CN111379676B

CN111379676B - Gas-heated deicing device and wind energy power system

Info

Publication number: CN111379676B
Application number: CN202010157957.2A
Authority: CN
Inventors: 孙香宇; 钟晓晖; 张明明; 徐建中
Original assignee: Institute of Engineering Thermophysics of CAS
Current assignee: Institute of Engineering Thermophysics of CAS
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2021-12-07
Anticipated expiration: 2040-03-09
Also published as: CN111379676A

Abstract

The embodiment of the disclosure provides a gas-heated deicing device and a wind energy power system, which belong to the technical field of mechanical engineering. According to the scheme disclosed by the invention, the high-temperature refrigerant gas is directly used as the heat source to heat the air, so that the loss of electric energy is reduced, and the energy utilization rate is improved.

Description

Gas-heated deicing device and wind energy power system

Technical Field

The disclosure relates to the technical field of mechanical engineering, in particular to a gas-heated deicing device and a wind energy power system.

Background

Along with the development of society, people have more and more huge demands on energy, the fossil energy reserves tend to be exhausted in the prior art, and the health and ecological balance of people are influenced by environmental problems brought by the fossil energy. Therefore, the development of clean energy is vigorously carried out, and the development of energy-saving technology has become a current social trend. Wind energy has been studied as a pollution-free renewable energy source, such as wind power generation and wind energy heating. The technology of directly driving the heat pump to heat by using the wind turbine provides a brand new direction for clean heating of the current society.

Under the working condition of the wind turbine in winter, due to the reasons of low temperature, high air humidity, snowfall, freezing rain and the like, an ice layer can be attached to the surface of a wind wheel, particularly in southern areas. Once the surface of the wind wheel is coated with ice, the flow shape of air near the wind wheel is changed, so that the capability of the wind wheel for capturing wind energy is reduced, the load borne by the wind wheel is increased, and the wind wheel is even stopped in severe cases, thereby causing bad influence on the surrounding environment. Therefore, in order to increase the operation time of the wind turbine and prolong the service life of the wind turbine, the deicing and anti-icing technology of the wind wheel of the wind turbine is very important.

At present, three main methods for deicing and anti-icing of wind wheels of wind turbines are available.

Firstly, a mechanical method, namely removing the frozen wind wheel by means of mechanical methods such as oscillation and flutter of the wind wheel. The method is simple to operate and low in cost, but the deicing effect is poor, the noise is high, and the fan needs to be stopped in the deicing process.

And secondly, a layer of special material is attached to the surface of the wind wheel by a coating method, so that water is prevented from being attached to the surface of the wind wheel, and the aim of preventing ice is fulfilled.

And thirdly, heating and deicing technology. Different heating technologies are utilized to generate heat to melt the ice layer on the surface of the wind wheel. There are infrared heating technology, electric heating pad method and gas heating method. The heating deicing technology has high deicing efficiency, is the most researched and proved to be the most commercially valuable deicing and anti-icing system at present. Among them, the gas heating method shows a great commercial potential because of its low cost and uniform heating.

At present, the air-heating deicing can be realized by taking electric heating as a heat source, extending to a wind wheel of a wind turbine through a blower and a conduit, and delivering hot air to an icing position to melt an ice layer or prevent the wind wheel from icing. However, such devices often cause a large amount of power consumption, and do not conform to the principle of "temperature-to-mouth and cascade utilization" of power, and consume too much high-quality power such as power.

Disclosure of Invention

In view of the above, embodiments of the present disclosure provide a gas-heated deicing device and a wind power system, which at least partially solve the problems in the prior art.

In a first aspect, the disclosed embodiment provides a gas-heat deicing device, which is applied to a wind-energy power system, wherein the wind-energy power system comprises a wind wheel, a transmission assembly connected with the wind wheel, and a heat pump circulation assembly connected with the transmission assembly;

the air-heating deicing device comprises a hot air conveying pipe, one end of the hot air conveying pipe is connected with a heat pump circulation assembly, the other end of the hot air conveying pipe is communicated to the wind wheel, and the hot air conveying pipe conveys hot air of the heat pump circulation assembly into the wind wheel;

the air-heating deicing device comprises an air heating assembly, the air heating assembly is connected with the heat pump circulation assembly through a hot air conveying pipe, and the air heating assembly is used for introducing refrigerant gas output by the heat pump circulation assembly and heating the air by using the refrigerant gas;

the heat pump circulation assembly, the air heating assembly and the wind wheel are communicated through a hot air conveying pipe to form a first loop, and the first loop is used for conveying hot air to the wind wheel.

According to a specific implementation of the disclosed embodiment, the heat pump cycle assembly includes a compressor connected to the transmission assembly;

the air heating assembly includes an air heater in communication with the compressor.

According to a specific implementation manner of the embodiment of the present disclosure, the air heating assembly further includes an electric heater and/or an air blower, the electric heater is connected to a hot air delivery pipe of the air heater communicated to the wind wheel, and the air blower is connected to a hot air delivery pipe of the air heater communicated to the wind wheel.

According to a specific implementation manner of the embodiment of the disclosure, the air-heated deicing device further comprises a temperature sensor, an icing detector and a controller, wherein the temperature sensor and the icing detector are mounted on the wind wheel, and the controller is in signal connection with the temperature sensor and the icing detector;

the controller is in signal connection with the electric heater and/or the blower.

According to a specific implementation of the disclosed embodiment, the wind wheel comprises a hub and blades mounted on the hub;

install first rotary joint in the wheel hub, first rotary joint installs on the hot-air conveyer pipe, first rotary joint's air outlet inserts the hot-air inlet of blade, first rotary joint is used for shunting the hot-air of hot-air conveyer pipe transmission to in the blade.

According to a specific implementation manner of the embodiment of the disclosure, the air-heated deicing device further comprises a cold air recovery pipe, one end of the cold air recovery pipe is connected with the wind wheel, and the other end of the cold air recovery pipe is connected with the air heater;

the wind wheel and the air heater are communicated through a cold air recovery pipe to form a second loop, and the second loop is used for enabling cold air flowing out of the wind wheel to flow back into the air heater to be heated.

According to a specific implementation manner of the embodiment of the disclosure, a second rotary joint is arranged in the hub, the second rotary joint is connected to the cold air recovery pipe, and an airflow outlet of the second rotary joint is connected to a cold air outlet of the blade.

According to one specific implementation of the disclosed embodiment, the transmission assembly includes a gear box connected to the compressor;

a radiator is mounted in the gear box and/or the compressor and communicated to the air heater through a pipeline.

According to a specific implementation manner of the embodiment of the present disclosure, an electric heating pipe is installed in the blade.

In a second aspect, embodiments of the present disclosure provide a wind-powered system comprising a hot-air de-icing apparatus as defined in any one of the above.

The air-heated deicing device in the embodiment of the disclosure communicates the heat pump circulation assembly with the air heater through the hot air conveying pipe, the refrigerant gas led out through the heat pump circulation assembly is conveyed into the air heater, the air is heated by the high-temperature refrigerant gas in the air heater, and the heated hot air is conveyed into the wind wheel through the hot air conveying pipe, so that the blades of the wind wheel are heated. According to the scheme disclosed by the invention, the high-temperature refrigerant gas is directly used as the heat source to heat the air, so that the loss of electric energy is reduced, and the energy utilization rate is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a gas-heated deicing device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a wind wheel in a wind power system according to an embodiment of the present disclosure;

FIG. 3 provides a schematic view of a rotor blade in a wind power system according to an embodiment of the present disclosure;

summary of reference numerals:

100. a gas-heated de-icing device; 201. a blade-201; 2011. tip-2011; 2012 heating pipes; 2013. A web; 2014. a trailing edge; 2015 leading edge; 202. a hub; 203. a nacelle; 101. an air heater; 102. a blower 103, an electric heater; 104. a temperature sensor; 105. an icing detector; 106. A controller; 107. a valve; 108. a heat pump cycle assembly; 1081. a compressor; 1082. a heat sink; 1083. a gear case; 1084. a condenser; 1085. a throttle valve; 1086. an evaporator; 109. a hot air delivery pipe; 110. a cold air recovery pipe; 111. a first rotary joint; 112. a second rotary joint.

Detailed Description

The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

The disclosed embodiment provides a gas-heated de-icing apparatus 100.

As shown in fig. 1, a thermal air deicing device 100 provided by the embodiment of the present disclosure is applied to a wind power system, where the wind power system includes a wind wheel, a transmission component connected to the wind wheel, and a heat pump cycle component 108 connected to the transmission component;

the air-heated deicing device 100 comprises a hot air conveying pipe 109, one end of the hot air conveying pipe 109 is connected with a heat pump circulation assembly 108, the other end of the hot air conveying pipe 109 is communicated to the wind wheel, and the hot air conveying pipe 109 conveys hot air of the heat pump circulation assembly 108 into the wind wheel;

the air-heated deicing device 100 comprises an air heating assembly, the air heating assembly is connected with the heat pump circulation assembly 108 through a hot air conveying pipe 109, and the air heating assembly is used for introducing refrigerant gas output by the heat pump circulation assembly 108 and heating the air by using the refrigerant gas;

the heat pump circulation assembly 108, the air heating assembly and the wind wheel are communicated through a hot air conveying pipe 109 to form a first loop, and the first loop is used for conveying hot air to the wind wheel.

Specifically, the gas-heated deicing apparatus 100 in the present embodiment includes a first circuit for conveying hot air, the first circuit includes a heat pump cycle assembly 108 for generating high-temperature refrigerant gas, an air heating assembly connected to the heat pump cycle assembly 108, and a pipeline for circulating the refrigerant gas is disposed in the air heater 101, and the high-temperature refrigerant gas releases heat in the air heating assembly, thereby heating the surrounding air. The first loop further comprises a pipeline communicated from the air heating assembly to the impeller, the outlet end of the air heating assembly is communicated to the wind wheel through a hot air conveying pipe 109, and hot air is conveyed into the wind wheel, so that the effects of preventing and removing ice of the wind wheel are achieved. The first loop can be provided with a plurality of branches to accelerate the circulation of hot air and improve the efficiency of the hot air circulating to the wind wheel. And a plurality of branches can be provided with valves 107 on the pipeline as required, so that the number of open branches can be selected according to the external temperature condition.

In the air-heated deicing device 100 in the embodiment of the present disclosure, the heat pump circulation assembly 108 is communicated with the air heater 101 through the hot air delivery pipe 109, the refrigerant gas led out through the heat pump circulation assembly 108 is delivered into the air heater 101, the air is heated by the high-temperature refrigerant gas in the air heater 101, and the heated hot air is delivered into the wind wheel through the hot air delivery pipe 109, so that the blades 201 of the wind wheel are heated. According to the scheme disclosed by the invention, the high-temperature refrigerant gas is directly used as the heat source to heat the air, so that the loss of electric energy is reduced, and the energy utilization rate is improved.

In another disclosed embodiment, the heat pump cycle assembly 108 includes a compressor 1081, the compressor 1081 being coupled to the drive assembly; the air heating assembly includes an air heater 101, the air heater 101 being in communication with the compressor 1081.

Specifically, the transmission assembly is driven by the wind wheel to operate, and then drives the heat pump circulation assembly 108 connected with the transmission assembly to work. The heat pump circulation assembly 108 in the embodiment of the present disclosure includes a compressor 1081, the compressor 1081 is driven by a transmission assembly to start up, when the compressor 1081 is working, low-temperature and low-pressure refrigerant gas is sucked from an air suction pipe, a piston is driven by operation to compress the refrigerant gas, and then high-temperature and high-pressure refrigerant gas is discharged to an air discharge pipe, and the high-temperature and high-pressure refrigerant gas is further delivered to the air heater 101, so that heat is released to air in the air heater 101 to heat the air. It should be noted that the transmission assembly includes a gear box 1083, the gear box 1083 is connected to the compressor 1081, and the gear box 1083 transmits the rotational power of the wind wheel to the compressor 1081, so as to drive the piston of the compressor 1081 to work.

A valve 107 is further installed in the hot air duct 109 between the air heater 101 and the compressor 1081, and the operation of the first circuit is controlled by opening and closing the valve 107. When the deicing and the anti-icing are needed, the valve 107 is opened, so that the high-temperature and high-pressure refrigerant gas in the compressor 1081 enters the air heater 101 to finish the deicing operation of the wind wheel. When the ice and ice are not needed to be prevented and removed, the valve 107 is closed, and the high-temperature and high-pressure refrigerant gas generated by the compressor 1081 flows into the condenser 1084 according to a normal pipeline, so that the heat cycle operation of the heat pump cycle assembly 108 in the wind power system is completed. Specifically, after flowing into the condenser 1084, the heat pump cycle is completed by the throttle valve 1085, the evaporator 1086, and then the return to the compressor 1081.

The working characteristics of the compressor 1081 in the wind energy heating system according to the embodiment of the present disclosure are utilized, that is, the compressor 1081 is capable of generating high-temperature and high-pressure refrigerant gas, so as to heat air. The energy utilization rate of the unit is improved, and the loss of electric energy is reduced.

In another disclosed embodiment, the air heating assembly further comprises an electric heater 103 and/or a blower 102, the electric heater 103 is connected to a hot air duct 109 communicating the air heater 101 to the wind wheel, and the blower 102 is connected to the hot air duct 109 communicating the air heater 101 to the wind wheel.

In order to avoid the situation that the air is heated by only the refrigerant gas generated by the compressor 1081 under some extreme conditions, which is not enough to melt the ice cubes on the wind wheel, in this embodiment, an electric heater 103 is connected after the air heater 101, and the air is further heated by the electric heater 103, so as to increase the temperature of the air that has been heated in the air heater 101. The electric heater 103 mainly heats air through the electric heating pipe 2012 therein, and can heat the air to several hundred degrees centigrade as required, and under some extreme conditions, the consumption of energy can be reduced by turning on the electric heater 103 upside down, and the service life of the wind wheel is prolonged.

Further, the electric heater 103 is additionally arranged behind the air heater 101, so that the temperature of the air can be further increased, the temperature of the hot air reaching the wind wheel is guaranteed, and the phenomenon that the deicing effect is reduced due to the reduction of heat in the transmission process of the hot air is avoided.

In addition, in order to increase the transfer speed of the hot air in the duct, a blower 102 is connected between the air heater 101 and the wind wheel. The blower 102 is mainly used for providing power for hot air, reducing heat loss of the hot air in the transmission process, and improving the deicing effect on the wind wheel. The number of the blower 102 and the electric heater 103 can be set according to the requirement, and in some ultra-large wind power systems, the number of the electric heater 103 and the blower 102 can be increased according to the situation.

In another disclosed embodiment, the thermal air deicing apparatus 100 further comprises a temperature sensor 104 mounted on the wind wheel, an icing detector 105, and a controller 106 in signal connection with the temperature sensor 104 and the icing detector 105; the controller 106 is in signal communication with the electric heater 103 and/or the blower 102.

In specific application, the icing condition of the wind wheel blades 201 is monitored by using the temperature sensor 104 and the icing sensor, when the icing condition of the blades 201 is detected, the controller 106 gives an instruction, the air is heated by using high-temperature exhaust gas of the compressor 1081 in the heat pump circulating system, and then the hot air is introduced into the wind wheel blades 201 through the blower 102. The connection between the temperature sensor 104 and the icing detector 105 and the controller 106 may be a wired connection, or a wireless communication connection, and the specific wireless communication may be a bluetooth connection or a WiFi signal connection, which is not limited herein. In addition, the heat pump cycle assembly 108 and the air heater 101 are connected to the controller 106 for operating these components as needed.

By turning on the operation of the air heating assembly under the control of the controller 106 by means of the temperature sensor 104 and the icing detector 105, the energy consumption of the air heating assembly when the air heating assembly is continuously operated in the case of non-icing wind wheels is reduced.

As shown in fig. 2, in another disclosed embodiment, the wind rotor includes a hub 202 and blades 201 mounted on the hub 202; a first rotary joint 111 is installed in the hub 202, the first rotary joint 111 is installed on the hot air delivery pipe 109, an airflow outlet of the first rotary joint 111 is connected to a hot air inlet of the blade 201, and the first rotary joint 111 is used for shunting hot air delivered by the hot air delivery pipe 109 into the blade 201.

As shown in fig. 1 and 2, the hot air flows through the hot air duct 109 by the blower 102, and enters the blades 201 through the first rotary joint 111 at the hub 202, and it should be noted that the first rotary joint 111 includes a plurality of outlets, and the plurality of outlets respectively correspond to the hot air inlets of different blades 201. The wind wheel in this embodiment comprises three blades 201, and the three blades 201 are arranged on the hub 202 at equal intervals. The first rotary joint 111 diverts the hot air to the three blades 201, enabling de-icing of the three blades 201.

The first rotary joint 111 of the present embodiment is beneficial to uniformly distributing the hot air to the three blades 201 of the hub 202, so as to improve the uniformity of hot air distribution.

In another disclosed embodiment, the air-heated deicing device 100 further comprises a cold air recovery pipe 110, one end of the cold air recovery pipe 110 is connected to the wind wheel, and the other end of the cold air recovery pipe 110 is connected to the air heater 101; the wind wheel and the air heater 101 are communicated through a cold air recovery pipe 110 to form a second loop, and the second loop is used for returning the cold air flowing out of the wind wheel to the air heater 101 for heating.

The embodiment of the present disclosure adds another loop, which is used to recover the air flowing out from the blade 201 of the wind wheel, so that the air is not directly discharged from the blade tip 2011 of the blade 201. After the hot air flows over the blades 201, because the blades 201 are frozen, the temperature of the surface of the blades 201 is low, the temperature of the hot air flowing through the blades is reduced, the air possibly also participates in partial heat, the air is continuously introduced into the air heater 101 through the cold air recovery pipe 110, the air is further heated by high-temperature refrigerant gas, a cycle is completed, and the utilization rate of the hot air is improved. Through the second loop that this disclosed embodiment adds, reduced the loss of waste heat.

It should be noted that, in order not to increase the weight of the blade 201, the present disclosure directly uses the web 2013 of the blade 201 to divide the channel generated after the blade 201 as the airflow channel. As shown, the hot air flow passes from one side and then out the other on both sides separated by web 2013. Of course, the blade 201 could also be divided into three channels by the webs 2013, and the hot air flow would then pass through the three channels divided by the webs 2013 in a serpentine flow manner, but would eventually flow out of the cold air outlet of the blade 201 and continue into the air heater 101.

In another disclosed embodiment, a second rotary joint 112 is disposed in the hub 202, the second rotary joint 112 is connected to the cold air recovery pipe 110, and an airflow outlet of the second rotary joint 112 is connected to a cold air outlet of the blade 201. Similarly, the provision of the second rotary joint 112 enables the air flowing out of the blade 201 to flow uniformly into the air heater 101.

In another disclosed embodiment, the transmission assembly includes a gearbox 1083, the gearbox 1083 being coupled to the compressor 1081; a radiator 1082 is mounted within the gearbox 1083 and/or the compressor 1081, the radiator 1082 being ducted to the air heater 101.

In order to prevent the heat from being directly discharged to cause energy loss, the gear box 1083 and the compressor 1081 of the present embodiment are respectively provided with a radiator 1082. A transfer duct is connected to the gear box 1083, and this part of the heat is transferred to the air heater 101 through the transfer duct. Similarly, a transfer pipe is connected to the compressor 1081, and heat is transferred to the air heater 101 through the transfer pipe. It should be noted that the two delivery conduits of the gear box 1083 and the compressor 1081 may be two separate conduits, or may be combined into one conduit, and the heat extracted from the compressor 1081 and the heat extracted from the gear box 1083 are merged and delivered to the air heater 101 together. In addition, the pipeline for leading out and conveying the heat of the compressor 1081 and the gearbox 1083 to the air heater 101 and the cold air conveying pipeline flowing out from the blade 201 are converged on one pipeline, and the three parts of hot air are conveyed to the air heater 101 to circulate the hot air in the device.

In the embodiment, the heat radiator 1082 is installed in the gear box 1083 and the compressor 1081, the heat released by the gear box 1083 and the compressor 1081 during operation is collected through the heat radiator 1082, and the collected heat is conveyed to the air heater 101 through a pipeline, so that the energy utilization rate of the device during operation is greatly improved.

In another disclosed embodiment, a heating tube 2012 is disposed within the blade 201. Because the heat conductivity that blade 201 spread the layer material is relatively poor, can lay the great position pre-buried heating pipe 2012 of layer thickness, specifically predetermine heating pipe 2012 at blade 201 leading edge 2015 and roof portion. By embedding the heating pipes 2012 at the position with larger thickness, the ice melting efficiency of the ice layer at the position is improved, and the problem of low efficiency caused by that the ice layer is melted only through hot air due to the larger thickness at the position is solved. Of course, in other embodiments, a material with a high thermal conductivity or a thinned layer can be used to enhance the heat exchange performance, so as to improve the ice melting rate.

Corresponding to the above method embodiment, referring to fig. 1, the disclosed embodiment also provides a wind energy power system, including the gas-heated deicing apparatus 100 as described above.

Wherein the heat pump cycle assembly 108 includes a compressor 1081, an evaporator 1086, a condenser 1084, and a throttle 1085.

The specific working process comprises the following steps:

in warm seasons, the wind turbine is operating normally, and the gas-heated deicing apparatus 100 may be selected not to operate. As shown in fig. 1, after entering winter, the temperature sensor 104 and the icing detector 105 are in a normally open state, and constantly monitor whether the blade 201 of the wind turbine is iced, and when an icing signal of the blade 201 is received, the signal is transmitted to the controller 106, and then the controller 106 gives an instruction to open the valve 107 and the blower 102, and the hot air generated by the air heater 101 is delivered to the blade 201 through the hot air delivery pipe 109. As shown in fig. 2 and 3, since the rotor blade 201 is now a rotating part with respect to the nacelle 203, in order to smoothly feed the hot air into the blade 201, it is necessary to feed the air into the root of the blade 201 at the hub 202 using the first rotary joint 111 and to feed the air out of the root of the blade 201 using the second rotary joint 112. Furthermore, the first rotary joint 111 ensures that the hot air enters each blade 201 as uniformly as possible. For a small blade 201 with only one web 2013, hot air enters from the front edge 2015 side of the blade 201 when entering the blade 201, because the front edge 2015 is the position where the blade 201 is most prone to icing, and the selection of the hot air entering from the position can increase the heat transfer amount and accelerate ice melting by improving the heat transfer temperature difference. Of course, other access means are possible for the large blade 201. Meanwhile, because the heat conductivity of the layer material laid by the blade 201 is poor, the heating pipe 2012 can be embedded at the position with larger layer thickness or the heat exchange performance can be enhanced by adopting the material with high heat conductivity coefficient or thinning the layer. For a blade 201 with two webs 2013, the airflow enters from the leading edge 2015 and the trailing edge 2014 and exits from the middle of the two webs 2013. The cooled air flow further passes through the second rotary joint 112 and enters the cold air recovery pipe 110, where the cold air flow is merged with the outflow air flow of the radiator 1082, which is a part of the gear box 1083, the compressor 1081, and the like, and enters the air heater 101, and thus, the air flow completes one cycle. After ice detector 105 detects the end of the ice melt, controller 106 acts to close valve 107 and blower 102.

When the ambient temperature reaches the freezing point but the blades 201 are not frozen, the device can be operated at low power, for example, the air discharge from the compressor 1081 to the air heater 101 is reduced or the rotation speed of the blower 102 is reduced, so that the blades 201 are heated to achieve the anti-icing effect. According to actual needs, the electric heater 103 can be arranged to cope with the situation that the blade 201 is frozen and the wind turbine cannot be started due to the excessively thick ice layer, the electric heater 103 is used for melting ice firstly, then the equipment is enabled to operate normally, and the operation is carried out according to the working conditions.

The wind power system may correspondingly execute the content in the above method embodiment, and details of the part not described in detail in this embodiment refer to the content described in the above method embodiment, which is not described herein again.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. The gas-heat deicing device is characterized by being applied to a wind power system, wherein the wind power system comprises a wind wheel, a transmission assembly connected with the wind wheel and a heat pump circulation assembly connected with the transmission assembly;

the gas-heated deicing device comprises a hot air conveying pipe, a heat pump circulation assembly and an air heating assembly;

the heat pump circulation assembly comprises a compressor, the compressor is connected with the transmission assembly, the transmission assembly comprises a gear box, the gear box is connected with the compressor, and the gear box transmits the rotating power of the wind wheel to the compressor;

the air heating assembly includes an air heater in communication with the compressor; the air heating assembly is used for introducing refrigerant gas output by the compressor and heating the air by using the refrigerant gas;

the air heating assembly is connected with the wind wheel through the hot air conveying pipe, and the heated air is conveyed to the wind wheel by the air heating assembly; the heat pump circulation assembly, the air heating assembly and the wind wheel are communicated through a hot air conveying pipe to form a first loop, and the first loop is used for conveying hot air to the wind wheel;

the air-heating deicing device further comprises a cold air recovery pipe, one end of the cold air recovery pipe is connected with the wind wheel, and the other end of the cold air recovery pipe is connected with the air heater;

2. Air-heated de-icing apparatus according to claim 1, wherein said air heating assembly further comprises an electric heater connected to a hot air duct of said air heater communicating with said wind wheel and/or a blower connected to a hot air duct of said air heater communicating with said wind wheel.

3. The gas-heated deicing device according to claim 2, further comprising a temperature sensor mounted on the wind wheel, an icing detector, and a controller in signal connection with the temperature sensor and the icing detector;

4. Hot gas deicing device according to claim 1, wherein the wind wheel comprises a hub and blades mounted on the hub;

5. Gas-heated deicing device according to claim 4, characterized in that a second rotary joint is arranged in the hub, said second rotary joint being connected to the cold air recovery pipe, the air flow outlet of said second rotary joint being connected to the cold air outlet of the blade.

6. Gas-heated de-icing arrangement according to one of the claims 1 to 5,

7. Gas-heated de-icing arrangement according to any one of claims 4 to 5, characterised in that said blades have electric heating tubes mounted therein.

8. A wind powered system characterized in that it comprises a hot gas de-icing arrangement according to any one of claims 1 to 7.