CN215892716U - Accurate even control by temperature change whirlwind air current's artificial crop climate chamber - Google Patents
Accurate even control by temperature change whirlwind air current's artificial crop climate chamber Download PDFInfo
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- CN215892716U CN215892716U CN202022310506.6U CN202022310506U CN215892716U CN 215892716 U CN215892716 U CN 215892716U CN 202022310506 U CN202022310506 U CN 202022310506U CN 215892716 U CN215892716 U CN 215892716U
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Abstract
The utility model provides a phytotron of accurate uniform temperature control cyclone airflow, which is composed of at least two air supply outlets, two air return inlets and two auxiliary fans, all of which are arranged diagonally to form a cyclone airflow field of the phytotron; the temperature control adopts two-stage heat balance and two-variable temperature control measures: the first stage of energy balance, namely preparing cold water and hot water; the second stage is to balance the heat exchange quantity between the artificial climate chamber and the outside by using cold water or hot water; the two variables for adjusting the energy are the water inlet flow and the water inlet temperature of the wind heat exchanger; according to the utility model, a temperature control model of the crop artificial climate chamber is deduced, and a theoretical basis is provided for accurate temperature control of the crop artificial climate chamber; three signals are proposed, on which the temperature control must be based: solar radiation, heat transfer flow of the building enclosure and indoor temperature, and providing corresponding temperature difference values; embodiments are presented; the utility model has important significance and practical value in the theory and technical innovation.
Description
Technical Field
The utility model relates to the field of climate chambers, in particular to an artificial crop climate chamber capable of accurately and uniformly controlling temperature of cyclone airflow.
Background
Plant growth is subject to a variety of environmental factors: the influence of illumination, temperature, relative humidity, carbon dioxide, etc., in order to accelerate the progress of modern agriculture, apply crop artificial climate chamber extensively, a kind of experimental facilities which controls, changes and reappears many meteorological conditions manually in the closed system, study growth, blooming, fructification and relation of these factors of the crop; the current artificial climate chamber can be divided into 3 types of box type, room type and mixed type according to the structure: the box type rice seed selection device has the advantages of small volume and good adjustability, but the working area is generally only a few square meters, the production condition of large-area crops cannot be simulated, and the device is not suitable for rice fine variety selection; the room type building is a complete building with a large scale and consists of a machine room, a control center and a plurality of environment control rooms with different sizes, and the working area can be dozens to hundreds of square meters; the mixing chamber is formed by placing a plurality of chambers in a room type artificial climate chamber;
in the rice breeding research, high temperature causes damage to the growth and development and the yield of rice, and particularly the heading and flowering stage of rice is more obvious; in recent years, extreme weather has frequently occurred in which high temperature heat damage has a serious influence on rice production; in 2013 and 2016, the maturing rate of some rice varieties is obviously reduced in high-temperature weather of Yangtze river and Yangtze river basin in China, and great production loss is caused; different rice varieties have different high-temperature sensitivities, and numerous studies at home and abroad show that high-temperature heat damage has obvious influence on the growth and development of crops, the quality of individual groups, physiological characteristics, photosynthesis, quality and yield; the difference of floral organs and physiological characteristics between heat-resistant varieties and heat-labile varieties is obvious; the method has important significance for ensuring the grain safety in screening and identifying the heat-resistant varieties of the rice; in order to accelerate the seed selection progress of the rice, the artificial climate chamber for identifying the heat resistance of the rice needs to be built and only a chamber artificial climate chamber with a larger area is needed; however, room air conditioning is mostly adopted in the current room type artificial climate chamber for temperature adjustment, and the adjustment of the high temperature air temperature in the artificial climate chamber is realized by controlling the rotating speed of a radiator fan or the on-off of a refrigerator through the refrigerator and an air circulation system in the artificial climate chamber according to the difference between a room temperature signal and a set temperature; indoor air circulates between the air heat exchanger of the refrigerator and crops in the artificial climate chamber; when the indoor temperature is too high, the air heat exchanger of the refrigerator is an evaporator, the evaporation temperature of a refrigerant is about 3-8 ℃, high-temperature gas in the artificial climate chamber can be condensed and separated out of a lot of moisture in the air on the surface of the low-temperature evaporator, and the humidity in the artificial climate chamber is reduced; in addition, according to the design requirement of a refrigerator, the temperature difference between the inlet and the outlet of the air heat exchanger is more than 8 ℃, and the temperature uniformity of the rice ear layer in a phytotron for identifying the heat resistance of rice is required to be within 1 ℃; in the existing artificial climate chamber, a common artificial climate chamber is only provided with a single air supply outlet according to the air supply and return modes of a room air conditioner, the air supply outlet is arranged above one side of the artificial climate chamber, and the return air is arranged at the back side of the air supply outlet of a heat exchanger; the temperature difference of the air supply mode on an air flow line in front of an air supply outlet is large, cold air or hot air is difficult to uniformly diffuse indoors, air at an air outlet is higher than the pressure of an air suction inlet because the air pressure of the air supply outlet is higher than that of the air suction inlet, short circuit and backflow are not performed when heat is fully exchanged with indoor air, the uniformity of an indoor temperature field is difficult to realize, the four corners of a rice spike layer are dead corners of air flow, heat exchange is not fully performed, and the temperatures of the four corners are greatly different from the temperature of a central area; it has also been reported that the crop phytotron in Japan adopts the mode of upward air supply and trench return air for improving the indoor air flow; if the number of the air supply outlets and the ditches on the tops of the air supply modes is enough, the flowing uniformity of air can be improved to a certain extent, but the indoor air temperature is still different on a height layer, the ditches are linear, the air speed at the two sides of each ditch far away from the ditches is small, the temperature uniformity of a plane layer is difficult to be very high, and in addition, the effective area of a crop artificial climate laboratory is also reduced by the air return mode of the ditches.
According to the temperature regulation and control mode of the crop artificial climate chamber, three problems are solved: (1) the airflow has dead corners, so that a uniform temperature field is difficult to obtain; (2) the single room temperature signal is used as the start-stop of the temperature regulation system, and the response lags behind the change of the heat transfer quantity of the outside to the artificial climate chamber, particularly the change of solar irradiation; (3) the temperature is directly regulated and controlled by the refrigerator, the temperature difference is overlarge, and the temperature of the evaporator of the refrigerator is too low, so that the humidity of the artificial climate chamber is easily reduced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the utility model provides the artificial crop climate chamber capable of accurately and uniformly controlling the temperature of the cyclone airflow, which can effectively improve the indoor temperature field, particularly the temperature uniformity, the temperature and the humidity of the crop layer of the rice heat-resistant artificial climate chamber can accurately reach the standard, so as to solve the problems in the background art.
(II) technical scheme
In order to achieve the purpose, the utility model is realized by the following technical scheme: an artificial crop climate chamber capable of accurately and uniformly controlling temperature of cyclone airflow comprises an artificial climate chamber, a refrigeration and heat supply system, a cyclone flow system of the artificial climate chamber and a temperature and humidity detection and temperature control system; the crop phytotron is a square or rectangular crop layer, at least a first wall body around the crop phytotron is a glass wall surface, the rest surfaces of the crop phytotron can also be glass walls, the glass walls are built by double-layer hollow glass, and a second wall body is a heat insulation wall body; the refrigeration and heat supply system comprises a wind source heat pump water chilling unit, a cold water tank, a cold water circulating pump, a hot water tank and a hot water circulating pump; the cold water tank and the hot water tank are used for preparing constant-temperature cold water and constant-temperature hot water by an air source heat pump water chilling unit; the heat exchange and air supply system of the artificial climate chamber comprises a heat exchange system of an air heat exchanger, a cyclone flow system of the artificial climate chamber and an air supply pipeline; the heat exchange system of the air heat exchanger comprises a finned tube heat exchanger, a blower and an air supply pipeline, and is arranged outside the artificial climate chamber, wherein an air inlet of the blower is a return air inlet of the artificial climate chamber, an outlet of the blower is connected to an air inlet of the finned tube heat exchanger through the air supply pipeline, and an air outlet of the finned tube heat exchanger is an air supply outlet of the artificial climate chamber; the cyclone flow system of the artificial climate chamber is composed of at least two air supply outlets, two air return inlets, two auxiliary axial flow fans and measuring heads for uniformly inclining and diagonally configuring, and the temperature and humidity detection and temperature control system comprises the temperature and humidity of the artificial climate chamber, the outdoor temperature, the solar irradiation intensity, the temperature of a cold water tank, the temperature of a hot water tank and the temperature of an inlet and an outlet of an air heat exchanger.
Preferably, in the artificial climate indoor cyclone flow system, the two air supply outlets are arranged above the top of the artificial climate chamber and are respectively arranged on the diagonal wall bodies of the first wall body and the second wall body, one air supply outlet is arranged on the first wall body at the southwest corner, the other air supply outlet is arranged on the second wall body at the northeast corner, or one air supply outlet is arranged on the first wall body at the southeast corner, and the other air supply outlet is arranged on the second wall body at the northwest corner, so that the air sent out by the two air supply outlets forms a cyclone flow on a horizontal plane layer in principle; the two air return openings are arranged below the artificial climate chamber and near the ground, and are also respectively arranged on the diagonal wall bodies of the first wall body and the second wall body; and the artificial climate chambers are respectively provided with an auxiliary axial flow fan.
Preferably, the temperature control system is a two-stage heat balance system and a two-variable temperature control system; the first-stage energy balance system is a refrigeration and heat supply system for preparing cold water with a constant temperature in a cold water tank and hot water with a constant temperature in a hot water tank; the second-stage energy balance system is a heat exchange and air supply system of the artificial climate chamber, which balances the heat exchange quantity between the artificial climate chamber and the outside by using the cold quantity or the heat quantity of the cold water tank or the hot water tank; the first variable is the change of the water inlet flow of the wind heat exchanger; the second variable is the inlet water temperature change of the heat exchanger; the refrigeration and heat supply system comprises a wind source heat pump water chilling unit, a cold water tank, a hot water tank and a water circulating pump; the air source heat pump water chilling unit consists of a compressor, a water heat exchanger, an air heat exchanger, a throttle valve and a four-way valve, and refrigeration circulation and heating circulation of refrigerant can be organized by switching the four-way valve; during refrigeration circulation, the water heat exchanger is an evaporator to generate cold water; during heating circulation, the water heat exchanger is a condenser to generate hot water; after the water outlet of the water heat exchanger is connected with a water circulating pump, the outlet of the water circulating pump is respectively connected with a cold water tank and a hot water tank in parallel through a cold water valve F1 and a hot water valve F3; a water outlet of the cold water tank and a water outlet of the hot water tank are respectively connected with a cold water valve F2 and a hot water valve F4 and then connected with a water inlet of the water heat exchanger to form a cold water circulation loop and a hot water circulation loop; the water temperatures of the cold water tank and the hot water tank are preset to be 10-15 ℃ lower and 10-15 ℃ higher than the temperature set by the artificial climate chamber.
Preferably, the inlet water temperature T of the wind heat exchangerw1The pressure is adjusted by a mixed flow pump or a mixed flow variable frequency pump, and the inlet of the mixed flow pump is connected with a cold water tank and a hot water tank; the mixed flow variable frequency pump consists of a cold/hot water ratio regulating valve capable of automatically regulating and a variable frequency flowThe pump can also consist of a cold water variable frequency pump and a hot water variable frequency flow pump; the cold/hot water proportion regulating valve is similar to a bathhouse sprayer, but the proportion of cold water and hot water is automatically regulated by a program; or a plurality of water tanks are prepared, water with different water temperatures is respectively filled in the water tanks, and the water in the water tanks with different water temperatures is switched and circulated according to the requirement.
Preferably, the temperature regulation of the one precision uniform temperature controlled cyclonic airflow phytotron requires the detection of three quantities: the first is the solar radiation heat of the artificial climate chamber, which is measured by the total radiometer, and the output parameter is the temperature difference delta T between the temperature of the receiving disk of the total radiometer and the ambient constant temperaturee(ii) a The second is an adherence heat flow meter which can measure the heat transfer flow rate between the indoor and outdoor through the enclosure structure and output parameters of the temperature difference delta T between the outdoor wall and the indoor wall∞(ii) a Third is the difference between the indoor temperature and the set temperature, recorded as Δ T0。
Preferably, the initial temperature of cold water of the air heat exchanger is not lower than the set room temperature of 5 ℃; when dehumidification is needed, a small stream of shunt air is used for dewing and dehumidification through a refrigeration dehumidifier, and dry air after dehumidification is merged into main stream circulating air.
Preferably, the temperature control system pursues that the temperature of the artificial climate chamber reaches and stabilizes at a certain set value according to an energy balance equation (1) of the artificial climate chamber, and adjusts refrigeration or heat supplement of the artificial climate chamber;
in the formula (1), Q1Expressing the heat exchange quantity, Q, of the wind heat exchanger to the crop phytotron2The heat exchange quantity of the wind heat exchanger to the crop artificial climate chamber is shown, the input heat to the artificial climate chamber is appointed to be a positive sign, and the output heat is appointed to be a negative sign; mcpThe equivalent heat capacity of the artificial climate chamber is represented, the equivalent heat capacity of the artificial climate chamber is mainly the air heat capacity of the artificial climate chamber, and the equivalent heat capacity of the artificial climate chamber additionally comprises the equivalent heat capacity of a bed and an enclosure; dT/dT is the average temperature change rate of the artificial climate chamber; when the temperature reaches a stable valueWhen the formula (1) is changed to,
Q1＝-Q2 (2)
the formula (2) shows that the heat of the wind heat exchanger is always opposite to the heat exchange quantity of the outside to the artificial climate chamber, when the outside inputs heat, the wind heat exchanger sends cold, otherwise, the wind heat exchanger sends cold; when the temperature of the artificial climate chamber does not change relatively, but only the artificial climate chamber exchanges heat with the outside, Q2Is not 0, and therefore Q1Must be based on Q2Starting a cold water supply circulation or a hot water supply circulation and adjusting the water circulation quantity according to the positive direction, the negative direction and the size of the water; q2Mainly comprises an envelope structure of a phytotron, heat transfer between the envelope structure and the outside and solar radiation heat transfer,
Q2＝EαA+KF(T∞-T) (3)
the first term on the right side of the medium sign in the formula (3) is solar radiation heat which is in direct proportion to the product of solar radiation intensity E, equivalent absorptivity alpha of a solar radiation surface and effective irradiation area A, wherein E is related to climate state and time, in a climatic chamber which introduces natural solar radiation, the energy of solar radiation is the key point of energy regulation, and the variation fluctuation is large; the second term on the right side of the medium sign in the formula (3) is the heat transfer quantity of the enclosure structure of the artificial climate chamber, K is the equivalent average heat transfer coefficient, F is the enclosure area, T is the heat transfer quantity of the enclosure structure of the artificial climate chamber∞The outside ambient temperature, which varies greatly; t is the air temperature in the artificial climate chamber;
Q1indicating the heat exchange quantity of the wind heat exchanger to the crop phytotron
Q1＝mwcw(Tw2-Tw1)＝maca(Ta1-Ta2) (4)
In formula (4): m isw、maThe unit kg/s of water flow in the air heat exchanger pipe and air flow outside the air heat exchanger pipe; t isw1、Tw2The temperature of inlet water and outlet water of the air heat exchanger is measured in K, the temperature of inlet water is the temperature of cold water tank or hot water tank, the temperature of water in the water tank is basically constant, and the heat pump water chilling unit is automatically controlled; t isa1、Ta2Respectively the inlet and outlet water temperature of the wind heat exchangerK；cw、caSpecific heat of water and air, respectively, in kJ/(kg. K); q1And Q2Balance, and is also limited by the heat transfer equation of the wind heat exchanger and the formula (5),
Q＝KFΔT (5)
in formula (5): k is the heat transfer coefficient of the heat exchanger, and K is f (m)w,ma) The flow velocity is a function of the water flow velocity inside the pipe and the wind flow velocity outside the pipe, and is increased along with the increase of the flow velocity, particularly the influence of the wind flow velocity outside the pipe is large, and the specific value is determined by experiments; f is the heat transfer area of the heat exchanger; delta T is the logarithmic heat transfer temperature difference of the heat exchanger,
Δ T also increases with increasing flow velocity, since T increases with the velocity of the water/wind inside and outside the pipea2-Tw2And decreases. Therefore, the Q value can be adjusted to a certain degree by adjusting the flow rates of water in the air heat exchanger pipe and air outside the air heat exchanger pipe; when the water flow and the wind flow of the wind device reach the limit flow and still can not meet the energy balance, the inlet water temperature T of the wind heat exchanger needs to be adjustedw1。
Preferably, the temperature regulation of the artificial crop climate chamber with accurate and uniform temperature control cyclone airflow is realized by approximately expressing a regulation function of water circulation quantity as the inlet water temperature and the outlet water temperature of the wind heat exchanger are fixed
In the formula, a, b and c are proportionality coefficients of the three, and need to be calibrated by actual data when the irradiation, the enclosure heat transfer and the indoor heat capacity are respectively changed at 1 ℃ on the sensor, and F is F/F0Is the area factor of irradiation, F, F0Actual, set irradiation areas, respectively; when the sum of the equal sign of formula (7) is on the right, (af. DELTA.T)e+bΔT∞+cΔT0) If the temperature is more than 0, the circulation of cold water is performed; (af. DELTA.T)e+bΔT∞+cΔT0) If less than 0, the heating water circulates.
(III) advantageous effects
The utility model provides an artificial crop climate chamber capable of accurately and uniformly controlling temperature of cyclone airflow, which has the following beneficial effects:
by establishing the concept and the specific technical scheme of the cyclone temperature field, the uniformity of the temperature field of the artificial climate chamber is improved; the two variables are provided for the first time, namely the energy balance strategy of the artificial climate chamber is adjusted by using the flow change of inlet water and inlet air of the heat exchanger and the change of inlet water temperature, so that the large-flow large-temperature difference can quickly respond to the energy imbalance of the artificial climate chamber, the small-flow small-temperature difference can be used for reducing the temperature fluctuation of the artificial climate chamber, and the speed and the precision of temperature control are improved; an equation set of energy balance and heat transfer of the artificial climate chamber is established, and the problems of heat capacity influence of temperature control and hysteresis of temperature control are paid attention to for the first time; three temperature control index parameters of the artificial climate chamber are provided: the solar radiation heat, the input and output heat of the building enclosure and the temperature of the artificial climate chamber change the traditional single parameter mode that the temperature regulation and control only depends on the temperature of the artificial climate chamber; and provides the testing means of the solar radiation heat and the extracted output radiation temperature difference signal delta Te(ii) a Also provides a method for measuring the heat transfer flow between the indoor and outdoor through the building enclosure, and converts the heat transfer flow into an outdoor and indoor temperature difference signal which is recorded as delta T∞(ii) a Third is the difference between the indoor temperature and the set temperature, recorded as Δ T0. The functional relation between the water flow of the temperature-control adjusting heat exchanger and index parameters of three temperature controls is established, a theoretical basis is provided for intelligently adjusting and controlling the temperature of the artificial climate chamber, the problem that the air supply mode of the existing crop artificial climate chamber is overcome, and the problem that the requirements for identifying the temperature and the humidity of the accurate control crop layer of the rice heat-resistant artificial climate chamber cannot be met is solved, so that the indoor temperature field of the artificial crop climate chamber can be effectively improved, and particularly the temperature uniformity, the temperature and the humidity of the crop layer of the rice heat-resistant artificial climate chamber can accurately reach the standard.
Drawings
FIG. 1 is a schematic diagram of the overall construction of a working substance climate chamber of the present inventor;
FIG. 2 is a front view of the inventor's work piece climate chamber;
FIG. 3 is a top view of the present inventor's work piece climate chamber;
fig. 4 is a schematic flow diagram of a cooling and heating system and a hot water circulating system of a work climate chamber of the inventor.
In the figure: 1 artificial climate chamber, 2 glass slope roof, 3 first wall body, 4 second wall body, 5 transparent window, 6 first finned tube heat exchanger, 7 first blower, 8 air heat exchanger, 9 second finned tube heat exchanger, 10 second blower, 11 first axial flow fan, 12 second axial flow fan, 13 water tank, 14 water circulating pump, 15 crop layer, 16 first glass wall, 17 second glass wall, 18 first return air inlet, 19 second return air inlet, 20 first supply air outlet, 21 second supply air outlet, 22 water heat exchanger 23 compressor, 24 throttle valve, 25 four-way valve, 26 mixed flow variable frequency pump, 27 proportion regulating valve, 28 wind heat exchanger.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The embodiment of the utility model provides an artificial crop climate chamber with accurate and uniform temperature control cyclone airflow, which is collectively illustrated by fig. 1, fig. 2, fig. 3 and fig. 4, wherein fig. 2 is a front view of the artificial crop climate chamber, and fig. 3 is a top view of the artificial crop climate chamber; an artificial crop climate chamber capable of accurately and uniformly controlling temperature of cyclone airflow comprises an artificial climate chamber 1, a refrigeration and heat supply system, an artificial climate chamber heat exchange and air supply system and a temperature and humidity detection and temperature control system; the artificial climate chamber 1 is a square or rectangular crop layer 15, the normal south of a glass slope top 2 is the north crop artificial climate chamber, the slope of the glass slope top 2 is north high, south low, at least a second wall 4 around the glass wall is a glass wall, an east wall and a west wall are a first glass wall 16 and a second glass wall 17 respectively, the glass walls are built by double-layer hollow glass, and the first wall 3 is a heat insulation wall; the refrigeration and heating system, see fig. 2 and 3, comprises a wind source heat pump water chilling unit A, a water tank 13 and a water circulating pump 14; the system comprises a cold water tank and a hot water tank, wherein air source heat pump water chilling unit A is used for preparing constant temperature cold water and constant temperature hot water; the heat exchange and air supply system of the artificial climate chamber comprises a heat exchange system of an air heat exchanger, a cyclone flow system of the artificial climate chamber and an air supply pipeline; the heat exchange system of the wind heat exchanger, refer to fig. 1, includes a first finned tube heat exchanger 6, a second finned tube heat exchanger 9, a first blower 7, a second blower 10 and a blast pipe, which are installed outside the artificial climate chamber, the air inlets of the blowers are a first return air inlet 18 and a second return air inlet 19 of the artificial climate chamber, the outlets of the first blower 7 and the second blower 10 are connected to the air inlets of the first finned tube heat exchanger 6 and the second finned tube heat exchanger 9 by the blast pipe, and the air outlets of the finned tube heat exchanger are a first blast outlet 20 and a second blast outlet 21 of the artificial climate chamber; the cyclone flow system in the artificial climate chamber is formed by obliquely and diagonally configuring at least two air supply outlets, two air return inlets, a first axial flow fan 11 and a second axial flow fan 12 to form a cyclone flow airflow field in the artificial climate chamber, so that the uniformity of a temperature field in the artificial climate chamber is improved; after the blower is started, the air in the artificial climate chamber can circulate among the first air return opening 18, the second air return opening 19, the air heat exchanger 28, the first air supply opening 20, the second air supply opening 21 and the crop layer 15 of the artificial climate chamber, then the refrigeration and heat supply system provides refrigeration or heat, the cold water or hot water which is connected with the heat exchange water pipes of the first finned tube heat exchanger 6 and the second finned tube heat exchanger 9 through the water tank 13 circulates, the input or output heat between the room temperature of the artificial climate and the outside is taken away or supplemented, the energy balance is realized, and the set temperature and the stability of the artificial climate chamber are maintained; the temperature and humidity detection and temperature control system comprises measuring heads of the temperature and humidity of an artificial climate chamber, the outdoor temperature, the solar radiation intensity, the water temperature of a cold water tank, the water temperature of a hot water tank and the air temperature of an inlet and an outlet of an air heat exchanger, which are not marked in the figure.
The specific design scheme of the artificial climate indoor cyclone flow system is that the organization mode of the artificial climate indoor in the south and north is that two first air supply outlets 20 and two second air supply outlets 21 are arranged above the top of the artificial climate chamber and are respectively arranged on the diagonal wall bodies of a first wall body 3 and a second wall body 4, the second air supply outlet 21 is arranged on the first wall body at the southwest corner, the first air supply outlet 20 is arranged on the second wall body at the northeast corner, see fig. 2 and 3, and the principle is that the wind sent out by the two air supply outlets forms a cyclone flow on the horizontal plane layer; the first air return opening 18 and the second air return opening 19 are arranged below the artificial climate chamber and near the ground, and are also respectively arranged on the oblique diagonal wall bodies of the first wall body and the second wall body, and the position of each air return opening and the corresponding air supply opening are on the same vertical line, for example, the air supply opening is arranged on the first wall body at the southwest corner, and the corresponding air return opening is also arranged on the first wall body at the southwest corner; the air supply outlet is provided with two layers of grid strips with adjustable wind directions, one layer of grid strips can adjust the up-down wind direction, and the other layer of grid strips can adjust the left-right wind direction; a first axial flow fan 11 and a second axial flow fan 12 are respectively arranged on the diagonal line of a south second wall body 0.5-1.0 meters above a crop layer 15 of the artificial climate chamber, one fan blows south along the west wall in the northwest direction, and the other fan blows north along the east wall in the southeast corner; therefore, cold air sent out by the air heat exchanger above the artificial climate chamber passes through the two layers of rotational flows and then is pumped to exchange heat from the first air return port 18 and the second air return port 19 below, so that the temperature uniformity of the artificial climate chamber is greatly improved.
Embodiment the first stage of energy balance system, see fig. 4, is a refrigeration and heat supply system for preparing cold water with constant temperature in a cold water tank and hot water with constant temperature in a hot water tank, comprising a wind source heat pump water chilling unit a, a water tank 13 and a water circulating pump 14; the air source heat pump water chilling unit A consists of a compressor 23, a water heat exchanger 22, an air heat exchanger 8, a throttle valve 24 and a four-way valve 25, and refrigeration cycle and heating cycle of refrigerant can be organized by switching the four-way valve 25; in the refrigeration cycle, the water heat exchanger 22 is an evaporator to generate cold water; during heating circulation, the water heat exchanger is a condenser to generate hot water; after the water outlet of the water heat exchanger is connected with a water circulating pump 14, the outlet of the water circulating pump is respectively connected with a water tank 13 in parallel through a cold water valve F1 and a hot water valve F3; the water tank is divided into a cold water tank and a hot water tank, and the water outlets of the cold water tank and the hot water tank are respectively connected with the cold water valve F2 and the hot water valve F4 and then connected with the water inlet of the water heat exchanger 22 to form a cold water circulation loop and a hot water circulation loop; during refrigeration cycle, hot water valves F3 and F4 of a water circulation loop of the hot water tank are closed;
the second-stage energy balance system of the embodiment, referring to fig. 4, is a water delivery circulation loop formed by a water tank 13, a mixed flow variable frequency pump and an air heat exchanger 28, and completes energy delivery from a first system to a second system; the mixed flow variable frequency pump is composed of a cold/hot water ratio regulating valve 27 and a variable frequency flow pump 26 which can be automatically regulated, and also can be composed of a cold water variable frequency pump and a hot water variable frequency flow pump, and the embodiment adopts a first mode; the cold/hot water proportion regulating valve is similar to that of a bathhouse sprayer, but can automatically regulate the proportion of cold water and hot water according to a set program; when the artificial climate chamber needs to be cooled, the air source heat pump water chilling unit is in a refrigeration state, as shown in fig. 3, the water circulating pump 14 and the mixed flow variable frequency pump 26 are started, the cold water valve F1 is opened, the cold water valve F2 is closed, the hot water valves F3 and F4 are closed, and cold water flows through the cold water tank, the mixed flow variable frequency pump, the air heat exchanger 28, the water heat exchanger 22, the water circulating pump 14 and the cold water valve F1 and then flows back to the cold water tank, so that the process of sending cold energy to the artificial climate chamber is completed; at the moment, a blower of the air heat exchanger loop is started, and an auxiliary axial flow fan of the artificial climate chamber is started; when heat needs to be supplied to the artificial climate chamber, the air source heat pump water chilling unit is in a heating state, as shown in fig. 3, the water circulating pump 14 and the mixed flow variable frequency pump are started, the hot water valve F3 is opened, the cold water valves F1 and F2 are closed, the hot water valve F4 is closed, hot water passes through the hot water tank, the mixed flow variable frequency pump, the air heat exchanger 28, the water heat exchanger (evaporator) 22, the hot water valve F3 and the backflow hot water tank, and the process of supplying cold energy to the artificial climate chamber is completed; at the moment, a blower of the air heat exchanger loop is started, and an auxiliary axial flow fan of the artificial climate chamber is started; the water temperatures of the cold water tank and the hot water tank are preset to be 10-15 ℃ lower and 10-15 ℃ higher than the temperature set by the artificial climate chamber.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An artificial crop climate chamber capable of accurately and uniformly controlling temperature of cyclone airflow comprises an artificial climate chamber, a refrigeration and heat supply system, a cyclone flow system of the artificial climate chamber and a temperature and humidity detection and temperature control system; the method is characterized in that: the artificial climate chamber is a square or rectangular crop bed, at least a first wall body around the artificial climate chamber is a glass wall surface, the rest walls are glass or heat insulation walls, the glass wall is built by double-layer hollow glass, and a second wall body is a heat insulation wall body; the refrigeration and heat supply system comprises a wind source heat pump water chilling unit, a cold water tank, a cold water circulating pump, a hot water tank and a hot water circulating pump; the cold water tank and the hot water tank are used for preparing constant-temperature cold water and constant-temperature hot water by an air source heat pump water chilling unit; the heat exchange and air supply system of the artificial climate chamber comprises a heat exchange system of an air heat exchanger, a cyclone flow system of the artificial climate chamber and an air supply pipeline; the heat exchange system of the air heat exchanger comprises a finned tube heat exchanger, a blower and an air supply pipeline, and is arranged outside the artificial climate chamber, wherein an air inlet of the blower is a return air inlet of the artificial climate chamber, an outlet of the blower is connected to an air inlet of the finned tube heat exchanger through the air supply pipeline, and an air outlet of the finned tube heat exchanger is an air supply outlet of the artificial climate chamber; the cyclone flow system of the artificial climate chamber is composed of at least two air supply outlets, two air return inlets, two auxiliary axial flow fans and measuring heads for uniformly inclining and diagonally configuring, and the temperature and humidity detection and temperature control system comprises the temperature and humidity of the artificial climate chamber, the outdoor temperature, the solar irradiation intensity, the temperature of a cold water tank, the temperature of a hot water tank and the temperature of an inlet and an outlet of an air heat exchanger.
2. The precision uniform temperature controlled cyclonic airflow microclimate chamber as defined in claim 1, further comprising: in the artificial climate indoor cyclone flow system, the air supply outlets are arranged above the top of the artificial climate chamber and are respectively arranged on the oblique diagonal wall bodies of the first wall body and the second wall body, one air supply outlet is arranged on the first wall body at the southwest corner, the other air supply outlet is arranged on the second wall body at the northeast corner, or one air supply outlet is arranged on the first wall body at the southeast corner, and the other air supply outlet is arranged on the second wall body at the northwest corner, so that the air sent out by the two air supply outlets forms a cyclone flow on a horizontal plane layer; the two air return openings are arranged below the artificial climate chamber and near the ground, and are also respectively arranged on the diagonal wall bodies of the first wall body and the second wall body; and the artificial climate chambers are respectively provided with an auxiliary axial flow fan.
3. The precision uniform temperature controlled cyclonic airflow microclimate chamber as defined in claim 1, further comprising: the temperature control system is a two-stage heat balance system and a two-variable temperature control system; the two-stage heat balance system comprises a first-stage energy balance system and a second-stage energy balance system, wherein the first-stage energy balance system is a refrigeration and heat supply system for preparing cold water with a constant temperature in a cold water tank and hot water with a constant temperature in a hot water tank; the second-stage energy balance system is a heat exchange and air supply system of the artificial climate chamber, which balances the heat exchange quantity between the artificial climate chamber and the outside by using the cold quantity or the heat quantity of the cold water tank or the hot water tank; the two-variable temperature control system comprises a first variable and a second variable, wherein the first variable is the change of the water inlet flow of the wind heat exchanger; the second variable is the inlet water temperature change of the heat exchanger; the refrigeration and heat supply system comprises a wind source heat pump water chilling unit, a cold water tank, a hot water tank and a water circulating pump; the air source heat pump water chilling unit consists of a compressor, a water heat exchanger, an air heat exchanger, a throttle valve and a four-way valve, and refrigeration circulation and heating circulation of refrigerant can be organized by switching the four-way valve; during refrigeration circulation, the water heat exchanger is an evaporator to generate cold water; during heating circulation, the water heat exchanger is a condenser to generate hot water; after the water outlet of the water heat exchanger is connected with a water circulating pump, the outlet of the water circulating pump is respectively connected with a cold water tank and a hot water tank in parallel through a cold water valve F1 and a hot water valve F3; a water outlet of the cold water tank and a water outlet of the hot water tank are respectively connected with a cold water valve F2 and a hot water valve F4 and then connected with a water inlet of the water heat exchanger to form a cold water circulation loop and a hot water circulation loop; the water temperatures of the cold water tank and the hot water tank are preset to be 10-15 ℃ lower and 10-15 ℃ higher than the temperature set by the artificial climate chamber.
4. The precision uniform temperature controlled cyclonic airflow microclimate chamber as defined in claim 1, further comprising: the temperature of inlet water of the air heat exchanger is regulated by a mixed flow variable frequency pump, and the inlet of the mixed flow variable frequency pump is connected with a cold water tank and a hot water tank; the mixed flow variable frequency pump consists of a cold/hot water ratio adjusting valve capable of automatically adjusting and a variable frequency flow pump, or consists of a cold water variable frequency pump and a hot water variable frequency flow pump; the cold/hot water ratio regulating valve automatically regulates the ratio of cold water to hot water by a program.
5. The precision uniform temperature controlled cyclonic airflow microclimate chamber as defined in claim 1, further comprising: the initial temperature of cold water of the air heat exchanger is not lower than the set room temperature of 5 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535437A (en) * | 2020-04-17 | 2020-08-14 | 苏州磐际建筑科技有限公司 | Low-energy-consumption phase-change building comfortable and healthy system |
| CN112128956A (en) * | 2020-10-16 | 2020-12-25 | 安徽省农业科学院水稻研究所 | Accurate even control by temperature change whirlwind air current's artificial crop climate chamber |
| CN115853344A (en) * | 2022-12-28 | 2023-03-28 | 安徽乐京新能源科技有限公司 | Outdoor constant temperature tent with coolant pipeline |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535437A (en) * | 2020-04-17 | 2020-08-14 | 苏州磐际建筑科技有限公司 | Low-energy-consumption phase-change building comfortable and healthy system |
| CN111535437B (en) * | 2020-04-17 | 2022-11-01 | 苏州磐际智储能源科技有限公司 | Low-energy-consumption phase-change building comfortable and healthy system |
| CN112128956A (en) * | 2020-10-16 | 2020-12-25 | 安徽省农业科学院水稻研究所 | Accurate even control by temperature change whirlwind air current's artificial crop climate chamber |
| CN115853344A (en) * | 2022-12-28 | 2023-03-28 | 安徽乐京新能源科技有限公司 | Outdoor constant temperature tent with coolant pipeline |
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