CN116123638A - Heat pump air conditioner and operation control method thereof - Google Patents

Heat pump air conditioner and operation control method thereof Download PDF

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Publication number
CN116123638A
CN116123638A CN202310316152.1A CN202310316152A CN116123638A CN 116123638 A CN116123638 A CN 116123638A CN 202310316152 A CN202310316152 A CN 202310316152A CN 116123638 A CN116123638 A CN 116123638A
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China
Prior art keywords
air conditioner
temperature
temperature difference
heat pump
indoor
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CN202310316152.1A
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Chinese (zh)
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CN116123638B (en
Inventor
张树前
李倩
汪卫平
凌拥军
袁晓军
朱建军
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Zhejiang Zhongguang Electric Appliance Group Co Ltd
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Zhejiang Zhongguang Electric Appliance Group Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • 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

Abstract

The invention relates to an operation control method of a heat pump air conditioner, which comprises the following steps: receiving setting parameters set by a user, wherein the setting parameters comprise a setting temperature; under the refrigerating or heating operation mode, acquiring the indoor environment temperature and the set temperature, and calculating the temperature difference between the indoor environment temperature and the set temperature; if the temperature difference reaches the preset temperature difference, one or more of the rotating speed of the fan, the opening degree of the throttling mechanism and the operating frequency of the compressor are reduced, so that the refrigerating capacity or the heating capacity output quantity of the air conditioner is reduced. The invention also provides a heat pump air conditioner applying the method. By adopting the scheme, when the environment temperature of the position of the indoor unit of the air conditioner is detected to be close to the set temperature set by a user in the operation process, the output of the refrigerating capacity and the heating capacity of the air conditioner can be reduced, the speed that the indoor temperature reaches the set temperature is reduced, and the frequency of temperature-reaching shutdown of the air conditioner is reduced.

Description

Heat pump air conditioner and operation control method thereof
Technical Field
The invention relates to the technical field of heat pump air conditioners, in particular to a heat pump air conditioner capable of reducing the fluctuation of room temperature in the refrigerating or heating operation process and an operation control method thereof.
Background
The air conditioner is widely used in the work and life of people, the condition that the indoor environment temperature reaches the temperature set by a user occurs in the use process of the air conditioner, when the indoor environment temperature reaches the set temperature set by the user, the air conditioner stops running, and the air conditioner is restarted to run after the indoor environment temperature rises.
If the indoor environment temperature frequently reaches the set temperature set by the user, the air conditioner will periodically start-stop operation, the indoor environment temperature will also periodically fluctuate, and the comfort of the air conditioner in the use process will be affected.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a heat pump air conditioner and a control method thereof, which can reduce the periodic start-stop operation during the operation of the air conditioner.
An operation control method of a heat pump air conditioner, the method comprising the steps of:
receiving setting parameters set by a user, wherein the setting parameters comprise a setting temperature;
under the refrigerating or heating operation mode, acquiring the indoor environment temperature and the set temperature, and calculating the temperature difference between the indoor environment temperature and the set temperature;
if the temperature difference reaches the preset temperature difference, one or more of the rotating speed of the fan, the opening degree of the throttling mechanism and the operating frequency of the compressor are reduced, so that the refrigerating capacity or the heating capacity output quantity of the air conditioner is reduced.
Preferably, before reducing the output of the refrigerating capacity or the heating capacity of the air conditioner, the method further comprises the steps of:
counting the running time under the current running state, wherein the current running state refers to the running state which is maintained at the current fan rotating speed, the opening degree of the structural mechanism and the running frequency of the compressor;
and after judging that the running time in the current running state reaches the preset time, adjusting the output quantity for reducing the refrigerating capacity or the heating capacity of the air conditioner.
Preferably, if the temperature difference reaches the preset temperature difference, reducing the output of the refrigerating capacity or the heating capacity of the air conditioner by one or more of reducing the rotation speed of the fan, increasing the opening of the throttling mechanism and reducing the operating frequency of the compressor comprises:
if the temperature difference between the indoor environment temperature and the set temperature reaches the first temperature difference, performing first regulation control;
if the temperature difference between the indoor environment temperature and the set temperature reaches the second temperature difference, performing second regulation control;
wherein the first temperature difference is greater than the second temperature difference;
the first adjustment control includes a first adjustment control,
if the current rotation speed of the inner fan is not the lowest rotation speed, the rotation speed of the indoor fan is controlled to be reduced by one gear;
if the current rotating speed of the inner fan is the lowest rotating speed, controlling the opening of the throttling mechanism to be increased according to a first adjusting coefficient;
when the current compressor frequency is not the lowest operating frequency, the compressor frequency is adjusted to the lowest operating frequency;
the second adjustment control includes a second adjustment control,
if the current rotation speed of the inner fan is not the lowest rotation speed, the rotation speed of the inner fan is controlled to be reduced by one gear, and meanwhile, the opening of the throttling mechanism is increased according to a second adjusting coefficient;
if the current rotating speed of the inner fan is the lowest rotating speed, controlling the opening of the throttling mechanism to be increased according to a third adjusting coefficient;
wherein the first adjustment factor < the second adjustment factor < the third adjustment factor.
Preferably, in the first adjustment control process, the heat pump air conditioner preferentially adjusts the operation frequency of the compressor to the lowest operation frequency, then adjusts the rotation speed of the indoor fan, and finally adjusts the throttle degree of the throttle mechanism.
Preferably, after the cooling capacity or heating capacity of the air conditioner is reduced, if the temperature difference between the indoor environment temperature and the set temperature is detected to reach the third temperature difference, the air conditioner is controlled to stop operation.
Preferably, after detecting that the temperature difference between the indoor environment temperature and the set temperature reaches a third temperature difference and controlling the air conditioner to stop running, marking and recording the condition that the heat pump air conditioner is out of operation when the temperature difference reaches the temperature; and revising the preset temperature difference, wherein the revised preset temperature difference is larger than the preset temperature difference before revising.
It is also an object of the present application to provide a heat pump air conditioner to which the operation control method of the heat pump air conditioner as described in any one of the above is applied.
By adopting the scheme, when the environmental temperature of the position where the indoor unit of the air conditioner is located is detected to be close to the set temperature set by a user in the operation process, the output of the refrigerating capacity and the heating capacity of the air conditioner is reduced by reducing the rotating speed of the fan, increasing the opening of the throttling mechanism, reducing the operation frequency of the compressor and other modes, the speed of the indoor temperature reaching the set temperature is reduced to reduce the frequency of temperature reaching shutdown of the air conditioner, and the fluctuation of the indoor environmental temperature is avoided.
Drawings
Fig. 1 is a schematic structural view of a heat pump air conditioner according to the present application;
fig. 2 is a schematic block diagram of an indoor control mechanism and an outdoor control mechanism of a heat pump air conditioner;
FIG. 3 is one of the control logic diagrams of the present application;
FIG. 4 is a second control logic diagram of the present application;
FIG. 5 is a third schematic diagram of the control logic of the present application.
Detailed Description
Embodiments of the present invention are described in detail below.
Example 1
The present embodiment provides a heat pump air conditioner, as shown in fig. 1, the heat pump air conditioner 1 includes an indoor unit 10, an outdoor unit 20, an indoor and outdoor refrigerant link pipe 30, an indoor and outdoor refrigerant link pipe 40, and corresponding electric wires (not shown).
The indoor unit 1 comprises an indoor heat exchanger 101, an indoor environment temperature sensor 102, an indoor fan 103 and an indoor control mechanism 104. The indoor heat exchanger 101 is capable of absorbing heat from the indoor environment in the cooling operation mode or releasing heat to the indoor environment in the heating operation mode. The indoor environment temperature sensor 102 is for detecting an indoor environment temperature. The indoor fan 103 is used to exchange heat between indoor air and the indoor heat exchanger 101 during operation.
The outdoor unit 20 includes a compressor 201, a four-way reversing valve 202, an outdoor heat exchanger 203, an outdoor fan 204, an outdoor throttle mechanism 205, and an outdoor control mechanism 206. The compressor 201 is used for sucking a low-temperature low-pressure refrigerant and discharging a high-temperature high-pressure refrigerant. The four-way reversing valve 202 has two states, namely a refrigerating working state and a heating working state, and the circulating direction of the refrigerant in the loop is controlled by the four-way reversing valve 202. And an outdoor heat exchanger 203 capable of releasing heat to the outdoor environment in the cooling operation mode or absorbing heat from the outdoor environment in the heating operation mode. The outdoor fan 204 can exchange heat between the outdoor air and the outdoor heat exchanger 203 during operation. The outdoor throttle 205 can adjust the flow rate of the refrigerant passing through the circuit by adjusting the opening degree of the outdoor throttle 205, wherein the larger the opening degree of the outdoor throttle 205 is, the smaller the throttle degree is, and the larger the flow rate of the refrigerant passing through is.
As shown in fig. 2, the indoor control mechanism 101 includes a user information receiving module 1041, an indoor operation information acquiring module 1042, an indoor information transmitting/receiving module 1043, an indoor operation state control module 1044, a time counting module 1045, and an operation state information saving module 1046.
The user information receiving module 1041 is used for receiving the operation parameter information of the air conditioner set by the user.
The indoor operation information acquiring module 1042 is configured to acquire operation information of each device in the indoor unit 10 and information received by the user information receiving module 1041, such as information of indoor environment temperature acquired by the indoor environment temperature sensor 102 and information of rotational speed of the indoor fan 103.
The indoor information transmitting/receiving module 1043 is configured to transmit the operation information of the air conditioner in the indoor controller 104 to the outdoor unit controller 206, and to be able to receive the operation information of the outdoor unit from the outdoor controller 206.
An indoor operation state control module 1044 capable of controlling the operation state of each device in the indoor unit.
The time statistics module 1045 is configured to count time elapsed by the air conditioner in each operation state.
The operation state information storage module 1046 is configured to store the operation state information of the air conditioner and the operation parameter information set by the user received by the user information receiving module 1051.
The outdoor control mechanism 206 includes an outdoor operation information acquisition module 2061, an outdoor operation state control module 2062, and an outdoor information transmission/reception module 2063.
The outdoor operation information acquisition module 2061 is used for acquiring operation information of each device in the outdoor unit 20, such as acquiring information of the operation rotation speed of the compressor 201.
The outdoor operation state determination module 2062 is capable of controlling the operation state of the air conditioner outdoor unit based on the information collected by the operation information acquisition module 2061 and the information transmission/reception module 2063.
The outdoor information transmission/reception module 2063 is capable of receiving the indoor unit operation information transmitted from the indoor information transmission module 1054 in the indoor controller 105 and transmitting the operation information of the outdoor unit to the indoor unit control unit 104.
Example 2
This embodiment provides an operation control method of a heat pump air conditioner, the method including the steps of:
receiving operation parameter information of an air conditioner set by a user, wherein the operation parameter information of the air conditioner comprises a set temperature;
under the refrigerating or heating operation mode, acquiring the indoor environment temperature and the set temperature, and calculating the temperature difference between the indoor environment temperature and the set temperature;
if the temperature difference reaches the preset temperature difference, one or more of the rotating speed of the fan, the opening degree of the throttling mechanism and the operating frequency of the compressor are reduced, so that the refrigerating capacity or the heating capacity output quantity of the air conditioner is reduced.
Through the steps, when the environment temperature of the position where the indoor unit of the air conditioner is located is detected to be close to the set temperature set by a user in the operation process, the output of the refrigerating capacity and the heating capacity of the air conditioner is reduced by reducing the rotating speed of the fan, increasing the opening of the throttling mechanism, reducing the operation frequency of the compressor and the like, the frequency of temperature-reaching shutdown of the air conditioner is reduced by reducing the speed of the indoor temperature reaching the set temperature, and the fluctuation of the indoor environment temperature is avoided.
Preferably, the method further comprises: before reducing the output of the refrigerating capacity or the heating capacity of the air conditioner, the method further comprises the steps of:
counting the running time under the current running state, wherein the current running state refers to the running state which is maintained at the current fan rotating speed, the opening degree of the structural mechanism and the running frequency of the compressor;
and after judging that the running time in the current running state reaches the preset time, adjusting the output quantity for reducing the refrigerating capacity or the heating capacity of the air conditioner.
It is known to those skilled in the art that the operation state of a heat pump air conditioner is stabilized after the heat pump air conditioner is operated for a certain time in the same operation state. The operation state of the air conditioner can be readjusted by one or more operations of reducing the rotation speed of the fan, increasing the opening of the throttling mechanism and reducing the operation frequency of the compressor, so that the air conditioner is stably operated and then is adjusted by judging the time in the current operation state, and the condition that the system state of the air conditioner is not stable and always fluctuates due to the continuous adjustment can be avoided.
In this embodiment, the adjustment of the air conditioner is divided into a first adjustment control and a second adjustment control, and the preset temperature difference includes a first temperature difference and a second temperature difference. If the temperature difference reaches the preset temperature difference, reducing the output of the refrigerating capacity or the heating capacity of the air conditioner by one or more of reducing the rotating speed of the fan, increasing the opening of the throttling mechanism and reducing the operating frequency of the compressor, comprising: if the temperature difference between the indoor environment temperature and the set temperature reaches the first temperature difference, performing first regulation control; if the temperature difference between the indoor environment temperature and the set temperature reaches the second temperature difference, performing second regulation control; wherein the first temperature difference is greater than the second temperature difference, and the adjusting force of the first adjusting control is less than the adjusting force of the second adjusting control. The device can be adjusted in a mode of reducing the refrigerating capacity or the heating capacity of the air conditioner when the ambient temperature is close to the set temperature and still has a relatively large temperature difference with the set temperature; when the environment temperature is closer to the set temperature, the strength of reducing the refrigerating capacity or the heating capacity of the air conditioner is further enhanced, so that the running efficiency of the air conditioner can be ensured while the speed of reducing the indoor temperature to reach the set temperature is ensured.
In an embodiment, the first adjustment control includes controlling the indoor fan speed to decrease by one step if the current indoor fan speed is not the lowest speed; if the current rotating speed of the inner fan is the lowest rotating speed, controlling the opening of the throttling mechanism to be increased according to a first adjusting coefficient; when the current compressor frequency is not the lowest operating frequency, the compressor frequency is adjusted to the lowest operating frequency. In the first regulation and control stage, the rotation speed of the fan, the opening degree of the throttling mechanism and the frequency of the compressor are regulated in an alternative mode. Preferably, in the first regulation control process, the heat pump air conditioner preferably regulates the operation frequency of the compressor to the lowest operation frequency, then regulates the rotation speed of the indoor fan, and finally regulates the throttle degree of the throttle mechanism. The arrangement can ensure the operation efficiency of the air conditioner in the operation process preferentially in the adjustment process. The second regulation control comprises that if the current rotation speed of the inner fan is not the lowest rotation speed, the rotation speed of the inner fan is controlled to be reduced by one gear, and meanwhile, the opening of the throttling mechanism is increased according to a second regulation coefficient; if the current rotating speed of the inner fan is the lowest rotating speed, controlling the opening of the throttling mechanism to be increased according to a third adjusting coefficient; wherein the first adjustment factor < the second adjustment factor < the third adjustment factor. In this embodiment, specific settings of the first adjustment coefficient, the second adjustment coefficient, and the third adjustment coefficient are shown in table 1:
Figure SMS_1
TABLE 1
The preset temperature difference further comprises a third temperature difference, the first temperature difference is larger than the second temperature difference and larger than the third temperature difference, and after the first regulation control and the second regulation control are executed, if the temperature difference between the indoor environment temperature and the set temperature is detected to reach the third temperature difference, the air conditioner is controlled to stop running. In practical applications, even if the first adjustment control and the second adjustment control are performed, the environment temperature reaches the preset temperature, so that the air conditioner needs to be set and controlled to stop running, and the indoor environment temperature is kept at the set temperature. After detecting that the temperature difference between the indoor environment temperature and the set temperature reaches a third temperature difference and controlling the air conditioner to stop running, marking and recording the condition that the heat pump air conditioner is out of operation when the temperature difference reaches the temperature stop; and revising the preset temperature difference, wherein the revised preset temperature difference is larger than the preset temperature difference before revising. And in the subsequent operation process, judging is carried out according to the revised preset temperature difference. The first temperature difference, the second temperature difference and the third temperature difference are automatically adjusted in the operation process of the air conditioner, so that the air conditioner can enter an adjusting stage in advance in the operation process. Optionally, as shown in table 1, if the condition that the heat pump air conditioner is stopped when the temperature is too high in the current operation period is detected, the first adjustment coefficient, the second adjustment coefficient and the third adjustment coefficient are modified, and the modified adjustment coefficient is greater than the adjustment coefficient before modification, so that the opening degree of the throttle mechanism in the adjustment process is increased. The operation cycle herein refers to a complete operation process of the air conditioner from power on to power off.
As shown in fig. 3 to 5, this embodiment provides a specific control flow of the operation control of the heat pump air conditioner, and each operation step is explained below.
Step S0: in step S0, the routine is started, and then the routine proceeds to step S1;
step S1: in step S1, the air conditioner receives the operation parameters of the air conditioner set by the user, and then proceeds to step S2;
step S2: in step S2, it is determined whether the operation mode set by the user is a cooling operation mode or a heating operation mode, if the operation mode set by the user is not the cooling mode or the heating mode, step S44 is entered, otherwise step S3 is entered;
step S3: in step S3, the air conditioner operates according to the operation condition set by the user, obtains the set temperature Ts set by the user, makes the time statistics parameter t=0, and then proceeds to step S4;
step S4: in step S4, the indoor environment temperature Ti is acquired, Δt (Δt=ti-Ts during cooling operation, Δt=ts-Ti during heating operation) is calculated, and the process proceeds to step S5;
step S5: in step S5, determining whether the numerical value of the marking parameter S of the over-temperature shutdown occurs, if s=0, proceeding to step S6, otherwise proceeding to step S24;
step S6: in step S6, comparing the calculated DeltaT value with a preset threshold value a, if DeltaT is less than a, entering step S7, otherwise entering step S23;
step S7: in step S7, counting a time parameter t, acquiring indoor fan wind gear information R, acquiring a compressor running frequency F, and then entering step S8;
step S8: in step S8, comparing the counted value of the time parameter t with a preset threshold t1, if t > t1, proceeding to step S9, otherwise proceeding to step S23;
step S9: in step S9, the air conditioner adjusts the operation state of the air conditioner according to a preset program, the adjustment scheme is shown in table 1, the adjustment coefficient of the throttle mechanism is shown in table 2, and then step S10 is performed;
step S10: in step S10, let the time statistic parameter t=0, and then go to step S11;
step S11: in step S11, it is determined whether the user of the air conditioner has changed the setting parameters of the air conditioner, if the user has changed the setting parameters of the air conditioner, step S1 is entered, otherwise step S12 is entered;
step S12: in step S12, the indoor environment temperature Ti is acquired, Δt (Δt=ti-Ts during cooling operation, Δt=ts-Ti during heating operation) is calculated, and the process proceeds to step S13;
step S13: in step S13, comparing the calculated Δt value with a preset threshold b, if Δt < b, proceeding to step S15, otherwise proceeding to step S14;
step S14: in step S14, comparing the calculated Δt value with a preset threshold value a, if Δt > a, proceeding to step S3, otherwise proceeding to step S11;
step S15: in step S15, counting a time parameter t, acquiring indoor fan wind gear information R, acquiring a compressor running frequency F, and then entering step S16;
step S16: in step S16, comparing the counted value of the time parameter t with a preset threshold t2, if t > t2, proceeding to step S17, otherwise proceeding to step S12;
step S17: in step S17, the air conditioner adjusts the operation state of the air conditioner according to the preset program, the adjustment scheme is shown in table 1, the adjustment coefficient of the throttle mechanism is shown in table 2, and then step S18 is performed;
step S18: in step S18, the indoor environment temperature Ti is acquired, Δt (Δt=ti-Ts during cooling operation, Δt=ts-Ti during heating operation) is calculated, and the process proceeds to step S19;
step S19: in step S19, it is determined whether the user of the air conditioner has changed the setting parameters of the air conditioner, if the user has changed the setting parameters of the air conditioner, the process proceeds to step S1, otherwise, the process proceeds to step S20;
step S20: in step S20, comparing the calculated Δt value with a preset threshold value a, if Δt > a, proceeding to step S3, otherwise proceeding to step S21;
step S21: in step S21, comparing the calculated Δt value with a preset threshold c, if Δt < c, proceeding to step S22, otherwise proceeding to step S18;
step S22: in step S22, the compressor frequency f=0, the value s=1 of the flag parameter for the excessive temperature stop, and the process proceeds to step S41;
step S23: in step S23, it is determined whether the user of the air conditioner has changed the setting parameters of the air conditioner, if the user has changed the setting parameters of the air conditioner, step S1 is entered, otherwise step S4 is entered;
step S24: in step S24, comparing the calculated Δt value with a preset threshold a ', if Δt < a', proceeding to step S25, otherwise proceeding to step S23;
step S25: in step S25, counting a time parameter t, acquiring indoor fan wind gear information R, acquiring a compressor running frequency F, and then entering step S26;
step S26: in step S26, comparing the counted value of the time parameter t with the preset threshold t1, if t > t1, proceeding to step S27, otherwise proceeding to step S23;
step S27: in step S27, the air conditioner adjusts the operation state of the air conditioner according to the preset program, the adjustment scheme is shown in table 1, the adjustment coefficient of the throttle mechanism is shown in table 2, and then step S28 is performed;
step S28: in step S28, let the time statistic parameter t=0, and then go to step S29;
step S29: in step S29, it is determined whether the user of the air conditioner has changed the setting parameters of the air conditioner, if the user has changed the setting parameters of the air conditioner, the process proceeds to step S1, otherwise, the process proceeds to step S30;
step S30: in step S30, the indoor environment temperature Ti is acquired, Δt (Δt=ti-Ts during cooling operation, Δt=ts-Ti during heating operation) is calculated, and the process proceeds to step S31;
step S31: in step S31, comparing the calculated Δt value with a preset threshold b ', if Δt < b', proceeding to step S33, otherwise proceeding to step S32;
step S32: in step S32, comparing the calculated Δt value with a preset threshold a ', if Δt > a', proceeding to step S3, otherwise proceeding to step S29;
step S33: in step S33, counting a time parameter t, acquiring indoor fan wind gear information R, acquiring a compressor running frequency F, and then entering step S34;
step S34: in step S34, comparing the counted value of the time parameter t with a preset threshold t2, if t > t2, proceeding to step S35, otherwise proceeding to step S30;
step S35: in step S35, the air conditioner adjusts the operation state of the air conditioner according to the preset program, the adjustment scheme is shown in table 1, the adjustment coefficient of the throttle mechanism is shown in table 2, and then step S36 is performed;
step S36: in step S36, the indoor environment temperature Ti is acquired, Δt (Δt=ti-Ts during cooling operation, Δt=ts-Ti during heating operation) is calculated, and the process proceeds to step S37;
step S37: in step S37, it is determined whether the user of the air conditioner has changed the setting parameters of the air conditioner, if the user has changed the setting parameters of the air conditioner, the process proceeds to step S1, otherwise, the process proceeds to step S38;
step S38: in step S38, comparing the calculated Δt value with the magnitude of the preset threshold a ', if Δt > a', proceeding to step S3, otherwise proceeding to step S39;
step S39: in step S39, comparing the calculated Δt value with a preset threshold value c, if Δt < c, proceeding to step S40, otherwise proceeding to step S36;
step S40: in step S40, the compressor frequency f=0, and then the flow proceeds to step S41;
step S41: in step S41, the indoor environment temperature Ti is acquired, Δt (Δt=ti-Ts during cooling operation, Δt=ts-Ti during heating operation) is calculated, and the process proceeds to step S42;
step S42: in step S42, comparing the calculated Δt value with the magnitude of the preset threshold a, if Δt > a, proceeding to step S3, otherwise proceeding to step S43;
step S43: in step S43, it is determined whether the user of the air conditioner has changed the setting parameters of the air conditioner, if the user has changed the setting parameters of the air conditioner, the process proceeds to step S1, otherwise the process proceeds to step S41;
step S44: in step S44, the routine is stopped.
The symbols in the above steps are described as follows:
ts: setting a temperature;
ti: indoor ambient temperature;
Δt: difference between indoor environment temperature and set temperature, deltaT=Ti-Ts during cooling operation, deltaT=Ts-Ti during heating operation;
t: time statistics parameters;
t1: a first time judging threshold value is preset to be 1min if t 1;
t2: a second time judging threshold value is preset to be 3min if t 2;
t3: a second time judging threshold value is preset to be 5min if t 3;
a: a first temperature difference judging threshold value, wherein a is preset to be 1 ℃;
b: a second temperature difference judging threshold value, wherein a is preset to be 0 ℃;
a': a first temperature difference judgment threshold value revision value is preset to be 1.5 ℃ if a';
b': a first temperature difference judgment threshold value revision value, such as b', is preset to be 0.5 ℃;
c: a third temperature difference judging threshold value reaches Wen Tingji temperature difference judging threshold value, if c is preset to be-1 ℃;
r: the wind speed gear of the indoor fan is preset to be high-grade, medium-grade and low-grade if the fan gear is preset;
rmin: minimum wind speed gear of indoor fan;
f: compressor operation frequency, the compressor stops operating when F=0;
fmin: compressor minimum operating frequency, such as fmin=20 Hz;
s: a flag parameter of whether an over-temperature shutdown occurs, s=0 is marked as no over-reaching Wen Tingji, s=1 is marked as over-reaching Wen Tingji;
b: the throttle opening degree of the throttle mechanism is smaller as the B value is larger;
alpha: a first adjustment coefficient of the throttle degree of the throttle mechanism;
beta: a second adjustment coefficient of the throttle degree of the throttle mechanism;
gamma: and a third adjustment coefficient of the throttle degree of the throttle mechanism.
In the above method, the specific judgment of the first adjustment control and the second adjustment control and the corresponding relation of the actions of the air conditioner are shown in table 2:
Figure SMS_2
TABLE 2
The air conditioner according to embodiments 1-2 can reduce the refrigerating capacity or heating capacity output of the air conditioner through the first regulation control and the second regulation control during operation, reduce the times of temperature-reaching shutdown of the air conditioner, and avoid the occurrence of indoor temperature change fluctuation; after the first regulation control and the second regulation control are used for regulating, the air conditioner stops processing when the indoor environment temperature reaches the temperature of temperature stop anyway; when the temperature-reaching shutdown phenomenon occurs in the refrigerating or heating operation process, the air conditioner can record the temperature-reaching shutdown condition which occurs in the operation process so far, and provide reference for the subsequent revision of the operation state;
while embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (7)

1. An operation control method of a heat pump air conditioner, the method comprising the steps of:
receiving air conditioner operation parameter information set by a user, wherein the air conditioner operation parameter information comprises a set temperature;
under the refrigerating or heating operation mode, acquiring the indoor environment temperature and the set temperature, and calculating the temperature difference between the indoor environment temperature and the set temperature;
if the temperature difference reaches the preset temperature difference, one or more of the rotating speed of the fan, the opening degree of the throttling mechanism and the operating frequency of the compressor are reduced, so that the refrigerating capacity or the heating capacity output quantity of the air conditioner is reduced.
2. The operation control method of a heat pump air conditioner according to claim 1, further comprising the step of, before reducing the output of the cooling capacity or heating capacity of the air conditioner:
counting the running time under the current running state, wherein the current running state refers to the running state which is maintained at the current fan rotating speed, the opening degree of the structural mechanism and the running frequency of the compressor;
and after judging that the running time in the current running state reaches the preset time, adjusting the output quantity for reducing the refrigerating capacity or the heating capacity of the air conditioner.
3. The method according to claim 1, wherein the reducing the output of the air conditioner by one or more of reducing the fan speed, increasing the throttle opening and reducing the compressor operating frequency if the temperature difference reaches the preset temperature difference comprises:
if the temperature difference between the indoor environment temperature and the set temperature reaches the first temperature difference, performing first regulation control;
if the temperature difference between the indoor environment temperature and the set temperature reaches the second temperature difference, performing second regulation control;
wherein the first temperature difference is greater than the second temperature difference;
the first adjustment control includes a first adjustment control,
if the current rotation speed of the inner fan is not the lowest rotation speed, the rotation speed of the indoor fan is controlled to be reduced by one gear;
if the current rotating speed of the inner fan is the lowest rotating speed, controlling the opening of the throttling mechanism to be increased according to a first adjusting coefficient;
when the current compressor frequency is not the lowest operating frequency, the compressor frequency is adjusted to the lowest operating frequency;
the second adjustment control includes a second adjustment control,
if the current rotation speed of the inner fan is not the lowest rotation speed, the rotation speed of the inner fan is controlled to be reduced by one gear, and meanwhile, the opening of the throttling mechanism is increased according to a second adjusting coefficient;
if the current rotating speed of the inner fan is the lowest rotating speed, controlling the opening of the throttling mechanism to be increased according to a third adjusting coefficient;
wherein the first adjustment factor < the second adjustment factor < the third adjustment factor.
4. The operation control method of a heat pump air conditioner according to claim 3, wherein,
in the first regulation control process, the heat pump air conditioner preferentially regulates the operation frequency of the compressor to the lowest operation frequency, then regulates the rotating speed of the indoor fan, and finally regulates the throttle degree of the throttle mechanism.
5. The operation control method of a heat pump air conditioner according to claim 1 or 3, wherein after reducing the output of the cooling capacity or heating capacity of the air conditioner, if the temperature difference between the indoor environment temperature and the set temperature is detected to reach the third temperature difference, the air conditioner is controlled to stop operation.
6. The operation control method of a heat pump air conditioner according to claim 5, wherein after detecting that the temperature difference between the indoor environment temperature and the set temperature reaches a third temperature difference, the heat pump air conditioner is controlled to stop operating, and the condition that the heat pump air conditioner is out of operation when the temperature is over-reached is marked and recorded; and revising the preset temperature difference, wherein the revised preset temperature difference is larger than the preset temperature difference before revising.
7. A heat pump air conditioner, characterized by applying the operation control method of the heat pump air conditioner according to any one of claims 1 to 6.
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