CN205902517U - Root heating apparatus - Google Patents

Abstract

The utility model relates to a plant root automatic heating device for greenhouse seedlings, which comprises a cultivation tank, a temperature control water tank, a heat exchanger, and a water temperature sensor. The inlet end of the heat exchanger is connected with a heat source input pipe provided with a flow control valve; The water outlet hole and the return hole at the bottom of the temperature control water tank are respectively connected to the main water supply pipeline and the main water return pipeline. The above control box is electrically connected with the water temperature sensor, flow control valve, and water pump respectively; the controller controls the flow rate of the heat source in the heat exchanger to maintain the temperature control water tank within the set temperature range, and the further main water supply pipeline inputs low-temperature hot water to the The heat conduction tube directly heats the substrate or culture solution in the cultivation tank through the heat conduction tube, so as to achieve the effect of precisely controlling the temperature of the root of the plant.

Description

root warming device

technical field

The utility model belongs to the technical field of greenhouse facilities, in particular to a greenhouse seedbed cultivation tank heating device.

Background technique

Plant roots are more sensitive to temperature requirements than those above the leaf surface. The existing technical solution is to regulate the temperature of plant roots by heating the overall indoor space or directly heating the bottom of the greenhouse seedbed by heating pipes. The public (announcement) number is The patent information of 202310743U announced the popular "heating device at the bottom of the greenhouse seedbed". The device is installed with a heat pipe connected to the heating pipeline on the bracket below the seedling tray, and heats up the space at the bottom of the seedbed through the heat pipe. Control plant root temperature.

Using the above technical solution, when the temperature required by the root is added, the greenhouse is generally too high, and at the same time, the temperature of the root zone of the plant cannot be accurately controlled, and the growth of the plant is easily affected by temperature fluctuations; if the heat dissipation pipe is too close to the bottom of the seedling tray, it can be indirectly controlled by heating the seedbed It is difficult to control the temperature in the cultivation tank and the temperature of the roots, and there are problems such as high temperature burns, and the effect is not ideal.

Utility model content

The utility model aims to provide a root heating device to solve the problem of inaccurate temperature control of plant roots in the existing greenhouse seedbed cultivation. The specific plan is as follows:

The root heating device includes no less than one cultivation tank, and is characterized in that: it also includes a temperature control water tank, the temperature control water tank is provided with a heat exchanger and a water temperature sensor, and the inlet end of the heat exchanger is connected to a heat source input pipe, The outlet end is connected to the heat source return pipe, and the heat source input pipe is provided with a flow control valve; the bottom of the temperature control water tank is provided with a water outlet hole and a return hole, and the water outlet hole and the return hole are respectively connected to the main water supply pipeline and the main water return pipeline , the cultivation tank is provided with at least one heat pipe communicating with the main water supply pipeline and the main return water pipeline; The check valve also includes a control box, and the control box is electrically connected with the water temperature sensor, the flow control valve and the water pump respectively.

Further, at least one electromagnetic water valve is included, and the electromagnetic water valve is arranged on the main water supply line between the heat pipe and the water pump.

Further, each of the cultivation tanks is provided with at least one heat pipe.

Further, the heat pipes are continuously arranged in a U-shape on the bottom surface of the cultivation tank.

Further, hot water is passed into the heat source input pipe.

Further, at least one of the cultivation tanks is provided with a temperature sensor, and the temperature sensor is electrically connected to the control box.

Further, the temperature-controlled water tank is provided with a thermal insulation layer.

The control box detects the temperature of the water body in the temperature-controlled water tank through the water temperature sensor. When the water temperature exceeds the set range, the control box controls the flow control valve on the heat source input pipe to reduce/increase the input of high-temperature hot water in the heat source input pipe to achieve control. The purpose of controlling the temperature of the water body in the temperature water tank. Furthermore, when the water body in the temperature-controlled water tank reaches the set range, the pipeline pump starts to work, and the low-temperature hot water in the temperature-controlled water tank is delivered to the U-shaped heat transfer tube, which can directly act on the substrate or culture solution in the cultivation tank , to achieve the effect of precise control of plant root temperature.

Description of drawings

Fig. 1 is a schematic structural diagram of a root heating device according to an embodiment of the present invention.

detailed description

In order to further illustrate various embodiments, the utility model provides accompanying drawings. These drawings are part of the disclosure content of the present invention, which are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and advantages of the present utility model. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1, the root heating device of this embodiment includes several cultivation tanks and a temperature control water tank 1. A heat exchanger 2 and a water temperature sensor 32 are arranged in the temperature control water tank 1, and the inlet end of the heat exchanger 2 is connected to a heat source. The input pipe 21, the outlet end is connected to the heat source return pipe 22, and the heat source input pipe 21 is provided with a flow control valve 31;

The bottom of the temperature control water tank 1 is provided with a water outlet hole 11 and a return hole 12, the water outlet hole 11 is connected to the main water supply pipeline 41, and the return hole 12 is connected to the main water return pipeline 42; a U-shaped heat conducting pipe 43 is arranged in the cultivation tank 5, The heat pipe 43 is laid continuously on the bottom surface of the cultivation tank 5 and the two ends communicate with the main water supply pipeline 41 and the main water return pipeline 42 respectively;

A water pump 33 is provided at the end of the main water supply pipeline 41 close to the water outlet hole 11, and a check valve 44 is provided at the end of the main water return pipeline 42 close to the return hole 12;

It also includes a control box 3, which is electrically connected with a water temperature sensor 32, a flow control valve 31, a water pump 33 and a solenoid valve 34 in sequence to form a control system.

Combined with Figure 1, its working principle is as follows:

a. Water temperature control in the temperature-controlled water tank 1: the heat source input pipe 21 is fed with high-temperature hot water, and the control box 3 measures the temperature of the water body in the temperature-controlled water tank 1 through the water temperature sensor 32. When the temperature is lower than the set temperature range, then Open the flow control valve 31 to pass the high-temperature hot water into the heat exchanger 2, and the heat exchanger 2 is immersed under the liquid level in the temperature-controlled water tank 1, and the temperature of the water body is raised through heat exchange. When the temperature of the water body gradually increases and approaches the upper limit of the set temperature, the flow of the high-temperature hot water passing through the flow control valve 31 is gradually reduced until it stops completely, so as to keep the temperature of the water body within the set range. The wall surface of the temperature control water tank 1 is provided with a thermal insulation layer, which can further improve device efficiency.

b. Plant root temperature control in the cultivation tank 5: When the temperature of the water body in the temperature control water tank 1 reaches the set range, the control box 3 controls the water pump 33 and the solenoid valve 34 to start, and the low-temperature hot water can be passed into the heat pipe through the main water supply pipeline 41 43, and circulated. The heat pipe 43 can directly act on the substrate or culture solution in the cultivation tank to gradually increase its temperature to the temperature of the water body in the temperature control water tank 1 to achieve the effect of accurately controlling the temperature of the roots of the plants. Simultaneously, a temperature sensor can also be set in the cultivation tank 5 to detect the plant root temperature in real time.

c. This utility model can be used for cooling in high temperature environment: the heat source input pipe 21 does not lead to any heat source, and the temperature control water tank 1 stores cold water, which can directly cool the root of the seedbed, which solves the problem of humidity in the greenhouse caused by traditional wet curtain cooling higher condition.

Although the utility model has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, changes in form and details may be made. Making various changes to the utility model is within the protection scope of the utility model.

Claims (7)

1. Root heating device: including not less than one cultivation tank, characterized in that: also includes A temperature control water tank, the temperature control water tank is provided with a heat exchanger and a water temperature sensor, the inlet end of the heat exchanger is connected to a heat source input pipe, the outlet end is connected to a heat source return pipe, and a flow control valve is arranged on the heat source input pipe; The bottom of the temperature-controlled water tank is provided with a water outlet hole and a return hole, and the water outlet hole and the return hole are respectively connected to the main water supply pipeline and the main water return pipeline. a heat pipe; the end of the main water supply pipeline close to the water outlet hole is provided with a water pump, and the end of the main water return pipeline close to the return hole is provided with a check valve; A control box is also included, and the control box is electrically connected with the water temperature sensor, the flow control valve, and the water pump in sequence. 2. The root warming device according to claim 1, characterized in that it further comprises at least one electromagnetic water valve, and the electromagnetic water valve is arranged on the main water supply road between the heat conduction pipe and the water pump. 3. The root warming device according to claim 1, characterized in that: at least one heat pipe is arranged in each of the cultivation tanks. 4. The root warming device according to claim 3, characterized in that: the heat pipes are continuously arranged in a U-shape on the bottom surface of the cultivation tank. 5. The root warming device according to claim 1, characterized in that hot water flows into the heat source input pipe. 6. The root warming device according to claim 1, characterized in that: at least one of the cultivation tanks is provided with a temperature sensor, and the temperature sensor is electrically connected to the control box. 7. The root warming device according to claim 1, characterized in that: the wall surface of the temperature control water tank is provided with a thermal insulation layer.