CN114234301A - Dehumidifier and accumulated liquid prevention control method thereof - Google Patents
Dehumidifier and accumulated liquid prevention control method thereof Download PDFInfo
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- CN114234301A CN114234301A CN202111521866.3A CN202111521866A CN114234301A CN 114234301 A CN114234301 A CN 114234301A CN 202111521866 A CN202111521866 A CN 202111521866A CN 114234301 A CN114234301 A CN 114234301A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000002265 prevention Effects 0.000 title abstract description 8
- 239000007788 liquid Substances 0.000 title description 13
- 239000003507 refrigerant Substances 0.000 claims abstract description 109
- 238000001816 cooling Methods 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000007791 dehumidification Methods 0.000 claims description 37
- 206010030113 Oedema Diseases 0.000 claims description 13
- 230000010412 perfusion Effects 0.000 claims description 6
- 241000521257 Hydrops Species 0.000 claims 1
- 238000009825 accumulation Methods 0.000 abstract description 6
- 230000001276 controlling effect Effects 0.000 description 9
- 230000005012 migration Effects 0.000 description 9
- 238000013508 migration Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 6
- 238000010792 warming Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
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, 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
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 t1The time condition is satisfied.
Optionally, the outdoor temperature includes: the outdoor ambient temperature Ta,outAnd/or outdoor condenser coil temperature Tc,out。
Optionally, including obtaining indoor evaporator coil temperature Tc,inThe first set temperature is (T)c,in-a), said a being a preset value.
Optionally, the first set time t1The set range of (A) is 360-600 minutes, and the set range of (A) is 0-5 ℃.
Optionally, the second operating condition is:
wherein, P1The 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; p0The 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 setting range of B is 30-40.
Optionally, the operating parameter includes outdoor condenser coil temperature Tc,outAnd/or forced cooling and dehumidifying operation time t;
the third operating condition is when the outdoor condenser coil temperature Tc,outNot less than the second set temperature T1When the threshold value is exceeded or the forced cooling and dehumidifying operation time t is more than or equal to a second set time t2The third operating condition is satisfied at a threshold value.
Optionally, a second set temperature T1Is set to be 3-6 ℃, and the second set time t2The setting range of (1) to (3) minutes.
Optionally, when the third operating condition is met, the compressor does not stop, the warming electromagnetic valve is opened, and the third set time t passes3Closing the post cooling electromagnetic valve, maintaining the opening degree of the electronic expansion valve at C, and continuously operating for a fourth set time t4Then, the air conditioner enters a free running state; wherein, t3、C、t4Are all set values.
Optionally, the third set time t3The set value of (A) is 5 seconds, the set range of (C) is 50-120 steps, and the fourth set time t4Is 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 dehumidification 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 accumulated liquid prevention control method and a dehumidifier, wherein various working condition parameters of the operation of the dehumidifier are detected in a heating and dehumidifying operation state, when the normal operation of the dehumidifier is influenced by the fact that a large amount of refrigerants possibly accumulate in an outdoor condenser according to the working condition parameters, the dehumidifier can be automatically and forcibly switched to a cooling and dehumidifying mode to operate, the refrigerants can be condensed and release heat 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 accumulation of a large amount of refrigerants 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 solved, technical solutions adopted, and technical effects achieved by the present application clearer, the following describes technical solutions of embodiments of the present application in further detail, and it is obvious that the described embodiments are only a part of embodiments of the present application, but not all 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 otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 heating and dehumidifying working state, a refrigerant is subjected to heat absorption and 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 cooled and dehumidified by the indoor evaporator 10, then heating and warming by 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 second electromagnetic valve 8 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 a fourth electromagnetic valve 7 is arranged on the cooling medium return branch.
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 close the pipeline capable of sealing the indoor unit before installation, and the indoor unit and the outdoor unit are connected and then the first stop valve 15 and the second stop valve 16 are opened to operate the units.
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: sensible heat discharged from indoor air on the indoor evaporator 10; latent heat of condensation of moisture condensed by the indoor air on the indoor evaporator 10; 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 the first part of heat release of the indoor condenser 4, and the second and third part of heat release of the indoor condenser 4 form net heating of 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.
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, it is determined that there is a possibility that the refrigerant in the indoor pipeline migrates outside or the refrigerant migrates outside too much, resulting in excessive refrigerant accumulation in the coil of the outdoor condenser 12, it indicates that there is a high possibility that the refrigerant in the indoor pipeline is too little, resulting in the influence on the compressor power, and therefore, this step makes a determination according to the compressor power, and when the compressor power is abnormal at this time, it indicates that the high possibility is due to excessive refrigerant migrates outside, and at this time, the unit can make a corresponding adjustment according to this problem; if the power of the compressor is normal, the condition that the refrigerant migrates outside does not exist, or the refrigerant migrates outside less, and the influence on the normal operation of the unit is not enough, so that the normal operation state is only needed to be maintained at the moment;
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 t1The 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 based on 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 that of the indoor condenserThe refrigerant of the low-pressure gas state is naturally transferred and condensed to the outdoor condenser 12. 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 t1If 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 t1When 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 judgment, and can ensure that whether the unit operation is influenced by the refrigerant capacity is judged under the condition that the storage capacity of the coil pipe 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 condition that the indoor temperature is reduced due to the fact that the forced cooling and dehumidifying is triggered is avoided as far as possible.
As a preferred embodiment of this embodiment, the outdoor temperature includes: the outdoor ambient temperature Ta,outAnd/or outdoor condenser coil temperature Tc,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 Ta,outTherefore, the outdoor temperature in this embodiment may be selected as the outdoor ambient temperature Ta,outOr directly the outdoor condenser coil temperature Tc,outWhen 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 neededa,outAnd Tc,outEither temperature value is lower than the first set temperature, then the temperature value is satisfiedThe temperature conditions described above.
Wherein, can directly set up first temperature sensor control ambient temperature in outdoor unit in order to acquire outdoor ambient temperature Ta,outA 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 condenserc,out。
As a preferred embodiment of the present embodiment, the method includes obtaining the indoor evaporator coil temperature Tc,inThe first set temperature is (T)c,in-a), said a being a preset value.
In particular, the indoor evaporator coil temperature Tc,inReflects 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 coilc,outThe temperature difference between the refrigerant and the indoor low-pressure gaseous refrigerant is when the temperature T of the coil pipe of the condenserc,outWhen 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, the indoor evaporator coil temperature T is adopted in the embodimentc,inRepresenting the temperature of the low-pressure gaseous refrigerant in the room as the coil temperature T of the evaporator in the roomc,inAs 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 Tc,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 t1The set range of (A) is 360-600 minutes, and the set range of (A) is 0-5 ℃.
Specifically, the first set time t1And the refrigerant migration speed determines the refrigerant accumulation of the coil pipe in the outdoor condenser 12, so that the first set time t1The 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 is1The setting range of (A) is preferably 360-600 minutes.
The temperature difference between the 12 coil pipe of the outdoor condenser and the low-pressure gaseous refrigerant is determined by the setting of A under the condition of starting forced cooling and dehumidifying, the larger the A is, the larger the starting temperature difference is, the serious experiments are carried out by an inventor for many times, and the setting range of A is more suitable for 0-5 ℃.
As for the second operating condition of step S3, it is preferable that:
wherein, P1The 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; p0The 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, P1The method is characterized in that for 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, the power parameter indicates that the indoor unit of the dehumidifier operates independently under the same set temperature and ambient temperature condition, the indoor unit of the dehumidifier is not influenced by the outdoor unit at all, the refrigerant in the refrigerant pipe of the indoor unit is the nameplate perfusion amount, and the power of the operation of the compressor 1 is P1，P1Can establish the functional relation P through experiments1＝f(Ta,in,Fspeed). 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 P1。
P0When 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 P0。
P is the actual detected compressor power, formula
In the middle, the power of the compressor actually driving the refrigerant in the indoor unit pipeline is occupiedThe ratio of the power of the compressor to the driving nameplate perfusion quantity refrigerant running theoretically reflects the ratio of the refrigerant stored in the outdoor unit, and the influence degree of the compressor running on the migration of the refrigerant, so that the running 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.
Through multiple experiments of the inventor, the setting range of B is preferably 30-40.
Step S4 is to determine that the refrigerant stored in the outdoor condenser 12 is drained in time, to ensure that the temperature-raising and dehumidifying operation can be switched back in time to meet the indoor heating requirement, and to determine the working parameters of the outdoor condenser, so that the proper selection of the working parameters determines the timeliness of the temperature-raising and dehumidifying switching.
Preferably, the operating parameter includes outdoor condenser coil temperature Tc,outAnd/or a forced cooling and dehumidifying operation time T, wherein the third operation condition is that when the temperature T of the outdoor condenser coil is higher than the temperature T of the outdoor condenser coilc,outNot less than the second set temperature T1When the threshold value is exceeded or the forced cooling and dehumidifying operation time t is more than or equal to a second set time t2The third operating condition is satisfied at a threshold value, wherein T1And t2Are 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 calculatedc,outFor the criterion, when the outdoor condenser coil temperature Tc,outThe temperature rises to a second set temperature T1When the refrigerant is guided, the refrigerant in the pipeline is guided; wherein, the outdoor condenser coil temperature Tc,outThe 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 t2Even if the outdoor temperature is too low, the condenser 12 is not heated to the second set temperature T1At this time, the forced cooling and dehumidification can be directly quitted. Wherein the second set time t2The power consumption of the unit and the pipeline path length are mainly used for determining.
Through multiple times of experiments and verification of the inventor, the second set temperature T1Is set to be 3-6 ℃, and the second set time t2The setting range of (1) to (3) minutes.
Further, when the third operation condition is met, the compressor does not stop, the temperature-increasing electromagnetic valve is opened, and the third set time t is passed3Closing the post cooling electromagnetic valve, maintaining the opening degree of the electronic expansion valve at C, and continuously operating for a fourth set time t4Then, the air conditioner enters a free running state; wherein, t3、C、t4Are all set values.
That is, after the forced cooling dehumidification is exited, the unit does not immediately enter the automatically controlled heating and cooling operation, but the heating electromagnetic valve is opened and the cooling electromagnetic valve is kept opened for the third set time t3Then the outdoor condenser 12 is closed, at this time, the pipeline of the outdoor condenser 12 is kept open, the compressor 1 can continue to suck the refrigerant in the outdoor condenser 12 during the operation process, so that the refrigerant in the outdoor condenser 12 can rapidly flow back to the indoor loop, and in the process, the opening degree of the electronic expansion valve is kept to be C so as 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 t3The set value of (A) is 5 seconds, the set range of (C) is 50-120 steps, and the fourth set time t4Is 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 accumulated liquid of a dehumidifier, in which various operating condition parameters of the dehumidifier are detected in a temperature-increasing and dehumidifying operating state, when it is automatically determined that a large amount of refrigerant may be accumulated in an outdoor condenser to affect a normal operation of the dehumidifier according to the operating condition parameters, the dehumidifier can be automatically and forcibly switched to a temperature-decreasing and dehumidifying mode to operate, at this time, the refrigerant can condense and release heat in the outdoor condenser, thereby achieving a heating effect on the outdoor condenser, and the refrigerant accumulated in the outdoor condenser can be transported out, thereby preventing the large amount of refrigerant from being accumulated in a coil of the outdoor condenser to affect the normal operation of the dehumidifier.
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 in connection with 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 (15)
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;
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.
2. The anti-hydrops control method of the dehumidifier according to claim 1, 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 zero;
the timer times more than or equal to a first set time t1The time condition is satisfied.
3. The dehumidifier hydrops-preventing control method according to claim 2, wherein:
the outdoor temperature includes: the outdoor ambient temperature Ta,outAnd/or outdoor condenser coil temperature Tc,out。
4. The dehumidifier hydrops-preventing control method according to claim 3, wherein: including obtaining indoor evaporator coil temperature Tc,inThe first set temperature is (T)c,in-A)，And A is a preset value.
5. The anti-hydrops control method of the dehumidifier according to claim 4, wherein:
the first set time t1The set range of (A) is 360-600 minutes, and the set range of (A) is 0-5 ℃.
6. The anti-hydrops control method of the dehumidifier according to claim 1, wherein:
the second operating condition is:
wherein, P1The 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; p0The idle power parameter of the compressor is the idle power parameter when no refrigerant exists in the dehumidifier; b is a set value.
7. The dehumidifier hydrops-preventing control method according to claim 6, wherein: the set range of B is 30-40.
8. The anti-hydrops control method of the dehumidifier according to claim 1, wherein: the operating parameters include outdoor condenser coil temperature Tc,outAnd/or forced cooling and dehumidifying operation time t;
the third operating condition is when the outdoor condenser coil temperature Tc,outNot less than the second set temperature T1When the threshold value is exceeded or the forced cooling and dehumidifying operation time t is more than or equal to a second set time t2The third operating condition is satisfied at a threshold value.
9. The dehumidifier hydrops-preventing control method according to claim 8, wherein:
second set temperature T1Is set to be 3-6 ℃, and the second set time t2Within a set range ofIs 1 to 3 minutes.
10. 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 heating electromagnetic valve is opened, and the third set time t is passed3Closing the post cooling electromagnetic valve, maintaining the opening degree of the electronic expansion valve at C, and continuously operating for a fourth set time t4Then, the air conditioner enters a free running state; wherein, t3、C、t4Are all set values.
11. The dehumidifier hydrops-preventing control method according to claim 10, wherein:
the third set time t3The set value of (A) is 5 seconds, the set range of (C) is 50-120 steps, and the fourth set time t4Is 1 to 3 minutes.
12. A dehumidifier is characterized in that:
a method for operating a dehumidifier anti-hydrops control as claimed in any one of claims 1 to 11.
13. The dehumidifier of claim 12, comprising:
the temperature-raising dehumidification 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.
14. The dehumidifier of claim 13, 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 from the direction of the outdoor condenser to the electronic expansion valve.
15. The dehumidifier of claim 14, 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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| CN111189131A (en) * | 2020-02-25 | 2020-05-22 | 合肥天鹅制冷科技有限公司 | Low-ring-temperature air temperature and humidity adjusting device |
| CN212227445U (en) * | 2020-03-26 | 2020-12-25 | 浙江思科制冷股份有限公司 | Energy-saving constant temperature and humidity refrigerating system |
| CN111706972A (en) * | 2020-06-04 | 2020-09-25 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner dehumidification, and air conditioner |
| CN213119348U (en) * | 2020-08-26 | 2021-05-04 | 四川桑瑞思环境技术工程有限公司 | Constant temperature and humidity governing system |
| CN112197461A (en) * | 2020-10-13 | 2021-01-08 | 王春喜 | Multifunctional dehumidification heat pump for swimming pool |
| CN213713339U (en) * | 2020-11-18 | 2021-07-16 | 河南城建学院 | A dehumidification and refrigeration integrated air conditioning system |
| CN113432264A (en) * | 2021-06-29 | 2021-09-24 | 海信（山东）空调有限公司 | Refrigerant circulation system, method for controlling air conditioner to dehumidify and air conditioner |
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