CN212911007U - Constant-temperature frequency-conversion energy-saving cooling system - Google Patents
Constant-temperature frequency-conversion energy-saving cooling system Download PDFInfo
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- CN212911007U CN212911007U CN202021071194.1U CN202021071194U CN212911007U CN 212911007 U CN212911007 U CN 212911007U CN 202021071194 U CN202021071194 U CN 202021071194U CN 212911007 U CN212911007 U CN 212911007U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
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Abstract
The utility model provides a constant temperature frequency conversion energy-saving cooling system, which comprises a temperature sensor, a temperature control instrument, a frequency converter, a power box, a negative pressure fan and a cooling water curtain piece assembly, wherein the power box is connected with the frequency converter, the frequency converter is connected with the temperature control instrument, the temperature control instrument is connected with the temperature sensor, and the frequency converter controls the start, stop and rotation speed of the negative pressure fan; the cooling water curtain sheet assembly comprises a wet curtain water pump, a water return pipe, a water pool, a manual valve, a filter, a water feeding pipe tee joint, a flexible connecting pipe, a U-PVC pipe and a water return pipe tee joint, wherein the U-PVC pipe is connected with the flexible connecting pipe through the water feeding pipe tee joint to achieve water source distribution, the flexible connecting pipe is connected with the upper end of the cooling water curtain sheet, the lower end of the cooling water curtain sheet is connected with the water return pipe tee joint, and the water of the cooling water curtain sheet is collected by the water return pipe tee joint and flows back to the water pool through the water return pipe to achieve circulation. The device can maintain constant temperature, reduce internal noise, save the running cost.
Description
Technical Field
The utility model belongs to the technical field of the facility agriculture, a novel energy-conserving cooling system of constant temperature frequency conversion is related to.
Background
The traditional glass greenhouse cooling technology is that a cooling water curtain piece device is installed at one end of a greenhouse window, a negative pressure fan is installed at the opposite end of the greenhouse window, hot air in a greenhouse is pumped out by the negative pressure fan, air pressure difference is caused indoors and outdoors while ventilation, heat dissipation and dust removal are carried out, external air is promoted to absorb heat through a water film formed by the cooling water curtain piece to be cooled instantly, cool air can be blown into the interior of the greenhouse continuously, and a comfortable, cool and fresh environment is created. No matter how hot summer is, the temperature of the greenhouse can be kept between 24 ℃ and 29 ℃ all the time by the cooling wet curtain and the negative pressure fan ventilation cooling system, so that the air is circulated indoors and outdoors, and the oxygen content of the air is increased. Compared with the air conditioner, the air conditioner has the advantages that the manufacturing cost is 1/5 of the air conditioner, the operation cost is 1/20 of the air conditioner, and then the equipment has simple structure, high cooling speed, durability, stability and the like.
Even so, wet curtain fan cooling has non-negligible drawbacks:
1. if the greenhouse is calculated according to a square meter of 5000 square meters in the greenhouse, the volume is 30000m3If a power of 1.1KW is selected, the air flow rate is 44500m3At least 20 negative pressure fans are selected, 3 wet curtain water pumps are selected, the power consumption is 24.25KW per hour, the total power consumption is about 170KW per day according to the use duration of 7 hours per day, the total power consumption is 30600KW in half-year running time (180 days), and the running cost is high;
2. the negative pressure fans are all started, and the noise of each fan is 65dBA, so that the noise in the greenhouse is very large, and the environment of the greenhouse is influenced;
3. the temperature in the morning and the near evening, which are different at each time of the day, is not too high, the temperature in the noon and the afternoon is the highest, and if the wet curtain fan cooling device is always opened, the hottest time is most comfortable to open. The feeling of cold is in the morning and in the evening, and the feeling of hot is in the non-opening state. Therefore, a new thermostatic control system is needed to maintain a constant temperature of the greenhouse and reduce the internal noise, and to save more operation cost.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an energy-conserving cooling system of one set of constant temperature frequency conversion maintains invariable temperature, reduces internal noise, saves the running cost.
A constant-temperature frequency conversion energy-saving cooling system comprises a temperature sensor, a temperature control instrument, a frequency converter, a power box, a negative pressure fan and a cooling water curtain assembly, wherein the power box is connected with the frequency converter, the frequency converter is connected with the temperature control instrument, the temperature control instrument is connected with the temperature sensor, and the frequency converter controls the starting, the stopping and the rotating speed of the negative pressure fan; the cooling water curtain sheet assembly comprises a wet curtain water pump, a water return pipe, a water pool, a manual valve, a filter, a water feeding pipe tee joint, a flexible connecting pipe, a U-PVC pipe and a water return pipe tee joint, wherein the wet curtain water pump is arranged in the water pool, and the wet curtain water pump is connected with the manual valve, the manual valve is connected with the filter, and the filter is connected with the U-PVC pipe through hard PVC water pipes; the U-PVC pipe is connected with the soft connecting pipe through the water feeding pipe tee joint to realize water source distribution, the soft connecting pipe is connected with the upper end of the cooling water curtain piece, the lower end of the cooling water curtain piece is connected with the water return pipe tee joint, the water of the cooling water curtain piece is collected by the water return pipe tee joint and flows back to the water pool through the water return pipe, and circulation is realized.
Preferably, the temperature sensor converts the temperature signal into a 4-20mA electric signal and transmits the 4-20mA electric signal to the temperature control instrument, the temperature control instrument converts the 4-20mA electric signal into a digital signal, the digital signal is compared with a set target temperature value and then is transmitted to the frequency converter by outputting a 4-20mA electric signal, and the frequency converter outputs corresponding 0-50Hz frequency voltage according to the magnitude of the secondary electric signal.
Preferably, negative-pressure air fan sets up with cooling cascade sheet relatively, negative-pressure air fan equidistant sets up on the wall, interval 5 meters, vertical height 3.5 meters.
Preferably, the temperature sensor is arranged on a middle vertical rod of the greenhouse, and the vertical height of the temperature sensor is 2 meters.
Compared with the prior art, the utility model have following advantage:
(1) maintain the constant temperature, in summer, outdoor temperature changes along with the change of time, and indoor temperature is also so, can produce comfortable in the noon when opening wet curtain cooling equipment, towards the cold condition of feeling, adopts novel thermostatic control system, and the rotational speed of fan changes along with the change of temperature, and when indoor temperature was high, the fan rotational speed accelerated for wet curtain evaporation capacity, heat loss in the acceleration greenhouse. When the indoor temperature becomes low, the rotating speed of the fan is reduced, the evaporation capacity of the wet curtain is reduced, and the heat loss in the greenhouse is reduced, so that the constant temperature in the greenhouse can be effectively maintained.
(2) The internal noise is reduced, and the noise is reduced when the rotating speed of the fan is reduced.
(3) The running cost is saved, the power is reduced when the rotating speed of the fan is reduced, the total power consumption of one day is reduced, and the running cost is saved.
Drawings
FIG. 1 is a schematic view of a cooling water curtain sheet structure system;
FIG. 2 is a schematic structural diagram of a constant-temperature variable-frequency energy-saving cooling system.
Reference numerals:
1 a temperature sensor; 2 a temperature control instrument; 3, a frequency converter; 4, a power box; 5, a negative pressure fan; 6, a wet curtain water pump; 7, a water return pipe; 8, a water pool; 9 a manual valve; 10 a filter; 11, a water feeding pipe tee joint; 12 a soft connecting pipe; 13U-PVC pipe; and 14, a water return pipe tee joint.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs. For the reader's understanding, the device is described in terms of its orientation in fig. 2.
As shown in FIG. 1, the cooling water curtain sheet structure system comprises a wet curtain water pump 6, a water return pipe 7, a water tank 8, a manual valve 9, a filter 10, a water supply pipe tee joint 11, a soft connecting pipe 12, a U-PVC pipe 13 and a water return pipe tee joint 14. The wet curtain water pump 6 is arranged in the water pool 8, the manual valve 9 is a switch of a water path, the filter 10 is used for filtering sand and stone and impurities in the water, the U-PVC pipe 13 is a water path pipe, and the wet curtain water pump 6 is connected with the manual valve 9, the manual valve 9 is connected with the filter 10, and the filter 10 is connected with the U-PVC pipe 13 through hard PVC water pipes. The U-PVC pipe 13 is connected with the soft connecting pipe 12 through the water feeding pipe tee joint 11 to realize water source distribution, the soft connecting pipe 12 is connected with the upper end of the cooling water curtain sheet, the lower end of the cooling water curtain sheet is connected with the water return pipe tee joint 14, and the water return pipe tee joint 14 collects the water of the cooling water curtain sheet and flows back to the water pool 8 through the water return pipe 7 to realize circulation.
As shown in fig. 2, the power box 4 supplies power to the frequency converter 3, and the frequency converter 3 controls the start, stop and rotation speed of the negative pressure fan 5. The temperature sensor 1 detects the temperature in the temperature measuring room, converts the temperature signal into a 4-20mA electric signal and transmits the electric signal to the temperature control instrument 2. The temperature control instrument 2 converts the 4-20mA electric signal into a digital signal to be compared with a set target temperature value, and then the temperature control instrument 2 outputs a 4-20mA electric signal to be transmitted to the frequency converter 3. The frequency converter 3 outputs corresponding frequency voltage of 0-50Hz according to the magnitude of the secondary electric signal.
When the greenhouse temperature value is larger than the target temperature value during starting, the temperature control instrument 2 outputs a current of 20mA to be transmitted to the frequency converter 3, the frequency converter 3 generates a voltage with the frequency of 50Hz, and the negative pressure fan 5 runs at full speed. The negative pressure fan 5 operates to make the greenhouse generate negative pressure, outside air is pumped in through the cooling water curtain sheet device, water in the cooling water curtain sheet device is evaporated at an accelerated speed, and the pumped air is changed into cold air by utilizing the principle of evaporation and heat absorption, so that the purpose of cooling the greenhouse is achieved.
Along with the entering of cold air, the refrigerating capacity of the cooling water curtain sheet in the greenhouse is larger than the heating capacity of sunlight to the greenhouse, the temperature of the greenhouse is gradually reduced, the difference between the temperature and a target temperature value is also gradually reduced, when the temperature value is smaller than the target value, the electric signal output to the frequency converter 3 by the temperature control instrument 2 is reduced, the frequency of the output voltage of the frequency converter 3 is also reduced, the rotating speed of the negative pressure fan 5 is also reduced, and the power consumption of the negative pressure fan 5 is also reduced. The refrigerating capacity of the cooling water curtain sheets in the greenhouse is equal to the heating capacity of sunlight to the greenhouse, and finally the effect of dynamic balance is achieved. The temperature of the greenhouse is equal to the target temperature value.
Along with approaching to noon, the heat rising amount of sunlight to the greenhouse increases, the cooling cascade piece refrigerating capacity in the greenhouse is less than the heat rising amount of sunlight to the greenhouse, the temperature of the greenhouse rises gradually, when the greenhouse temperature value is greater than the target temperature value, the electric signal output to the frequency converter 3 by the temperature control instrument 2 increases, the frequency of the output voltage of the frequency converter 3 also increases, the rotating speed of the negative pressure fan 5 also increases, the cooling cascade piece refrigerating capacity in the greenhouse is equal to the heat rising amount of sunlight to the greenhouse, and finally the effect of dynamic balance is achieved, and the temperature of the greenhouse is equal to the target temperature value.
By the afternoon, the heating quantity of sunlight to the greenhouse is gradually reduced, the refrigerating quantity of the cooling water curtain sheets in the greenhouse is larger than the heating quantity of sunlight to the greenhouse, the greenhouse temperature value is smaller than the target temperature value, at the moment, the electric signal output to the frequency converter 3 by the temperature control instrument 2 is reduced, the frequency of the output voltage of the frequency converter 3 is also reduced, the rotating speed of the negative pressure fan 5 is also reduced, and the power consumption of the negative pressure fan 5 is reduced. The refrigerating capacity of the cooling water curtain sheets in the greenhouse is equal to the heating capacity of sunlight to the greenhouse, the effect of dynamic balance is finally achieved, and the temperature of the greenhouse is equal to the target temperature value.
The use process comprises the following steps:
the one end of greenhouse window is installed cooling cascade piece equipment, and negative-pressure air fan 5 is installed to the one end relative with it, and negative-pressure air fan 5 equidistant sets up on the wall, 5 meters in interval, vertical height 3.5 meters. Firstly, the water pool 8 is filled with water, the wet curtain water pump 6 is started, the wet curtain water pump 6 is responsible for sending the water into the U-PVC pipe 13 at the top of the wet curtain, then the water is distributed to each part of the cooling water curtain sheet through the water feeding pipe tee joint 11, the water reaches the water return pipe tee joint 14 through the cooling water curtain sheet, and the water flows back to the water pool 8 through the water return pipe 7. And the process is circulated.
The temperature sensor 1 is arranged on a vertical rod in the middle of the greenhouse, the vertical height is 2 meters, the temperature sensor 1 measures the temperature in the greenhouse, the temperature measurement value is transmitted to the temperature control instrument 2, the instrument is compared with a target value through the measurement value, then a 4-20mA current signal is output and transmitted to the frequency converter 3, the frequency converter 3 adjusts the rotating speed of the negative pressure fan 5 through the current signal, when the measurement value is larger than the target value, the frequency converter enables the negative pressure fan 5 to rotate at full speed, evaporation of water in the cooling water curtain piece device is accelerated, and therefore the refrigeration effect is achieved. And when the measured value is smaller than the target value, the frequency converter 3 enables the negative pressure fan 4 to reduce the rotating speed, the evaporation of water in the cooling water curtain piece equipment is slowed down, the refrigeration effect is slowly reduced, and the temperature of the greenhouse begins to rise again until the measured value is equal to the target value. The negative pressure fan 5 operates at a load lower than the rated load, maintaining a constant temperature and reducing internal noise as well as saving operating costs.
The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. A constant temperature frequency conversion energy-saving cooling system comprises a temperature sensor, a temperature control instrument, a frequency converter, a power box, a negative pressure fan and a cooling water curtain sheet component, and is characterized in that,
the power box is connected with the frequency converter, the frequency converter is connected with the temperature control instrument, the temperature control instrument is connected with the temperature sensor, and the frequency converter controls the starting, stopping and rotating speed of the negative pressure fan;
the cooling water curtain sheet assembly comprises a wet curtain water pump, a water return pipe, a water pool, a manual valve, a filter, a water feeding pipe tee joint, a flexible connecting pipe, a U-PVC pipe and a water return pipe tee joint, wherein the wet curtain water pump is arranged in the water pool, and the wet curtain water pump is connected with the manual valve, the manual valve is connected with the filter, and the filter is connected with the U-PVC pipe through hard PVC water pipes;
the U-PVC pipe is connected with the soft connecting pipe through the water feeding pipe tee joint to realize water source distribution, the soft connecting pipe is connected with the upper end of the cooling water curtain piece, the lower end of the cooling water curtain piece is connected with the water return pipe tee joint, the water of the cooling water curtain piece is collected by the water return pipe tee joint and flows back to the water pool through the water return pipe, and circulation is realized.
2. The constant-temperature frequency-conversion energy-saving cooling system according to claim 1, wherein the temperature sensor converts a temperature signal into a 4-20mA electric signal and transmits the 4-20mA electric signal to the temperature control instrument, the temperature control instrument converts the 4-20mA electric signal into a digital signal, the digital signal is compared with a set target temperature value, a 4-20mA electric signal is output and transmitted to the frequency converter, and the frequency converter outputs corresponding 0-50Hz frequency voltage according to the magnitude of a secondary electric signal.
3. The constant-temperature frequency-conversion energy-saving cooling system according to claim 2, wherein the negative pressure fan and the cooling water curtain sheet are arranged oppositely, and the negative pressure fan is arranged on the wall at equal intervals, at intervals of 5 meters and at a vertical height of 3.5 meters.
4. The constant-temperature frequency-conversion energy-saving cooling system according to claim 3, wherein the temperature sensor is mounted on a middle vertical rod of the greenhouse, and the vertical height of the temperature sensor is 2 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021071194.1U CN212911007U (en) | 2020-06-11 | 2020-06-11 | Constant-temperature frequency-conversion energy-saving cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021071194.1U CN212911007U (en) | 2020-06-11 | 2020-06-11 | Constant-temperature frequency-conversion energy-saving cooling system |
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| Publication Number | Publication Date |
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| CN212911007U true CN212911007U (en) | 2021-04-09 |
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| CN202021071194.1U Active CN212911007U (en) | 2020-06-11 | 2020-06-11 | Constant-temperature frequency-conversion energy-saving cooling system |
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