CN116147086A - Dehumidifier - Google Patents

Dehumidifier Download PDF

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Publication number
CN116147086A
CN116147086A CN202211347759.8A CN202211347759A CN116147086A CN 116147086 A CN116147086 A CN 116147086A CN 202211347759 A CN202211347759 A CN 202211347759A CN 116147086 A CN116147086 A CN 116147086A
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CN
China
Prior art keywords
dehumidifier
compressor
refrigerant leakage
temperature
judging whether
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211347759.8A
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Chinese (zh)
Inventor
马佩佩
郭盛
谈裕辉
李伟宁
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Hisense Guangdong Air Conditioning Co Ltd
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Hisense Guangdong Air Conditioning Co Ltd
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Publication date
Application filed by Hisense Guangdong Air Conditioning Co Ltd filed Critical Hisense Guangdong Air Conditioning Co Ltd
Priority to CN202211347759.8A priority Critical patent/CN116147086A/en
Publication of CN116147086A publication Critical patent/CN116147086A/en
Priority to PCT/CN2023/114036 priority patent/WO2024093454A1/en
Pending legal-status Critical Current

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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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Fuzzy Systems (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Drying Of Gases (AREA)

Abstract

The invention discloses a dehumidifier, comprising: the evaporator and the condenser are spaced apart to define an air flow passage therebetween; the auxiliary baffle is arranged at the inlet of the air flow channel in a swinging way and is used for controlling the opening angle of the inlet of the air flow channel; the controller is configured to: determining the refrigerant leakage rate; judging whether the refrigerant leakage rate reaches a preset threshold value; when the refrigerant leakage rate reaches a preset threshold value, the auxiliary baffle closes the inlet of the air duct, and the dehumidifier enters a refrigerant leakage protection program; and when the refrigerant leakage rate does not reach the preset threshold value, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate. According to the dehumidifier disclosed by the invention, when the dehumidifier is operated in a refrigerant leakage state, the superheat degree of the evaporator can be effectively reduced, so that the exhaust temperature of the compressor can be reduced, and the operation reliability of the whole dehumidifier in the refrigerant leakage state is improved.

Description

Dehumidifier
Technical Field
The invention relates to the technical field of dehumidifiers, in particular to a dehumidifier.
Background
The structure of the dehumidifier comprises a refrigerating system, a box system, a fan system and an electric control system, wherein the refrigerating system circulates as follows: the refrigerant enters the compressor to be compressed into high-temperature and high-pressure refrigerant steam, then the refrigerant is condensed and released in the condenser to become high-temperature and high-pressure refrigerant liquid, the refrigerant liquid is formed into low-temperature and low-pressure refrigerant liquid (or two phases) after the adiabatic throttling process occurs through the throttling component, and finally the refrigerant enters the evaporator to be evaporated and absorbed to become low-temperature and low-pressure refrigerant steam and then flows back to the compressor, and the refrigerant flows back and forth in a circulating way.
Based on the refrigerating system, the air dehumidifying process of the dehumidifier is as follows: the fan pumps indoor air into the upper shell of the dehumidifier through the air inlet and passes through the evaporator, at the moment, the indoor air is cooled and dehumidified in the evaporator to become low-temperature saturated wet air, and then the low-temperature saturated wet air is heated and dehumidified through the condenser to become dry medium-temperature gas and then is discharged into the indoor environment.
In the related art, the refrigerant leakage protection mode of the household dehumidifier is generally triggered when the refrigerant leakage rate exceeds 50%, and the dehumidifier still operates normally when the refrigerant leakage rate is between 0 and 50%. However, as the amount of refrigerant decreases, the internal superheat condition of the evaporator of the dehumidifier starts to deteriorate, for example, when the refrigerant leakage rate is 0%, the degree of superheat of the evaporator is-1 to 2 ℃; when the refrigerant leakage rate is 30%, the superheat degree of the evaporator is 13-18 ℃. In addition, along with the rise of the refrigerant leakage rate, the exhaust temperature of the compressor can also be obviously increased, when the refrigerant leakage rate is 30%, the exhaust temperature of the compressor is increased by approximately 25 ℃ compared with the exhaust temperature of the compressor when the refrigerant leakage rate is 0%, and when the compressor is in a high exhaust temperature running state for a long time, the reliability of the compressor can be seriously influenced, so that the reliability of the dehumidifier is further influenced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a dehumidifier which can effectively reduce the superheat degree of an evaporator, further reduce the exhaust temperature of a compressor, and improve the reliability of the operation of the dehumidifier in a refrigerant leakage state.
According to an embodiment of the invention, a dehumidifier includes: the refrigerant circulates in a refrigerant loop formed by a compressor, a condenser, a throttling device and an evaporator in sequence in a refrigeration cycle, wherein the evaporator and the condenser are arranged at intervals to define an air flow channel between the evaporator and the condenser; an auxiliary baffle plate swingably provided at an inlet of the air flow passage for controlling an opening angle of the inlet of the air flow passage; a controller configured to: when the dehumidifier is started to run, controlling the compressor to run so as to enable the refrigerant of the compressor to flow to the condenser, detecting the outflow flow of the refrigerant flowing out of the compressor and the inflow flow of the refrigerant flowing back to the compressor, and determining the refrigerant leakage rate; judging whether the refrigerant leakage rate reaches a preset threshold value; when the refrigerant leakage rate reaches the preset threshold value, controlling the auxiliary baffle to swing so as to close the inlet of the air duct, and enabling the dehumidifier to enter a refrigerant leakage protection program; and when the refrigerant leakage rate does not reach the preset threshold value, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate.
According to the dehumidifier of the embodiment of the invention, the auxiliary baffle is arranged at the inlet of the air flow channel between the evaporator and the condenser, and the controller is configured to control the swing angle of the auxiliary baffle according to the refrigerant leakage rate. Therefore, compared with the traditional dehumidifier, when the dehumidifier runs in the refrigerant leakage state, the superheat degree of the evaporator can be effectively reduced, the exhaust temperature of the compressor can be further reduced, and the running reliability of the whole dehumidifier in the refrigerant leakage state is improved.
According to some embodiments of the invention, the dehumidifier further comprises: a first temperature sensor for detecting a discharge temperature of the compressor; after the adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate, the controller is further configured to: detecting the exhaust temperature of the compressor by adopting the first temperature sensor, and judging whether the exhaust temperature of the compressor reaches a preset temperature threshold value or not; when the exhaust temperature of the compressor reaches the preset temperature threshold, the dehumidifier starts a compressor overheat protection program; and when the exhaust temperature of the compressor does not reach the preset temperature threshold, judging whether the refrigerant leakage rate reaches the preset threshold again.
According to some embodiments of the invention, after the dehumidifier starts the compressor overheat protection program, the controller is further configured to: judging whether the exhaust temperature of the compressor reaches the preset temperature threshold value or not; when the exhaust temperature of the compressor reaches the preset temperature threshold, the dehumidifier executes abnormal operation alarm; and when the exhaust temperature of the compressor does not reach the preset temperature threshold, judging whether the refrigerant leakage rate reaches the preset threshold again.
According to some embodiments of the invention, before the determining whether the discharge temperature of the compressor reaches a preset temperature threshold, the controller is further configured to: judging whether the compressor continuously runs for a first time period or not; if yes, judging whether the exhaust temperature of the compressor reaches the preset temperature threshold value; if the judgment result is negative, continuing to judge whether the compressor continuously runs for a first duration.
According to some embodiments of the invention, the dehumidifier further comprises: the fan is used for sucking air in the indoor environment and sequentially flowing through the evaporator and the condenser; when the refrigerant leakage rate does not reach the preset threshold value, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate, specifically including: judging whether the current rotating speed of the fan is a high wind speed or not; if the current rotating speed of the fan is high wind speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan; if the current rotating speed of the fan is not the high wind speed, judging whether the current rotating speed of the fan is the medium wind speed or not; if the current rotating speed of the fan is the medium speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan; if the current rotating speed of the fan is not the medium wind speed, judging whether the current rotating speed of the fan is the low wind speed or not; and if the current rotating speed of the fan is a low wind speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan.
According to some embodiments of the invention, the dehumidifier further comprises: a second temperature sensor for detecting a coil temperature of the evaporator; a third temperature sensor for detecting an indoor ambient temperature; the controller is further configured to: detecting t using the second temperature sensor 1 Coil temperature T of the evaporator at time evap-1 Detecting t by adopting the third temperature sensor 1 Indoor environment temperature T at moment in-1 Obtaining a first temperature difference delta 1 ＝T in_1 -T evap_1 The method comprises the steps of carrying out a first treatment on the surface of the Judging whether the compressor continuously runs for a second time period or not; when the compressor is continuously operated for the second time period, the second temperature sensor is adopted to detect t 2 Coil temperature T of the evaporator at time evap-2 Detecting t by adopting the third temperature sensor 2 Indoor environment temperature T at moment in-2 Obtaining a second temperature difference delta 2 ＝T in_2 -T evap_2 The method comprises the steps of carrying out a first treatment on the surface of the Judging whether the absolute value of the first temperature difference and the second temperature difference reaches a preset temperature difference threshold value or not; if the absolute values of the first temperature difference and the second temperature difference reach the preset temperature difference threshold value, the auxiliary baffle closes the inlet of the air duct; if the absolute value of the first temperature difference and the second temperature difference does not reach the predetermined temperature difference thresholdJudging whether the refrigerant leakage rate reaches the preset threshold value or not; and when the compressor is not continuously operated for the second time period, continuously judging whether the compressor is continuously operated for the second time period.
According to some embodiments of the invention, when the refrigerant is R410A refrigerant, the predetermined temperature difference threshold is any value between 10 ℃ and 15 ℃; when the refrigerant is R32 refrigerant, the preset temperature difference threshold is any value between 5 ℃ and 10 ℃.
According to some embodiments of the invention, before the determining whether the refrigerant leakage rate reaches the predetermined threshold, the controller is further configured to: judging whether the compressor continuously runs for a third time period; if yes, judging whether the refrigerant leakage rate reaches the preset threshold value; if the judgment result is negative, continuing to judge whether the compressor continuously runs for a third duration.
According to some embodiments of the invention, the controller is further configured to: after judging whether the dehumidifier enters the refrigerant leakage protection mode or not, judging whether the dehumidifier exits the refrigerant leakage protection mode or not; if the dehumidifier exits the refrigerant leakage protection mode, judging whether the dehumidifier enters a shutdown mode; if the dehumidifier enters a shutdown mode, controlling the auxiliary baffle to close the inlet of the air flow channel; and if the dehumidifier does not enter the shutdown mode, judging whether the refrigerant leakage rate reaches the preset threshold value.
According to some embodiments of the invention, the predetermined threshold is 50%.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a dehumidifier according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a dehumidifier according to an embodiment of the present invention;
FIG. 3 is a schematic view of a dehumidifier according to an embodiment of the present invention, wherein the housing is not shown;
FIG. 4 is an enlarged view of portion A, circled in FIG. 3;
FIG. 5 is a schematic view of the auxiliary barrier, stepper motor and side barrier of the dehumidifier shown in FIG. 3;
FIG. 6 is an enlarged view of portion B of FIG. 5;
FIG. 7 is a flow chart of a controller of the dehumidifier according to an embodiment of the present invention;
FIG. 8 is a flow chart of a controller of a dehumidifier according to another embodiment of the present invention;
fig. 9 is a flowchart of a controller of a dehumidifier according to still another embodiment of the present invention.
Reference numerals:
100: a dehumidifier;
1: a compressor; 2: a condenser; 3: an evaporator; 4: an air flow passage; 5: an auxiliary baffle;
6: a controller; 61: a processing module; 62: a storage module; 7: a first temperature sensor;
8: a second temperature sensor; 9: a stepping motor; 10: side baffles; 11: a housing; 111: an air inlet;
12: a blower.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and a dehumidifier 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 9.
As shown in fig. 1 to 9, a dehumidifier 100 according to an embodiment of the present invention includes a compressor 1, a condenser 2, a throttle device, an evaporator 3, an auxiliary barrier 5, and a controller 6.
Specifically, the refrigerant circulates in a refrigerant circuit constituted by the compressor 1, the condenser 2, the throttle device, and the evaporator 3 in this order in the refrigeration cycle, wherein the evaporator 3 and the condenser 2 are disposed at a distance to define an air flow passage 4 between the evaporator 3 and the condenser 2. An auxiliary baffle 5 is swingably provided at the inlet of the air flow passage 4 for controlling the opening angle of the inlet of the air flow passage 4.
For example, in the example of fig. 1-6, the dehumidifier 100 further includes a housing 11, the evaporator 3, the condenser 2, the throttling device, and the compressor 1 are all disposed in the housing 11, the housing 11 has an air inlet 111 and an air outlet, the evaporator 3 is opposite to the air inlet 111, and the condenser 2 is located on a side of the evaporator 3 away from the air inlet 111. The evaporator 3 absorbs heat from the low-temperature low-pressure refrigerant liquid flowing out of the throttle device to form low-temperature low-pressure refrigerant gas, and dehumidifies and cools the indoor air passing through the evaporator 3. The condenser 2 is used for cooling and depressurizing the high-temperature and high-pressure refrigerant gas discharged by the compressor 1 into medium-temperature and medium-pressure refrigerant liquid.
The controller 6 is configured to:
s1, when the dehumidifier 100 is started to operate, controlling the compressor 1 to operate so that the refrigerant of the compressor 1 flows to the condenser 2, detecting the outflow flow of the refrigerant flowing out of the compressor 1 and the inflow flow of the refrigerant flowing back to the compressor 1, and determining the refrigerant leakage rate;
s2, judging whether the refrigerant leakage rate reaches a preset threshold value, wherein the preset threshold value can be 50%.
S3, when the refrigerant leakage rate reaches a preset threshold value, controlling the auxiliary baffle 5 to swing to close the inlet of the air duct, and enabling the dehumidifier 100 to enter a refrigerant leakage protection program;
and S4, when the refrigerant leakage rate does not reach the preset threshold value, adjusting the swing angle of the auxiliary baffle 5 according to the refrigerant leakage rate.
Referring to fig. 2, the controller 6 may include a storage module 62 and a processing module 61, where the storage module 62 is communicatively connected to the processing module 61, and the storage module 62 is used to store the swing angle of the auxiliary barrier 5 under different refrigerant leakage rates. The processing module 61 is configured to obtain the refrigerant leakage rate in the dehumidifier 100 in real time, and according to the obtained refrigerant leakage rate, retrieve the swing angle corresponding to the auxiliary baffle 5 from the storage module 62, and transmit the swing angle to the stepper motor 9, so that the auxiliary baffle 5 is adjusted to the corresponding swing angle to adjust the air volume flowing through the evaporator 3.
Specifically, referring to fig. 7 to 9, when the dehumidifier 100 leaks refrigerant, the refrigerant leakage rate of the dehumidifier 100 in the operation state at a certain moment can be effectively determined through the step S1, when the refrigerant leakage rate is greater than a predetermined threshold, that is, when the refrigerant leakage rate of the dehumidifier 100 is higher, the controller 6 controls the stepper motor 9 to close the inlet of the air duct, and simultaneously, the dehumidifier 100 automatically adjusts to a refrigerant leakage protection program, and when the compressor 1 reduces the operation frequency; when the refrigerant leakage rate is smaller than or equal to the predetermined threshold, although the dehumidifier 100 is in the refrigerant leakage state at this time, the amount of the leaked refrigerant is small, the dehumidifier 100 can still operate normally, the detected refrigerant leakage rate is transferred to the processing module 61, the processing module 61 can retrieve the swing angle of the auxiliary baffle 5 corresponding to the corresponding refrigerant leakage rate from the storage module 62, and transfer the retrieved swing angle to the stepper motor 9, the stepper motor 9 drives the auxiliary baffle 5 to swing the swing angle, a part of air flowing to the shell through the air inlet 111 flows to the condenser 2 through the evaporator 3, another part directly flows to the condenser 2 through the inlet of the air duct, the condenser 2 can heat the air flowing to the condenser, so as to remove moisture in the air, and through the steps S3 and S4, the air flow to the evaporator 3 can be reduced while guaranteeing the dehumidification effect of the dehumidifier 100, thereby effectively reducing the superheat degree of the evaporator 3, further reducing the exhaust temperature of the compressor 1, and improving the reliability of the operation of the dehumidifier 100 in the refrigerant leakage state.
According to the dehumidifier 100 of the embodiment of the present invention, by providing the auxiliary barrier 5 at the inlet of the air flow channel 4 defined between the evaporator 3 and the condenser 2, and the controller 6 is configured to control the swing angle of the auxiliary barrier 5 according to the refrigerant leakage rate. Therefore, compared with the traditional dehumidifier, when the dehumidifier 100 operates in the refrigerant leakage state, the superheat degree of the evaporator 3 can be effectively reduced, the exhaust temperature of the compressor 1 can be further reduced, and the operation reliability of the whole dehumidifier 100 in the refrigerant leakage state is improved.
According to some embodiments of the present invention, the dehumidifier 100 further comprises a first temperature sensor 7, the first temperature sensor 7 being for detecting the exhaust temperature of the compressor 1.
After adjusting the swing angle of the auxiliary barrier 5 according to the refrigerant leakage rate, the controller 6 is further configured to:
s5, detecting the exhaust temperature of the compressor 1 by adopting the first temperature sensor 7, and judging whether the exhaust temperature of the compressor 1 reaches a preset temperature threshold value. By this step, it can be effectively judged whether the discharge temperature of the compressor 1 is higher or lower than the preset temperature threshold value pre-stored in the controller 6 when the dehumidifier 100 is operated in the refrigerant leakage state. That is, when the dehumidifier 100 is operated in the refrigerant leakage state, there is an increase in the discharge temperature of the compressor 1.
S6, when the exhaust temperature of the compressor 1 reaches a preset temperature threshold, the dehumidifier 100 starts the overheat protection program of the compressor 1. At this time, when the dehumidifier 100 is operated in the refrigerant leakage state, the exhaust temperature of the compressor 1 increases, in other words, the superheat degree of the evaporator 3 increases, which indicates that the refrigerant leakage rate increases, and the reliability of the compressor 1 is affected, so that the compressor 1 can be protected from damage by causing the compressor 1 to enter the overheat protection program.
And S7, when the exhaust temperature of the compressor 1 does not reach the preset temperature threshold, judging whether the refrigerant leakage rate reaches the preset threshold again. At this time, when the dehumidifier 100 is operated in the refrigerant leakage state, the exhaust temperature of the compressor 1 may be equal to the exhaust temperature detected last time, or may be lower than the exhaust temperature detected last time, which indicates that the refrigerant leakage rate is not increased along with the operation time of the dehumidifier 100, and it is necessary to continuously detect the refrigerant leakage rate and determine whether the refrigerant leakage rate reaches the predetermined threshold, so that the dehumidifier 100 can timely enter the refrigerant leakage protection program or the compressor 1 can timely enter the overheat protection program when the refrigerant leakage rate is greater than the predetermined threshold, so as to avoid damage to the compressor 1.
Further, after the dehumidifier 100 starts the overheat protection program of the compressor 1, the controller 6 is further configured to:
s8, judging whether the exhaust temperature of the compressor 1 reaches a preset temperature threshold value;
s9, when the exhaust temperature of the compressor 1 reaches a preset temperature threshold, the dehumidifier 100 executes abnormal operation alarm;
s10, when the exhaust temperature of the compressor 1 does not reach the preset temperature threshold, judging whether the refrigerant leakage rate reaches the preset threshold again.
After the compressor 1 enters the overheat protection program, the compressor 1 is still in an operating state, and at this time, whether the exhaust temperature of the compressor 1 changes when the compressor 1 enters the overheat protection program is operated can be effectively judged through the step S8, wherein when the exhaust temperature of the compressor 1 rises to a preset temperature threshold value, the refrigerant leakage rate of the compressor 1 is indicated to be gradually increased, and at this time, the dehumidifier 100 executes abnormal operation alarm for reminding a user to timely turn off the dehumidifier 100 and overhaul the dehumidifier 100; when the exhaust temperature of the compressor 1 does not rise to the preset temperature threshold, it indicates that the compressor 1 can still be used continuously, but the refrigerant leakage rate of the compressor 1 may increase along with the operation duration of the dehumidifier 100, so that the refrigerant leakage rate needs to be detected in real time through step 10, and the dehumidifier 100 is prevented from failing to protect measures in time when the refrigerant leakage rate exceeds the preset threshold. Therefore, through steps S8-S10, the refrigerant leakage rate can be monitored in real time while the dehumidifier 100 is guaranteed to dehumidify in the refrigerant leakage state, so that the dehumidifier 100 can start the protection program in time.
According to some embodiments of the present invention, before determining whether the discharge temperature of the compressor 1 reaches the preset temperature threshold, the controller 6 is further configured to:
s0, judging whether the compressor 1 continuously runs for a first time period;
if the judgment result is yes, judging whether the exhaust temperature of the compressor 1 reaches a preset temperature threshold value;
if the determination result is negative, it is continued to determine whether the compressor 1 is continuously operated for the first period of time.
After the compressor 1 is continuously operated for a period of time, the exhaust temperature of the compressor 1 is changed, and through the step S0, it can be effectively determined whether the exhaust temperature of the compressor 1 is increased after the compressor 1 is continuously operated for a first period of time, so that corresponding measures can be taken for the compressor 1 according to the exhaust temperature of the compressor 1.
According to some embodiments of the present invention, the dehumidifier 100 further comprises a blower 12 for sucking air of the indoor environment and passing through the evaporator 3 and the condenser 2 in sequence.
When the refrigerant leakage rate does not reach the preset threshold value, the swing angle of the auxiliary baffle 5 is adjusted according to the refrigerant leakage rate, and the method specifically comprises the following steps:
s41, judging whether the current rotating speed of the fan 12 is a high wind speed or not;
s42, if the rotating speed of the current fan 12 is high, adjusting the swing angle X1 of the auxiliary baffle 5 according to the refrigerant leakage rate and the rotating speed of the current fan 12;
s43, if the rotation speed of the current fan 12 is not the high wind speed, judging whether the rotation speed of the current fan 12 is the medium wind speed;
s44, if the rotating speed of the current fan 12 is the medium speed, adjusting the swing angle X2 of the auxiliary baffle 5 according to the refrigerant leakage rate and the rotating speed of the current fan 12;
s45, if the rotating speed of the current fan 12 is not the medium wind speed, judging whether the rotating speed of the current fan 12 is the low wind speed or not;
s46, if the rotating speed of the current fan 12 is a low wind speed, adjusting the swing angle X3 of the auxiliary baffle 5 according to the refrigerant leakage rate and the rotating speed of the current fan 12.
When the fan 12 operates at different rotation speeds, the air flow sucked into the evaporator 3 through the air inlet 111 is also different, and therefore, through the steps S41-S46, the rotation speed of the fan 12 and the swing angle of the auxiliary baffle 5 can be linked, so that the fan 12 can ensure the air flow flowing to the air flow channel 4 at different rotation speeds, the control accuracy can be improved, and the operation reliability of the dehumidifier 100 in the refrigerant leakage state can be further improved.
According to some embodiments of the present invention, the dehumidifier 100 further comprises a second temperature sensor 8 for detecting a coil temperature of the evaporator 3 and a third temperature sensor for detecting an indoor ambient temperature. The second temperature sensor 8 may be disposed on the temperature sensing seat of the evaporator 3, so as to ensure that the second temperature sensor 8 can accurately detect the coil temperature of the evaporator 3, the third temperature sensor may be disposed on the windward side of the evaporator 3, and the air flow flowing to the evaporator 3 through the air inlet 111 may flow through the third temperature sensor at the first time, thereby accurately detecting the indoor environment temperature.
The controller 6 is further configured to:
SO' detection of t using a second temperature sensor 8 1 Coil temperature T of evaporator 3 at time evap-1 Detecting t by using a third temperature sensor 1 Indoor environment temperature T at moment in-1 Obtaining a first temperature difference delta 1 ＝T in_1 -T evap_1 ；
S1', judging whether the compressor 1 continuously runs for a second period of time;
s2', when the compressor 1 is continuously operated for a second period of time, then the second temperature sensor 8 is used to detect t 2 Coil temperature T of evaporator 3 at time evap-2 Detecting t by using a third temperature sensor 2 Indoor environment temperature T at moment in-2 Obtaining a second temperature difference delta 2 ＝T in_2 -T evap_2 。
When the dehumidifier 100 operates in a refrigerant leakage state, the refrigerant leakage rates are different, the superheat degree of the evaporator 3 is also different, and the higher the refrigerant leakage rate is, the higher the superheat degree of the evaporator 3 is, through the steps SO '-S2', the temperature difference (namely the first temperature difference and the second temperature difference) between the coil temperature of the evaporator 3 and the indoor environment temperature in two different times can be effectively detected, SO that the superheat degree of the evaporator 3 can be indirectly obtained, and effective protection measures can be carried out according to the superheat degree of the evaporator 3.
S3', judging whether the absolute value of the first temperature difference and the second temperature difference reaches a preset temperature difference threshold value or not;
s4', if the absolute value of the first temperature difference and the second temperature difference reaches a preset temperature difference threshold value, the auxiliary baffle 5 closes the inlet of the air duct. This can indirectly indicate that the degree of superheat of the evaporator 3 is high, that is, that the refrigerant leakage rate is high. At this time, the temperature of the condenser 2 is low, all the air flowing to the condenser 2 cannot be heated into dry air, and the inlet of the air duct is closed, so that the air flow flowing to the condenser 2 can be reduced, the air flowing to the condenser 2 is ensured to be heated into dry air as much as possible, and the dehumidification effect of the dehumidifier 100 is ensured.
S1, if the absolute value of the first temperature difference and the second temperature difference does not reach a preset temperature difference threshold value, judging whether the refrigerant leakage rate reaches the preset threshold value. That is, although the degree of superheat of the evaporator 3 is higher than that in the case where no refrigerant leaks, the refrigerant leakage rate is low at this time, and the dehumidifier 100 can normally operate without affecting the operation reliability of the compressor 1 and the dehumidifier 100.
When the compressor 1 is not continuously operated for the second period of time, then it is continued to determine whether the compressor 1 is continuously operated for the second period of time. That is, after the compressor 1 is continuously operated for a second period of time, the coil temperature of the evaporator 3 and the indoor environment temperature are detected to obtain a second temperature difference, so that the accuracy of the detected data is ensured
In some alternative embodiments, when the refrigerant is an R410A refrigerant, the predetermined temperature difference threshold is any value between 10℃ and 15℃.
When the refrigerant is R32 refrigerant, the preset temperature difference threshold is any value between 5 ℃ and 10 ℃.
According to some embodiments of the invention, before determining whether the refrigerant leakage rate reaches the predetermined threshold, the controller 6 is further configured to:
s0', judging whether the compressor 1 continuously runs for a third period of time;
if yes, judging whether the refrigerant leakage rate reaches a preset threshold value;
if the determination result is negative, it is continued to determine whether the compressor 1 is continuously operated for a third period of time.
When the dehumidifier 100 is started up and operated for a period of time, the refrigerant leakage rate is detected, that is, when the dehumidifier 100 is operated stably, a series of detection is performed, and the accuracy of the detected data is ensured, so that the actual operation state of the dehumidifier 100 can be accurately judged. Optionally, the third duration is any number between 20 minutes and 40 minutes.
The controller 6 is further configured to:
after judging whether the dehumidifier 100 enters the operation of the refrigerant leakage protection mode,
s11, judging whether the dehumidifier 100 exits the refrigerant leakage protection mode;
s12, if the dehumidifier 100 exits the refrigerant leakage protection mode, judging whether the dehumidifier 100 enters a shutdown mode;
s13, if the dehumidifier 100 enters a shutdown mode, the auxiliary baffle 5 is controlled to close the inlet of the air flow channel 4;
if the dehumidifier 100 does not enter the shutdown mode, it is determined whether the refrigerant leakage rate reaches a predetermined threshold.
When the dehumidifier 100 exits the refrigerant leakage protection mode and enters the shutdown mode, the refrigerant leakage rate is higher at this time, so that normal operation of the dehumidifier 100 cannot be ensured, and closing the dehumidifier 100 can better protect the dehumidifier 100, and avoid damage to the motor of the compressor 1 caused by continuous operation. When the dehumidifier 100 exits the refrigerant leakage protection mode and does not enter the shutdown mode, it is indicated that the detected refrigerant leakage rate is higher than the predetermined threshold value, or the shutdown key may not be triggered successfully, and the refrigerant leakage rate and the predetermined threshold value need to be compared again, so that the refrigerant leakage rate in the dehumidifier 100 can be accurately determined.
According to some embodiments of the present invention, the top of the air flow channel 4 may be an inlet, in which case the auxiliary baffle 5 may be swingably provided between the top of the condenser 2 and the evaporator 3, and two side baffles may be provided between the two sides of the condenser 2 and the evaporator 3, respectively. Referring to fig. 5 and 6, one ends of the two side baffles are respectively connected to both ends of the auxiliary baffle 5 in the length direction, and the other ends of the two side baffles may be connected to the end plate of the evaporator 3 or the condenser 2 by means of a buckle or a screw to ensure the installation reliability of the two side baffles.
The length of the auxiliary baffle 5 should be greater than the distance between the two end plates of the evaporator 3 or the condenser 2, the width of the auxiliary baffle 5 should be equal to the distance between the condenser 2 and the evaporator 3, and the thickness of the auxiliary baffle 5 should meet the drop strength requirement of the product. The height of the side baffles should be higher than the heights of the condenser 2 and the evaporator 3, the width of the side baffles should be equal to the distance between the condenser 2 and the evaporator 3, and the thickness of the side baffles should meet the drop strength requirement of the product. Optionally, the gap between the side baffle and the evaporator 3 or the condenser 2 can be sealed by sponge or other materials, so that air leakage is avoided to influence the accuracy of air quantity control.
Of course, the present invention is not limited thereto, and in other embodiments of the present invention, the side of the air flow passage 4 is an inlet, and in this case, the auxiliary baffles 5 are two, and two auxiliary baffles 5 are swingably provided between the two sides of the condenser 2 and the evaporator 3, respectively, and the side baffles are provided between the top of the condenser 2 and the evaporator 3. When the dehumidifier 100 dehumidifies, the controller 6 can adjust the opening degree of the opening by controlling the swing angle of at least one of the two auxiliary baffles 5, and at this time, a part of indoor air flowing into the dehumidifier 100 through the air inlet 111 flows from the side of the condenser 2 to the condenser 22 so as to ensure the air quantity directly flowing to the condenser 2.
Other constructions and operations of the dehumidifier 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A dehumidifier, comprising:
the refrigerant circulates in a refrigerant loop formed by a compressor, a condenser, a throttling device and an evaporator in sequence in a refrigeration cycle, wherein the evaporator and the condenser are arranged at intervals to define an air flow channel between the evaporator and the condenser;
an auxiliary baffle plate swingably provided at an inlet of the air flow passage for controlling an opening angle of the inlet of the air flow passage;
a controller configured to:
when the dehumidifier is started to run, controlling the compressor to run so as to enable the refrigerant of the compressor to flow to the condenser, detecting the outflow flow of the refrigerant flowing out of the compressor and the inflow flow of the refrigerant flowing back to the compressor, and determining the refrigerant leakage rate;
judging whether the refrigerant leakage rate reaches a preset threshold value;
when the refrigerant leakage rate reaches the preset threshold value, controlling the auxiliary baffle to swing so as to close the inlet of the air duct, and enabling the dehumidifier to enter a refrigerant leakage protection program;
and when the refrigerant leakage rate does not reach the preset threshold value, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate.
2. The dehumidifier of claim 1, further comprising:
a first temperature sensor for detecting a discharge temperature of the compressor;
after the adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate, the controller is further configured to:
detecting the exhaust temperature of the compressor by adopting the first temperature sensor, and judging whether the exhaust temperature of the compressor reaches a preset temperature threshold value or not;
when the exhaust temperature of the compressor reaches the preset temperature threshold, the dehumidifier starts a compressor overheat protection program;
and when the exhaust temperature of the compressor does not reach the preset temperature threshold, judging whether the refrigerant leakage rate reaches the preset threshold again.
3. The dehumidifier of claim 2, wherein after the dehumidifier initiates a compressor overheat protection procedure, the controller is further configured to:
judging whether the exhaust temperature of the compressor reaches the preset temperature threshold value or not;
when the exhaust temperature of the compressor reaches the preset temperature threshold, the dehumidifier executes abnormal operation alarm;
and when the exhaust temperature of the compressor does not reach the preset temperature threshold, judging whether the refrigerant leakage rate reaches the preset threshold again.
4. The dehumidifier of claim 2, wherein prior to the determining whether the discharge temperature of the compressor reaches a preset temperature threshold, the controller is further configured to:
judging whether the compressor continuously runs for a first time period or not;
if yes, judging whether the exhaust temperature of the compressor reaches the preset temperature threshold value;
if the judgment result is negative, continuing to judge whether the compressor continuously runs for a first duration.
5. The dehumidifier of claim 1, further comprising:
the fan is used for sucking air in the indoor environment and sequentially flowing through the evaporator and the condenser;
when the refrigerant leakage rate does not reach the preset threshold value, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate, specifically including:
judging whether the current rotating speed of the fan is a high wind speed or not;
if the current rotating speed of the fan is high wind speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan;
if the current rotating speed of the fan is not the high wind speed, judging whether the current rotating speed of the fan is the medium wind speed or not;
if the current rotating speed of the fan is the medium speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan;
if the current rotating speed of the fan is not the medium wind speed, judging whether the current rotating speed of the fan is the low wind speed or not;
and if the current rotating speed of the fan is a low wind speed, adjusting the swing angle of the auxiliary baffle according to the refrigerant leakage rate and the current rotating speed of the fan.
6. The dehumidifier of claim 1, further comprising:
a second temperature sensor for detecting a coil temperature of the evaporator;
a third temperature sensor for detecting an indoor ambient temperature;
the controller is further configured to:
detecting t using the second temperature sensor 1 Coil temperature T of the evaporator at time evap-1 Detecting t by adopting the third temperature sensor 1 Indoor environment temperature T at moment in-1 Obtaining a first temperature difference delta 1 ＝T in_1 -T evap_1 ；
Judging whether the compressor continuously runs for a second time period or not;
when the compressor is continuously operated for the second time period, the second temperature sensor is adopted to detect t 2 Coil temperature T of the evaporator at time evap-2 Detecting t by adopting the third temperature sensor 2 Indoor environment temperature T at moment in-2 Obtaining a second temperature difference delta 2 ＝T in_2 -T evap_2 ；
Judging whether the absolute value of the first temperature difference and the second temperature difference reaches a preset temperature difference threshold value or not;
if the absolute values of the first temperature difference and the second temperature difference reach the preset temperature difference threshold value, the auxiliary baffle closes the inlet of the air duct;
if the absolute value of the first temperature difference and the second temperature difference does not reach the preset temperature difference threshold value, judging whether the refrigerant leakage rate reaches the preset threshold value or not;
and when the compressor is not continuously operated for the second time period, continuously judging whether the compressor is continuously operated for the second time period.
7. The dehumidifier of claim 6, wherein when the refrigerant is R410A refrigerant, the predetermined temperature difference threshold is any value between 10 ℃ and 15 ℃;
when the refrigerant is R32 refrigerant, the preset temperature difference threshold is any value between 5 ℃ and 10 ℃.
8. The dehumidifier of claim 1, wherein prior to the determining whether the refrigerant leak rate reaches a predetermined threshold, the controller is further configured to:
judging whether the compressor continuously runs for a third time period;
if yes, judging whether the refrigerant leakage rate reaches the preset threshold value;
if the judgment result is negative, continuing to judge whether the compressor continuously runs for a third duration.
9. The dehumidifier of claim 1, wherein the controller is further configured to:
after judging whether the dehumidifier enters the operation of the refrigerant leakage protection mode,
judging whether the dehumidifier exits the refrigerant leakage protection mode;
if the dehumidifier exits the refrigerant leakage protection mode, judging whether the dehumidifier enters a shutdown mode;
if the dehumidifier enters a shutdown mode, controlling the auxiliary baffle to close the inlet of the air flow channel;
and if the dehumidifier does not enter the shutdown mode, judging whether the refrigerant leakage rate reaches the preset threshold value.
10. Dehumidifier according to any of claims 1-9, wherein the predetermined threshold is 50%.
CN202211347759.8A 2022-10-31 2022-10-31 Dehumidifier Pending CN116147086A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202211347759.8A CN116147086A (en) 2022-10-31 2022-10-31 Dehumidifier
PCT/CN2023/114036 WO2024093454A1 (en) 2022-10-31 2023-08-21 Dehumidifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211347759.8A CN116147086A (en) 2022-10-31 2022-10-31 Dehumidifier

Publications (1)

Publication Number Publication Date
CN116147086A true CN116147086A (en) 2023-05-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211347759.8A Pending CN116147086A (en) 2022-10-31 2022-10-31 Dehumidifier

Country Status (1)

Country Link
CN (1) CN116147086A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024093454A1 (en) * 2022-10-31 2024-05-10 海信（广东）空调有限公司 Dehumidifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024093454A1 (en) * 2022-10-31 2024-05-10 海信（广东）空调有限公司 Dehumidifier

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