CN111076277B - Energy-saving system and method for accurately controlling fresh air temperature and humidity and air conditioner - Google Patents

Energy-saving system and method for accurately controlling fresh air temperature and humidity and air conditioner Download PDF

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Publication number
CN111076277B
CN111076277B CN201911253287.8A CN201911253287A CN111076277B CN 111076277 B CN111076277 B CN 111076277B CN 201911253287 A CN201911253287 A CN 201911253287A CN 111076277 B CN111076277 B CN 111076277B
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fresh air
delta
temperature
humidity
heat exchanger
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CN111076277A (en
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陈晨
田宇
张士兵
赵振
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • 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
    • F24F11/62—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • 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
    • 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
    • F24F2110/20—Humidity

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to an energy-saving system for accurately controlling fresh air temperature and humidity, which comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a first control valve, a flash evaporator, a second control valve and an indoor side heat exchanger, wherein the outdoor heat exchanger is connected with the compressor; further comprising: the waste heat economizer is communicated with the indoor side heat exchanger; the humidifier is arranged in the waste heat economizer; the fresh air tail end heat exchanger is communicated with the waste heat economizer and is communicated with the outdoor side heat exchanger; one end of a third control valve is communicated with the fresh air tail end heat exchanger, and the other end of the third control valve is communicated with a pipeline between the second control valve and the indoor side heat exchanger; the temperature and humidity sensing system is used for detecting the temperature and humidity of fresh air passing through the outdoor heat exchanger, the waste heat economizer and the fresh air tail end heat exchanger. The energy-saving fresh air system capable of accurately controlling the temperature and the humidity has the advantages of accurate temperature and humidity control, high system energy efficiency and capability of achieving the effects of energy conservation and environmental protection, and further provides a method and an air conditioner for accurately controlling the temperature and the humidity of fresh air.

Description

Energy-saving system and method for accurately controlling fresh air temperature and humidity and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an energy-saving system for accurately controlling fresh air temperature and humidity, an air conditioner with the energy-saving system for accurately controlling the fresh air temperature and humidity, and a method for accurately controlling the fresh air temperature and humidity by using the energy-saving system for accurately controlling the fresh air temperature and humidity.
Background
The ventilation is required to be carried out according to corresponding standards in industrial production, construction sites, workshops, storehouses, mines and certain equipment rooms.
At present, the constant-temperature and constant-humidity fresh air machine on the market controls humidity by applying the principle of air heat and humidity treatment, the basic process of the constant-temperature and constant-humidity fresh air machine comprises heating, cooling, humidifying, dehumidifying and air mixing, the heating process of the constant-temperature and constant-humidity fresh air machine is heated by electric heating to control temperature, the purposes of constant temperature and constant humidity and temperature and humidity control are achieved, the temperature and humidity control of the fresh air machine is not accurate, the energy efficiency of the system is reduced, energy waste is caused, and the energy is not energy-saving and environment-friendly.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, provides an energy-saving fresh air system which is accurate in temperature and humidity control, high in system energy efficiency and capable of achieving energy-saving and environment-friendly effects and accurately controlling the temperature and the humidity, further provides an air conditioner with the energy-saving system which is accurate in temperature and humidity control, and provides a method for accurately controlling the temperature and the humidity of fresh air by using the energy-saving system which is accurate in temperature and humidity control.
In order to achieve the purpose, the invention adopts the following scheme:
an energy-saving system for accurately controlling fresh air temperature and humidity comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a first control valve, a flash evaporator, a second control valve and an indoor side heat exchanger; a refrigerating or heating circulating flow path is formed among the compressor, the four-way reversing valve, the outdoor heat exchanger, the first control valve, the flash evaporator, the second control valve and the indoor side heat exchanger; the energy-saving system for accurately controlling the fresh air temperature and humidity further comprises:
a waste heat economizer in communication with the indoor side heat exchanger;
the humidifier is arranged in the waste heat economizer and is used for humidifying fresh air;
the fresh air tail end heat exchanger is communicated with the waste heat economizer and is communicated with the outdoor side heat exchanger; the fresh air sequentially passes through the outdoor heat exchanger, the waste heat economizer and the fresh air tail end heat exchanger;
one end of the third control valve is communicated with the fresh air tail end heat exchanger, and the other end of the third control valve is communicated with a pipeline between the second control valve and the indoor side heat exchanger;
and the temperature and humidity sensing system is used for detecting the temperature and humidity of fresh air passing through the outdoor heat exchanger, the waste heat economizer and the fresh air tail end heat exchanger so as to control and adjust the temperature and the humidity of the fresh air through the first control valve, the second control valve and the third control valve.
Further, the temperature and humidity sensing system comprises:
the first temperature and humidity sensor is used for detecting the temperature and the relative humidity of the fresh air inlet;
the first temperature sensor is used for detecting the temperature of fresh air entering the waste heat economizer;
the second temperature and humidity sensor is used for detecting the temperature and the relative humidity of fresh air entering the fresh air end heat exchanger;
and the second temperature sensor is used for detecting the temperature of the fresh air entering the room.
Further, the air supplementing port of the flash evaporator is communicated with an air suction port of the compressor.
Furthermore, at the fresh air inlet, a fresh air fan is arranged on one side of the outdoor heat exchanger.
Furthermore, one side of the waste heat economizer is provided with a return air fan.
The invention provides an air conditioner which comprises an energy-saving system for accurately controlling fresh air temperature and humidity.
The invention provides a method for accurately controlling fresh air temperature and humidity, which is realized by using the energy-saving system for accurately controlling fresh air temperature and humidity, and comprises the following steps:
s1, detecting the temperature and humidity of fresh air passing through an outdoor heat exchanger, a waste heat economizer and a fresh air tail end heat exchanger to obtain the temperature T0 and the humidity N0 of a fresh air inlet;
and S2, judging according to the set target temperature T and the target relative humidity N and the temperature T0 and the humidity N0 of the fresh air inlet, and determining that the system enters a refrigeration mode or a heating mode to control and regulate the temperature and the humidity of the fresh air.
Further, the determination is performed according to the set target temperature T, the target relative humidity N, and the temperature T0 and the humidity N0 of the fresh air inlet, and it is determined that the system enters a cooling mode or a heating mode to control and adjust the temperature and the humidity of the fresh air, and the specific steps include:
s21, calculating delta T and delta N according to a set target temperature T, a target relative humidity N, and the temperature T0 and the humidity N0 of a fresh air inlet; judging according to the delta T and the delta N; the delta T is T0-T, and the delta N is N0-N;
s22, if delta T is less than 0 and delta N is less than 0, entering a heating mode to control and adjust the temperature and the humidity of fresh air;
s23, if the delta T is greater than 0 and the delta N is less than 0, entering a refrigeration mode to control and adjust the fresh air temperature and humidity;
s24, if the delta T is less than 0, the delta N is more than 0; entering a heating mode to control and adjust the temperature and the humidity of fresh air;
s25, if the delta T is greater than 0, the delta N is greater than 0; and entering a refrigeration mode to control and adjust the fresh air temperature and humidity.
Further, in step S22, entering a heating mode to control and adjust the fresh air temperature and humidity specifically includes:
preliminarily setting the running frequency of the compressor according to the magnitude of the Delta T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the heating quantity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the heating quantity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
Further, in the step S23, entering the cooling mode to control and adjust the fresh air temperature and humidity specifically includes:
preliminarily setting the running frequency of the compressor according to the magnitude of the Delta T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the refrigerating capacity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the refrigerating capacity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
Further, in step S24, entering a heating mode to control and adjust the fresh air temperature and humidity specifically includes:
preliminarily setting the running frequency of the compressor according to the size of the | delta T' |; wherein, the delta T 'is calculated by the difference between the dew point temperature T' of the fresh air inlet and the target temperature T, namely the delta T 'is T' -T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the heating quantity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the heating quantity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
Further, in the step S25, entering the cooling mode to control and adjust the fresh air temperature and humidity specifically includes:
preliminarily setting the running frequency of the compressor according to the size of the | delta T' |; wherein, the delta T 'is calculated by the difference between the dew point temperature T' of the fresh air inlet and the target temperature T, namely the delta T 'is T' -T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the refrigerating capacity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the refrigerating capacity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
Further, the step of correcting the operating frequency of the compressor through the positive, negative and magnitude of Δ T1 specifically includes:
if Δ T1 is positive, the compressor frequency is decreased;
if Δ T1 is negative, it increases based on the original frequency, and the larger Δ T1|, the higher the correction frequency.
Further, the step of correcting the humidification amount by the positive and negative values and the magnitude of Δ N2 specifically includes:
if Δ N2 is positive, turn off the humidifier;
if Δ N2 is negative, the amount of humidification increases in addition to the original amount of humidification, and the larger Δ N2|, the higher the corrected amount of humidification.
Further, the step of correcting the heating capacity by adjusting the second control valve through the positive and negative values and the size of Δ T2 specifically includes:
if Δ T2 is positive, decreasing the second control valve opening;
if Δ T2 is negative, the second control valve opening degree is increased.
Further, the step of correcting the heating capacity by adjusting the third control valve through the positive and negative values and the size of Δ T3 specifically includes:
if Δ T3 is positive, decreasing the third control valve opening;
if Δ T3 is negative, the third control valve opening degree is increased.
Compared with the prior art, the invention has the following advantages:
the energy-saving system for accurately controlling the temperature and the humidity of the fresh air is characterized in that a waste heat economizer and a fresh air tail end heat exchanger are additionally arranged on the basis of a refrigeration or heating circulating flow path formed by a compressor, a four-way reversing valve, an outdoor heat exchanger, a first control valve, a flash evaporator, a second control valve and an indoor side heat exchanger, and fresh air sequentially passes through the outdoor heat exchanger, the waste heat economizer and the fresh air tail end heat exchanger, so that a part of refrigerant is conveyed to the waste heat economizer and the fresh air tail end heat exchanger, the dehumidified fresh air is heated, and then the third control valve, a temperature and humidity sensing system and a humidifier are combined, so that the aim of accurately controlling the temperature and the humidity is fulfilled, the problems of low heating efficiency and high energy consumption of the conventional electric heating mode are solved, the energy efficiency of the system.
Drawings
The present application will be described in further detail with reference to the following drawings and detailed description.
Fig. 1 is a system schematic diagram of the energy-saving system for accurately controlling fresh air temperature and humidity during refrigeration.
Fig. 2 is a system schematic diagram of the energy-saving system for accurately controlling fresh air temperature and humidity in the heating process.
Fig. 3 is a control flow chart of the method for accurately controlling fresh air temperature and humidity according to the invention.
Fig. 4 is a detailed control flow chart of the step S2 in the method for accurately controlling fresh air temperature and humidity according to the present invention.
The figure includes:
the system comprises a compressor 1, a four-way reversing valve 2, an outdoor heat exchanger 3, a first control valve 4, a flash evaporator 5, a second control valve 6, an indoor side heat exchanger 7, a waste heat economizer 8, a humidifier 9, a fresh air tail end heat exchanger 10, a third control valve 11, a temperature and humidity sensing system 12, a first temperature and humidity sensor 121, a first temperature sensor 122, a second temperature and humidity sensor 123, a second temperature sensor 124, a fresh air fan 13 and a return air fan 14.
Detailed Description
The present application is further described in conjunction with the following examples.
Referring to fig. 1 to 4, an energy saving system for accurately controlling fresh air temperature and humidity comprises a compressor 1, a four-way reversing valve 2, an outdoor heat exchanger 3, a first control valve 4, a flash evaporator 5, a second control valve 6 and an indoor heat exchanger 7; a refrigerating or heating circulating flow path is formed among the compressor 1, the four-way reversing valve 2, the outdoor heat exchanger 3, the first control valve 4, the flash evaporator 5, the second control valve 6 and the indoor side heat exchanger 7; specifically, pipeline communication is arranged between the compressor 1 and a first port of the four-way reversing valve 2, between a second port of the four-way reversing valve 2 and the outdoor heat exchanger 3, between the outdoor heat exchanger 3 and the first control valve 4, between the first control valve 4 and the flash evaporator 5, between the flash evaporator 5 and the second control valve 6, between the second control valve 6 and the indoor side heat exchanger 7, between the indoor side heat exchanger 7 and a third port of the four-way reversing valve 2, and between a fourth port of the four-way reversing valve 2 and the compressor 1. And the air supplementing port of the flash evaporator 5 is communicated with the air suction port of the compressor 1. The energy-saving system for accurately controlling the fresh air temperature and humidity further comprises a waste heat economizer 8, a humidifier 9, a fresh air tail end heat exchanger 10, a third control valve 11 and a temperature and humidity sensing system 12. Wherein the waste heat economizer 8 is communicated with the indoor side heat exchanger 7; the humidifier 9 is arranged in the waste heat economizer 8 and is used for humidifying fresh air; the fresh air tail end heat exchanger 10 is communicated with the waste heat economizer 8 and is communicated with an outdoor side heat exchanger; the fresh air sequentially passes through the outdoor heat exchanger 3, the waste heat economizer 8 and the fresh air end heat exchanger 10; one end of a third control valve 11 is communicated with the fresh air tail end heat exchanger 10, and the other end of the third control valve is communicated with a pipeline between the second control valve 6 and the indoor side heat exchanger 7; the temperature and humidity sensing system 12 is used for detecting the temperature and humidity of fresh air passing through the outdoor heat exchanger 3, the waste heat economizer 8 and the fresh air end heat exchanger 10 so as to control and adjust the temperature and humidity of the fresh air through the first control valve 4, the second control valve 6 and the third control valve 11. The first control valve 4, the second control valve 6 and the third control valve 11 are a first expansion valve, a second expansion valve and a third expansion valve, and the first expansion valve, the second expansion valve and the third expansion valve are preferably electronic expansion valves.
This energy-saving system of accurate control new trend humiture is through on the basis of compressor 1, four-way reversing valve 2, outdoor heat exchanger 3, first control valve 4, flash vessel 5, the refrigeration or heating circulation flow path that second control valve 6 and indoor side heat exchanger 7 formed, add waste heat economizer 8 and the terminal heat exchanger 10 of new trend, the new trend passes through outdoor heat exchanger 3 in proper order, waste heat economizer 8, the terminal heat exchanger 10 of new trend, make partly refrigerant carry to waste heat economizer 8 and the terminal heat exchanger 10 of new trend, the new trend after the heating dehumidification, rethread third control valve 11, temperature and humidity sensing system 12 and humidifier 9 combine together, reach the purpose of humiture accurate control, the low problem that the heating efficiency of current electric heating mode is big has been reduced, the energy efficiency of improvement system, avoid the waste of resources, can reach energy-concerving and environment-protective effect.
This economizer system's of accurate control new trend humiture heats flow:
the refrigerant is compressed by the compressor 1 and then becomes a high-temperature high-pressure state, then flows into the indoor side heat exchanger 7 through the four-way reversing valve 2, then is divided into two paths after exiting from the indoor side heat exchanger 7, and a part of refrigerant reaches the outdoor side heat exchanger after passing through the fresh air tail end heat exchanger 10; the other part of the refrigerant enters a flash evaporator 5, the refrigerant flowing into the flash evaporator 5 is divided into two parts through the flash evaporation function, one part of the gaseous refrigerant enters a compressor 1 for supplying air, the other part of the liquid refrigerant is mixed with the refrigerant flowing out of the fresh air terminal heat exchanger 10 and then enters an outdoor side heat exchanger, and finally the refrigerant and the fresh air terminal heat exchanger return to the compressor 1 together to complete the heating cycle.
A refrigeration process:
the refrigerant is compressed by the compressor 1 and then becomes a high-temperature high-pressure state, then flows into the outdoor heat exchanger for condensation through the four-way reversing valve 2, is divided into two paths after flowing out of the outdoor heat exchanger, and part of the refrigerant flows through the fresh air tail end heat exchanger 10 for heat exchange; the other part of the refrigerant enters the flash evaporator 5 through the first control valve 4, the refrigerant flowing into the flash evaporator 5 is divided into two parts through the flash evaporation effect, one part of the gaseous refrigerant enters the compressor 1 for air supply, and the liquid refrigerant passes through the second control valve 6, is mixed with the refrigerant flowing out of the fresh air end heat exchanger 10, enters the indoor side heat exchanger 7 for heat exchange and then returns to the compressor 1, so that the circulation is completed.
The temperature and humidity sensing system 12 includes a first temperature and humidity sensor 121, a first temperature sensor 122, a second temperature and humidity sensor 123, and a second temperature sensor 124. The first temperature and humidity sensor 121 is used for detecting the temperature and the relative humidity of the fresh air inlet; the first temperature sensor 122 is used for detecting the temperature of the fresh air after heat exchange with the refrigerant, namely the temperature of the fresh air entering the waste heat economizer 8; the second temperature and humidity sensor 123 is used for detecting the temperature of the fresh air after heat exchange, humidification and dehumidification through the waste heat exchanger, namely the temperature and the relative humidity of the fresh air entering the fresh air end heat exchanger 10; the second temperature sensor 124 is used for detecting the temperature of the fresh air flowing out of the outlet of the fresh air end heat exchanger 10, namely the temperature of the fresh air entering the room.
In the present embodiment, a fresh air blower 13 is disposed on one side of the outdoor heat exchanger 3. And a return air fan 14 is arranged on one side of the waste heat economizer 8. By controlling the rotating speed of the fresh air fan 13, the flow of fresh air passing through the outdoor heat exchanger 3, the waste heat economizer 8 and the fresh air terminal heat exchanger 10 is adjusted, and the humidification quantity of the fresh air can be adjusted. And the arrangement of the return air fan 14 is beneficial to heat exchange between the waste heat economizer 8 and the return air, is convenient for heat source recycling, is used for fresh air temperature regulation, is energy-saving and environment-friendly, and avoids resource waste.
The invention provides an air conditioner which comprises an energy-saving system for accurately controlling fresh air temperature and humidity. Through setting up this economizer system of accurate control new trend humiture on the air conditioner, can reach the purpose of humiture accurate control, reduced the problem that heating efficiency of current electric heating mode is low, the energy consumption is big, improve the system efficiency, avoid the wasting of resources, can reach energy-concerving and environment-protective effect, improve the wholeness ability of air conditioner.
The invention provides a method for accurately controlling fresh air temperature and humidity, which is realized by using the energy-saving system for accurately controlling fresh air temperature and humidity, and comprises the following steps:
s1, detecting the temperature and humidity of fresh air passing through an outdoor heat exchanger 3, a waste heat economizer 8 and a fresh air tail end heat exchanger 10 to obtain the temperature T0 and the humidity N0 of a fresh air inlet;
s2, judging according to a set target temperature T and a target relative humidity N and the temperature T0 and the humidity N0 of the fresh air inlet, and determining that the system enters a refrigeration mode or a heating mode to control and adjust the temperature and the humidity of the fresh air; the method comprises the following specific steps:
s21, calculating delta T and delta N according to a set target temperature T, a target relative humidity N, and the temperature T0 and the humidity N0 of a fresh air inlet; judging according to the delta T and the delta N; the delta T is T0-T, and the delta N is N0-N.
S22, if delta T is less than 0 and delta N is less than 0, entering a heating mode to control and adjust the temperature and the humidity of fresh air; in the step S23, entering a heating mode to control and adjust the fresh air temperature and humidity specifically comprises: preliminarily setting the operation frequency of the compressor 1 according to the magnitude of the DeltaT; correcting the running frequency of the compressor 1 through the positive and negative values and the size of the delta T1; specifically, if Δ T1 is positive, the compressor 1 frequency is decreased; if Δ T1 is negative, it increases based on the original frequency, and the larger Δ T1|, the higher the correction frequency. Setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan 13; the humidification quantity is corrected according to the positive and negative values and the size of delta N2; specifically, if Δ N2 is positive, the humidifier 9 is turned off; if Δ N2 is negative, the amount of humidification increases in addition to the original amount of humidification, and the larger Δ N2|, the higher the corrected amount of humidification. The heating quantity is corrected by adjusting the second control valve 6 according to the positive and negative values and the size of the delta T2; specifically, if Δ T2 is positive, the opening degree of the second control valve 6 is decreased; if Δ T2 is negative, the opening degree of the second control valve 6 is increased. The heating capacity is corrected by adjusting the third control valve 11 according to the positive and negative values and the size of the delta T3; and finishing the adjustment. Specifically, if Δ T3 is positive, the opening degree of the third control valve 11 is decreased; if Δ T3 is negative, the opening degree of the third control valve 11 is increased.
S23, if the delta T is greater than 0 and the delta N is less than 0, entering a refrigeration mode to control and adjust the fresh air temperature and humidity; in the S24 step, entering the refrigeration mode to control and adjust the fresh air temperature and humidity specifically comprises: preliminarily setting the operation frequency of the compressor 1 according to the magnitude of the DeltaT; correcting the running frequency of the compressor 1 through the positive and negative values and the size of the delta T1; setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan 13; the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the refrigerating capacity is corrected by adjusting the second control valve 6 through the positive and negative values and the size of the delta T2; the refrigerating capacity is corrected by adjusting the third control valve 11 according to the positive and negative values and the size of the delta T3; and finishing the adjustment.
S24, if the delta T is less than 0, the delta N is more than 0; entering a heating mode to control and adjust the temperature and the humidity of fresh air; in the step S25, entering a heating mode to control and adjust the fresh air temperature and humidity specifically comprises: preliminarily setting the running frequency of the compressor 1 according to the size of the | delta T' |; correcting the running frequency of the compressor 1 through the positive and negative values and the size of the delta T1; setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan 13; the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the heating quantity is corrected by adjusting the second control valve 6 according to the positive and negative values and the size of the delta T2; the heating capacity is corrected by adjusting the third control valve 11 according to the positive and negative values and the size of the delta T3; and finishing the adjustment.
S25, if the delta T is greater than 0, the delta N is greater than 0; and entering a refrigeration mode to control and adjust the fresh air temperature and humidity. In the S26 step, entering the refrigeration mode to control and adjust the fresh air temperature and humidity specifically comprises: preliminarily setting the running frequency of the compressor 1 according to the size of the | delta T' |; correcting the running frequency of the compressor 1 through the positive and negative values and the size of the delta T1; setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan 13; the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the refrigerating capacity is corrected by adjusting the second control valve 6 through the positive and negative values and the size of the delta T2; the refrigerating capacity is corrected by adjusting the third control valve 11 according to the positive and negative values and the size of the delta T3; and finishing the adjustment.
The specific principles and methods of the step S23, the step S24, the step S25 and the step S22 are the same.
In this embodiment, the control parameters of the energy saving system for accurately controlling the fresh air temperature and humidity are as follows:
the first temperature and humidity sensor 121 is used for detecting the temperature T0, the relative humidity N0 and the dew point temperature T' of the fresh air inlet; the first temperature sensor 122 is configured to detect a temperature after heat exchange between the fresh air and the refrigerant, that is, a temperature T1 at which the fresh air enters the waste heat economizer 8; the second temperature and humidity sensor 123 is configured to detect a temperature of the fresh air after heat exchange, humidification and dehumidification by the waste heat exchanger, that is, a temperature T2 and a relative humidity N2 of the fresh air entering the fresh air end heat exchanger 10; the second temperature sensor 124 is used for detecting the temperature of the fresh air flowing out of the outlet of the fresh air end heat exchanger 10, namely the temperature T3 of the fresh air entering the room.
△T＝T0-T、△N＝N0-N、△T1＝T1-T、△T2＝T2-T、△N2＝N2-N、△T3＝T3-T、△T′＝T′-T；
In the operation of the energy-saving system for accurately controlling the fresh air temperature and humidity, if the probability of 0 appearing in the delta T, the delta N, the delta T1, the delta T2, the delta N2, the delta T3 and the delta T 'is very small, the probability can be ignored, and if the probability of 0 appearing in the delta T, the delta N, the delta T3526 and the delta T' can be continuously operated without adjusting a refrigeration mode or a heating mode. The present invention is mainly performed when Δ T, Δ N, Δ T1, Δ T2, Δ N2, Δ T3, and Δ T' are not 0.
In the method, when delta T <0 and delta N <0 are detected, namely the fresh air temperature and humidity are lower than the target values, the four-way reversing valve 2 is powered on, the system is in a heating mode, and the third control valve 11 is opened for resetting. According to the magnitude of delta T (difference between fresh air and target temperature), the compressor 1 preliminarily determines frequency operation; correcting the frequency of the compressor 1 through the positive and negative of the delta T1 (the difference between the fresh air at the outlet of the indoor side heat exchanger 7 and the target temperature), if the delta T1 is positive, indicating that the temperature of the fresh air reaches the target temperature, performing frequency reduction processing on the compressor 1, and if the delta T1 is negative, performing frequency increasing operation of different frequencies on the compressor 1 according to the size of the delta T1; fresh air heated by the indoor heat exchanger 7 enters the waste heat economizer 8, and the humidification quantity can be calculated according to the magnitude of delta N (difference between a fresh air inlet and the target relative humidity) and the rotating speed (L/m3) of the fresh air fan 13; then, the humidification quantity is corrected according to the positive and negative signs and the numerical value of the delta N2, if the delta N2 is negative, the humidity of the fresh air entering the fresh air tail end heat exchanger 10 is smaller than the target humidity, the humidification quantity is increased in a positive proportion according to the delta N2, otherwise, if the delta N2 is positive, the humidifier 9 is closed, and the humidification quantity is reduced; the fresh air finally passes through the fresh air end heat exchanger 10, the second control valve 6 is adjusted according to the positive sign and the numerical value of the delta T2, so that the flow of the refrigerant flowing into the indoor side heat exchanger 7 is controlled, the delta T2 is positive, the temperature of the fresh air which is about to enter the fresh air end heat exchanger 10 is higher than the target temperature, the opening degree of the second control valve 6 is reduced, the delta T2 is negative, the temperature of the fresh air cannot reach the target temperature, the opening degree of the second control valve 6 is increased, meanwhile, the supercooled refrigerant flows into the indoor side heat exchanger 7, and therefore the heat exchange efficiency of the system is increased; and finally, finely adjusting the third control valve 11 through the positive and negative values of the delta T3, if the delta T3 is positive, the temperature of the processed fresh air is higher than a target temperature value, at the moment, the opening degree of the third control valve 11 is reduced, the flow of high-temperature refrigerant flowing through the fresh air terminal heat exchanger 10 is reduced, the heat exchange amount is reduced, if the delta T3 is negative, different opening degrees are determined according to the value of the delta T3, the larger the value of the delta T3 is, the larger the adjusted opening degree is, and the temperature and the humidity of the fresh air are accurately controlled.
When the delta T is greater than 0 and the delta N is less than 0, namely the temperature of the fresh air is higher than the target temperature, but the humidity is lower than the target humidity, the basic principle is the same as the above, at the moment, the four-way reversing valve 2 is not electrified, the system is in a refrigeration mode, and the third control valve 11 is opened for resetting. Similarly, the compressor 1 preliminarily determines the frequency operation according to the magnitude of the delta T; correcting the frequency of the compressor 1 through the positive and negative values and the size of the delta T1; fresh air cooled by the indoor heat exchanger 7 flows into the indoor waste heat economizer 8, and the humidification quantity can be calculated according to the magnitude of delta N and the rotating speed of the fan 1; then, the humidification quantity is corrected according to the positive and negative signs and the numerical value of the delta N2, so that the humidification quantity of the humidifier 9 is finely adjusted; fresh air finally flows into the fresh air end heat exchanger 10, the second control valve 6 is adjusted according to the positive sign and the numerical value of the delta T2, so that the flow of the refrigerant flowing into the indoor side heat exchanger 7 is controlled, the final end cooling is carried out on the fresh air, meanwhile, part of supercooled refrigerant flows into the indoor side heat exchanger 7, and the heat exchange efficiency of the system is improved; and finally, the third control valve 11 is finely adjusted according to the positive and negative values and the numerical value of the delta T3, so that the temperature and the humidity of the fresh air can be accurately controlled.
When delta T <0 and delta N >0 are detected, namely the temperature of the fresh air is lower than the target temperature, but the humidity is higher than the target humidity, the basic principle is the same as the above, the four-way reversing valve 2 is electrified, the system is in a heating mode, and the third control valve 11 is opened for resetting. According to the magnitude of delta T', the compressor 1 preliminarily determines the frequency operation; then, correcting the frequency of the compressor 1 according to the positive and negative values and the size of the delta T1, and ensuring that delta N is less than 0, namely, the humidity of the fresh air inlet cannot be higher than the target humidity; fresh air heated by the indoor heat exchanger 7 flows into the indoor waste heat economizer 8, and the humidification quantity can be calculated according to the magnitude of delta N and the rotating speed of the fan; then, the humidification quantity is corrected according to the positive sign and the numerical value of the delta N2, and the humidity of the fresh air is accurately controlled; the fresh air finally flows into the fresh air tail end heat exchanger 10, the second control valve 6 is adjusted according to the positive and negative signs and the numerical value of the delta T2 so as to control the flow of the refrigerant flowing into the indoor side heat exchanger 7 and finally heat the tail end of the fresh air; and finally, the third control valve 11 is finely adjusted according to the positive and negative values and the numerical value of the delta T3, so that the temperature and the humidity of the fresh air can be accurately controlled.
When delta T is greater than 0 and delta N is greater than 0, namely the fresh air temperature and humidity are higher than the target values, the four-way reversing valve 2 is not electrified, the system is in a refrigeration mode, and the third control valve 11 is opened for resetting. According to the magnitude of the delta T', the frequency operation of the compressor 1 is preliminarily determined, and then the frequency of the compressor 1 is corrected through the positive and negative values and the magnitude of the delta T1; ensuring that the delta N is less than 0, enabling fresh air heated by the indoor side heat exchanger 7 to flow into the indoor waste heat economizer 8, calculating humidification quantity according to the size of the delta N and the rotating speed of the fan, and correcting the humidification quantity according to the positive sign and the negative sign of the delta N2, so that the humidification quantity of the humidifier 9 is finely adjusted; fresh air finally flows into the fresh air end heat exchanger 10, the second control valve 6 is adjusted by the positive sign and the numerical value of the delta T2 so as to control the flow of the refrigerant flowing into the indoor side heat exchanger 7, the fresh air is finally subjected to end cooling, and meanwhile, the supercooled refrigerant flows into the indoor side heat exchanger 7, so that the heat exchange efficiency of the system is increased; and finally, the third control valve 11 is finely adjusted according to the positive and negative values and the numerical value of the delta T3, so that the temperature and the humidity of the fresh air can be accurately controlled.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims (13)

1. An energy-saving system for accurately controlling fresh air temperature and humidity comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, a first control valve, a flash evaporator, a second control valve and an indoor side heat exchanger; a refrigerating or heating circulating flow path is formed among the compressor, the four-way reversing valve, the outdoor heat exchanger, the first control valve, the flash evaporator, the second control valve and the indoor side heat exchanger; its characterized in that, the economizer system of accurate control new trend humiture still includes:
a waste heat economizer in communication with the indoor side heat exchanger;
the humidifier is arranged in the waste heat economizer and is used for humidifying fresh air;
the fresh air tail end heat exchanger is communicated with the waste heat economizer and is communicated with the outdoor side heat exchanger; the fresh air sequentially passes through the outdoor heat exchanger, the waste heat economizer and the fresh air tail end heat exchanger;
one end of the third control valve is communicated with the fresh air tail end heat exchanger, and the other end of the third control valve is communicated with a pipeline between the second control valve and the indoor side heat exchanger;
the temperature and humidity sensing system is used for detecting the temperature and humidity of fresh air passing through the outdoor heat exchanger, the waste heat economizer and the fresh air tail end heat exchanger so as to control and regulate the temperature and the humidity of the fresh air through the first control valve, the second control valve and the third control valve;
the first temperature and humidity sensor is used for detecting the temperature and the relative humidity of the fresh air inlet;
the first temperature sensor is used for detecting the temperature of fresh air entering the waste heat economizer;
the second temperature and humidity sensor is used for detecting the temperature and the relative humidity of fresh air entering the fresh air end heat exchanger;
the second temperature sensor is used for detecting the temperature of fresh air entering the room;
the energy-saving system for accurately controlling the fresh air temperature and humidity realizes a method for accurately controlling the fresh air temperature and humidity, and the method for accurately controlling the fresh air temperature and humidity comprises the following steps:
s1, detecting the temperature and humidity of fresh air passing through an outdoor heat exchanger, a waste heat economizer and a fresh air tail end heat exchanger to obtain the temperature T0 and the humidity N0 of a fresh air inlet;
s2, judging according to a set target temperature T and a target relative humidity N and the temperature T0 and the humidity N0 of the fresh air inlet, and determining that the system enters a refrigeration mode or a heating mode to control and adjust the temperature and the humidity of the fresh air;
the method comprises the following steps of judging according to a set target temperature T, a target relative humidity N and the temperature T0 and the humidity N0 of the fresh air inlet, determining that a system enters a refrigeration mode or a heating mode to control and regulate the temperature and the humidity of fresh air, and specifically comprises the following steps:
s21, calculating delta T and delta N according to a set target temperature T, a target relative humidity N, and the temperature T0 and the humidity N0 of a fresh air inlet; judging according to the delta T and the delta N; the delta T is T0-T, and the delta N is N0-N;
s22, if delta T is less than 0 and delta N is less than 0, entering a heating mode to control and adjust the temperature and the humidity of fresh air;
s23, if the delta T is greater than 0 and the delta N is less than 0, entering a refrigeration mode to control and adjust the fresh air temperature and humidity;
s24, if the delta T is less than 0, the delta N is more than 0; entering a heating mode to control and adjust the temperature and the humidity of fresh air;
s25, if the delta T is greater than 0, the delta N is greater than 0; and entering a refrigeration mode to control and adjust the fresh air temperature and humidity.
2. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 1; the air supplementing port of the flash evaporator is communicated with an air suction port of the compressor.
3. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 1; the outdoor heat exchanger is characterized in that a fresh air fan is arranged at one side of the outdoor heat exchanger at a fresh air inlet.
4. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 1; the waste heat economizer is characterized in that a return air fan is arranged on one side of the waste heat economizer.
5. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 3; the method is characterized in that in the step S22, the step of entering a heating mode to control and adjust the fresh air temperature and humidity specifically comprises the following steps:
preliminarily setting the running frequency of the compressor according to the magnitude of the Delta T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the heating quantity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the heating quantity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
6. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 3; the method is characterized in that in the step S23, the step of entering the refrigeration mode to control and adjust the fresh air temperature and humidity specifically comprises the following steps:
preliminarily setting the running frequency of the compressor according to the magnitude of the Delta T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the refrigerating capacity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the refrigerating capacity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
7. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 3; the method is characterized in that in the step S24, the step of entering a heating mode to control and adjust the fresh air temperature and humidity specifically comprises the following steps:
preliminarily setting the running frequency of the compressor according to the size of the | delta T' |; wherein, the delta T 'is calculated by the difference between the dew point temperature T' of the fresh air inlet and the target temperature T, namely the delta T 'is T' -T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the heating quantity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the heating quantity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
8. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 3; the method is characterized in that in the step S25, the step of entering the refrigeration mode to control and adjust the fresh air temperature and humidity specifically comprises the following steps:
preliminarily setting the running frequency of the compressor according to the size of the | delta T' |; wherein, the delta T 'is calculated by the difference between the dew point temperature T' of the fresh air inlet and the target temperature T, namely the delta T 'is T' -T;
correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1; wherein Δ T1 is calculated from the difference between the temperature T1 at which fresh air enters the waste heat economizer and the target temperature T, i.e., Δ T1-T1-T;
setting the preliminary humidification quantity through the delta N and the rotating speed of the fresh air fan;
the humidification quantity is corrected according to the positive and negative values and the size of delta N2; the delta N2 is calculated by the difference between the relative humidity N2 of fresh air entering the fresh air end heat exchanger and the target relative humidity N, namely the delta N2 is equal to N2-N;
the refrigerating capacity is corrected by adjusting the second control valve according to the positive and negative values and the size of the delta T2; the delta T2 is calculated by the difference between the temperature T2 of fresh air entering the fresh air end heat exchanger and the target temperature T; namely, delta T2 is T2-T;
the refrigerating capacity is corrected by adjusting the third control valve according to the positive and negative values and the size of the delta T3; the delta T3 is calculated by the difference between the temperature T3 of fresh air entering the room and the target temperature T, namely delta T3 is equal to T3-T;
and finishing the adjustment.
9. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 5; the method is characterized in that the step of correcting the running frequency of the compressor through the positive and negative values and the size of the delta T1 specifically comprises the following steps:
if Δ T1 is positive, the compressor frequency is decreased;
if Δ T1 is negative, it increases based on the original frequency, and the larger Δ T1|, the higher the correction frequency.
10. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 5; the method is characterized in that the step of correcting the humidification quantity through the positive and negative values and the size of the delta N2 specifically comprises the following steps:
if Δ N2 is positive, turn off the humidifier;
if Δ N2 is negative, the amount of humidification increases in addition to the original amount of humidification, and the larger Δ N2|, the higher the corrected amount of humidification.
11. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 5; the method is characterized in that the correction of the heating quantity through adjusting the second control valve through the positive and negative values and the size of the delta T2 specifically comprises the following steps:
if Δ T2 is positive, decreasing the second control valve opening;
if Δ T2 is negative, the second control valve opening degree is increased.
12. The energy-saving system for accurately controlling fresh air temperature and humidity according to claim 5; the method is characterized in that the correction of the heating capacity through adjusting the third control valve through the positive and negative values and the size of the delta T3 specifically comprises the following steps:
if Δ T3 is positive, decreasing the third control valve opening;
if Δ T3 is negative, the third control valve opening degree is increased.
13. An air conditioner, characterized in that, comprising the energy-saving system for accurately controlling fresh air temperature and humidity according to any one of claims 1 to 12.
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