusion extending from the inner peripheral wall of the air outlet upper cover 21 to the air outlet lower cover 22, and the thickness of the protrusion is half of the thickness of the air outlet upper cover 21. When the air outlet upper cover 21 and the air outlet lower cover 22 are buckled together, they are fixed by abutting against each other with their respective limiting protrusions.

[0071] Specifically, a first vent 23 corresponding to the air inlet end of the impeller of the fan 3 is provided on the side of the outlet duct 2 close to the return air duct 1; a second vent 13 corresponding to the first vent 23 is provided on the return air duct 1; the return air duct 1 is spliced ​​with the outlet duct 2, and the first vent 23 and the second vent 13 are connected.

[0072] Specifically, the first vent 23 includes a latching protrusion 41, which is a protrusion extending along the edge of the first vent 23 in the direction of the return air duct 1; the second vent 13 includes a latching groove 42, which is a groove arranged around the first vent 23, corresponding to the latching protrusion 41, and the latching protrusion 41 is inserted into the latching groove 42.

[0073] Specifically, the latching protrusion 41 can also be set on the second vent 13, and is a protrusion extending along the edge of the second vent 13 toward the air outlet duct 2. In contrast, the latching groove 42 is set on the first vent 23, and is set around the latching protrusion 41 of the second vent 13, corresponding to the latching protrusion 41, and the latching protrusion 41 is inserted into the latching groove 42.

[0074] Specifically, the return air duct 1 includes a return air upper cover 11 and a return air lower cover 12 that are interlocked with each other. The above-mentioned latching protrusion 41 or the latching groove 42 must ensure that at least a portion is provided on the return air upper cover 11 and the return air lower cover 12. The return air upper cover 11 and the return air lower cover 12 are fixed in a limited position by plugging the first vent 23 and the second vent 13 together.

[0075] Preferably, in order to make the return air upper cover 11 and the return air lower cover 12 more secure when they are buckled together, limiting protrusions can be provided on the mutually buckled air outlet upper cover 21 and the air outlet lower cover 22 to fix them.

[0076] Specifically, the limiting protrusions include: one is a protrusion extending from the outer peripheral wall of the return air upper cover 11 to the return air lower cover 12, and the thickness of the protrusion is half of the thickness of the return air upper cover 11; the other is a protrusion extending from the inner peripheral wall of the return air lower cover 12 to the return air upper cover 11, and the thickness of the protrusion is half of the thickness of the return air lower cover 12, or, one is a protrusion extending from the outer peripheral wall of the return air lower cover 12 to the return air upper cover 11, and the thickness of the protrusion is half of the thickness of the return air lower cover 12; the other is a protrusion extending from the inner peripheral wall of the return air upper cover 11 to the return air lower cover 12, and the thickness of the protrusion is half of the thickness of the return air upper cover 11. When the return air upper cover 11 and the return air lower cover 12 are buckled together, they are fixed by abutting against each other with their respective limiting protrusions.

[0077] Specifically, an air outlet 24 is provided at the top of the air outlet cavity 25 of the air outlet duct 2, at one end away from the return air duct 1, wherein one end of the air outlet 24 is provided on the top wall of the air outlet cavity 25, and the other end is provided on the side wall of the air outlet cavity 25 away from the return air duct 1, and the air outlet 24 also includes an air outlet channel 241, wherein the air outlet channel 241 surrounds the edge of the air outlet 24, extends upward at an angle in a direction away from the return air duct 1, and after extending for a distance, the end point of the inclined extension, the side close to the return air duct 1 is configured as a straight wall extending vertically upward, and the side away from the return air duct 1 is configured as a straight wall first extending in a horizontal direction in a direction away from the return air duct 1, and then extending upward in a vertical direction from the end point of the horizontally extending straight wall.

[0078] Specifically, at the top of the return air duct 1, at one end away from the outlet air duct 2, a return air outlet 24 is provided, one end of which is provided on the top wall of the return air duct 1, and the other end is provided as an extended end point extending from the side wall of the return air duct 1 away from the outlet air duct 2, along the horizontal direction, in the direction away from the outlet air duct 2; the return air outlet 24 also includes a return air channel 141, which surrounds the edge of the return air outlet 24, extends obliquely upward in the direction away from the outlet air duct 2, and then extends upward in the vertical direction from the inclined extended end point.

[0079] Specifically, the return air duct 141 and the outlet air duct 241 are connected to the drying chamber at one end away from the return air port 24 and the outlet air port 24. The return air duct 1 draws the humid air in the drying chamber into the return air duct 1 through the return air duct 141, and converts it into dry air through the evaporator 51. The fan 3 blows the dry air to the condenser 52 to heat the air, and finally enters the drying chamber through the outlet air duct 241 to complete a cycle. The outlet air duct 241 and the return air duct 141 are arranged to extend obliquely, which is conducive to allowing the airflow to leave or enter the air duct more smoothly, thereby reducing the damage to the air duct by the wind.

[0080] Preferably, the width of the return air channel 141 gradually increases along the horizontal direction from close to the air outlet duct 2 to away from the air outlet duct 2, and one side of the return air channel 141 is flush with the side wall of the return air duct 1; the other side of the return air channel 141 protrudes from the other side wall of the return air duct 1, and extends from the edge of the protruding part close to the air outlet duct 2 to the side wall with an arc transition.

[0081] Specifically, widening the width of the return air duct 141 is beneficial to increasing the air intake of the duct and improving the drying efficiency; at the same time, the side of the return air duct 1 away from the outlet air duct 2 is flush with the return air duct 141, which can reduce the overall occupied volume of the drying module; the edge extends to the side wall of the return air duct 1 close to the outlet air duct 2 with an arc transition, which is also to reduce the wind force during the suction process and allow the airflow to smoothly transition to the return air duct 1.

[0082] Specifically, a humidity sensor 61 is set at the return air duct 141 to detect the humidity of the air sucked in from the drying room; a temperature sensor 62 is set at the air outlet duct 241 to detect the temperature of the air blown out from the air duct. Multiple humidity sensors 61 can be set at different positions to improve measurement accuracy, and multiple temperature sensors 62 can be set at different positions to also improve measurement accuracy.

[0083] Specifically, a control logic is set. When the drying system is working, the temperature of the humidity sensor 61 is obtained and a humidity value that needs to be reached is preset. When the humidity sensor 61 obtains that the current humidity value reaches the preset value, the drying system stops operating.

[0084] Specifically, an auxiliary heating device is provided in the return air duct 1. The auxiliary heating device is a PTC heater 54, which is installed at the position of the second vent 13 and fixed in the return air lower cover 12 by screws.

[0085] Specifically, the wind after passing through the evaporator 51 is dry cold air, which needs to pass through the condenser 52 to be heated. During use, the external ambient temperature is usually too low. At this time, it is difficult to raise the air in the air duct to the required temperature by the condenser 52 alone. Therefore, an auxiliary heating device is provided at the second vent 13 to allow the dry air passing through the evaporator 51 to have a preheating link before entering the air outlet duct 2, so that the dry air has an initial temperature before passing through the condenser 52, thereby ensuring the drying efficiency of the drying system.

[0086] Specifically, a control logic is set. When the drying system is working, the temperature of the temperature sensor 62 is obtained and a temperature value that needs to be reached is preset. When the temperature sensor 62 obtains that the current temperature is less than the preset value, the PTC heater 54 is turned on to assist in heating the wind in the air duct until the temperature sensor 62 obtains that the current temperature is greater than the preset value, and then the PTC heating is turned off.

[0087] Specifically, in the present embodiment, the compressor 53 is placed in the angle space formed by the air outlet cavity 25 and the return air duct 1 to fully utilize the internal space of the drying system and reduce the waste of redundant space.

[0088] Embodiment 2

[0089] This embodiment provides a clothes processing machine using the above-mentioned heat pump drying system.

[0090] Specifically, the clothes processing machine includes a housing, an inner drum, an outer drum and a heat pump drying system. The heat pump drying system includes an air duct and a fan 3 for driving air circulation. The heat pump drying system is connected to the outer drum through the air duct.

[0091] Specifically, the air duct includes an outlet duct 2 and a return air duct 1. The outlet duct 241 of the outlet duct 2 is connected to the outer drum; the return air duct 141 of the return air duct 1 is connected to the outer drum. The circulating airflow of the heat pump system is blown into the outer drum from the outlet duct 2, and then blown into the return air duct 1 from the outer drum to form a cycle. The air blown into the outer drum from the outlet duct 2 is dry hot air, and the air blown into the return air duct 1 from the outer drum is humid air. The cycle is repeated many times to dry the clothes in the drum.

[0092] Specifically, the heat pump drying system is arranged at the bottom of the clothing processing machine and also includes two ventilation ducts. Two air holes are opened on the outer cylinder. One end of the ventilation duct is connected to one of the air holes, and the other end is connected to one of the air outlet channel 241 and the return air channel 141; one end of the other ventilation duct is connected to the other air hole, and the other end is connected to the other of the air outlet channel 241 and the return air channel 141.

[0093] Embodiment 3

[0094] This embodiment provides a clothing care machine using the above-mentioned heat pump drying system.

[0095] Specifically, the clothing care machine is a multifunctional product that integrates deodorization, ironing, sterilization, mite removal, and drying. In use, the operation mode of the clothing care machine is gentler than that of traditional dryers and ironing machines, and the clothes are hung vertically to reduce damage to the clothes. It is suitable for daily care of high-end clothes and is easy to operate.

[0096] Specifically, the clothing care machine includes a cabinet body and a cabinet door hingedly mounted on the cabinet body. A first accommodating cavity is formed inside the cabinet body. A hanging rack is provided on the side wall of the first accommodating cavity for hanging clothes. A second accommodating cavity is provided at the bottom of the cabinet body for accommodating a heat pump drying system. The first accommodating cavity and the second accommodating cavity are separated by a partition.

[0097] Specifically, the heat pump drying system is connected to the first accommodating chamber through an air duct, and the air duct includes an outlet duct 2 and a return air duct 1, the outlet channel 241 of the outlet duct 2 is connected to the first accommodating chamber; the return air channel 141 of the return air duct 1 is connected to the first accommodating chamber, and the circulating airflow of the heat pump system is blown into the first accommodating chamber from the outlet duct 2, and then blown into the return air duct 1 from the first accommodating chamber to form a cycle. The air blown into the first accommodating chamber from the outlet duct 2 is dry hot air, and the air blown into the return air duct 1 from the first accommodating chamber is humid air. The cycle is repeated many times to dry the clothes in the first accommodating chamber.

[0098] Specifically, two air holes are provided on the partition, and the air duct of the heat pump drying system is connected with the air holes.

[0099] Specifically, the air hole extends from the edge of the air hole along the direction of the first accommodating cavity toward the second accommodating cavity to form a sealing rib, and matching sealing grooves are provided on the air outlet duct and the return air duct of the heat pump drying system. The sealing rib is inserted into the sealing groove to realize the connection between the air duct of the heat pump drying system and the first accommodating cavity. In this embodiment, a sealing strip is applied to the sealing part to improve the sealing performance and further improve the drying efficiency.

[0100] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A heat pump drying system, characterized in that: It comprises an air outlet duct (2) and an air return duct (1) which are interconnected, and a condenser (52) and an evaporator (51) are respectively arranged in the air outlet duct (2) and the air return duct (1); A fan (3) is arranged at one end of the air outlet duct (2) close to the air return duct (1) for driving the air flow from the air return duct (1) to flow toward the air outlet duct (2).

2. A heat pump drying system according to claim 1, characterized in that: The air outlet duct (2) includes: An impeller chamber (26) is arranged at one end of the air outlet duct (2) close to the air return duct (1) and is used to accommodate an impeller of the fan (3); The air outlet cavity (25) is arranged at one end of the air outlet duct (2) away from the return air duct (1), and extends in a direction parallel to the return air duct (1).

3. A heat pump drying system according to claim 2, characterized in that: The impeller cavity (26) is adapted to the axial length of the impeller, and the extension length of the air outlet cavity (25) in a direction parallel to the return air duct (1) is greater than the extension length of the impeller cavity (26) in a direction parallel to the return air duct (1); The motor (31) of the fan (3) is arranged outside the side wall of the air outlet duct (2) away from the air return duct (1) and is drivingly connected to the impeller.

4. A heat pump drying system according to claim 3, characterized in that: A mounting ear plate (311) is provided on the peripheral side of the motor (31), and a screw column (27) corresponding to the mounting ear plate (311) is provided on the air outlet duct (2), and the motor (31) is fixed to the air outlet duct (2) by means of screws passing through the mounting ear plate (311) and being threadedly connected to the screw column (27); Preferably, the air outlet duct (2) comprises an air outlet upper cover (21) and an air outlet lower cover (22) that are interlocked, and a plurality of screw columns (27) and mounting ear plates (311) are arranged circumferentially around the motor (31), and at least one screw column (27) is arranged on each of the air outlet upper cover (21) and the air outlet lower cover (22).

5. A heat pump drying system according to any one of claims 1 to 4, characterized in that: A first vent (23) corresponding to the air inlet end of the impeller of the fan (3) is provided on one side of the air outlet duct (2) close to the return air duct (1); a second vent (13) corresponding to the first vent (23) is provided on the return air duct (1); the return air duct (1) is spliced ​​with the air outlet duct (2), and the first vent (23) and the second vent (13) are connected.

6. A heat pump drying system according to claim 5, characterized in that: Also includes: A clamping protrusion (41) is arranged around one of the first vent (23) and the second vent (13); The card slot (42) is another arrangement surrounding the first vent (23) and the second vent (13), and corresponds to the card protrusion (41); the card protrusion (41) is inserted into the card slot (42).

7. A heat pump drying system according to any one of claims 1 to 4, characterized in that: The air outlet duct (2) further comprises: An air outlet (24) is arranged at the top of the air outlet cavity (25) and at one end away from the return air duct (1); The air outlet channel (241) surrounds the edge of the air outlet (24) and extends upwardly in a direction away from the return air duct (1).

8. A heat pump drying system according to any one of claims 1 to 4, characterized in that: The return air duct (1) further comprises: The return air outlet (14) is arranged at the top of the return air duct (1) and away from one end of the outlet air duct (2); The return air channel (141) surrounds the edge of the return air port (14) and extends upwardly in a direction away from the air outlet duct (2).

9. A heat pump drying system according to claim 8, characterized in that: The width of the return air channel (141) gradually increases in a direction away from the air outlet channel (2). One side of the return air channel (141) is flush with the side wall of the return air duct (1); The other side of the return air channel (141) protrudes from the other side wall of the return air duct (1), and extends from the edge of the protruding portion close to the air outlet duct (2) to the side wall in an arc transition.

10. A clothes processing machine, characterized in that: A heat pump drying system as described in any one of claims 1 to 9 is installed.

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