CN114234301B - Dehumidifier and accumulated liquid prevention control method thereof - Google Patents

Dehumidifier and accumulated liquid prevention control method thereof Download PDF

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Publication number
CN114234301B
CN114234301B CN202111521866.3A CN202111521866A CN114234301B CN 114234301 B CN114234301 B CN 114234301B CN 202111521866 A CN202111521866 A CN 202111521866A CN 114234301 B CN114234301 B CN 114234301B
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temperature
dehumidifier
outdoor
compressor
indoor
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CN114234301A (en
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施小辉
王润棠
雷朋飞
张利
蔡锦文
江宗伦
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Guangdong PHNIX Eco Energy Solution Ltd
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Guangdong PHNIX Eco Energy Solution 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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • 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
    • F24F11/80—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
    • 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 discloses a dehumidifier and a dehumidifier effusion prevention control method, wherein the method comprises the following steps: detecting that the dehumidifier is in a heating and dehumidifying running state, and acquiring outdoor temperature and compressor power; judging whether the outdoor temperature meets a first operation condition, and if so, performing the following operations; judging whether the power of the compressor meets a second operation condition or not, and if so, controlling a dehumidifier to cool and dehumidify; and acquiring working parameters of the outdoor condenser, judging whether a third operation condition is met or not according to the working parameters, if so, controlling a dehumidifier to heat and dehumidify, otherwise, keeping the original operation state and repeating the steps. The method can automatically and forcibly switch to the cooling and dehumidifying mode to operate, convey out the refrigerant accumulated in the outdoor condenser, and avoid the influence on the normal work of the dehumidifier caused by the accumulation of a large amount of refrigerant in the coil pipe of the outdoor condenser.

Description

Dehumidifier and accumulated liquid prevention control method thereof
Technical Field
The application relates to the technical field of dehumidifier control, in particular to a dehumidifier and a control method for preventing accumulated liquid of the dehumidifier.
Background
Split type air-cooled temperature-regulating dehumidifier is often used in various indoor dehumidification processing work, and in order to satisfy the user demand in different seasons, current temperature-regulating dehumidifier generally has cooling dehumidification mode and intensification dehumidification mode, and when winter, for the comfort level of guaranteeing indoor environment, the dehumidifier generally uses intensification dehumidification mode as the main. Indoor ambient temperature is obviously higher than outdoor ambient temperature in winter, and the characteristic of refrigerant is toward low temperature department migration, when raising the temperature and dehumidifying, has the condition that outdoor ambient temperature is lower than evaporating temperature, even be in the compressor side of inhaling, low pressure gaseous state refrigerant temperature also is higher than outdoor ambient temperature, consequently low pressure gaseous state refrigerant migrates the condensation toward outdoor condenser easily this moment, this leads to the compressor suction pressure to reduce, the unit dehumidification performance reduces, the exhaust rising and then influences the machine safe operation.
Disclosure of Invention
The embodiment of the invention aims to: the dehumidifier and the anti-hydrops control method thereof are provided to ensure the normal operation of the unit.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the method for controlling the effusion prevention of the dehumidifier comprises the following steps:
detecting that the dehumidifier is in a heating and dehumidifying running state, and acquiring outdoor temperature and compressor power;
judging whether the outdoor temperature meets a first operation condition, and if so, performing the following operations;
judging whether the power of the compressor meets a second operation condition, and if so, controlling a dehumidifier to cool and dehumidify;
and acquiring working parameters of the outdoor condenser, judging whether a third operation condition is met or not according to the working parameters, if so, controlling a dehumidifier to heat and dehumidify, otherwise, keeping the original operation state.
Optionally, the first operating condition includes a temperature condition and a time condition, and the determining manner is as follows:
if the outdoor temperature is less than or equal to a first set temperature, the temperature condition is met;
if the temperature condition is met, timing and accumulating by a timer, otherwise, timing and setting the timer to zero;
the timer times more than or equal to a first set time t 1 The time condition is satisfied.
Optionally, the outdoor temperature includes: the outdoor ambient temperature T a,out And/or outdoor condenser coil temperature T c,out 。
Optionally, including obtaining indoor evaporator coil temperature T c,in The first set temperature is (T) c,in -a), said a being a preset value.
Optionally, the first set time t 1 The set range of (A) is 360 to 600 minutes, and the set range of (A) is 0 to 5 ℃.
Optionally, the second operating condition is:
Figure GDA0004018144740000021
wherein, P 1 The power parameter of the compressor is the power parameter of the compressor when the dehumidifier is in normal operation of heating and dehumidifying by the nameplate perfusion amount under the indoor current working condition; p is the real-time compressor power; p 0 The idle power parameter of the compressor is the idle power parameter when no refrigerant exists in the dehumidifier; b is a set value.
Optionally, the set range of B is 30 to 40.
Optionally, the operating parameter includes outdoor condenser coil temperature T c,out And/or forced cooling and dehumidifying operation time t;
the third operating condition is when the outdoor condenser coil temperature T c,out Not less than the second set temperature T 1 When the threshold value is exceeded or the forced cooling and dehumidifying operation time t is more than or equal to a second set time t 2 The third operating condition is satisfied at a threshold value.
Optionally, a second set temperature T 1 Is set within the range of 3-6 ℃, and the second set time t 2 The setting range of (1) to (3) minutes.
Optionally, when the third operating condition is met, the compressor does not stop, the first electromagnetic valve is opened, and a third set time t passes 3 Closing the third electromagnetic valve, maintaining the opening degree of the electronic expansion valve at C, and continuously operating for a fourth set time t 4 Then, the air conditioner enters a free running state; wherein, t 3 、C、t 4 Are all set values.
Optionally, the third set time t 3 Is 5 seconds, the setting range of C is 50 to 120 steps, and the fourth setting time t 4 Is 1 to 3 minutes.
Meanwhile, a dehumidifier is also provided, and the dehumidifier effusion prevention control method is used for operating the dehumidifier.
Optionally, the dehumidifier includes:
the temperature-raising dehumidifying loop comprises a compressor, a first electromagnetic valve, an indoor condenser, an electronic expansion valve and an indoor evaporator which are sequentially connected, wherein the output end of the indoor evaporator is connected with the input end of the compressor;
the cooling dehumidification return circuit, the cooling dehumidification return circuit is including connecting gradually compressor, third solenoid valve, outdoor condenser electronic expansion valve with indoor evaporimeter.
Optionally, a first check valve is arranged on the warming and dehumidifying loop, the first check valve is connected between the indoor condenser and the electronic expansion valve, and the conduction direction points from the indoor condenser to the electronic expansion valve;
and a second one-way valve is arranged on the cooling and dehumidifying loop, the second one-way valve is connected between the outdoor condenser and the electronic expansion valve, and the conduction direction is from the direction of the outdoor condenser to the electronic expansion valve.
Optionally, the temperature-raising dehumidification loop comprises a temperature-raising medium return branch, one end of the temperature-raising medium return branch is connected between the indoor condenser and the first one-way valve, the other end of the temperature-raising medium return branch is connected between the indoor evaporator and the compressor, and a second electromagnetic valve is arranged on the temperature-raising medium return branch;
the cooling dehumidification loop comprises a cooling return medium branch, one end of the cooling return medium branch is connected between the outdoor condenser and the second one-way valve, the other end of the cooling return medium branch is connected between the indoor evaporator and the compressor, and a fourth electromagnetic valve is arranged on the cooling return medium branch.
The beneficial effect of this application does: the invention provides a dehumidifier liquid accumulation prevention control method and a dehumidifier, wherein various working condition parameters of the operation of the dehumidifier are detected in a temperature-rising and dehumidifying operation state, when the normal operation of the dehumidifier is influenced due to the fact that a large amount of refrigerants possibly accumulated in an outdoor condenser are automatically judged according to the working condition parameters, the dehumidifier can be automatically and forcibly switched to a temperature-lowering and dehumidifying mode to operate, the refrigerants can be condensed and released in the outdoor condenser at the moment, the heating effect on the outdoor condenser is achieved, the refrigerants accumulated in the outdoor condenser can be transported out, and the influence of the large amount of refrigerants accumulated in a coil pipe of the outdoor condenser on the normal operation of the dehumidifier is avoided.
Drawings
The present application will be described in further detail below with reference to the accompanying drawings and examples.
FIG. 1 is a schematic diagram of a dehumidifier according to an embodiment of the present disclosure;
FIG. 2 is a flowchart illustrating a method for controlling an anti-liquid accumulation of a dehumidifier according to an embodiment of the present disclosure;
fig. 3 is a second flowchart of a method for controlling effusion prevention of a dehumidifier according to an embodiment of the present application.
In the figure:
100. an indoor unit; 200. an outdoor unit; 1. a compressor; 2. a first solenoid valve; 3. a third electromagnetic valve; 4. an indoor condenser; 5. a first check valve; 6. a second one-way valve; 7. a fourth solenoid valve; 8. a second solenoid valve; 9. an electronic expansion valve; 10. an indoor evaporator; 11. a gas-liquid separator; 12. an outdoor condenser; 13. an outdoor fan; 14. an indoor fan; 15. a first shut-off valve; 16. a second shut-off valve.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the embodiments of the present application clearer, the following detailed description of the technical solutions of the embodiments of the present application makes clear that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly and may for example be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
For convenience of explanation, the structure and the working principle of the dehumidifier applied by the method are explained first:
referring to fig. 1, a dehumidifier having at least functions of cooling dehumidification and heating dehumidification includes:
the temperature-raising dehumidification system comprises a temperature-raising dehumidification loop, a temperature-raising dehumidification loop and a control loop, wherein the temperature-raising dehumidification loop comprises a compressor 1, a first electromagnetic valve 2, an indoor condenser 4, an electronic expansion valve 9 and an indoor evaporator 10 which are sequentially connected, and the output end of the indoor evaporator 10 is connected with the input end of the compressor 1;
and the cooling and dehumidifying loop comprises a compressor 1, a third electromagnetic valve 3, an outdoor condenser 12, an electronic expansion valve 9 and an indoor evaporator 10 which are sequentially connected.
Then, when the temperature rise dehumidification loop is operated, the temperature rise dehumidification treatment is performed on the indoor air, and when the temperature reduction dehumidification loop is operated, the temperature reduction dehumidification treatment is performed on the indoor air.
In a specific application, the dehumidifier of the embodiment includes an indoor unit 100 and an outdoor unit 200;
the indoor unit comprises a compressor 1, an indoor condenser 4, an electronic expansion valve 9, an indoor evaporator 10, a gas-liquid separator 11 and an indoor fan 14, wherein the input end of the indoor condenser 4 is connected with the output end of the compressor 1, the output end of the indoor condenser 4 is connected with the input end of the electronic expansion valve 8, the output end of the electronic expansion valve 8 is connected with the input end of the indoor evaporator 10, the output end of the indoor evaporator is connected with the input end of the gas-liquid separator 11, and the output end of the gas-liquid separator 11 is connected with the input end of the compressor 1, so that when the indoor unit is in a temperature-rise and humidity-fall working state, a refrigerant is subjected to heat absorption evaporation in the indoor evaporator 10, is subjected to heat release condensation in the indoor condenser 4, and is driven by the indoor fan 14, indoor air is subjected to temperature reduction and dehumidification through the indoor evaporator 10 and then is heated and warmed through the indoor condenser 4;
the outdoor unit comprises an outdoor condenser 12 and an outdoor fan 13, wherein the input end of the outdoor condenser 12 is connected with the output end of the compressor 1, and the output end of the outdoor condenser is connected with the input end of the electronic expansion valve 9, so that when the outdoor unit is in a cooling and dehumidifying working state, a refrigerant is subjected to heat absorption and evaporation in the indoor evaporator 10, heat is released and condensed in the outdoor condenser 12, under the driving of the indoor fan 14, indoor air is cooled and dehumidified by the indoor evaporator 10, under the driving of the outdoor fan 14, the outdoor air is heated and warmed by the outdoor condenser 12, and at the moment, the outdoor condenser 12 is also heated by the refrigerant to warm.
In order to realize the control of the operation mode, a first electromagnetic valve 2 is arranged between a compressor 1 and an indoor condenser 4, a third electromagnetic valve 3 is arranged between the compressor 1 and an outdoor condenser 12, when the cooling and dehumidifying mode needs to be operated, the first electromagnetic valve 2 is closed, the third electromagnetic valve 3 is opened at the same time, at the moment, the loop of the indoor condenser 4 is closed, the loop of the outdoor condenser 12 is opened, and a dehumidifier performs cooling and dehumidifying operation; when the heating and dehumidifying mode needs to be operated, the first electromagnetic valve 2 is opened, the third electromagnetic valve 3 is closed, the indoor condenser 4 loop is opened, the outdoor condenser 12 loop is closed, and the dehumidifier performs heating and dehumidifying operation.
Further, a first check valve 5 is arranged on the warming and dehumidifying loop, the first check valve 5 is connected between the indoor condenser 4 and the electronic expansion valve 9, and the conduction direction points from the indoor condenser 4 to the electronic expansion valve 9;
and a second one-way valve is arranged on the cooling and dehumidifying loop, the second one-way valve is connected between the outdoor condenser and the electronic expansion valve 9, and the conduction direction is from the direction of the outdoor condenser to the electronic expansion valve 9. Specifically, in order to prevent the refrigerant from flowing backwards, a first one-way valve 5 pointing to the electronic expansion valve 9 to be opened is arranged between the indoor condenser 4 and the electronic expansion valve 9, a second one-way valve 6 pointing to the electronic expansion valve 9 to be opened is arranged between the outdoor condenser 12 and the electronic expansion valve 9, and the second one-way valve 6 can prevent the refrigerant from entering the outdoor condenser 12 from a loop where the refrigerant is located when the heating dehumidification mode is operated; in the cooling and dehumidifying mode, the first check valve 5 prevents the refrigerant from entering the indoor condenser 4 from the loop in which the refrigerant is located.
When the outdoor condenser 12/the indoor condenser 4 is operated in any one of the heating dehumidification or the cooling dehumidification modes, although the third electromagnetic valve 3/the first electromagnetic valve 2 is turned off, the third electromagnetic valve 3/the first electromagnetic valve 2 is in a severe working condition of high temperature at the exhaust side of the compressor 1 for a long time, and the third electromagnetic valve 3/the first electromagnetic valve 2 is easy to leak refrigerant, so that the refrigerant is accumulated in the outdoor condenser 12/the indoor condenser 4 which is idle, and the situation is more serious particularly in winter when the outdoor environment temperature is low.
Therefore, in order to recover the refrigerant accumulated in the outdoor condenser 12/indoor condenser 4 which is idle, the following measures are taken in the present embodiment:
the temperature-raising dehumidification loop comprises a temperature-raising medium returning branch, one end of the temperature-raising medium returning branch is connected between the indoor condenser 4 and the first one-way valve 5, the other end of the temperature-raising medium returning branch is connected between the indoor evaporator 10 and the compressor 1, and a fourth electromagnetic valve 7 is arranged on the temperature-raising medium returning branch;
the cooling dehumidification loop comprises a cooling medium return branch, one end of the cooling medium return branch is connected between the outdoor condenser 12 and the second one-way valve 6, the other end of the cooling medium return branch is connected between the indoor evaporator 10 and the compressor 1, and the cooling medium return branch is provided with a second electromagnetic valve 8.
In the case of the operation in the temperature-raising dehumidification mode, a pipeline is provided between the output end of the outdoor condenser 12 and the input end of the gas-liquid separator 11, and the second solenoid valve 8 is provided in the pipeline, so that even if the refrigerant leaks into the outdoor condenser 12 through the first solenoid valve 8 during the operation, the refrigerant stored in the outdoor condenser 12 can be recovered to the indoor circulation pipeline through the second solenoid valve 8. It should be noted that the refrigerant between the interior condenser 4 and the electronic expansion valve 9 is a high-pressure liquid refrigerant, that is, the output side of the second check valve 6 is at a high pressure, so that the low-pressure refrigerant in the exterior condenser 12 cannot flow into the indoor circulation line through the second check valve 6, and the low-pressure refrigerant in the exterior condenser 12 can be recovered only by the second solenoid valve 8. Then, the first solenoid valve 2 and the second solenoid valve 8 are simultaneously opened while the warming dehumidification mode is operated.
Similarly, a pipeline for recovering the refrigerant in the indoor condenser 4 is arranged between the output end of the indoor condenser 4 and the input end of the gas-liquid separator 11, a fourth electromagnetic valve 7 is arranged in the pipeline, when the cooling and dehumidifying mode is operated, the third electromagnetic valve 3 and the fourth electromagnetic valve 7 are simultaneously opened, and the first electromagnetic valve 2 and the second electromagnetic valve 8 are simultaneously closed.
The indoor unit and the outdoor unit are split machines, a first stop valve 15 and a second stop valve 16 are respectively arranged at two ends of a pipeline of the indoor unit, the first stop valve 15 and the second stop valve 16 can close the pipeline of the indoor unit before installation, and the indoor unit and the outdoor unit can be operated by opening the first stop valve 15 and the second stop valve 16 after connection.
Based on the above structure, the principle of the dehumidifier of this embodiment when heating up and dehumidifying is:
the first electromagnetic valve 2 and the second electromagnetic valve 8 are opened, the third electromagnetic valve 3 and the fourth electromagnetic valve 7 are closed, and the heat release of the refrigerant in the indoor condenser 4 consists of three parts: (1) sensible heat given off from the indoor air on the indoor evaporator 10; (2) latent heat of condensation of moisture condensed by the indoor air on the indoor evaporator 10; (3) the compression work of the compressor 1; sensible heat released by the indoor air flow after being cooled on the indoor evaporator 10 is the same as heat released by the (1) th part of the indoor condenser 4, and heat released by the (2) th part and the (3) th part of the indoor condenser 4 form net heating on the indoor air, so that the heating and warming effects on the indoor air are achieved, and water vapor of the indoor air is condensed and separated out in the indoor evaporator 10, so that the heating and dehumidifying effects on the indoor air are achieved on the whole.
Although the dehumidifier can heat and dehumidify indoor air in winter, the indoor environment temperature is obviously higher than the outdoor environment temperature in winter, the refrigerant is characterized by migrating to a low temperature position, when heating and dehumidifying, the outdoor environment temperature is lower than the evaporation temperature, even if the dehumidifier is positioned at the air suction side of the compressor, the temperature of the low-pressure gaseous refrigerant is higher than the outdoor environment temperature, so that the low-pressure gaseous refrigerant is easy to migrate and condense to an outdoor condenser, the air suction pressure of the compressor is reduced, the dehumidifying performance of a unit is reduced, and the exhaust is increased to further influence the safe operation of the machine.
In order to solve the above problem, this embodiment provides a method for controlling an effusion prevention of a dehumidifier, including the steps of:
s1, detecting that a dehumidifier is in a heating and dehumidifying running state, and acquiring outdoor temperature and compressor power;
specifically, the situation that the outdoor condenser 12 sucks the refrigerant in the indoor pipeline backwards generally occurs, which is caused by that the coil temperature of the outdoor condenser 12 is too low due to too low outdoor temperature, and the refrigerant with higher temperature automatically migrates to the outdoor condenser 12 with lower temperature, so that the method needs to combine judgment after obtaining the outdoor temperature, the outdoor temperature reflects the temperature of the coil of the outdoor condenser 12, and the possibility of refrigerant migration exists when the outdoor temperature is too low;
on the other hand, the migration of the refrigerant to the exterior condenser 12 causes problems such as: the suction pressure of the compressor is reduced, the dehumidification capacity of the unit is reduced, and in order to enhance the dehumidification capacity, the indoor fan 14 automatically increases the power to accelerate the air flow, and the air exhaust is too high, so that the safe operation of the machine is affected. Therefore, the power of the compressor 1 reflects the running state of the unit, and the unstable running condition of the unit can be caused only when the power of the compressor 1 is obviously too low, namely the reduction of the suction pressure of the compressor is reflected, so that the excessive refrigerants are stored in the coil pipe of the outdoor condenser 12, and therefore the running state of the unit is judged by combining the power of the compressor, and corresponding regulation and control are made according to the judgment result;
the outdoor temperature and the compressor power can be obtained continuously, and a timing obtaining method can also be adopted.
S2, judging whether the outdoor temperature meets a first operation condition or not, and if so, performing the following operations;
specifically, the outdoor temperature is firstly used for judging, other operations are carried out after the possibility of the refrigerant migration is judged, and if the possibility of the refrigerant migration is judged to be small or low according to the outdoor temperature, the next operation is not needed, and the operation is only carried out in a stable state at present;
specifically, when the obtained room temperature parameter satisfies any condition, the refrigerant in the indoor pipeline may migrate out, or the refrigerant in the indoor pipeline may migrate out too much to cause too much refrigerant to be stored in the coil of the outdoor condenser 12, and the "any condition" in this paragraph may be set as the first operating condition in this embodiment.
S3, judging whether the power of the compressor meets a second operation condition or not, and if so, controlling a dehumidifier to cool and dehumidify;
specifically, after the step S2 judges that there is a possibility that the refrigerant in the indoor pipeline migrates outside or the refrigerant migrates outside too much to cause the refrigerant accumulated in the coil of the outdoor condenser 12 to be too much, it indicates that there is a great possibility that the refrigerant in the indoor pipeline is too little to affect the compressor power, so this step makes a judgment according to the compressor power, and when the compressor power is abnormal, it indicates that the great possibility is caused by the refrigerant migrates outside too much, and the unit can make a corresponding adjustment according to the problem; if the power of the compressor is normal, the condition of refrigerant migration does not exist, or the refrigerant migration is low, and the influence on the normal operation of the unit is not enough, so that the normal operation state is only required to be maintained;
when it is determined that the unit cannot normally operate due to excessive refrigerant migration, the present embodiment performs an automatic forced cooling and dehumidifying operation, in this mode, the outdoor condenser 12 is completely conducted, the gas refrigerant condenses and releases heat in the outdoor condenser 12 to heat the coil of the outdoor condenser 12, and more importantly, the refrigerant accumulated in the coil is dredged and guided out during the flowing process of the gas refrigerant in the outdoor condenser 12, so as to solve the problem of refrigerant accumulation in the outdoor condenser 12;
the second operating condition may also be manually set according to experience and experimental results, and specifically, when the power of the compressor meets any condition, it indicates that the compressor may be affected by too little refrigerant in the pipeline, and at this time, it indicates that the refrigerant may be too much accumulated in the coil of the outdoor condenser 12, and the "any condition" in this paragraph may be set as the second operating condition in this embodiment.
And S4, acquiring working parameters of the outdoor condenser, judging whether a third operation condition is met or not according to the working parameters, if so, controlling a dehumidifier to heat and dehumidify, otherwise, keeping the original operation state and repeating the steps.
After the forced cooling and dehumidifying operation, the refrigerant stored in the outdoor condenser 12 is gradually drained and guided out, and the working parameters of the outdoor condenser 12 are also changed continuously, mainly the temperature of the outdoor condenser 12 and the state and capacity of the refrigerant in the coil pipe. The working parameters of the outdoor condenser 12 can reflect the condition that the refrigerant stored in the coil pipe is drained, when the working parameters of the outdoor condenser 12 change to a certain degree, the stored refrigerant can be shown to be drained completely, the forced cooling and dehumidifying operation can be automatically quitted, and the heating and dehumidifying operation is carried out to provide heating for the indoor space. The third operating condition can also be set manually according to experience and experimental results.
Further, the first operating condition includes a temperature condition and a time condition, and the determining method is as follows:
if the outdoor temperature is less than or equal to a first set temperature, the temperature condition is met;
if the temperature condition is met, timing and accumulating by a timer, otherwise, timing and setting the timer to zero;
the timer times more than or equal to a first set time t 1 The time condition is satisfied.
Specifically, since the outdoor temperature is in a constantly changing state, and the amount of the refrigerant that is accumulated in the coil of the outdoor condenser 12 after the refrigerant moves outside is enough time to be sufficient, the moving direction of the refrigerant may be affected during the outdoor temperature changing process. Therefore, the first operating condition of the scheme not only includes the temperature condition, but also adds the judgment of the time condition.
The specific judgment method is as follows: the first set temperature is set manually according to experience and experimental results, and generally, when the outdoor temperature is below the first set temperature, the coil temperature of the outdoor condenser 12 is lower than the temperature of the indoor low-pressure gaseous refrigerant, and the refrigerant migrates to the outdoor condenser 12 for condensation in a natural state. If the temperature condition is met, the timer counts time and accumulates, the outdoor temperature may change along with the time transition, if the outdoor temperature is stable under the first set temperature in the process, the situation that the refrigerant continuously moves outwards is indicated, and when the duration reaches the first set time t 1 If the refrigerant is accumulated in the exterior condenser 12 too much, the normal operation of the unit is affected, and therefore the next determination procedure can be performed. If the outdoor temperature increases to above the first set temperature, the coil temperature of the outdoor condenser 12 is higher than the temperature of other indoor low-pressure refrigerants, and the refrigerants can move inside naturally, so that the timing can be directly set to zero.
Therefore, the first operating condition described in the present embodiment can be understood as when the outdoor temperature is continuously maintained for the first set time t 1 When the temperature is maintained below the first set temperature, the first operating condition is determined to be satisfied. The scheme combines the temperature condition and the time condition for judgmentThe method can ensure that whether the unit operation is influenced by the refrigerant capacity is judged under the condition that the storage capacity in the coil of the outdoor condenser 12 is enough, so that the possibility of misjudgment is reduced, the triggering rate of forced cooling and dehumidifying can be reduced, and the situation that the indoor temperature is reduced due to the fact that the forced cooling and dehumidifying is triggered is avoided as much as possible.
As a preferred embodiment of this embodiment, the outdoor temperature includes: the outdoor ambient temperature T a,out And/or outdoor condenser coil temperature T c,out 。
Specifically, in the heating and dehumidifying mode, the outdoor condenser 12 is in a blocking state, and the temperature of the coil thereof is mainly determined by the outdoor ambient temperature T a,out Therefore, the outdoor temperature in this embodiment may be selected as the outdoor ambient temperature T a,out Or directly the outdoor condenser coil temperature T c,out When obtaining the temperature measurement, only one of the two can be obtained, or both can be obtained at the same time, and when making the judgment, only T is needed a,out And T c,out If any one of the temperature values is lower than the first set temperature, the temperature condition is satisfied.
Wherein, can directly set up first temperature sensor control ambient temperature in outdoor unit in order to acquire outdoor ambient temperature T a,out A second temperature sensor may be disposed on the surface of the coil 12 to monitor the coil temperature to obtain the coil temperature T of the outdoor condenser c,out 。
As a preferred embodiment of the present embodiment, the method includes obtaining the indoor evaporator coil temperature T c,in The first set temperature is (T) c,in -a), said a being a preset value.
In particular, the indoor evaporator coil temperature T c,in Reflects the temperature of the low-pressure gaseous refrigerant (i.e. the refrigerant at the outlet of the indoor evaporator 10), and whether the refrigerant moves back to the outdoor condenser 12 depends on the temperature T of the condenser coil c,out The temperature difference between the refrigerant and the indoor low-pressure gaseous refrigerant is when the temperature T of the coil pipe of the condenser c,out When the temperature of the refrigerant is lower than the temperature of the indoor low-pressure gaseous refrigerant, the indoor low-pressure gaseous refrigerant can move outwards. Therefore, thisExample with indoor evaporator coil temperature T c,in Representing the temperature of the low-pressure gaseous refrigerant in the room as the coil temperature T of the evaporator in the room c,in As the setting reference of the first setting temperature, the accuracy of judging whether the refrigerant is migrated outside can be ensured. Wherein, a third temperature sensor can be set at the outlet end of the indoor evaporator 10 to monitor the temperature of the indoor evaporator 10 to obtain the indoor evaporator coil temperature T c,in 。
The first set temperature is specifically (T) c,in -a), the constant a can be set in connection with the actual situation.
Illustratively, the first set time t 1 The set range of (A) is 360 to 600 minutes, and the set range of (A) is 0 to 5 ℃.
Specifically, the first set time t 1 And the refrigerant migration speed determines the refrigerant accumulation of the coil pipe in the outdoor condenser 12, so that the first set time t 1 The setting of the dehumidifier mainly depends on factors such as the volume of the dehumidifier, the pipe diameter of a refrigerant pipeline, the internal and external temperature difference and the like, and the inventor verifies through multiple experiments that the first set time t is 1 The setting range of (c) is preferably 360 to 600 minutes.
The setting of A determines the temperature difference between the coil pipe of the outdoor condenser 12 and the low-pressure gaseous refrigerant when the forced cooling and dehumidifying conditions are started, the larger the A is, the larger the starting temperature difference is, the serious experiments are carried out by the inventor for many times, and the setting range of A is more suitable to be 0-5 ℃.
As for the second operating condition of step S3, it is preferable that:
Figure GDA0004018144740000141
wherein, P 1 The power parameter of the compressor is the power parameter of the compressor when the dehumidifier is in normal operation of heating and dehumidifying by the nameplate perfusion amount under the indoor current working condition; p is the real-time compressor power; p 0 The idle power parameter of the compressor is the idle power parameter when no refrigerant exists in the dehumidifier; b is a set value.
In particular, P 1 The power parameter of the compressor when the dehumidifier is in normal operation of heating and dehumidifying by the nameplate perfusion amount under the indoor current working condition indicates that the dehumidifier chamber is in the same set temperature and environment temperature conditionThe inner unit operates independently and is not influenced by the outdoor unit, the refrigerant in the refrigerant pipe of the indoor unit is the filling amount of the nameplate, and the operating power of the compressor 1 is P 1 ，P 1 Can establish the functional relation P through experiments 1 ＝f(T a,in ,F speed ). For convenience of understanding, it can be understood that the outdoor unit is completely removed, two ports of the indoor unit are connected with each other, the refrigerant nameplate filling amount is filled in the indoor unit, and the power of the compressor operation is the above P 1 。
P 0 When no refrigerant exists in the dehumidifier, the idling power parameter of the compressor shows that when the refrigerant is completely transferred to the outdoor unit and the refrigerant is completely absent in the indoor unit, the running power of the compressor is P 0 。
P is the actual detected compressor power, formula
Figure GDA0004018144740000142
The ratio of the power of the compressor actually driving the operation of the refrigerant in the pipeline of the indoor unit to the power of the compressor theoretically driving the refrigerant of the nameplate filling amount to operate is shown, namely the ratio of the refrigerant stored in the outdoor unit is reflected, meanwhile, the influence degree of the compressor operation by the migration of the refrigerant is reflected, and further the operation state of the dehumidifier is reflected.
Therefore, based on the determination of the second operation condition in this embodiment, the influence of the refrigerant migration on the dehumidifier can be accurately reflected, and when the influence is too large, the dehumidifier can automatically and forcibly perform cooling and dehumidifying operation to dredge the refrigerant.
As proved by a plurality of experiments of the inventor, the setting range of B is preferably 30 to 40.
And step S4, aiming at timely judging that the refrigerant stored in the outdoor condenser 12 is drained completely, ensuring that the temperature rise and dehumidification operation can be timely switched back to meet the indoor heating requirement, and judging and determining working parameters of the outdoor condenser, so that the timely degree of temperature rise and dehumidification switching is determined by reasonable selection of the working parameters.
Preferably, the operating parameter includes outdoor condenser coil temperature T c,out And/or strongA cooling and dehumidifying operation time T, the third operation condition being that the outdoor condenser coil temperature T is set c,out Not less than the second set temperature T 1 The threshold value or the forced cooling and dehumidifying operation time t is more than or equal to a second set time t 2 The third operating condition is satisfied at a threshold value, wherein T 1 And t 2 Are all set values.
When the cooling and dehumidifying operation is performed, the refrigerant is condensed and released in the outdoor condenser 12, the temperature of the outdoor condenser 12 rises, and the temperature T of the coil pipe of the outdoor condenser is calculated c,out For the criterion, when the outdoor condenser coil temperature T c,out The temperature rises to a second set temperature T 1 When the refrigerant is guided, the refrigerant in the pipeline is guided; wherein, the outdoor condenser coil temperature T c,out The real-time temperature may be continuously obtained in step S1, or may be obtained only when step S4 is performed.
Or when the forced cooling and dehumidifying operation time t reaches the second set time t 2 Even if the outdoor temperature is too low, the condenser 12 is not heated to the second set temperature T 1 At this time, the forced cooling and dehumidification can be directly quitted. Wherein the second set time t 2 The power consumption of the unit and the length of the pipeline path are mainly determined.
Through multiple times of experiments and verification of the inventor, the second set temperature T 1 Is set within the range of 3-6 ℃, and the second set time t 2 The setting range of (1) to (3) minutes.
Further, when the third operating condition is satisfied, the compressor does not stop, the first electromagnetic valve 2 is opened, and a third set time t passes 3 Closing the third electromagnetic valve 3, maintaining the opening degree of the electronic expansion valve at C, and continuously operating for a fourth set time t 4 Then, the air conditioner enters a free running state; wherein, t 3 、C、t 4 Are all set values.
That is, after the forced cooling and dehumidification is exited, the unit does not immediately enter the automatically controlled heating and dehumidifying operation, but keeps the third electromagnetic valve 3 open for the third set time t while opening the first electromagnetic valve 2 3 Then it is closed, at the same time the pipeline of outdoor condenser 12 also is kept in conduction, and its operation processThe intermediate compressor 1 can continue to pump the refrigerant in the outdoor condenser 12, so that the refrigerant in the outdoor condenser 12 can quickly flow back to the indoor loop, and in the process, the opening degree of the electronic expansion valve is kept at C to ensure the smoothness of the refrigerant. Therefore, the refrigerant in the outdoor condenser 12 can be fully recovered to the indoor pipeline by the method, so that the normal operation of the unit in the heating and dehumidifying mode is ensured.
After a plurality of times of experiments of the inventor, the preferable third set time t 3 Is 5 seconds, the setting range of C is 50 to 120 steps, and the fourth setting time t 4 For 1 to 3 minutes.
After the steps, the dehumidifier enters the freely controlled heating and dehumidifying work, and in the mode, the electronic expansion valve, the compressor and the indoor fan are all independently regulated and controlled by the unit.
In summary, the present embodiment provides a method for controlling an effusion prevention of a dehumidifier, which detects various operating condition parameters of the dehumidifier in a temperature-rising and dehumidifying operation state, and when it is automatically determined according to the operating condition parameters that a large amount of refrigerant may be stored in an outdoor condenser and normal operation of the dehumidifier is affected, the dehumidifier can be automatically and forcibly switched to a temperature-lowering and dehumidifying mode for operation, at this time, the refrigerant can be condensed and released in the outdoor condenser, a heating effect is exerted on the outdoor condenser, and the refrigerant stored in the outdoor condenser can be transported out, so that the phenomenon that the normal operation of the dehumidifier is affected due to the large amount of refrigerant stored in a coil of the outdoor condenser is avoided.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship merely for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principles of the present application have been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of the present application.

Claims (12)

1. The utility model provides a dehumidifier prevents hydrops control method which characterized in that:
detecting that the dehumidifier is in a heating and dehumidifying running state, and acquiring outdoor temperature and compressor power;
judging whether the outdoor temperature meets a first operation condition, and if so, performing the following operations;
judging whether the power of the compressor meets a second operation condition, and if so, controlling a dehumidifier to cool and dehumidify;
acquiring working parameters of the outdoor condenser, judging whether a third operation condition is met or not according to the working parameters, if so, controlling a dehumidifier to heat and dehumidify, otherwise, keeping the original operation state;
wherein, the first operation condition comprises a temperature condition and a time condition, and the judgment mode is as follows:
if the outdoor temperature is less than or equal to a first set temperature, the temperature condition is met;
if the temperature condition is met, timing and accumulating by a timer, otherwise, timing and setting the timer to be zero;
the timer times more than or equal to a first set time t 1 If so, the time condition is met;
the second operating conditions are:
Figure FDA0004018144730000011
wherein, P 1 The power parameter of the compressor is the power parameter of the compressor when the dehumidifier is in normal operation of heating and dehumidifying by the nameplate perfusion amount under the indoor current working condition; p is the real-time compressor power; p 0 The idle power parameter of the compressor is the idle power parameter when no refrigerant exists in the dehumidifier; b is a set value;
the operating parameters include outdoor condenser coil temperature T c,out And/or forced cooling and dehumidifying operation time t;
the third operating condition is when the outdoor condenser coil temperature T c,out Not less than the second set temperature T 1 When the threshold value is exceeded or the forced cooling and dehumidifying operation time t is more than or equal to a second set time t 2 The third operating condition is satisfied at a threshold value.
2. The anti-hydrops control method of the dehumidifier according to claim 1, wherein:
the outdoor temperature includes: outdoor ambient temperature T a,out And/or outdoor condenser coil temperature T c,out 。
3. The dehumidifier hydrops-preventing control method according to claim 2, wherein: including obtaining indoor evaporator coil temperature T c,in The first set temperature is (T) c,in -a), said a being a preset value.
4. The dehumidifier hydrops-preventing control method according to claim 3, wherein:
the first set time t 1 The setting range of (A) is 360-600 minutes, and the setting range of (A) is 0 to up5℃。
5. The anti-hydrops control method of the dehumidifier according to claim 1, wherein: the set range of B is 30 to 40.
6. The anti-hydrops control method of the dehumidifier according to claim 1, wherein:
second set temperature T 1 Is set within the range of 3-6 ℃, and the second set time t 2 The setting range of (1) to (3) minutes.
7. The anti-hydrops control method of the dehumidifier according to claim 1, wherein:
when the third running condition is met, the compressor does not stop, the first electromagnetic valve is opened, and the third set time t is passed 3 Closing the third electromagnetic valve, maintaining the opening degree of the electronic expansion valve at C, and continuously operating for a fourth set time t 4 Then, the air conditioner enters a free running state; wherein, t 3 、C、t 4 Are all set values.
8. The dehumidifier hydrops-preventing control method according to claim 7, wherein:
the third set time t 3 Is 5 seconds, the setting range of C is 50 to 120 steps, and the fourth setting time t 4 Is 1 to 3 minutes.
9. A dehumidifier is characterized in that:
a method for operating a dehumidifier anti-hydrops control as claimed in any one of claims 1 to 8.
10. The dehumidifier of claim 9, comprising:
the temperature-raising dehumidifying loop comprises a compressor, a first electromagnetic valve, an indoor condenser, an electronic expansion valve and an indoor evaporator which are sequentially connected, wherein the output end of the indoor evaporator is connected with the input end of the compressor;
the cooling dehumidification return circuit, the cooling dehumidification return circuit is including connecting gradually compressor, third solenoid valve, outdoor condenser electronic expansion valve with indoor evaporimeter.
11. The dehumidifier of claim 10 wherein:
the temperature-rising dehumidification loop is provided with a first one-way valve, the first one-way valve is connected between the indoor condenser and the electronic expansion valve, and the conduction direction of the first one-way valve points to the electronic expansion valve from the indoor condenser;
and a second one-way valve is arranged on the cooling and dehumidifying loop, the second one-way valve is connected between the outdoor condenser and the electronic expansion valve, and the conduction direction is followed by the outdoor condenser pointing to the electronic expansion valve.
12. The dehumidifier of claim 11, wherein:
the temperature-raising dehumidification loop comprises a temperature-raising medium returning branch, one end of the temperature-raising medium returning branch is connected between the indoor condenser and the first one-way valve, the other end of the temperature-raising medium returning branch is connected between the indoor evaporator and the compressor, and a second electromagnetic valve is arranged on the temperature-raising medium returning branch;
the cooling dehumidification loop comprises a cooling return medium branch, one end of the cooling return medium branch is connected between the outdoor condenser and the second one-way valve, the other end of the cooling return medium branch is connected between the indoor evaporator and the compressor, and a fourth electromagnetic valve is arranged on the cooling return medium branch.
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