CN111034502A

CN111034502A - Greenhouse system

Info

Publication number: CN111034502A
Application number: CN201911308432.8A
Authority: CN
Inventors: 吕昊
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-04-21

Abstract

The application discloses greenhouse system, this greenhouse system includes: a heat storage layer; the structural layer and the upper surface of the heat storage layer form a cavity; and the pipeline network is at least partially positioned in the heat storage layer and comprises a water outlet, the pipeline network is communicated with the cavity so as to exchange gas in the pipeline network and gas in the cavity, the gas in the pipeline network realizes heat exchange with the heat storage layer through the pipe wall of the pipeline network, and when the temperature of the heat storage layer is higher than that of the gas in the pipeline network, water vapor in the pipeline network is condensed into water and is discharged out of the pipeline network through the water outlet. This greenhouse system is through laying the pipe network with the cavity intercommunication in heat storage layer for the air in the cavity can get into in the pipe network, and when heat storage layer's temperature was less than the temperature of the gas in the pipe network, the vapor condensation in the pipe network becomes water, and through outlet discharge pipe network, thereby has reached the purpose of dehumidifying greenhouse inside.

Description

Greenhouse system

Technical Field

The invention relates to the technical field of greenhouse, in particular to a greenhouse system.

Background

A greenhouse, also called a greenhouse, is a structure which is transparent and can be used for heat preservation, and is used for cultivating plants such as flowers, vegetables and the like. Particularly, in the seasons where plants are difficult to grow, out-of-season cultivation can be performed to provide vegetables, melons, fruits and the like which are needed by people, and the economic value of realization is self-evident.

Due to the transpiration of plants, the humidity in the greenhouse is very high, so that high incidence of plant diseases and insect pests is caused, and the growth of the plants is influenced. In the prior art, the greenhouse only realizes the windproof function through the plastic film, the heat loss in the greenhouse is very high, and meanwhile, the interior of the greenhouse is dehumidified through the dehumidifier, so that the dehumidifying efficiency is low, and the energy consumption is too high.

Therefore, it is desired to further improve the greenhouse system, improve the heat preservation and dehumidification efficiency effect of the greenhouse, and reduce the dehumidification energy consumption.

Disclosure of Invention

In view of the above, the present invention provides a greenhouse system, wherein a pipe network communicated with a cavity is laid in a heat storage layer, so that air in the cavity can enter the pipe network, when the temperature of the heat storage layer is lower than the temperature of gas in the pipe network, water vapor in the pipe network is condensed into water, and the water vapor is discharged out of the pipe network through a water discharge port, thereby achieving the purpose of dehumidifying the interior of a greenhouse.

According to the present invention there is provided a greenhouse system comprising: a heat storage layer; the structural layer and the upper surface of the heat storage layer form a cavity; and the pipe network is at least partially positioned in the heat storage layer and comprises a water outlet, wherein the pipe network is communicated with the cavity, so that gas in the pipe network and gas in the cavity are exchanged, the gas in the pipe network passes through the pipe wall of the pipe network and the heat storage layer to realize heat exchange, and when the temperature of the heat storage layer is lower than the temperature of the gas in the pipe network, water vapor in the pipe network is condensed into water and is discharged out of the pipe network through the water outlet.

Preferably, the pipe network has a water collecting end, the water collecting end is the end of the pipe network with the largest vertical distance from the upper surface of the heat storage layer, and after water vapor is condensed into water, the water is collected to the water collecting end along the pipe wall of the pipe network.

Preferably, the method further comprises the following steps: the drainage pipeline is connected with the drainage port; and the drain valve is positioned on the drainage pipeline, wherein the drain port is positioned at the water collecting end.

Preferably, the device further comprises a recovery device connected with the drainage pipeline.

Preferably, the drain port includes a plurality of through holes, wherein, when water vapor is condensed into water, the water permeates into the heat storage layer through the plurality of through holes.

Preferably, the method further comprises the following steps: an air delivery pipeline respectively communicated with the pipeline network and the chamber; the gas transmission pipeline is respectively communicated with the pipeline network and the cavity; and the fan is positioned in the cavity and positioned on the air supply pipeline.

Preferably, the heat storage device further comprises a temperature control device, which is located in the cavity and used for controlling the temperature difference between the gas in the pipeline network and the heat storage layer.

Preferably, the piping network comprises metal piping and/or thermally conductive plastic piping and/or a heat exchanger.

Preferably, the piping network has a plurality of layers, respectively located in different depths of the thermal storage layer.

Preferably, the thermal storage layer comprises soil.

According to the greenhouse system provided by the embodiment of the invention, the pipeline network communicated with the cavity is laid in the heat storage layer, so that gas in the pipeline network and gas in the cavity are subjected to gas exchange, and the gas in the pipeline network is subjected to heat exchange with the heat storage layer through the pipe wall of the pipeline network, so that the heat exchange between the gas in the cavity and the heat storage layer is realized. When the temperature of the heat storage layer is lower than the temperature of gas in the pipeline network, after the gas in the cavity enters the pipeline network, water vapor in the pipeline network can be condensed into water and is discharged out of the pipeline network through the water outlet, and the gas in the pipeline network is dried and then is exchanged into the cavity, so that the aim of dehumidifying the inside of the greenhouse is fulfilled.

Compared with the prior art, the greenhouse system disclosed by the embodiment of the invention not only improves the heat insulation effect of the greenhouse by using the heat storage layer, but also utilizes the pipeline network to condense and dehumidify water vapor in the cavity, replaces the scheme of dehumidifying by using a high-power dehumidifier in the prior art, reduces the energy consumption of the greenhouse system, and further saves the cost.

In addition, the greenhouse system provided by the embodiment of the invention realizes water vapor condensation through the temperature difference between the inside and the outside of the pipeline network, so that the temperature difference between the gas in the pipeline network and the heat storage layer can be directly controlled to control the gas condensation rate and the total amount.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.

Fig. 1a shows a schematic perspective view of a greenhouse system according to a first embodiment of the present invention.

Fig. 1b shows a schematic view of the internal structure of fig. 1 a.

Fig. 1c shows a schematic view of the piping network of fig. 1 b.

Fig. 1d and 1e show schematic views of the piping network structure of fig. 1b instead of the embodiment.

Fig. 2 shows a schematic structural view of a greenhouse system according to a second embodiment of the present invention.

Fig. 3a and 3b show line graphs of the humidity of the chamber of the greenhouse system according to an embodiment of the present invention as a function of time.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Fig. 1a shows a schematic perspective view of a greenhouse system according to a first embodiment of the present invention, and fig. 1b shows a schematic internal view of fig. 1 a.

As shown in fig. 1a and 1b, the greenhouse system according to the first embodiment of the present invention includes: the structure layer 110, the insulating layer 120, the light shielding layer 130, the heat storage layer 141, the fan 150, the recycling device 160, the air supply pipeline 101, the air transmission pipeline 107, the water discharge pipeline 108, the valves 11 to 14, the pipeline network, the ventilation structure 180 and a support frame for fixing the structure layer 110 and the insulating layer 120.

The structural layer 110 and the upper surface 1 of the thermal storage layer 141 form a cavity 1100, and a thermal insulation cavity 1200 is formed between the thermal insulation layer 120 and the structural layer 110. The support frame is covered by the structural layer 110 and the insulating layer 120, and if the structural layer 110 and the insulating layer 120 are both made of flexible materials, the shape of the support frame fixes the shapes of the chamber 1100 and the insulating chamber 1200. The light-shielding layer 130 is partially fixed on the structural layer 110 and movably covers the structural layer 110. In the present embodiment, the material of the structural layer 110 includes a plastic film, a single layer or a multi-layer polycarbonate sheet (PC sheet). The material of the insulating layer 120 includes an insulating material. The light shielding layer 130 is made of a heat insulating material which can be rolled up, such as a heat insulating quilt, a cotton quilt or a down quilt.

The material of the thermal storage layer 141 may be soil, or other similar materials with soil, which can store heat for a long time. In some preferred embodiments, the greenhouse system further includes a heat insulation layer 142 located at the bottom of the heat storage layer 141, or the heat insulation layer 142 is disposed around the heat storage layer 141, so as to prevent the heat storage layer 141 from exchanging heat with the external environment.

The piping network comprises water drains and at least part of the piping network is located in the thermal storage layer 140, the piping network communicating with the chamber 1100. In the present embodiment, the pipe network has 3 layers, and each layer of the pipe network has a plurality of pipes. Specifically, a plurality of first pipelines 104 form a first pipeline network, a plurality of second pipelines 105 form a second pipeline network, and a plurality of third pipelines 106 form a third pipeline network. Valve 11 is located on bypass line 102. Valve 12 is located on bypass line 103. The valve 13 is located in the thermal reservoir and on the air delivery conduit 101.

Preferably, the material of the thermal storage layer 141 is soil, and the distances between the first pipe 104, the second pipe 105 and the third pipe 106 and the upper surface 1 of the thermal storage layer are 40cm-60cm, 80cm-100cm and 120cm-160cm, respectively. In order to reduce the heat conduction between the pipe network and the soil, a thermal insulation layer 142 may be arranged at the bottom of the thermal storage layer 141, for example, the thermal insulation layer 142 is arranged in the soil with the depth of 180cm-250 cm.

However, the present embodiment is not limited thereto, and those skilled in the art may make other settings for the number of layers and the burying depth of the pipe network according to the needs.

The piping network has a water collecting end 171, and the water discharging port of the piping network is located at the water collecting end 171, and the water collecting end 171 is the end (farthest end) of the piping network with the largest vertical distance from the upper surface 1 of the heat storage layer, as shown in fig. 1 c. For clarity, only the third network of pipes of the plurality of third pipes 106 is shown in the thermal storage layer 141 of fig. 1 c. In this embodiment, a plurality of third pipes 106 are connected by communication pipes 106' when laying the piping network. Each of the third tubes 106 and the communication tubes 106' has a horizontal drop at both ends thereof such that the water collecting end 171 is the farthest end of the tube network from the upper surface 1 of the heat storage layer. Wherein the piping network comprises metal pipes and/or thermally conductive plastic pipes and/or heat exchangers.

However, the present embodiment is not limited thereto, and in some alternative embodiments, the first duct 104, the second duct 105, and the third duct 106 may also be in a V-shaped structure. The catchment end 171 is located at the bottom of the V-shaped structure. After condensation, the water vapor flows to the bottom of the V-shaped structure and finally flows through the drain pipe 108 to the collection device 160, as shown in fig. 1 d. Wherein, the bottom of the V-shaped structure of each layer of pipeline network can be communicated through other pipelines.

In other alternative embodiments, the first duct 104, the second duct 105, and the third duct 106 may also have an inverted V-shaped configuration. The water collecting ends 171 are respectively located at both ends of the opening of the inverted V-shaped structure. After condensation, the water vapor can flow rapidly along the air flow to the open ends of the inverted V-shaped structure and finally flow into the collection device 160 through the drainage pipe 108, as shown in fig. 1 e.

In the above two alternative embodiments, the opening angles of the V-shaped and inverted V-shaped structures can be set as required by those skilled in the art.

One end of the gas supply pipe 101 is located at the top or middle of the chamber 1100, and is communicated with the chamber 1100, and the other end is directly communicated with the third pipe 106, and is communicated with the first pipe 104 and the second pipe 105 through the bypass pipe 102 and the bypass pipe 103, respectively. The air outlets of the air transportation pipeline 107 are respectively located at two sides in the chamber 1100 and close to the upper surface 1 of the heat storage layer. The gas transmission pipe 107 is communicated with the first pipe 104, the second pipe 105, the third pipe 106 and the chamber 1100 in sequence. The drain pipe 108 is connected to the drain port, the drain valve 14 is disposed on the drain pipe 108, and the recovery device 160 is connected to the drain pipe 108. The fan 150 is located within the chamber 1100 and on the air delivery conduit 101.

In some other embodiments, a temperature control device may also be provided in the chamber 1100 for controlling the temperature difference between the gas in the piping network and the thermal storage layer 141. The temperature control device can be used for heating gas in a pipeline network by integrating heat sources (electricity, gas, coal, biomass and the like) so as to improve the temperature difference, thereby improving the heat exchange efficiency and increasing the dehumidification effect. The carbon dioxide generated by the combustion warming may provide nutrients to the crops within the chamber 1100, thereby increasing the yield of the crops.

The venting structure 180 communicates the chamber 1100 with the environment outside the chamber for exchanging gases outside the chamber with the chamber 1100. In some embodiments, the ventilation structure 180 may be a heat exchanger, located within the insulated chamber 1200, and may be mounted on the top or on both sides of the structural layer 110. The heat exchanger needs to pass through the structural layer 110 and the insulating layer 120, wherein the number of the heat exchangers can be set as required.

The working principle of the greenhouse system according to the first embodiment of the present invention will be described in detail with reference to fig. 3a and 3 b.

When the temperature outside the greenhouse system is high, the temperature of the gas inside the thermal insulation chamber 1200 and the chamber 1100 is increased. At this time, the valve 11 is opened, the

valves

12 and 13 are closed, and the blower 150 is started. Gas inside the chamber 1100 enters the first conduit 104 through the gas feed conduit 101 and the bypass conduit 102. The gas sent into the first pipeline 104 exchanges heat with the heat storage layer 141 through the pipe wall of the pipeline network, and the heat is dissipated into the heat storage layer 141. The gas inside the first duct 104 continues to return to the chamber 1100 via the gas duct 107 under the action of the fan 141. A large amount of heat is stored in the thermal storage layer 141 through many cycles.

Meanwhile, when the temperature of the thermal storage layer 141 is lower than the temperature of the gas in the first pipe 104, the water vapor in the first pipe 104 is condensed into water, and the water is collected to the water collecting end 171 along the pipe wall of the first pipe 104. The drain valve 14 is opened, and the collected water is collectively discharged from the first pipe 104 and sent to the drain pipe 108. Eventually, the collected water enters the collection device 160. The water in the collection device 160 may be reused, such as irrigating plants, etc.

While the above embodiment has been described with the chamber 1100 communicating with the first piping network 104 via the valve 11, in some other embodiments, the thermal energy may be supplied to the lower, middle and upper soil layers in turn by controlling the opening and closing of a plurality of valves. When the temperature in the chamber 1100 is too high, the total amount and the speed of the gas in the chamber 1100 entering the pipe network can be increased by the fan 141, so that the three layers of pipe networks simultaneously supply heat to the heat storage layer 141, and the heat absorption efficiency of the soil is increased.

When the temperature outside the greenhouse system is low, the temperature of the heat preservation cavity 1200 and the gas inside the cavity 1100 drops, and the heat in the heat storage layer 141 is dissipated to the first pipeline 104 through the pipe wall of the pipeline network to exchange heat with the gas in the first pipeline 104. The blower 141 is started, the gas inside the chamber 1100 enters the first pipe 104 through the gas feeding pipe 101 and the bypass pipe 102, and the gas inside the first pipe network 104 continues to return to the chamber 1100 through the gas conveying pipe 108 under the action of the blower 141. After many cycles, a large amount of heat stored in the thermal storage layer 141 enters the chamber 1100, and temperature variation in the chamber 1100 is controlled within a small range.

The above embodiments have only illustrated the case where the chamber 1100 is in communication with the first piping network 104 via the valve 11. Correspondingly, the opening and closing of the valves can be controlled according to the outdoor temperature, the rotating speed of the fan 141 is controlled, the total amount and the speed of gas in the pipeline network entering the cavity 1100 are increased, the three pipeline networks supply heat at the same time, and the heat release efficiency of soil is increased.

As shown in fig. 2, a greenhouse system according to a second embodiment of the present invention comprises: the structure layer 210, the insulating layer 220, the light shielding layer 230, the heat storage layer 241, the fan 250, the air supply pipeline 201, the air supply pipeline 207, the valve, the pipeline network, the ventilation structure and the support frame for fixing the structure layer 210 and the insulating layer 220. The structure of the greenhouse system according to the second embodiment of the present invention is similar to that of the first embodiment, and will not be described herein again. The difference from the first embodiment is that the pipe wall of the pipe network of the present embodiment is provided with a plurality of through holes 20, the water outlet of the pipe network comprises a plurality of through holes 20, and after the water vapor is condensed into water, the water permeates into the heat storage layer 241 through the plurality of through holes 20, and does not need to enter the recovery device through the water drainage pipe.

Fig. 3a and 3b show line graphs of the humidity of the chamber of the greenhouse system according to an embodiment of the present invention as a function of time. Wherein the abscissa of fig. 3a and 3b is the measurement time and the ordinate is the relative humidity in the chamber.

Fig. 3a shows data measured in a weather where the air temperature changes gently. As shown in fig. 3a, the fan is turned on at the time when the illumination intensity gradually increases and the air temperature gradually rises (for example, between 8 and 15 points), so that the air in the chamber enters the pipe network for circulation, and after 1 hour interval, the relative humidity of the air in the chamber is reduced from 75% to below 50% (corresponding to time t1 and time t2, respectively). After the fan is turned off, the relative humidity in the cavity also rises due to the transpiration of the plants, and after the time t3 is reached, the relative humidity in the cavity tends to be stable.

Fig. 3b shows data measured in a weather in which the air temperature changes drastically. As shown in fig. 3b, the fan is turned on when the illumination intensity gradually increases and the air temperature gradually rises, so that the air in the chamber enters the pipeline network for circulation, and after 1 hour interval, the relative humidity of the air in the chamber is reduced from 75% to about 50% (corresponding to the time t1 and the time t3, respectively). During this time, the change in the relative humidity at the time t2 to t3 is not monotonically decreasing due to a drastic change in the outdoor air temperature. After the fan is turned off, the relative humidity in the cavity also rises due to the transpiration of the plants, and after the time t4 is reached, the relative humidity in the cavity tends to be stable. Through multiple measurements, the greenhouse system provided by the embodiment of the invention is verified to reduce the air humidity by about 20% within 1 hour, and even more.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A greenhouse system, comprising:

a heat storage layer;

the structural layer and the upper surface of the heat storage layer form a cavity; and

a piping network located at least partially in the thermal reservoir, the piping network comprising a water discharge opening,

wherein the pipe network is communicated with the cavity so as to exchange gas between the gas in the pipe network and the gas in the cavity, the gas in the pipe network realizes heat exchange with the heat storage layer through the pipe wall of the pipe network,

when the temperature of the heat storage layer is lower than the temperature of the gas in the pipeline network, the water vapor in the pipeline network is condensed into water and is discharged out of the pipeline network through the water outlet.

2. The greenhouse system of claim 1, wherein the piping network has a water collection end, the water collection end being an end of the piping network that is at a maximum vertical distance from an upper surface of the thermal storage layer,

after the water vapor is condensed into water, the water is collected to the water collecting end along the pipe wall of the pipe network.

3. The greenhouse system of claim 2, further comprising:

the drainage pipeline is connected with the drainage port; and

a drain valve positioned on the drainage pipeline,

wherein the water outlet is located at the water collecting end.

4. Greenhouse system according to claim 3, further comprising a recovery device connected to the drainage pipeline.

5. The greenhouse system of claim 1, wherein the drain opening comprises a plurality of through holes,

when the water vapor is condensed into water, the water permeates into the heat storage layer through the through holes.

6. The greenhouse system of any one of claims 1-5, further comprising:

an air delivery pipeline respectively communicated with the pipeline network and the chamber;

the gas transmission pipeline is respectively communicated with the pipeline network and the cavity; and

and the fan is positioned in the cavity and on the air supply pipeline.

7. The greenhouse system of claim 6, further comprising a temperature control device located within the chamber for controlling the temperature differential between the gas within the network of pipes and the thermal storage layer.

8. Greenhouse system according to any one of claims 1-5, wherein the network of pipes comprises metal pipes and/or thermally conductive plastic pipes and/or heat exchangers.

9. Greenhouse system according to one of claims 1 to 5, wherein the network of pipes has a plurality of layers, each located in a different depth of the thermal storage layer.

10. Greenhouse system according to any one of claims 1-5, wherein the thermal storage layer comprises soil.