WO2021213530A1 - Heat pump clothes dryer and control method for heat pump clothes dryer - Google Patents

Abstract

Disclosed are a heat pump clothes dryer and a control method for the heat pump clothes dryer. The heat pump clothes dryer comprises a drum (2), a heat pump system (4), a fan (3) and a ventilation assembly (5), wherein the heat pump system (4) comprises an air duct, a condenser (42) and an evaporator (43); the air duct comprising a first part (A2) in communication with a hot humid air outlet (21) of the drum (2) and an air inlet of the evaporator (43); and the ventilation assembly (5) is mounted on the first part (A2) of the air duct, and the ventilation assembly (5) is provided with an air intake hole (52) and an air output hole (55) which are capable of being opened and closed, the air intake hole (52) being used for introducing cold air outside the air duct into the first part (A2), and the air output hole (55) being used for discharging some of hot humid air inside the first part (A2). By means of the arrangement, the ventilation assembly (5) can guide cold air into the air duct and/or exhaust the hot humid air in the first part (A2) of the air duct, so as to reduce the temperature of the hot humid air exchanging heat with a refrigerant in a pipeline of the evaporator (43), thereby reducing the temperature of the exhaust air of a compressor (41), and preventing the compressor (41) from being repeatedly started and stopped due to overload.

Description

Heat pump dryer and control method of heat pump dryer

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office on May 20, 2020, the application number is 202010431219.2, and the application name is "Ventilation components and heat pump dryers", and it is filed in China on May 20, 2020. The patent office, the application number is 202010431212.0, the priority of the Chinese patent application named "heat pump dryer and heat pump dryer control method", and the application number is 202010431216.9 submitted to the China Patent Office on May 20, 2020 1. The priority of the Chinese patent application named "Heat Pump Dryer", the entire content of which is incorporated in this application by reference.

Technical field

The invention relates to a clothes dryer technology, in particular to a heat pump clothes dryer and a control method of the heat pump clothes dryer.

Background technique

The heat pump dryer is a commonly used household appliance for drying clothes.

The heat pump clothes dryer includes a drum, a fan, an air duct and a heat pump system; the drum is connected to the air duct, and the heat pump system includes a compressor, a condenser and an evaporator, at least the fan, the condenser and the evaporator are arranged in the air duct. When the heat pump dryer is working, the refrigerant undergoes a gas-liquid two-phase change in the heat pump system to absorb or release heat. Among them, the refrigerant condenses and releases heat at the condenser; the fan drives the air in the air duct to pass through the condenser, and the air absorbs The heat rises up and turns into dry and hot air, and the dry and hot air is sent into the drum, and takes away the moisture of the clothes to become hot and humid air, which makes the temperature of the clothes increase and the moisture decreases; the hot and humid air exits the drum and is sent to the evaporator for processing Cooling and dehumidification; the cooled and dehumidified air is then heated by the condenser, and the cycle is repeated to achieve drying of clothes.

However, when the temperature of the airflow discharged from the drum increases, for example, in the later stage of drying, the humidity of the clothes to be dried decreases, and the heat required for the clothes to be dried decreases, and the temperature of the hot and humid air discharged from the drum will increase accordingly. At this time, the compressor is in a high-load working state due to the excessively high exhaust temperature, which causes the compressor to start and stop frequently, which affects the drying efficiency.

Summary of the invention

One aspect of the present invention is to provide a heat pump clothes dryer, which includes a drum, a heat pump system, a fan, and a ventilation component. The drum has an inlet for dry and hot air and an outlet for hot and humid air. The heat pump system includes an air duct, a condenser, and an evaporator; The air duct includes a first part, a second part and a third part; the hot and humid air outlet and the air inlet of the evaporator are communicated through the first part, and the air outlet of the evaporator is connected to the condenser The air inlet is communicated through the second part, and the air outlet of the condenser is communicated with the dry hot air inlet through the third part; the fan is used to drive air to flow in the air duct and the drum; The air assembly is arranged in the first part of the air duct, and has an openable and closable air inlet and an air outlet; the air inlet is used to introduce cold air outside the air duct into the first part of the air duct; The air hole is used to exhaust part of the hot and humid air in the first part of the air duct.

The technical effect of one aspect of the present invention is: by providing a ventilating assembly, the ventilating assembly introduces cold air from the air inlet into the first part of the air duct, or discharges some hot and humid air in the first part of the air duct to the outside of the air duct , To reduce the temperature of the hot and humid air that exchanges heat with the refrigerant in the evaporator pipe, thereby reducing the discharge temperature of the compressor, which is beneficial to avoid the reduction of drying efficiency caused by frequent start and stop of the compressor due to high load .

Another aspect of the present invention is to provide a control method of a heat pump clothes dryer, which includes: starting the heat pump clothes dryer; according to the working temperature of the heat pump system, controlling the ventilation assembly to introduce cold air to the connecting evaporator and the drum The hot and humid air outlet is in a part of the air duct, or the ventilation assembly is controlled to discharge some hot and humid air in the air duct.

The technical effect of another aspect of the present invention is that the heat pump clothes dryer controls the ventilation component to introduce cold air into the first part and/or discharge part of the humid and hot air in the first part according to the working temperature of the heat pump system, so as to reduce entering the evaporator The temperature of the hot and humid air reduces the discharge temperature of the compressor, which helps to avoid the frequent start and stop of the compressor during high-load work.

Description of the drawings

Fig. 1 is a schematic diagram of the principle of a heat pump clothes dryer provided by the present invention;

Fig. 2 is a partial structural diagram 1 of the heat pump clothes dryer provided by the present invention;

Figure 3 is a schematic diagram of the structure of the heat pump system in Figure 2;

Fig. 4 is a second schematic diagram of a part of the structure of the heat pump clothes dryer provided by the present invention;

Fig. 5 is a schematic diagram of the structure of the rear side plate in Fig. 4;

FIG. 6 is a third schematic diagram of a part of the structure of the heat pump clothes dryer provided by the present invention;

Fig. 7 is a schematic diagram of the structure of the front support and ventilation assembly in Fig. 6;

FIG. 8 is a schematic diagram of the structure of part A in FIG. 7;

Fig. 9 is a partial enlarged view of the ventilation assembly in Fig. 1;

10 is a schematic diagram of a driving structure of a ventilation component in a heat pump clothes dryer provided by the present invention;

11 is a schematic diagram of another driving structure of a ventilation component in a heat pump clothes dryer provided by the present invention;

Figure 12 is a schematic diagram of another heat pump clothes dryer provided by the present invention;

Fig. 13 is the first flow diagram of the control method of the heat pump clothes dryer provided by the present invention;

14 is a schematic diagram of the second flow of the heat pump clothes dryer control method provided by the present invention;

FIG. 15 is the third flow diagram of the heat pump clothes dryer control method provided by the present invention;

FIG. 16 is a fourth flowchart of the method for controlling the heat pump clothes dryer provided by the present invention.

In the attached picture:

1: cabinet; 11: rear side panel; 110: air inlet; 2: drum; 21: hot and humid air outlet; 3: fan; 4: heat pump system; 41: compressor; 42: condenser; 43: evaporator 5: ventilating components; 51: body; 511: mounting plate; 512: first wall plate; 513: second wall plate; 514: cavity; 52: air inlet; 53: first cover plate; 531: The first shaft; 54: the driver; 55: the air outlet; 56: the second cover plate; 561: the second shaft; 57: the third shaft; 58: the first connecting rod; 59: the second connecting rod; 6: the first Drive motor; 7: front support; 71: first through hole; 72: second through hole; 8: heating element; 9: first filter; A1: heat pump circuit; A2: first part; A21: first section; A22: Second paragraph; A3: Second part; A4: Third part.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and the present invention is not limited to the following specific embodiments.

The heat pump dryer is a commonly used household appliance for drying clothes.

The heat pump clothes dryer includes a box body, a drum rotatably arranged in the box body, and a drying and condensing system installed between the box body and the drum and used for drying the clothes in the drum. Among them, the drying and condensing system includes a fan, a heat pump system and an air duct.

The heat pump system includes a compressor, a condenser, and an evaporator. Both the condenser and the evaporator include a gas flow channel for gas flow and a pipe for refrigerant flow. The gas flow channel and the pipe are arranged crosswise, so that heat exchange between the gas and the refrigerant can be realized. The air duct connects the drum, the fan, the condenser and the evaporator in series to form an air duct for the flow of hot air to dry the clothes. Among them, the fan is used to keep the hot air circulating between the air duct and the drum, the evaporator is used to cool the hot and humid air entering the air duct from the drum to remove the moisture in the hot and humid air, and the condenser is used to remove the moisture in the evaporator. The cold and dry air heated by water vapor and cooling.

Specifically, after the heat pump dryer is started, the fan drives the air in the box to circulate between the air duct and the drum. The hot and humid air entering the air duct from the air outlet of the drum enters the evaporator from the air inlet of the evaporator and exchanges heat with the refrigerant in the evaporator pipe. The heat of the hot and humid air is exchanged with the refrigerant in the evaporator pipe to make The refrigerant heats up and vaporizes, the water vapor in the hot and humid air condenses into condensed water due to the decrease in temperature and is separated from the air under the action of gravity. The gas port enters the condenser.

The refrigerant that has been heated and vaporized in the evaporator becomes a high-temperature and high-pressure gas under the action of the compressor, and then flows into the pipe of the condenser, and exchanges heat with the dry and cold air entering the condenser from the inlet of the condenser. After absorbing a large amount of heat from the high-temperature and high-pressure gas phase refrigerant, the dry and cold air becomes hot and dry air and is discharged from the air outlet of the condenser, and then flows into the drum from the air inlet of the drum to dry the clothes in the drum.

After the hot dry air vaporizes the water in the wet clothes, it turns into hot and humid air, and then enters the air duct from the air outlet of the drum again to start the next cycle. The refrigerant that loses heat in the condenser pipe flows back into the evaporator pipe to start the next cycle. In this way, the clothes can be dried finally.

However, in the later stage of drying, the humidity of the clothes has been greatly reduced, and the temperature drop of the dry and hot air entering the drum from the drum air inlet is significantly smaller, so that the temperature of the moist and hot air discharged from the drum air outlet will increase significantly. After the heat exchange with the refrigerant in the evaporator pipe, the exhaust temperature of the compressor will be too high, causing the compressor to stop or work intermittently, thereby affecting the drying efficiency.

In view of this, the present invention can consider installing a cooling component on the air duct between the hot and humid air outlet of the drum and the evaporator to reduce the temperature of the airflow to the evaporator and the condenser, so that the temperature is in line with the work of the evaporator and the condenser. In the temperature range, the compressor can be in a high-efficiency working state to avoid compressor shutdown.

Example one

Fig. 1 is a schematic diagram of the principle of a heat pump clothes dryer provided by the present invention, Fig. 2 is a partial structural diagram 1 of the heat pump clothes dryer provided by the present invention, Fig. 3 is a schematic structural diagram of the heat pump system in Fig. 2, and Fig. 4 is a schematic diagram of the heat pump system in Fig. 2 The second partial structural diagram of the heat pump clothes dryer provided by the present invention. FIG. 5 is a structural diagram of the rear side plate in FIG. 4. As shown in Figures 1 to 5, the heat pump clothes dryer includes a box body 1, a drum 2 rotatably arranged in the box body 1, and a drum 2 arranged between the box body 1 and the drum 2 and used for aligning the inside of the drum 2. The fan 3 and the heat pump system 4 are used to dry the clothes, and the cabinet 1 protects the drum 2, the fan 3 and the heat pump system 4. Among them, the bottom of the drum 2 is provided with a hot and dry air inlet (that is, the air inlet of the drum 2, which is located at the right end of the drum 2 in FIG. 1), and the opening of the drum 2 is provided with a hot and humid air outlet 21 (that is, the air outlet of the drum 2, Located at the left end of the drum 2 in Figure 1).

The heat pump system 4 includes an air duct, a condenser 42, an evaporator 43, and a compressor 41. Both the condenser 42 and the evaporator 43 include a gas flow channel for gas flow and a pipe for refrigerant flow, and the gas flow channel and the pipe are arranged in an intersecting manner, so that heat exchange between the gas and the refrigerant can be realized. The air duct includes a first part A2, a second part A3, a third part A4, and a fourth part that are connected in sequence. The hot and humid air outlet 21 and the air inlet of the evaporator 43 are connected through the first part A2, and the air outlet of the evaporator 43 is connected to the condenser The air inlet of the condenser 42 is connected through the second part A3, the air outlet of the condenser 42 and the hot dry air inlet are communicated through the third part A4, and the fourth part is formed in the drum 2.

In Figure 1, the fan 3 is arranged in the first part A2, the compressor 41 is arranged independently of the air duct, the compressor 41 is located between the air outlet of the evaporator 43 and the air inlet of the condenser 42, the evaporator 43, the compressor 41 It is connected to the condenser 42 in sequence and constitutes a heat pump circuit A1 for circulating the refrigerant.

Among them, the evaporator 43 is used to cool the hot and humid air in the first part A2 to remove the water vapor in the hot and humid air, the condenser 42 is used to heat the dry and cold air after the water vapor is removed and the temperature is reduced in the evaporator 43, and the compressor 41 is used to Compressed refrigerant is a power supply unit that circulates the refrigerant along the heat pump circuit A1.

The fan 3 is connected to the air duct, and the fan 3 is used to drive air to flow between the air duct and the drum 2. Wherein, the fan 3 may include a motor and a fan blade, and the motor is in a transmission connection with the fan blade, and the motor drives the fan blade to rotate to keep air flowing between the air duct and the drum 2.

The fourth part can be formed by the rear side plate 11 of the box body 1 and the air duct cover plate. The air duct cover plate is arranged on the side of the rear side plate 11 of the box body 1 facing away from the drum 2. An air inlet 110 is provided at a position corresponding to the dry and hot air inlet, and the air inlet 110 may be arranged along the circumference of the drum 2.

Specifically, when the heat pump dryer is working, the drum 2 rotates in the cabinet 1, and the laundry in the drum 2 flips up and down with the rotation of the drum 2; the fan 3 drives the air in the cabinet 1 in the air duct and the drum 2 flows within. The hot and humid air entering the first part A2 from the hot and humid air outlet 21 enters the evaporator 43 from the air inlet of the evaporator 43, and exchanges heat with the refrigerant in the pipe of the evaporator 43, and the refrigerant in the pipe of the evaporator 43 absorbs damp heat The heat of the air heats up and vaporizes. The water vapor in the hot and humid air condenses into condensed water due to the decrease in temperature and is separated from the air under the action of gravity. The hot and humid air loses a large amount of water vapor and becomes dry and cold air. The air outlet is discharged, and then the dry and cold air flows along the second part A3 to the air inlet of the condenser 42 and enters the condenser 42 from the air inlet of the condenser 42.

The refrigerant heated and vaporized in the evaporator 43 becomes a high-temperature and high-pressure gas under the action of the compressor 41, and then flows into the pipe of the condenser 42 and interacts with the dry and cold air entering the condenser 42 from the inlet of the condenser 42 For heat exchange, the dry and cold air absorbs a large amount of heat from the high-temperature and high-pressure gas phase refrigerant and becomes hot dry air. The hot dry air flows from the outlet of the condenser 42 into the third part A4 of the air duct, and then flows into the drum 2 through the hot dry air inlet. In order to dry the laundry in the drum 2.

The hot dry air will become hot and humid air after vaporizing the water in the wet clothes, and then enter the first part A2 from the hot and humid air outlet 21 again to start the next cycle. The refrigerant that loses heat in the tube of the condenser 42 flows back into the tube of the evaporator 43 to start the next cycle. In this way, the clothes can be dried finally.

It is understandable that a water receiving pan may also be provided under the evaporator 43. In this way, when the hot and humid air discharged from the hot and humid air outlet 21 of the drum 2 flows through the evaporator 43, the hot and humid air in the airflow can be cooled and condensed to precipitate condensed water to achieve the purpose of dehumidification. In order to prevent the precipitated condensate from falling into the box 1, it is beneficial to prevent the condensed water from flowing to the ground.

Wherein, the heat pump system 4 can be arranged at any position on the outer circumference of the drum 2. Considering the heavy weight of the heat pump system 4, the heat pump system 4 can be arranged at the bottom of the drum 2 to prevent the heat pump system 4 from falling due to weak support. The evaporator 43, the condenser 42, and the fan 3 can be arranged at intervals along the axis of the drum 2 to avoid the increase in the total length of the air duct caused by the staggered arrangement of the evaporator 43, the condenser 42, and the fan 3 along the radial direction of the drum 2. Thereby, the wind resistance can be reduced, and the heat loss of the hot air can be reduced.

Fig. 6 is a partial structural diagram 3 of the heat pump clothes dryer provided by the present invention, Fig. 7 is a structural diagram of the front support and ventilation assembly in Fig. 6, and Fig. 8 is a structural diagram of part A in Fig. 7. According to the structure of the heat pump dryer, the structure of each part of the air duct is different. Exemplarily, as shown in FIGS. 6 to 8, the first part A2 may be formed on the front support 7 of the heat pump dryer. The front support 7 also has a support part for supporting the hot and humid air outlet 21 of the drum 2. The first part A2 has a first through hole 71 communicating with the hot and humid wind outlet 21 of the drum 2 and a second through hole 72 communicating with the air inlet of the evaporator 43. Thereby, the hot and humid air discharged from the hot and humid air outlet 21 easily enters the first portion A2.

Wherein, the front support 7 may be provided with multiple support parts for supporting the hot and humid air outlet 21 of the drum 2, and the multiple support parts may be located on the same side or both sides of the first through hole 71. Considering the support stability of the hot and humid air outlet 21 of the drum 2, a plurality of supporting parts may be symmetrically arranged on both sides of the first through hole 71, which is located on the lower side of the hot and humid air outlet 21 of the drum 2, namely In other words, taking the vertical plane passing through the axis of the drum 2 as the first plane, the first through hole 71 may intersect the first plane or the first through hole 71 may be symmetrically arranged with respect to the first plane.

Fig. 9 is a partial enlarged view of the ventilation assembly in Fig. 1. As shown in Figure 1, Figure 7 Figure 8 and Figure 9, the heat pump dryer also includes a ventilating assembly 5, the ventilating assembly 5 is arranged on the first part A2 of the air duct, that is, the ventilating assembly 5 is arranged on the drum 2 The hot and humid air outlet 21 and the air inlet of the evaporator 43 are used to reduce the temperature of the hot and humid air in the first part A2. As a result, in the later stage of drying, the humidity of the clothes has been greatly reduced, and the heat exchange between the hot and dry air entering the drum 2 and the clothes to be dried is reduced, and the temperature of the hot and humid air discharged from the hot and humid air outlet 21 will increase accordingly. The ventilating assembly 5 is provided to reduce the temperature of the hot and humid air in the first part A2, thereby reducing the discharge temperature of the compressor 41, so as to prevent the compressor 41 from frequently starting and stopping due to high load.

Optionally, the ventilating assembly 5 may have an openable and closable air inlet 52, which is used to introduce cold air outside the air duct into the first part A2 of the air duct, so as to reduce the temperature of the hot and humid air in the first part A2. In this way, the air inlet 52 is used to introduce cold air into the first part A2, and the cold air enters the first part A2 and mixes with the hot and humid air to reduce the temperature of the hot and humid air that exchanges heat with the refrigerant in the pipe of the evaporator 43, thereby Reducing the discharge temperature of the compressor 41 avoids frequent start and stop of the compressor 41 due to high load, thereby helping to avoid a reduction in the drying efficiency of the heat pump clothes dryer.

Here, it should be noted that cold air should be understood in a broad sense, that is, cold air can be understood as the air outside the box 1, the air between the box 1 and the drum 2, or the low-temperature air discharged through heat exchange equipment, as long as its temperature is low. The temperature of the hot and humid air discharged from the hot and humid air outlet 21 of the drum 2 is sufficient. Exemplarily, the cold air in the first part A2 after being cooled and dehumidified by the evaporator 43 can be re-introduced into the first part A2 from the air inlet 52.

Illustratively, the air inlet 52 may be provided at an end of the first part A2 close to the air inlet of the evaporator 43, that is, the air inlet 52 is provided close to the air inlet of the evaporator 43. The fan 3 is arranged on the first part A2, wherein the first part is located on the side of the fan 3 where the wind pressure is negative, and the first part is located on the side of the fan 3 where the wind pressure is positive. In short, the first part A2 The side closer to the evaporator 43 increases the negative pressure. By arranging the air inlet 52 at the end close to the evaporator 43, it is convenient for cold air to enter the first part A2 under the negative pressure, with good fluidity and good heat dissipation effect.

Optionally, the ventilating assembly 5 may have an openable and closable air outlet 55, and the air outlet 55 discharges part of the hot and humid air in the first part A2 out of the first part A2 to reduce the temperature of the hot and humid air in the first part A2. In this way, the air outlet 55 is used to lead the hot and humid air in the first part A2 to the outside of the first part A2, reducing the amount of hot and humid air entering the air inlet of the evaporator 43, thereby reducing the discharge temperature of the compressor 41, thereby The compressor 41 is prevented from shutting down, and the drying efficiency is prevented from being affected.

Illustratively, the air outlet 55 may be arranged at an end of the first part A2 close to the hot and humid air outlet 21 of the drum 2, that is, the air outlet 55 is arranged away from the air inlet of the evaporator 43. Since the positive pressure on the side of the first part A2 closer to the drum 2 is greater, the air outlet 55 is arranged at one end close to the hot and humid air outlet 21 of the drum 2, so that part of the hot and humid air in the first part A2 can be discharged easily, and the heat dissipation effect is good.

In combination with the above description, it can be understood that the ventilation assembly 5 may have at least one of the air inlet 52 and the air outlet 55. In other words, the air venting assembly 5 is provided with an air inlet 52 and/or an air outlet 55.

For example, when the ventilating assembly 5 is provided with only the air inlet 52, the cold air enters the first part A2 through the air inlet 52, and the air volume in the first part A2 increases. Because the first part A2 of the heat pump clothes dryer is not tightly sealed, some The hot and humid air can leak out through the assembly gap of the first part A2, and part of the hot and humid air can also be discharged out through the air inlet 52. At this time, the air inlet 52 performs the functions of air intake and exhaust at the same time.

For another example, as shown in Figures 1 and 9, when the ventilation assembly 5 has both an openable and closable air inlet 52 and an air outlet 55, the air inlet 52 and the air outlet 55 may be spaced apart along the length of the air duct. Distance setting. Therefore, there is a certain distance between the air inlet 52 and the air outlet 55 to prevent a part of the hot and humid air discharged through the air outlet 55 from flowing back from the air inlet 52 to the first part A2 of the air duct.

When the ventilation assembly 5 has both the openable and closable air inlet 52 and the air outlet 55, the area of the air outlet 55 may be larger than the area of the air inlet 52. From the blower 3 through the third section A4, the fourth section and the first section A21, the hot air flows through a long route and has a lot of loss, and the air inlet 52 is close to the blower 3, that is, the intake flow of cold air will be greater than that of hot air. By setting the area of the air outlet 55 to be larger than the area of the air inlet 52, the air inlet volume of the cold air can be automatically balanced with the air outlet volume of the hot air, avoiding excessive introduction of cold air, and the heat pump system cannot heat the cold air in time, resulting in dryness. The clothing efficiency is reduced.

The formation positions of the air inlet hole 52 and the air outlet hole 55 will be described below with reference to the drawings.

As shown in FIGS. 7 to 9, the ventilation assembly 5 may include a body 51 installed on the first part A2 of the air duct, and the air inlet 52 is provided on the body 51. Therefore, by adjusting the installation position of the main body 51 on the first part A2 of the air duct, the cold air introduced from the air inlet 52 can be guided to a suitable position of the first part A2. Specifically, the body 51 includes a mounting plate 511 mounted on the first part A2, and the air inlet 52 is provided on the mounting plate 511.

Wherein, the setting position of the air outlet 55 includes but is not limited to the following possible implementations:

In an achievable manner, the air outlet 55 may also be provided on the body 51. Specifically, the air outlet 55 is also provided on the mounting plate 511. Therefore, by adjusting the installation position of the main body 51 on the first part A2 of the air duct, the hot and humid air discharged from the air outlet 55 can be drawn to a suitable position. For example, the main body 51 may be arranged close to the front side wall of the box body 1 so as to guide the hot and humid air from the front side wall of the box body 1.

Moreover, the air inlet 52 and the air outlet 55 can be integrally formed on the main body 51, that is, the air inlet 52 and the air outlet 55 can be formed on the main body 51 at the same time, which avoids the use of the heat pump dryer in the cabinet 1 An opening is added on the top to simplify the processing process.

In this example, the body 51 also includes a first wall plate 512 arranged on the mounting plate 511 toward the inner side of the first part A2, the first wall plate 512 is used to receive the hot and humid air discharged from the hot and humid air outlet 21 of the drum 2; The air outlet 52 and the air outlet 55 are arranged side by side on the mounting plate 511, and the air outlet 55 is located on the side of the air inlet 52 close to the first wall plate 512. At this time, the first wall plate 512 can be arranged along the radial direction of the first part, the air outlet 55 is arranged on the side of the first wall plate 512 facing the hot air, and the air inlet 52 is arranged on the air outlet 55 away from the first wall plate 512. On the side.

With this arrangement, the hot and humid air discharged from the hot and humid air outlet 21 of the drum 2 can impact the first wall plate 512, and part of the hot and humid air impacting the first wall plate 512 can flow along the first wall plate 512 to the air outlet 55 and be discharged. The first wall plate 512 guides part of the hot and humid air to the air outlet 55, which acts as a wind guide. The air inlet 52 located on the side of the air outlet 55 is subjected to the negative pressure of the fan 3 to introduce cold air into the first part A2.

In another achievable manner, the air outlet 55 may be formed on the front support 7 of the heat pump clothes dryer. Therefore, since the first part A2 is formed on the front support 7, the air outlet 55 formed on the front support 7 directly communicates with the hot and humid air outlet 21, so the position of the air outlet 55 can be unaffected by wind pressure, and the air outlet effect is good . In this embodiment, the position of the air outlet 55 on the front support 7 is not limited. For example, it may be located on the front support 7 on the rear side wall of the drum 2, the front support 7 on the front side wall facing away from the drum 2, or on the front side wall of the drum 2. The connecting side wall between the rear side wall and the front side wall.

Among them, the first part A2 may be integrally arranged. At this time, the first part A2 may be arc-shaped, and the arc-shaped first part A2 can conduct wind smoothly. Or, in some embodiments, as shown in Figures 7 and 8, the first section A2 can also be arranged in sections. The first section A2 specifically includes a first section A21 and a second section A22. The first section A21 is perpendicular to the drum The second section A22 extends in the direction parallel to the axis of the drum 2. The first section A21 and the second section A22 are both attached to the inner wall of the box body 1. As a result, the space in the heat pump dryer cabinet 1 can be effectively used. At this time, the air outlet 55 may be formed at the first section A21, the second section A22, or the intersection of the first section A21 and the second section A22.

When the air outlet 55 is provided on the first section A21 or the second section A22, the first wall plate 512 can be arranged in a radial direction perpendicular to the wall surface of the first section A2, as long as the first wall plate 512 does not block the first section A2. Can.

When the air outlet 55 is provided at the intersection of the first section A21 and the second section A22, the first wall plate 512 can be set at different positions according to the extension direction of the first section A21. Please refer to FIG. 8, the body 51 may Including a first wall plate 512, a second wall plate 513 and a third wall plate connecting the first wall plate 512 and the second wall plate 513, the first wall plate 512, the second wall plate 513 and the third wall plate are all mounted On the inner wall of the first part A2. The first wall plate 512, the second wall plate 513, and the third wall plate enclose a cavity 514 with an opening facing the hot and humid air outlet 21 of the drum 2. The air inlet is connected, and the other end of the cavity 514 along the axis of the drum 2 is provided with a mounting plate 511.

When the first section A21 extends in the vertical direction, hot wind impacts the third wall plate. At this time, the air inlet 52 may be arranged above the air outlet 55 or the air inlet 52 and the air outlet 55 may be arranged side by side in the horizontal direction.

Considering that there are supporting parts on both sides of the first through hole 71 to support the roller 2, the first through hole 71 is located in the middle of the front support 7, and the evaporator 43 may be located on one side of the first plane, and the first section A21 may be The heat pump dryer extends in an oblique shape at the side. At this time, hot air can hit the first wall 512, and the air inlet 52 and the air outlet 55 can be provided on the first wall 512 or the mounting plate 511.

It is worth noting that a mounting part is also connected to the front support 7. At this time, the body 51 can seal the mounting part. Wherein, the installation part may be a through-hole structure opened on the first part A2, as long as the first cover 53 can be firmly installed.

In the following, only the air inlet 52 and the air outlet 55 are provided on the body 51 as an example for description. After reading the following technical solutions, those skilled in the art can clearly understand that the air inlet 52 is provided on the body and the air outlet 55 is provided. The technical solution on the front support 7.

7-9, the ventilation assembly 5 may also include a first cover 53, a second cover 56 and a driver 54. The first cover 53 is provided at the air inlet 52, and the second cover 56 covers Located at the air outlet 55, the driver 54 is used to controllably drive the first cover 53 to open and close the air inlet 52, and to controllably drive the second cover 56 to move to open and close the air outlet 55. Therefore, the air inlet 52 and the air outlet 55 can be opened and closed in a controllable manner, so that the heat pump clothes dryer is suitable for various scenarios.

Exemplarily, in the early stage of drying, the driver 54 drives the first cover plate 53 to close the air inlet 52 and drives the second cover plate 56 to close the air outlet 55, so as to prevent the hot and humid air entering the air inlet of the evaporator 43 from cooling down, and then avoid The drying efficiency is reduced; in the later stage of drying, the driver 54 drives the first cover 53 to open the air inlet 52 and the second cover 56 to open the air outlet 55 to reduce the discharge temperature of the compressor 41, thereby avoiding the compressor 41 Frequent start and stop due to high load.

Wherein, the area of the first cover plate 53 is larger than the area of the air inlet hole 52, and the first cover plate 53 is attached to the wall surface around the air inlet hole 52 on the mounting plate 511 to optimize the sealing effect. Further, the surface of the first cover plate 53 facing the main body 51 may also be provided with a first sealing member for sealing the air inlet 52. As a result, the first sealing member can be pressed between the first cover 53 and the body 51, which improves the sealing performance of the air inlet 52, so that when the air inlet 52 is closed, the hot and humid air from the first cover 53 can be reduced. The gap with the mounting plate 511 may flow out.

The area of the second cover plate 56 may also be larger than the area of the air outlet 55, and the second cover plate 56 is attached to the wall surface around the air outlet 55 on the mounting plate 511 to optimize the sealing effect. Further, the surface of the second cover plate 56 facing the main body 51 is also provided with a second sealing member, and the second sealing member is used to seal the air outlet 55. Thereby, the second sealing member can be compressed between the second cover 56 and the main body 51, which improves the sealing performance of the air outlet 55, so that when the air outlet 55 is closed, the hot and humid air is reduced from the second cover 56 and the installation. The gap between the plates 511 may flow out.

It is worth noting that the first sealing element and the second sealing element may be rubber rings well known to those skilled in the art.

The first cover 53 may be installed on the outer wall surface of the first part A2, in order to prevent the first cover 53 from protruding from the cabinet 1 of the heat pump clothes dryer when the first cover 53 is opened. The movement form of the first cover plate 53 can be translation or rotation. According to the different movement forms of the first cover plate 53, the driver 54 can be a motor, an air cylinder, an oil cylinder, or the like.

For example, one side of the first cover plate 53 has a first rotating shaft 531 rotatably connected to the body 51, the driver 54 is a motor, and the motor shaft is drivingly connected to the first rotating shaft 531, and the motor drives the first cover plate 53 around the first rotating shaft. 531 rotates to open or close the air inlet 52.

Further, the driver 54 is used to drive the first cover 53 to rotate toward the inside of the first part A2. Since the gap between the outer wall surface of the first part A2 and the box 1 of the heat pump clothes dryer is small, this arrangement can avoid interference with the box 1 during the rotation of the first cover 53 and the air inlet 52 cannot be completed. Turn on.

In addition, the driver 54 can be arranged outside the first part A2, so that the driver 54 can avoid occupying a part of the first part A2 and causing the wind resistance to increase.

The second cover 56 may also be installed on the outer wall surface of the first part A2, in order to prevent the second cover 56 from protruding from the cabinet 1 of the heat pump clothes dryer when the second cover 56 is opened. The second cover 56 is similar to the first cover 53, and the movement form of the second cover 56 can also be translation or rotation.

For example, one side of the second cover 56 has a second rotating shaft 561 rotatably connected to the body 51, and the driver 54 is connected to the second rotating shaft 561 for driving the second cover 56 to rotate around the second rotating shaft 561 to open or Close the vent 55.

Of course, the driver 54 can also drive the second cover 56 to rotate toward the inside of the first part A2, so as to prevent the second cover 56 from interfering with the box body 1 during the rotation of the second cover 56 to prevent the air outlet 55 from being completely opened.

Here, it should be noted that two independent drivers 54 can be provided to drive the first cover plate 53 and the second cover plate 56 to move respectively. Therefore, by separately controlling the two independent drivers 54, the first cover 53 and the second cover 56 can be driven to move separately, so that the air inlet 52 and the air outlet 55 can be opened and closed in various situations. Exemplarily, the opening and closing situations of the air inlet 52 and the air outlet 55 are divided into the following types: the air inlet 52 is opened, the air outlet 55 is closed, the air inlet 52 and the air outlet 55 are opened at the same time, and the air inlet 52 is closed, The air outlet 55 is opened, and the air inlet 52 and the air outlet 55 are closed at the same time.

Alternatively, the first cover plate 53 and the second cover plate 56 can also be linked and controlled by the same driver 54. Therefore, when the number of the drivers 54 is one, the air inlet 52 and the air outlet 55 can be opened or closed at the same time, so that there is no need to control the two drivers 54 separately, and the operation is simple and convenient.

In order to enable the driver 54 to simultaneously drive the first cover plate 53 and the second cover plate 56 to move to open the air inlet 52 and the air outlet 55 at the same time, the ventilation assembly 5 may further include a connection between the first cover plate 53 and the second cover plate. In the linkage assembly of 56, the driver 54 is connected to any one of the linkage assembly, the first rotating shaft 531 and the second rotating shaft 561.

Fig. 10 is a schematic diagram of a driving structure of a ventilation component in a heat pump clothes dryer provided by the present invention. In an optional example of the present invention, as shown in FIG. 10, when the first rotating shaft 531 is located at one end of the first cover plate 53, and the second rotating shaft 561 is also located at one end of the second cover plate 56, the first cover plate 53 And the second cover 56 can rotate in the same direction.

In this example, the connecting rod assembly may include a connecting rod connecting the first rotating shaft 531 and the second rotating shaft 561. The connecting rod is connected to the end surfaces of the first rotating shaft 531 and the second rotating shaft 561, and the connecting rod is not connected to the first rotating shaft 531. Intersect the axis of the second rotating shaft 561. In other words, the first rotating shaft 531, the second rotating shaft 561, the connecting rod, and the first part A2 may constitute a parallelogram linkage mechanism. As a result, the first cover plate 53 and the second cover plate 56 can be rotated at the same time.

Fig. 11 is a schematic diagram of another driving structure of a ventilation assembly in a heat pump clothes dryer provided by the present invention. In another optional example of the present invention, as shown in FIG. 11, when the first rotating shaft 531 is located on the side of the air inlet 52 away from the air outlet 55, the second rotating shaft 561 is located on the side of the air outlet 55 away from the air inlet 52. When side, the first cover plate 53 and the second cover plate 56 can rotate in opposite directions.

In this example, the connecting rod assembly may include a third rotating shaft 57 connected to the body 51, and a first connecting rod 58 and a second connecting rod 59 connected to the end surface of the third rotating shaft 57, and the third rotating shaft 57 is located in the air inlet 52. The end of the first connecting rod 58 away from the third rotating shaft 57 is connected to the end surface of the first rotating shaft 531, and the end of the second connecting rod 59 away from the third rotating shaft 57 is connected to the end surface of the second rotating shaft 561; the driver 54 is in transmission connection with the third rotating shaft 57 to drive the third rotating shaft 57 to rotate, thereby driving the first connecting rod 58 and the second connecting rod 59 to move, thereby simultaneously pushing the first rotating shaft 531 and the second rotating shaft 561 to rotate to simultaneously open the The air hole 52 and the air outlet 55.

The third rotating shaft 57 is located between the first rotating shaft 531 and the second rotating shaft 561, and the third rotating shaft 57 may not be located in the same plane as the first rotating shaft 531 and the second rotating shaft 561. Preferably, the third rotating shaft 57 and the first rotating shaft 531 and the second rotating shaft 561 are located in the same plane. Therefore, it is easy to process and manufacture, and at the same time, the internal space of the heat pump clothes dryer is saved, so as to free up more installation space for other components.

The first connecting rod 58 connects the first rotating shaft 531 and the third rotating shaft 57, and the second connecting rod 59 connects the second rotating shaft 561 and the third rotating shaft 57. In order to realize the simultaneous rotation of the first cover plate 53 and the second cover plate 56, the first link 58, the first shaft 531, the third shaft 57 and the first part A2 constitute a first four-bar linkage mechanism. The second rotating shaft 561, the third rotating shaft 57 and the first part A2 constitute a second four-bar linkage mechanism, one of the first four-bar linkage mechanism and the second four-bar linkage mechanism is a regular parallelogram linkage structure, and the other is a reverse The parallelogram connecting rod structure realizes the rotation of the first cover plate 53 and the second cover plate 56 in opposite directions.

In the above embodiment, the material of the first rotating shaft 531, the second rotating shaft 561, and the third rotating shaft 57 may be POM, nylon, etc., which can be self-lubricating and wear-resistant.

On the basis of the above-mentioned embodiment, the body 51 may also be provided with a first filter 9 for filtering impurities in the hot and humid air. The first filter 9 is installed at the end of the body 51 facing the hot and humid air outlet 21 of the drum 2, from After the hot and humid air discharged from the hot and humid air outlet 21 is filtered by the first filter 9, a part of the filtered hot and humid air exits the first part A2 through the air outlet 55, and the other part of the filtered hot and humid air enters the evaporator 43. As a result, the hot and dry air vaporizes the water in the wet clothes in the drum 2 into hot and humid air. The hot and humid air lifts up some of the lint on the clothes and enters the first part A2. The first filter 9 is provided to avoid the hair. Foreign matter such as flocs enters the evaporator 43 and causes the gas flow channel and pipe of the evaporator 43 to be blocked. Among them, the first filter 9 may be a filter mesh, or a lint filter well known to those skilled in the art.

Preferably, the main body 51 is detachably mounted on the first part A2 of the air duct. Therefore, it is convenient to disassemble the main body 51 from the air duct, thereby facilitating maintenance and replacement of the main body 51. Further, the first filter 9 can be detached from the main body 51 to facilitate cleaning of the impurities filtered off on the first filter 9 to ensure the effective operation of the first filter 9. For example, the main body 51 can be connected to the air duct by means of snap connection or screw connection.

Further, the heat pump clothes dryer may further include a second filter, and the second filter may be arranged on the first through hole 71 or the first section A21 to prevent the sundries in the humid and hot air from passing through the first through hole 71 or the first section A21. Section A21 flows out. The second filter is similar to the first filter 9, and can also be a filter screen or a lint filter.

It should be pointed out that when the ventilation assembly is set at the intersection of the first section A21 and the second section A22, the driver can be set in the gap between the front support 7 and the bottom side plate of the box 1. The output shaft of the driver Passing through the side wall of the first part in the vertical direction and extending into the first part, the third rotating shaft 57 is detachably connected with the output shaft, which is convenient to take the main body 51 and the first filter 9 and the second filter installed on the main body 51 Device.

In order to automatically open and close the air inlet 52 and/or the air outlet 55, the heat pump dryer also includes a control device, which is connected to the ventilation assembly 5, and the control device is used to control the ventilation assembly 5 to open and close the air inlet 52 And/or open and close the vent 55. Among them, the control device may be an ICU (Inner Control Unit), a PLC (Programmable Logic Controller, programmable detection controller), or a single-chip microcomputer. Specifically, the control device is electrically connected to the driver 54, and the control device controls the driver 54 to realize the opening and closing of the air inlet 52 and/or the air outlet 55. When the first cover 53 and the second cover 56 are respectively controlled by two independent drivers 54, the control device respectively controls the two drivers 54 to drive the first cover 53 to move to open and close the air inlet 52, and to drive the first cover 53 The two cover plates 56 move to open and close the air outlet 55. When the first cover plate 53 and the second cover plate 56 are linked by the same driver 54, the control device controls the one driver 54 to drive the first cover plate 53 and the second cover plate 56 to move to open or close the air intake at the same time Hole 52 and vent 55.

Optionally, the heat pump clothes dryer may include a timer. The timer is used to time the rotation time of the drum 2, and the control device is used to control the ventilation assembly 5 when the rotation time of the drum 2 calculated by the timer reaches a set time. The cold air outside the air duct is introduced into the first part A2, and the ventilation assembly 5 is controlled to discharge some hot and humid air in the first part A2 out of the first part A2. Therefore, when the working time of the heat pump dryer reaches the set time and enters the late drying stage, the ventilation assembly 5 is controlled to reduce the temperature of the hot and humid air in the first part A2, so as to reduce the discharge temperature of the compressor 41. Among them, the setting time can be freely set by those skilled in the art according to actual needs and the specific model of the heat pump dryer. For example, after the drum 2 has rotated for 30 minutes, the heat pump dryer enters the late drying stage, that is, the humidity of the clothes has been greatly reduced, and the temperature of the hot and humid air discharged from the hot and humid air outlet 21 has increased significantly, the set time can be set to 30 minutes .

Alternatively, the heat pump clothes dryer may further include a temperature detection device electrically connected to the control device. The temperature detection device is used to detect the working temperature of the heat pump system 4, and the control device is used to detect when the temperature detected by the temperature detection device is greater than the preset temperature. At this time, the ventilation component 5 is controlled to introduce the cold air outside the air duct into the first part A2, and the ventilation component 5 is controlled to discharge some hot and humid air in the first part A2 out of the first part A2. Therefore, when the working temperature of the heat pump system 4 is higher than the preset temperature, the temperature of the moist and hot air in the first part A2 is reduced by controlling the ventilating assembly 5, thereby reducing the discharge temperature of the compressor 41 and avoiding the compressor 41 Frequent start and stop results in low drying efficiency. Moreover, compared with the previous implementation, this configuration can more accurately control the ventilating assembly 5 to reduce the temperature of the hot and humid air in the first part A2 when the high working temperature of the heat pump system 4 causes the compressor 41 to work at a high load. Among them, the temperature detection device may be a temperature sensor or an infrared thermocouple meter.

Among them, the temperature detection device can be used to detect the temperature of the air duct. Therefore, by knowing the temperature of the air in the air duct, the working condition of the compressor 41 can be roughly judged. When the temperature of the air in the air duct is high, the compressor 41 may be in a high load state, which is reduced by the ventilation assembly 5. The temperature of the air in the air duct prevents the compressor 41 from shutting down.

The temperature detection device may include a first temperature detection device, the first temperature detection device is used to detect the temperature of the air inlet of the evaporator 43, and the control device is used when the temperature detected by the first temperature detection device is greater than the first preset temperature , The control ventilation assembly 5 introduces the cold air outside the air duct into the first part A2, and discharges some hot and humid air in the first part A2 of the air duct out of the first part A2. As a result, the first temperature detection device can be used to automatically monitor the temperature of the hot and humid air entering the evaporator 43, so that an increase in the discharge temperature of the compressor 41 can be detected early, and countermeasures can be taken to prevent the compressor 41 from shutting down. Among them, this embodiment does not limit the first preset temperature, and can be freely set by those skilled in the art according to actual needs and the specific model of the heat pump dryer. Preferably, the first preset temperature is between 70°C and 80°C.

Similarly, the temperature detection device may also include a second temperature detection device, the second temperature detection device is used to detect the temperature of the air outlet of the condenser 42, and the control device is used to detect when the temperature detected by the second temperature detection device is greater than the second preset temperature. When the temperature is set, the ventilating assembly 5 is controlled to introduce the cold air outside the air duct into the first part A2, and to discharge some hot and humid air in the first part A2 of the air duct out of the first part A2. Therefore, the second temperature detection device can be used to automatically monitor the temperature of the hot dry air discharged from the air outlet of the condenser 42. When the temperature of the hot dry air is too high, the hot dry air exchanges heat with the wet clothes in the drum 2 To obtain hot and humid air at a higher temperature, it is possible to detect an increase in the exhaust temperature of the compressor 41 as early as possible, and take measures to prevent the compressor 41 from shutting down. Wherein, the second preset temperature is greater than the first preset temperature, and the second preset temperature can also be freely set by those skilled in the art according to actual needs and the specific model of the heat pump dryer. Preferably, the second preset temperature is between 90°C and 100°C.

The present invention is not limited to this. The temperature detection device may also include a third temperature detection device. The third temperature detection device is used to detect the temperature of the air outlet of the compressor 41, and the control device is used to detect when the temperature detected by the third temperature detection device is greater than At the third preset temperature, the ventilating assembly 5 is controlled to introduce the cold air outside the air duct into the first part A2, and to discharge some hot and humid air in the first part A2 of the air duct out of the first part A2. As a result, the third temperature detection device can be used to automatically monitor the discharge temperature of the compressor 41, so that an increase in the discharge temperature of the compressor 41 can be detected early, and countermeasures can be taken to prevent the compressor 41 from shutting down. Moreover, compared with the above two methods, the working condition of the compressor 41 can be obtained more accurately. Among them, this embodiment does not limit the third preset temperature, which can be freely set by those skilled in the art according to actual needs and the specific model of the heat pump dryer. Preferably, the third preset temperature is between 60°C and 70°C.

Of course, the above configuration is not restrictive, and the temperature detection device can also be arranged in other positions of the first part A2 to detect the temperature of the hot and humid air in the first part A2. For example, the temperature detecting device may be provided on the front support 7 on the rear side wall of the drum 2 and on the connecting side wall of the drum 2 for connecting the front side wall and the rear side wall.

In the above embodiment, the heat pump clothes dryer further includes a first driving motor 6 arranged in the cabinet 1, and the first driving motor 6 is connected to the drum 2 through a transmission device to drive the drum 2 to rotate. Among them, the transmission device can be a chain drive, a belt drive or a worm gear drive. For example, the transmission device includes a pulley and a belt. The pulley is in transmission connection with the first driving motor 6. The belt is wound around the pulley and the drum 2 so as to transmit the power of the first driving motor 6 to the drum 2. Of course, the first driving motor 6 can also be connected to the drum 2 through a clutch to drive the drum 2 to rotate.

In order to automatically control the heat pump dryer, the first drive motor 6 may be electrically connected to a control device, and the control device controls the rotation of the drum 2 through the first drive motor 6. Further, the control device can be used to control the periodic forward and reverse rotation of the drum 2 and stop the rotation for a preset time when the drum 2 is switched between the forward rotation and the reverse rotation. Therefore, in the process of drying the clothes, the drum 2 can be rotated forward and then reversed, so as to shake the clothes to be dried, so as to prevent the clothes to be dried from being knotted; moreover, stopping the rotation means that the drum 2 is switched from the forward rotation state. A buffer is provided for the reverse state to overcome the motion inertia. Among them, the drum 2 forward rotation time, stop rotation time and reverse rotation time can be freely set by the technicians according to actual needs. For example, the forward rotation time and the reverse rotation time are both between 1 and 3 minutes, and the stop time is 3s. Between ~ 5s.

The first driving motor 6 can be a three-phase asynchronous motor to drive the drum 2 for forward rotation and reverse rotation. Therefore, compared with setting two motors to drive the drum 2 to rotate forward and reverse, it is possible to avoid the motor occupying too much space in the box 1, so as to free up more installation space for other components of the heat pump system 4, so that the heat pump The system 4 can use a larger condenser 42 and an evaporator 43 to increase the heat exchange capacity of the heat pump system 4 and improve the drying effect.

Optionally, the first driving motor 6 may also be connected to the fan 3 to simultaneously drive the fan 3 to rotate. As a result, the number of motors used can be reduced, so that the space occupied by the motors in the cabinet 1 is reduced. Of course, the above configuration is not restrictive, and the heat pump clothes dryer can also be separately provided with a second driving motor connected to the fan 3 for driving the fan 3 separately. Therefore, the drum 2 and the fan 3 are driven by the first driving motor 6 and the second driving motor, respectively, so that the drum 2 and the fan 3 can be controlled separately to avoid the mutual influence of the operating states of the two.

Preferably, the control device is also electrically connected with the second driving motor, and the control device is used to control the normal operation of the fan 3 when the drum 2 stops rotating. As a result, when the drum 2 stops rotating, the operating state of the fan 3 will not be affected, avoiding a reduction in the drying speed due to the stop of the fan 3 due to the stop of the drum 2. In addition, the control device is also used to control the normal operation of the heat pump system 4 when the drum 2 stops rotating. As a result, the heat pump system 4 is prevented from switching between the running state and the stopped running state during the drying process, so as to avoid the heat pump system 4 from re-heating and heating when switching to the running state, resulting in a decrease in the drying efficiency.

Fig. 12 is a schematic diagram of another heat pump clothes dryer provided by the present invention. As shown in Figure 12, the heat pump dryer may further include a heating element 8, which is arranged between the air outlet of the condenser 42 and the dry hot air inlet of the drum 2, that is, in the second part A3 of the air duct . With this arrangement, the hot dry air discharged from the air outlet of the condenser 42 can be reheated when it flows through the heating element 8, so that the temperature of the hot dry air flowing into the drum 2 rises again, thereby accelerating the drying speed and improving the drying rate. Dry efficiency.

It is understandable that this configuration is especially suitable for the early stage of drying, the initial stage of the operation of the heat pump system 4, when the temperature rise rate of the dry hot air is low, the heating element 8 can speed up the temperature rise, so as to improve the drying efficiency and shorten the drying process. Dry time. Wherein, the heating element 8 can be an electric heating wire, a heat exchange tube with a flow of heat exchange medium, a PCT heating element, or other heating devices well known to those skilled in the art. In addition, the heating element 8 may be arranged at the bottom of the drum 2 or inside the drum 2, as long as the temperature of the dry hot air entering the drum 2 can be increased.

The heating element 8 may also be electrically connected to a control device, which is also used to periodically control the drum 2 to stop rotating, and when the drum 2 stops rotating, the control device also controls the heating element 8 to stop heating. Thus, it is avoided that the heating element 8 continues to heat and dry when the drum 2 is stopped, and the temperature of the dry hot air sent into the drum 2 is prevented from being too high, causing the laundry staying in the drum 2 to be burned.

Example two

Fig. 13 is a schematic flow chart 1 of the control method of the heat pump clothes dryer provided by the present invention. As shown in Figures 1 to 13, this embodiment also provides a method for controlling a heat pump clothes dryer, which includes the following steps:

Start the heat pump dryer; according to the working temperature of the heat pump system 4, control the ventilation assembly 5 to introduce cold air into a part of the air duct connecting the evaporator 43 and the hot and humid air outlet 21 of the drum 2; and/or control the ventilation assembly 5 Exhaust some hot and humid air from the first part A2 out of the first part A2.

The control method of the heat pump clothes dryer provided in this embodiment controls the ventilation assembly 5 to introduce cold air into the first part A2 and/or exhaust part of the hot and humid air in the first part A2 according to the working temperature of the heat pump system 4, so as to reduce the evaporation The temperature of the hot and humid air in the compressor 43 reduces the discharge temperature of the compressor 41, thereby avoiding the frequent start and stop of the compressor 41 during high-load operation.

Hereinafter, some possible control methods are briefly introduced in combination with the structure of the heat pump dryer, but these control methods should not be regarded as specific restrictions on the control method of the heat pump dryer.

Fig. 14 is a second flowchart of the method for controlling the heat pump clothes dryer provided by the present invention. Wherein, as shown in FIG. 14, according to the working temperature of the heat pump system 4, the air exchange assembly 5 is controlled to introduce cold air into a part of the air duct connecting the evaporator 43 and the hot and humid air outlet 21 of the drum 2; and/or, control the exchange The implementation manners for the air assembly 5 to discharge some hot and humid air in the first part A2 include but are not limited to the following:

In an achievable way, obtain the temperature of the air inlet of the evaporator 43; determine whether the temperature of the air inlet of the evaporator 43 is greater than the first preset temperature; if so, control the ventilation assembly 5 to introduce cold air into the In a part of the air duct connecting the evaporator 43 and the hot and humid air outlet 21 of the drum 2; and/or, the ventilation assembly 5 is controlled to discharge some hot and humid air in the first part A2 out of the first part A2.

In another achievable way, obtain the temperature of the air outlet of the condenser 42; determine whether the temperature of the air outlet of the condenser 42 is greater than the second preset temperature; The evaporator 43 and a part of the air duct of the hot and humid air outlet 21 of the drum 2; and/or, the ventilation assembly 5 is controlled to discharge some hot and humid air in the first part A2 out of the first part A2.

In another achievable way, obtain the temperature of the air outlet of the compressor 41; determine whether the temperature of the air outlet of the compressor 41 is greater than the third preset temperature; if so, control the ventilation assembly 5 to introduce cold air to the connection The evaporator 43 and a part of the air duct of the hot and humid air outlet 21 of the drum 2; and/or, the ventilation assembly 5 is controlled to discharge some hot and humid air in the first part A2 out of the first part A2.

Wherein, the control ventilation assembly 5 introduces cold air into a part of the air duct connecting the evaporator 43 and the hot and humid air outlet 21 of the drum 2 to specifically include: controlling the driver 54 to drive the first cover 53 to move to open the air inlet 52 The control of the ventilation assembly 5 to discharge some hot and humid air in the first part A2 out of the first part A2 specifically includes: controlling the driver 54 to drive the second cover 56 to move to open the air outlet 55.

When the first cover plate 53 and the second cover plate 56 are controlled by two independent drivers 54 respectively, the two drivers 54 are respectively controlled to open and close the air inlet 52 and/or the air outlet 55;

When the first cover plate 53 and the second cover plate 56 are linked by the same driver 54, the control driver 54 can open or close the air inlet 52 and the air outlet 55 at the same time.

Generally speaking, the process of starting the heat pump dryer can be divided into an energy-saving mode and a fast drying mode. When the user selects the energy-saving mode or the fast drying mode, the heat pump dryer automatically executes the corresponding control method.

Fig. 15 is the third flow diagram of the control method of the heat pump clothes dryer provided by the present invention. As shown in Figure 15, in the energy-saving mode, starting the heat pump dryer specifically includes:

The drum 2 is controlled to rotate, the fan 3 is operated, and the heat pump system 4 is operated, and the ventilation assembly 5 is controlled not to introduce cold air outside the air duct into the first part A2, and not to discharge part of the hot and humid air in the first part A2 out of the first part A2.

According to whether the drum 2 and the fan 3 are driven by the same motor, the control of the rotation of the drum 2 and the operation of the fan 3 can be executed in sequence or simultaneously. For example, when the drum 2 and the fan 3 are driven by the first driving motor 6 at the same time, the rotation of the drum 2 is controlled while the fan 3 is controlled to operate. When the drum 2 and the fan 3 are driven by the first driving motor 6 and the second driving motor, respectively, the drum 2 can be controlled to rotate first, and then the fan 3 can be controlled to operate. As a result, it is possible to prevent the drum 2 and the fan 3 from starting at the same time, so as to prevent the excessive inrush current from being generated at the moment of starting and causing the circuit to be damaged.

Wherein, controlling the rotation of the drum 2 specifically includes: controlling the periodic forward and reverse rotation of the drum 2 and stopping the rotation for a preset time when the drum 2 is switched between the forward rotation and the reverse rotation. It should be understood that when the drum 2 and the fan 3 are driven by the first drive motor 6 and the second drive motor, respectively, when the drum 2 stops rotating, the fan 3 can keep running through the control of the second drive motor by the control device. state. Therefore, it is avoided that the fan 3 stops running under the influence of the drum 2, which causes the drying speed to decrease.

Preferably, after controlling the rotation of the drum 2 and the operation of the fan 3, the heat pump system 4 is controlled to work. As a result, the heat pump system 4 is prevented from starting at the same time, so as to prevent the excessive inrush current from being generated at the moment of starting to cause the circuit to be damaged. It is understandable that when the drum 2 stops rotating, the heat pump system 4 can be controlled by the control device to keep working. As a result, it can be avoided that the heat pump system 4 needs to be preheated and heated again after being switched from the stop working state to the working state, which results in a long drying time.

In the control method of the heat pump dryer provided in this embodiment, in the early stage of drying, when the heat pump dryer is started, only the drum 2, the fan 3 and the heat pump system 4 operate to dry the clothes. The heat pump dryer has low energy consumption .

FIG. 16 is a fourth flowchart of the method for controlling the heat pump clothes dryer provided by the present invention. As shown in Figure 16, in the fast drying mode, starting the heat pump dryer specifically includes:

Control the rotation of the drum 2, the operation of the fan 3, and the operation of the heat pump system 4, and control the ventilation assembly 5 not to introduce the cold air outside the air duct into the first part A2, and not to discharge part of the hot and humid air in the first part A2 out of the first part A2; control heating The heating element 8 is heated, and the heating element 8 is arranged in a part of the air duct connecting the air outlet of the condenser 42 and the dry hot air inlet of the drum 2.

Through the above settings, due to the slow temperature rise in the early stage of drying, by controlling the heating element 8 for heating, the dry hot air in the air outlet of the condenser 42 and part of the air duct of the dry hot air inlet of the drum 2 is reheated to make dry heat The temperature of the air rises rapidly, which increases the drying speed and shortens the drying time, thereby realizing rapid drying. Here, it should be noted that the execution sequence and specific steps of controlling the rotation of the drum 2, the operation of the fan 3, and the operation of the heat pump system 4 are similar to the process of starting the heat pump dryer in the energy-saving mode, and will not be repeated here.

Among them, there is no restriction on the order of execution between the heat pump system 4 and the heating element 8, that is, the heating element 8 can be controlled to be heated first, and then the heat pump system 4 can be controlled to work; or the heat pump system 4 can be operated and the heating element 8 can be controlled at the same time. heating. A preferred example of this embodiment is to control the work of the heat pump system 4 first, and then control the heating element 8 to heat. Therefore, the heat pump system 4 and the heating element 8 are prevented from starting at the same time, so as to prevent the excessive inrush current from being generated at the moment of starting and causing the circuit to be damaged, and to prevent the heating element 8 from being dry-burned in the early stage of drying.

Further, the control method further includes: controlling the heating element 8 to stop heating when the drum 2 stops rotating. As a result, the heating element 8 is prevented from continuously heating and dry burning when the drum 2 stops rotating, and the temperature of the dry hot air sent into the drum 2 is prevented from being too high, causing the laundry staying in the drum 2 to be burned. Moreover, energy consumption should be avoided.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (22)

1. A heat pump clothes dryer is characterized in that it comprises:

   The drum has an inlet for dry and hot air and an outlet for hot and humid air;

   The heat pump system includes an air duct, a condenser and an evaporator; the air duct includes a first part, a second part and a third part; the hot and humid air outlet and the air inlet of the evaporator are communicated through the first part, The air outlet of the evaporator communicates with the air inlet of the condenser through the second part, and the air outlet of the condenser communicates with the dry hot air inlet through the third part;

   A fan for driving air to flow in the air duct and the drum;

   The ventilating assembly is arranged in the first part of the air duct and has an openable and closable air inlet and an air outlet; the air inlet is used to introduce cold air outside the air duct into the first part of the air duct; The air outlet is used to exhaust part of the hot and humid air in the first part of the air duct.
2. The heat pump clothes dryer according to claim 1, wherein the air inlet hole and the air outlet hole are arranged at a distance along the length direction of the air duct.
3. The heat pump clothes dryer according to claim 2, wherein the fan is arranged on the first part, and the air inlet is arranged on a side of the fan close to the air inlet of the evaporator, The air outlet is arranged on a side of the fan away from the air inlet of the evaporator.
4. The heat pump clothes dryer according to any one of claims 1-3, wherein the ventilating assembly includes a body, a first cover and a driver, and the body is arranged in the first part of the air duct. The air intake hole is provided on the body, the first cover plate is provided at the air intake hole, and the driver is used to controllably drive the first cover plate to move to open and close the air intake hole.
5. The heat pump clothes dryer according to claim 4, wherein the heat pump clothes dryer further comprises a front support, and the air outlet is provided on the front support.
6. The heat pump clothes dryer according to claim 4 or 5, wherein the area of the first cover plate is larger than the area of the air inlet hole, and the surface of the first cover plate facing the body is provided with The first sealing element is used to seal the air inlet hole.
7. The heat pump clothes dryer of claim 4, wherein the ventilating assembly includes a second cover, the air outlet is provided on the body, and the second cover is provided on the outlet. At the air hole, the driver is used to controllably drive the second cover plate to move to open and close the air outlet.
8. The heat pump clothes dryer according to claim 7, wherein the first cover and the second cover are respectively controlled by two independent drivers, or the first cover and the The second cover is controlled by the same driver in linkage.
9. The heat pump clothes dryer according to claim 8, wherein:

   One side of the first cover plate is provided with a first rotating shaft rotatably connected to the body, and the first rotating shaft is located on a side of the air inlet hole away from the air outlet hole;

   One side of the second cover plate has a second rotating shaft rotatably connected to the main body, and the second rotating shaft is located on a side of the air outlet away from the air inlet;

   A connecting rod assembly is provided between the first rotating shaft and the second rotating shaft, and the input end of the connecting rod assembly is connected with the output end of the driver.
10. The heat pump clothes dryer of claim 9, wherein:

    The connecting rod assembly includes a third rotating shaft connected to the body, a first connecting rod and a second connecting rod connected to the end surface of the third rotating shaft, and the third rotating shaft is located between the air inlet and the Between the vent holes;

    An end of the first connecting rod facing away from the third rotating shaft is connected with an end surface of the first rotating shaft, and an end of the second connecting rod facing away from the third rotating shaft is connected with an end surface of the second rotating shaft;

    The output end of the driver is detachably connected with the third rotating shaft to drive the third rotating shaft to rotate.
11. The heat pump clothes dryer according to any one of claims 7-10, wherein the body includes a mounting plate mounted on the first part and a first part mounted on the mounting plate toward the inner side of the first part. A wall panel, the first wall panel is used to receive the hot and humid air discharged from the hot and humid air outlet of the drum;

    The air inlet hole and the air outlet hole are arranged side by side on the mounting plate, and the air outlet hole is located on a side of the air inlet hole close to the first wall plate.
12. The heat pump clothes dryer of claim 11, wherein the area of the air outlet hole is larger than the area of the air inlet hole.
13. The heat pump clothes dryer according to any one of claims 4-12, wherein the body is provided with a first filter for filtering impurities in the hot and humid air.
14. The heat pump clothes dryer according to any one of claims 1-13, wherein the heat pump clothes dryer further comprises a temperature detection device and a control device, and the temperature detection device is used to detect the operation of the heat pump system Temperature; the control device is used to control the ventilation assembly to introduce the cold air outside the air duct into the first part when the temperature detected by the temperature detection device is greater than a preset temperature, or to control the change The air assembly discharges some hot and humid air in the first part out of the first part.
15. The heat pump clothes dryer of claim 14, wherein the temperature detection device comprises a first temperature detection device for detecting the temperature of the air inlet of the evaporator;

    The control device is used to control the ventilation assembly to introduce the cold air outside the air duct into the first part when the temperature detected by the first temperature detection device is greater than a first preset temperature, or to control all The ventilation assembly discharges some hot and humid air in the first part out of the first part.
16. The heat pump clothes dryer according to claim 14 or 15, wherein the temperature detection device comprises a second temperature detection device for detecting the temperature of the air outlet of the condenser;

    The control device is used to control the ventilation assembly to introduce the cold air outside the air duct into the first part when the temperature detected by the second temperature detection device is greater than a second preset temperature, or to control the The ventilation assembly discharges some hot and humid air in the first part out of the first part.
17. The heat pump clothes dryer according to any one of claims 14-16, wherein the heat pump system further comprises a compressor, and the compressor is located between the evaporator and the condenser; the temperature The detecting device includes a third temperature detecting device for detecting the temperature of the air outlet of the compressor;

    The control device is used to control the ventilation assembly to introduce the cold air outside the air duct into the first part when the temperature detected by the third temperature detection device is greater than a third preset temperature, or to control all The ventilation assembly discharges some hot and humid air in the first part out of the first part.
18. The heat pump clothes dryer according to any one of claims 14-17, wherein the third part of the air duct is provided with a heating element.
19. The heat pump clothes dryer of claim 18, wherein the control device is also used to periodically control the drum to stop rotating, and when the drum is stopped, the control device also controls the drum. The heating element stops heating.
20. A control method of a heat pump clothes dryer, characterized in that the heat pump clothes dryer is started; according to the working temperature of the heat pump system, the ventilation assembly is controlled to introduce cold air into a part of the air duct connecting the evaporator and the hot and humid air outlet of the drum Or, control the ventilation assembly to exhaust some hot and humid air in the air duct.
21. The method for controlling a heat pump clothes dryer according to claim 20, wherein the ventilation component is controlled according to the operating temperature of the heat pump system to introduce cold air into a part of the air at the hot and humid air outlet connecting the evaporator and the drum. In the duct, or controlling the ventilating assembly to exhaust some hot and humid air in the air duct, specifically including:

    When the temperature of the air inlet of the evaporator is greater than the first preset temperature, when the temperature of the condenser's air outlet is greater than the second preset temperature or when the temperature of the compressor's air outlet is greater than the third preset temperature;

    The ventilating assembly is controlled to introduce cold air into a part of the air duct connecting the evaporator and the hot and humid air outlet of the drum, or the ventilating assembly is controlled to discharge some hot and humid air in the air duct.
22. The control method of the heat pump clothes dryer according to claim 20 or 21, further comprising:

    When the drum stops rotating, the heating element is controlled to stop heating, and the heating element is arranged in a part of the air duct connecting the air outlet of the condenser and the dry hot air inlet of the drum.

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