CN117516017A - Cold air conditioning device for variable-frequency energy-saving clothes closet - Google Patents
Cold air conditioning device for variable-frequency energy-saving clothes closet Download PDFInfo
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- CN117516017A CN117516017A CN202410022385.5A CN202410022385A CN117516017A CN 117516017 A CN117516017 A CN 117516017A CN 202410022385 A CN202410022385 A CN 202410022385A CN 117516017 A CN117516017 A CN 117516017A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000007710 freezing Methods 0.000 claims abstract description 34
- 230000008014 freezing Effects 0.000 claims abstract description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 39
- 238000005057 refrigeration Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 3
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005094 computer simulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a cold air conditioning device for a variable frequency energy-saving clothes closet, which comprises a condenser, a variable frequency compressor, a liquid storage tank and a control module, wherein an aluminum fin for uniformly radiating is arranged in the condenser, a fan for blowing out heat in the aluminum fin is further arranged on one side of the condenser, and the variable frequency compressor is adopted, so that an ultralow frequency starting technology can be realized, starting current is smaller than running current, pollution of starting current to a power grid is avoided, meanwhile, energy consumption is reduced, the variable frequency compressor can be operated at a high speed when the load of a refrigerator is larger and the temperature is higher, rapid cooling is realized, the variable frequency compressor is operated at a low speed after the temperature in the refrigerator reaches a preset temperature, the starting and stopping times of a machine set are reduced, the temperature change in a refrigerating chamber/a freezing chamber is reduced, and the technical problems of larger temperature fluctuation and larger power consumption in the refrigerator are solved.
Description
Technical Field
The invention belongs to the field of air conditioning, and particularly relates to a cold air conditioning device for a variable-frequency energy-saving clothes closet.
Background
The commercial refrigerated cabinet is mainly used for refrigerating and freezing beverages, quick-frozen foods, food materials and the like, and comprises a cabinet body, a refrigerating system and a control system. Many commercial refrigerators still adopt fixed-frequency air conditioning devices, a common (fixed-frequency) compressor is adopted, the rotating speed of the compressor is basically unchanged, the temperature in the refrigerator is regulated by continuously opening and stopping, and the temperature fluctuation in the refrigerator is easy to be caused between one switch and one switch, and more electric energy is consumed.
In order to automatically provide the required cooling capacity according to the conditions in the refrigerator; when the temperature in the refrigerator reaches the expected value, the host machine runs at a constant speed capable of accurately keeping the temperature, so that 'non-stop running' is realized, the stability of the environment temperature is ensured, the mode can not only cause larger temperature fluctuation in the refrigerator, but also cause larger power consumption of the refrigerator.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art; therefore, the invention provides a variable-frequency energy-saving cold air conditioning device for a clothes closet, which is used for solving the technical problems of larger temperature fluctuation and larger power consumption in the refrigerator.
In order to achieve the above object, a first aspect of the present invention provides a cold air conditioning device for a variable frequency energy-saving clothes closet, which comprises a condenser, a variable frequency compressor, a liquid storage tank and a control module, wherein an aluminum fin for uniformly radiating heat is arranged in the condenser, a fan for blowing out heat in the aluminum fin is further arranged on one side of the condenser, an air inlet pipe and a liquid discharge pipe are respectively arranged above and below one side of the condenser, a liquid outlet end of the liquid discharge pipe is communicated with a liquid inlet end of the liquid storage tank, a refrigerator liquid supply pipe for connecting the evaporator is arranged on an outlet of the liquid storage tank, a gas-liquid separator is arranged on one side of the variable frequency compressor, a gas inlet of the variable frequency compressor is communicated with a gas outlet of the gas-liquid separator, a refrigerator muffler for connecting the evaporator is arranged on the gas-liquid separator, one end of the refrigerator muffler is communicated with one end of the refrigerator liquid supply pipe, and a gas outlet pipe for communicating the liquid inlet pipe is arranged on the variable frequency compressor;
the control module is used for adjusting the refrigerating capacity of the variable frequency compressor according to the temperature in the freezing chamber/the refrigerating chamber;
the control module includes a processing unit, a display connected thereto, and a plurality of temperature sensors disposed within the freezer/refrigerator compartment for acquiring temperatures within the freezer/refrigerator compartment.
As a further scheme of the invention: the processing unit is connected with the inverter through the PWM circuit, the processing unit is powered by 5V direct current, the 220V alternating current power supply end is connected with the inverter through the rectifying and filtering circuit, the temperature sensor sends the acquired temperature to the processing unit, the temperature sensor is in communication/electric connection with the processing unit, and the inverter is used for providing stable power for the variable-frequency compressor;
the refrigerating capacity of the variable frequency compressor is adjusted according to the temperature in the freezing chamber/the refrigerating chamber, and the variable frequency compressor comprises:
the processing unit adjusts the rotating speed of the variable frequency compressor according to the temperature detected by the temperature sensor so as to realize the adjustment of the refrigerating capacity.
As a further scheme of the invention: the control module further comprises a current feedback circuit and a voltage feedback circuit, wherein the current feedback circuit and the voltage feedback circuit are respectively used for collecting current information and voltage information between the inverter and the variable frequency compressor and transmitting the current information and the voltage information to the processing unit.
As a further scheme of the invention: the processing unit adjusts the rotating speed of the variable frequency compressor according to the temperature detected by the temperature sensor, and comprises the following steps:
s1: acquiring temperatures detected by a plurality of temperature sensors, calculating an average value, namely an indoor temperature Tx, and comparing the indoor temperature Tx with a preset temperature value Ty;
s2: when Ty-epsilon < Tx < Ty+epsilon, the processing unit sends a supplementing signal to the variable frequency compressor, and the variable frequency compressor is controlled to keep at a supplementing rotating speed;
s3: when Tx is more than or equal to Ty+epsilon, the processing unit sends an adjusting signal to the variable frequency compressor, the rotating speed of the variable frequency compressor (5) is adjusted, and the temperature in the freezing chamber/the refrigerating chamber is controlled to be reduced to be within Ty+/-0.5 ℃;
s4: when Tx is less than or equal to Ty-epsilon, the processing unit sends a stop signal to the variable frequency compressor, and the variable frequency compressor is controlled to stop running;
where ε is a predetermined error range value.
As a further scheme of the invention: the supplementary rotating speed is the rotating speed at which the variable frequency compressor stably operates when the error between the indoor temperature Tx and the preset temperature Ty is within +/-epsilon ℃, and the supplementary rotating speed of the variable frequency compressor is used for keeping the temperature in the freezing chamber/the refrigerating chamber unchanged so as to keep the temperature in the freezing chamber stable and avoid supercooling or overheating;
as a further scheme of the invention: the method for acquiring the supplementary rotating speed comprises the following steps:
a1: starting the variable frequency compressor, so that the variable frequency compressor is in rated power operation, and reducing the temperature in the freezing chamber/the refrigerating chamber to a preset temperature Ty;
a2: closing the variable frequency compressor, starting timing, and stopping timing when the indoor temperature reaches Ty+epsilon ℃ to obtain refrigerating time;
a3: obtaining refrigerating capacity Q when the indoor temperature is reduced from Ty+epsilon ℃ to Ty based on refrigeration time simulation; calculating a supplementary rotational speed n by the formula n=α×q; wherein alpha is a preset proportionality coefficient greater than 0.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, the compressor adopts the variable frequency compressor, so that the ultralow frequency starting technology can be realized, the starting current is smaller than the running current, the pollution of the starting current to a power grid is avoided, the energy consumption is reduced, the variable frequency compressor can operate at a high speed when the load of the refrigerator is larger and the temperature is higher, the rapid cooling is realized, the variable frequency compressor operates at a low speed after the temperature in the refrigerator reaches the preset temperature, the starting and stopping times of a unit are reduced, the temperature change in a refrigerating chamber/a refrigerating chamber is reduced, the temperature control in the refrigerator is more accurate and stable, the power consumption is reduced, and the waste of electric energy of a user is reduced by the variable frequency energy-saving cold air regulating device for the clothes closet; and the feedback circuit is also arranged, so that current and voltage information can be known in time.
The invention sets the processing unit, obtains the data detected by the temperature sensor through the processing unit, calculates the indoor temperature, adjusts the rotating speed of the variable frequency compressor according to the comparison between the indoor temperature and the preset temperature, thereby controlling the temperature in the refrigerating chamber/freezing chamber, and further solves the problem that the variable frequency compressor causes electric energy waste under the change from the lowest rotating speed to the highest rotating speed in the refrigerating chamber/freezing chamber due to the difference of heat preservation effect caused by different materials of each refrigerating chamber/freezing chamber, and determines the supplementary rotating speed according to the heat preservation condition of each refrigerating chamber/freezing chamber and the difference of the environment, thereby reducing the temperature rising speed in the refrigerating chamber/freezing chamber and more accurately adjusting the rotating speed of the variable frequency compressor suitable for the refrigerating chamber/freezing chamber.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing an external structure of a cold air conditioning apparatus according to the present invention;
FIG. 2 is a schematic diagram of a control module according to the present invention;
FIG. 3 is a logic block diagram of a processing unit according to the present invention.
1. A condenser; 2. an aluminum fin; 3. a blower; 4. an air inlet pipe; 5. a compressor; 6. a gas-liquid separator; 7. an exhaust pipe; 8. a liquid discharge pipe; 9. a liquid storage tank; 10. refrigerator air return pipe; 11. the liquid supply pipe of the refrigerator.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, a first aspect of the present invention provides a cool air conditioning device for a variable frequency energy saving clothes closet, comprising a condenser 1, a variable frequency compressor 5, a liquid storage tank 9 and a control module, wherein an aluminum fin 2 for uniformly radiating heat is arranged in the condenser 1, a fan 3 for blowing out heat in the aluminum fin 2 is also arranged at one side of the condenser 1, an air inlet pipe 4 and a liquid discharge pipe 8 are respectively arranged above and below one side of the condenser 1, a liquid outlet end of the liquid discharge pipe 8 is communicated with a liquid inlet end of the liquid storage tank 9, a refrigerator liquid supply pipe 11 for connecting with an evaporator is arranged on an outlet of the liquid storage tank 9, a gas-liquid separator 6 is arranged at one side of the variable frequency compressor 5, the air inlet of the variable frequency compressor 5 is communicated with the air outlet of the gas-liquid separator 6, the gas-liquid separator 6 is provided with a refrigerator air return pipe 10 used for connecting an evaporator, one end of the refrigerator air return pipe 10 is communicated with one end of a refrigerator liquid supply pipe 11, the variable frequency compressor 5 is provided with an exhaust pipe 7 communicated with an air inlet pipe 4, wherein the condenser 1, the air inlet pipe 4, the variable frequency compressor 5, the gas-liquid separator 6, the exhaust pipe 7, a liquid discharge pipe 8, a liquid storage tank 9, the refrigerator air return pipe 10, the refrigerator liquid supply pipe 11 and the evaporator form a refrigerating pipeline, the condenser 1, the aluminum fins 2 and the fan 3 form a heat dissipation pipeline for heat generated during refrigeration, and the refrigerating chamber/refrigerating chamber is cooled through the refrigerating pipeline and the heat dissipation pipeline;
the control module is used for adjusting the refrigerating capacity of the variable frequency compressor 5 according to the temperature in the freezing chamber/the refrigerating chamber;
the control module comprises a processing unit, a display connected with the processing unit, a plurality of temperature sensors arranged in the freezing chamber/refrigerating chamber, a current feedback circuit and a voltage feedback circuit, wherein the temperature sensors are used for acquiring the temperature in the freezing chamber/refrigerating chamber, the current feedback circuit and the voltage feedback circuit are respectively used for acquiring current information and voltage information between the inverter and the variable frequency compressor 5 and transmitting the current information and the voltage information to the processing unit, and the display is used for displaying the current information, the voltage information and the indoor temperature between the inverter and the variable frequency compressor 5 and can also be used for displaying the model number and related parameters of the variable frequency compressor 5.
Further, the processing unit is connected with the inverter through the PWM circuit, the processing unit is powered by 5V direct current, the 220V alternating current power supply end is connected with the inverter through the rectifying and filtering circuit, the temperature sensor sends the acquired temperature to the processing unit, and the temperature sensor is in communication/electric connection with the processing unit;
further, the refrigerating capacity of the inverter compressor 5 is adjusted according to the temperature in the freezing/refrigerating compartment, including:
the processing unit adjusts the rotation speed of the variable frequency compressor 5 according to the temperature detected by the temperature sensor to realize the adjustment of the refrigerating capacity, wherein the rotation speed of the variable frequency compressor 5 is adjusted to control the pulse width and the pulse frequency through the PWM circuit, so that the rotation speed of the variable frequency compressor 5 is changed.
As a preferred embodiment, the processing unit adjusts the rotation speed of the inverter compressor 5 according to the temperature detected by the temperature sensor, and includes:
the processing unit adjusts the rotation speed of the variable frequency compressor 5 according to the temperature detected by the temperature sensor, and comprises:
s1: acquiring temperatures detected by a plurality of temperature sensors, calculating an average value, namely an indoor temperature Tx, and comparing the indoor temperature Tx with a preset temperature value Ty;
s2: when Ty-0.5< Tx < Ty+0.5, the processing unit sends a supplementary signal to the variable frequency compressor 5, and the variable frequency compressor 5 is controlled to keep at a supplementary rotating speed;
s3: when Tx is more than or equal to Ty+0.5, the processing unit sends an adjusting signal to the variable frequency compressor 5, the rotating speed of the variable frequency compressor 5 is adjusted, and the temperature in the freezing chamber/the refrigerating chamber is controlled to be reduced to be within Ty+/-0.5 ℃;
s4: when Tx is less than or equal to Ty-0.5, the processing unit sends a stop signal to the variable frequency compressor 5, and the variable frequency compressor 5 is controlled to stop running.
Specifically, the supplementary rotational speed is the rotational speed at which the inverter compressor 5 stably operates within ±0.5 ℃ of an error between the indoor temperature Tx and the preset temperature Ty, and the supplementary rotational speed of the inverter compressor 5 is used to keep the temperature in the freezing/refrigerating chamber unchanged.
Further, the method for acquiring the supplementary rotational speed comprises the following steps:
a1: starting the variable frequency compressor 5, so that the variable frequency compressor 5 is in rated power operation, and reducing the temperature in the freezing chamber/refrigerating chamber to a preset temperature Ty;
a2: closing the variable frequency compressor 5, starting timing, and stopping timing when the indoor temperature reaches Ty+0.5deg.C to obtain refrigerating time;
a3: obtaining refrigerating capacity Q when the indoor temperature is reduced from Ty+0.5deg.C to Ty based on refrigerating time simulation; calculating a supplementary rotational speed n by the formula n=α×q;
wherein α is a preset proportionality coefficient greater than 0, so when the value of the refrigerating capacity Q is greater, the value of the supplementary rotational speed is greater, and the α can be obtained by using a computer simulation or modeling tool to obtain a plurality of groups of values of the refrigerating capacity Q and the supplementary rotational speed n according to practical experiments, so as to obtain a specific value of α, for example, when the refrigerating capacity of the inverter compressor 5 in a certain refrigerating time is 2324W, the inverter compressor 5 is kept at a stable rotational speed, and the supplementary rotational speed n when the temperature is reduced from ty+0.5 ℃ to Ty in the refrigerating time is counted to be 500r/min, and at this time, the calculated α= 0.21515r/min·w.
The refrigerating capacity Q when the indoor temperature is reduced from Ty+0.5deg.C to Ty is obtained through simulation, and a refrigerating cycle mathematical model is established; the mathematical model of the refrigeration cycle comprises the flow, phase change, compression and expansion of the refrigerant, and provides initial conditions for the model, wherein the initial conditions comprise the indoor temperature, the pressure and the quality of the refrigerant and the efficiency of the variable frequency compressor 5, a simulation tool is used for simulating the operation process of the refrigeration cycle, the probability of each time point and the refrigeration capacity of the refrigeration cycle, and the total refrigeration capacity Q of the whole refrigeration cycle is calculated by analyzing the simulation result.
The partial data in the formula is obtained by removing dimension and taking the numerical value for calculation, and the formula is obtained by simulating a large amount of acquired data through software and is closest to the real situation; the preset parameters and the preset threshold values in the formula are set by those skilled in the art according to actual conditions or are obtained through mass data simulation.
The working principle of the invention is as follows: the 220V alternating current is subjected to voltage stabilization after being subjected to voltage transformation, rectification and filtering through a rectification and filtering circuit, then the electric energy is converted into electric energy received by a variable frequency compressor through an inverter and is transmitted to the variable frequency compressor, and the temperature in a refrigerating chamber/a freezing chamber is regulated by starting the variable frequency compressor 5 and a fan 3, controlling the rotating speed of the variable frequency compressor according to the indoor temperature;
when the indoor temperature Tx is higher than the preset temperature Ty, controlling the rated rotation speed of the variable frequency compressor 5 at the rated power, and reducing the temperature in the refrigerating chamber/freezing chamber to the preset temperature Ty;
when the indoor temperature Tx is equal to the preset temperature Ty, controlling the variable frequency compressor 5 to be at the supplementary rotating speed, and reducing the heating speed in the refrigerating chamber/freezing chamber;
when the indoor temperature Tx is lower than the preset temperature Ty, it means that the refrigerating/freezing chamber has reached a temperature exceeding the preset temperature Ty due to the influence of the external temperature, and at this time, the inverter compressor 5 is not required to be started to reduce the temperature decrease in the refrigerating/freezing chamber.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (5)
1. The utility model provides a cold air conditioning device for frequency conversion energy-saving clothes closet, includes condenser (1), frequency conversion compressor (5), liquid storage tank (9) and control module, its characterized in that, the inside of condenser (1) is provided with aluminum fin (2) that are used for even radiating, one side of condenser (1) still is provided with fan (3) that are used for blowing out the heat in aluminum fin (2), the top and the below of one side of condenser (1) are provided with intake pipe (4) and fluid-discharge tube (8) respectively, the liquid outlet of fluid-discharge tube (8) is connected with the feed liquor end of liquid storage tank (9), be provided with freezer liquid supply pipe (11) that are used for connecting the evaporimeter on the export of liquid storage tank (9), one side of frequency conversion compressor (5) is provided with gas-liquid separator (6), be provided with on gas separator (6) and be used for connecting the muffler (10) of evaporimeter, the one end of muffler (10) and the last intercommunication of intake pipe (4) of fluid-discharge tube (5);
the control module is used for adjusting the refrigerating capacity of the variable frequency compressor (5) according to the temperature in the freezing chamber/the refrigerating chamber;
the control module comprises a processing unit, a display connected with the processing unit and a plurality of temperature sensors arranged in the freezing chamber/the refrigerating chamber, wherein the temperature sensors are used for acquiring the temperature in the freezing chamber/the refrigerating chamber, and the temperature sensors are arranged in the freezing chamber/the refrigerating chamber at equal intervals;
the processing unit is connected with the inverter through the PWM circuit, the processing unit is powered by 5V direct current, the 220V alternating current power supply end is connected with the inverter through the rectifying and filtering circuit, the temperature sensor sends the acquired temperature to the processing unit, and the temperature sensor is in communication/electric connection with the processing unit;
the refrigerating capacity of the variable frequency compressor (5) is adjusted according to the temperature in the freezing chamber/the refrigerating chamber, and the variable frequency compressor comprises:
the processing unit adjusts the rotating speed of the variable frequency compressor (5) according to the temperature detected by the temperature sensor so as to realize the adjustment of the refrigerating capacity; wherein the rotation speed of the variable frequency compressor (5) is regulated to control the pulse width and the pulse frequency through a PWM circuit, so that the rotation speed of the variable frequency compressor (5) is changed.
2. The cold air conditioning device for a variable frequency energy-saving clothes closet according to claim 1, wherein the control module further comprises a current feedback circuit and a voltage feedback circuit, and the current feedback circuit and the voltage feedback circuit are respectively used for collecting current information and voltage information between the inverter and the variable frequency compressor (5) and transmitting the current information and the voltage information to the processing unit.
3. The cold air conditioning device for a variable frequency energy saving clothes closet according to claim 1, wherein the processing unit adjusts the rotation speed of the variable frequency compressor (5) according to the temperature detected by the temperature sensor, and comprises:
s1: acquiring temperatures detected by a plurality of temperature sensors, calculating an average value, namely an indoor temperature Tx, and comparing the indoor temperature Tx with a preset temperature value Ty;
s2: when Ty-epsilon < Tx < Ty+epsilon, the processing unit sends a supplementing signal to the variable frequency compressor (5), and the variable frequency compressor (5) is controlled to keep at the supplementing rotating speed; wherein epsilon is a preset error range value;
s3: when Tx is more than or equal to Ty+epsilon, the processing unit sends an adjusting signal to the variable frequency compressor (5), the rotating speed of the variable frequency compressor (5) is adjusted, and the temperature in the freezing chamber/the refrigerating chamber is controlled to be reduced to be within Ty+/-epsilon ℃;
s4: when Tx is less than or equal to Ty-epsilon, the processing unit sends a stop signal to the variable frequency compressor (5) at the moment, and the variable frequency compressor (5) is controlled to stop running.
4. A cold air conditioning device for a variable frequency energy saving clothes closet according to claim 3, characterized in that the supplementary rotational speed is a rotational speed at which the variable frequency compressor (5) operates, the supplementary rotational speed of the variable frequency compressor (5) being used to keep the temperature in the freezing/refrigerating room unchanged, the error between the indoor temperature Tx and the preset temperature Ty being within ± epsilon ℃.
5. The cold air conditioning device for a variable frequency energy-saving clothes closet according to claim 4, wherein the method for obtaining the supplementary rotational speed is as follows:
a1: starting the variable frequency compressor (5) so that the variable frequency compressor (5) is in rated power operation, and reducing the temperature in the freezing chamber/refrigerating chamber to a preset temperature Ty;
a2: closing the variable frequency compressor (5), starting timing, and stopping timing when the indoor temperature reaches Ty+epsilon ℃ to obtain refrigerating time;
a3: obtaining refrigerating capacity Q when the indoor temperature is reduced from Ty+epsilon ℃ to Ty based on refrigeration time simulation; calculating a supplementary rotational speed n by the formula n=α×q; wherein alpha is a preset proportionality coefficient greater than 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410022385.5A CN117516017A (en) | 2024-01-08 | 2024-01-08 | Cold air conditioning device for variable-frequency energy-saving clothes closet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410022385.5A CN117516017A (en) | 2024-01-08 | 2024-01-08 | Cold air conditioning device for variable-frequency energy-saving clothes closet |
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| CN117516017A true CN117516017A (en) | 2024-02-06 |
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| CN202410022385.5A Pending CN117516017A (en) | 2024-01-08 | 2024-01-08 | Cold air conditioning device for variable-frequency energy-saving clothes closet |
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| CN102620519A (en) * | 2012-04-13 | 2012-08-01 | 四川长虹空调有限公司 | Temperature precision control method for frequency conversion refrigerator |
| CN106766512A (en) * | 2016-12-03 | 2017-05-31 | 广东奥马冰箱有限公司 | Refrigerator continuously runs conversion method |
| CN107490241A (en) * | 2017-08-15 | 2017-12-19 | 南京创维家用电器有限公司 | A kind of control method of frequency conversion refrigerator, storage medium and refrigerator |
| CN107906828A (en) * | 2017-09-30 | 2018-04-13 | 天津九鼎医学生物工程有限公司 | A kind of novel intelligent refrigerator |
| CN109764629A (en) * | 2018-12-11 | 2019-05-17 | 青岛海尔股份有限公司 | The control method of frequency conversion refrigerator and frequency conversion refrigerator |
| CN113865257A (en) * | 2021-10-11 | 2021-12-31 | 珠海格力电器股份有限公司 | Refrigerator control method, device and system and refrigerator |
| CN217876686U (en) * | 2022-07-15 | 2022-11-22 | 郑州凯雪冷链股份有限公司 | Condenser for commercial refrigerator |
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