CN205139743U - Vegetation room temperature control system - Google Patents

Abstract

The utility model relates to the technical field of air temperature and water temperature control in a plant growth room, and specifically discloses a temperature control system for a plant growth room, including a refrigeration unit, an electric boiler, an irrigation pool and a fan, and both the irrigation pool and the fan are equipped with a temperature-regulating circulation pipeline The refrigerating unit or electric heating boiler is connected with the circulating pipeline of the fan through the water inlet pipe and the return pipe, and the water inlet pipe is connected with the water inlet of the circulating pipeline of the fan through the electro-hydraulic proportional valve; the refrigerating unit and the electric heating boiler are respectively connected through their respective water inlet pipes and The return pipe is connected with the circulation pipeline of the irrigation pool, and the water inlet pipes of the refrigeration unit and the electric heating boiler are connected with the water inlet of the circulation pipeline of the irrigation pool through the electro-hydraulic proportional valve; the refrigeration unit is connected with the circulation pipeline of the fan through the water inlet pipe and the return pipe. When connected, a low-temperature refrigerant circulating water tank and a low-temperature refrigerant circulating pump are arranged between the return water pipe and the return water port of the refrigerating unit. The utility model can precisely control the air temperature and water temperature in the plant growth room for a long time, and the temperature fluctuation range is small.

Description

Plant growth room temperature control system

technical field

The utility model relates to the technical field of plant growth rooms, in particular to the technical field of air temperature and water temperature control in the plant growth room.

Background technique

Plant indoor planting cultivation and growth technology, especially soilless cultivation technology is an important technology often used in modern agricultural production. It is widely used. It can shorten the plant growth time, improve the efficiency of fertilization, and the obtained agricultural products are of high quality and pollution-free. Among them, the air temperature in the plant growth room and the temperature of irrigation water generally need to be regulated within a certain range to ensure the needs of plant growth.

However, the air temperature in the plant growth room and the temperature of irrigation water in the prior art are adjusted and controlled with low accuracy, which cannot meet the temperature control requirements of the plant growth room that requires long-term precise temperature control, and the temperature fluctuates greatly, which affects the growth of plants.

Utility model content

The technical problem to be solved by the utility model is to provide a plant growth room temperature control system, which can accurately control the air temperature and water temperature in the plant growth room for a long time, and the temperature fluctuation range is small, so as to meet the constant temperature of different periods of plant growth in the growth room Require.

In order to solve the above technical problems, the technical solution adopted by the utility model is: the temperature control system of the plant growth room, including a refrigeration unit, an electric boiler, an irrigation pool and a fan, and the irrigation pool and the fan are equipped with a temperature-regulating circulation pipe The refrigerating unit or the electric heating boiler communicates with the circulation pipeline of the fan through the water inlet pipe and the return pipe, and the water inlet pipe communicates with the water inlet of the circulation pipeline of the fan through the electro-hydraulic proportional valve; the refrigerating unit and the electric heating boiler respectively It communicates with the circulation pipeline of the irrigation pool through its respective water inlet pipe and return pipe, and the water inlet pipes of the refrigeration unit and the electric heating boiler are connected with the water inlet of the circulation pipeline of the irrigation pool through the electro-hydraulic proportional valve; the refrigeration unit passes through When the water inlet pipe and the return pipe are connected with the circulation pipeline of the fan, a low-temperature refrigerant circulating water tank and a low-temperature refrigerant circulating pump are arranged between the return water pipe and the return water port of the refrigeration unit, and the low-temperature refrigerant circulating pump can transfer the low-temperature refrigerant circulating water tank The cold water in the refrigeration unit is pumped into the refrigeration unit through the cold water return port of the refrigeration unit.

Further, the refrigerating unit and the electric heating boiler are connected to the circulation pipeline of the fan through their respective water inlet pipes and return pipes, and the water inlet pipes of the refrigerating unit and the electric heating boiler are connected to the circulation pipe of the fan through the electro-hydraulic proportional valve. The road water inlet is connected.

Further, when the refrigerating unit communicates with the circulation pipeline of the fan through its water inlet pipe and return pipe, the water inlet pipe is provided with a liquid supply regulating station, and the liquid supply regulating station includes a liquid supply pipeline diverter, a pressure meter and throttle valve, the water supply pipe divider divides the water inlet pipe into several water inlet pipe branches, and the water inlet pipe branches are equipped with pressure gauges and throttle valves, and the water inlet pipe branches are respectively passed through the electro-hydraulic proportional The valve is in communication with the water inlet of the circulation pipeline of the fan and the water inlet of the circulation pipeline of the irrigation pool; the return pipe is provided with a liquid return regulating station, including a liquid return line diverter, a pressure gauge and a throttle valve. The liquid pipeline divider divides the return pipe into several return pipe branches. Pressure gauges and throttle valves are arranged on the return pipe branches. The pipe return port is connected.

Further, it also includes a PLC controller and a temperature sensor, the electro-hydraulic proportional valve and the temperature sensor are electrically connected to the PLC controller; the temperature sensor includes at least two, respectively measuring the water temperature in the irrigation pool and the air temperature in the plant growth room , and transmit the measurement signal to the PLC controller, and the flow rate of the electro-hydraulic proportional valve is controlled by the PLC controller.

Further, a ventilation duct is provided in the plant growth room, and the fan communicates with the ventilation duct.

The ventilation ducts include ventilation pipes and air outlet pipes. A pair of parallel walls in the plant growth room are provided with ventilation pipes parallel to the walls. The ventilation pipes lead downward at equal intervals to a plurality of air outlet pipes. The mouth is close to the ground in the plant growth room, and the side wall of the air outlet pipe is provided with a plurality of holes from top to bottom along the pipe direction.

The beneficial effects produced by adopting the above-mentioned technical scheme are:

1) The utility model uses an electro-hydraulic proportional valve to precisely control the air temperature and water temperature in the plant growth room for a long time, and the temperature fluctuation range is small, which meets the constant temperature requirements of different periods of plant growth in the growth room.

2) In this utility model, a low-temperature refrigerant circulating water tank is installed in front of the refrigeration unit. After the refrigeration unit refrigerates and cools the circulating cold water once, a certain amount of cold water is stored in the low-temperature refrigerant circulating water tank for continuous cooling of the cold water backwater. The cooling of the cold water is gentle and can greatly Reduce the start-up refrigeration frequency of the refrigeration unit, reduce the loss of the refrigeration unit, prolong the service life of the refrigeration unit, achieve energy saving effects, and reduce refrigeration costs.

Description of drawings

Fig. 1 is the pipeline connection schematic diagram of an embodiment of the utility model;

Fig. 2 is the pipeline connection schematic diagram of another embodiment of the utility model;

Fig. 3 is the top view of the utility model plant ventilation duct in the growth room;

Fig. 4 is a schematic structural view of the air outlet duct in the plant growth room.

Among them, 1. Refrigeration unit; 2. Low-temperature refrigerant circulating pump; 3. Low-temperature refrigerant circulating water tank; 4. Electric boiler; 5. Liquid supply adjustment station; 6. Liquid return adjustment station; 7. Irrigation pool; 8. Fan; 9 , Electro-hydraulic proportional valve; 10, ventilation pipe; 11, air outlet pipe.

detailed description

In order to describe the utility model more clearly, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The temperature control system of the plant growth room, as shown in Figure 1, includes a refrigeration unit 1, an electric boiler 4, an irrigation pool 7, and a fan 8. Both the irrigation pool 7 and the fan 8 are equipped with a temperature-regulating circulation pipeline, and the refrigeration unit 1 passes through the cold water pipe. and the cold water return pipe are connected with the circulation pipeline of the irrigation pool 7 and the fan 8 respectively; The proportional valve 9 is connected to the water inlet of the circulation pipeline of the irrigation pool 7, and the cold water pipe is connected to the water inlet of the circulation pipeline of the fan 8 through the electro-hydraulic proportional valve 9; The circulating water tank 3 and the low-temperature refrigerant circulating pump 2 , the low-temperature refrigerant circulating pump 2 can pump the cold water in the low-temperature refrigerant circulating water tank 3 into the refrigeration unit 1 through the cold water return port of the refrigeration unit 1 .

Among them, the cold water pipe is provided with a liquid supply regulating station 5, the liquid supply regulating station 5 includes a liquid supply pipeline diverter, a pressure gauge and a throttle valve, and the liquid supply pipeline divider divides the cold water pipe into two cold water pipe branches, There are pressure gauges and throttle valves on the cold water pipe branches, and the two cold water pipe branches are respectively connected with the water inlet of the circulation pipeline of the fan 8 and the water inlet of the circulation pipeline of the irrigation pool 7 through the electro-hydraulic proportional valve 9; the cold water return pipe There is a liquid return regulating station 6 on the top, including a liquid return pipeline diverter, a pressure gauge and a throttle valve. The liquid return pipeline divider divides the cold water return pipe into two cold water return pipe branches, and the cold water return pipe branch road is provided with A pressure gauge, a throttle valve, and two branches of cold water return pipes are respectively connected with the return water outlet of the circulation pipeline of the fan 8 and the water return opening of the circulation pipeline of the irrigation pool 7 .

Electro-hydraulic proportional valve 9 is called proportional valve for short. Ordinary hydraulic valves can only perform fixed value control on the pressure and flow of liquid flow through pre-adjustment. However, when the equipment mechanism requires adjustment or continuous control of the pressure and flow parameters of the hydraulic system during the working process, ordinary hydraulic valves cannot achieve it. The electro-hydraulic proportional valve 9 is a valve that continuously and proportionally controls the flow direction, flow and pressure of the hydraulic system according to the input electrical signal. It is composed of two parts: the electric-mechanical proportional conversion device and the hydraulic control valve body. The former converts the input electrical signal into mechanical force and displacement output continuously and proportionally. The latter receives the mechanical force and displacement, presses Proportional continuous output pressure and flow. By continuously adjusting the flow rate of the electro-hydraulic proportional valve 9, the temperature and water temperature in the plant growth room can be precisely controlled for a long time, and the temperature fluctuation range is small, which meets the constant temperature requirements for plant growth in the growth room.

When the temperature control system of the plant growth room is working, the refrigeration unit 1 circulates and refrigerates the water in the cold water circulation pipeline. When the cold water drops to the rated low temperature, the refrigeration unit 1 stops working, and there is a certain amount of low-temperature water in the low-temperature refrigerant circulating water tank 3 Mix with cold water and return water to cool down, and then the low-temperature refrigerant circulating pump 2 pumps the water in the low-temperature refrigerant circulating water tank 3 into the refrigeration unit 1 to realize the cold water circulation. After a long cycle, when the cold water rises to the rated high temperature, the refrigeration unit 1 starts Work, the water in the cold water circulation pipeline is refrigerated again, the cold water is reduced to the rated low temperature, and the refrigerating unit 1 stops working. The low-temperature refrigerant circulating water tank 3 can greatly reduce the start-up cooling frequency of the refrigeration unit 1, prolong the service life of the refrigeration unit 1, prolong the circulation period of cold water, save energy and reduce consumption, and reduce refrigeration costs. After the refrigeration unit 1 refrigerates and cools the circulating cold water once, a certain amount of cold water is stored in the low-temperature refrigerant circulating water tank 3 for continuous cooling of the cold water backwater. The cooling of the cold water is gentle and easy to adjust.

The embodiment in Fig. 1 of the utility model is suitable for high temperature seasons, such as summer, the fan 8 cools down the plant growth room to maintain a lower constant temperature. Similarly, the blower fan 8 of the embodiment in Fig. 1 is disconnected from the refrigerating unit 1, and the hot water circulation is realized with the electric boiler 4, which is suitable for low-temperature seasons, such as in winter, the blower fan 8 heats the plant growth room to maintain Higher constant temperature.

As a further improvement to this technical solution, the electric boiler 4 communicates with the circulation pipeline of the fan 8 through the hot water pipe and the hot water return pipe, and the hot water pipe communicates with the water inlet of the circulation pipeline of the fan 8 through the electro-hydraulic proportional valve 9, as shown in the figure 2. The fan 8 is connected with the refrigeration unit 1 and the electric heating boiler 4 at the same time. By adjusting the electro-hydraulic proportional valve 9, the temperature in the growth room can be adjusted more flexibly. The temperature can be adjusted in a wide range and the applicability is better.

As a further improvement to the technical solution, the plant growth room temperature control system also includes a PLC controller and a temperature sensor, the electro-hydraulic proportional valve 9, and the temperature sensor are all electrically connected to the PLC controller; the temperature sensor includes at least two, respectively measuring the irrigation pool 7 The internal water temperature and the air temperature in the plant growth room, and the measurement signal is transmitted to the PLC controller, and the flow rate of the electro-hydraulic proportional valve 9 is controlled by the PLC controller. The PLC controller is used to set the required temperature of the plant growth room, and the PLC controller automatically adjusts the electro-hydraulic proportional valve 9 in real time through the temperature monitored by the temperature sensor to realize the continuous adjustment of the temperature. Practice has proved that the temperature error can be controlled within 0.5°C.

As a further improvement to the technical solution, a ventilation duct is provided in the plant growth room, and the fan 8 communicates with the ventilation duct. See Fig. 3 and Fig. 4, the fan 8 is fixed on the wall on the top side of the plant growth room, and the walls on both adjacent sides are provided with ventilation pipes 10 parallel to the wall, and the ventilation pipes 10 lead downwards at equal intervals. The air duct 11, the nozzle of the air outlet duct 11 is close to the ground in the plant growth room, and the side wall of the air outlet duct 11 has a plurality of holes along the pipe direction from top to bottom. The ventilation pipe 10 is preferably a hard PVC pipe, and the air outlet pipe 11 is preferably formed by crimping a polyethylene film. The ventilation duct makes the wind power of the fan 8 evenly distributed in the growth room, so that the temperature in the growth room is consistent from top to bottom.

Claims (6)

1. The temperature control system of the plant growth room, including the refrigeration unit (1), the electric boiler (4), the irrigation pool (7) and the fan (8). Warm circulation pipeline, characterized in that the refrigerating unit (1) or the electric boiler (4) communicates with the circulation pipeline of the fan (8) through the water inlet pipe and the return pipe, and the water inlet pipe passes through the electro-hydraulic proportional valve ( 9) It is connected with the water inlet of the circulation pipeline of the fan (8); the refrigeration unit (1) and the electric boiler (4) are respectively connected with the circulation pipeline of the irrigation pool (7) through their respective water inlet pipes and return pipes, The water inlet pipes of the refrigeration unit (1) and the electric heating boiler (4) are connected to the water inlet of the circulation pipeline of the irrigation pool (7) through the electro-hydraulic proportional valve (9); When the return pipe is in communication with the circulation pipeline of the fan (8), a low-temperature refrigerant circulation tank (3) and a low-temperature refrigerant circulation pump (2) are provided between the return pipe and the return port of the refrigerating unit (1), and the low-temperature refrigerant circulation pump (2) is provided. The refrigerant circulation pump (2) can pump the cold water in the low-temperature refrigerant circulation water tank (3) into the refrigeration unit (1) through the cold water return port of the refrigeration unit (1). 2. The plant growth room temperature control system according to claim 1, characterized in that, the refrigerating unit (1) and the electric heating boiler (4) are connected to the fan (8) through their respective water inlet pipes and return pipes respectively. The circulation pipeline is connected, and the water inlet pipes of the refrigerating unit (1) and the electric heating boiler (4) are connected with the water inlet of the circulation pipeline of the fan (8) through the electro-hydraulic proportional valve (9). 3. The plant growth room temperature control system according to claim 1, characterized in that, when the refrigeration unit (1) communicates with the circulation pipeline of the fan (8) through its water inlet pipe and return pipe, the water inlet pipe A liquid supply regulating station (5) is provided on the top, and the liquid supply regulating station (5) includes a liquid supply pipeline diverter, a pressure gauge and a throttle valve, and the liquid supply pipeline divider divides the water inlet pipe into several water inlet pipes branch, the water inlet branch is provided with a pressure gauge and a throttle valve, and the water inlet branch passes through the electro-hydraulic proportional valve (9) and the circulation pipe inlet of the fan (8) and the irrigation pool (7) The water inlet of the circulating pipeline is connected; the return pipe is provided with a liquid return regulating station (6), including a liquid return line diverter, a pressure gauge and a throttle valve, and the return liquid line diverter divides the return water pipe into A number of return pipe branches, on which pressure gauges and throttle valves are arranged, and the return pipe branches are respectively connected to the return outlet of the circulation pipeline of the fan (8) and the circulation pipeline return of the irrigation pool (7). The water port is connected. 4. The plant growth room temperature control system according to claim 2, characterized in that it also includes a PLC controller and a temperature sensor, and the electro-hydraulic proportional valve (9) and the temperature sensor are both electrically connected to the PLC controller; The temperature sensor includes at least two, which respectively measure the water temperature in the irrigation pool (7) and the air temperature in the plant growth room, and transmit the measurement signal to the PLC controller, and the electro-hydraulic proportional valve (9) is controlled by the PLC controller Traffic size. 5. The temperature control system for a plant growth room according to claim 1, characterized in that a ventilation duct is provided in the plant growth room, and the fan (8) communicates with the ventilation duct. 6. The plant growth room temperature control system according to claim 5, characterized in that, the ventilation duct includes a ventilation pipe (10) and an air outlet pipe (11), and a pair of parallel walls in the plant growth room are provided with There are ventilation pipes (10) parallel to the walls, and the ventilation pipes (10) lead downwards at equal intervals to a plurality of air outlet pipes (11). The nozzles of the air outlet pipes (11) are close to the ground in the plant growth room. 11) The side wall has a plurality of holes along the pipe direction from top to bottom.