CN114941894A - Control method of reheating condenser and corresponding air conditioning equipment - Google Patents
Control method of reheating condenser and corresponding air conditioning equipment Download PDFInfo
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- CN114941894A CN114941894A CN202210885281.8A CN202210885281A CN114941894A CN 114941894 A CN114941894 A CN 114941894A CN 202210885281 A CN202210885281 A CN 202210885281A CN 114941894 A CN114941894 A CN 114941894A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- F24F11/77—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 by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of a reheat condenser and corresponding air conditioning equipment. The control method comprises the following steps: acquiring an air outlet temperature value; determining a target temperature difference according to the difference value of the outlet air temperature value and a preset temperature value; determining a target output gear of the reheating condenser according to the target temperature difference; and determining the working states of a plurality of electromagnetic valves corresponding to the reheat condenser according to the target output gear of the reheat condenser. The invention can controllably regulate the output capacity of the reheating condenser and stably control the high pressure of the refrigerant, thereby realizing the lean control of the air conditioning equipment.
Description
Technical Field
The invention relates to a control method of a reheat condenser, and also relates to air conditioning equipment adopting the control method, belonging to the technical field of air conditioning.
Background
In the prior art, some air conditioning systems have the requirement of reheating air supply after deep dehumidification. Moreover, users have varying demands on the supply air temperature. This requires a reheat condenser with adjustable output capacity at a given evaporator capacity.
A high-precision energy-saving constant-temperature and constant-humidity air conditioner and a control method thereof are disclosed in a Chinese invention patent with the patent number of ZL 201010220384. X. The air conditioner comprises a compressor in an air conditioner shell, a blower, an electric humidifier, an electric heater and a temperature and humidity sensor which are arranged on an air outlet, wherein a temperature and humidity control component is connected to an exhaust pipe of the compressor; the temperature and humidity control part comprises a reheating electromagnetic valve, a plurality of reheating condensers, supercooling condensers, a refrigeration electromagnetic valve and a plurality of evaporators, wherein the reheating condensers, the supercooling condensers and the refrigeration electromagnetic valve are connected in sequence, and the reheating condensers, the supercooling condensers and the refrigeration electromagnetic valve have different condensing areas. The invention recovers the condensation heat of the system by additionally arranging the reheating condenser and the evaporator, and reduces the waste heat discharge of the unit. The high-precision temperature and humidity control of the whole machine can be realized by switching the reheating electromagnetic valves of the reheating condenser and the bypass pipeline and matching with the high-precision compensation and adjustment of the electric heater and the electric humidifier.
However, there is still a lack in the art of a mature solution for the controlled adjustment of the output capacity of a reheat condenser.
Disclosure of Invention
The invention provides a control method of a reheat condenser.
Another technical problem to be solved by the present invention is to provide an air conditioning apparatus using the above control method.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to a first aspect of embodiments of the present invention, there is provided a control method of a reheat condenser, including the steps of:
acquiring an air outlet temperature value;
determining a target temperature difference according to the difference value of the outlet air temperature value and a preset temperature value;
determining a target output gear of the reheating condenser according to the target temperature difference;
and determining the working states of a plurality of electromagnetic valves corresponding to the reheat condenser according to the target output gear of the reheat condenser.
Preferably, the reheat condenser is located in an indoor unit, and the indoor unit further comprises a compressor; the control method further comprises the following steps:
controlling the plurality of electromagnetic valves to be completely opened within a first preset time length after the compressor is started;
the air outlet temperature value acquisition device specifically comprises:
and when the compressor exceeds a first preset time length after being started, periodically acquiring an air outlet temperature value.
Preferably, the determining the target output gear of the reheat condenser according to the target temperature difference specifically includes:
determining a target output gear of the reheating condenser according to the target temperature difference and a corresponding relation table of a preset temperature difference interval and output gear control information; wherein, the corresponding relation table records the corresponding relation between a plurality of temperature difference intervals and a plurality of corresponding output gear control information, and the output gear control information comprises: the output gear is increased on the basis of the original output gear, and the output gear is reduced or kept on the basis of the original output gear.
Preferably, the target output gear of the reheat condenser is determined according to the target temperature difference and a preset corresponding relation table between the temperature difference interval and the output gear control information, and the method specifically includes the following steps:
when the target temperature difference is in a first temperature difference interval, controlling the reheating condenser to be raised by 3 gears on the basis of the original output gear to obtain a target output gear of the reheating condenser;
responding to the target temperature difference in a second temperature difference interval, and controlling the reheating condenser to be raised by 2 gears on the basis of the original output gear to obtain a target output gear of the reheating condenser;
responding to the target temperature difference in a third temperature difference interval, and controlling the reheating condenser to be raised by 1 gear on the basis of the original output gear to obtain a target output gear of the reheating condenser;
responding to the target temperature difference in a fourth temperature difference interval, controlling the reheating condenser to keep a current gear to obtain a target output gear of the reheating condenser;
in response to the fact that the target temperature difference is in a fifth temperature difference interval, controlling the reheating condenser to reduce the 1 st gear on the basis of an original output gear to obtain a target output gear of the reheating condenser;
in response to the fact that the target temperature difference is in a sixth temperature difference interval, controlling the reheating condenser to reduce by 2 on the basis of an original output gear to obtain a target output gear of the reheating condenser;
in response to the fact that the target temperature difference is in a seventh temperature difference interval, controlling the reheating condenser to reduce by 3 gears on the basis of an original output gear to obtain a target output gear of the reheating condenser;
wherein, along the direction from the first temperature difference interval to the seventh temperature difference interval, the temperature value increases progressively in turn.
Preferably, the reheat condenser corresponds to a first solenoid valve, a second solenoid valve and a third solenoid valve; the first solenoid valve corresponds to a first control capacity, the second solenoid valve corresponds to a second control capacity, and the third solenoid valve corresponds to a third control capacity; the first control capacity corresponds to a first proportion of the reheat condenser's output capacity, the second control capacity corresponds to a second proportion of the reheat condenser's output capacity, and the third control capacity corresponds to a third proportion of the reheat condenser's output capacity; the sum of the first proportion, the second proportion and the third proportion is 100%; the first proportion, the second proportion and the third proportion are increased in sequence;
according to the target output gear of the reheat condenser, determining the working states of a plurality of electromagnetic valves corresponding to the reheat condenser, specifically comprising:
in response to the target output gear of the reheat condenser being a first gear, controlling the first solenoid valve to be in an open state, and controlling the second solenoid valve and the third solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a second gear, controlling the second solenoid valve to be in an open state, and controlling the first solenoid valve and the third solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a third gear, controlling the first and second solenoid valves to be in an open state and controlling the third solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a fourth gear, controlling the third solenoid valve to be in an open state, and controlling the first solenoid valve and the second solenoid valve to be in a closed state;
in response to a target output gear of the reheat condenser being a fifth gear, controlling the first solenoid valve and the third solenoid valve to be in an open state, and controlling the second solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a sixth gear, controlling the second solenoid valve and the third solenoid valve to be in an open state, and controlling the first solenoid valve to be in a closed state;
controlling the first solenoid valve, the second solenoid valve, and the third solenoid valve to be in an open state in response to a target output gear of the reheat condenser being a seventh gear.
Preferably, after the reheat condenser operates, the refrigerant chasing operation is performed every second preset time, wherein the refrigerant chasing operation executed each time specifically comprises: opening the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve and keeping the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve for a preset third preset time; the third preset time length, the first preset time length and the second preset time length are sequentially increased in an increasing mode;
and after each refrigerant chasing operation is completed, the first solenoid valve, the second solenoid valve, and the third solenoid valve are restored to the state before the current refrigerant chasing operation.
Preferably, the control method further comprises the following steps:
acquiring a pressure value through a pressure sensor;
responding to the fact that the pressure value is larger than a preset first pressure value, and increasing the 1 st gear on the basis of an original output gear of the reheating condenser;
responding to the fact that the pressure value is larger than a preset second pressure value, and immediately increasing the output gear of the reheating condenser to be the highest gear;
the second pressure value is greater than the first pressure value.
Preferably, the control method further comprises the following steps:
responding to the fact that the pressure value is in the first pressure value interval and lasts for a fourth preset time, and controlling the speed of the outdoor fan to increase by 1 gear;
controlling the speed of the outdoor fan to be kept unchanged in response to the pressure value being in a second pressure value interval;
controlling the speed of the outdoor fan to be reduced by 1 gear in response to the fact that the pressure value is in a third pressure value interval and lasts for a fourth preset time;
and the first pressure value interval, the second pressure value interval and the third pressure value interval are sequentially decreased progressively.
According to a second aspect of the embodiments of the present invention, there is provided an air conditioning apparatus, including an indoor unit and an outdoor unit, which are connected by a pipe;
the indoor unit at least comprises a reheat condenser, a compressor, an evaporator and control equipment; wherein the control apparatus executes the above control method to adjust the output capacity of the reheat condenser.
Compared with the prior art, the control method of the reheating condenser provided by the invention can controllably adjust the output capacity of the reheating condenser and stably control the high pressure of the refrigerant, thereby realizing lean control of the air conditioning equipment. The corresponding air conditioning equipment directly uses the reheat condenser to heat up cold air, avoids using electric heating to heat up, is favorable to the energy saving, and moreover, the air supply temperature is controllable, can guarantee that the air supply temperature keeps in a comfortable temperature interval constantly.
Drawings
FIG. 1 is a flow chart of a method of controlling a reheat condenser according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an air conditioning apparatus adopting the control method provided by the present invention;
FIG. 3 is a schematic structural diagram of an indoor unit of an air conditioning apparatus according to the present invention;
fig. 4 is a schematic structural view of an outdoor unit of the air conditioning apparatus according to the present invention.
The reference numbers illustrate:
20. an indoor unit;
21. a reheat condenser; 22. a compressor; 23. an evaporator; 24. a control device; 25. a fan section; 26. a gas-liquid separator; 27. a reservoir; 28a, an air outlet temperature sensor; 28b, an exhaust gas temperature sensor; 28c, an inlet air temperature sensor; 29. a pressure sensor; 211. a first solenoid valve; 212. a second solenoid valve; 213. a third electromagnetic valve;
30. an outdoor unit.
Detailed Description
The technical contents of the invention are described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a method for controlling a reheat condenser according to an embodiment of the present invention at least includes the following steps:
s110: acquiring an air outlet temperature value;
s120: determining a target temperature difference according to the difference value of the outlet air temperature value and a preset temperature value;
s130: determining a target output gear of the reheat condenser 21 according to the target temperature difference;
s140: the operating states of the plurality of solenoid valves corresponding to the reheat condenser 21 are determined based on the target output gear of the reheat condenser 21.
Preferably, the reheat condenser 21 is located in the indoor unit 20, and the indoor unit 20 further includes a compressor 22; the control method further comprises the following steps:
controlling all the electromagnetic valves to be opened within a first preset time period after the compressor 22 is started;
obtain the air-out temperature value, specifically include:
when the time length exceeds a first preset time length after the compressor 22 is started, the outlet air temperature value is periodically acquired.
In some embodiments of the present invention, determining the target output gear of the reheat condenser 21 according to the target temperature difference specifically includes:
determining a target output gear of the reheat condenser 21 according to the target temperature difference and a corresponding relation table of a preset temperature difference interval and output gear control information; wherein, the corresponding relation between a plurality of temperature difference intervals and a plurality of corresponding output gear control information is recorded in the corresponding relation table, and the output gear control information comprises: the output gear is increased on the basis of the original output gear, and the output gear is reduced or kept on the basis of the original output gear.
In some embodiments of the present invention, determining the target output gear of the reheat condenser 21 according to the target temperature difference and a preset corresponding relationship table between the temperature difference interval and the output gear control information specifically includes:
when the target temperature difference is in the first temperature difference interval, controlling the reheating condenser 21 to be raised by 3 steps on the basis of the original output step to obtain a target output step of the reheating condenser 21;
in response to the target temperature difference being in the second temperature difference interval, controlling the reheat condenser 21 to be raised by 2 steps on the basis of the original output step to obtain a target output step of the reheat condenser 21;
in response to the target temperature difference being in the third temperature difference interval, controlling the reheat condenser 21 to raise the 1 st gear on the basis of the original output gear to obtain a target output gear of the reheat condenser 21;
in response to the target temperature difference being in the fourth temperature difference interval, controlling the reheat condenser 21 to keep the current gear to obtain a target output gear of the reheat condenser 21;
in response to the target temperature difference being in the fifth temperature difference interval, controlling the reheat condenser 21 to reduce the 1 st gear on the basis of the original output gear to obtain a target output gear of the reheat condenser 21;
in response to the fact that the target temperature difference is in a sixth temperature difference interval, controlling the reheat condenser 21 to reduce by 2 on the basis of an original output gear to obtain a target output gear of the reheat condenser 21;
in response to the fact that the target temperature difference is in a seventh temperature difference interval, controlling the reheat condenser 21 to reduce by 3 on the basis of the original output gear to obtain a target output gear of the reheat condenser 21;
wherein, along the direction from the first temperature difference interval to the seventh temperature difference interval, the temperature value increases progressively in turn.
In some embodiments of the present invention, the reheat condenser 21 corresponds to the first solenoid valve 211, the second solenoid valve 212, and the third solenoid valve 213; the first solenoid valve 211 corresponds to a first control capacity, the second solenoid valve 212 corresponds to a second control capacity, and the third solenoid valve 213 corresponds to a third control capacity; the first control capacity corresponds to a first proportion of the output capacity of the reheat condenser 21, the second control capacity corresponds to a second proportion of the output capacity of the reheat condenser 21, and the third control capacity corresponds to a third proportion of the output capacity of the reheat condenser 21; the sum of the first proportion, the second proportion and the third proportion is 100 percent; the first proportion, the second proportion and the third proportion are increased in sequence;
according to the target output gear of the reheat condenser 21, determining the working states of a plurality of electromagnetic valves corresponding to the reheat condenser 21 specifically comprises:
in response to the target output gear of the reheat condenser 21 being the first gear, the first solenoid valve 211 is controlled to be in an open state, and the second solenoid valve 212 and the third solenoid valve 213 are controlled to be in a closed state;
in response to the target output stage of the reheat condenser 21 being the second stage, the second solenoid valve 212 is controlled to be in an open state, and the first solenoid valve 211 and the third solenoid valve 213 are controlled to be in a closed state;
in response to the target output stage of the reheat condenser 21 being the third stage, the first solenoid valve 211 and the second solenoid valve 212 are controlled to be in the open state, and the third solenoid valve 213 is controlled to be in the closed state;
in response to the target output stage of the reheat condenser 21 being the fourth stage, the third solenoid valve 213 is controlled to be in an open state, and the first solenoid valve 211 and the second solenoid valve 212 are controlled to be in a closed state;
in response to the target output stage of the reheat condenser 21 being the fifth stage, the first solenoid valve 211 and the third solenoid valve 213 are controlled to be in the open state, and the second solenoid valve 212 is controlled to be in the closed state;
in response to the target output stage of the reheat condenser 21 being the sixth stage, the second solenoid valve 212 and the third solenoid valve 213 are controlled to be in the open state, and the first solenoid valve 211 is controlled to be in the closed state;
in response to the target output stage of the reheat condenser 21 being the seventh stage, the first solenoid valve 211, the second solenoid valve 212, and the third solenoid valve 213 are all controlled to be in the open state.
In some embodiments of the present invention, after the reheat condenser 21 is operated, the refrigerant chasing operation is performed every second preset time period, wherein each time the refrigerant chasing operation is performed, specifically, the refrigerant chasing operation includes: opening the first solenoid valve 211, the second solenoid valve 212 and the third solenoid valve 213 for a preset third preset time period; the third preset time length, the first preset time length and the second preset time length are sequentially increased in an increasing mode;
after each refrigerant recovery operation is completed, the first solenoid valve 211, the second solenoid valve 212, and the third solenoid valve 213 are returned to the states before the current refrigerant recovery operation.
In some embodiments of the invention, the control method further comprises the steps of:
acquiring a pressure value;
raising the 1 st gear on the basis of the original output gear of the reheating condenser 21 in response to the pressure value being greater than the preset first pressure value;
immediately raising the output gear of the reheat condenser 21 to the highest gear in response to the pressure value being greater than a preset second pressure value;
wherein the second pressure value is greater than the first pressure value.
In some embodiments of the invention, the control method further comprises the steps of:
controlling the speed of the outdoor fan to increase by 1 gear in response to the fact that the pressure value is in the first pressure value interval and lasts for a fourth preset time;
controlling the speed of the outdoor fan to be kept unchanged in response to the pressure value being in the second pressure value interval;
controlling the speed of the outdoor fan to be reduced by 1 gear in response to the fact that the pressure value is in the third pressure value interval and lasts for a fourth preset time;
wherein, the first pressure value interval, the second pressure value interval and the third pressure value interval are decreased progressively in sequence.
Fig. 2 is a schematic structural diagram of an air conditioning apparatus adopting the control method provided by the present invention. FIG. 3 is a schematic view of the structure of the indoor unit of the air conditioner; fig. 4 is a schematic structural view of an outdoor unit of the air conditioner. In fig. 3 and 4, line a represents one identical line and line B represents another identical line.
Referring to fig. 2, the air conditioner includes an indoor unit 20 and an outdoor unit 30 connected by a pipe. The indoor unit 20 includes at least: the system comprises a reheat condenser 21, a compressor 22, an evaporator 23, a control device 24, a fan section 25, a gas-liquid separator 26, a liquid accumulator 27, an outlet air temperature sensor 28a, an outlet air temperature sensor 28b, an inlet air temperature sensor 28c before entering the evaporator 23, a pressure sensor 29, a first electromagnetic valve 211, a second electromagnetic valve 212 and a third electromagnetic valve 213. The above components are connected by the connection relationship shown in fig. 3. Wherein the respective individual sensors are connected to the control device 24.
In an embodiment of the present invention, the control method of the reheat condenser 21 described above may be applied to the control device 24 in a software or firmware manner. The control device 24 may be an electric cabinet hung on the indoor unit 20. The method for controlling the reheat condenser will be described in further detail below with reference to the air conditioning apparatus shown in fig. 2 to 4:
1. description of the overall function:
the intake air is cooled and dehumidified by an evaporator 23 in the indoor unit 20, and then heated by a reheat condenser 21 in the indoor unit 20 and sent out. In one embodiment of the present invention, the output capacity of the reheat condenser 21 is adjustable, so the outlet air temperature is adjustable.
2. Description of the control process:
the compressor 22 in the indoor unit 20 discharges the high-temperature gas refrigerant, and the high-temperature gas refrigerant is led to the outdoor unit and to the reheat condenser 21 in the indoor unit 20.
The reheat condenser 21 is divided into three parts in proportion, which respectively account for 15%, 30% and 55% of the whole reheat condenser 21. And three solenoid valves (solenoid valve 1, solenoid valve 2, solenoid valve 3) are used to control the opening and closing of three portions (three flow paths) in one-to-one correspondence. The number of solenoid valves is not limited to three, and a greater or lesser number of solenoid valves may be employed.
In the embodiment of the present invention, the output of 7 th gear can be performed by controlling the reheat condenser 21 by controlling the opening and closing of the solenoid valve.
Table 1: reheat condenser capacity meter
Table 2: electromagnetic valve gear corresponding meter (solid ring represents the electromagnetic valve is opened)
As can be seen from tables 1 and 2, in the 1 st gear of the reheat condenser, the control solenoid valve 1 is opened, and the control solenoid valve 2 and the control solenoid valve 3 are in a closed state;
in the 2 nd gear of the reheat condenser, the control solenoid valve 2 is in an open state, and the control solenoid valve 1 and the solenoid valve 3 are in a closed state;
in the 3 rd gear of the reheat condenser, the control solenoid valve 1 and the solenoid valve 2 are in an open state, and the control solenoid valve 3 is in a closed state;
in the 4 th gear of the reheat condenser, the control solenoid valve 3 is in an open state, and the control solenoid valve 1 and the control solenoid valve 2 are in a closed state;
in the 5 th gear of the reheat condenser, the control solenoid valve 1 and the solenoid valve 3 are in an open state, and the control solenoid valve 2 is in a closed state;
in the 6 th gear of the reheat condenser, the control solenoid valve 2 and the solenoid valve 3 are in an open state, and the control solenoid valve 1 is in a closed state;
in the 7 th gear of the reheat condenser, the control solenoid valve 1, the solenoid valve 2 and the solenoid valve 3 are all in an open state.
Air-out temperature sensor is connected with controlgear, detects the air-out temperature through air-out temperature sensor whether in setting for temperature range:
within 6min (minutes) of compressor start-up, all three solenoid valves are open.
After the compressor is started for 6min, the air outlet temperature is detected every 2min by the air outlet temperature sensor.
The target temperature difference Tn is the outlet air temperature-the set temperature.
Table 3: target temperature difference and control content corresponding relation table
When the target temperature difference Tn is less than-5 degrees, controlling the reheating condenser to be raised by 3 gears on the basis of the original gear;
when the target temperature difference Tn is greater than or equal to-5 degrees and less than-3 degrees, controlling the reheating condenser to rise by 2 steps;
when the target temperature difference Tn is greater than or equal to-3 degrees and less than-1 degree, controlling the reheating condenser to rise by 1 gear;
when the target temperature difference Tn is greater than or equal to-1 degree and less than 1 degree, controlling the reheating condenser to keep the current gear;
when the target temperature difference Tn is greater than or equal to 13 degrees and less than 3 degrees, controlling the reheating condenser to reduce the shift 1;
when the target temperature difference Tn is greater than or equal to 3 degrees and less than 5 degrees, controlling the reheating condenser to reduce by 2 steps;
and when the target temperature difference Tn is greater than or equal to 5 degrees, controlling the reheat condenser to reduce by 3 steps.
The closed loop of the electromagnetic valve is filled with liquid refrigerant, and the closed loop has no heat dissipation capacity. However, in a circuit closed for a long time, the refrigerating machine oil is accumulated along with the refrigerant.
In the embodiment of the present invention, the refrigerant discharge control is added. After the air conditioning equipment is operated, refrigerant chasing-out operation is carried out every 30min, and the electromagnetic valves 1, 2 and 3 are opened for 30 s. After the refrigerant tracing operation is finished, the state of the electromagnetic valve before the refrigerant tracing operation is recovered, and the output state of the air conditioning equipment is ensured to be close to the set value. And after the operation is carried out for 2min, the air outlet temperature is detected for the first time, and then the air outlet temperature is detected every 2 min.
High-voltage protection control: the pressure sensor is electrically connected with the control equipment, and when the pressure sensor senses that the high-pressure is larger than 3.15MPa, the gear 1 is raised according to the electromagnetic valve gear corresponding table on the basis of the existing gear. When the pressure sensor senses that the high pressure is more than 3.6MPa, the pressure is immediately increased to the highest gear. This is a protection control that uses a reheat condenser to reduce pressure to protect the compressor when the compressor pressure usage is exceeded, but also sacrifices the comfort of the air conditioner.
3. The outdoor unit is connected with the reheating condenser in parallel, the high-pressure HP is detected through the pressure sensor, the high pressure is always in a reasonable interval by controlling the rotating speed of the outdoor fan, and the control method is favorable for ensuring that the high-pressure is in a reasonable interval when the pressure is between 1.5MPa and 2.2 MPa;
when the HP is continuously detected to be more than or equal to 2.2MPa for 30s, the speed of the outdoor fan is increased by 1 gear.
When the condition that HP is more than 1.5MPa and less than 2.2MPa is met, the speed of the outdoor fan is kept. There is no need to continue the 30 second detection while maintaining the outdoor fan speed, since the fan speed would not otherwise change. Only when the fan speed needs to be changed needs continuous detection or exploration to avoid misoperation.
When HP is continuously detected to be less than or equal to 1.5MPa for 30s, the speed of the outdoor fan is reduced by 1 gear.
Compared with the prior art, the control method of the reheating condenser provided by the invention can controllably adjust the output capacity of the reheating condenser and stably control the high pressure of the refrigerant, thereby realizing the lean control of the air conditioning equipment. The corresponding air conditioning equipment directly uses the reheat condenser to heat up cold air, avoids using electric heating to heat up, is favorable to the energy saving, and moreover, the air supply temperature is controllable, can guarantee that the air supply temperature keeps in a comfortable temperature interval constantly.
The detailed description of the control method of the reheat condenser and the corresponding air conditioning equipment provided by the invention is provided above. It will be apparent to those skilled in the art that any obvious modifications thereof can be made without departing from the spirit of the invention, which infringes the patent right of the invention and bears the corresponding legal responsibility.
Claims (10)
1. A control method of a reheat condenser is characterized by comprising the following steps:
acquiring an air outlet temperature value;
determining a target temperature difference according to the difference value of the outlet air temperature value and a preset temperature value;
determining a target output gear of the reheating condenser according to the target temperature difference;
and determining the working states of a plurality of electromagnetic valves corresponding to the reheat condenser according to the target output gear of the reheat condenser.
2. The method of controlling a reheat condenser of claim 1, further comprising the steps of:
controlling the plurality of electromagnetic valves to be completely opened within a first preset time length after the compressor is started; the reheating condenser is arranged in an indoor unit, and the indoor unit further comprises the compressor.
3. The method for controlling a reheat condenser as set forth in claim 2, wherein determining a target output gear of the reheat condenser based on said target temperature difference specifically includes:
determining a target output gear of the reheating condenser according to the target temperature difference and a corresponding relation table of a preset temperature difference interval and output gear control information; wherein, the corresponding relation table records the corresponding relation between a plurality of temperature difference intervals and a plurality of corresponding output gear control information, and the output gear control information comprises: the output gear is increased on the basis of the original output gear, and the output gear is reduced or kept on the basis of the original output gear.
4. The method for controlling a reheat condenser as set forth in claim 3, wherein the determining a target output gear of the reheat condenser according to the target temperature difference and a preset correspondence table between a temperature difference interval and output gear control information includes:
responding to the target temperature difference in a first temperature difference interval, controlling the reheating condenser to be raised by 3 gears on the basis of the original output gear to obtain a target output gear of the reheating condenser;
responding to the target temperature difference in a second temperature difference interval, and controlling the reheating condenser to be raised by 2 gears on the basis of the original output gear to obtain a target output gear of the reheating condenser;
responding to the fact that the target temperature difference is in a third temperature difference interval, controlling the reheating condenser to be raised by 1 gear on the basis of an original output gear, and obtaining a target output gear of the reheating condenser;
responding to the target temperature difference in a fourth temperature difference interval, controlling the reheating condenser to keep a current gear to obtain a target output gear of the reheating condenser;
in response to the fact that the target temperature difference is in a fifth temperature difference interval, controlling the reheating condenser to reduce the 1 st gear on the basis of an original output gear to obtain a target output gear of the reheating condenser;
in response to the fact that the target temperature difference is in a sixth temperature difference interval, controlling the reheating condenser to reduce by 2 on the basis of an original output gear to obtain a target output gear of the reheating condenser;
in response to the fact that the target temperature difference is in a seventh temperature difference interval, controlling the reheating condenser to reduce by 3 gears on the basis of an original output gear to obtain a target output gear of the reheating condenser;
wherein, along the direction from the first temperature difference interval to the seventh temperature difference interval, the temperature value increases progressively in turn.
5. The control method of the reheat condenser of claim 4, wherein the reheat condenser corresponds to a first solenoid valve, a second solenoid valve and a third solenoid valve; the first solenoid valve corresponds to a first control capacity, the second solenoid valve corresponds to a second control capacity, and the third solenoid valve corresponds to a third control capacity; the first control capacity corresponds to a first proportion of the reheat condenser's output capacity, the second control capacity corresponds to a second proportion of the reheat condenser's output capacity, and the third control capacity corresponds to a third proportion of the reheat condenser's output capacity; wherein the sum of the first proportion, the second proportion and the third proportion is 100%; the first proportion, the second proportion and the third proportion are increased in sequence.
6. The reheat condenser control method as set forth in claim 5, wherein:
according to the target output gear of the reheat condenser, determining the working states of a plurality of electromagnetic valves corresponding to the reheat condenser, specifically comprising:
in response to the target output gear of the reheat condenser being a first gear, controlling the first solenoid valve to be in an open state, and controlling the second solenoid valve and the third solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a second gear, controlling the second solenoid valve to be in an open state, and controlling the first solenoid valve and the third solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a third gear, controlling the first and second solenoid valves to be in an open state and controlling the third solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a fourth gear, controlling the third solenoid valve to be in an open state, and controlling the first solenoid valve and the second solenoid valve to be in a closed state;
in response to a target output gear of the reheat condenser being a fifth gear, controlling the first solenoid valve and the third solenoid valve to be in an open state, and controlling the second solenoid valve to be in a closed state;
in response to the target output gear of the reheat condenser being a sixth gear, controlling the second solenoid valve and the third solenoid valve to be in an open state, and controlling the first solenoid valve to be in a closed state;
controlling the first solenoid valve, the second solenoid valve, and the third solenoid valve to be in an open state in response to a target output gear of the reheat condenser being a seventh gear.
7. The reheat condenser control method as set forth in claim 6, further comprising the steps of:
after the reheat condenser operates, the refrigerant chasing operation is performed every second preset time, wherein the refrigerant chasing operation is performed every time, and the method specifically comprises the following steps: opening the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve and keeping the preset third preset time period; the third preset time length, the first preset time length and the second preset time length are sequentially increased in an increasing mode;
after the refrigerant recovery operation is finished each time, the first solenoid valve, the second solenoid valve and the third solenoid valve are restored to the state before the refrigerant recovery operation this time.
8. The method of controlling a reheat condenser of claim 1, further comprising the steps of:
acquiring a pressure value;
responding to the fact that the pressure value is larger than a preset first pressure value, and increasing the 1 st gear on the basis of an original output gear of the reheating condenser;
responding to the fact that the pressure value is larger than a preset second pressure value, and immediately increasing the output gear of the reheating condenser to be the highest gear;
the second pressure value is greater than the first pressure value.
9. The reheat condenser control method as set forth in claim 8, further comprising the steps of:
responding to the fact that the pressure value is in the first pressure value interval and lasts for a fourth preset time, and controlling the speed of the outdoor fan to increase by 1 gear;
controlling the speed of the outdoor fan to be kept unchanged in response to the pressure value being in a second pressure value interval;
responding to the fact that the pressure value is in a third pressure value interval and lasts for a fourth preset time, and controlling the speed of the outdoor fan to be reduced by 1 gear;
and the first pressure value interval, the second pressure value interval and the third pressure value interval are sequentially decreased progressively.
10. The utility model provides an air conditioning equipment, includes indoor set and off-premises station, and both realize connecting through the pipeline, its characterized in that:
the indoor unit at least comprises a reheat condenser, a compressor, an evaporator and control equipment; wherein the control device executes the control method according to any one of claims 1 to 9 to adjust the output capacity of the reheat condenser.
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| CN114941894B (en) | 2022-10-28 |
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