CN115679665A - Clothes care equipment and overload prevention control method for same - Google Patents

Abstract

The present invention relates to a laundry care apparatus and an overload prevention control method therefor. The garment care device has a refrigeration system, and the refrigeration system comprises: the refrigeration system comprises a compressor, a condenser, an expansion device and an evaporator, wherein the evaporator comprises a first evaporator part and a second evaporator part, the refrigeration system has a normal operation mode and an overload prevention operation mode, and when the refrigeration system is in the normal operation mode, a refrigerant in the refrigeration system flows through the condenser, the expansion device, the first evaporator part and the second evaporator part in sequence after being discharged from the compressor, and then is sucked by the compressor; and when the refrigeration system is in the overload prevention operation mode, the refrigerant is discharged from the compressor, then flows through the condenser, the first evaporator part, the expansion device and the second evaporator part in sequence, and is sucked by the compressor. The clothes care equipment can be switched to an overload-prevention operation mode under a high-temperature working condition so as to improve the supercooling degree of a refrigerant, reduce the suction and exhaust pressures of a compressor and further avoid unnecessary overload protection.

Description

Clothes care equipment and overload prevention control method for same

Technical Field

The present invention relates to the field of laundry care appliances, in particular to a laundry care appliance and an overload prevention control method therefor.

Background

With the continuous progress of the technology of the clothes care equipment, the clothes care equipment is favored by more and more families. The clothes care equipment is an electric appliance integrating functions of high-temperature drying, steam ironing, ultraviolet disinfection and the like, and can conveniently provide various care such as drying, wrinkle removal, dust removal, degerming, odor removal and the like for clothes.

At present, hot air circulating systems are mostly adopted in clothes care equipment to care clothes so as to achieve the effects of drying, removing odor and the like. The hot air circulating system generally includes an air duct, and a fan and a dehumidifying and heating device disposed in the air duct. Air enters the air channel from the air return port of the air channel under the action of the fan, is dehumidified and heated by the dehumidifying and heating device, and is discharged from the air outlet of the air channel back into the cabinet body of the clothes care equipment to care clothes. When the clothes are subjected to wrinkle removal and sterilization operations, the clothes care equipment needs to perform high-temperature treatment on air in the early stage of hot air circulation to perform wrinkle removal and sterilization operations, but the operation of a heat pump system (namely a refrigerating system) for performing a drying procedure in the later stage is relatively unfavorable.

The existence of high temperature operating mode in the clothing care apparatus after the procedure of removing wrinkle, disinfecting for the ambient temperature that evaporimeter, condenser and compressor were located in the heat pump system who carries out the stoving procedure is too high, thereby seriously influences compressor work, causes the heat pump system to take place unnecessary overload protection.

Therefore, there is a need in the art for a new solution to the above problems.

Disclosure of Invention

In order to solve the above problems in the prior art, that is, to solve the technical problem in the prior art that the existence of high temperature working conditions in the clothes care equipment can cause unnecessary overload protection of the compressor, the invention provides the clothes care equipment. The garment care device has a refrigeration system, and the refrigeration system comprises: the refrigeration system comprises a compressor, a condenser, an expansion device and an evaporator, wherein the evaporator comprises a first evaporator part and a second evaporator part, the refrigeration system has a normal operation mode and an overload prevention operation mode, and when the refrigeration system is in the normal operation mode, a refrigerant in the refrigeration system flows through the condenser, the expansion device, the first evaporator part and the second evaporator part in sequence after being discharged from the compressor, and is sucked by the compressor; and when the refrigeration system is in the overload prevention operation mode, the refrigerant is discharged from the compressor, flows through the condenser, the first evaporator part, the expansion device and the second evaporator part in sequence, and is sucked by the compressor.

The evaporator of the inventive laundry care appliance comprises a first evaporator portion and a second evaporator portion. In a normal operation mode, the refrigerant discharged from the compressor flows through the condenser, the expansion device, the first evaporator portion and the second evaporator portion in sequence, and then flows back to the compressor. When the clothes care equipment is in a high-temperature working condition, the clothes care equipment can be switched to an overload prevention running mode to avoid unnecessary overload protection of the compressor. In the overload prevention operation mode, a refrigerant is discharged from the compressor, passes through the condenser, the first part of the evaporator, the expansion device and the second part of the evaporator in sequence, and is sucked by the compressor. In the overload prevention operation mode, after passing through the condenser, the refrigerant firstly flows through the first part of the evaporator before flowing through the expansion device, the refrigerant leaving the condenser is further cooled by utilizing the relatively low temperature of the evaporator, the supercooling degree of the refrigerant can be effectively improved, the condensation temperature and the evaporation temperature can be further reduced, the suction pressure and the exhaust pressure of the compressor are correspondingly reduced, and the unnecessary overload protection of the starting of the refrigerating system is further avoided.

In a preferred embodiment of the above-mentioned clothes care apparatus, the compressor has an air suction port and an air discharge port; the condenser is provided with a liquid outlet end and a gas inlet end communicated with the gas outlet; and the refrigeration system comprises: a main cooling flow path extending from the liquid outlet end to the suction port, the main cooling flow path including a first control valve, the expansion device, the first evaporator section, a second control valve, and the second evaporator section in this order along a flow direction of the refrigerant; a first bypass flow path having a first end connected to a position of the main refrigerant flow path downstream of the liquid outlet end and upstream of the first control valve, and a second end connected to a position of the main refrigerant flow path downstream of the first evaporator portion and upstream of the second control valve, and a third control valve is provided on the first bypass flow path; and a second bypass flow path having a third end connected to the main refrigeration flow path at a location downstream of the first control valve and upstream of the expansion device and a fourth end connected to the main refrigeration flow path at a location downstream of the second control valve and upstream of the second evaporator section, and a fourth control valve provided on the second bypass flow path, wherein when the refrigeration system is in the normal operation mode, the first and second control valves are open and the third and fourth control valves are closed; and when the refrigeration system is in the overload prevention operation mode, the third control valve and the fourth control valve are conducted, and the first control valve and the second control valve are closed. Through the arrangement, the clothes care equipment can realize the switching of the operation modes by controlling the opening and closing of the first control valve, the second control valve, the third control valve and the fourth control valve. The refrigeration system can be operated in a normal operation mode by opening the first control valve and the second control valve on the main refrigeration flow path and closing the third control valve on the first bypass flow path and the fourth control valve on the second bypass flow path. When the clothes care equipment is in the high temperature working condition, the refrigeration system can be switched to the overload-proof operation mode from the normal operation mode by closing the first control valve and the second control valve and switching on the third control valve and the fourth control valve. In the overload prevention operation mode, the refrigerant flowing out of the liquid outlet end of the condenser firstly flows through the first evaporator part through the first bypass flow path and then flows to the expansion device. The arrangement can effectively improve the supercooling degree of the refrigerant in the refrigeration system, thereby reducing the condensation temperature and the evaporation temperature, reducing the suction pressure and the exhaust pressure of the compressor and further avoiding the unnecessary overload protection of the start of the refrigeration system.

In a preferred embodiment of the above laundry care appliance, the first control valve, the second control valve, the third control valve and the fourth control valve are all solenoid valves. The electromagnetic valve has the advantages of simple structure, low price, sensitive control, reliable action and the like. The electromagnetic valve is convenient for the refrigeration system to realize the switching of the operation modes.

In a preferred embodiment of the above laundry care appliance, the expansion device is a capillary tube or an expansion valve. The capillary has the advantages of simple structure, stable work, low price and the like; the expansion valve has stable superheat degree, and is favorable for ensuring the stable operation of the refrigeration system.

In order to solve the above-mentioned problems in the prior art, i.e. to solve the technical problem of the prior art that the existence of high temperature working conditions in the clothes care device can cause unnecessary overload protection of the compressor, the present invention provides an overload prevention control method, which is used for any one of the clothes care devices and comprises:

controlling the refrigeration system to operate in a normal operation mode;

detecting the air duct humidity of the clothes care equipment;

judging whether the air duct humidity is greater than or equal to an air duct humidity threshold value or not;

when the air duct humidity is greater than or equal to the air duct humidity threshold value, judging whether the refrigerating system is in a later operation stage;

when the refrigerating system is in a later operation stage, detecting the air duct temperature of the clothes care equipment;

judging whether the air duct temperature is greater than an air duct temperature threshold value;

and when the air duct temperature is greater than the air duct temperature threshold value, controlling the refrigerating system to be switched to an overload prevention operation mode.

Through the arrangement, the clothes care equipment firstly judges whether the air duct humidity of the clothes care equipment is lower than the air duct humidity threshold value by adopting the overload prevention control method so as to determine whether the clothes in the clothes care equipment are dried. When the laundry is not dried (i.e. the duct humidity is not lower than the duct humidity threshold), the laundry care device needs to continue to perform the drying operation. When the refrigerating system is in the later operation stage (namely the last 1/5 period of the whole operation period of the drying program), whether the clothes care equipment is in the high-temperature working condition is determined by judging whether the air duct temperature is greater than the air duct temperature threshold value. When the clothes care equipment is in a high-temperature working condition, the overload prevention control method can control the refrigeration system to be switched to the overload prevention operation mode so as to avoid starting unnecessary overload protection.

In a preferred embodiment of the above overload prevention control method, the overload prevention control method further includes:

controlling the refrigeration system to operate in the overload prevention operation mode for a preset duration;

and after the preset duration is continued, whether the air duct temperature is greater than the air duct temperature threshold value is judged again.

Through the arrangement, the overload prevention control method can control the operation of the refrigerating system in the overload prevention operation mode so as to reduce the supercooling degree of a refrigerant in the refrigerating system, thereby reducing the condensation temperature and the evaporation temperature, reducing the suction pressure and the exhaust pressure of the compressor and further avoiding the starting of unnecessary overload protection of the refrigerating system.

In a preferred embodiment of the above overload prevention control method, the overload prevention control method further includes:

when the refrigerating system is in the early stage of operation or the middle stage of operation, detecting the air duct temperature, the condensing temperature, the evaporating temperature, the exhaust temperature and the suction temperature of the refrigerating system;

determining an exhaust superheat based on the condensing temperature and the exhaust temperature, and determining an intake superheat based on the evaporating temperature and the intake temperature;

judging whether the air duct temperature is greater than the air duct temperature threshold value, whether the air suction superheat degree is greater than the air suction superheat degree threshold value and whether the exhaust superheat degree is greater than the exhaust superheat degree threshold value;

when the duct temperature is greater than the duct temperature threshold, the suction superheat is greater than the suction superheat threshold, and the discharge superheat is greater than the discharge superheat threshold, controlling the refrigeration system to switch to the overload prevention operation mode;

controlling the refrigeration system to operate in the overload prevention operation mode for a preset time period,

wherein the exhaust superheat degree is the difference between the exhaust temperature and the condensation temperature, and the suction superheat degree is the difference between the suction temperature and the evaporation temperature.

With the arrangement, when the refrigerating system is in the early operation stage (namely the first 1/5 period of the whole operation period of the drying program) or the middle operation stage (namely 1/5 to 4/5 period of the whole operation period of the drying program), whether the clothes care equipment is in a high-temperature working condition or not and the compressor is operated in a working condition with a higher load can be determined by judging whether the air duct temperature is greater than the air duct temperature threshold value, whether the suction superheat degree is greater than the suction superheat degree threshold value and whether the exhaust superheat degree is greater than the exhaust superheat degree threshold value. When the compressor operates under the working condition of high load, the overload prevention control method can control the refrigeration system to be switched to the overload prevention operation mode, and enables the refrigeration system to reduce the supercooling degree of a refrigerant in the overload prevention operation mode, so that the condensation temperature and the evaporation temperature are reduced, the suction pressure and the exhaust pressure of the compressor are reduced, and unnecessary overload protection of the refrigeration system is prevented from being started. The arrangement enables the refrigerating system to judge the time for switching the operation mode so as to effectively prevent the refrigerating system from generating unnecessary overload protection.

In a preferred embodiment of the above overload prevention control method, the overload prevention control method further includes: and when the air duct temperature is less than or equal to the air duct temperature threshold value, controlling the refrigeration system to operate in the normal operation mode. Through foretell setting, be favorable to guaranteeing the normal clear of clothing care apparatus stoving.

In a preferred embodiment of the above overload prevention control method, the overload prevention control method further includes: and when the air duct temperature is less than or equal to the air duct temperature threshold, or when the suction superheat degree is less than or equal to the suction superheat degree threshold, or when the exhaust superheat degree is less than or equal to the exhaust superheat degree threshold, controlling the refrigerating system to operate in the normal mode. Through the arrangement, when the working condition of the compressor is good, the refrigeration system maintains a normal mode; or when the refrigeration system solves the problem of higher compressor load under the high-temperature working condition in the overload prevention operation mode, and after the compressor load is relieved, the overload prevention operation mode is switched to the normal operation mode. The arrangement is favorable for ensuring the normal drying of the clothes nursing equipment.

In a preferred embodiment of the overload prevention control method, the refrigeration system includes a main refrigeration flow path, a first bypass flow path and a second bypass flow path, and when the refrigeration system is operated in the normal operation mode, the first control valve and the second control valve of the main refrigeration flow path are controlled to be on, and the third control valve of the first bypass flow path and the fourth control valve of the second bypass flow path are closed; and when the refrigeration system operates in the overload prevention operation mode, controlling the third control valve and the fourth control valve to be communicated, and closing the first control valve and the second control valve. Through the arrangement, the clothes care equipment can efficiently realize the switching of the operation modes by controlling the opening and closing of the first control valve, the second control valve, the third control valve and the fourth control valve.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of an embodiment of a refrigeration system of the garment care device of the present invention;

FIG. 2 is a schematic flow diagram of the overload prevention control method of the present invention;

FIG. 3 is a first flow chart of an embodiment of the overload control method of the present invention;

fig. 4 is a second flowchart of an embodiment of the overload prevention control method of the present invention.

List of reference numerals:

1. a refrigeration system; 11. a compressor; 111. an air suction port; 112. an exhaust port; 12. a condenser; 121. a liquid outlet end; 122. an air inlet end; 13. an expansion device; 14. an evaporator; 141. a first evaporator section; 142. a second evaporator section; 15. a main cooling flow path; 151. a first control valve; 152. a second control valve; 16. a first bypass flow path; 161. a third control valve; 162. a first end; 163. a second end; 17. a second bypass flow path; 171. a fourth control valve; 172. a third end; 173. and a fourth end.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that the terms "first" and "second" in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention provides a clothes care device, aiming at solving the technical problem that the existence of high-temperature working conditions in the clothes care device in the prior art can cause unnecessary overload protection of a compressor. The laundry care appliance has a refrigeration system 1, and the refrigeration system 1 comprises: the refrigeration system comprises a compressor 11, a condenser 12, an expansion device 13 and an evaporator 14, wherein the evaporator 14 comprises a first evaporator part 141 and a second evaporator part 142, the refrigeration system 1 has a normal operation mode and an overload prevention operation mode, and when the refrigeration system 1 is in the normal operation mode, refrigerant in the refrigeration system 1 flows through the condenser 12, the expansion device 13, the first evaporator part 141 and the second evaporator part 142 in sequence after being discharged from the compressor 11 and then is sucked by the compressor 11; and when the refrigeration system 1 is in the overload prevention operation mode, the refrigerant is discharged from the compressor 11, sequentially passes through the condenser 12, the first evaporator portion 141, the expansion device 13, and the second evaporator portion 142, and is then sucked into the compressor 11.

Fig. 1 is a schematic view of an embodiment of a refrigeration system of a garment care device of the present invention. In one or more embodiments, as shown in fig. 1, the garment care device of the present invention has a refrigeration system 1. The refrigeration system 1 includes, but is not limited to, a compressor 11, a condenser 12, an expansion device 13, and an evaporator 14. Wherein the evaporator 14 includes a first evaporator section 141 and a second evaporator section 142. In one or more embodiments, the first evaporator section 141 and the second evaporator section 142 are integrated together to form the evaporator 14. Alternatively, the first and second evaporator portions 141 and 142 are disposed close to each other.

As shown in fig. 1, the compressor 11 has a suction port 111 and a discharge port 112. The suction port 111 is connected to the second evaporator section 142 of the evaporator 14 so that the low-temperature and low-pressure gaseous refrigerant from the evaporator 14 is sucked into the compressor 11. The discharge port 112 is connected to an intake end 122 of the condenser 12 to discharge the high-temperature and high-pressure gaseous refrigerant from the compressor 11 into the condenser 12.

As shown in fig. 1, the refrigeration system 1 has an expansion device 13 to control the flow rate of the refrigerant and to achieve throttling and pressure reduction. In one or more embodiments, the expansion device 13 is an electronic expansion valve. The electronic expansion valve has the advantages of large adjustment range, rapid and sensitive action, precise adjustment, stability, reliability and the like. In alternative embodiments, expansion device 13 may also be a thermostatic expansion valve or any other suitable expansion valve. Alternatively, the expansion device 13 can also be a capillary tube. In the case of using the capillary tube as the expansion device 13, a filter should be disposed on each of the upstream and downstream sides of the expansion device 13, so as to ensure that the refrigerant can flow into the capillary tube after passing through the filter in the normal operation mode and in the overload prevention operation mode of the refrigeration system of the present invention, thereby effectively preventing the capillary tube from being blocked.

With continued reference to fig. 1, in one or more embodiments, the refrigeration system 1 includes a main refrigeration flowpath 15, a first bypass flowpath 16, and a second bypass flowpath 17. The main cooling flow path 15 extends from a liquid outlet end 121 of the condenser 12 to a suction port 111 of the compressor 11. The main cooling flow path 15 includes a first control valve 151, an expansion device 13, a first evaporator section 141, a second control valve 152, and a second evaporator section 142 in this order along the flow direction of the refrigerant. In one or more embodiments, the first control valve 151 and the second control valve 152 are solenoid valves, which may be, for example, hydraulic solenoid valves. The electromagnetic valve has the advantages of sensitive control and reliable action, and can efficiently control the on-off of the main refrigeration flow path 15. In alternate embodiments, the first control valve 151 and the second control valve 152 may also be mechanical valves or any other suitable valves.

As shown in fig. 1, the first bypass flow path 16 has a first end 162 and a second end 163. First end 162 is connected to main refrigerant flow path 15. Specifically, the first end 162 is located at a position downstream of the liquid outlet end 121 of the condenser 12 and upstream of the first control valve 151. The second end 163 is also connected to the main refrigeration flow path. The second end 163 is located at a position downstream of the first evaporator section 141 and upstream of the second control valve 152. Note that the upstream and downstream are referred to herein based on the flow direction of the refrigerant in the main cooling passage 15. A third control valve 161 is also provided in the first bypass line 16 to control the opening and closing of the first bypass line 16. In one or more embodiments, the third control valve 161 is a solenoid valve, which may be, for example, a hydraulic solenoid valve. The solenoid valve has the advantages of sensitive control and reliable action, and can efficiently control the on-off of the first bypass flow path 16. In alternative embodiments, the third control valve 161 may be a mechanical valve or any other suitable valve.

As shown in fig. 1, the second bypass flow path 17 has a third end 172 and a fourth end 173. Third end 172 is connected to main refrigerant flow path 15. Specifically, the third end 172 is located at a position downstream of the first control valve 151 and upstream of the expansion device 13. The fourth end 173 is connected to the main refrigerant flow path 15. The fourth end 173 is located at a position downstream of the second control valve 152 and upstream of the second evaporator section 142. A fourth control valve 171 is further provided in the second bypass passage 17 to control opening and closing of the second bypass passage 17. In one or more embodiments, the fourth control valve 171 is a solenoid valve, which may be, for example, a hydraulic solenoid valve. The solenoid valve has the advantages of sensitive control and reliable action, and can efficiently control the on-off of the second bypass flow path 17. In alternative embodiments, the fourth control valve 171 may also be a mechanical valve or any other suitable valve.

With continued reference to fig. 1, in one or more embodiments, the refrigeration system 1 of the garment care device of the present invention has a normal mode of operation and an overload prevention mode of operation. When the refrigeration system 1 is in the normal operation mode, the first control valve 151 and the second control valve 152 are in the on state, and the third control valve 161 on the first bypass flow path 16 and the fourth control valve 171 on the second bypass flow path 17 are in the off state. Therefore, in the normal operation mode, the gaseous refrigerant compressed to high temperature and high pressure by the compressor 11 is discharged from the discharge port 112 of the compressor 11, enters the condenser 12 through the inlet end 122, and is converted into a liquid refrigerant at medium temperature and high pressure by heat dissipation in the condenser 12. The medium-temperature high-pressure liquid refrigerant flows from the liquid outlet end 121 of the condenser 12 along the main refrigeration flow path 15 and enters the expansion device 13. The medium-temperature and high-pressure liquid refrigerant is throttled by the expansion device 13 and then converted into a low-temperature and low-pressure liquid refrigerant, and then flows through the first evaporator portion 141 and the second evaporator portion 142 in sequence. The low-temperature and low-pressure liquid refrigerant absorbs heat in the evaporator 14 and is converted into a low-temperature and low-pressure gaseous refrigerant, and the refrigerant returns to the compressor 11 through the suction port 111 to start a new compression cycle.

With continued reference to fig. 1, when the refrigeration system 1 is in the overload prevention operation mode, the third control valve 161 and the fourth control valve 171 are in a conducting state, and the first control valve 151 and the second control valve 152 are in a closed state. Therefore, in the overload prevention operation mode, the gaseous refrigerant compressed to high temperature and high pressure by the compressor 11 is discharged from the discharge port 112 of the compressor 11, and then sequentially passes through the condenser 12 and the first evaporator portion 141, the gaseous refrigerant at high temperature and high pressure in the condenser 12 is converted into a liquid refrigerant at medium temperature and high pressure by heat release, and the liquid refrigerant at medium temperature and high pressure is further cooled while flowing through the first evaporator portion 141, thereby increasing the supercooling degree. The refrigerant leaving the first evaporator portion 141 enters the expansion device 13, is throttled therein to become a low-temperature low-pressure liquid refrigerant, and then flows through the second evaporator portion 142 to be converted into a low-temperature low-pressure gaseous refrigerant, and returns to the compressor 11.

In order to solve the technical problem that the existence of high-temperature working conditions in the clothes care equipment in the prior art can cause unnecessary overload protection of the compressor, the invention also provides an overload prevention control method for the clothes care equipment. The overload prevention control method comprises the following steps:

controlling the refrigeration system to operate in a normal operation mode (step S1);

detecting the air duct humidity of the clothes care equipment (step S2);

judging whether the air duct humidity is greater than or equal to an air duct humidity threshold value or not (step S3);

when the air duct humidity is greater than or equal to the air duct humidity threshold value, judging whether the refrigerating system is in the later operation stage (step S4);

when the refrigerating system is in the later operation stage, detecting the air duct temperature of the clothes care equipment (step S5);

judging whether the air duct temperature is greater than an air duct temperature threshold value or not (step S6);

and when the air duct temperature is greater than the air duct temperature threshold value, controlling the refrigerating system to be switched to an overload prevention operation mode (step S7).

Fig. 2 is a flow chart of the overload prevention control method of the invention. As shown in FIG. 2, in one or more embodiments, steam heating is required while the garment care device of the present invention is performing a wrinkle removal or sterilization procedure. After the wrinkle removing or sterilizing process is completed, the laundry care device starts a drying process to dry the laundry. The overload prevention control method starts while the drying process is started. First, step S1 is performed, i.e., the refrigeration system 1 is controlled to operate in the normal mode. In the normal mode, the first control valve 151 and the second control valve 152 in the refrigeration system 1 are maintained in the on state, and the third control valve 161 and the fourth control valve 171 are maintained in the off state. Subsequently or simultaneously, step S2 is executed, namely, the duct humidity of the clothes care device is detected. In one or more embodiments, a humidity detector is disposed in the air duct of the clothes care apparatus to obtain the humidity of the air duct in real time. It is understood that the air duct is a chamber formed between the outer shell and the inner container of the clothes care device and used for circulating the air flow. Next, step S3 is executed, that is, it is determined whether the duct humidity is greater than or equal to the duct humidity threshold. In one or more embodiments, the duct humidity threshold is 30% relative humidity. In an alternative embodiment, the air duct humidity threshold may also be any suitable value from 0 to 30%, and may be determined according to actual design requirements. When the judgment result in the step S3 is yes, it indicates that the humidity of the air duct is high and the clothes are not dried yet. At this time, step S4 is executed, that is, when the duct humidity is greater than or equal to the duct humidity threshold, it is determined whether the refrigeration system is in the later operation stage. It should be noted that the whole operation cycle of the drying program can be divided into three stages, namely, an early stage operation, a middle stage operation and a late stage operation. The early operation period is the first 1/5 period of the whole operation period; the middle operation period is the 1/5 th to 4/5 th period of the whole operation period; the later operation period is the last 1/5 period of the whole operation period. The clothes care equipment can judge the current stage according to the running time length. Next, step S5 is executed, namely, when the refrigeration system is in the later operation stage, the temperature of the air duct of the clothes care device is detected. In one or more embodiments, a temperature sensor is provided in the garment care device for detecting the tunnel temperature T0. In alternate embodiments, the laundry care appliance may also acquire the tunnel temperature T0 in any suitable manner. Next, step S6 is executed, i.e. it is determined whether the wind tunnel temperature is greater than the wind tunnel temperature threshold. In one or more embodiments, the threshold duct temperature T0' is 60 ℃ during a later period of operation of the refrigeration system 1. In alternative embodiments, the duct temperature threshold T0' may be other suitable values determined based on the settings of the refrigeration system 1. When the judgment result in the step S6 is yes, it indicates that the refrigeration system 1 is in a working condition with a high ambient temperature. At this time, step S7 is executed, that is, when the duct temperature is greater than the duct temperature threshold, the refrigeration system is controlled to switch to the overload prevention operation mode. Specifically, the first control valve 151 and the second control valve 152 are controlled to be closed, and the third control valve 161 and the fourth control valve 171 are controlled to be opened. After step S7 is executed, the overload prevention control method ends.

FIG. 3 is a first flow chart of an embodiment of the overload control method of the present invention; fig. 4 is a second flow chart of an embodiment of the overload prevention control method of the present invention. In one or more embodiments, steam heating may be required while the garment care device of the present invention is performing a de-wrinkling or sterilization procedure, as shown in fig. 3 and 4. After finishing the wrinkle removing or sterilizing process, the laundry care device starts a drying process to dry the laundry. The overload prevention control method starts while the drying process is started. First, step S1 is performed, i.e., the refrigeration system 1 is controlled to operate in the normal mode. Subsequently or simultaneously, step S2 is executed, namely, the duct humidity of the clothes care device is detected. In one or more embodiments, a humidity detector is disposed in the air duct of the clothes care apparatus to obtain the humidity of the air duct in real time. Then, step S3 is executed to determine whether the duct humidity is greater than or equal to the duct humidity threshold. In one or more embodiments, the duct humidity threshold is 30% relative humidity. In an alternative embodiment, the air duct humidity threshold may also be any suitable value from 0 to 30%, and may be determined according to actual design requirements. When the judgment result of the step S3 is no, step S82 is performed, i.e., it is confirmed that the laundry has been dried. After step S82 is executed, the overload prevention control method ends.

As shown in fig. 2, when the determination result in step S3 is yes, it indicates that the humidity of the air duct is high, and the laundry is not dried yet. At this time, step S4 is executed to determine whether the refrigeration system 1 is in the later stage of operation. It should be noted that the whole operation cycle of the drying program can be divided into three stages, namely, an early stage operation, a middle stage operation and a late stage operation. The early operation period is the first 1/5 period of the whole operation period; the middle operation period is the 1/5 th to 4/5 th period of the whole operation period; the later operation period is the last 1/5 period of the whole operation period. The clothes care equipment can judge the current stage according to the running time length. If the determination is no, the refrigeration system 1 is in the pre-operation stage or the middle operation stage, and in this case, step S51 is executed to detect the duct temperature T0, the condensation temperature Tk, the evaporation temperature Tc, the discharge temperature Td, and the suction temperature Ts. In one or more embodiments, a plurality of temperature detecting devices are disposed in the laundry care device, and are respectively used for detecting an air path temperature T0 of the laundry care device, a condensation temperature Tk of the condenser 12, an evaporation temperature Tc of the evaporator 14, a discharge temperature Td of the compressor 11, and a suction temperature Ts. In alternative embodiments, the clothes care device may obtain the air path temperature T0, the condensing temperature Tk of the condenser 12, the evaporating temperature Tc of the evaporator 14, the exhaust temperature Td of the compressor 11 and the suction temperature Ts in any suitable manner. Next, step S53 is performed, in which the degree of superheat SHtk of exhaust gas is determined based on the condensation temperature and the exhaust temperature, and the degree of superheat SHtc of intake gas is determined based on the evaporation temperature and the intake temperature. It can be understood that the discharge superheat SHtk of the compressor is the difference between the discharge temperature Td and the condensing temperature Tk, i.e., SHtk = Td-Tk; the suction superheat SHtc is the difference between the suction temperature Ts and the evaporation temperature Tc, i.e., SHtc = Ts-Tc. Next, step S61 is executed to determine whether the duct temperature T0 exceeds the duct temperature threshold T0 ', the suction superheat SHtc exceeds the suction superheat threshold SHtc ', and the discharge superheat SHtk exceeds the discharge superheat threshold SHtk '. In one or more embodiments, when the refrigeration system 1 is in the pre-operation period, the wind path temperature threshold T0 ' is 30 ℃, the suction superheat threshold SHtc ' is 4 ℃, and the discharge superheat threshold SHtk ' is 15 ℃; when the refrigeration system 1 is in the middle stage of operation, the wind path temperature threshold T0 ' is 55 ℃, the suction superheat threshold SHtc ' is 8 ℃, and the discharge superheat threshold SHtk ' is 35 ℃. In alternative embodiments, the air path temperature threshold T0 ', the suction superheat threshold SHtc ', and the discharge superheat threshold SHtk ' may be other suitable values determined according to the setting of the refrigeration system 1. When the determination result in step S61 is yes, that is, when the air duct temperature T0 exceeds the air duct temperature threshold T0 ', the suction superheat degree SHtc exceeds the suction superheat degree threshold SHtc ', and the discharge superheat degree SHtk exceeds the discharge superheat degree threshold SHtk ', the ambient temperature of the refrigeration system 1 of the laundry care device is high, and the compressor 11 is in the high-load operation state. In order to avoid unnecessary overload protection of the compressor 11, step S71 is executed, i.e. the refrigeration system 1 is controlled to switch to the overload prevention mode. Specifically, the first control valve 151 and the second control valve 152 are controlled to be closed, and the third control valve 161 and the fourth control valve 171 are controlled to be opened. Then, step S81 is performed, i.e., the refrigeration system 1 is controlled to operate in the overload prevention operation mode for a preset time period. In one or more embodiments, the predetermined period of time is 5 minutes. In alternative embodiments, the preset time period may be 8 minutes or any other suitable time period. Then, the process returns to step S4 to determine whether the refrigeration system 1 is in the later operation stage again.

With continued reference to fig. 3, when the determination result of step S61 is no, step S72 is performed, i.e., the refrigeration system 1 is controlled to operate in the normal mode. It will be appreciated that when the refrigeration system 1 is operating in the normal mode, the duct humidity is detected in real time to determine whether the clothes are dried, and if the clothes are not dried, it is determined whether the refrigeration system 1 is to be switched to the overload prevention operation mode. This process is cycled until the laundry is dried. Next, step S82 is performed, i.e., it is confirmed that the laundry has been dried. After step S82 is performed, the overload prevention control method for the clothes care apparatus of the present invention is ended.

As shown in fig. 3 and 4, when the determination result of step S4 is yes, the refrigeration system 1 is in the later stage of operation. Next, step S52 is executed, namely, detecting the duct temperature T0 of the refrigeration system 1. Then, step S62 is executed to determine whether the duct temperature T0 exceeds the duct temperature threshold T0'. In one or more embodiments, the threshold duct temperature T0' is 60 ℃ during a later period of operation of the refrigeration system 1. In alternative embodiments, the duct temperature threshold T0' may be other suitable values determined based on the settings of the refrigeration system 1. When the judgment result of step S62 is yes, the refrigeration system 1 is in a high ambient temperature, and step S71 is executed to control the refrigeration system 1 to switch to the overload prevention mode in order to prevent the compressor 11 from being unnecessarily protected from overload. Specifically, the first control valve 151 and the second control valve 152 are controlled to be closed, and the third control valve 161 and the fourth control valve 171 are controlled to be opened. Then, step S81 is performed, i.e., the refrigeration system 1 is controlled to operate in the overload prevention operation mode for a preset time period. In one or more embodiments, the predetermined period of time is 5 minutes. In alternative embodiments, the preset time period may be 8 minutes or any other suitable time period. Then, returning to step S62, it is determined again whether the duct temperature T0 exceeds the duct temperature threshold T0'.

With continued reference to fig. 4, when the determination result of step S62 is no, step S72 is performed, i.e., the refrigeration system 1 is controlled to operate in the normal mode. It will be appreciated that when the refrigeration system 1 is operating in the normal mode, the duct humidity is detected in real time to determine whether the laundry is dried, and in the event that the laundry is not dried, it is determined whether the refrigeration system 1 is to switch to the overload prevention mode of operation. This process is cycled until the laundry is dried. Next, step S82 is performed, i.e., it is confirmed that the laundry has been dried. After step S82 is performed, the overload prevention control method for the clothes care apparatus of the present invention is ended.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. A garment care device having a refrigeration system, and the refrigeration system comprising: a compressor, a condenser, an expansion device, and an evaporator, wherein the evaporator includes a first evaporator section and a second evaporator section, and wherein the refrigeration system has a normal mode of operation and an overload prevention mode of operation,

when the refrigeration system is in the normal operation mode, refrigerant in the refrigeration system is discharged from the compressor, flows through the condenser, the expansion device, the first evaporator part and the second evaporator part in sequence, and is sucked by the compressor; and

when the refrigeration system is in the overload prevention operation mode, the refrigerant is discharged from the compressor, flows through the condenser, the first evaporator portion, the expansion device and the second evaporator portion in sequence, and is sucked by the compressor.

2. A garment care device according to claim 1,

the compressor has a suction port and a discharge port;

the condenser is provided with a liquid outlet end and a gas inlet end communicated with the gas outlet; and is

The refrigeration system includes:

a main cooling flow path extending from the liquid outlet end to the suction port, the main cooling flow path including a first control valve, the expansion device, the first evaporator section, a second control valve, and the second evaporator section in this order along a flow direction of the refrigerant;

a first bypass flow path having a first end connected to a position of the main refrigerant flow path downstream of the liquid outlet end and upstream of the first control valve, and a second end connected to a position of the main refrigerant flow path downstream of the first evaporator portion and upstream of the second control valve, and a third control valve is provided on the first bypass flow path; and

a second bypass flow path having a third end connected to the main refrigeration flow path at a location downstream of the first control valve and upstream of the expansion device, and a fourth end connected to the main refrigeration flow path at a location downstream of the second control valve and upstream of the second evaporator section, and a fourth control valve is provided on the second bypass flow path,

wherein when the refrigeration system is in the normal operating mode, the first control valve and the second control valve are on, and the third control valve and the fourth control valve are off; and is

When the refrigeration system is in the overload prevention operation mode, the third control valve and the fourth control valve are conducted, and the first control valve and the second control valve are closed.

3. A garment care device as recited in claim 2, wherein said first control valve, said second control valve, said third control valve, and said fourth control valve are all solenoid valves.

4. A garment care device as claimed in claim 1, characterized in that the expansion means is a capillary tube or an expansion valve.

5. An overload prevention control method for a garment care device according to any one of claims 1-4, and comprising:

controlling the refrigeration system to operate in a normal operation mode;

detecting the air duct humidity of the clothes care equipment;

judging whether the air duct humidity is greater than or equal to an air duct humidity threshold value or not;

when the air duct humidity is greater than or equal to the air duct humidity threshold value, judging whether the refrigerating system is in the later operation stage;

when the refrigerating system is in a later operation stage, detecting the air duct temperature of the clothes care equipment;

judging whether the air duct temperature is greater than an air duct temperature threshold value;

and when the air duct temperature is greater than the air duct temperature threshold value, controlling the refrigerating system to be switched to an overload prevention operation mode.

6. The overload control method according to claim 5, further comprising:

controlling the refrigerating system to operate in the overload prevention operation mode for a preset time;

and after the preset duration is continued, whether the air duct temperature is greater than the air duct temperature threshold value is judged again.

7. The overload control method according to claim 5, further comprising:

when the refrigerating system is in the early stage of operation or the middle stage of operation, detecting the air duct temperature, the condensing temperature, the evaporating temperature, the exhaust temperature and the suction temperature of the refrigerating system;

determining a discharge superheat degree based on the condensing temperature and the discharge temperature, and determining a suction superheat degree based on the evaporating temperature and the suction temperature;

judging whether the air duct temperature is greater than the air duct temperature threshold value, whether the air suction superheat degree is greater than the air suction superheat degree threshold value and whether the exhaust superheat degree is greater than the exhaust superheat degree threshold value;

when the air duct temperature is larger than the air duct temperature threshold value, the suction superheat degree is larger than the suction superheat degree threshold value, and the exhaust superheat degree is larger than the exhaust superheat degree threshold value, controlling the refrigeration system to be switched to the overload prevention operation mode;

controlling the refrigeration system to operate in the overload prevention operation mode for a preset time period,

the exhaust superheat degree is the difference between the exhaust temperature and the condensation temperature, and the suction superheat degree is the difference between the suction temperature and the evaporation temperature.

8. The overload control method according to claim 5, further comprising: and when the air duct temperature is less than or equal to the air duct temperature threshold value, controlling the refrigeration system to operate in the normal operation mode.

9. The overload control method according to claim 7, further comprising:

and when the air duct temperature is less than or equal to the air duct temperature threshold value, or when the suction superheat degree is less than or equal to the suction superheat degree threshold value, or when the exhaust superheat degree is less than or equal to the exhaust superheat degree threshold value, controlling the refrigeration system to operate in the normal mode.

10. The overload control method according to any one of claims 5 to 9, wherein the refrigeration system includes a main refrigeration flow path, a first bypass flow path and a second bypass flow path, and wherein the main refrigeration flow path, the first bypass flow path and the second bypass flow path are arranged in parallel with each other

When the refrigeration system operates in the normal operation mode, controlling the first control valve and the second control valve of the main refrigeration flow path to be communicated, and closing the third control valve of the first bypass flow path and the fourth control valve of the second bypass flow path; and

when the refrigeration system operates in the overload prevention operation mode, the third control valve and the fourth control valve are controlled to be conducted, and the first control valve and the second control valve are closed.

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