CN214628475U - Greenhouse low-temperature distributed composite end device - Google Patents

Abstract

A low-temperature distributed composite terminal device of a greenhouse belongs to the technical field of agricultural greenhouses and building energy conservation. In view of the current situation that an indoor heat supply end usually adopts a high-temperature end form matched with high-temperature water supply of a boiler, high-pollution heat sources such as a coal-fired boiler are gradually replaced by clean heat sources such as a ground source heat pump and solar energy, but the high-temperature end cannot be normally used, the conventional low-temperature end is difficult to arrange in a large space, and the like, the low-temperature type distributed composite end form is adopted, a low-temperature tube bundle heat exchanger under a seedbed, a vertical crop support tube bundle heat exchanger, a floor radiation heating coil, a wet curtain air processor, an embedded pipe type low-temperature end and the like are added, the heating water supply temperature can be reduced to 30-45 ℃ or lower, the low-temperature composite end form is conveniently matched with a clean heat source composed of low-grade new energy and a heat pump unit, and the high-efficiency and low-energy consumption operation is realized while the heat supply and the cold supply are realized.

Description

Greenhouse low-temperature distributed composite end device

Technical Field

The utility model relates to a compound end device of warmhouse booth low temperature type distributing type belongs to agricultural greenhouse and building energy saving technical field.

Background

The greenhouse is an important infrastructure and an efficient production form in the field of agricultural production, particularly the production of economic crops such as vegetables, fruits, flowers, medicines and the like, wherein a large number of passive solar plastic greenhouses are adopted in China, and high-end glass greenhouses are introduced in recent years, wherein the production period of the glass greenhouses in the countries of the northern Europe, the Netherlands and the like can reach 11 months every year, and the yield per mu is extremely high. Taking tomato production as an example, the per mu yield of tomatoes depends on the variety and cultivation facilities planted. According to the growth classification, the method is generally divided into a self-capping type and an infinite growth type; the cultivation includes open-air cultivation and greenhouse cultivation. The general per mu yield of the self-capping open cultivation is as follows: 3000 plus 4000 kilograms (equivalent to 4.5-6.0 kg/square meter); the general per mu yield of self-capping greenhouse cultivation is as follows: 5000 and 7000 kilograms; the general yield per mu of the infinite growth type open cultivation is as follows: 4000-; the infinite growth type greenhouse cultivation generally has the following yield per mu: 10000-plus 12000 kilograms (amounting to 15-18 kg/square meter). The highest yield of the glass greenhouse in the Netherlands can reach 60 kg/square meter (the yield per mu in a production area is 40000kg), which is 10.0-13.3 times that of the traditional open-air cultivation and 3.3-4.0 times that of the conventional infinite growth type greenhouse cultivation. Therefore, reasonable production facilities and technical processes are adopted, the agricultural production efficiency can be greatly improved, and an intensive agricultural production mode is realized.

The technical conditions and requirements of different crops and the growth process thereof on the environment are different, for example, the air parameter requirements of the common edible big tomatoes are as follows: a crop growth layer-0.6 m to 3.3 m above the ground; summer: (the outside temperature is 20 ℃ lowest at night to 42 ℃ highest at daytime); the temperature of a crop growth layer is lower than 35 ℃ in the daytime and lower than 25 ℃ at night; in winter: (lowest-14 ℃ in the outside nighttime); the temperature of a crop growth layer is not lower than 25 ℃ in daytime and not lower than 15 ℃ at night; the humidity requirement is as follows: 45-50% (more than 55% is easy to cause diseases). The control requirements of the parameters of the glass greenhouse for planting flowers are as follows: in the orchid seedling culture area, the indoor design temperature is required to be 28-31 ℃ throughout the year, but not lower than 28 ℃, otherwise, the growth, the plant form and even the failure of orchid seedlings are seriously influenced; the design temperature of the orchid blooming area and the flower forcing area is less than 25 ℃ in the daytime in summer and 18 ℃ in 14 hours at night. In a word, the control precision of parameters required by the growth of the orchid is high, and the orchid needs to be guaranteed all the year round.

Taking a glass greenhouse with higher production efficiency as an example, although the production efficiency is very high, the proportion adopted in the production of the domestic greenhouse is very low (about 1 percent), and the following outstanding problems exist at present.

(1) If the energy consumption is too large, if indoor temperature and humidity parameters are controlled according to the higher growth efficiency of crops, the energy cost accounts for about 60 percent of the total operation cost; and the initial investment of the glass greenhouse is higher, so the investment recovery period is overlong, and the economic benefit is not obvious.

(2) The production operation time after the technology is introduced in China is only about half a year, and cannot reach 11 months in the Netherlands, the yield is reduced by about half, and the product income is greatly reduced.

(3) In order to control energy cost, the room temperature is lower in severe cold period in winter and too high in summer, so that crops cannot grow normally, for example, the actual measured temperature in summer possibly reaches 50-60 ℃ in daytime, which is one of the main reasons that the production time of the domestic glass greenhouse is far less than 11 months, and the environmental temperature in northern Europe countries such as the Netherlands is relatively lower, and the condition of summer overheating rarely occurs.

(4) With the increasing attention on environmental protection, the relatively cheap heat supply methods such as coal-fired boilers are subject to reduction or even banning, and the alternative gas-fired boilers have higher energy cost, so that the economic benefit is worse.

On the other hand, the building energy-saving technology and the clean heat supply mode are rapidly developed in recent years, wherein the university of Qinghua building environment and equipment institute Lizhong professor team creates, and carries out combined engineering technology development and industrialization with Beijing Qingda astronomical energy technology institute, Beijing enlightening astronomical heat energy technology limited company and the like, and the related large-space air parameter distribution and personalized cold supply and heat supply technical method, wherein the indoor heat and cold supply terminal adopts a flexible distributed terminal mode, and can carry out personalized control on the large-space air temperature and humidity parameters, so that the overall energy consumption and the operation cost are effectively reduced while local control parameters are realized, the water supply temperature can be reduced to the maximum extent during heat supply operation, and the heat source heating efficiency is improved; when in cold supply operation, the water supply temperature of the cold source can be increased, even underground water is directly used for cold supply, and manual refrigeration is not needed to be started or is seldom started.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an aim at and task are, to the main problem that aforementioned green house exists, combine green house actual technical condition and production operation demand, designed the low temperature type distributing type load end device who is applicable to natural energy and low temperature heat source equipment, can reduce indoor heating water supply temperature by a wide margin, improve heat source efficiency, reduce energy cost.

The utility model discloses a concrete description is: the greenhouse low-temperature distributed composite end device is characterized by comprising a ground heating pipe 6, a middle heating pipe 6a (without a high-rise heating pipe 6b), a cooling and heating fan 5 and a wet curtain 8, as well as a low-temperature tube bundle heat exchanger 9, a crop vertical support tube bundle heat exchanger 11, a floor radiation heating coil pipe 10, a wet curtain air processor 12 and a pipe-embedded low-temperature end 13.

The greenhouse low-temperature type distributed composite tail end device formed by the heat and cold supply tail end devices has the following structure and position relationship.

The low-temperature tube bundle heat exchanger 9 is arranged in the lower space of the plant seedbed 7 in the production area, the heat exchange element 9a is a plastic tube, a steel fin or a copper tube aluminum fin tube structure, and the bottom of the low-temperature tube bundle heat exchanger is provided with a condensed water receiving tray 9b which falls to the ground.

The crop vertical support tube bundle heat exchanger 11 is vertically arranged at the upper part of the plant seedbed 7 of the production area, is positioned in the middle of plant stems and leaves, and is used as a fence or a support for supporting the growth of plants, at the moment, the support type heat exchange element 11a is of a plastic tube or metal tube structure, and the temperature of water flowing in the tube does not exceed the allowable temperature range of the growth of the plants; or arranged along the inner wall of the outer wall, and the bracket type heat exchange element 11a is a plastic pipe, a steel fin or a copper pipe aluminum fin pipe structure.

The radiant floor heating coil 10 is buried under the ground and has a plastic pipe structure.

The wet curtain air handler 12 is a box type structure combining a wet curtain, a surface cooler, a fan, a case, an indoor return air pipe and an outdoor air inlet pipe, and is communicated with low-temperature heat source water or cooling water, indoor return air and outdoor fresh air.

The embedded pipe type low-temperature tail end 13 is of a capillary plastic pipe structure, a plastic pipe structure or a metal light pipe structure and is communicated with low-temperature heat source water or cooling water.

The utility model discloses it is very big because of the poor heat supply cooling load that leads to of envelope thermal-insulated effect to current situation warmhouse booth, the terminal problem that needs supporting high-temperature water heat supply heat source of indoor heat supply, for adopting the clean heat supply heat source mode based on natural energy intelligence accuse temperature, the low temperature type distributed load end device who is applicable to the big space has been designed, can reduce heat source water supply temperature by a wide margin, improve heat source efficiency, its heating water supply temperature can reduce to 30 ~ 45 ℃ or lower, be convenient for with ground water source heat energy, solar energy, air energy, clean heat source systems such as heat pump set are supporting, in order to reach the most probably natural energy cooling heat supply of utilizing, realize the high-efficient operation of heat source system, reduce artifical energy and expense.

Drawings

Fig. 1 is a schematic view of the conventional high temperature heat supply end form of the agricultural greenhouse of the present invention, and fig. 2 is a schematic view of the end form of the present invention.

The numbering and naming of the various components in FIGS. 1 and 2 are as follows.

The greenhouse comprises a building enclosure 1, a sun wall 2, a shade wall 3, a greenhouse ceiling 4, a cooling and heating fan 5, a ground heating pipe 6, a middle heating pipe 6a, a high-rise heating pipe 6b, a plant seedbed 7, a wet curtain 8, a low-temperature tube bundle heat exchanger 9, a heat exchange element 9a, a condensed water receiving tray 9b, a floor radiation heating coil 10, a crop vertical support tube bundle heat exchanger 11, a support type heat exchange element 11a, a wet curtain air processor 12 and a pipe-embedded type low-temperature tail end 13.

Detailed Description

Fig. 1 is a schematic view of the conventional high temperature heat supply end form of the agricultural greenhouse of the present invention, and fig. 2 is a schematic view of the end form of the present invention.

The existing conventional high temperature heating end forms of the agricultural greenhouse referred to in fig. 1 include: a conventional ground heating pipe 6 suitable for high-temperature water heating, a middle heating pipe 6a, a high-rise heating pipe 6b, a cooling and heating fan 5, and a wet curtain 8 for indoor cooling in summer.

The specific embodiment of the present invention is as follows.

In fig. 2, the greenhouse low-temperature distributed composite end device of the envelope structure 1 of the greenhouse comprises a ground heating pipe 6, a middle heating pipe 6a (without a high-rise heating pipe 6b), a cooling and heating fan 5, a wet curtain 8, a low-temperature tube bundle heat exchanger 9, a crop vertical support tube bundle heat exchanger 11, a floor radiant heating coil 10, a wet curtain air processor 12, and a pipe-embedded low-temperature end 13.

The greenhouse low-temperature type distributed composite tail end device formed by the heat and cold supply tail end devices has the following structure and position relationship.

The low-temperature tube bundle heat exchanger 9 is arranged in the lower space of the plant seedbed 7 in the production area, the heat exchange element 9a is a plastic tube, a steel fin or a copper tube aluminum fin tube structure, and the bottom of the low-temperature tube bundle heat exchanger is provided with a condensed water receiving tray 9b which falls to the ground.

The crop vertical support tube bundle heat exchanger 11 is vertically arranged at the upper part of the plant seedbed 7 of the production area, is positioned in the middle of plant stems and leaves, and is used as a fence or a support for supporting the growth of plants, at the moment, the support type heat exchange element 11a is of a plastic tube or metal tube structure, and the temperature of water flowing in the tube does not exceed the allowable temperature range of the growth of the plants; or arranged along the inner wall of the outer wall, and the bracket type heat exchange element 11a is a plastic pipe, a steel fin or a copper pipe aluminum fin pipe structure.

The radiant floor heating coil 10 is buried under the ground and has a plastic pipe structure.

The wet curtain air handler 12 is a box type structure combining a wet curtain, a surface cooler, a fan, a case, an indoor return air pipe and an outdoor air inlet pipe, and is communicated with low-temperature heat source water or cooling water, indoor return air and outdoor fresh air.

The embedded pipe type low-temperature tail end 13 is of a capillary plastic pipe structure, a plastic pipe structure or a metal light pipe structure and is communicated with low-temperature heat source water or cooling water.

It should be noted that the present invention provides a distributed composite terminal device for greenhouse low temperature type, and provides a specific implementation device for achieving the above purpose, and according to this overall solution, there may be different specific implementation measures, the above specific implementation is only one of them, and any other similar simple modified implementation, such as providing one or more sets of heat exchangers at other suitable positions in a larger space; or the technical mode can be applied to high and large spaces such as industrial factory buildings and other similar application occasions with the same or similar structures, and the technical mode falls into the protection scope of the utility model.

Claims (1)

1. Compound end equipment of warmhouse booth low temperature type distributing type, a serial communication port, the heat supply cooling end equipment of warmhouse booth's envelope (1), except including ground heating pipe (6), middle level heating pipe (6a), wet curtain (8), cold-hot air blower (5), still include low temperature tube bank heat exchanger (9), crop vertical support tube bank heat exchanger (11), floor radiation heating coil pipe (10), wet curtain air handler (12), inlay the compound end equipment of pipe formula low temperature (13), the warmhouse booth low temperature type distributing type compound end equipment that above-mentioned heat supply cooling end equipment constitutes, its structure and position relation are: the low-temperature tube bundle heat exchanger (9) is arranged in the lower space of the plant seedbed (7) in the production area, the heat exchange element (9a) is a plastic tube, a steel fin or a copper tube aluminum fin tube structure, and the bottom of the low-temperature tube bundle heat exchanger is provided with a condensed water receiving tray (9b) which falls to the ground; the crop vertical support tube bundle heat exchanger (11) is vertically arranged at the upper part of a plant seedbed (7) of a production area, is positioned in the middle of plant stems and leaves, and is used as a fence or a support for supporting plant growth, at the moment, the support type heat exchange element (11a) is of a plastic tube or metal tube structure, and the temperature of water flowing in the tube does not exceed the allowable temperature range of plant growth; or arranged along the inner wall of the outer wall, and the bracket type heat exchange element (11a) is a plastic pipe, a steel fin or a copper pipe aluminum fin pipe structure; the floor radiant heating coil (10) is buried under the ground and is of a plastic pipe structure; the wet curtain air processor (12) is of a box type structure compounded with a wet curtain, a surface cooler, a fan, a case, an indoor return air pipe and an outdoor air inlet pipe, and is communicated with low-temperature heat source water or cooling water, indoor return air and outdoor fresh air; the pipe-embedded type low-temperature tail end (13) is of a capillary plastic pipe structure, a plastic pipe structure or a metal light pipe structure and is communicated with low-temperature heat source water or cooling water.

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