CN114459097A - Refrigeration system and method - Google Patents
Refrigeration system and method Download PDFInfo
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- CN114459097A CN114459097A CN202210116823.5A CN202210116823A CN114459097A CN 114459097 A CN114459097 A CN 114459097A CN 202210116823 A CN202210116823 A CN 202210116823A CN 114459097 A CN114459097 A CN 114459097A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
- F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
- F24F6/04—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using stationary unheated wet elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
- F24F6/12—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
- H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
- F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
- F24F6/04—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using stationary unheated wet elements
- F24F2006/046—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using stationary unheated wet elements with a water pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/54—Free-cooling systems
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Abstract
The disclosure provides a refrigeration system and a refrigeration method, relates to the technical field of refrigeration, and particularly relates to the technical field of indirect evaporation refrigeration. The specific implementation scheme is as follows: the refrigeration system includes: the air-air heat exchanger, the humidity sensor, the water pump, the pipeline and the humidifying equipment; the water pump is connected with a pipeline, the pipeline is connected with the humidifying equipment, and the humidity sensor is arranged between the humidifying equipment and the air-air heat exchanger; the water pump is used for injecting water into the pipeline; the pipeline is used for guiding water injected by the water pump to the humidifying equipment; the humidity sensor is used for monitoring the humidity of the humidified air between the humidifying equipment and the air-air heat exchanger and sending the humidity to the humidifying equipment; the humidifying equipment is used for adjusting the humidifying degree according to the humidity so that the humidity of the humidified air is in a preset humidity range; the air-air heat exchanger is used for realizing heat exchange between the air after humidification and the indoor air and providing cold energy for the indoor. The present disclosure enables providing cooling capacity indoors.
Description
Technical Field
The present disclosure relates to the field of refrigeration technology, and more particularly, to the field of indirect evaporative refrigeration technology.
Background
With the rapid development of cloud computing and big data technology, more centralized and large-scale data centers become mainstream, and the method has the characteristics of modular construction, short delivery cycle, high customization degree and the like. Based on this, the refrigeration system serving the environment and equipment of the data center needs to meet the requirements of energy conservation, rapid delivery, and the like.
In the prior art, most of refrigeration systems of data centers are indirect evaporative cooling ahu (air Handle unit) units, that is, flowing air inside and outside a machine room is isolated by an air-air heat exchanger, and water is directly sprayed on an air-air heat exchange core in the air-air heat exchanger, so that heat and mass exchange between outdoor air and water occurs on the heat exchange core, heat of indoor air is taken away, and the process of indirect evaporative cooling to the indoor air is completed.
Disclosure of Invention
The present disclosure provides a refrigeration system and method.
According to an aspect of the present disclosure, there is provided a refrigeration system including: the air-air heat exchanger, the humidity sensor, the water pump, the pipeline and the humidifying equipment;
the water pump is connected with the pipeline, the pipeline is connected with the humidifying equipment, and the humidity sensor is arranged between the humidifying equipment and the air-air heat exchanger;
the water pump is used for injecting water into the pipeline;
the pipeline is used for guiding the water injected by the water pump to the humidifying equipment;
the humidity sensor is used for monitoring the humidity of the humidified air between the humidifying equipment and the air-air heat exchanger and sending the humidity to the humidifying equipment;
the humidifying equipment is used for adjusting the humidifying degree according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range, wherein the precipitation amount of water of the humidified air with the humidity within the preset humidity range is smaller than a preset precipitation amount threshold value;
the air-air heat exchanger is used for realizing heat exchange between the air after humidification and the indoor air and providing cold energy for the indoor.
According to another aspect of the present disclosure, there is provided a refrigeration method applied to a refrigeration system, wherein:
injecting water into a pipeline by using a water pump, and guiding the water injected by the water pump to a humidifying device based on the pipeline;
monitoring the humidity of the humidified air between the humidifying equipment and the air-air heat exchanger by using a humidity sensor, and sending the humidity to the humidifying equipment;
adjusting the humidification degree by using humidification equipment according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range, wherein the precipitation amount of water of the humidified air with the humidity within the preset humidity range is smaller than a preset precipitation amount threshold value;
the heat exchange between the humidified air and the indoor air is realized by utilizing the air-air heat exchanger, and the cold energy is provided for the indoor.
Therefore, the refrigeration system provided by the disclosure realizes heat exchange between the humidified air and the indoor air by using the air-air heat exchanger, provides cold energy to the indoor space, monitors the humidity of the humidified air between the humidification device and the air-air heat exchanger by using the humidity sensor, and adjusts the humidification degree according to the humidity sent by the humidity sensor, so that the humidity of the humidified air is within the preset humidity range, and realizes the cold energy provision to the indoor space.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The drawings are included to provide a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
FIG. 1 is a diagram of an example of a prior art indirect evaporative cooling AHU unit configuration;
FIG. 2 is a schematic structural diagram of a first refrigeration system provided according to an embodiment of the present disclosure;
FIG. 3 is an exemplary diagram of wet film humidification provided in accordance with an embodiment of the present disclosure;
fig. 4 is an exemplary illustration of humidification by a spray humidifier provided in accordance with an embodiment of the present disclosure;
FIG. 5 is a schematic block diagram of a second refrigeration system provided in accordance with an embodiment of the present disclosure;
FIG. 6 is a schematic flow diagram of a first method of refrigeration provided in accordance with an embodiment of the present disclosure;
fig. 7 is a possible implementation manner of step S63 provided according to the embodiment of the present disclosure;
fig. 8 is another possible implementation of step S63 provided according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a second refrigeration method provided according to an embodiment of the present disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of embodiments of the present disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
In the prior art, a refrigeration system of a data center often adopts an indirect evaporative cooling ahu (air Handle unit) unit, as shown in fig. 1, an external unit is a DX (cold air system) air conditioner cold supplement system, that is, an evaporator, a compressor and a condenser are used for indoor temperature adjustment, and an internal unit directly sprays water onto an air-air heat exchange core through a water pump and a spray water system to realize indirect evaporative cooling, so that the heat of outdoor air inlet and indoor return air is reduced, the cold quantity of indoor air supply is increased, and the adjustment of indoor temperature is realized. And meanwhile, the circulation of air inside and outside the data center machine room is completed through outdoor air exhaust.
The AHU unit sprays water onto the air-air heat exchange core body, the salt content of the water remaining after the water is evaporated on the heat exchange core body is more, scales and other impurities can be generated, the scales and corrosion phenomena of the air-air heat exchanger (air-air heat exchanger) can be serious after the scales and the other impurities are separated out, the heat exchange effect is poor, the heat exchange efficiency is low, the service life of the unit can be shortened, and therefore the refrigerating system is difficult to achieve the expected use effect.
In order to solve the above problem, the present disclosure provides a refrigeration system, referring to fig. 2, in an embodiment of the present disclosure, including:
the air-air heat exchanger, the humidity sensor, the water pump, the pipeline and the humidifying equipment;
the humidifying equipment is positioned in front of an air inlet of the air-air heat exchanger, the pipeline is responsible for connecting the water pump and the humidifying equipment, and the humidity sensor is arranged between the humidifying equipment and the air-air heat exchanger.
The refrigerating system is used for providing cold energy to the indoor space so as to reduce the indoor temperature, and when the refrigerating system works, after outdoor air enters the refrigerating system, the air can pass through the humidifying equipment, and the humidifying equipment humidifies the air to obtain humidified air. The humidified air enters the air-air heat exchanger through the air inlet of the air-air heat exchanger, and then the air-air heat exchanger exchanges heat between the humidified air and the indoor air, so that cold energy is provided for the indoor to reduce the indoor temperature.
In the process, when the water pump is started, water is taken from the outside of the refrigeration system through the water pump. The water pump injects water into the pipeline after taking water, and then guides the water to the humidifying equipment through the pipeline, so that the humidifying equipment humidifies outdoor air by using the received water to obtain humidified air.
Meanwhile, a humidity sensor positioned between the humidifying equipment and the air-air heat exchanger can acquire the humidity of the air between the humidifying equipment and the air-air heat exchanger. The humidity sensor can feed the monitored humidity of the air after current humidification back to the humidification equipment in real time.
After receiving the humidity sent by the humidity sensor, the humidifying equipment adjusts the humidifying degree according to the humidity sent by the humidity sensor, so that the humidity of the air after humidification is in a preset humidity range. Namely, the humidifying equipment can judge the value of the received humidity, and if the humidity exceeds the preset humidity range, the flow of water received by the humidifying equipment through a pipeline is controlled to be reduced, so that the humidity of the humidified air is reduced; if the value of the humidity is smaller and does not reach the preset humidity range, controlling the water flow received by the pipeline in the humidifying equipment to increase so as to improve the humidity of the humidified air; if the value of the humidity is within the preset humidity range, the water flow received by the humidifying equipment through the pipeline is controlled not to change, so that the outdoor air is continuously humidified according to the humidity, and the humidified air is obtained.
The preset humidity range is a preset numerical range of air humidity, and when the value of the humidity of the humidified air is in the preset numerical range, the precipitation amount of water in the humidified air is smaller than a preset precipitation amount threshold value. The preset precipitation amount threshold is a value of a preset precipitation amount of water, and when the precipitation amount of water of the humidified air is smaller than the threshold, the air-air heat exchanger for exchanging heat between the humidified air and the indoor air in this case is less likely to generate the remaining corrosive components such as scale.
Therefore, the refrigeration system provided by the disclosure firstly utilizes the air-air heat exchanger to realize heat exchange between the humidified air and the indoor air, provides cold energy to the indoor space, and realizes indoor heat exchange refrigeration. Secondly, after the air is humidified by the humidifying equipment, the heat exchange between the humidified air and the indoor air is carried out by the air-air heat exchanger, so that the heat exchange efficiency is improved, meanwhile, the humidity of the humidified air is monitored by the humidity sensor, and the humidity is adjusted in time to enable the humidity of the humidified air to be within a preset humidity range, so that the precipitation amount of water in the humidified air is not more than a preset precipitation amount threshold value, excessive water is prevented from being analyzed out, and even the air-air heat exchange core in the air-air heat exchanger forms corrosion components such as water scales, and the like, so that the maintenance and cleaning times of the refrigerating system are reduced, and the service life of the refrigerating system is prolonged.
In one embodiment of the present disclosure, the humidifying apparatus includes: a first controller and a wet film;
the wet film may be located at a lower portion of the humidifying device and may be made of a highly water-absorptive humidifying material. After the humidifying equipment receives the water guided to the humidifying equipment by the pipeline, the water downwards permeates along the wet film under the action of gravity, and the moisture is absorbed by the wet film in the permeation process, so that an even water film is formed.
When dry outdoor air enters the humidifying equipment and penetrates through the wet film, water molecules absorb heat in the outdoor air, and reactions such as vaporization and evaporation occur, so that the humidity of the air is increased, the outdoor air is humidified, and the humidified air is obtained.
In one example, the enthalpy of the air is not changed after the humidity of the outdoor air is increased, but the temperature in the room is decreased due to the increase of the humidity of the air, and it can be considered that the outdoor air is humidified by changing along an isenthalpic line, that is, the outdoor air is cooled and humidified. The humidity of the outdoor air is increased to lower the indoor temperature, in addition to supplying the cooling energy to the indoor space through the air-air heat exchanger and cooling the indoor space.
The wet film is made of a highly water-absorbent humidifying material, and can be classified into an organic wet film, an inorganic wet film, an aluminum alloy mesh wet film, a stainless steel punched wet film, a ceramic wet film, and the like according to the difference of the constituent materials. The wet film formed by the method has the characteristics of strong water absorption, self-cleaning capability, no toxicity, acid and alkali resistance, mildew resistance, flame retardance, capability of providing the largest contact surface area between water and air and the like.
Referring to fig. 3, fig. 3 is an exemplary diagram of humidifying air by using a wet film according to an embodiment of the present disclosure, where outdoor air is humidified by the wet film to obtain humidified air, and then the humidified air is transmitted subsequently.
The first controller can adjust the water flow of the water in the pipeline entering the wet film according to the humidity sent by the humidity sensor, so that the humidity of the humidified air is within a preset humidity range. The first controller can judge the received humidity value, and if the humidity exceeds a preset humidity range, the flow of water transmitted to the wet film by the water in the control pipeline is reduced, so that the humidity of the humidified air is reduced; if the value of the humidity is smaller and does not reach the preset humidity range, controlling the water flow of the water in the pipeline transmitted to the wet film to increase, so as to improve the humidity of the humidified air; if the value of the humidity is within the preset humidity range, the water flow of the water in the control pipeline transmitted to the wet film is not changed, so that the outdoor air is continuously humidified according to the humidity, and the humidified air is obtained.
It can be seen from above that, this refrigerating system that this disclosure provided, through the wet membrane that humidifying equipment includes, carries out the humidification to outdoor air, characteristics such as hydroscopicity, self-cleaning ability, nontoxic, acid and alkali-resistance, resistant mould, fire-retardant and can provide the biggest contact surface area between moisture and the air that wet membrane has can make humidifying equipment when guaranteeing the security reliability, improve the humidification efficiency to outdoor air. And the first controller is used for adjusting the water flow rate of water in the pipeline entering the wet film in time, so that the humidity of the humidified air can be in a preset humidity range, the precipitation amount of the water of the humidified air is not more than a preset precipitation amount threshold value, excessive water is prevented from being analyzed, and even the air-air heat exchange core in the air-air heat exchanger forms scale and other corrosive components, and the service life of the refrigerating system is prolonged.
In one embodiment of the present disclosure, the humidifying apparatus includes: a first controller and a spray humidifier;
the spray humidifier can atomize water guided to the humidifying equipment by the pipeline, atomize the water to obtain atomized water drops, and directly contact the atomized water drops with outdoor air, so that the humidity of the outdoor air is increased, the outdoor air is humidified, and the humidified air is obtained.
In one example, the enthalpy of the air is not changed after the humidity of the outdoor air is increased, but the temperature in the room is decreased due to the increase of the humidity of the air, and it can be considered that the outdoor air is humidified by changing along an isenthalpic line, that is, the outdoor air is cooled and humidified. The humidity of the outdoor air is increased to lower the indoor temperature, in addition to providing the cooling capacity to the indoor space through the air-air heat exchanger and cooling the indoor space.
In one example, the spray humidifier may be a spray head, and when water is sprayed out under the pressure of the spray head, atomized water droplets are formed; the spray humidifier can also be a centrifugal atomizer, and atomized water drops can be formed after water comes out of the centrifugal atomizer under the action of centrifugal force.
Referring to fig. 4, fig. 4 is an exemplary diagram of humidifying air by using a spray humidifier according to an embodiment of the present disclosure, where outdoor air is humidified by a wet film to obtain humidified air, and then the humidified air is subsequently transmitted.
The first controller can adjust the water flow of the water in the pipeline entering the spray humidifier according to the humidity sent by the humidity sensor, so that the humidity of the humidified air is within a preset humidity range. The first controller can judge the received humidity value, and if the humidity exceeds a preset humidity range, the water flow of the water in the control pipeline transmitted to the spray humidifier is reduced, so that the humidity of the humidified air is reduced; if the value of the humidity is smaller and does not reach the preset humidity range, controlling the water flow of the water in the pipeline transmitted to the spray humidifier to increase, so as to improve the humidity of the humidified air; if the value of the humidity is within the preset humidity range, the water flow of the water in the control pipeline transmitted to the spray humidifier is not changed, so that the outdoor air is continuously humidified according to the humidity, and the humidified air is obtained.
Therefore, the refrigeration system provided by the disclosure atomizes water into atomized water drops through the atomizing humidifier included in the humidifying device, directly humidifies outdoor air, and can improve the humidifying efficiency of the outdoor air. And the first controller is used for adjusting the water flow rate of water in the pipeline entering the wet film in time, so that the humidity of the humidified air can be in a preset humidity range, the precipitation amount of the water of the humidified air is not more than a preset precipitation amount threshold value, excessive water is prevented from being analyzed, and even the air-air heat exchange core in the air-air heat exchanger forms scale and other corrosive components, and the service life of the refrigerating system is prolonged.
In one embodiment of the present disclosure, the system further comprises: a temperature sensor and a second controller;
the temperature sensor measures the current indoor temperature and sends the measured indoor temperature to the second controller. The temperature measured by the temperature sensor may be a dry bulb temperature measured by a dry bulb thermometer, i.e. a temperature measured by a dry bulb thermometer freely exposed to indoor air, while it avoids interference from radiation and moisture.
The second controller may determine the received current indoor temperature. As mentioned above, the humidification of the humidification device to the outdoor air is cooling humidification, that is, when the water pump and the humidification device are turned on, the refrigeration system is operated by the humidification device and the air-air heat exchanger together to cool the indoor air.
Therefore, when the indoor temperature is lower than the preset room temperature threshold value, the current indoor cold quantity is sufficient, and strong refrigeration and temperature reduction are not needed, the second controller is used for turning off the water pump and the humidifying equipment. After the water pump and the humidifying equipment are closed, outdoor air is not humidified any more, but is directly subjected to heat exchange with indoor air through the air-air heat exchanger, and at the moment, the refrigerating system only provides cold energy for the indoor through the air-air heat exchanger; when the indoor temperature is not lower than the preset room temperature threshold value, the current indoor cold quantity is insufficient, and strong refrigeration cooling is needed, the second controller is used for starting the water pump and the humidifying equipment. After the water pump and the humidifying equipment are started, outdoor air is firstly cooled and humidified to obtain humidified air, the humidified air is subjected to heat exchange with indoor air through the air-air heat exchanger, and at the moment, the refrigerating system provides cold energy for the indoor space through the humidifying equipment and the air-air heat exchanger.
The preset room temperature threshold is a preset temperature value required for cooling indoor strong refrigeration. In one example, the preset room temperature threshold may be a room temperature value 13 ℃ (celsius) below the room supply air temperature.
It can be seen from above that, the refrigerating system that this disclosure provided in time measures indoor current temperature through temperature sensor to judge whether current indoor temperature is less than preset room temperature threshold value through the second controller, thereby judge whether need open water pump and humidification equipment and carry out the humidification to outdoor air, when guaranteeing that indoor temperature is up to standard, can practice thrift the resource of refrigerating system function, avoid causing the wasting of resources.
In one embodiment of the present disclosure, referring to fig. 5, the refrigeration system further comprises: an auxiliary refrigeration subsystem;
when the cold quantity provided by the air-air heat exchanger to the indoor is lower than the preset cold quantity threshold value, the refrigeration system can start the auxiliary refrigeration subsystem, so that the auxiliary refrigeration subsystem enters a refrigeration state to provide the cold quantity to the indoor.
When the water pump and the humidifying device are turned on, the cooling system cools the room by the humidifying device and the cooling capacity provided by the air-air heat exchanger to the room. And under the condition that the water pump and the humidifying equipment are started, if the cold quantity provided by the humidifying equipment and the air-air heat exchanger to the indoor is lower than a preset cold quantity threshold value, the refrigerating system can start the auxiliary refrigerating subsystem, so that the auxiliary refrigerating subsystem enters a refrigerating state, and provides cold quantity to the indoor together with the humidifying equipment and the air-air heat exchanger to take away residual heat in the indoor after being cooled by the humidifying equipment and the air-air heat exchanger.
Under the condition that the water pump and the humidifying equipment are closed, if the cold quantity provided by the air-air heat exchanger to the indoor space is lower than a preset cold quantity threshold value, the refrigerating system can start the auxiliary refrigerating subsystem, so that the auxiliary refrigerating subsystem enters a refrigerating state, and provides cold quantity to the indoor space together with the air-air heat exchanger, and takes away residual heat in the indoor space after being cooled by the air-air heat exchanger.
The preset cold threshold value can indicate the content of indoor cold, for example, when the preset cold threshold value is 100%, it indicates that all indoor heat is converted into cold. When the cold quantity is lower than the value, the cold quantity provided by the air-air heat exchanger to the indoor is insufficient, and at the moment, the auxiliary refrigeration subsystem enters a refrigeration state to provide the cold quantity to the indoor and take away the residual heat.
In one example, the auxiliary refrigeration subsystem can be a DX air conditioning refrigeration system.
In an embodiment of the present disclosure, the refrigeration system includes an indoor unit and an outdoor unit, the air-air heat exchanger, the water pump, the pipeline, the humidification device, the humidity sensor, and the temperature sensor are located in the indoor unit of the refrigeration system, and the auxiliary refrigeration subsystem is located in the outdoor unit of the refrigeration system.
In one example, the refrigeration system may further include components such as a cabinet structure, an access door, an access light and access section, an indoor fan, an outdoor fan, an air filter, an electrical cabinet, and a sensor.
Therefore, the refrigeration system provided by the disclosure can start the auxiliary refrigeration subsystem when the cold quantity provided by the air-air heat exchanger to the indoor is insufficient, so that the auxiliary refrigeration subsystem enters a refrigeration state to provide the cold quantity to the indoor, and the indoor refrigeration and cooling efficiency is improved. In addition, the air-air heat exchanger, the water pump, the pipeline, the humidifying equipment, the humidity sensor and the temperature sensor are arranged in an indoor unit of the refrigerating system, and the auxiliary refrigerating subsystem is arranged in an outdoor unit of the refrigerating system, so that the space utilization rate of the refrigerating system can be improved, and the usability of the refrigerating system is further improved.
The present disclosure provides a schematic flow diagram of a refrigeration method for use in the refrigeration system of fig. 2, see fig. 6, the method comprising:
step S61: when the water pump is turned on, water is taken from the outside of the refrigeration system through the water pump. The water pump takes water and injects the water into the pipeline, and then the water is guided to the humidifying equipment through the pipeline.
Step S62: the humidity of the air between the humidifying equipment and the air-air heat exchanger is collected by a humidity sensor positioned between the humidifying equipment and the air-air heat exchanger. The humidity sensor can feed the monitored humidity of the air after current humidification back to the humidification equipment in real time.
Step S63: after the humidifying equipment receives the humidity sent by the humidity sensor, the humidifying equipment is used for adjusting the humidifying degree according to the humidity sent by the humidity sensor, so that the humidity of the humidified air is in a preset humidity range.
Namely, the humidifying equipment can judge the value of the received humidity, and if the humidity exceeds the preset humidity range, the flow of water received by the humidifying equipment through a pipeline is controlled to be reduced, so that the humidity of the humidified air is reduced; if the value of the humidity is smaller and does not reach the preset humidity range, controlling the water flow received by the pipeline in the humidifying equipment to increase so as to improve the humidity of the humidified air; if the value of the humidity is within the preset humidity range, the water flow received by the humidifying equipment through the pipeline is controlled not to change, so that the outdoor air is continuously humidified according to the humidity, and the humidified air is obtained.
Step S64: the humidified air enters the air-air heat exchanger through the air inlet of the air-air heat exchanger, and then the air-air heat exchanger is used for exchanging heat between the humidified air and the indoor air, so that cold energy is provided for the indoor space to reduce the indoor temperature.
Therefore, the refrigeration method provided by the disclosure firstly utilizes the air-air heat exchanger to realize heat exchange between the humidified air and the indoor air, provides cold energy for the indoor space, and realizes indoor heat exchange refrigeration. Secondly, after the air is humidified by the humidifying equipment, the humidified air is subjected to heat exchange with indoor air by the air-air heat exchanger, so that the heat exchange efficiency is improved, meanwhile, the humidity of the humidified air is monitored by the humidity sensor, and the humidity is adjusted in time so that the humidity of the humidified air is within a preset humidity range, so that the precipitation amount of water in the humidified air is not more than a preset precipitation amount threshold value, excessive water precipitation is avoided, and corrosion components such as scale and the like formed on an air-air heat exchange core in the air-air heat exchanger are prevented, so that the maintenance and cleaning times of the refrigerating system are reduced, and the service life of the refrigerating system is prolonged.
In one possible embodiment, as shown in fig. 3, the humidifying apparatus comprises: a first controller and a wet film. Referring to fig. 7, the step S63 of adjusting the humidification degree by the humidification apparatus according to the humidity sent by the humidity sensor so that the humidity of the humidified air is within the preset humidity range includes:
step S71: after the humidifying equipment receives the water guided to the humidifying equipment by the pipeline, the water permeates downwards along the wet film under the action of gravity, and the moisture is absorbed by the wet film in the permeating process, so that an even water film is formed.
When dry outdoor air enters the humidifying equipment and penetrates through the wet film, water molecules in the wet film absorb heat in the outdoor air, so that reactions such as vaporization, evaporation and the like are carried out on the water, the humidity of the air is increased, the outdoor air is humidified, and the humidified air is obtained.
Step S72: the first controller can adjust the water flow of the water in the pipeline entering the wet film according to the humidity sent by the humidity sensor, so that the humidity of the humidified air is within a preset humidity range.
Judging the received humidity value by using a first controller, and if the humidity exceeds a preset humidity range, controlling the water flow of water in a pipeline transmitted to a wet film to be reduced so as to reduce the humidity of the humidified air; if the value of the humidity is smaller and does not reach the preset humidity range, controlling the water flow of the water in the pipeline transmitted to the wet film to increase, so as to improve the humidity of the humidified air; if the value of the humidity is within the preset humidity range, the water flow of the water in the control pipeline transmitted to the wet film is not changed, so that the outdoor air is continuously humidified according to the humidity, and the humidified air is obtained.
Therefore, the refrigeration method provided by the disclosure humidifies outdoor air through the wet film included by the humidifying equipment, and the wet film has the characteristics of water absorbability, self-cleaning capability, no toxicity, acid and alkali resistance, mildew resistance, flame retardance, capability of providing the largest contact surface area between moisture and air and the like, so that the humidifying equipment can improve the humidifying efficiency of the outdoor air while ensuring the safety and reliability. And the first controller is used for adjusting the water flow rate of water in the pipeline entering the wet film in time, so that the humidity of the humidified air can be in a preset humidity range, the precipitation amount of the water of the humidified air is not more than a preset precipitation amount threshold value, excessive water is prevented from being analyzed, and even the air-air heat exchange core in the air-air heat exchanger forms scale and other corrosive components, and the service life of the refrigerating system is prolonged.
In one possible embodiment, as shown in fig. 4, the humidifying apparatus includes: first controller and spraying humidifier. Referring to fig. 8, the step S63 of adjusting the humidification degree by the humidification apparatus according to the humidity sent by the humidity sensor so that the humidity of the humidified air is within the preset humidity range includes:
step S81: the water guide to the humidifying equipment can be atomized based on the spray humidifier, atomized water drops are obtained by atomizing the water, and then the atomized water drops are directly contacted with outdoor air, so that the humidity of the outdoor air is increased, the outdoor air is humidified, and the humidified air is obtained.
Step S82: the first controller can adjust the water flow of the water in the pipeline entering the spray humidifier according to the humidity sent by the humidity sensor, so that the humidity of the humidified air is within a preset humidity range.
The first controller can be used for judging the received humidity value, and if the humidity exceeds a preset humidity range, the water flow of water in the control pipeline transmitted to the spray humidifier is reduced, so that the humidity of the humidified air is reduced; if the value of the humidity is smaller and does not reach the preset humidity range, controlling the water flow of the water in the pipeline transmitted to the spray humidifier to increase, so as to improve the humidity of the humidified air; if the value of the humidity is within the preset humidity range, the water flow of the water in the control pipeline transmitted to the spray humidifier is not changed, so that the outdoor air is continuously humidified according to the humidity, and the humidified air is obtained.
Therefore, the refrigeration method provided by the disclosure atomizes water into atomized water drops through the atomizing humidifier included in the humidification device, directly humidifies outdoor air, and can improve the humidification efficiency of the outdoor air. And the first controller is used for adjusting the water flow rate of water in the pipeline entering the wet film in time, so that the humidity of the humidified air can be in a preset humidity range, the precipitation amount of the water of the humidified air is not more than a preset precipitation amount threshold value, excessive water is prevented from being analyzed, and even the air-air heat exchange core in the air-air heat exchanger forms scale and other corrosive components, and the service life of the refrigerating system is prolonged.
In one embodiment of the present disclosure, the refrigeration system further comprises: a temperature sensor and a second controller, see fig. 9, the method further comprising:
step S91: and measuring the current indoor temperature by using the temperature sensor, and sending the indoor temperature obtained by measurement to the second controller. The temperature measured by the temperature sensor may be a dry bulb temperature measured by a dry bulb thermometer, i.e. a temperature measured by a dry bulb thermometer freely exposed to indoor air, while it avoids interference from radiation and moisture.
Step S92: the second controller may determine the received current indoor temperature. The humidifying device humidifies outdoor air into cooling and humidifying, namely when the water pump and the humidifying device are started, the refrigerating system is operated by the humidifying device and the air-air heat exchanger together to cool the indoor space.
Therefore, when the indoor temperature is lower than the preset room temperature threshold value, the current indoor cold quantity is sufficient, and strong refrigeration and temperature reduction are not needed, the second controller is used for turning off the water pump and the humidifying equipment. After the water pump and the humidifying equipment are closed, outdoor air is not humidified any more, but is directly subjected to heat exchange with indoor air through the air-air heat exchanger, and at the moment, the refrigerating system only provides cold energy for the indoor through the air-air heat exchanger; when the indoor temperature is not lower than the preset room temperature threshold value, the current indoor cold quantity is insufficient, and strong refrigeration cooling is needed, the second controller is used for starting the water pump and the humidifying equipment. After the water pump and the humidifying equipment are started, outdoor air is firstly cooled and humidified to obtain humidified air, the humidified air is subjected to heat exchange with indoor air through the air-air heat exchanger, and at the moment, the refrigerating system provides cold energy for the indoor space through the humidifying equipment and the air-air heat exchanger together
Therefore, according to the refrigeration method provided by the disclosure, the indoor current temperature is measured in time through the temperature sensor, and whether the current indoor temperature is lower than the preset room temperature threshold value is judged through the second controller, so that whether the water pump and the humidification equipment need to be started to humidify outdoor air is judged, the resources of operation of the refrigeration system can be saved while the indoor temperature is ensured to reach the standard, and the resource waste is avoided.
In one embodiment of the present disclosure, as shown in fig. 5, the refrigeration system further includes: the auxiliary refrigeration subsystem, the method further comprising:
when the cold quantity provided by the air-air heat exchanger to the indoor is lower than the preset cold quantity threshold value, the auxiliary refrigeration subsystem can be started, and the auxiliary refrigeration subsystem in the refrigeration state is utilized to provide the cold quantity to the indoor.
Under the condition that the water pump and the humidifying equipment are started, if the cold quantity provided by the humidifying equipment and the air-air heat exchanger to the indoor is lower than a preset cold quantity threshold value, the auxiliary refrigeration subsystem can be started, the auxiliary refrigeration subsystem entering the refrigeration state is utilized to provide the cold quantity to the indoor together with the humidifying equipment and the air-air heat exchanger, and the residual heat in the indoor after being cooled by the humidifying equipment and the air-air heat exchanger is taken away.
Under the condition that the water pump and the humidifying equipment are closed, if the cold quantity provided by the air-air heat exchanger to the indoor is lower than the preset cold quantity threshold value, the auxiliary refrigeration subsystem can be started, the auxiliary refrigeration subsystem entering the refrigeration state and the air-air heat exchanger are utilized to provide the cold quantity to the indoor together, and the residual heat in the indoor after being cooled by the air-air heat exchanger is taken away.
Therefore, according to the refrigeration method provided by the disclosure, when the cold quantity provided by the air-air heat exchanger to the indoor is insufficient, the auxiliary refrigeration subsystem can be started to enter the refrigeration state to provide the cold quantity to the indoor, so that the indoor refrigeration and cooling efficiency is improved.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (11)
1. A refrigeration system comprising: the air-air heat exchanger, the humidity sensor, the water pump, the pipeline and the humidifying equipment;
the water pump is connected with the pipeline, the pipeline is connected with the humidifying equipment, and the humidity sensor is arranged between the humidifying equipment and the air-air heat exchanger;
the water pump is used for injecting water into the pipeline;
the pipeline is used for guiding the water injected by the water pump to the humidifying equipment;
the humidity sensor is used for monitoring the humidity of the humidified air between the humidifying equipment and the air-air heat exchanger and sending the humidity to the humidifying equipment;
the humidifying equipment is used for adjusting the humidifying degree according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range, wherein the precipitation amount of water of the humidified air with the humidity within the preset humidity range is smaller than a preset precipitation amount threshold value;
the air-air heat exchanger is used for realizing heat exchange between the air after humidification and the indoor air and providing cold energy for the indoor.
2. The system of claim 1, the humidifying device comprising: a first controller and a wet film;
the wet film is used for absorbing the water guided to the humidifying equipment by the pipeline to form a water film, so that the outdoor air is humidified by penetrating through the water film to obtain humidified air;
and the first controller is used for adjusting the water flow of the water in the pipeline entering the wet film according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range.
3. The system of claim 1, the humidifying device comprising: a first controller and a spray humidifier;
the spray humidifier is used for atomizing the water guided to the humidifying equipment by the pipeline to obtain atomized water drops, enabling the atomized water drops to be in contact with the outdoor air, and humidifying the outdoor air to obtain humidified air;
and the first controller is used for adjusting the water flow of the water in the pipeline entering the spray humidifier according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range.
4. The system of claim 1, further comprising: a temperature sensor and a second controller;
the temperature sensor is used for measuring indoor temperature and sending the temperature to the second controller;
the second controller is used for turning off the water pump and the humidifying equipment when the indoor temperature is lower than a preset indoor temperature threshold; and when the indoor temperature is not lower than a preset room temperature threshold value, starting the water pump and the humidifying equipment.
5. The system of claim 4, the refrigeration system further comprising: an auxiliary refrigeration subsystem;
and the auxiliary refrigeration subsystem is used for entering a refrigeration state to provide cold energy to the indoor when the cold energy provided by the air-air heat exchanger to the indoor is lower than a preset cold energy threshold value.
6. The system of claim 5, the refrigeration system comprising an indoor unit and an outdoor unit, wherein:
the air-air heat exchanger, the water pump, the pipeline, the humidifying equipment, the humidity sensor and the temperature sensor are positioned in an indoor unit of the refrigerating system, and the auxiliary refrigerating subsystem is positioned in an outdoor unit of the refrigerating system.
7. A method of refrigeration, applied to a refrigeration system, wherein:
injecting water into a pipeline by using a water pump, and guiding the water injected by the water pump to a humidifying device based on the pipeline;
monitoring the humidity of the humidified air between the humidifying equipment and the air-air heat exchanger by using a humidity sensor, and sending the humidity to the humidifying equipment;
adjusting the humidification degree by using humidification equipment according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range, wherein the precipitation amount of water of the humidified air with the humidity within the preset humidity range is smaller than a preset precipitation amount threshold value;
the heat exchange between the humidified air and the indoor air is realized by utilizing the air-air heat exchanger, and the cold energy is provided for the indoor.
8. The method of claim 7, the humidifying apparatus comprising: the first controller and the wet film, the degree of adjusting the humidification according to the humidity sent by the humidity sensor by the humidifying equipment so that the humidity of the air after humidification is in a preset humidity range, comprising:
absorbing the water guided to the humidifying equipment by the pipeline based on the wet film to form a water film, so that the outdoor air is humidified by penetrating through the water film to obtain humidified air;
and adjusting the water flow of the water in the pipeline into the wet film by using the first controller according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range.
9. The method of claim 7, the humidifying apparatus comprising: the first controller and the spray humidifier, the degree of humidification is adjusted by the humidifying equipment according to the humidity sent by the humidity sensor, so that the humidity of the air after humidification is in a preset humidity range, comprising:
atomizing the water guided to the humidifying equipment by the pipeline based on the spray humidifier to obtain atomized water drops, and enabling the atomized water drops to be in contact with the outdoor air to humidify the outdoor air to obtain humidified air;
and adjusting the water flow of the water in the pipeline into the spray humidifier by using the first controller according to the humidity sent by the humidity sensor so as to enable the humidity of the humidified air to be within a preset humidity range.
10. The method of claim 7, the refrigeration system further comprising: a temperature sensor and a second controller, the method further comprising:
measuring an indoor temperature with the temperature sensor and sending the temperature to the second controller;
utilizing the second controller to close the water pump and the humidifying equipment when the indoor temperature is lower than a preset room temperature threshold; and when the indoor temperature is not lower than a preset room temperature threshold value, starting the water pump and the humidifying equipment.
11. The method of claim 10, the refrigeration system further comprising: an auxiliary refrigeration subsystem, the method further comprising:
and when the cold quantity provided by the air-air heat exchanger to the indoor space is lower than a preset cold quantity threshold value, the auxiliary refrigeration subsystem enters a refrigeration state to provide the cold quantity to the indoor space.
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