CN208095438U - The greenhouse heating system that directly-heated and accumulation of energy intelligently switch - Google Patents

Abstract

The utility model discloses a greenhouse heating system with intelligent switching between direct heating and energy storage, which comprises an electric direct heating device, a heat storage device, a heating detection module and a controller. The heating medium, the heating detection module is at least used to detect the temperature in the greenhouse, and the controller is used to receive temperature detection data and control to turn on the electric direct heating device or heat storage device to provide heating to the greenhouse. The utility model can organically combine electric direct heat heating and off-peak electric energy storage heating and switch intelligently, thereby reducing the electric load and the volume of the heat storage device.

Description

Greenhouse heating system with intelligent switching of direct heat and energy storage

technical field

The utility model belongs to the technical field of greenhouse heating, in particular to a greenhouse heating system with intelligent switching between direct heating and energy storage.

Background technique

With the development of the economy, greenhouses in Northwest China are rapidly developing toward intelligence and high-end, and the problem of efficient and intelligent heating in greenhouses urgently needs to be solved. Combined with local policies and actual conditions, the northwest region has a large amount of available valley power, abandoned wind power, and abandoned photovoltaics. At present, there are many practical cases of heat storage and heating with valley electricity. However, due to the large heating area of some greenhouses, the corresponding heat demand increases. The volume of the heat storage box is huge, and the heat loss will also increase due to the increase of the volume of the heat storage box, thus resulting in relatively increased manufacturing difficulties and operating costs.

Utility model content

The technical problem to be solved by the utility model is to provide a greenhouse heating system with intelligent switching between direct heat and energy storage, which organically combines electric direct heat heating and valley electric energy storage heating and intelligently switches, thereby reducing power load and heat storage Device volume.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

Greenhouse heating system with intelligent switching of direct heat and energy storage, including electric direct heat device, heat storage device, heating detection module and controller, the heat storage device is used to store the heating medium heated by valley electricity, the heating detection The module is at least used to detect the temperature in the greenhouse, and the controller is used to receive temperature detection data and control to turn on the electric direct heating device or heat storage device to provide heating to the greenhouse.

In the above technical solution, two heating methods, direct electric heating and off-peak electric heat storage, are adopted. Through the control of the controller, direct electric heating is preferred for heating during off-peak hours, and off-peak electric heat storage is used for heating, and During the off-peak power period, the controller can be used to intelligently switch between electric direct heat heating and off-peak power heat storage heating according to the heating temperature in the greenhouse, thus realizing the combination of electric direct heat heating and off-peak power storage heat storage heating. Organic combination and intelligent switching. Since electric direct heat heating uses less electricity to achieve the same heating effect than valley electric heat storage heating, this technical solution can reduce the electricity load of greenhouse heating. Since this technical solution no longer relies solely on valley electricity heat storage for greenhouse heating, the heating work undertaken by the heat storage device is reduced, and the volume of the heat storage device can be designed to be smaller, which is conducive to reducing the heat loss of the heat storage device. Manufacturing and operating costs can also be further reduced. This technical solution can also freely switch between electric direct heating and heat storage device energy storage, so that while maintaining the heating effect, heat storage can also be carried out to achieve both heating and heat storage. , to further improve heating efficiency.

As a further improvement of the technical solution of the utility model, the electric direct heating device is used to heat the heating medium, and the heated heating medium is used to transport the heat storage device and supply heat to the greenhouse. Through this technical solution, the heating medium heated by the electric direct heating device can not only enter the heat storage device for storage, but also supply heat to the greenhouse when switching to electric direct heating, so that the direct heating and energy storage can be intelligently switched for greenhouse heating The system only needs a set of electric direct heating device to complete the heat storage and heating work. On the one hand, it makes the structure of the greenhouse heating system more concise, and on the other hand, it helps to reduce the manufacturing and operating costs of the greenhouse heating system.

As a further improvement of the technical solution of the utility model, the heat storage device is provided with an anti-corrosion and/or heat preservation device, which improves the anti-corrosion and/or heat preservation of the heat storage device, which is conducive to improving the safety of the heat storage device, and at the same time It is beneficial to reduce the heat loss of the heat storage device and improve the heat storage efficiency.

As a further improvement of the technical solution of the utility model, the electric direct heating device is an electric boiler or an electric heater, which is easy to use and has high electric heating efficiency.

As a further improvement of the technical solution of the utility model, a heating terminal is provided in the greenhouse, and the heating medium can circulate between the heat storage device and the heating terminal, and between the electric direct heating device and the heating terminal flow. Through the circulating flow of the heating medium between the heat storage device and the heating terminal, and between the electric direct heating device and the heating terminal, the heating medium in the process of heat storage heating and electric direct heating is realized. Recycling is also convenient for free switching between heat storage heating and electric direct heat heating.

As a further improvement of the technical solution of the utility model, the heating terminal is a radiator or a fan coil unit, which is convenient to use and can provide good heating effect in the heating process including convection, radiation and conduction heating.

Description of drawings

Fig. 1 is a schematic structural view of a specific embodiment of the utility model.

Fig. 2 is a schematic diagram of bypass protection of an electric three-way valve in a specific embodiment of the present invention.

In the figure: 1, electric direct heating device; 2(1)/2(2), conveying device; 3, heat storage device; 4, greenhouse; 5(1)/5(2)/5(3), electric three Through valve; 6, heating terminal; 7(1)/7(2)/7(3), temperature sensor.

Detailed ways

Referring to FIG. 1 , in the embodiment given herein, the greenhouse heating system with intelligent switching between direct heating and energy storage includes an electric direct heating device 1 , a heat storage device 3 , a heating detection module and a controller. The electric direct heating device 1 is used to heat the heating medium. In this embodiment, the electric direct heating device 1 adopts an electric boiler or an electric heater or other forms of electric heating equipment. The heating medium is water, which flows from the water supply pipe network to the Electric direct heating device 1. The pipeline where the heating medium flows out of the electric direct heating device 1 is provided with a conveying device 2(1), and is connected to the other two sub-pipes through the electric three-way valve 5(1). These two sub-pipes are respectively connected to the heat storage device 3 and the The heating terminal 6 in the greenhouse 4. By switching the electric three-way valve 5 ( 1 ), the heating medium can not only flow from the electric direct heating device 1 to the heat storage device 3 , but also flow from the electric direct heating device 1 to the heating terminal 6 . A pipeline is provided between the heating terminal 6 and the direct heating device 1 to allow the heating medium to flow back from the heating terminal 6 to the direct heating device 1 , so that water circulation can be formed between the direct heating device 1 and the heating terminal 6 . A circulation pipeline is arranged between the heat storage device 3 and the heating terminal 6, and a conveying device 2 (2) is arranged on the circulation pipeline. The pipeline entering and exiting the heating terminal 6 in the circulation of the electric direct heating device 1 and the heating terminal 6 can merge with the pipeline entering and exiting the heating terminal 6 in the circulation of the heat storage device 3 and the heating terminal 6, for example, the pipeline flowing from the heat storage device 3 to the heating terminal 6 It can be merged with the branch pipe flowing from the electric direct heating device 1 to the heating terminal 6, and the pipe flowing out from the heating terminal 6 can be connected to two branch pipes using the electric three-way valve 5(2), and the two branch pipes respectively flow back to the heat storage The device 3 and the electric direct heating device 1, and when the two sub-pipes are connected, cooperate with the pipeline that flows from the electric direct heating device 1 to the heat storage device 3, so that the heating medium can be connected between the electric direct heating device 1 and the heat storage device. 3 cycle flow between. An electric three-way valve 5 ( 3 ) is additionally provided on the pipeline flowing out from the heating terminal 6 , and a pipeline connecting the electric three-way valve 5 ( 3 ) and the sub-pipeline flowing back to the heat storage device 3 is provided. The heat storage device 3 adopts stainless steel water tank and carbon steel water tank, and the tank body is treated with anticorrosion and heat preservation, such as rock wool, rubber and plastic wool, polyurethane foam or other forms of heat preservation materials. heating medium. The heating terminal 6 adopts radiators or fan coils or other forms of terminal heating equipment, and the conveying devices 2(1), 2(2) include water pumps and soft connections for stable operation of the water pumps, filters, check valves, and on-site pressure gauges And other auxiliary equipment, these can be set by existing technology.

As shown in Figure 2, the above-mentioned electric three-way valves 5(1) to 5(3) have manual valves in each direction as backup, and each two valve directions have corresponding valves and pipes as bypasses for backup Easy maintenance and overhaul.

A set of expansion tank device is installed between the branch pipeline flowing from the heating terminal 6 to the electric direct heating device 1 and the electric direct heating device 1. Generally, the expansion tank is set at the highest point of the system, and expansion pipes and overflow pipes are not allowed to install any valve.

The heating detection module is at least used to detect the temperature in the greenhouse 4. In this embodiment, the heating detection module includes a temperature sensor 7 (1) for detecting the temperature of the sub-pipelines flowing back to the electric direct heating device 1, and for detecting The temperature sensor 7 ( 2 ) for the temperature of the pipeline flowing out of the heat device 1 , the temperature sensor 7 ( 3 ) for detecting the temperature of the heat storage device 3 and the temperature sensor for detecting the temperature in the greenhouse 4 . These temperature sensors are all connected to the controller, and the controller is used to receive temperature detection data and control to turn on the electric direct heating device 1 or the heat storage device 3 . The above-mentioned conveying devices 2(1), 2(2) and electric three-way valves 5(1) to 5(3) etc. are also controlled by the controller connected with the temperature sensor.

The greenhouse heating system works as follows: at the beginning of heating, if the start time of the valley electricity has not been reached, the electric three-way valve 5 (3) cuts to the heat storage device 3, and the conveying device 2 (2) starts to pass through the heat storage device. The circulation between 3 and the heating terminal 6 provides the heat required for heating the greenhouse 4, that is, energy storage heating. When the start time of the valley electricity time is reached, the heating water pump 2 (2) stops automatically, and the electric three-way valves 5 (1), 5 (2), and 5 (3) unify the tangential electric direct heating device 1 and the heating terminal 6 The circulation pipe between them, so that the heating medium is heated by the electric direct heating device 1 and the heating medium is circulated between the electric direct heating device 1 and the heating terminal 6 to perform direct heating greenhouse heating. When it is detected that the temperature of the greenhouse 4 continues to be higher than the set value, the heating water pump 2 (1) automatically stops, and the electric three-way valve 5 (1) cuts to the pipeline between the electric direct heating device 1 and the heat storage device 3, and the electric The three-way valve 5(2) communicates with the two sub-pipes it is connected to form a circulation pipeline between the heat storage device 3 and the heating terminal 6, and the electric three-way valves 5(1) and 5(2) provide heating when they are tangentially in place. The water pump 2 (1) starts automatically, and the heating medium circulates between the electric direct heating device 1 and the heat storage device 3, changing from the electric direct heating to the heat storage device 3 for energy storage, realizing the direct heating and off-peak electricity Heat storage and energy storage are correct, which is convenient for energy storage and heating the next day. When it is detected that the temperature of the greenhouse 4 continues to be lower than the set value, the heating water pump 2 (1) automatically stops, and the electric three-way valves 5 (1), 5 (2), and 5 (3) unify the tangential electric direct heating device 1 Circulation pipeline between heating terminal 6 (off-peak time) or electric three-way valve 5(2), 5(3) and circulation pipeline between tangential heat storage device 3 and heating terminal 6 (off-peak time) , when the three-way valve is tangentially in place, the conveying device 2 (1) starts automatically (in valley power time) or the conveying device 2 (2) automatically starts (in non-valley power time), so that the energy storage is converted into direct heating or storage Can be heated. Through the above working process, the heating operation of the greenhouse 4 is completed.

Since the heating time of the greenhouse 4 is generally at night, the time for direct heating of the greenhouse heating system is relatively long. Since electric direct heat heating uses less electricity than heat storage heating to achieve the same heating effect, the greenhouse heating system can reduce the electricity load for heating the greenhouse 4 . Since the greenhouse heating system no longer relies solely on valley electricity heat storage to heat the greenhouse 4, the heating work undertaken by the heat storage device 3 is reduced, and the volume of the heat storage device 3 can be designed to be smaller, which is beneficial to reduce the heat storage device. 3 heat loss, and its manufacturing and operating costs can be further reduced. The greenhouse heating system can freely switch between electric direct heating and heat storage device 3 energy storage, so that while maintaining the heating effect, both direct heating and valley electricity heat storage can be achieved. And the energy storage of valley electricity is just used for energy storage and heating the next day. And because the heat storage heating ratio of the greenhouse heating system is reduced, it can meet the energy storage heating for the next day without long-term heat storage and energy storage, which further improves the heating efficiency.

The above are only preferred embodiments of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications can also be made without departing from the principles of the present utility model. These improvements and modifications should also be considered It is the protection scope of the utility model.

Claims (6)

1. the greenhouse heating system that directly-heated and accumulation of energy intelligently switch, it is characterised in that：Including electric power directly-heated device, heat-storing device, Heat detection module and controller, and the heat-storing device, which is used to store, utilizes the heating medium after paddy electricity heating, the heating Detection module is at least used to detect canopy temperature, and the controller is for receiving described in temperature detection data and control unlatching Electric power directly-heated device or heat-storing device heat to greenhouse.

2. the greenhouse heating system that directly-heated according to claim 1 and accumulation of energy intelligently switch, it is characterised in that：The electric power Directly-heated device is used for heating medium, and the heating medium after its heating is used to convey to heat-storing device and supply to greenhouse It is warm.

3. the greenhouse heating system that directly-heated according to claim 1 or 2 and accumulation of energy intelligently switch, it is characterised in that：It is described Heat-storing device is provided with anti-corrosion and/or attemperator.

4. the greenhouse heating system that directly-heated according to claim 1 or 2 and accumulation of energy intelligently switch, it is characterised in that：It is described Electric power directly-heated device is electric boiler or electric heater.

5. the greenhouse heating system that directly-heated according to claim 1 or 2 and accumulation of energy intelligently switch, it is characterised in that：Greenhouse Inside be provided with heating terminal, the heating medium can between the heat-storing device and the heating terminal, the electric power it is straight It is circulated between thermal and the heating terminal.

6. the greenhouse heating system that directly-heated according to claim 5 and accumulation of energy intelligently switch, it is characterised in that：The heating Terminal is radiator or fan coil.