CN110793133A - Energy-saving temperature and humidity control device with variable air volume and air supply mode thereof - Google Patents

Energy-saving temperature and humidity control device with variable air volume and air supply mode thereof Download PDF

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Publication number
CN110793133A
CN110793133A CN201910769699.0A CN201910769699A CN110793133A CN 110793133 A CN110793133 A CN 110793133A CN 201910769699 A CN201910769699 A CN 201910769699A CN 110793133 A CN110793133 A CN 110793133A
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Prior art keywords
temperature
air
humidity
branch
air volume
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CN201910769699.0A
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Chinese (zh)
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徐鹏华
徐新杰
麦新有
来幼花
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Guangdong Shenling Environmental Systems Co Ltd
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Guangdong Shenling Environmental Systems Co Ltd
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Priority to CN201910769699.0A priority Critical patent/CN110793133A/en
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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
    • F24F5/001—Compression cycle type
    • 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
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • 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
    • 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
    • F24F2110/12—Temperature of the outside air
    • 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
    • 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
    • F24F2110/22—Humidity of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to the technical field of air conditioning equipment, and provides a variable air volume energy-saving type temperature and humidity control device for solving the problems of inaccurate and timely temperature and humidity regulation and insufficient energy conservation in a control process. Compared with the prior art, its beneficial effect lies in: the variable air volume energy-saving type temperature and humidity control device provided by the invention effectively realizes the functions of temperature adjustment and dehumidification, is accurate in adjustment process, and effectively reduces energy consumption by utilizing condensation heat and energy-saving energy to mix with second branch air to adjust indoor temperature and humidity.

Description

Energy-saving temperature and humidity control device with variable air volume and air supply mode thereof
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a multivariable energy-saving type temperature and humidity independent control device and an air supply mode thereof
Background
The air-conditioning products of the prior air-conditioner which can realize temperature and humidity control generally comprise the following two types: constant temperature and humidity air conditioner, temperature regulating dehumidifier.
The constant temperature and humidity machine adopts one or more constant volume compressors, controls the temperature or the humidity of a room by starting and stopping the compressors, can not control the temperature and the humidity simultaneously because the compressors can not control the temperature and the humidity simultaneously, only can one of indexes be preferentially adopted, and causes that the temperature and humidity precision is not high.
In temperature-adjusting dehumidification, the dehumidifier controls the start and stop of the compressor by relative humidity, the compressor stops running after the set humidity is reached, the temperature control of the temperature-adjusting dehumidifier is controlled by adjusting the condensation heat of the reheating condenser, the compressor does not have the condensation heat after the compressor stops running, namely the temperature rise of the supplied air does not exist, and the temperature of a room cannot be stabilized at the moment.
More importantly, for some occasions such as rooms, when the heat and humidity load is large, the condition of variable working conditions such as fresh air and the like needs to be introduced, particularly, the underground engineering with limited use occasions and no water source is adopted, and the common air conditioner has obvious inadaptability.
In order to improve the adaptability of the air conditioner and achieve the purpose of energy conservation, the air conditioner adopting variable air volume control is available at present, namely the temperature and humidity in a room are controlled by introducing fresh air into the room, but the control method is relatively complex, and the achievable effect is also poor, such as: chinese patent CN201210239255.4 discloses a temperature and humidity control device and method for variable air volume air conditioning system, which adjusts indoor temperature and humidity by introducing mixed post-treatment of outdoor fresh air and indoor circulating air, and this way reduces energy consumption to a certain extent, and the mixed state of fresh air and circulating air at every turn can be changed, and needs to be adjusted by multiple cycles to meet the requirement, and cannot realize the adjustment of indoor temperature and humidity in time, therefore, cannot satisfy the high-precision situation of temperature and humidity control, such as: precision machine processing industry, medicinal food industry, textile industry, tobacco industry, etc.
Disclosure of Invention
The invention aims to overcome at least one defect in the prior art and provides a variable air volume energy-saving temperature and humidity control device which is used for solving the problems that temperature and humidity adjustment is not accurate and timely, and the control process is not energy-saving enough.
In addition, the invention also aims to provide an air supply mode of the variable air volume energy-saving type temperature and humidity control device, so that timely and accurate indoor temperature and humidity adjustment is realized, and the control process is energy-saving.
The technical scheme adopted by the invention is as follows:
a variable air volume energy-saving temperature and humidity control device comprises a first temperature and humidity detection device for detecting indoor temperature and humidity, a second temperature and humidity detection device for detecting the temperature and humidity of outdoor air entering the room, a shunting device for dividing the outdoor air entering the room into first branch air and second branch air, a circulating regulation system for dehumidifying and regulating the temperature of the first branch air, a nozzle device for feeding the second branch air into the room to be mixed with the processed first branch air, and a central control system electrically connected with the first branch air and the second branch air; the circulation regulating system comprises a compressor, a condenser, an expansion valve and an evaporator which form a refrigeration cycle process, wherein the evaporator enables a first branch to be cooled and dehumidified, and the condenser enables the first branch to be heated and warmed after cooling and dehumidification. Specifically, the variable air volume energy-saving type temperature and humidity control device provided by the invention further comprises a blower for sending the processed first branch air into a room. According to the invention, outdoor air is introduced and divided into two paths, the first branch air is adjusted by the circulation adjusting device, the second branch air enters the room and is mixed with the first branch air to adjust the indoor temperature and humidity, the proportion of the first branch air and the second branch air and the degree of adjustment of the first branch air can be adjusted and controlled according to the current indoor temperature and humidity and the temperature and humidity condition of the introduced outdoor air, the indoor temperature and humidity can be directly controlled, in the process of processing the first branch air, the first branch air is cooled and dehumidified by the evaporator, then the first branch air is heated and warmed by the condensation heat emitted by the condenser, the temperature and dehumidification function is finally achieved, the adjusting process is accurate, and the energy-saving energy of the condensation heat is utilized to mix with the second branch air to adjust the indoor temperature and humidity, so that the energy consumption is effectively reduced.
It should be noted that, because there are many devices separately used for air humidification in the market at present, and the effect is good, the present invention is mainly used for solving the problems of indoor environment dehumidification and temperature regulation, and therefore, a device for increasing indoor humidity is not provided in the variable air volume energy-saving type temperature and humidity control device.
Further, the energy-saving temperature and humidity control device with variable air volume further comprises a water circulation system for adjusting the temperature and the humidity of the first branch air, the water circulation system is electrically connected with the central control system, and the water circulation system comprises a surface cooling coil pipe for cooling and dehumidifying the first branch air, a water pump for circulating water and a heating coil pipe for heating the first branch air after cooling and dehumidifying. Specifically, still be equipped with first water filter, relief valve, hydrologic cycle stop valve and expansion drum between table cold coil and the heating coil, water circulating system still includes automatic water supply device and automatic drainage device, automatic water supply device includes second water filter, hand valve and automatic water supply valve, automatic drainage device includes the drain valve.
The first branch wind enters the surface cooling coil of the water circulation system to be precooled and cooled, the water side of the heating coil of the water circulation system absorbs heat to heat, the water resistance of the water in the water circulation system is overcome by the water pump, the water reaches the heating coil of the water circulation system through the first water filter, the safety valve, the water circulation stop valve and the expansion tank, the air is heated and recovered by the drain valve arranged in the water circulation system and the automatic water replenishing valve, the hand valve and the second water filter, and then the air returns to the surface cooling coil of the water circulation system, the exhaust valve is arranged at the top of the whole system, and the system is provided with the automatic water replenishing device and the automatic water draining device.
According to the invention, the water circulation system has a function similar to that of the circulation regulation system, firstly, the first branch wind is cooled and dehumidified, and then the first branch wind after cooling and dehumidification is heated and warmed, the water circulation system can be used independently, is used under the condition of small temperature and humidity regulation amplitude, and can also be used in parallel with the circulation regulation system, so that the cooling coil is adjacent to the evaporator, the first branch wind is cooled and dehumidified in two steps, the heating coil is in parallel with the condenser, and the first branch wind after cooling and dehumidification is heated and warmed in two steps. When the water circulation system and the circulation adjusting system are used in parallel, first branch air enters the energy-saving variable air volume temperature and humidity control device from the outside, is precooled, cooled and dehumidified by the surface cooling coil, is deeply cooled and dehumidified by the evaporator, enters the heating coil for heating and warming, and finally enters the condenser for heating and warming to meet the adjusting requirement; on the other hand, the water circulation system is adopted to reinforce the adjusting function of the circulation adjusting system, so that the energy consumption of the circulation adjusting system is reduced, and the energy-saving effect is achieved.
Furthermore, the variable air volume energy-saving type temperature and humidity control device further comprises an electric heater connected with the evaporator and/or the heating coil, and the heater is electrically connected with the central control device. According to the invention, by arranging the electric heater, when the heating capability of the heating coil and the evaporator on the first branch wind is insufficient or cannot be used, the electric heater is used for further heating and warming, so that the first branch wind after treatment can reach a qualified state, and the indoor temperature and humidity can be controlled more accurately.
Further, the condenser includes air-cooled condenser and water-cooled condenser, the water-cooled condenser is used for making the refrigerant that comes out from the compressor absorb partial condensation heat load, air-cooled condenser is used for absorbing remaining refrigerant condensation heat load, heats up the air simultaneously. It should be noted that, if only one condenser is arranged, the first branch air heating and warming air-cooled condenser can be directly adopted; the water-cooled condenser can be replaced by an air-cooled condenser arranged outdoors, and the water-cooled condenser is arranged in the invention to pre-cool high-temperature and high-pressure liquid entering the air-cooled condenser, so that the air quantity of the first branch air cooling fan can be steplessly adjusted.
Furthermore, a first preheating channel is arranged between the outlet of the compressor and the outlet of the expansion valve, the first channel comprises a first stop valve for adjusting on-off and a first regulating valve for adjusting opening degree, and the first stop valve and the first regulating valve are electrically connected with the central control system. Specifically, the first regulating valve adopts an electromagnetic valve, in the invention, the outlet of the compressor can be connected to the outlet of the expansion valve, the electromagnetic valve and the first stop valve are arranged in the middle, the electromagnetic valve is opened, so that the refrigerant in a high-temperature and high-pressure liquid state coming out of the compressor can be mixed with the normal-temperature and low-pressure liquid coming out of the expansion valve, the refrigerant which is about to enter the evaporator is preheated and heated, the heat released by the evaporation of the refrigerant in the evaporator is reduced, and the degree of cooling and dehumidifying of the first branch air by the evaporator is reduced; the degree of preheating and heating of the refrigerant entering the evaporator is adjusted by changing the opening degree of the electromagnetic valve and controlling the mixing proportion, so that the degree of cooling and dehumidifying of the first branch air by the evaporator is controlled, and the temperature and humidity control and adjustment in the invention are more comprehensive and accurate.
Furthermore, a second preheating channel is arranged between the outlet of the water-cooled condenser and the inlet of the expansion valve, the second preheating channel comprises a second regulating valve used for regulating the opening degree, and the second regulating valve is electrically connected with the central control system. Specifically, the second regulating valve adopts an electromagnetic valve, and a second preheating channel is arranged between the outlet of the water-cooled condenser and the inlet of the expansion valve, so that a refrigerant of a slightly lower high-temperature and high-pressure liquid which is discharged from the compressor after being preliminarily preheated by the water-cooled condenser is mixed with a normal-temperature liquid which is about to enter the expansion valve, the temperature of the refrigerant entering the evaporator is regulated, the degree of temperature reduction and dehumidification of the first branch air by the evaporator is further controlled, and the temperature and humidity control in the invention realizes stepless regulation.
Further, a gas-liquid separator is arranged between the evaporator and the compressor, and the gas-liquid separator is used for filtering out liquid refrigerant coming out of the evaporator. Specifically, because the power of the evaporator and the influence of the actual working condition of the evaporator, the refrigerant coming out of the evaporator cannot completely reach a gas state.
Further, the energy-saving variable air volume temperature and humidity control device further comprises an air filter screen arranged in front of the flow dividing device, and the air filter device is used for filtering impurities in outdoor air and avoiding damage to the energy-saving variable air volume temperature and humidity control device.
Further, the variable air volume energy-saving temperature and humidity control device further comprises a pressure balancing device electrically connected with the central control system, the pressure balancing device comprises a first pressure controller, a second pressure controller and a two-way valve, the first pressure controller, the second pressure controller and the two-way valve are electrically connected with the compressor, the two-way valve is arranged at the outlet of the water-cooled condenser, the set value of the first pressure controller is a lower allowable condensing pressure limit, the set value of the second pressure controller is an upper allowable condensing pressure limit, and the first pressure controller and the second pressure controller are used for adjusting the pressure of the system by controlling the opening degree of the two-way valve. In order to realize the pressure stabilization in the circulation adjusting system, particularly at the position of a compressor, the invention is provided with a pressure balancing device which is electrically connected with the central control system.
Specifically, the pressure balancing device comprises two pressure controllers and a two-way water valve, the set values of the pressure controllers are respectively an upper limit value and a lower limit value allowed by the condensing pressure, and when the condensing pressure is at the upper limit value allowed by the pressure, the two pressure controllers simultaneously feed back two 'on' signals or two 'off' signals to control the water valve and close the small water valve; when the condensing pressure is between the upper limit value and the lower limit value of the pressure allowance, the two pressure controllers simultaneously feed back an on signal and an off signal to control the water valve, and the water valve is stable; when the condensing pressure is at the lower limit of the pressure allowable value, the two pressure controllers simultaneously feed back two 'off' signals or two 'on' signals to control the water valve, and open the large water valve to keep the system pressure stable.
Further, the nozzle device comprises a plurality of nozzles and an automatic switch cantilever device arranged on the nozzles, the automatic switch cantilever device is used for opening or closing the nozzles to adjust the air volume of the second branch air, and the automatic switch cantilever device is electrically connected with the central control system. In order to realize energy-saving control of variable air volume, outdoor air is introduced and divided into two paths, a circulating adjusting device is adopted to adjust first branch air, second branch air enters the room and is mixed with the first branch air to achieve the mode of adjusting the indoor temperature and humidity, the proportion of the first branch air and the second branch air can be adjusted and controlled according to the current indoor temperature and humidity and the temperature and humidity condition of the introduced outdoor air, the indoor temperature and humidity can be directly controlled according to the adjustment degree of the first branch air, and the air volume control of the second branch air is mainly controlled by the number of opening nozzles. According to the invention, the air volume control of the second branch air is realized by adopting a plurality of nozzles and the automatic switch cantilever devices arranged on the nozzles.
Specifically, after outdoor air enters the device provided by the invention, a part of air volume passes through a water-water circulation system and/or a circulation regulation system, the other part of air volume passes through a nozzle device internally provided with a plurality of nozzles, the number of the nozzles is regulated according to the air volume, the nozzles are provided with automatic switch cantilever devices, the cantilever devices rotate by a rotating motor or an air pressure device, the nozzles are automatically opened or closed, and the number of the nozzles is automatically selected according to application conditions to calculate bypass air volume.
In the actual working process: according to the change of seasons, when the environmental temperature is high, the nozzle device is closed, and the cooling system is cooled; when the environment temperature is low temperature and high humidity, according to the dehumidification quantity requirement, simultaneously acquiring an air inlet parameter and an air outlet absolute moisture content parameter required by calculation, and further automatically selecting the number of the opened nozzles to achieve the effect of saving most energy; when the environmental temperature is low and the absolute moisture content of the room is achieved, different fresh air volumes are selected according to the in-and-out conditions of field personnel or the requirements of equipment, and partial nozzles are automatically closed to achieve the minimum fresh air volume meeting the requirements.
Further, the nozzle device may employ a perforated plate.
An air supply mode of a variable air volume energy-saving temperature and humidity control device comprises the following steps;
s1, detecting the indoor current temperature T0 and humidity RH0, the outdoor wind temperature T1 and humidity RH1, and judging the condition needing to be adjusted according to the standard temperature T and humidity RH: if the temperature is higher, i.e. T0> T, go to step S2; if the temperature is lower and the humidity is higher, i.e. T0< T, go to step S3;
s2, closing the nozzle device, and reducing the indoor temperature by adopting the circulation adjusting system;
s3, obtaining the required air volume V1 of the first branch air, the air volume V2 of the second branch air and the temperature T2 and the humidity RH2 which the circulation adjusting system needs to adjust the first branch air to reach according to the dehumidification requirement;
s4, adjusting the number of the opened nozzles by the nozzle device according to the air volume V2 requirement of the second branch air;
s5, the evaporator cools and dehumidifies a first branch air to be entered into a room, and then the condenser heats a second branch air after cooling and dehumidification to reach the temperature T2 and the humidity RH2 required by the first branch air;
and S6, introducing first branch air with the air volume of V1, the temperature and humidity of T2 and RH2 respectively and second branch air with the air volume of V2 and the temperature and humidity of T1 and RH1 respectively into a room, and mixing to ensure that the indoor temperature and humidity reach standard values T and RH respectively.
Specifically, in step S3, when the temperature is relatively low and the absolute humidity is qualified, a part of the nozzle devices is opened to introduce the minimum amount of the second branch wind, and the second branch wind and the first branch wind are mixed and introduced into the room to adjust the indoor temperature and humidity.
Specifically, the second branch wind in the invention is equivalent to the bypass wind volume of the wind entering the indoor, and in the actual operation process, the detailed operation and control method is as follows:
a temperature and humidity control method of a variable air volume energy-saving temperature and humidity control device comprises the following steps:
l1 introducing outside air with volume V, temperature T1 and humidity RH 1;
l2 divides the volume V of air into two portions V1 and V2;
l3 is adjusted to T2 and RH2 by the air conditioner for adjusting the temperature of the air with the volume V2;
l4 mixing at least a portion of air with a temperature of T1, a humidity of RH1 and a volume of V1 with air with a temperature of T2, a humidity of RH2 and a volume of V2 to make the mixed air have a temperature of T3 and a humidity of RH 3;
l5 outputs air with temperature T3 and humidity RH3 to indoor;
wherein T1> T3> T2, RH1> RH3> RH 2.
Compared with the prior art, the method for directly adjusting the temperature and the humidity of the introduced external air in the invention only needs to adjust one part of the introduced air, thus saving more energy consumption, and the other part can be rapidly output without being processed, thus making up the problem of insufficient fresh air flow in the prior art.
In the above step L2, the control of the diversion device of the air intake duct is performed to make V1> V2, preferably to make V1 at least 1.5 times V2 or more, so as to ensure that the bypass component V1 has a sufficient amount to be supplied to step L4 for mixing, so that there is a high flexibility in step L4 to select how much air with temperature T1 and humidity RH1 is output to be mixed with the air with volume V2, temperature T2 and humidity RH2 after temperature and humidity adjustment.
In the step L4, the temperature T3 and the humidity RH3 are the final required temperatures and humidities, and at least a part of V3 is selected from the bypassed V1 to be mixed with the final required temperatures and humidities, i.e., the temperature T3 and the humidity RH3, according to the temperature T2 and the humidity RH2 adjusted by V2, so that the mixed temperatures and humidities reach the final required temperatures, i.e., the temperature T3 and the humidity RH3, wherein V is greater than or equal to V2+ V3. The method has the advantages that the V1 is larger than the V2, then the proper V3 is selected from the V1 and mixed with the V2, the air mixing mode has high flexibility, and particularly when the finally required temperature and humidity T3/RH3 needs to be adjusted, the control can be realized by simply controlling the amount of the V3.
In the step L5, in the use environment with relaxed requirement on the temperature and humidity of the output air, that is, only the temperature and humidity of the air finally mixed in the room are finally considered, V2 and V3 may be directly output to the room and mixed in the room.
Two methods for dividing the air supply voltage V1 and the air supply voltage V2 in the step L2 can be adopted, wherein the first method is to divide the air supply voltage V1 and the air supply voltage V2 according to the optimization of energy consumption of an air conditioning device, namely the most energy-saving method, and the second method is to meet the requirement of the lowest amount of fresh air demand according to the fresh air demand, namely the output air V2+ V3 on the premise that the output temperature and humidity meet the T3/RH 3. Whether start air conditioner device and carry out temperature and humidity control and new trend input still includes the step L0 that detects whether indoor temperature, humidity and carbon dioxide concentration meet the requirements, specifically includes following three kinds:
first, temperature detection, temperature exceeding an allowable range, and temperature increase or decrease are required:
l011 detects the indoor air temperature T room;
l012 comparing whether the T chamber exceeds the standard temperature T standard allowable range Delta T;
when the number of the T rooms (T mark + delta T) is larger than L013, starting the air conditioner to cool;
l014 when T room < (T mark-delta T), start the air conditioner and raise the temperature.
Second, humidity detection, humidity above the allowable range, requires dehumidification:
l021 detecting indoor air humidity RH chamber;
l022 comparing whether the RH chamber exceeds a standard allowable range Delta RH of a standard humidity value RH;
l023 when RH room > (RH mark + Δ RH), the air conditioner was activated to perform the division.
Thirdly, detecting the concentration of carbon dioxide, wherein the concentration of carbon dioxide is higher than an allowable range, and fresh air needs to be supplemented:
l021 detecting indoor carbon dioxide concentration CO2 chamber;
l022 compares whether the CO2 chamber is out of the allowable range Δ CO2 of the standard carbon dioxide concentration value CO 2;
l023 when CO2 room > (CO2 mark + delta CO2), the air conditioner was started to replenish fresh air.
Under the above detection conditions, the air conditioning apparatus may select various different combinations of functions according to specific detection conditions, so as to implement an optimal design of energy consumption, which may specifically include the following various combinations:
1. only tempering, i.e. V1 ═ 0, V2 ═ V, V2 temperature was adjusted from T1 to T3;
2. only fresh air is supplemented, namely V2 is 0, V1 is V, and the temperature and humidity are not adjusted, namely T1 is T3, and RH1 is RH 3;
3. temperature adjustment and dehumidification, that is, V1 is 0, V2 is V, V2 is adjusted from T1 to T3, and RH1 is adjusted to RH3, which is the highest selection of energy consumption, and is generally applicable to the case of mandatory rapid temperature and humidity adjustment.
4. The temperature of the mixed air is adjusted, namely the temperature of V1 is T1, the temperature of V2 is adjusted from T1 to T2, the temperature of V2+ V3 after mixing is T3, and V1 is not more than V3;
5. mixing air for dehumidification, namely adjusting the humidity of V1 to RH1 and the humidity of V2 from RH1 to RH2, wherein the humidity of V2+ V3 after mixing is RH3, and V1 is not less than V3;
6. mixing air, adjusting temperature and dehumidifying, namely adjusting the temperature T1 and the humidity RH1 of V1, adjusting the temperature of V2 from T1 to T2 and the humidity from RH1 to RH2, adjusting the temperature of V2+ V3 after mixing to be T3 and the humidity to be RH3, wherein V3 is not more than V1;
7. the fresh air is subjected to temperature regulation, namely the temperature of V1 is T1, the temperature of V2 is regulated from T1 to T2, the temperature of V2+ V3 after mixing is T3, and V2+ V3 is V new, so that the condition is suitable for the condition that the indoor carbon dioxide concentration and temperature are high, fresh air needs to be supplemented quickly and the temperature is reduced, and the minimum requirement on the fresh air input volume V is newly met;
8. fresh air dehumidification, namely humidity RH1 of V1, humidity of V2 are adjusted from RH1 to RH2, humidity of V2+ V3 after mixing is RH3, and V2+ V3 is V new, so that the case is suitable for indoor carbon dioxide concentration and humidity are high, fresh air needs to be supplemented quickly and dehumidification is performed, and the minimum requirement is met on fresh air input volume V new;
9. the fresh air is subjected to temperature regulation and dehumidification, namely the temperature T1 and the humidity RH1 of V1, the temperature of V2 is regulated from T1 to T2, the humidity is regulated from RH1 to RH2, the temperature of V2+ V3 after mixing is T3, the humidity is RH3, and V2+ V3 is V new, so that the temperature regulation and dehumidification method is suitable for the situation that the indoor carbon dioxide concentration and the temperature and humidity are high, the fresh air needs to be supplemented quickly, the temperature regulation and the dehumidification are needed, and the minimum requirement on the fresh air input quantity V is newly met.
From the above various situations, it can be seen that the method of the present invention is suitable for various specific requirements of the air conditioner, and the strategy adopted by the air conditioner device can be specifically adjusted according to different requirements, so as to optimize the power consumption.
In case 6, air mixing, temperature adjustment and dehumidification are performed, an intake air flow rate (V2+ V3)/T and a temperature and humidity T3/RH3 are calculated according to an indoor temperature and humidity T chamber/RH chamber and an indoor air volume V chamber and a standard temperature and humidity T standard/RH standard, so that the temperature and humidity of the intake air mixed with the indoor air can be within an allowable range (T standard ± Δ T) and (RH standard + Δ RH), V2/T2/RH2 is calculated through V3/T3/RH3 and T1/RH1, and energy consumption for adjusting the temperature and humidity of (V2+ V2) after air mixing from T2/RH2 to T2/RH2 is optimized according to V2 being not more than or less than V2 and environmental parameters and temperature and dehumidification capabilities of the air conditioning device, so that energy consumption of (V2+ V2) T2 is not more than V3T 2+ V2T 2+ V2 and (V2+ RH) is not more than V2.
If the fresh air is subjected to temperature regulation and dehumidification in the case 9, the fresh air quantity (V2+ V3) introduced into the fresh air is calculated according to an indoor carbon dioxide concentration CO2 chamber and a standard carbon dioxide concentration value CO2 standard, calculating the temperature and humidity T3/RH3 of the introduced air according to the indoor temperature and humidity T chamber/RH chamber and indoor air volume V chamber, the standard temperature and humidity T standard/RH standard and the fresh air volume (V2+ V3), so that the concentration of carbon dioxide and the temperature and humidity after the introduced fresh air is mixed with the indoor air can be in the allowed range, i.e. (CO 2+ Δ CO2), (T scale. + -. Δ T) and (RH scale + Δ RH), V2/T2/RH2 was calculated by V3/T3/RH3 and T1/RH1, according to V3 not more than V1, and the environmental parameters and the temperature-adjusting and dehumidifying capacity of the air-conditioning device, the energy consumption for adjusting the temperature and humidity of the fresh air (V2+ V3) from T1/RH1 to T3/RH3 is optimized.
In order to make the above regulation flexible, it is possible to optimize the energy consumption:
various adjusting devices can be arranged on the air conditioning device to adjust related parameters, such as bypass control is arranged to control the proportion of V1 and V2, and a fresh air outlet controllable nozzle is arranged to adjust the V3.
A plurality of groups of refrigerating and heating equipment with different efficiencies can be arranged on the air conditioning device, for example, a water circulation system comprising a water pump, a water cooling device, a hydrothermal device and the like is adopted as the refrigerating and heating equipment with low efficiency and low energy consumption; a refrigerant air conditioning unit is adopted, and comprises a compressor, a condenser, an evaporator, an expansion valve and the like, and the refrigerant air conditioning unit is used as high-efficiency refrigerating and heating equipment; the refrigeration and heating equipment with high and low energy consumption is convenient for the system to select or match according to the actual temperature and humidity adjusting range and the actual efficiency.
The energy recovery layout can be arranged on the air conditioning device, for example, the cooling equipment is arranged at the front end and used for cooling and dehumidifying, the cooled refrigerant is transmitted to the rear end and used for heating, the energy recovery is realized, and forced heating equipment, for example, a heater, can be further arranged and used for final heating supplement, and the optimization of energy utilization is realized.
The refrigerant mixing channel can be arranged in the air conditioning device, the mixing among a high-temperature refrigerant, a medium-temperature refrigerant and a low-temperature refrigerant is realized through the opening and closing of different valves, the flexible adjustment of the temperature of the refrigerant can be realized on the premise of not frequently changing the power, and the control mode of the temperature is optimized.
In order to facilitate control and adjust the power of the air conditioner at high speed according to the adaptability of the use environment, the invention can realize unified control by a central control system, and the central control system is connected with the adjusting device, the refrigerating and heating equipment, the valve and other devices in a control way and is also connected with a plurality of temperature and humidity sensors and carbon dioxide sensors which are arranged indoors and outdoors and on each device or pipeline and used for collecting each parameter for calculation.
The control method of the central control system comprises the following specific steps:
step A: detecting environmental information inside/outside the air conditioner box in real time through a sensor group;
and B: the environmental information is fed back to the central control system through the data acquisition system;
and C: the central control system compares the fed-back environment information with the standard environment information, and if the fed-back environment information is within the allowable range of the standard environment information, the step D is executed; if the fed back environment information is not in the allowable range of the standard environment information, executing the step E;
step D: performing steps A-C;
step E: the central control system respectively controls the self-circulation water system, the refrigerating system, the heater, the air-conditioning air supply system, the water system, the power supply system, the nozzle device and the air-conditioning box body to adjust the environmental conditions to be within the allowable range of standard environmental information.
Compared with the prior art, the invention has the beneficial effects that:
according to the indoor temperature and humidity control system, outdoor air is introduced and divided into two paths, the first branch air is adjusted by the aid of the circulation adjusting device, and the second branch air enters the indoor space and is mixed with the first branch air to achieve the indoor temperature and humidity adjustment mode; the condensation heat emitted by the condenser is adopted to heat and raise the temperature of the air, the temperature adjusting and dehumidifying functions are finally achieved, the adjusting process is accurate, energy is saved by the condensation heat, the indoor temperature and humidity are adjusted by mixing with the second branch air, and the energy consumption is effectively reduced; the mode of combining the water circulation system and the circulation adjusting system is adopted, the adjusting effect is improved, the water circulation system is suitable for various working conditions, and the energy consumption is reduced; in addition, a heater is arranged, and the heater is adopted to heat the first branch air when necessary, so that unlimited and accurate control is realized; a first preheating channel and a second preheating channel are arranged in the circulation adjusting system, so that stepless adjustment of temperature and humidity control is realized; the pressure balancing device is arranged to ensure the pressure in the device to be stable, so that the device can safely operate; and the nozzle device comprises a plurality of nozzles and an automatic switch cantilever device arranged on the nozzles, so that the air volume of the second branch air can be controlled at will. In conclusion, the invention has the advantages of precise adjustment process, energy conservation, low energy consumption and convenient control.
Drawings
Fig. 1 is a schematic flow chart of the working structure principle of the present invention.
Fig. 2 is a schematic view of the connection structure of the present invention.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 1 and fig. 2, the present embodiment provides a variable air volume energy-saving type temperature and humidity control device, which includes a first temperature and humidity detection device for detecting indoor temperature and humidity, a second temperature and humidity detection device for detecting temperature and humidity of outdoor air entering into an indoor room, a flow dividing device for dividing the outdoor air entering into the indoor room into a first branch air and a second branch air, a circulation regulation system for dehumidifying and temperature regulating the first branch air, a nozzle device 22 for feeding the second branch air into the indoor room to be mixed with the processed first branch air, and a central control system 1 electrically connected to the first branch air and the second branch air; the circulation regulating system comprises a compressor 3, a condenser 4, an expansion valve 5 and an evaporator 6 which form a refrigeration cycle process, wherein the evaporator 6 cools and dehumidifies first branch air, and the condenser 4 heats and warms the first branch air after cooling and dehumidifying. Specifically, the variable air volume energy-saving type temperature and humidity control device provided by the invention further comprises a blower 30 for sending the processed first branch air into the room.
According to the invention, outdoor air is introduced and divided into two paths, the first branch air is adjusted by the circulation adjusting device, the second branch air enters the room and is mixed with the first branch air to adjust the indoor temperature and humidity, the proportion of the first branch air and the second branch air and the degree of adjustment of the first branch air can be adjusted and controlled according to the current indoor temperature and humidity and the temperature and humidity condition of the introduced outdoor air, the indoor temperature and humidity can be directly controlled, in the process of processing the first branch air, the first branch air is cooled and dehumidified by the evaporator 6, then the first branch air is heated and warmed by the condensation heat emitted by the condenser 4, the temperature and humidity adjusting function is finally achieved, the adjusting process is accurate, the energy is saved by the condensation heat, and the indoor temperature and humidity are adjusted by mixing with the second branch air, so that the energy consumption is effectively reduced.
Further, the energy-saving temperature and humidity control device with variable air volume further comprises a water circulation system for adjusting the temperature and the humidity of the first branch air, the water circulation system is electrically connected with the central control system 1, the water circulation system comprises a surface cooling coil 7 for cooling and dehumidifying the first branch air, a water pump 29 for circulating water and a heating coil 8 for heating the first branch air after cooling and dehumidifying.
Specifically, still be equipped with first water filter 9, relief valve 10, hydrologic cycle stop valve 11 and expansion tank 12 between table cold coil 7 and the heating coil 8, hydrologic cycle system still includes automatic water supply device and automatic drainage device, automatic water supply device includes second water filter 13, hand valve 14 and automatic water supply valve 15, automatic drainage device includes drain valve 16.
In the operation process, the first branch wind enters the surface cooling coil 7 of the water circulation system to pre-cool and cool, absorbs heat from the water side of the heating coil 8 of the water circulation system to heat and warm, the water in the water circulation system overcomes water resistance through the water pump 29, reaches the heating coil 8 of the water circulation system through the first water filter 9, the safety valve 10, the water circulation stop valve 11 and the expansion tank 12, the air is heated and recycled through the drain valve 16 configured in the water circulation system and the automatic water replenishing valve 15, the hand valve 14 and the second water filter 13, and then returns to the surface cooling coil 7 of the water circulation system, the exhaust valve is arranged at the top of the whole system, and in addition, the system is provided with an automatic water replenishing device and an automatic water draining device.
According to the invention, the water circulation system has a function similar to that of the circulation regulation system, firstly, the first branch wind is cooled and dehumidified, and then the first branch wind after cooling and dehumidification is heated and warmed, the water circulation system can be used independently, is used under the condition of small temperature and humidity regulation amplitude, and can also be used in parallel with the circulation regulation system, so that the cooling coil is adjacent to the evaporator 6, the first branch wind is cooled and dehumidified in two steps, the heating coil 8 is in parallel with the condenser 4, and the first branch wind after cooling and dehumidification is heated and warmed in two steps. When the water circulation system and the circulation adjusting system are used in parallel, first branch air enters the energy-saving variable air volume temperature and humidity control device from the outside, is precooled, cooled and dehumidified by the surface cooling coil 7, is deeply cooled and dehumidified by the evaporator 6, enters the heating coil 8 for heating and warming, and finally enters the condenser 4 for heating and warming to meet the adjusting requirement; on the other hand, the water circulation system is adopted to reinforce the adjusting function of the circulation adjusting system, so that the energy consumption of the circulation adjusting system is reduced, and the energy-saving effect is achieved.
Further, the variable air volume energy-saving type temperature and humidity control device further comprises an electric heater 17 connected with the evaporator 6 and/or the heating coil 8, and the heater is electrically connected with the central control device. According to the invention, by arranging the electric heater 17, when the heating capability of the heating coil 8 and the evaporator 6 on the first branch wind is insufficient or cannot be used, the electric heater 17 is used for further heating and warming, so that the first branch wind after being treated can reach a qualified state, and the indoor temperature and humidity can be controlled more accurately.
Further, the condenser 4 includes an air-cooled condenser 4 and a water-cooled condenser 18, the water-cooled condenser 18 is used for making the refrigerant coming out from the compressor 3 absorb part of the condensation heat load, and the air-cooled condenser 4 is used for absorbing the residual condensation heat load of the refrigerant and simultaneously heating the air. It should be noted that, the invention can also be provided with only one condenser 4, and when only one condenser 4 is provided, the air-cooled condenser 4 capable of directly heating the first branch is adopted; in addition, the water-cooled condenser 18 may be replaced with an air-cooled condenser 4 disposed outdoors. In the embodiment, the water-cooled condenser 18 and the air-cooled condenser 4 are connected, wherein the water-cooled condenser 18 pre-cools the high-temperature and high-pressure liquid entering the air-cooled condenser 4, so that the air volume of the first branch air cooling fan can be steplessly adjusted.
Further, a first preheating channel is arranged between the outlet of the compressor 3 and the outlet of the expansion valve 5, the first channel comprises a first stop valve 19 for adjusting on-off and a first regulating valve 20 for adjusting opening degree, and the first stop valve 19 and the first regulating valve 20 are electrically connected with the central control system 1. Specifically, the first regulating valve 20 is an electromagnetic valve.
In the invention, the outlet of the compressor 3 can be connected to the outlet of the expansion valve 5, the electromagnetic valve and the first stop valve 19 are arranged in the middle, the electromagnetic valve is opened to enable the refrigerant in a high-temperature and high-pressure liquid state coming out of the compressor 3 to be mixed with the normal-temperature and low-pressure liquid coming out of the expansion valve 5, the refrigerant which is about to enter the evaporator 6 is preheated and heated, the heat released by the evaporation of the refrigerant in the evaporator 6 is reduced, and the degree of temperature reduction and dehumidification of the first branch air by the evaporator 6 is reduced; the degree of preheating and temperature rising of the refrigerant entering the evaporator 6 is adjusted by changing the opening degree of the electromagnetic valve and controlling the mixing proportion, so that the degree of cooling and dehumidifying of the first branch by the evaporator 6 is controlled, and the temperature and humidity control and adjustment in the invention are more comprehensive and accurate.
Further, a second preheating channel is arranged between the outlet of the water-cooled condenser 18 and the inlet of the expansion valve 5, the second preheating channel comprises a second regulating valve 21 for regulating the opening degree, and the second regulating valve 21 is electrically connected with the central control system 1. Specifically, the second regulating valve 21 is an electromagnetic valve.
In the invention, a second preheating channel is arranged between the outlet of the water-cooled condenser 18 and the inlet of the expansion valve 5, so that a refrigerant of a slightly lower high-temperature and high-pressure liquid which is preliminarily preheated by the water-cooled condenser 18 and is relatively discharged from the compressor 3 is mixed with a normal-temperature liquid which is about to enter the expansion valve 5, the temperature of the refrigerant entering the evaporator 6 is regulated, the temperature reduction and dehumidification degree of the first branch wind by the evaporator 6 is further controlled, and the temperature and humidity control in the invention realizes stepless regulation.
Further, a gas-liquid separator 27 is disposed between the evaporator 6 and the compressor 3, and the gas-liquid separator 27 is used for filtering out the liquid refrigerant coming out of the evaporator 6. Specifically, because the power of the evaporator 6 and the influence of the actual working condition thereof cannot make the refrigerant coming out of the evaporator 6 completely reach the gas state, the gas-liquid separator 27 is arranged between the evaporator 6 and the compressor 3, so that the refrigerant entering the compressor 3 is completely in the gas state, and the smooth operation of the circulation regulation system is ensured.
Further, the energy-saving variable air volume temperature and humidity control device further comprises an air filter screen 28 arranged before the flow dividing device, wherein the air filter device is used for filtering impurities in outdoor air and avoiding damage to the energy-saving variable air volume temperature and humidity control device.
Further, the polytropic air quantity energy-saving type temperature and humidity control device further comprises a pressure balancing device electrically connected with the central control system 1, wherein the pressure balancing device comprises a first pressure controller 22, a second pressure controller 23 and a two-way valve 24 arranged at the outlet of the water-cooled condenser 18, the compressor 3 is electrically connected with the first pressure controller 22, the set value of the first pressure controller 22 is a lower allowable condensing pressure limit, the set value of the second pressure controller 23 is an upper allowable condensing pressure limit, and the first pressure controller 22 and the second pressure controller 23 are used for adjusting the pressure of the system by controlling the opening degree of the two-way valve 24. In order to achieve pressure stabilization in the circulation regulation system, in particular at the location of the compressor 3, the invention provides a pressure balancing device which is electrically connected to the central control system 1.
In the invention, the pressure balancing device comprises two pressure controllers and a two-way water valve, the set values of the pressure controllers are respectively an upper limit value and a lower limit value allowed by the condensing pressure, and when the condensing pressure is at the upper limit value allowed by the pressure, the two pressure controllers simultaneously feed back two 'on' signals or two 'off' signals to control the water valve and close the small water valve; when the condensing pressure is between the upper limit value and the lower limit value of the pressure allowance, the two pressure controllers simultaneously feed back an on signal and an off signal to control the water valve, and the water valve is stable; when the condensing pressure is at the lower limit of the pressure allowable value, the two pressure controllers simultaneously feed back two 'off' signals or two 'on' signals to control the water valve, and open the large water valve to keep the system pressure stable.
Further, the nozzle device 22 includes a plurality of nozzles 25 and an automatic opening and closing arm device 26 disposed on the nozzles 25, the automatic opening and closing arm device 26 is used for opening or closing the nozzles 25 to adjust the volume of the second branch wind, and the automatic opening and closing arm device 26 is electrically connected to the central control system 1. The invention realizes the air volume control of the second branch air by adopting a plurality of nozzles 25 and an automatic switch cantilever device 26 arranged on the nozzles 25.
Specifically, after outdoor air enters the device provided by the invention, a part of air volume passes through a water-water circulation system and/or a circulation regulation system, the other part of air volume passes through a nozzle device 22 internally provided with a plurality of nozzles 25, the number of the nozzles 25 is regulated according to the air volume, the nozzles 25 are provided with an automatic switch cantilever device 26, the cantilever device 26 comprises a rotating motor or an air pressure device to rotate, the nozzles 25 are automatically opened or closed, and the number of the nozzles 25 is automatically selected according to application conditions to calculate the bypass air volume.
In the actual working process: according to the change of the whole year, when the environmental temperature is high, the nozzle device 22 is closed, and the cooling system is cooled; when the environment temperature is low temperature and high humidity, according to the dehumidification quantity requirement, simultaneously acquiring an air inlet parameter and an air outlet absolute moisture content parameter required by calculation, and further automatically selecting the number of the opened nozzles 25 so as to achieve the effect of saving most energy; when the environmental temperature is low and the absolute moisture content of the room is reached, different fresh air volumes are selected according to the in-and-out conditions of field personnel or the requirements of equipment, and partial nozzles 25 are automatically closed to reach the minimum fresh air volume meeting the requirements.
Further, the nozzle device 22 may employ a perforated plate.
An air supply mode of a variable air volume energy-saving temperature and humidity control device is characterized by comprising the following steps;
s1, detecting the indoor current temperature T0 and humidity RH0, the outdoor wind temperature T1 and humidity RH1, and judging the condition needing to be adjusted according to the standard temperature T and humidity RH: if the temperature is higher, i.e. T0> T, go to step S2; if the temperature is lower and the humidity is higher, i.e. T0< T, go to step S3;
s2, closing the nozzle device 22, and reducing the indoor temperature by using the circulation adjusting system;
s3, obtaining the required air volume V1 of the first branch air, the air volume V2 of the second branch air and the temperature T2 and the humidity RH2 which the circulation adjusting system needs to adjust the first branch air to reach according to the dehumidification requirement;
s4, adjusting the number of the opened nozzles 25 by the nozzle device 22 according to the air volume V2 requirement of the second branch air;
s5, the evaporator 6 cools and dehumidifies the first branch air to be entered into the room, and then the condenser 4 heats the second branch air after cooling and dehumidification to reach the temperature T2 and the humidity RH2 required by the first branch air;
and S6, introducing first branch air with the air volume of V1, the temperature and humidity of T2 and RH2 respectively and second branch air with the air volume of V2 and the temperature and humidity of T1 and RH1 respectively into a room, and mixing to ensure that the indoor temperature and humidity reach standard values T and RH respectively.
Specifically, in step S3, when the temperature is relatively low and the absolute humidity is qualified, part of the nozzle devices 22 are opened to introduce the minimum amount of the second branch wind, and the second branch wind and the first branch wind are mixed and introduced into the room to adjust the indoor temperature and humidity.
Example 2
As shown in fig. 2, the present embodiment provides a variable air volume energy-saving type temperature and humidity control device, which includes a first temperature and humidity detection device for detecting indoor temperature and humidity, a second temperature and humidity detection device for detecting temperature and humidity of outdoor air entering into an indoor room, a flow dividing device for dividing the outdoor air entering into the indoor room into a first branch air and a second branch air, a circulation regulation system for dehumidifying and temperature regulating the first branch air, a nozzle device 22 for feeding the second branch air into the indoor room to be mixed with the processed first branch air, and a central control system 1 electrically connected to the first branch air and the second branch air; the circulation regulating system comprises a compressor 3, a condenser 4, an expansion valve 5 and an evaporator 6 which form a refrigeration cycle process, wherein the evaporator 6 cools and dehumidifies first branch air, and the condenser 4 heats and warms the first branch air after cooling and dehumidifying. Specifically, the variable air volume energy-saving type temperature and humidity control device provided by the invention further comprises a blower 30 for sending the processed first branch air into the room.
Further, the energy-saving temperature and humidity control device with variable air volume further comprises a water circulation system for adjusting the temperature and the humidity of the first branch air, the water circulation system is electrically connected with the central control system 1, the water circulation system comprises a surface cooling coil 7 for cooling and dehumidifying the first branch air, a water pump 29 for circulating water and a heating coil 8 for heating the first branch air after cooling and dehumidifying.
Specifically, still be equipped with first water filter 9, relief valve 10, hydrologic cycle stop valve 11 and expansion tank 12 between table cold coil 7 and the heating coil 8, hydrologic cycle system still includes automatic water supply device and automatic drainage device, automatic water supply device includes second water filter 13, hand valve 14 and automatic water supply valve 15, automatic drainage device includes drain valve 16.
In the invention, the water circulation system has a function similar to that of the circulation regulation system and is used in parallel with the circulation regulation system, specifically, the cooling coil is adjacent to the evaporator 6 to carry out two-step cooling dehumidification on the first branch wind, and the heating coil 8 is parallel to the condenser 4 to carry out two-step heating and temperature rise on the first branch wind after cooling dehumidification. Under the condition that a water circulation system and a circulation adjusting system are used in parallel, first branch air enters the variable air volume energy-saving type temperature and humidity control device from the outside, is precooled, cooled and dehumidified through the surface cooling coil 7, is deeply cooled and dehumidified through the evaporator 6, enters the heating coil 8 for heating and warming, and finally enters the condenser 4 for heating and warming to meet the adjusting requirement.
Further, the variable air volume energy-saving type temperature and humidity control device further comprises an electric heater 17 connected with the evaporator 6 and/or the heating coil 8, and the heater is electrically connected with the central control device.
Further, the condenser 4 includes an air-cooled condenser 4 and a water-cooled condenser 18, the water-cooled condenser 18 is used for making the refrigerant coming out from the compressor 3 absorb part of the condensation heat load, and the air-cooled condenser 4 is used for absorbing the residual condensation heat load of the refrigerant and simultaneously heating the air. In the embodiment, the water-cooled condenser 18 and the air-cooled condenser 4 are connected, wherein the water-cooled condenser 18 pre-cools the high-temperature and high-pressure liquid entering the air-cooled condenser 4, so that the air volume of the first branch air cooling fan can be steplessly adjusted.
Further, a first preheating channel is arranged between the outlet of the compressor 3 and the outlet of the expansion valve 5, the first channel comprises a first stop valve 19 for adjusting on-off and a first regulating valve 20 for adjusting opening degree, and the first stop valve 19 and the first regulating valve 20 are electrically connected with the central control system 1. Specifically, the first regulating valve 20 is an electromagnetic valve.
Further, a second preheating channel is arranged between the outlet of the water-cooled condenser 18 and the inlet of the expansion valve 5, the second preheating channel comprises a second regulating valve 21 for regulating the opening degree, and the second regulating valve 21 is electrically connected with the central control system 1. Specifically, the second regulating valve 21 is an electromagnetic valve.
In the invention, a second preheating channel is arranged between the outlet of the water-cooled condenser 18 and the inlet of the expansion valve 5, so that a refrigerant of a slightly lower high-temperature and high-pressure liquid which is preliminarily preheated by the water-cooled condenser 18 and is relatively discharged from the compressor 3 is mixed with a normal-temperature liquid which is about to enter the expansion valve 5, the temperature of the refrigerant entering the evaporator 6 is regulated, the temperature reduction and dehumidification degree of the first branch wind by the evaporator 6 is further controlled, and the temperature and humidity control in the invention realizes stepless regulation.
Further, a gas-liquid separator 27 is disposed between the evaporator 6 and the compressor 3, and the gas-liquid separator 27 is used for filtering out the liquid refrigerant coming out of the evaporator 6. Specifically, because the power of the evaporator 6 and the influence of the actual working condition thereof cannot make the refrigerant coming out of the evaporator 6 completely reach the gas state, the gas-liquid separator 27 is arranged between the evaporator 6 and the compressor 3, so that the refrigerant entering the compressor 3 is completely in the gas state, and the smooth operation of the circulation regulation system is ensured.
Further, the energy-saving variable air volume temperature and humidity control device further comprises an air filter screen 28 arranged before the flow dividing device, wherein the air filter device is used for filtering impurities in outdoor air and avoiding damage to the energy-saving variable air volume temperature and humidity control device.
Further, the polytropic air quantity energy-saving type temperature and humidity control device further comprises a pressure balancing device electrically connected with the central control system 1, wherein the pressure balancing device comprises a first pressure controller 22, a second pressure controller 23 and a two-way valve 24 arranged at the outlet of the water-cooled condenser 18, the compressor 3 is electrically connected with the first pressure controller 22, the set value of the first pressure controller 22 is a lower allowable condensing pressure limit, the set value of the second pressure controller 23 is an upper allowable condensing pressure limit, and the first pressure controller 22 and the second pressure controller 23 are used for adjusting the pressure of the system by controlling the opening degree of the two-way valve 24. In order to achieve pressure stabilization in the circulation regulation system, in particular at the location of the compressor 3, the invention provides a pressure balancing device which is electrically connected to the central control system 1.
Further, the nozzle device 22 includes a plurality of nozzles 25 and an automatic opening and closing arm device 26 disposed on the nozzles 25, the automatic opening and closing arm device 26 is used for opening or closing the nozzles 25 to adjust the volume of the second branch wind, and the automatic opening and closing arm device 26 is electrically connected to the central control system 1. The invention realizes the air volume control of the second branch air by adopting a plurality of nozzles 25 and an automatic switch cantilever device 26 arranged on the nozzles 25.
Further, the nozzle device 22 may employ a perforated plate.
The air supply mode of the variable air volume energy-saving type temperature and humidity control device comprises the following steps;
s1, acquiring indoor current temperature T0 and humidity RH0 by a first temperature and humidity detection device, acquiring outdoor air temperature T1 and humidity RH1 by a second temperature and humidity detection device, and judging the condition needing to be adjusted by the central control system 1 according to the standard temperature T and humidity RH: if the temperature is higher, i.e. T0> T, go to step S2; if the temperature is lower and the humidity is higher, i.e. T0< T, go to step S3;
s2, the central control system 1 controls the closing of the nozzle device 22 and adopts the circulation adjusting system to reduce the indoor temperature;
s3, obtaining the required air volume V1 of the first branch air, the air volume V2 of the second branch air and the temperature T2 and the humidity RH2 which the circulation adjusting system needs to adjust the first branch air to reach according to the dehumidification requirement;
s4, adjusting the number of the opened nozzles 25 by the nozzle device 22 according to the air volume V2 requirement of the second branch air;
s5, the evaporator 6 cools and dehumidifies the first branch air to be entered into the room, and then the condenser 4 heats the second branch air after cooling and dehumidification to reach the temperature T2 and the humidity RH2 required by the first branch air;
and S6, introducing first branch air with the air volume of V1, the temperature and humidity of T2 and RH2 respectively and second branch air with the air volume of V2 and the temperature and humidity of T1 and RH1 respectively into a room, and mixing to ensure that the indoor temperature and humidity reach standard values T and RH respectively.
Specifically, in step S3, when the temperature is relatively low and the absolute humidity is qualified, part of the nozzle devices 22 are opened to introduce the minimum amount of the second branch wind, and the second branch wind and the first branch wind are mixed and introduced into the room to adjust the indoor temperature and humidity.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.

Claims (10)

1. A variable air volume energy-saving temperature and humidity control device is characterized by comprising a first temperature and humidity detection device for detecting indoor temperature and humidity, a second temperature and humidity detection device for detecting the temperature and humidity of outdoor air entering an indoor room, a flow dividing device for dividing the outdoor air entering the indoor room into first branch air and second branch air, a circulating regulation system for dehumidifying and regulating the temperature of the first branch air, a nozzle device for feeding the second branch air into the indoor room to be mixed with the first branch air after treatment, and a central control system electrically connected with the first temperature and humidity detection device and the nozzle device; the circulation regulating system comprises a compressor, a condenser, an expansion valve and an evaporator which form a refrigeration cycle process, wherein the evaporator enables a first branch to be cooled and dehumidified, and the condenser enables the first branch to be heated and warmed after cooling and dehumidification.
2. The variable air volume energy-saving type temperature and humidity control device according to claim 1, further comprising a water circulation system for first branch air temperature and humidity adjustment, wherein the water circulation system is electrically connected with the central control system and comprises a surface cooling coil pipe for cooling and dehumidifying the first branch air, a water pump for circulating water and a heating coil pipe for heating the first branch air after cooling and dehumidifying.
3. A variable air volume energy-saving type temperature and humidity control device according to claim 1 or 2, further comprising an electric heater connected with the evaporator and/or the heating coil, wherein the heater is electrically connected with the central control device.
4. The variable air volume energy-saving type temperature and humidity control device according to claim 1, wherein the condenser comprises an air-cooled condenser and a water-cooled condenser, the water-cooled condenser is used for enabling the refrigerant coming out of the compressor to absorb part of condensation heat load, and the air-cooled condenser is used for absorbing the rest of the condensation heat load of the refrigerant and simultaneously heating the air.
5. The variable air volume energy-saving type temperature and humidity control device according to claim 1, wherein a first preheating channel is arranged between the outlet of the compressor and the outlet of the expansion valve, the first channel comprises a first stop valve for adjusting on-off and a first regulating valve for adjusting opening degree, and the first stop valve and the first regulating valve are electrically connected with a central control system.
6. The variable air volume energy-saving type temperature and humidity control device according to claim 1 or 5, wherein a second preheating channel is arranged between the outlet of the water-cooled condenser and the inlet of the expansion valve, the second preheating channel comprises a second adjusting valve used for adjusting the opening degree, and the second adjusting valve is electrically connected with the central control system.
7. A polytropic air quantity energy-saving type temperature and humidity control device according to claim 1, 2, 4 or 5, further comprising a pressure balancing device electrically connected with a central control system, wherein the pressure balancing device comprises a first pressure controller, a second pressure controller and a two-way valve, the first pressure controller and the second pressure controller are electrically connected with the compressor, the two-way valve is arranged at the outlet of the water-cooled condenser, the set value of the first pressure controller is a lower allowable condensing pressure limit, the set value of the second pressure controller is an upper allowable condensing pressure limit, and the first pressure controller and the second pressure controller are used for adjusting the pressure of the system by controlling the opening degree of the two-way valve.
8. A variable air volume energy-saving type temperature and humidity control device according to claim 1, 2, 4 or 5, wherein the nozzle device comprises a plurality of nozzles and an automatic switch cantilever device arranged on the nozzles, the automatic switch cantilever device is used for opening or closing the nozzles to adjust the air volume of the second branch air, and the automatic switch cantilever device is electrically connected with the central control system.
9. The variable air volume energy-saving type temperature and humidity control device according to claim 1, wherein a gas-liquid separator is arranged between the evaporator and the compressor, and the gas-liquid separator is used for filtering out liquid refrigerant coming out of the evaporator.
10. The air supply mode of the variable air volume energy-saving type temperature and humidity control device according to claim 1, characterized by comprising the following steps;
s1, detecting the indoor current temperature T0 and humidity RH0, the outdoor wind temperature T1 and humidity RH1, and judging the condition needing to be adjusted according to the standard temperature T and humidity RH: if the temperature is higher, i.e. T0> T, go to step S2; if the temperature is lower and the humidity is higher, i.e. T0< T, go to step S3;
s2, closing the nozzle device, and reducing the indoor temperature by adopting the circulation adjusting system;
s3, obtaining the required air volume V1 of the first branch air, the air volume V2 of the second branch air and the temperature T2 and the humidity RH2 which the circulation adjusting system needs to adjust the first branch air to reach according to the dehumidification requirement;
s4, adjusting the number of the opened nozzles by the nozzle device according to the air volume V2 requirement of the second branch air;
s5, the evaporator cools and dehumidifies the first branch air to be entered into the room, and then the condenser heats the second branch air after cooling and dehumidification to reach the temperature T needed by the first branch air2And humidity RH2；
And S6, introducing first branch air with the air volume of V1, the temperature and humidity of T2 and RH2 respectively and second branch air with the air volume of V2 and the temperature and humidity of T1 and RH1 respectively into a room, and mixing to ensure that the indoor temperature and humidity reach standard values T and RH respectively.
CN201910769699.0A 2019-08-20 2019-08-20 Energy-saving temperature and humidity control device with variable air volume and air supply mode thereof Pending CN110793133A (en)

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CN111718100A (en) * 2020-06-29 2020-09-29 广东技术师范大学 Low-temperature sludge drying method and system
CN114353358A (en) * 2021-12-16 2022-04-15 臣功(北京)科技有限公司 Temperature and humidity independent control constant temperature and humidity unit based on solution dehumidification

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CN103912935A (en) * 2014-03-27 2014-07-09 成信绿集成股份有限公司 System and method for precise hierarchical control of temperature and humidity
CN109539384A (en) * 2018-11-02 2019-03-29 广东申菱环境系统股份有限公司 A kind of changeable air quantity fluorine pump energy saving air conditioner and its control method
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Application publication date: 20200214