CN210374155U - Reheating and dehumidifying integrated refrigerating system - Google Patents

Reheating and dehumidifying integrated refrigerating system Download PDF

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Publication number
CN210374155U
CN210374155U CN201921210407.1U CN201921210407U CN210374155U CN 210374155 U CN210374155 U CN 210374155U CN 201921210407 U CN201921210407 U CN 201921210407U CN 210374155 U CN210374155 U CN 210374155U
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China
Prior art keywords
heat exchanger
indoor
dehumidification
control
fan
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CN201921210407.1U
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Chinese (zh)
Inventor
孙妍
邓李娇
李欣
叶强蔚
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The utility model provides a reheat dehumidification integration refrigerating system, refrigerating system includes: the dehumidification system comprises a compressor (5), an outdoor heat exchanger (6), an indoor first heat exchanger (1) and an indoor second heat exchanger (2), wherein the outdoor heat exchanger (6) and a first throttling device (8) are further connected and arranged between the indoor first heat exchanger (1), a first outer fan (7) is arranged at the outdoor heat exchanger (6) and can control dehumidification through the control of the wind speed of the first outer fan (7), and the reheating quantity of the indoor first heat exchanger (1) or the reheating quantity of the indoor second heat exchanger (2) is controlled. Through the utility model discloses can control the wind speed of first outer quick-witted fan with the control outdoor heat exchanger in the heat release of refrigerant, consequently the reheat volume when dehumidification in the control room need not be again through the amount of wind that changes indoor air supply to can not influence user's travelling comfort, improved the comfort level effectively.

Description

Reheating and dehumidifying integrated refrigerating system
Technical Field
The utility model belongs to the technical field of the compressor, concretely relates to reheat and dehumidification integration refrigerating system.
Background
In summer, the humidity of outdoor air is high, the dehumidification process is usually accompanied with the reduction of temperature, and air conditioners in the market generally realize the reheating function by utilizing electric heating, so that the energy waste is caused while the power consumption is increased; some air conditioners on the market realize reheating through retrieving the condensation heat, and the reheat temperature is controlled to fan wind speed control in the control, influences user's travelling comfort requirement. In the prior art, the frequency of a CN201510120040.4 compressor controls the dehumidification capacity, the reheat capacity is controlled by the wind speed of an inner fan, the air supply quantity is changed while the reheat capacity is controlled, and the comfort requirement of a user is influenced; CN201510129192.0 reduces the wind speed to the lowest to determine the moisture load and then enters a dehumidification mode, the wind speed of the reheat inner fan is controlled by the wind speed of the inner fan to determine the load, and the air supply quantity of the inner fan is controlled to control the reheat dehumidification, which also affects the comfort requirement of the user; CN201610921110.0 ensures constant temperature and humidity by switching the area of a condenser and the area of an evaporator, and has multiple types of heat exchangers, large occupied space and large flow resistance of a refrigerator; the control objects of the CN200810071196.8 temperature and humidity control mechanism are the rotation speed of the fan of the indoor unit and the cooling capacity, humidity control moisture content, and moisture content control inaccuracy of the outdoor unit, which also affect the comfort requirement of the user.
Because the reheating dehumidification refrigeration system in the prior art controls the reheating quantity through the air speed of the inner fan, the air supply quantity is changed while the reheating quantity is controlled, and the comfort requirement of a user is influenced; guarantee constant temperature and humidity through switching condenser area and evaporimeter area, the heat exchanger kind is many, and it is big to account for the space, technical problem such as refrigerator flow resistance is big, consequently the utility model discloses research and design a reheat dehumidification integration refrigerating system.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming reheat dehumidification refrigerating system among the prior art and having the defect that changes the indoor air supply amount of wind influence user's travelling comfort requirement when the control is thermal again to a reheat dehumidification integration refrigerating system is provided.
The utility model provides a reheat dehumidification integration refrigerating system, it includes:
the indoor heat exchanger comprises a compressor, an outdoor heat exchanger, an indoor first heat exchanger and an indoor second heat exchanger, wherein a first throttling device is further connected and arranged between the outdoor heat exchanger and the indoor first heat exchanger, a first outer fan is arranged at the outdoor heat exchanger, and the reheating quantity of the indoor first heat exchanger or the indoor second heat exchanger during dehumidification can be controlled by controlling the wind speed of the first outer fan.
Preferably, the first and second electrodes are formed of a metal,
and a conversion device is also connected and arranged between the indoor first heat exchanger and the indoor second heat exchanger, wherein the conversion device comprises a second throttling device and a control valve which are arranged in parallel.
Preferably, the first and second electrodes are formed of a metal,
an indoor unit fan is arranged at the indoor first heat exchanger or the indoor second heat exchanger; and/or the air conditioner also comprises an air outlet which exhausts air indoors to outdoors, and a second external fan blower is arranged in the air outlet.
Preferably, the first and second electrodes are formed of a metal,
the indoor heat exchanger is characterized by further comprising a four-way valve, wherein the four-way valve comprises four ports, and the four ports are respectively connected with the exhaust port of the compressor, the suction port of the compressor, the indoor second heat exchanger and the outdoor heat exchanger.
The utility model provides a pair of reheat dehumidification integration refrigerating system has following beneficial effect:
the utility model discloses an indoor first heat exchanger with connect between the indoor second heat exchanger and be provided with second throttling arrangement and control valve including parallelly connected setting, can refrigerate simultaneously, heat simultaneously or one refrigeration is heated under what kind of mode to two indoor heat exchangers as required, in order to satisfy the different demands under to the refrigeration mode, heat mode and dehumidification mode, and simultaneously through the first outer fan that outdoor heat exchanger department set up, can control the heat dissipation capacity with the control refrigerant to it, especially in dehumidification process, the wind speed through controlling first outer fan is with the heat release of control refrigerant in the outdoor heat exchanger, and because the heat release capacity of refrigerant is formed by the heat combination that the heat exchanger two that is used for heating when the heat release capacity of outdoor heat exchanger and indoor dehumidification emit, consequently when the heat release capacity of refrigerant reduces in the control outdoor heat exchanger, The heat release of the indoor heat exchanger for heating can be correspondingly increased, and when the heat release of the refrigerant in the outdoor heat exchanger is controlled to be increased, the heat release of the indoor heat exchanger for heating can be correspondingly reduced, so that the reheating amount during indoor dehumidification does not need to be changed, the comfort of users is not influenced, and the comfort is effectively improved.
Drawings
Fig. 1 is a structural and operational schematic diagram of the reheating and dehumidifying integrated refrigeration system of the present invention in the reheating and dehumidifying mode;
FIG. 2 is a schematic diagram of the structure and operation of the reheating and dehumidifying integrated refrigerating system of the present invention in the cooling mode;
FIG. 3 is a structural and operational schematic diagram of the reheating and dehumidifying integrated refrigerating system of the present invention operating in the heating mode;
fig. 4 is a control flowchart of a reheat amount control method of the reheat and dehumidification integrated refrigeration system according to the present invention.
The reference numbers in the figures denote:
1. an indoor first heat exchanger; 2. an indoor second heat exchanger; 3. a four-way valve; 4. a gas-liquid separator; 5. A compressor; 6. an outdoor heat exchanger; 7. a first outer unit fan; 8. a first throttling device; 9. a control valve; 10. a second throttling device; 11. an inner fan; 12. a second outdoor unit fan; 13. a conversion device; 14. An air outlet.
Detailed Description
As shown in fig. 1-3, the utility model provides a reheat and dehumidification integrated refrigerating system, it includes:
the indoor heat exchanger comprises a compressor 5, an outdoor heat exchanger 6, an indoor first heat exchanger 1 and an indoor second heat exchanger 2, wherein a first throttling device 8 is further connected and arranged between the outdoor heat exchanger 6 and the indoor first heat exchanger 1, a first outer fan 7 is arranged at the position of the outdoor heat exchanger 6 and can control reheating capacity of the indoor first heat exchanger 1 or the indoor second heat exchanger 2 during dehumidification through controlling wind speed of the first outer fan 7.
The utility model can control the first outer fan arranged at the outdoor heat exchanger to control the heat dissipation of the refrigerant, especially control the heat dissipation of the refrigerant in the outdoor heat exchanger by controlling the wind speed of the first outer fan in the dehumidification process, and because the heat release quantity of the refrigerant is formed by combining the heat released by the outdoor heat exchanger and the heat released by the heat exchanger for heating when the indoor dehumidification is carried out, therefore, when the heat release amount of the refrigerant in the outdoor heat exchanger is controlled to be reduced, the heat release amount of the heat exchanger used for heating indoors is correspondingly increased, when the heat release amount of the refrigerant in the outdoor heat exchanger is controlled to be increased, the heat release amount of the heat exchanger used for heating indoors is correspondingly reduced, therefore, the reheating quantity during indoor dehumidification is controlled without changing the air quantity of indoor air supply, so that the comfort of users is not influenced, and the comfort is effectively improved.
In order to meet the requirement of comfort level of users, the utility model provides a reheating and dehumidifying integrated device, a control system and a control method, the device has simple and reasonable structure and low production and manufacturing cost; the air reheating function is realized by utilizing the waste heat recovery of the condensed gas; the rotating speed of the outer fan is finely adjusted through the temperature difference ratio to control the reheating quantity. The high-efficiency energy-saving high-precision energy-saving constant-temperature constant-humidity control method is adopted to overcome the defects in the prior art, the dehumidification capacity required by the air conditioning system can be accurately judged according to the user requirements, the dehumidification capacity and the reheating capacity can be simultaneously operated, the synchronous control is realized, the comfort level of the user in the use of the air conditioner is improved, and the safe operation of the air conditioning system can be ensured.
Preferably, the first and second electrodes are formed of a metal,
a switching device 13 is further connected between the indoor first heat exchanger 1 and the indoor second heat exchanger 2, wherein the switching device 13 comprises a second throttling device 10 and a control valve 9 which are arranged in parallel. Through indoor first heat exchanger with connect between the indoor second heat exchanger and be provided with including parallelly connected second throttling arrangement and the control valve that sets up, can refrigerate simultaneously, heat simultaneously or one refrigerate one heats to two indoor heat exchangers under what kind of mode as required to satisfy different demands under to refrigeration mode, heating mode and the dehumidification mode.
The utility model discloses a reheat dehumidification integration refrigerating system (reheat dehumidification integrated device). The indoor first heat exchanger 1 can be used as an evaporator and a condenser, and is realized through a conversion device 13, the conversion device 13 is composed of a control valve 9 (preferably an electromagnetic valve) and a second throttling device 10 (preferably a capillary tube), the electromagnetic valve and the capillary tube are connected in parallel, one side of the electromagnetic valve is connected with the indoor first heat exchanger 1, and the other side of the electromagnetic valve is connected with the indoor second heat exchanger 2. The indoor second heat exchanger 2 is connected with the four-way valve, wherein the S end of the four-way valve is connected with the compressor 5 in an exhaust mode, the C end of the four-way valve is connected with the outdoor heat exchanger 6, the E end of the four-way valve is connected with the indoor second heat exchanger 2, and the D end of the four-way valve is connected with the gas-liquid separator 4. The indoor fan 11 can be installed in the indoor first heat exchanger 1 and then induced draft, so that complete heat exchange between outdoor fresh air and the indoor first heat exchanger 1 and between outdoor fresh air and the indoor second heat exchanger 2 is guaranteed, and the second outdoor fan 12 is used as an exhaust fan to exhaust processed return air to the outdoor (if the air supply mode is a circulating air mode, the indoor fan 11 and the second outdoor fan 12 can be combined into one fan for use), specifically as shown in fig. 1.
The sensor mainly includes: the return air channel is provided with a temperature sensor and a humidity sensor; arranging a temperature sensor outdoors; and acquiring the temperature and humidity values expected by the user through a remote controller or a manual operator.
1. The utility model discloses an outer fan control reheat temperature, effectively solve indoor dehumidification temperature and reduce, can not satisfy the problem that user's travelling comfort required, reduce outer fan rotational speed when realizing reheat function, replace traditional electric heating device to realize constant temperature dehumidification, reduce the power consumption energy consumption;
2. the reheating system of the utility model has simple pipeline flow path, effectively reduces the number of refrigerant pipelines, reduces pipeline resistance, and has small flow resistance of the refrigerant;
3. the utility model discloses can realize reheat dehumidification automated control, reheat dehumidification system control method guarantees air conditioning system's safe operation.
4. The utility model discloses a reheat converter can realize that heat exchanger evaporimeter and reheater freely switch, realizes that the function is diversified.
Preferably, the first and second electrodes are formed of a metal,
an indoor unit fan 11 is arranged at the indoor first heat exchanger 1 or the indoor second heat exchanger 2; and/or the air outlet 14 for exhausting air indoors to outdoors is also included, and the second outer fan blower 12 is also arranged in the air outlet. The air outlet of the indoor first heat exchanger or the indoor second heat exchanger can be controlled through the indoor fan, so that any one of the two heat exchangers is effectively controlled to heat or refrigerate, and particularly one heat and one refrigerate in the dehumidification and reheating processes; the second outer fan is arranged in the indoor-to-outdoor air outlet, so that the outlet air after heat exchange of the indoor heat exchanger can be effectively controlled to blow out towards the outdoor.
Preferably, the first and second electrodes are formed of a metal,
the indoor heat exchanger is characterized by further comprising a four-way valve 3, wherein the four-way valve 3 comprises four ports, and the four ports are respectively connected with the exhaust port of the compressor, the suction port of the compressor, the indoor second heat exchanger 2 and the outdoor heat exchanger 6. This is the utility model discloses an optimal configuration form can change and switch refrigerating system's mode through the cross valve, realizes that refrigerating system heats, refrigerates and dehumidifies and reheat between switch control.
As shown in fig. 4, the utility model provides a reheat dehumidification integration refrigerating system's control method, it uses any one before its use reheat dehumidification integration refrigerating system, according to indoor environment's demand, including dehumidification demand, reheat demand, refrigeration demand or the demand of heating to control refrigerating system, with to indoor control and the mode switching control that reheat dehumidification, refrigeration or heat of carrying out, through control first outer machine fan 7 is controlled with the reheat volume when carrying out indoor reheat dehumidification operation.
The utility model can control the first outer fan arranged at the outdoor heat exchanger to control the heat dissipation of the refrigerant, especially control the heat dissipation of the refrigerant in the outdoor heat exchanger by controlling the wind speed of the first outer fan in the dehumidification process, and because the heat release quantity of the refrigerant is formed by combining the heat released by the outdoor heat exchanger and the heat released by the heat exchanger for heating when the indoor dehumidification is carried out, therefore, when the heat release amount of the refrigerant in the outdoor heat exchanger is controlled to be reduced, the heat release amount of the heat exchanger used for heating indoors is correspondingly increased, when the heat release amount of the refrigerant in the outdoor heat exchanger is controlled to be increased, the heat release amount of the heat exchanger used for heating indoors is correspondingly reduced, therefore, the reheating quantity during indoor dehumidification is controlled without changing the air quantity of indoor air supply, so that the comfort of users is not influenced, and the comfort is effectively improved.
Preferably, the first and second electrodes are formed of a metal,
when the refrigeration system further comprises a four-way valve 3, when reheating dehumidification is needed in a room, the four-way valve 3 is controlled so that the outdoor heat exchanger 6 is communicated with the exhaust end of the compressor 5, the indoor second heat exchanger 2 is communicated with the suction end of the compressor 5 through the four-way valve 3, the opening degree of the first throttling device 8 is controlled to be maximum, the control valve 9 is controlled to be closed, and the second throttling device 10 is controlled to be opened. This is the utility model discloses a preferred control form of refrigerating system operation under the reheat dehumidification mode can realize preferred realization mode and the control under the reheat dehumidification mode, and indoor second heat exchanger evaporation heat absorption is in order to realize dehumidification, indoor first heat exchanger condensation heat release in order to carry out reheat effect this moment, and first throttling arrangement is not throttled, and second throttling arrangement realizes throttling action.
When the system receives a dehumidification signal, the first throttling device 8 (preferably an electronic expansion valve) is adjusted to the maximum opening degree, the control valve 9 (preferably an electromagnetic valve) in the conversion device 13 is closed, the E end of the four-way valve is connected with the D end, and the S end is connected with the C end. The refrigerant absorbs heat through the indoor second heat exchanger 2, enters the gas-liquid separator 4 through the four-way valve, is pressurized, heated and discharged by the compressor 5, enters the outdoor heat exchanger 6 for cooling, and because the first throttling device 8 (preferably an electronic expansion valve) is completely opened and has no throttling and pressure reducing effects, the indoor first heat exchanger 1 is still a condenser, and the refrigerant flows through the indoor first heat exchanger 1 for continuously cooling, enters the electronic expansion valve for throttling, reducing pressure, changing temperature and low-temperature low-pressure liquid, and then returns to the indoor second heat exchanger 2 to complete a cycle.
Preferably, the first and second electrodes are formed of a metal,
when the dehumidification amount is less than the dehumidification demand, controlling the frequency of the compressor 5 to increase by at least one gear; when the dehumidification amount is larger than the dehumidification requirement, controlling the frequency of the compressor 5 to reduce by at least one gear; and when the dehumidification amount is in a preset numerical range meeting the dehumidification requirement, controlling the frequency of the compressor 5 to be unchanged. The frequency control through the compressor can be according to the dehumidification volume whether the size of control dehumidification volume increases or reduces as required when satisfying the dehumidification demand, realizes the control that the dehumidification volume reaches the dehumidification demand.
Air reheat-dehumidification process
When the system receives a dehumidification signal, a temperature signal detected by the sensor is transmitted to the main chip, the main chip transmits an electric signal after calculation to control the frequency of the compressor 5 and the opening degree of a second throttling device 10 (preferably an electronic expansion valve) so as to control the evaporation temperature of the indoor second heat exchanger 2, outdoor fresh air is cooled to the dew point temperature through the indoor heat exchanger 2 to be subjected to dehumidification treatment, the frequency of the compressor 5 is increased or reduced according to the dehumidification requirement, and when the dehumidification amount is smaller than the dehumidification requirement, the frequency of the compressor 5 is increased by one step; when the dehumidification amount is larger than the dehumidification requirement, the frequency of the compressor 5 is reduced by one gear; when the dehumidification amount satisfies a certain numerical range, the frequency of the compressor 5 is maintained constant.
Preferably, the first and second electrodes are formed of a metal,
a specific control method for controlling the heat dissipation amount of the outdoor heat exchanger 6 by controlling the fan rotation speed of the first outdoor unit fan 7 is shown in fig. 4, and further controls the reheating temperature. Under the operation of a reheating dehumidification mode, if the indoor temperature is lower than the preset temperature, controlling to reduce the rotating speed of the first outer machine fan 7 so as to reduce the heat exchange quantity of the outdoor heat exchanger 6 and increase the heat exchange quantity of the indoor first heat exchanger 1; and if the indoor temperature is higher than the preset temperature, controlling to increase the rotating speed of the first outer fan 7 so as to increase the heat exchange amount of the outdoor heat exchanger 6 and reduce the heat exchange amount of the indoor first heat exchanger 1. This is the utility model discloses a rotational speed according to outdoor heat exchanger's first outer quick-witted fan comes the indoor preferred control mode of heat again, has replaced original adoption effectively and has adjusted the mode of indoor heat exchanger fan, has overcome the current technical problem that leads to the decline of indoor refrigeration comfort level.
After the outdoor air is dehumidified, the temperature is reduced, the cooled air flows through the indoor first heat exchanger 1 to be heated, the fan rotating speed of the first outer fan 7 is controlled, the heat dissipation capacity of the outdoor heat exchanger 6 is controlled, and the specific control method is shown in fig. 4, so that the reheating temperature is controlled. At the moment, the rotating speed of the first outer fan 7 is reduced, the heat dissipation capacity of the outdoor heat exchanger 6 is reduced, the heat dissipation capacity of the indoor first heat exchanger 1 is increased, the reheating capacity of air is increased, the temperature requirement of a user is met, and the electric energy consumption of the outer fan is reduced while the waste heat of the condenser is recovered.
Preferably, the first and second electrodes are formed of a metal,
when the refrigeration system further includes a four-way valve 3, when a cooling operation is required in a room, the four-way valve 3 is controlled such that the outdoor heat exchanger 6 communicates with a discharge end of the compressor 5 and the indoor second heat exchanger 2 communicates with a suction end of the compressor 5 through the four-way valve 3, and the first throttling means 8 is controlled to be opened, and the control valve 9 is controlled to be opened and the second throttling means 10 is controlled to be closed. This is the utility model discloses a preferred control mode and the switching control mode of refrigeration mode can realize carrying out refrigerated effect to indoor, and indoor first heat exchanger and indoor second heat exchanger refrigerate simultaneously this moment, have improved refrigeration effect.
When the working mode is switched from the dehumidification mode to the refrigeration mode, the control valve 9 (preferably, a solenoid valve) in the switching device 13 is opened, the control system controls the opening degree of the first throttling device 8 (electronic expansion valve), the end E of the four-way valve is connected with the end D, and the end S is connected with the end C. The refrigerant absorbs heat by the indoor second heat exchanger 2, enters the gas-liquid separator 4 through the four-way valve, is pressurized, heated and discharged by the compressor 5, enters the outdoor heat exchanger 6 for cooling, enters the first throttling device 8 (preferably an electronic expansion valve) for throttling and depressurizing, enters the indoor first heat exchanger 1 after throttling and depressurizing, absorbs heat for the evaporator by the indoor first heat exchanger 1, and returns to the indoor second heat exchanger 2 to complete a cycle by the flow path where the control valve 9 (preferably an electromagnetic valve) is located due to the opening of the electromagnetic valve, so that the second throttling device 10 (preferably an electronic expansion valve) has no throttling and depressurizing effects, and is specifically shown in fig. 2.
Preferably, the first and second electrodes are formed of a metal,
when the refrigeration system further includes a four-way valve 3, when a heating operation is required in a room, the four-way valve 3 is controlled such that the outdoor heat exchanger 6 communicates with a suction side of the compressor 5, the indoor second heat exchanger 2 communicates with a discharge side of the compressor 5 through the four-way valve 3, and the first throttling means 8 is controlled to be opened, and the control valve 9 is controlled to be opened, and the second throttling means 10 is controlled to be closed. This is the utility model discloses a heating mode's preferred control mode and switching control mode can realize the effect of heating indoor, and indoor first heat exchanger heats simultaneously with indoor second heat exchanger this moment, has improved the heating effect. In the working state of the refrigeration mode converter, the four-way valve is switched to a heating mode by electrifying.
Preferably, the first and second electrodes are formed of a metal,
defining the indoor set temperature as t2, the detected indoor return air temperature as t1, namely the temperature of the indoor return air discharged to the outdoor, defining t real as (t1-t2)/t2, and setting the preset fixed percentage of (t1-t2)/t2 as t; calculating the difference between the set temperature t2 of the user and the return air temperature t1, and setting a fixed percentage t, namely, when the percentage value t is greater than or equal to the set value t in the actual operation
If the delta t is greater than or equal to the t real-t and is greater than or equal to a preset value (preferably 0.04), controlling the first outer machine fan to increase at least one gear of rotating speed to operate; wherein the preset value is a positive number;
when a preset value is less than or equal to delta t ═ tFruit of Chinese wolfberryWhen t is less than a preset value, the original operation state is maintained;
when t is equal to tFruit of Chinese wolfberryAnd when t < -the preset value, controlling the first outer engine fan to reduce the rotation speed of at least one gear to operate.
This is the utility model discloses a rotational speed through the first outer quick-witted fan of control room adjusts indoor preferred control means of heat again, and the condition is that adopt and measure indoor return air temperature t1 as the parameter, compare between with it and preset temperature t2, obtain t2Fruit of Chinese wolfberryAnd t isFruit of Chinese wolfberryComparing the heat quantity of the first outdoor unit fan with the preset fixed percentage of (t1-t2)/t2, wherein the heat quantity of the first outdoor unit fan is increased to be larger than the preset value, which indicates that the indoor return air temperature t1 is higher and does not meet the requirement, and the heat quantity of the outdoor heat exchanger and the heat quantity of the first indoor heat exchanger are both heat-released because the heat quantity of the refrigerant is basically almost equal, so that the heat quantity of the outdoor heat exchanger is increased, the heat quantity of the refrigerant in the first indoor heat exchanger is correspondingly reduced, and the indoor reheating quantity can be effectively reduced, and the return air temperature is finally reduced; Δ t meets the range between [ -preset value, preset value) which indicates that the indoor return air temperature t1 is verified to meet the requirement, and the original operation state is maintained at the moment; when the delta t is smaller than a preset value, the indoor return air temperature t1 is lower and does not meet the requirement, at least one level of outdoor first outer fan is turned down, the heat release of the refrigerant is basically similar, and at the moment, the refrigerant of the outdoor heat exchanger and the refrigerant of the indoor first heat exchanger release heat, so that the heat release of the outdoor heat exchanger is reduced, the heat release of the refrigerant in the indoor first heat exchanger is correspondingly increased, and the indoor reheating quantity can be effectively increased, and the return air temperature can be finally raised.
Preferably, the first and second electrodes are formed of a metal,
detecting air return temperature t1 every N1 minutes in the process of increasing the rotating speed of the first outer machine fan, and if delta t is still greater than or equal to a preset value t-t, controlling the first outer machine fan to operate at a first-gear increasing rotating speed in a reference rotating speed R0 until the delta t is less than the preset value t-t 1, and keeping the current rotating speed of the outer machine fan to operate, wherein N1 is a positive number, and preferably 5 minutes;
in the process of decelerating operation of the first outer machine fan, the return air temperature t1 is detected every N2 minutes, if the delta t is t real-t 1 < -a preset value, the first outer machine fan is controlled to operate at a first-gear descending speed on the reference rotating speed R0, and when the delta t is t real-t 1 is more than or equal to the preset value, the outer machine fan operates at a first-gear ascending speed or a stable rotating speed on the reference rotating speed R0, wherein N2 is a positive number, and preferably 5 minutes.
This is the utility model discloses a control method in further control mode, can realize detecting and controlling the control process of fan rotational speed discontinuously, realize effective accurate control to indoor reheat, completion to indoor temperature's accurate effectual control.
In summer, the humidity of outdoor air is high, the indoor second heat exchanger 2 is used for reducing the temperature of the air to the dew point temperature for dehumidification treatment so as to meet the requirement of indoor humidity, and the treated air is heated to the value required by a user by the indoor first heat exchanger 1. The specific control system is as follows:
the air exchanges heat with the indoor second heat exchanger 2, and the temperature is reduced to the dew point temperature after dehumidification treatment, so that the temperature requirement of a user cannot be met. The air treated by the indoor second heat exchanger 2 enters the indoor first heat exchanger 1 for temperature rise treatment, and the heat dissipation capacity of the outdoor heat exchanger 6 is controlled by controlling the rotating speed of the external fan, so that the heating temperature is controlled by controlling the heat exchange capacity between the indoor first heat exchanger 1 and the entering air.
When the reheating system is in operation, detecting a user set temperature t2 and an air return temperature t1, compiling the data to a main chip, calculating a difference value between the user set temperature t2 and the air return temperature t1, setting a fixed percentage t, namely (t1-t2)/t2, and controlling the air conditioner to carry out the reheating treatment system work flow as shown in fig. 4 when the percentage value t is actually greater than or equal to the set value t in the actual operation;
the implementation mode is as follows:
①, when the outdoor unit receives a dehumidification signal, the outdoor unit enters refrigeration operation, the outdoor unit fan is controlled to be put into operation, when the outdoor unit fan runs for 5 minutes at a reference rotating speed R0, the user set temperature t2 and the air return temperature t1 are detected, if the delta t is t real-t 1 and is not less than 0.04, the outdoor unit fan runs at the first gear of rotating speed, in the process of running at the first gear of rotating speed of the outdoor unit fan, the user set temperature t2 and the air return temperature t1 are detected every 5 minutes, if the delta t is t real-t and is not less than 0.04, the outdoor unit fan runs at the first gear of rotating speed of the reference rotating speed R0 until the delta t is t real-t 1 and is less than 0.04, and the outdoor unit fan keeps running at the current rotating speed;
②, when t is not less than-0.04 and not more than t real-t 1 is less than 0.04, the original running state is kept;
③, when t-t is real-t is less than-0.04, detecting the user set temperature t2 and the return air temperature t1 every 5 minutes, if t-t is real-t 1 is less than-0.04, the outer machine fan operates at the reference rotating speed R0 by reducing the rotating speed of one gear, and when t is real-t 1 is more than or equal to-0.04, the outer machine fan operates at the reference rotating speed R0 by increasing the rotating speed of one gear or stabilizing the rotating speed.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (4)

1. The utility model provides a reheat dehumidification integration refrigerating system which characterized in that: the method comprises the following steps:
the dehumidification system comprises a compressor (5), an outdoor heat exchanger (6), an indoor first heat exchanger (1) and an indoor second heat exchanger (2), wherein the outdoor heat exchanger (6) and a first throttling device (8) are further connected and arranged between the indoor first heat exchanger (1), a first outer fan (7) is arranged at the outdoor heat exchanger (6) and can control dehumidification through the control of the wind speed of the first outer fan (7), and the reheating quantity of the indoor first heat exchanger (1) or the reheating quantity of the indoor second heat exchanger (2) is controlled.
2. The reheat dehumidification integrated refrigerant system as claimed in claim 1, wherein:
a switching device (13) is further connected and arranged between the indoor first heat exchanger (1) and the indoor second heat exchanger (2), wherein the switching device (13) comprises a second throttling device (10) and a control valve (9) which are arranged in parallel.
3. The reheat dehumidification integrated refrigerant system as claimed in claim 1 or 2, wherein:
an indoor unit fan (11) is arranged at the indoor first heat exchanger (1) or the indoor second heat exchanger (2); and/or the air conditioner also comprises an air outlet (14) for exhausting air indoors to outdoors, and a second external fan (12) is arranged in the air outlet.
4. The reheat dehumidification integrated refrigerant system as claimed in any one of claims 1 to 2, wherein:
the indoor heat exchanger is characterized by further comprising a four-way valve (3), wherein the four-way valve (3) comprises four ports, and the four ports are respectively connected with the exhaust port of the compressor, the suction port of the compressor, the indoor second heat exchanger (2) and the outdoor heat exchanger (6).
CN201921210407.1U 2019-07-29 2019-07-29 Reheating and dehumidifying integrated refrigerating system Active CN210374155U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111609589A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN112377986A (en) * 2020-11-11 2021-02-19 海信(山东)空调有限公司 Air conditioner and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111609589A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN112377986A (en) * 2020-11-11 2021-02-19 海信(山东)空调有限公司 Air conditioner and control method thereof

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