WO2018082625A1

WO2018082625A1 - Clothes dryer

Info

Publication number: WO2018082625A1
Application number: PCT/CN2017/109172
Authority: WO
Inventors: 施衍奇; 邴进东; 王健; 孙鹏举
Original assignee: 青岛海尔洗衣机有限公司
Priority date: 2016-11-02
Filing date: 2017-11-02
Publication date: 2018-05-11
Also published as: CN108018690A

Abstract

A clothes dryer, comprising: a case body (1) and a back plate (6) fixedly connected to each other; a drum (2) for accommodating clothes is mounted in the case body (1); a lower part of the case body (1) is provided with an air inlet (a) and an air outlet (b); a rear end of the drum (2) is communicated with the air inlet (a) by means of an intake channel, and a front end of the drum (2) is communicated with the air outlet (b) by means of an exhaust channel; a ventilation device is mounted in the air inlet (a); a heat exchanger (8) is connected between the intake channel and the exhaust channel; the rear end of the drum (2) is provided with a heating device; and a thermal insulating layer (5) is provided between the heating device and the back plate (6). The clothes dryer can effectively reduce heat loss and improve energy efficiency level.

Description

Dryer

Technical field

The present disclosure relates to the technical field of clothes dryers, for example, to an energy-saving clothes dryer capable of reducing heat loss, shortening drying time, and improving the energy efficiency of a clothes dryer.

Background technique

The working principle of the dryer is: the rotation of the fan provides power to direct the air to flow, and the dried air enters the drum after being heated by the heater. After the hot air contacts the clothes, the moisture is taken away, and then the water is discharged to the external environment. , so work until the clothes are completely dried. When the dryer is in operation, the energy consumed by the general heating device accounts for more than 90%. How to make full use of this part of energy and improve the energy efficiency level has always been a major problem faced by the dryer design workers. At present, dryer manufacturers are adjusting the heating power and air flow rate, improving the structure of the drum agitator to make the clothes turn more evenly, but the energy consumption of the dryer is still large.

The heating device of the existing clothes dryer is located at the rear of the drum, and is fixed between the drum and the rear plate. The air flows into the drying body to take away most of the heat, and a small amount of heat is radiated to the surrounding environment through the rear plate. in. At the same time, the dryer also takes a lot of heat when it removes the humid air. Especially when the clothes are about to dry, the air temperature of the air outlet is continuously increased, and a large amount of heat is discharged into the surrounding environment, resulting in Waste of heat.

Therefore, there is a need for a dryer that can effectively reduce heat loss, shorten drying time, and improve energy efficiency to solve the above problems.

Summary of the invention

The embodiment of the invention provides a clothes dryer, which increases the heat of the air inlet by recovering part of the heat of the air outlet, thereby effectively reducing the heat loss of the dryer and improving the energy efficiency level.

A clothes dryer comprising:

a fixedly connected box body and a rear plate, wherein the box body is provided with a drum for accommodating clothes, the box The lower part of the body is provided with an air inlet and an air outlet, and a rear end of the drum is connected to the air inlet through an air inlet passage, and a front end of the drum is connected to the air outlet through an air exhaust passage, and the air inlet is installed in the air inlet a heat exchanger is connected between the exhaust passage and the air inlet passage; a heating device is disposed at a rear end of the drum, and a heat insulation layer is disposed between the heating device and the rear plate.

Optionally, the heating device comprises: a heating plate fixed on the rear plate and a heater disposed on the heating plate, wherein the heat insulating layer is disposed between the heating plate and the rear plate.

Optionally, the heater is one of an electric heating wire, an electric heating rod, a ceramic heating element, an infrared heating element or an electromagnetic heating element.

Optionally, the heat exchanger is a heat pipe heat exchanger comprising a base pipe and a plurality of heat dissipating fins disposed on the base pipe.

Optionally, the material of the base pipe is steel, and the material of the heat dissipation fin is aluminum.

Optionally, an outer layer of the rear plate is further provided with an insulation layer.

Optionally, the material of the heat insulating layer and the heat insulating layer is one of a foaming material, an insulating cotton or an insulating cotton.

Optionally, the ventilation device comprises a motor and a fan.

Optionally, a temperature sensor is disposed in the drum, and a controller is disposed outside the casing, and the controller is respectively connected to the heater and the temperature sensor.

Optionally, the air inlet is disposed at a front end of the box, the air outlet is disposed at a rear end of the box, and the position of the air inlet is lower than a position of the air outlet.

In the embodiment of the invention, a heat exchanger is added in the exhaust passage, and the heat exchanger is used to exchange heat between the discharged hot and humid air and the sucked fresh air, thereby increasing the airflow temperature of the air inlet, effectively reducing heat loss of the dryer, and improving heating. The working efficiency of the device reaches the role of energy recovery. The heat insulation layer is added between the heating device and the rear plate, which greatly improves the heat preservation structure of the clothes dryer, reduces the heat loss during the operation of the clothes dryer, shortens the drying time, and significantly improves the energy efficiency level of the clothes dryer. The clothes dryer of the embodiment of the invention has the advantages of simple structure, convenient installation and use, and effectively improves the air temperature in the drum under the condition of constant heater power, improves the drying effect of the dryer, saves energy and reduces cost.

DRAWINGS

1 is a schematic structural view of a clothes dryer provided by an embodiment;

2 is an exploded view of a clothes dryer provided in an embodiment.

In the picture:

1, box; 2, roller; 3, heater; 4, heating plate; 5, insulation layer; 6, rear plate; 7, insulation layer; 8, heat exchanger; 9, motor; 10, fan; , air inlet; b, exhaust vent.

The direction indicated by the arrow in the figure is the direction of air flow.

detailed description

As shown in FIG. 1 and FIG. 2, a clothes dryer includes: a casing 1, a drum 2, a heating device, a rear plate 6, and a ventilation device, wherein a rear end of the casing 1 is open, and the drum 2 is rotatably Installed in the casing 1, the rear panel 6 is attached to the opening at the rear end of the casing 1. The lower part of the box body 1 is respectively provided with an air inlet a and an air outlet b. The inside of the box 1 is provided with an air inlet passage and an air exhaust passage. In this embodiment, the rear end of the drum 2 communicates with the air inlet a through the air inlet passage, and the front end of the drum 2 communicates with the air outlet b through the air exhaust passage. When working, the airflow after drying and heating passes through the air inlet a, The air inlet passage flows into the drum 2 to dry the wet laundry in the drum 2, and then the airflow containing a large amount of water vapor is discharged to the casing 1 through the exhaust passage and the exhaust port b.

In order to achieve smooth circulation of the gas in the casing 1, a ventilation device is installed in the air inlet a. The ventilation device is preferably a motor 9 and a fan 10. The motor 9 drives the fan 10 to rotate to suck air from the air inlet a into the casing. 1 internal. Optionally, the ventilation device may also be a fan, such as an axial flow fan, a centrifugal fan, or the like. In order to further enhance the air flow effect and shorten the drying time, a set of motors and fans may also be disposed at the air outlet b to extract air from the air outlet b to the outside of the cabinet 1.

A heating device is disposed between the rear end of the drum 2 of the embodiment and the rear plate 6 for heating the airflow entering the drum 2 to improve the drying efficiency of the laundry. Optionally, the heating device is a heating plate 4 fixed on the rear plate 6 and a heater 3 disposed on the heating plate 4. The heating plate 4 is arranged to make the heat radiation more uniform and prevent the local air temperature from being too high to cause damage to the clothes. damage. Alternatively, the heater 3 may select one or more of an electric heating wire, an electric heating rod, an electric heating coil, a ceramic heating element, an infrared heating element, and an electromagnetic heating element. When the dryer is running, the air in the air inlet passage enters the heater 3 via the heating tray 4 When heated, the hot air enters the drum 2 to carry away the moisture in the laundry, and then is discharged to the surrounding environment via the exhaust port b.

Since the heater 3 transfers part of the heat to the heating plate 4 during the operation of the dryer, and then to the rear plate 6, and finally diffuses into the surrounding environment, causing energy waste, the present embodiment is in the heating plate 4 A heat insulating layer 5 having a certain thickness is installed on the back surface, and the heat insulating layer 5 has excellent properties of flame retardancy, high temperature resistance and heat insulation, and may be a certain foaming material, or may be heat insulating cotton or heat insulating cotton, etc. By blocking the conduction of heat to the rear plate 6, the unnecessary energy loss is reduced. In order to further enhance the heat preservation effect of the casing 1, in the embodiment, an insulation layer 7 having a certain thickness is further mounted on the outer surface of the rear plate 6, and the insulation layer 7 may be made of the same material or different from the heat insulation layer 5. material.

A heat exchanger 8 is further disposed in the exhaust passage of the embodiment. The heat exchanger 8 is preferably a heat pipe heat exchanger, and includes a base pipe and a plurality of heat dissipating fins disposed at two ends of the base pipe, wherein one end of the base pipe is Inside the exhaust passage, the other end is in the air inlet passage. The heat pipe heat exchanger absorbs heat from the exhaust passage, and then conducts heat to the air inlet passage through the heat radiating fins, and then distributes the heat to the tank 1 through the flowing air provided by the fan to heat the air in the tank 1. Therefore, the air inlet temperature of the dryer is improved, and the airflow temperature in the drum 2 is increased under the condition that the power of the dryer heater 3 is constant, the drying effect is remarkably improved, and energy is saved.

Generally, the heat pipe heat exchanger can be made of materials such as copper, aluminum or stainless steel. Optionally, the heat pipe heat exchanger of the embodiment is a steel-aluminum composite heat exchanger, wherein the material of the base pipe is stainless steel, and the heat dissipating fins are The material is aluminum. The heat exchanger utilizes the pressure resistance of the steel pipe and the high-efficiency heat conduction performance of the aluminum, which significantly improves the working efficiency of the heat exchanger and prolongs its service life. Optionally, the heat dissipating fins of the heat exchanger may be fixedly connected to the base pipe by a structure such as a sheet type, a string type, a welding piece type or a rolled sheet type.

In this embodiment, the air inlet a is disposed at the front end of the casing 1, and the air outlet b is disposed at the rear end of the casing 1. Since the air inlet a and the air outlet b are separately disposed, the high humidity pollution can be effectively prevented. The gas enters the drum 2 again; at the same time, the position of the air inlet a is lower than the position of the air outlet b, which is advantageous for extending the path of the air inlet passage, so that the airflow is smoother and the temperature is more uniform. Moreover, in the present embodiment, a filter grill is further provided at the air inlet a to prevent foreign matter from entering the drum 2 to cause pollution to the clothes; and a wire filter screen is disposed at the air outlet b for preventing the wire falling on the clothes. Waiting to be discharged into the external environment, polluting the air.

The drum 2 of the embodiment is a horizontal drum, and the direction of the airflow during operation is parallel to the axial direction of the drum 2, thereby increasing the contact area of the airflow with the clothes, preventing the clothes from being pressed against the drum, facilitating the circulation of the air, and increasing the drying clothes. The amount of moisture discharged from the machine reduces energy consumption. Optionally, a temperature sensor is further disposed in the drum 2, It is used for detecting the temperature inside the cylinder in real time to prevent burnt clothing; at the same time, the controller 1 is externally provided with a controller, and the controller is respectively connected with the heater 3 and the temperature sensor for controlling the operation of the heater 3 according to the detection result of the temperature sensor. . More optionally, the drum 2 is further provided with an ultraviolet sterilizing device that emits ultraviolet rays, and can perform ultraviolet sterilization on the clothes in the drum 2.

The dryer of the present invention can recover a part of the heat of the exhaust port b by installing the heat exchanger 8 and adding the heat insulating layer 5 and the heat insulating layer 7, and reduce the heat from the casing 1 and the rear plate 6, and the heat is increased. The drying temperature of the clothes shortens the drying time and improves the energy efficiency rating of the clothes dryer. It has been proved by practice that the clothes dryer of the embodiment can save more than 10% of electricity.

Optional industrial applicability

The dryer of the present disclosure reduces the heat loss of the clothes dryer, achieves the function of energy recovery, improves the heat preservation structure of the clothes dryer, reduces the heat loss when the clothes dryer is working, shortens the drying time, and improves the drying machine. Energy efficiency rating.

Claims

A clothes dryer comprising: a fixedly connected box body (1) and a rear plate (6), wherein the box body (1) is provided with a drum (2) for accommodating laundry, and the lower part of the box body (1) An air inlet (a) and an air outlet (b) are provided, the rear end of the drum (2) is communicated with the air inlet (a) through an air inlet passage, and the front end of the drum (2) passes through the air exhaust passage The air outlet (b) is connected to the air inlet (a), wherein a ventilation device is installed, wherein a heat exchanger (8) is connected between the air outlet passage and the air inlet passage; the roller (2) The rear end is provided with a heating device, and a heat insulating layer (5) is disposed between the heating device and the rear plate (6).
The clothes dryer according to claim 1, wherein said heating means comprises: a heating plate (4) fixed to the rear plate (6) and a heater (3) provided on the heating plate (4), The heat insulating layer (5) is provided between the heating plate (4) and the rear plate (6).
The clothes dryer according to claim 2, wherein the heater (3) is one of an electric heating wire, an electric heating rod, a ceramic heating element, an infrared heating element, or an electromagnetic heating element.
The clothes dryer of claim 1, wherein the heat exchanger (8) is a heat pipe heat exchanger comprising a base pipe and a plurality of heat dissipating fins disposed on the base pipe.
The clothes dryer of claim 4, wherein the base pipe is made of steel and the heat dissipating fin material is aluminum.
The clothes dryer according to claim 2, wherein the outer portion of the rear plate (6) is further provided with a heat insulating layer (7).
The clothes dryer according to claim 6, wherein the heat insulating layer (5) and the heat insulating layer (7) are made of one of a foaming material, an insulating cotton or an insulating cotton.
A clothes dryer according to any one of claims 1 to 7, wherein the ventilation means comprises a motor (9) and a fan (10).
The clothes dryer according to claim 8, wherein a temperature sensor is disposed in the drum (2), and a controller is disposed outside the casing (1), the controller and the heater (3) and The temperature sensors are connected.
The clothes dryer according to claim 9, wherein the air inlet (a) is provided at a front end of the casing (1), and the air outlet (b) is provided at a rear end of the casing (1), and The position of the air inlet (a) is lower than the position of the air outlet (b).