CN113293584A - Control method of auxiliary cooling device of heat pump system and heat pump type drying equipment - Google Patents

Control method of auxiliary cooling device of heat pump system and heat pump type drying equipment Download PDF

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Publication number
CN113293584A
CN113293584A CN202010106660.3A CN202010106660A CN113293584A CN 113293584 A CN113293584 A CN 113293584A CN 202010106660 A CN202010106660 A CN 202010106660A CN 113293584 A CN113293584 A CN 113293584A
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Prior art keywords
cooling device
temperature
heat pump
preset
stage
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Inventor
宋宜俊
姚龙平
杜兆斌
马洪彪
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Qingdao Haier Drum Washing Machine Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Drum Washing Machine Co Ltd
Haier Smart Home Co Ltd
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Priority to CN202010106660.3A priority Critical patent/CN113293584A/en
Publication of CN113293584A publication Critical patent/CN113293584A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements
    • 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
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

The invention relates to the technical field of clothes drying equipment, and discloses a control method of an auxiliary cooling device of a heat pump system and heat pump type drying equipment. The control method of the auxiliary cooling device of the heat pump system comprises the following steps: obtaining initial ambient temperature T before working of heat pump systemFirst stage(ii) a According to the initial ambient temperature TFirst stageDetermining a time node for starting the auxiliary cooling device; according to the difference T between the temperature of hot air entering the drum and the temperature of wet air exiting the drumDifference (D)Combined with initial ambient temperature TFirst stageAnd determining the time node of the auxiliary cooling device closing. The control method of the auxiliary cooling device of the heat pump system can control the opening of the auxiliary cooling device according to different seasons and different environmental temperatures, so that the heat pump system is energy-saving, the auxiliary cooling device can be opened in time, and the heat pump is improvedThe working efficiency of the system; whether the moisture content of the clothes meets the drying requirement can be accurately and timely judged so as to timely close the auxiliary cooling device, and the energy saving rate of the heat pump system is further improved.

Description

Control method of auxiliary cooling device of heat pump system and heat pump type drying equipment
Technical Field
The invention relates to the technical field of clothes drying equipment, in particular to a control method of an auxiliary cooling device of a heat pump system and heat pump type drying equipment.
Background
In the conventional heat pump type drying apparatus, heated air that has been superheated by a condenser in a heat pump cycle system is sent into a drum containing laundry, humid air deprived of moisture from the laundry is sent back to an evaporator to be dehumidified, and the dehumidified air is heated again by the condenser and sent into the drum. However, during the operation of the heat pump system, as the temperature increases, the condensing temperature of the compressor approaches the limit of the maximum pressure, which affects the operation efficiency of the heat pump system.
In order to improve the working efficiency of the heat pump system, an auxiliary cooling device is usually designed for cooling the compressor and the heat pump system, and the auxiliary cooling device works in the later drying stage or in a high-temperature environment to adjust the load of the compressor. However, the time for turning on and off the auxiliary cooling device directly affects the working efficiency of the heat pump system, and therefore, it is necessary to provide a control method of the auxiliary cooling device to accurately control the turning on and off of the auxiliary cooling device.
Disclosure of Invention
The invention aims to provide a control method of an auxiliary cooling device of a heat pump system, which can accurately control the opening and closing of the auxiliary cooling device and improve the working efficiency of the heat pump system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of an auxiliary cooling device of a heat pump system comprises the following steps:
obtaining initial ambient temperature T before working of heat pump systemFirst stage；
According to the initial ambient temperature TFirst stageDetermining a time node for starting the auxiliary cooling device;
according toThe difference T between the temperature of the hot air entering the drum and the temperature of the humid air exiting the drumDifference (D)In combination with the initial ambient temperature TFirst stageAnd determining the time node of the auxiliary cooling device.
Preferably, the determining the time node of the auxiliary cooling device starting according to the initial environment temperature includes:
if the initial ambient temperature TFirst stage＜T1Then the auxiliary cooling device works at the heat pump system t1Opening after time;
if the initial ambient temperature T1≤TFirst stage≤T2Then the auxiliary cooling device works at the heat pump system t2Opening after time;
if the initial ambient temperature TFirst stage＞T2Then the auxiliary cooling device works at the heat pump system t3Opening after time;
wherein, T1＜T2，t1＞t2＞t3。
Preferably, the difference T is determined according to the temperature of the hot air entering the drum and the temperature of the wet air exiting the drumDifference (D)In combination with the initial ambient temperature TFirst stageDetermining a time node at which the secondary cooling device is turned off comprises:
corresponding to each TFirst stageStoring a value setting one of the TDifference (D)Preset temperature value TPreset of；
According to the actually obtained initial environment temperature TFirst stageDetermining the ratio of T toFirst stageStoring value of said TDifference (D)Preset temperature value TPreset of；
Judgment of TDifference (D)Whether or not less than TPreset ofAnd if so, closing the auxiliary cooling device.
Preferably, if TDifference (D)Greater than or equal to TPreset ofAnd the auxiliary cooling device continues to work.
Preferably, if the initial ambient temperature TFirst stage＜T1，TFirst stageCorresponding TDifference (D)The preset temperature values are first preset temperature values TPreset 1Then T isDifference (D)Less than a first preset temperature value TPreset 1The auxiliary cooling device is closed;
if the initial ambient temperature T1≤TFirst stage≤T2，TFirst stageCorresponding TDifference (D)The preset temperature values are second preset temperature values TPreset 2Then T isDifference (D)Less than a second preset temperature value TPreset 2The auxiliary cooling device is closed;
if the initial ambient temperature TFirst stage＞T2，TFirst stageCorresponding TDifference (D)The preset temperature values are all third preset temperature values TPreset 3Then T isDifference (D)Less than a third preset temperature value TPreset 3The auxiliary cooling device is closed;
wherein, T1＜T2At the same point in time, TPreset 1＜TPreset 2＜TPreset 3。
Preferably, said T1Is set to a value of 10 to 20 ℃, said T2The value of (A) is set to 30 to 40 ℃.
Preferably, said t1Set to 35-45min, t2Set to 25-35min, t3Setting for 15-25 min.
Preferably, the initial ambient temperature T before the heat pump system works is obtainedFirst stageThe method comprises the following steps:
collecting the temperature at the outlet of the condenser as the initial ambient temperature TFirst stage(ii) a Or
Collecting the temperature at the outlet of the compressor as the initial ambient temperature TFirst stage。
Preferably, the temperature at the outlet of the condenser is collected as the temperature of said hot air entering the drum.
The invention also aims to provide heat pump type drying equipment, which has high working efficiency by adopting a control method of an auxiliary cooling device of a heat pump system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heat pump type drying device adopts the control method of the auxiliary cooling device of the heat pump system.
The invention has the beneficial effects that:
according to the control method of the auxiliary cooling device of the heat pump system, the starting time node of the auxiliary cooling device is determined according to the initial environment temperature before the heat pump system works, the starting of the auxiliary cooling device can be controlled according to different seasons and different environment temperatures, so that the heat pump system is energy-saving, the auxiliary cooling device can be started in time, and the working efficiency of the heat pump system is improved; the difference value between the temperature of hot air entering the roller and the temperature of wet air discharged from the roller is related to the outside temperature, and the difference value is combined with the initial environment temperature to accurately and timely judge whether the moisture content of the clothes meets the drying requirement or not, so that the auxiliary cooling device is timely closed, and the energy saving rate of the heat pump system is further improved.
The heat pump type drying equipment provided by the invention adopts the control method of the auxiliary cooling device of the heat pump system, so that the working efficiency of the drying equipment is improved, the drying equipment is more energy-saving, and the using satisfaction of a user is improved.
Drawings
Fig. 1 is a flowchart illustrating main steps of a method for controlling a secondary cooling device of a heat pump system according to an embodiment of the present invention;
FIG. 2 is a table showing the temperature change of hot air entering the drum and the temperature change of wet air exiting the drum according to an embodiment of the present invention;
FIG. 3 is a graph showing a variation in a difference between a temperature at which hot air is introduced into the drum and a temperature at which humid air is discharged from the drum at an initial ambient temperature of 30 ℃ according to an embodiment of the present invention;
FIG. 4 is a graph showing a variation in a difference between a temperature at which hot air is introduced into the drum and a temperature at which humid air is discharged from the drum at an initial ambient temperature of 20 deg.C, according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating the detailed steps of a method for controlling a sub-cooling device of a heat pump system according to a second embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the prior art, an auxiliary cooling device is usually designed for cooling a compressor and a heat pump system, and the auxiliary cooling device works in the later drying stage or in a high-temperature environment to adjust the load of the compressor. However, the time for turning on and off the auxiliary cooling device directly affects the working efficiency of the heat pump system, and therefore, the present embodiment provides a method for controlling the auxiliary cooling device of the heat pump system to solve the above problem.
Example one
Fig. 1 is a flowchart illustrating main steps of a method for controlling an auxiliary cooling device of a heat pump system, and as shown in fig. 1, the method for controlling an auxiliary cooling device of a heat pump system provided in this embodiment includes the following steps:
step one, obtaining initial environment temperature T before work of a heat pump systemFirst stage。
Specifically, in general, after the drying device is placed in the use environment for a period of time, the temperature of the drying device itself is equal to the external environment temperature, and within 1-2min of the start-up of the drying device, the heat pump system will not work, so that the measured temperature is the initial environment temperature TFirst stage。
In this embodiment, since the condenser outlet and the compressor outlet are usually provided with temperature sensors, in order to reduce the production cost of the heat pump system, the temperature sensors on the heat pump system may be directly used to collect the temperature, that is, the initial ambient temperature may be the temperature at the condenser outlet or the temperature at the compressor outlet. In addition, a temperature sensor can be arranged at a proper position on the drying equipment, for example, on a shell of the drying equipment, and the temperature sensor can be independently used for detecting the initial environment temperature, so that the detection accuracy is improved.
Step two, according to the initial environment temperature TFirst stageAnd determining the time node of the auxiliary cooling device.
Specifically, if the initial ambient temperature is low, the heat pump system can be started for a long time and then the auxiliary cooling device is started again, and if the initial ambient temperature is high, the heat pump system can be started for a short time and then the auxiliary cooling device is started, so that the working efficiency of the heat pump system can be improved, and the purpose of saving energy can be achieved.
In this embodiment, it is considered that the initial ambient temperature is influenced by seasons obviously, and the heat pump system is influenced by the external environment obviously, so the time node for opening the auxiliary cooling device is set to be three, and the three time nodes respectively correspond to winter, spring and autumn and summer, and are divided as follows: if the initial ambient temperature TFirst stage＜T1Then the auxiliary cooling device works in the heat pump system t1After time on, T1The setting of (1) corresponds to winter temperature; if the initial ambient temperature T1≤TFirst stage≤T2Then the auxiliary cooling device works in the heat pump system t2After time on, T2The setting of (1) corresponds to the temperature in spring and autumn; if the initial ambient temperature TFirst stage＞T2Then the auxiliary cooling device works in the heat pump system t3After time on, T3The setting of (1) corresponds to the summer temperature; wherein, T1＜T2，t1＞t2＞t3. According to the setting mode, the lower the initial environment temperature is, the longer the time for delaying the starting of the auxiliary cooling device is, and the time node for starting the auxiliary cooling device is divided into three stages according to seasons, so that the early-stage rapid heating of the heat pump system to the ideal drying temperature range is facilitated, the drying efficiency is improved, the starting of the auxiliary cooling device can be accurately controlled, and the working efficiency of the heat pump system is improved.
In the present embodiment, T1Is set to a value of 10-20 deg.C, preferably 15 deg.C, T2The value of (2) is set to be 30-40 ℃, preferably 35 ℃, and the divided temperature values correspond to three time periods of summer, spring, autumn and winter, so that the accuracy of determining the starting time point of the auxiliary cooling device is improved. t is t1Set to 35-45min, preferably 40min, t2Set to 25-35min, preferably to 30min, t3The time is set to 15-25min, preferably 20 min. The heat pump system needs a time period for early temperature rise, the numerical value is a common value of the heat pump type drying equipment, the auxiliary cooling device is started after the heat pump system works for different time according to different external environment temperatures, the purposes of energy conservation and emission reduction are achieved, and the temperature rise time is related to the power and matching of the heat pump system.
Step three, according to the difference T between the temperature of the hot air entering the roller and the temperature of the wet air exiting the rollerDifference (D)Combined with initial ambient temperature TFirst stageAnd determining the time node of the auxiliary cooling device closing.
Specifically, in the initial stage of drying by the drying apparatus, as shown in fig. 2, the temperature difference between the temperature of the hot air entering the drum and the temperature of the humid air exiting the drum is relatively large, and in the later stage of drying by the drying apparatus, the temperature of the hot air entering the drum and the temperature of the humid air exiting the drum are relatively small, and when the difference is smaller than a certain value, it indicates that the clothes to be dried is smaller than the preset moisture content value, and at this time, the auxiliary cooling device can be turned off, so as to save the energy consumption of the drying apparatus. However, the difference between the temperature of the hot air entering the drum and the temperature of the humid air exiting the drum is related to the initial ambient temperature. Fig. 3 is a graph showing a change in a difference between a temperature at which hot air is introduced into the drum and a temperature at which humid air is discharged from the drum at an initial ambient temperature of 30 deg.c, fig. 4 is a graph showing a change in a difference between a temperature at which hot air is introduced into the drum and a temperature at which humid air is discharged from the drum at an initial ambient temperature of 20 deg.c, and the initial moisture content of the laundry embodied in fig. 3 and 4 is the same, but in a case where the moisture content of the laundry is the same or similar at a later stage of drying, and the temperature difference between the drum-in and drum-out is different at different initial ambient temperatures. Therefore, the initial ambient temperature is also one of the determinants of the time node at which the secondary cooling device is turned off. The time node for closing the auxiliary cooling device is determined by combining the difference value of the temperature of hot air entering the roller and the temperature of wet air discharged from the roller with the initial environment temperature, so that the accuracy of closing the auxiliary cooling device is improved, and the energy-saving performance of the drying equipment is further improved.
In this embodiment, because the temperature at condenser exit is the closest with the temperature of cylinder air inlet department, consequently with the simple temperature of handling back in condenser exit as the temperature of hot-air admission cylinder, need not to install extra sensor and detect, under the prerequisite of guaranteeing to detect the precision, reduced drying equipment's manufacturing cost. In other embodiments, a temperature sensor for detecting hot air may be provided on the air circulation duct near the drum air intake. A temperature sensor for detecting the humid air is arranged on the air circulation pipeline at the air outlet of the roller, so that the temperature value of the humid air can be accurately collected.
The embodiment also provides heat pump type drying equipment, and the control method of the auxiliary cooling device of the heat pump system is adopted, so that the working efficiency of the drying equipment is improved, the drying equipment is more energy-saving, and the using satisfaction of a user is improved.
Example two
Fig. 5 is a flowchart illustrating detailed steps of a method for controlling an auxiliary cooling device of a heat pump system, and as shown in fig. 5, the method for controlling an auxiliary cooling device of a heat pump system according to this embodiment includes the following steps:
step one, obtaining initial environment temperature T before work of a heat pump systemFirst stage。
Specifically, in general, after the drying device is placed in the use environment for a period of time, the temperature of the drying device itself is equal to the external environment temperature, and within 1-2min of the start-up of the drying device, the heat pump system will not work, so that the measured temperature is the initial environment temperature TFirst stage。
In this embodiment, since the condenser outlet and the compressor outlet are usually provided with temperature sensors, in order to reduce the production cost of the heat pump system, the temperature sensors on the heat pump system may be directly used to collect the temperature, that is, the initial ambient temperature may be the temperature at the condenser outlet or the temperature at the compressor outlet. In addition, a temperature sensor can be arranged at a proper position on the drying equipment, for example, on a shell of the drying equipment, and the temperature sensor can be independently used for detecting the initial environment temperature, so that the detection accuracy is improved.
Step two, according to the initial environment temperature TFirst stageAnd determining the time node of the auxiliary cooling device.
Specifically, if the initial ambient temperature is low, the heat pump system can be started for a long time and then the auxiliary cooling device is started again, and if the initial ambient temperature is high, the heat pump system can be started for a short time and then the auxiliary cooling device is started, so that the working efficiency of the heat pump system can be improved, and the purpose of saving energy can be achieved.
In this embodiment, it is considered that the initial ambient temperature is influenced by seasons and the heat pump system is influenced by the external environment, so that the number of time nodes for starting the auxiliary cooling device is three, and the three time nodesThe points respectively correspond to winter, spring and autumn and summer, and are specifically divided as follows: if the initial ambient temperature TFirst stage＜T1Then the auxiliary cooling device works in the heat pump system t1After time on, T1The setting of (1) corresponds to winter temperature; if the initial ambient temperature T1≤TFirst stage≤T2Then the auxiliary cooling device works in the heat pump system t2After time on, T2The setting of (1) corresponds to the temperature in spring and autumn; if the initial ambient temperature TFirst stage＞T2Then the auxiliary cooling device works in the heat pump system t3After time on, T3The setting of (1) corresponds to the summer temperature; wherein, T1＜T2，t1＞t2＞t3. According to the setting mode, the lower the initial environment temperature is, the longer the starting time of the auxiliary cooling device is delayed, and the starting time node of the auxiliary cooling device is divided into three stages according to seasons, so that the starting of the auxiliary cooling device can be accurately controlled, and the working efficiency of the heat pump system is improved.
In the present embodiment, T1Is set to a value of 10-20 deg.C, preferably 15 deg.C, T2The value of (2) is set to be 30-40 ℃, preferably 35 ℃, and the divided temperature values correspond to three time periods of summer, spring, autumn and winter, so that the accuracy of determining the starting time point of the auxiliary cooling device is improved. t is t1Set to 35-45min, preferably 40min, t2Set to 25-35min, preferably to 30min, t3The time is set to 15-25min, preferably 20 min. The heat pump system needs a time period for early temperature rise, the numerical value is a common value of the heat pump type drying equipment, the auxiliary cooling device is started after the heat pump system works for different time according to different external environment temperatures, the purposes of energy conservation and emission reduction are achieved, and the temperature rise time is related to the power and matching of the heat pump system.
Step three, obtaining the temperature of the hot air entering the roller and the temperature of the wet air discharged from the roller, and calculating the difference T between the two temperaturesDifference (D)。
Specifically, in the working process of the drying equipment, the temperature of hot air entering the drum and the temperature of humid air discharged from the drum are obtained in real time, the difference value of the hot air and the humid air is calculated, whether the dried clothes are smaller than the preset moisture content or not can be judged according to the difference value, and the smaller the difference value of the two is, the closer the difference value is to the preset moisture content.
In this embodiment, because the temperature at the outlet of the condenser is the closest to the temperature at the air inlet of the drum (refer to fig. 2), the temperature at the outlet of the condenser is simply processed and then used as the temperature of hot air entering the drum, and an additional sensor is not required to be installed for detection, so that the production cost of the drying equipment is reduced on the premise of ensuring the detection precision. In other embodiments, a temperature sensor for detecting hot air may be provided on the air circulation duct near the drum air intake. A temperature sensor for detecting the humid air is arranged on the air circulation pipeline at the air outlet of the roller, so that the temperature value of the humid air can be accurately collected.
Step four, adjusting and initial environment temperature TFirst stageCorresponding preset temperature value TPreset ofJudgment of TDifference (D)Whether it is less than the preset temperature value TPreset ofAnd executes the corresponding program.
Specifically, the difference between the temperature of the hot air entering the drum and the temperature of the humid air exiting the drum is related to the initial ambient temperature, fig. 3 is a graph showing the change of the difference between the temperature of the hot air entering the drum and the temperature of the humid air exiting the drum at an initial ambient temperature of 30 ℃, fig. 4 is a graph showing the change of the difference between the temperature of the hot air entering the drum and the temperature of the humid air exiting the drum at an initial ambient temperature of 20 ℃, the initial moisture content of the laundry embodied in fig. 3 and 4 is the same, but in the later stage of drying, the moisture content of the laundry is the same or similar, and in different initial ambient temperatures, the temperature difference between the entering drum and the exiting drum is different, and the initial ambient temperature is also one of the determining factors of the time node of the auxiliary cooling device being turned off. Therefore, the initial ambient temperature T is set in the control system of the drying apparatusFirst stageAnd a preset temperature value TPreset ofCorresponding to each TFirst stageStoring value setting a TDifference (D)Preset temperature value TPreset ofAccording to the initial environmental temperature T actually obtained in the step IFirst stageEnsure thatIs determined to the TFirst stageStoring value of said TDifference (D)Preset temperature value TPreset ofAnd a difference value T between the temperature of the hot air entering the drum and the temperature of the wet air exiting the drumDifference (D)And a preset temperature value TPreset ofAnd comparing, the accuracy of the closing time node of the auxiliary cooling device is improved, the drying efficiency of the heat pump system is improved, and the heat pump system is efficient and energy-saving. If TDifference (D)Less than and initial ambient temperature TFirst stageCorresponding preset temperature value TPreset ofIn this environment, the auxiliary cooling device is turned off to avoid resource waste if the clothes meet the corresponding drying requirement. If TDifference (D)Greater than or equal to the initial ambient temperature TFirst stageCorresponding preset temperature value TPreset ofIn this environment, the auxiliary cooling device continues to work to ensure that the clothes can meet the drying requirement if the clothes do not meet the corresponding drying requirement.
In this embodiment, the initial ambient temperature is divided into three stages, the same as the division mode of the time node for setting the start of the auxiliary cooling device, each stage corresponds to a preset temperature value, and when the acquired initial ambient temperature is in one of the stages, T is determinedDifference (D)And comparing with the preset temperature value corresponding to the stage. The method is specifically divided into the following steps: if the initial ambient temperature TFirst stage＜T1，TFirst stageCorresponding TDifference (D)The preset temperature values are first preset temperature values TPreset 1Then T isDifference (D)Less than a first preset temperature value TPreset 1The auxiliary cooling device is closed; if the initial ambient temperature T1≤TFirst stage≤T2，TFirst stageCorresponding TDifference (D)The preset temperature values are second preset temperature values TPreset 2Then T isDifference (D)Less than a second preset temperature value TPreset 2The auxiliary cooling device is closed; if the initial ambient temperature TFirst stage＞T2，TFirst stageCorresponding TDifference (D)The preset temperature values are all third preset temperature values TPreset 3Then T isDifference (D)Less than a third preset temperature value TPreset 3The auxiliary cooling device is closed; wherein, T1＜T2，TPreset 1、TPreset 2And TPreset 3Are all functions of time, so that at the same point in time, TPreset 1＜TPreset 2＜TPreset 3. According to the setting mode, the closing time nodes of the auxiliary cooling devices are different according to different environments, so that the closing accuracy of the auxiliary cooling devices is improved, the working efficiency of the heat pump system is improved, and the energy consumption of the heat pump system is reduced.
The embodiment also provides heat pump type drying equipment, and the control method of the auxiliary cooling device of the heat pump system is adopted, so that the working efficiency of the drying equipment is improved, the drying equipment is more energy-saving, and the using satisfaction of a user is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A control method of an auxiliary cooling device of a heat pump system is characterized by comprising the following steps:
obtaining initial ambient temperature T before working of heat pump systemFirst stage；
According to the initial ambient temperature TFirst stageDetermining a time node for starting the auxiliary cooling device;
according to the difference T between the temperature of hot air entering the drum and the temperature of wet air exiting the drumDifference (D)In combination with the initial ambient temperature TFirst stageAnd determining the time node of the auxiliary cooling device.
2. The method of claim 1, wherein determining the time node at which the secondary cooling device is turned on based on the initial ambient temperature comprises:
if the initial ambient temperature TFirst stage＜T1Then the auxiliary cooling device works at the heat pump system t1Opening after time;
if the initial ambient temperature T1≤TFirst stage≤T2Then the auxiliary cooling device works at the heat pump system t2Opening after time;
if the initial ambient temperature TFirst stage＞T2Then the auxiliary cooling device works at the heat pump system t3Opening after time;
wherein, T1＜T2，t1＞t2＞t3。
3. The method of claim 1, wherein the controlling of the supplementary cooling device of the heat pump system is performed according to a difference T between a temperature of the hot air entering the drum and a temperature of the humid air exiting the drumDifference (D)In combination with the initial ambient temperature TFirst stageDetermining a time node at which the secondary cooling device is turned off comprises:
corresponding to each TFirst stageStoring a value setting one of the TDifference (D)Preset temperature value TPreset of；
According to the actually obtained initial environment temperature TFirst stageDetermining the ratio of T toFirst stageStoring value of said TDifference (D)Preset temperature value TPreset of；
Judgment of TDifference (D)Whether or not less than TPreset ofAnd if so, closing the auxiliary cooling device.
4. The method of claim 3, wherein if T is greater than T, the method further comprisesDifference (D)Greater than or equal to TPreset ofAnd the auxiliary cooling device continues to work.
5. The method for controlling a sub-cooling device of a heat pump system according to claim 3,
if the initial ambient temperature TFirst stage＜T1，TFirst stageCorrespond toT ofDifference (D)The preset temperature values are first preset temperature values TPreset 1Then T isDifference (D)Less than a first preset temperature value TPreset 1The auxiliary cooling device is closed;
if the initial ambient temperature T1≤TFirst stage≤T2，TFirst stageCorresponding TDifference (D)The preset temperature values are second preset temperature values TPreset 2Then T isDifference (D)Less than a second preset temperature value TPreset 2The auxiliary cooling device is closed;
if the initial ambient temperature TFirst stage＞T2，TFirst stageCorresponding TDifference (D)The preset temperature values are all third preset temperature values TPreset 3Then T isDifference (D)Less than a third preset temperature value TPreset 3The auxiliary cooling device is closed;
wherein, T1＜T2At the same point in time, TPreset 1＜TPreset 2＜TPreset 3。
6. Method for controlling a secondary cooling device of a heat pump system according to claim 2 or 5, characterized in that said T is1Is set to a value of 10 to 20 ℃, said T2The value of (A) is set to 30 to 40 ℃.
7. The method for controlling a secondary cooling device of a heat pump system according to claim 2, wherein t is t1Set to 35-45min, t2Set to 25-35min, t3Setting for 15-25 min.
8. The method for controlling an auxiliary cooling device of a heat pump system according to claim 1, wherein the initial ambient temperature T before the operation of the heat pump system is obtainedFirst stageThe method comprises the following steps:
collecting the temperature at the outlet of the condenser as the initial ambient temperature TFirst stage(ii) a Or
Collecting the temperature at the outlet of the compressor as the initial ambient temperature TFirst stage。
9. The method for controlling a secondary cooling device of a heat pump system according to claim 1, wherein the temperature at the outlet of the condenser is collected as the temperature of the hot air entering the drum.
10. A heat pump type drying apparatus characterized by adopting the control method of the auxiliary cooling device of the heat pump system according to any one of claims 1 to 9.
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