CN113324362A - Refrigeration equipment and method for determining refrigerant charge - Google Patents
Refrigeration equipment and method for determining refrigerant charge Download PDFInfo
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- CN113324362A CN113324362A CN202010088836.7A CN202010088836A CN113324362A CN 113324362 A CN113324362 A CN 113324362A CN 202010088836 A CN202010088836 A CN 202010088836A CN 113324362 A CN113324362 A CN 113324362A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 352
- 238000005057 refrigeration Methods 0.000 title claims abstract description 190
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 46
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical group CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims description 40
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical group CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 36
- 239000001282 iso-butane Substances 0.000 claims description 20
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical group CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 18
- 239000001294 propane Substances 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 abstract description 41
- 230000008020 evaporation Effects 0.000 abstract description 36
- 238000007710 freezing Methods 0.000 description 41
- 230000008014 freezing Effects 0.000 description 41
- 239000000243 solution Substances 0.000 description 13
- 238000005265 energy consumption Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
-
- 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
- F25B45/00—Arrangements for charging or discharging refrigerant
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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
-
- 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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/045—Air flow control arrangements
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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
- F25D19/003—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
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- 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)
Abstract
The invention provides a refrigeration device and a method for determining the refrigerant charging amount, wherein the refrigeration device comprises: the box body is provided with a storage chamber; refrigerating system, the refrigerant that refrigerating system fills is mixed refrigerant, and mixed refrigerant includes at least: a first refrigerant and a second refrigerant; wherein the charge amount of the first refrigerant or the second refrigerant is determined according to the volume of the storage compartment and the target cooling temperature of the storage compartment. The invention fills at least two different refrigerants in the refrigerating system, and utilizes the different refrigerants to have different evaporation temperatures, thereby realizing different refrigerating temperatures. The filling amounts of different refrigerants are determined according to the volume of the storage chamber and the target refrigeration temperature of the storage chamber, so that the filling amount of the refrigerant required by the refrigeration requirement of the storage chamber is ensured, and the refrigeration efficiency is improved.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to refrigeration equipment and a method for determining refrigerant filling amount.
Background
With the subdivision of the temperature zone and the continuous expansion of the temperature adjusting range, the concept of low-temperature quick freezing and low-temperature storage is increasingly required. In order to realize the function of low-temperature freezing, the prior art realizes low-temperature freezing by changing a refrigerant to enable a compartment to reach a lower evaporation temperature, and the lower evaporation temperature is known according to a reverse Carnot thermal efficiency calculation formula to cause the reduction of the refrigeration efficiency of a refrigerating chamber or a freezing chamber.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a refrigeration device.
The second aspect of the present invention provides a method for determining a refrigerant charge amount.
In view of this, a first aspect of the present invention provides a refrigeration apparatus comprising: the box body is provided with a storage chamber; refrigerating system, the refrigerant that refrigerating system fills is mixed refrigerant, and mixed refrigerant includes at least: a first refrigerant and a second refrigerant; wherein the charge amount of the first refrigerant or the second refrigerant is determined according to the volume of the storage compartment and the target cooling temperature of the storage compartment.
The refrigeration equipment provided by the invention comprises a box body and a refrigeration system, wherein a storage space for storing food is arranged in the box body, and the refrigeration system is used for refrigerating the storage space; furthermore, the refrigerant that fills in the refrigerating system is mixed refrigerant, and mixed refrigerant includes first refrigerant and second refrigerant at least, through filling at least two kinds of different refrigerants in refrigerating system, utilizes different refrigerants to have different evaporating temperatures, and then can realize different refrigeration temperature, and then has expanded refrigeration plant's service function to promote user's use and experience. Further, to the injection volume of first refrigerant and second refrigerant, this application is confirmed according to the target refrigeration temperature that the volume of storage compartment and storage compartment will reach, and then has realized satisfying the demand of target refrigeration temperature in the injection volume of the required refrigerant of the refrigeration demand of guaranteeing storage compartment, promotes refrigeration efficiency.
The mixed refrigerant is filled in the refrigerating system, so that lower evaporation temperature can be obtained in the refrigerating process, and low-temperature refrigeration is realized. The mixed refrigerant at least comprises a first refrigerant and a second refrigerant, so that a plurality of refrigerants are mixed, the refrigerating system can realize at least two refrigerating temperatures, can be switched between the two refrigerating temperatures according to actual needs to meet different refrigerating requirements of users, and reduces energy consumption in the operation process of the refrigerating system.
In addition, according to the refrigeration equipment in the above technical solution provided by the present invention, the refrigeration equipment may further have the following additional technical features:
in the above technical solution, further, the refrigeration system further includes: the compressor is provided with an exhaust port and an air return port, and mixed refrigerant is filled in the compressor; the inlet end of the condenser is communicated with the exhaust port; a first evaporator, an inlet end of the first evaporator being in communication with an outlet end of the condenser, the first evaporator being configured and adapted to refrigerate the storage compartment; the inlet end of the second evaporator is communicated with the outlet end of the first evaporator, and the outlet end of the second evaporator is communicated with the air return port; the inlet of the valve body is communicated with the outlet end of the condenser, the first outlet of the valve body is communicated with the inlet end of the first evaporator, and the second outlet of the valve body is communicated with the inlet end of the second evaporator; the two ends of the first throttling element are respectively communicated with the second outlet of the valve body and the inlet end of the second evaporator; wherein the valve body is configured to be suitable for switching the flow direction of the mixed refrigerant.
In this technical solution, the refrigeration system provided by the present invention further includes: the compressor, the condenser, the first evaporator, the second evaporator, the first throttling element and the valve body. Specifically, the mixed refrigerant is compressed in a compressor, the pressure and temperature of the refrigerant are increased, and the refrigerant enters the refrigeration system through an exhaust port. One end of the condenser is communicated with the exhaust port, so that the heat of the high-temperature and high-pressure refrigerant gas sent by the compressor is radiated to the external space through the action of the condenser. The refrigerant is liquefied after heat dissipation and cooling to form high-pressure and normal-temperature refrigerant liquid. One end of the first evaporator is communicated with the other end of the condenser and is used for absorbing heat in the evaporation of the first refrigerant. One end of the second evaporator is communicated with the other end of the first evaporator, and the other end of the second evaporator is communicated with the air return port, so that the flow of the mixed refrigerant can form two independent loops. One circuit can enable the mixed refrigerant to pass through only the second evaporator, and the other circuit can enable the mixed refrigerant to pass through both the first evaporator and the second evaporator, so that the use requirements of users are met. The second evaporator is in circuit for absorbing heat from the evaporation of the second refrigerant. Two ends of the first throttling element are respectively communicated with the other end of the condenser and one end of the second evaporator, and the flow and the pressure of the refrigerant entering the second evaporator can be regulated through the first throttling element. The inlet of the valve body is communicated with the other end of the condenser, the first outlet of the valve body is communicated with one end of the first evaporator, and the second outlet of the valve body is communicated with the first throttling element. Through the setting of valve body, can adjust the state that different return circuits switched on and closed to change the flow direction of mixed refrigerant.
In any of the above technical solutions, further, the refrigeration system further includes: the two ends of the second throttling element are respectively communicated with the first outlet of the valve body and the inlet end of the first evaporator; the valve body is an electric valve.
In the technical scheme, two ends of the second throttling element are respectively communicated with the first outlet of the valve body and one end of the first evaporator, and the flow and the pressure of the refrigerant entering the first evaporator can be adjusted through the second throttling element. The electric valve is used as a valve body, so that the control of the conduction and the stop of the refrigeration loop is more convenient and efficient.
In any of the above technical solutions, further, the box further includes: a first compartment; the refrigeration system is arranged in the heat exchange cavity; an air inlet of the air outlet duct is communicated with the heat exchange cavity, and a first air outlet of the air outlet duct is communicated with the first compartment; and the first air return port of the air return duct is communicated with the first chamber, and the air outlet of the air return duct is communicated with the heat exchange cavity.
In the technical scheme, the box body comprises a first chamber, a heat exchange cavity, an air outlet duct and an air return duct. First room and storage room have constituted refrigeration plant's storage space, can satisfy the user to the demand of different temperature setting functions through setting up first room and storage room to promote user's use and experience. The heat exchange cavity is formed to provide an installation position for a refrigerating system, and through the arrangement of the air inlet duct and the air return duct, air supply refrigeration circulation can be formed, so that refrigeration is carried out on the first chamber.
In any of the above technical solutions, further, the box further includes: the second air outlet of the air outlet duct is communicated with the second compartment, and the second return air inlet of the return air duct is communicated with the second compartment; and the air door is arranged on the air outlet duct and is positioned between the air inlet and the second air outlet.
In this technical scheme, the box has included storage compartment, first compartment and second compartment, and first evaporimeter refrigerates for storing, and first compartment and second compartment refrigerate through communicating in air-out wind channel. The first evaporator is configured to refrigerate the storage chamber, so that the storage chamber can be ensured to have enough cold quantity, furthermore, the refrigeration mode of the first evaporator can be flexibly set, and the first evaporator can refrigerate the storage chamber in a direct cooling or air cooling mode; the cold energy generated by the second evaporator can enter the first chamber through the first air outlet of the air outlet duct under the driving of the fan, the air supply circulates in the first chamber to refrigerate the first chamber, the air supply can enter the air return duct through the first air return opening after circulating in the first chamber, and then returns to the second evaporator through the air return duct, so that the circulation of the air in the first chamber can be realized.
Furthermore, a second air outlet and a second air return inlet are arranged on the second chamber. The second compartment provides a plurality of storage spaces for the refrigeration equipment through combination with the storage compartment and the first compartment, so that the refrigeration equipment meets different requirements of users. One of the first compartment and the second compartment is a refrigerating compartment, the other one is a freezing compartment, the refrigerating temperature of the refrigerating compartment is higher than that of the freezing compartment, and the storage compartment is independently refrigerated by the first evaporator and can be a deep cooling compartment with the lowest refrigerating temperature.
Taking the first compartment as a freezing compartment and the second compartment as a refrigerating compartment as an example, the cooling capacity generated by the refrigerating system enters the first compartment through the air outlet duct and the first air inlet by the fan, and returns to the air return duct through the first air return opening after circulating refrigeration is performed in the first compartment. So set up, the cold volume air supply firstly passes through first compartment and refrigerates for the freezer that requires the higher to the refrigeration temperature, then gets into the second compartment and refrigerates for the walk-in that requires the lower to the refrigeration temperature again, can improve the utilization ratio of refrigerating system cold volume, and then improves air conditioner refrigeration efficiency. On the contrary, if the second compartment is a freezing compartment and the first compartment is a refrigerating compartment, the cold energy generated by the refrigerating system is firstly transmitted to the second compartment and then transmitted to the first compartment. Further, in consideration of the fact that the refrigerating chamber does not need to be continuously cooled, a damper for opening or closing the second air outlet is provided.
The second aspect of the present invention provides a method for determining a refrigerant charge amount, which is used for a refrigeration device, where the refrigeration device includes a refrigeration system and a storage chamber, a refrigerant charged in the refrigeration system is a mixed refrigerant, and the mixed refrigerant at least includes: a first refrigerant and a second refrigerant; the method for determining the refrigerant charge amount comprises the following steps: acquiring the volume of the storage chamber and the target refrigerating temperature of the storage chamber; a charge of the first refrigerant or the second refrigerant is determined based on the volume and the target refrigeration temperature.
The method for determining the refrigerant charging amount determines the charging amount of the first refrigerant or the second refrigerant according to the acquired volume of the storage chamber and the target refrigerating temperature of the storage chamber, so that the charging amount of the mixed refrigerant is determined according to the volume of the storage chamber and the required temperature, and the refrigerating requirements of different storage chambers are met.
Specifically, the target refrigeration temperature and volume of the storage compartment affect the proportion of different refrigerants in the mixed refrigerant in the refrigeration system. The target refrigeration temperature is the refrigeration temperature required to be reached by the storage chamber, and the mixed refrigerant at least comprises two refrigerants. The method comprises the steps of obtaining the volume of a storage chamber and the target refrigerating temperature of the storage chamber, and determining the charging amount of a first refrigerant or a second refrigerant, namely determining the charging amount of a mixed refrigerant according to the refrigerating requirement of the storage chamber.
In addition, according to the refrigeration equipment in the above technical solution provided by the present invention, the refrigeration equipment may further have the following additional technical features:
in the above technical solution, further, the step of determining the charge amount of the first refrigerant or the second refrigerant according to the volume and the target cooling temperature specifically includes: based on the condition that the target refrigeration temperature is less than the first temperature threshold and greater than or equal to the second temperature threshold, the ratio of the charging amount to the volume of the first refrigerant or the second refrigerant is less than or equal to 1/4 and greater than or equal to 1/7; wherein the first temperature threshold is greater than the second temperature threshold.
In this embodiment, the unit of the first refrigerant or the second refrigerant is set to gram, the unit of the volume of the storage compartment is set to liter, and the first temperature threshold is greater than the second temperature threshold. And according to the volume of the storage compartment and the target refrigeration temperature, when the target refrigeration temperature is less than a first temperature threshold and is greater than or equal to a second temperature threshold, the ratio of the charging amount of the first refrigerant or the second refrigerant to the volume is less than or equal to 1/4 and is greater than or equal to 1/7. Thus, the charging amount of the first refrigerant or the second refrigerant is determined within the refrigeration temperature range defined by the first temperature threshold and the second temperature threshold so as to meet the refrigeration requirement within the temperature range.
In any of the above technical solutions, further, the step of determining the charge amount of the first refrigerant or the second refrigerant according to the volume and the target cooling temperature specifically includes: based on the target refrigeration temperature being less than the second temperature threshold and equal to or greater than the third temperature threshold, the ratio of the charge amount to the volume of the first refrigerant or the second refrigerant is equal to or less than 1/4 and equal to or greater than 1/6; wherein the second temperature threshold is greater than the third temperature threshold.
In this embodiment, the unit of the first refrigerant or the second refrigerant is set to gram, the unit of the volume of the storage compartment is set to liter, and the second temperature threshold is greater than the third temperature threshold. And according to the volume and the target refrigeration temperature, when the target refrigeration temperature is less than the second temperature threshold and is greater than or equal to the third temperature threshold, the ratio of the charging amount of the first refrigerant or the second refrigerant to the volume is less than or equal to 1/4 and is greater than or equal to 1/6. Thus, the charging amount of the first refrigerant or the second refrigerant is determined in the refrigeration temperature range defined by the second temperature threshold and the third temperature threshold, so as to meet the refrigeration requirement in the temperature range.
In any of the above technical solutions, further, the step of determining the charge amount of the first refrigerant or the second refrigerant according to the volume and the target cooling temperature specifically includes: the first refrigerant or the second refrigerant is charged in an amount of 0 g based on the case where the volume is 0 l or the target cooling temperature is equal to or higher than the first temperature threshold value.
In this solution, the storage compartment is not present when the volume of the storage compartment is 0 litres. In the case where the target cooling temperature is equal to or greater than the first temperature threshold value, the cooling apparatus does not require a lower cooling temperature. In both cases, the charge amount of the first refrigerant or the second refrigerant is 0 g, i.e. the refrigerant in the refrigeration system is now only a single refrigerant.
In any of the above technical solutions, further, the first temperature threshold is-25 ℃, the second temperature threshold is-35 ℃, and the third temperature threshold is-45 ℃.
In the technical scheme, according to the actual use requirements of users and the self characteristics of the refrigerant, the first temperature threshold is further limited to be-25 ℃, the second temperature threshold is-35 ℃, and the third temperature threshold is further limited to be-45 ℃ so as to adapt to the use requirements of the users.
In any of the above technical solutions, further, the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant and the second refrigerant is isobutane refrigerant.
In the technical scheme, the types of a first refrigerant and a second refrigerant are further provided, wherein the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant and the second refrigerant is isobutane refrigerant. The evaporation temperature of the ethane refrigerant and the propane refrigerant is lower than that of the isobutane refrigerant, the evaporation temperature of the ethane refrigerant and the evaporation temperature of the propane refrigerant are lower, the refrigeration effect of the refrigeration system can be improved through selection of the evaporation temperatures of the ethane refrigerant and the propane refrigerant, the refrigeration efficiency of the refrigeration system can be improved through selection of the isobutane refrigerant, and energy consumption is reduced.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a refrigeration apparatus according to an embodiment of the first aspect of the present invention, in which hollow arrows indicate the flow direction of air;
FIG. 2 is a schematic block diagram of a refrigeration system according to an embodiment of the first aspect of the present invention;
fig. 3 is a flowchart of a method for determining a refrigerant charge according to an embodiment of the second aspect of the present invention;
fig. 4 is a flowchart of a method for determining a refrigerant charge amount according to still another embodiment of the second aspect of the present invention;
fig. 5 is a flowchart illustrating a method for determining a refrigerant charge amount according to another embodiment of the second aspect of the present invention;
fig. 6 is a flowchart illustrating a method for determining a refrigerant charge amount according to another embodiment of the second aspect of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
1 refrigeration equipment, 10 refrigeration system, 100 storage compartment, 102 first compartment, 1022 first air outlet, 1024 first air return inlet, 104 second compartment, 1042 second air outlet, 1044 second air return inlet, 106 air door, 200 compressor, 300 condenser, 400 first evaporator, 500 second evaporator, 600 valve body, 700 first throttling element, 800 second throttling element, 900 fan, 1002 heat exchange cavity, 1004 air outlet duct, 1006 air return duct.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A method for determining a refrigerant charge and a refrigeration apparatus 1 according to some embodiments of the present invention will be described with reference to fig. 1 to 6.
Example one
As shown in fig. 1 and 2, an embodiment of the present invention provides a refrigeration apparatus 1 including: a cabinet and a refrigeration system 10.
Wherein the box body is provided with a storage compartment 100; the refrigerant filled in the refrigeration system 10 is a mixed refrigerant, and the mixed refrigerant at least includes: the refrigerant temperature control device comprises a first refrigerant and a second refrigerant, and the charging amount of the first refrigerant or the second refrigerant is determined according to the volume of a storage chamber and the target refrigeration temperature of the storage chamber.
The refrigeration equipment 1 provided by the invention comprises a box body and a refrigeration system 10, wherein a storage space for storing food is arranged in the box body, and the refrigeration system 10 is used for refrigerating the storage space; further, the refrigerant that fills in refrigerating system 10 is mixed refrigerant, and mixed refrigerant includes first refrigerant and second refrigerant at least, through filling at least two kinds of different refrigerants in refrigerating system 10, utilizes different refrigerants to have different evaporating temperature, and then can realize different refrigeration temperature, and then has expanded the service function of refrigeration plant 1 to promote user's use and experience. Further, to the charge of first refrigerant and second refrigerant, this application is confirmed according to the target refrigeration temperature that the volume of storage compartment 100 and storage compartment 100 will reach, and then has realized satisfying the demand of target refrigeration temperature in the charge of the required refrigerant of the refrigeration demand of guaranteeing storage compartment 100, promotes refrigeration efficiency.
The mixed refrigerant is filled in the refrigerating system 10, so that lower evaporation temperature can be obtained in the refrigerating process, and low-temperature refrigeration is realized. The mixed refrigerant at least comprises a first refrigerant and a second refrigerant, so that a plurality of refrigerants are mixed, the refrigerating system 10 can realize at least two refrigerating temperatures, and can be switched between the two refrigerating temperatures according to actual needs so as to meet different refrigerating requirements of users, and the energy consumption is reduced in the operation process of the refrigerating system 10.
Example two
As shown in fig. 1 and 2, an embodiment of the present invention provides a refrigeration apparatus 1 including: a cabinet and a refrigeration system 10. Wherein the box body is provided with a storage compartment 100; the refrigerant filled in the refrigeration system 10 is a mixed refrigerant, and the mixed refrigerant at least includes: a first refrigerant and a second refrigerant.
Further, as shown in fig. 2, the refrigeration system 10 further includes: the compressor 200, the compressor 200 has air exhaust and return air inlet, the compressor 200 is filled with the mixed refrigerant; the inlet end of the condenser 300 is communicated with the exhaust port; a first evaporator 400, an inlet end of the first evaporator 400 communicating with an outlet end of the condenser 300, the first evaporator 400 being configured to refrigerate the storage compartment 100; a second evaporator 500, an inlet end of the second evaporator 500 being communicated with an outlet end of the first evaporator 400, an outlet end of the second evaporator 500 being communicated with an air return opening; a valve body 600, an inlet of the valve body 600 being communicated with an outlet end of the condenser 300, a first outlet of the valve body 600 being communicated with an inlet end of the first evaporator 400, a second outlet of the valve body 600 being communicated with an inlet end of the second evaporator 500; a first throttling element 700, both ends of the first throttling element 700 being respectively communicated with the second outlet of the valve body 600 and the inlet end of the second evaporator 500; wherein the valve body 600 is configured to be suitable for switching the flow direction of the mixed refrigerant.
The present invention provides a refrigeration system 10 further comprising: a compressor 200, a condenser 300, a first evaporator 400, a second evaporator 500, a first throttling element, and a valve body 600. Specifically, the mixed refrigerant is compressed in the compressor 200, the pressure and temperature of the refrigerant are increased, and the refrigerant is introduced into the refrigeration system 10 through the discharge port. One end of the condenser 300 is communicated with the discharge port, so that heat of the high-temperature and high-pressure refrigerant gas sent from the compressor 200 is radiated to the external space by the condenser 300. The refrigerant is liquefied after heat dissipation and cooling to form high-pressure and normal-temperature refrigerant liquid. One end of the first evaporator 400 communicates with the other end of the condenser 300 for absorbing heat by evaporation of the first refrigerant. One end of the second evaporator 500 communicates with the other end of the first evaporator 400, and the other end of the second evaporator 500 communicates with the return port, so that the flow of the mixed refrigerant can be formed into two independent circuits. One circuit may pass the mixed refrigerant only through the second evaporator 500 and one circuit may pass the mixed refrigerant through both the first evaporator 400 and the second evaporator 500, thereby satisfying the user's use requirement. The second evaporator 500 is in circuit for absorbing heat for evaporation of the second refrigerant. Both ends of the first throttling element are respectively communicated with the other end of the condenser 300 and one end of the second evaporator 500, and the flow rate and pressure of the refrigerant entering the second evaporator 500 can be regulated by the first throttling element. An inlet of the valve body 600 communicates with the other end of the condenser 300, a first outlet of the valve body 600 communicates with one end of the first evaporator 400, and a second outlet of the valve body 600 communicates with the first throttling element. Through the setting of valve body 600, can adjust the state that different return circuits switched on and closed to change the flow direction of mixed refrigerant.
Further, the refrigeration system 10 further includes: a second throttling element 800, both ends of the second throttling element 800 being respectively communicated with the first outlet of the valve body 600 and one end of the first evaporator 400, the flow rate and pressure of the refrigerant entering the first evaporator 400 being adjustable by the second throttling element 800; the electric valve is adopted as the valve body 600, so that the control of the conduction and the stop of the refrigeration loop is more convenient and efficient.
Further, as shown in fig. 1, the box further includes a first compartment 102, a heat exchange cavity 1002, an air outlet duct 1004, and an air return duct 1006. The refrigeration system 10 is arranged in the heat exchange cavity 1002; an air inlet of the air outlet duct 1004 is communicated with the heat exchange cavity 1002, and a first air outlet 1022 of the air outlet duct 1004 is communicated with the first compartment 102; a first air return opening 1024 of the air return duct 1006 is communicated with the first compartment 102, and an air outlet of the air return duct 1006 is communicated with the heat exchange cavity 1002. The first compartment 102 and the storage compartment 100 constitute a storage space of the refrigeration apparatus 1, and the requirements of users on different temperature setting functions can be met by arranging the first compartment 102 and the storage compartment 100, so that the use experience of the users is improved. The formation of heat exchange cavity 1002 provides the installation location for refrigeration system 10, and through the arrangement of air inlet duct and air return duct 1006, the circulation of air supply refrigeration can be formed, thereby refrigerating first compartment 102.
EXAMPLE III
On the basis of any of the above embodiments, as shown in fig. 1, the box further includes: a second air outlet 1042 of the air outlet duct 1004 is communicated with the second compartment 104, and a second return air inlet 1044 of a return air inlet of the return air duct 1006 is communicated with the second compartment 104; the air door 106 is disposed on the air outlet duct 1004 and located between the air inlet and the second air outlet 1042.
In this embodiment, the cabinet includes a storage compartment 100, a first compartment 102, and a second compartment 104, the first evaporator 400 performs cooling for storage, and the first compartment 102 and the second compartment 104 perform cooling by communicating with an air outlet duct 1004. The first evaporator 400 is configured to refrigerate the storage compartment 100, so that the storage compartment 100 can have sufficient cooling capacity, and further, the refrigeration mode of the first evaporator 400 can be flexibly set, and the first evaporator 400 can refrigerate the storage compartment 100 in a direct cooling or air cooling mode; the cold energy generated by the second evaporator 500 can enter the first compartment 102 through the first air outlet 1022 of the air outlet duct 1004 under the driving of the fan 900, the air supply circulates in the first compartment 102 to refrigerate the first compartment 102, the air supply can enter the air return duct 1006 through the first air return opening 1024 after circulating in the first compartment 102, and then returns to the second evaporator 500 through the air return duct 1006, so that the circulation of the air in the first compartment 102 can be realized.
Further, a second air outlet 1042 and a second air return 1044 are disposed on the second compartment 104. The second compartment 104 provides the refrigeration device 1 with a plurality of storage spaces by combining with the storage compartment 100 and the first compartment 102, so that the refrigeration device 1 can meet different requirements of users. One of the first compartment 102 and the second compartment 104 is a refrigerating compartment and the other is a freezing compartment, and the refrigerating compartment has a refrigerating temperature higher than that of the freezing compartment, and may be a deep cooling compartment having the lowest refrigerating temperature since the storage compartment 100 is independently refrigerated by the first evaporator 400.
Specifically, taking the first compartment 102 as a freezing compartment and the second compartment 104 as a refrigerating compartment as an example, the cooling energy generated by the refrigeration system 10 enters the first compartment 102 through the air outlet duct 1004 and the first air inlet by the fan 900, and returns to the air return duct 1006 through the first air return opening 1024 after the first compartment 102 is subjected to circulating refrigeration, at this time, the temperature of the air supplied by the fan 900 is increased due to the completion of the refrigeration of the first compartment 102, and under the condition that the refrigerating compartment needs to be refrigerated, the fan 900 sends the air with the increased temperature to the second compartment 104 through the air outlet duct 1004 and the second air outlet 1042, and the air returns to the air return duct 1006 through the second air return opening 1044 after the air is circulated in the second compartment 104. With the arrangement, cold air is firstly cooled by the freezing chamber with higher requirement on the cooling temperature through the first compartment 102, then enters the second compartment 104 and is cooled by the refrigerating chamber with lower requirement on the cooling temperature, so that the utilization rate of the cold of the refrigerating system 10 can be improved, and the refrigerating efficiency of the air conditioner is further improved. On the contrary, if the second compartment 104 is a freezing compartment and the first compartment 102 is a refrigerating compartment, the cooling energy generated by the refrigeration system 10 is firstly transmitted to the second compartment 104 and then transmitted to the first compartment 102. Further, in consideration that the refrigerating compartment does not need to be continuously cooled, a damper 106 for opening or closing the second air outlet 1042 is provided.
Example four
One embodiment of the present invention provides a method for determining a refrigerant charge amount, which is used for a refrigeration device, where the refrigeration device includes a refrigeration system and a storage chamber, a refrigerant charged in the refrigeration system is a mixed refrigerant, and the mixed refrigerant at least includes: a first refrigerant and a second refrigerant; as shown in fig. 3, the method for determining the refrigerant charge amount includes:
1102, acquiring the volume of a storage chamber and a target refrigerating temperature of the storage chamber;
based on the volume and the target refrigeration temperature, a charge of the first refrigerant or the second refrigerant is determined 1104.
The method for determining the refrigerant charging amount determines the charging amount of the first refrigerant or the second refrigerant according to the acquired volume of the storage chamber and the target refrigerating temperature of the storage chamber, so that the charging amount of the mixed refrigerant is determined according to the volume of the storage chamber and the required temperature, and the refrigerating requirements of different storage chambers are met.
Specifically, the target refrigeration temperature and volume of the storage compartment affect the proportion of different refrigerants in the mixed refrigerant in the refrigeration system. The target refrigeration temperature is the refrigeration temperature required to be reached by the storage chamber, and the mixed refrigerant at least comprises two refrigerants. The method comprises the steps of obtaining the volume of a storage chamber and the target refrigerating temperature of the storage chamber, and determining the charging amount of a first refrigerant or a second refrigerant, namely determining the charging amount of a mixed refrigerant according to the refrigerating requirement of the storage chamber.
EXAMPLE five
One embodiment of the present invention provides a method for determining a refrigerant charge amount, which is used for a refrigeration device, where the refrigeration device includes a refrigeration system and a storage chamber, a refrigerant charged in the refrigeration system is a mixed refrigerant, and the mixed refrigerant at least includes: a first refrigerant and a second refrigerant; as shown in fig. 4, the method for determining the refrigerant charge amount includes:
step 1202, acquiring the volume of a storage chamber and a target refrigerating temperature of the storage chamber;
a step 1204 of, based on the target cooling temperature being less than the first temperature threshold and equal to or greater than the second temperature threshold, determining that a ratio of a charge amount to a volume of the first refrigerant or the second refrigerant is equal to or less than 1/4 and equal to or greater than 1/7; wherein the first temperature threshold is greater than the second temperature threshold.
In this embodiment, the unit of the first refrigerant or the second refrigerant is set to gram, the unit of the volume of the storage compartment is set to liter, and the first temperature threshold is greater than the second temperature threshold. And according to the volume of the storage compartment and the target refrigeration temperature, when the target refrigeration temperature is less than a first temperature threshold and is greater than or equal to a second temperature threshold, the ratio of the charging amount of the first refrigerant or the second refrigerant to the volume is less than or equal to 1/4 and is greater than or equal to 1/7. Thus, the charging amount of the first refrigerant or the second refrigerant is determined within the refrigeration temperature range defined by the first temperature threshold and the second temperature threshold so as to meet the refrigeration requirement within the temperature range.
Further, the first temperature threshold is-25 ℃ and the second temperature threshold is-35 ℃.
Further providing the types of a first refrigerant and a second refrigerant, wherein the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant and the second refrigerant is isobutane refrigerant. The evaporation temperature of the ethane refrigerant and the propane refrigerant is lower than that of the isobutane refrigerant, the evaporation temperature of the ethane refrigerant and the evaporation temperature of the propane refrigerant are lower, the refrigeration effect of the refrigeration system can be improved through selection of the evaporation temperatures of the ethane refrigerant and the propane refrigerant, the refrigeration efficiency of the refrigeration system can be improved through selection of the isobutane refrigerant, and energy consumption is reduced.
EXAMPLE six
One embodiment of the present invention provides a method for determining a refrigerant charge amount, which is used for a refrigeration device, where the refrigeration device includes a refrigeration system and a storage chamber, a refrigerant charged in the refrigeration system is a mixed refrigerant, and the mixed refrigerant at least includes: a first refrigerant and a second refrigerant; as shown in fig. 5, the method for determining the refrigerant charge amount includes:
step 1302, acquiring the volume of the storage chamber and a target refrigeration temperature of the storage chamber;
based on the target cooling temperature being less than the second temperature threshold and greater than or equal to the third temperature threshold, the ratio of the charge amount to the volume of the first refrigerant or the second refrigerant is less than or equal to 1/4 and greater than or equal to 1/6 at step 1304; wherein the second temperature threshold is greater than the third temperature threshold.
In this embodiment, the unit of the first refrigerant or the second refrigerant is set to gram, the unit of the volume of the storage compartment is set to liter, and the second temperature threshold is greater than the third temperature threshold. And according to the volume and the target refrigeration temperature, when the target refrigeration temperature is less than the second temperature threshold and is greater than or equal to the third temperature threshold, the ratio of the charging amount of the first refrigerant or the second refrigerant to the volume is less than or equal to 1/4 and is greater than or equal to 1/6. Thus, the charging amount of the first refrigerant or the second refrigerant is determined in the refrigeration temperature range defined by the second temperature threshold and the third temperature threshold, so as to meet the refrigeration requirement in the temperature range.
Further, the second temperature threshold is-35 ℃ and the third temperature threshold is-45 ℃.
Further providing the types of a first refrigerant and a second refrigerant, wherein the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant and the second refrigerant is isobutane refrigerant. The evaporation temperature of the ethane refrigerant and the propane refrigerant is lower than that of the isobutane refrigerant, the evaporation temperature of the ethane refrigerant and the evaporation temperature of the propane refrigerant are lower, the refrigeration effect of the refrigeration system can be improved through selection of the evaporation temperatures of the ethane refrigerant and the propane refrigerant, the refrigeration efficiency of the refrigeration system can be improved through selection of the isobutane refrigerant, and energy consumption is reduced.
EXAMPLE seven
One embodiment of the present invention provides a method for determining a refrigerant charge amount, which is used for a refrigeration device, where the refrigeration device includes a refrigeration system and a storage chamber, a refrigerant charged in the refrigeration system is a mixed refrigerant, and the mixed refrigerant at least includes: a first refrigerant and a second refrigerant; as shown in fig. 6, the method for determining the refrigerant charge amount includes:
1402, obtaining the volume of the storage chamber and the target refrigerating temperature of the storage chamber;
based on the volume being 0 liters or the target cooling temperature being equal to or greater than the first temperature threshold, the charge of the first refrigerant or the second refrigerant is 0 grams, step 1404.
In this embodiment, the storage compartment is not present when its volume is 0 litres. In the case where the target cooling temperature is equal to or greater than the first temperature threshold value, the cooling apparatus does not require a lower cooling temperature. In both cases, the charge amount of the first refrigerant or the second refrigerant is 0 g, i.e. the refrigerant in the refrigeration system is now only a single refrigerant. Further, the first temperature threshold is-25 ℃.
Further providing the types of a first refrigerant and a second refrigerant, wherein the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant and the second refrigerant is isobutane refrigerant. The evaporation temperature of the ethane refrigerant and the propane refrigerant is lower than that of the isobutane refrigerant, the evaporation temperature of the ethane refrigerant and the evaporation temperature of the propane refrigerant are lower, the refrigeration effect of the refrigeration system can be improved through selection of the evaporation temperatures of the ethane refrigerant and the propane refrigerant, the refrigeration efficiency of the refrigeration system can be improved through selection of the isobutane refrigerant, and energy consumption is reduced.
Specifically, the refrigerant filled in the refrigeration system is a refrigerant mixed by R600a and R170, and since the two refrigerants have non-azeotropic property, when the refrigerant enters the first evaporator through the capillary tube throttling and begins to evaporate, the R170 refrigerant evaporates first, and after the R170 evaporation is finished, the R600a evaporates, so that the evaporation temperature of the R170 is lower in the whole evaporation process, and then the evaporation temperature of the R600a is higher as the evaporation is carried out. By utilizing the characteristics, the evaporation temperature of the first evaporator is controlled to be-50 ℃ so that the temperature of the first compartment 102 can be controlled to be-18 ℃ to-40 ℃, the evaporation temperature of the second evaporator is controlled to be-30 ℃ so that the temperature of the second compartment 104 can be controlled to be-16 ℃ to-24 ℃, and the temperature of the third compartment can be controlled to be 0 ℃ to 10 ℃.
According to the formula, the refrigerating coefficient is refrigerating temperature/(environment temperature-refrigerating temperature), the refrigerating coefficient is higher as the environment temperature is closer to the refrigerating temperature, and the efficiency of the refrigerating system is higher, so the design has the advantages that the lower evaporating temperature is used for carrying out heat exchange refrigeration on the lower temperature chambers, and the higher evaporating temperature is used for carrying out heat exchange refrigeration on the higher temperature chambers, so that the refrigerating efficiency of all the chambers is higher compared with the simple lower evaporating temperature. Ambient temperature refers to the ambient temperature within the compartment.
Example eight
In a specific embodiment, as shown in fig. 1 and 2, a refrigeration system 10 and a refrigeration apparatus 1 are provided, wherein the refrigeration system 10 includes: a first evaporator 400, a second evaporator 500, a compressor 200, a condenser 300, a first throttling element 700, a second throttling element 800 and the like. Further, the first throttling element 700 and the second throttling element 800 are both capillary tubes.
The refrigeration equipment 1 is a box product on which the refrigeration system 10 is mounted, and the box is provided with a storage compartment 100, a first compartment 102, and a second compartment 104, the storage compartment 100 being a deep-cooling compartment, the first compartment 102 being a freezing compartment, and the second compartment 104 being a refrigerating compartment.
The refrigeration equipment 1 further comprises a refrigeration system 10, a fan 900, a freezing air supply duct and a refrigerating air supply duct which are used as air outlet ducts 1004, wherein the freezing air supply duct is provided with a freezing air duct air outlet, and the refrigerating air supply duct is provided with a refrigerating air duct air outlet; the return air duct 1006 is provided with a freezing return air duct, a refrigerating return air duct, a freezing return air duct return air inlet and a refrigerating return air duct return air inlet; the refrigerator comprises a refrigerating temperature sensor arranged in the refrigerating chamber, a deep cooling temperature sensor arranged in the deep cooling chamber, a freezing temperature sensor arranged in the freezing chamber, a refrigerating air door arranged in a refrigerating air supply duct and an electric valve.
The second evaporator 500, which is a refrigerating and freezing evaporator, may be a fin evaporator or other components capable of providing cooling to the compartment, and functions to provide cooling to the refrigerating compartment and the freezing compartment.
The compressor 200 provides power to the refrigeration system 10, the condenser 300 functions to dissipate heat in the tank to the outside, and the first throttling element 700 and the second throttling element 800 function as a throttling means.
The fan 900 functions to transfer the cooling capacity of the refrigerating and freezing evaporator to the freezing compartment and the refrigerating compartment while maintaining the circulation of the wind.
The air outlet of the freezing air supply duct is used for supplying air blown out by the refrigerating and freezing fan to the freezing chamber, and the air return opening of the freezing air return duct is used for returning the air supplied by the air outlet of the freezing air supply duct to the refrigerating and freezing evaporator so as to realize the circulation of the air in the freezing chamber.
The refrigerating air supply duct is used for transmitting air blown out by the fan and delivering the air to the refrigerating chamber through the air outlet of the refrigerating air supply duct, and the air enters the refrigerating return duct through the air return opening of the refrigerating return duct after circulating through the refrigerating chamber and then returns to the refrigerating and freezing evaporator through the refrigerating return duct so as to realize circulation of the air in the refrigerating chamber.
The refrigeration temperature sensor functions to control the opening and closing of the refrigeration air and the fan 900, thereby controlling the temperature of the refrigeration compartment.
The cryogenic temperature sensor functions to control the opening and closing of the compressor 200 and the flow path switching of the electric valve to control the temperature of the cryogenic compartment.
The freezing temperature sensor functions to control the opening and closing of the compressor 200 and the fan 900, thereby controlling the temperature of the freezing compartment.
The refrigerating air door is used for controlling whether the refrigerating chamber circulates air or not so as to control whether the refrigerating chamber refrigerates or not.
The electric valve is used for switching a flow path to control the trend of the refrigerant, so that the refrigeration of the compartment is controlled.
Specifically, the refrigerant filling of the refrigeration system 10 may be R600a and R170, or R600a and R290. The storage compartment 100 is a deep cooling compartment, the first compartment 102 is a freezing compartment, the second compartment 104 is a refrigerating compartment, and when the deep cooling compartment, the freezing compartment, and the refrigerating compartment request or do not request a refrigerating state, the flow paths of the refrigerating system are divided into two types: first, the compressor 200 → the condenser 300 → the second throttling element 800 → the second evaporator 500 → the compressor 200; second, the compressor 200 → the condenser 300 → the first throttling element 700 → the first evaporator 400 → the second evaporator 500 → the compressor 200.
Specifically, the refrigeration system 10 and the refrigeration apparatus 1 have the following compartment refrigeration control methods:
when the temperature acquired by the cryogenic temperature sensor is higher than the environmental temperature of the cryogenic chamber, the cryogenic chamber requests refrigeration, otherwise, the cryogenic chamber does not request refrigeration, and the electric valve is controlled to switch the flow path to the second type.
And when the temperature acquired by the freezing temperature sensor is higher than the ambient temperature of the freezing chamber, the freezing chamber requests refrigeration, otherwise, the freezing chamber does not request refrigeration.
And when the temperature acquired by the refrigerating temperature sensor is higher than the ambient temperature of the refrigerating chamber, the refrigerating chamber requests refrigeration, and otherwise, the refrigerating chamber does not request refrigeration.
Specifically, the method for setting the volume of the cryogenic compartment as aL, the required temperature of the cryogenic compartment at the ring temperature of 32 ℃ as b ℃, and the charge amount of R170 or R290 as xg includes the following steps:
when a is 0 or b is more than or equal to-25 ℃, x is 0;
when the temperature is more than or equal to-35 ℃ and less than or equal to b < -25 ℃, the refrigerant filled into the system is a mixed refrigerant of R600a and R290, x is more than or equal to 1/7: a <1/4
When the temperature is more than or equal to minus 45 ℃ and less than or equal to b < -35 ℃, the refrigerant filled into the system is a mixed refrigerant of R600a and R170, and the ratio of 1/6 to x is: a < 1/4.
The invention provides a mixed working medium refrigerating system and a refrigerator thereof, which utilize the characteristic of temperature displacement in the evaporation process of a mixed working medium refrigerant to realize that the lower evaporation temperature carries out heat exchange refrigeration on a lower temperature chamber, and the higher evaporation temperature carries out heat exchange refrigeration on a higher temperature chamber, so that the refrigerating efficiency of all chambers is higher compared with the simple lower evaporation temperature, and the energy consumption is reduced.
The invention provides a method for determining the refrigerant charging amount, which determines the charging amount according to the chamber volume and the deep cooling chamber required temperature, thereby meeting different temperature requirements, and further determining the charging amount by combining the proportion of mixed working media.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, unless otherwise expressly limited, for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in the particular orientation, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A refrigeration apparatus, comprising:
the box body is provided with a storage chamber;
the refrigerant filled in the refrigerating system is mixed refrigerant, and the mixed refrigerant at least comprises: a first refrigerant and a second refrigerant;
wherein the charge amount of the first refrigerant or the second refrigerant is determined according to the volume of the storage compartment and a target cooling temperature of the storage compartment.
2. The refrigeration apparatus as set forth in claim 1 wherein said refrigeration system further includes:
a compressor provided with a discharge port and a return port, the compressor being charged with the mixed refrigerant;
the inlet end of the condenser is communicated with the exhaust port;
a first evaporator having an inlet end in communication with an outlet end of the condenser, the first evaporator being configured and adapted to refrigerate the storage compartment;
the inlet end of the second evaporator is communicated with the outlet end of the first evaporator, and the outlet end of the second evaporator is communicated with the air return port;
the inlet of the valve body is communicated with the outlet end of the condenser, the first outlet of the valve body is communicated with the inlet end of the first evaporator, and the second outlet of the valve body is communicated with the inlet end of the second evaporator;
the two ends of the first throttling element are respectively communicated with the second outlet of the valve body and the inlet end of the second evaporator;
wherein the valve body is configured to be adapted to switch a flow direction of the mixed refrigerant.
3. The refrigeration apparatus as set forth in claim 2 wherein said refrigeration system further includes:
and two ends of the second throttling element are respectively communicated with the first outlet of the valve body and the inlet end of the first evaporator.
4. The refrigeration appliance according to any one of claims 1 to 3, wherein the cabinet further comprises:
a first compartment;
the refrigerating system is arranged in the heat exchange cavity;
an air inlet of the air outlet duct is communicated with the heat exchange cavity, and a first air outlet of the air outlet duct is communicated with the first compartment;
and a first air return opening of the air return duct is communicated with the first compartment, and an air outlet of the air return duct is communicated with the heat exchange cavity.
5. The refrigeration appliance according to claim 4, wherein the cabinet further comprises:
a second air outlet of the air outlet duct is communicated with the second compartment, and a second air return inlet of the air return inlet is communicated with the second compartment;
and the air door is arranged on the air outlet duct and is positioned between the air inlet and the second air outlet.
6. A method for determining the refrigerant charge amount is used for refrigeration equipment, and is characterized in that the refrigeration equipment comprises a refrigeration system and a storage chamber, the refrigerant charged by the refrigeration system is mixed refrigerant, and the mixed refrigerant at least comprises the following components: a first refrigerant and a second refrigerant; the method for determining the refrigerant charge amount comprises the following steps:
acquiring the volume of the storage chamber and the target refrigeration temperature of the storage chamber;
determining a charge amount of the first refrigerant or the second refrigerant according to the volume and the target refrigeration temperature.
7. The method for determining a refrigerant charge amount according to claim 6, wherein the step of determining the charge amount of the first refrigerant or the second refrigerant according to the volume and the target cooling temperature specifically includes:
a ratio of a charge amount of the first refrigerant or the second refrigerant to the volume is equal to or less than 1/4 and equal to or greater than 1/7 based on a condition that the target cooling temperature is less than a first temperature threshold and equal to or greater than a second temperature threshold;
wherein the first temperature threshold is greater than the second temperature threshold.
8. The method for determining a refrigerant charge amount according to claim 7, wherein the step of determining the charge amount of the first refrigerant or the second refrigerant according to the volume and the target cooling temperature specifically includes:
a ratio of a charge amount of the first refrigerant or the second refrigerant to the volume is equal to or less than 1/4 and equal to or greater than 1/6 based on the target cooling temperature being less than the second temperature threshold and equal to or greater than a third temperature threshold;
wherein the second temperature threshold is greater than the third temperature threshold.
9. The method for determining a refrigerant charge amount according to claim 6, wherein the step of determining the charge amount of the first refrigerant or the second refrigerant according to the volume and the target cooling temperature specifically includes:
based on the volume being 0 liters or the target refrigeration temperature being equal to or greater than a first temperature threshold, the charge of the first refrigerant or the second refrigerant is 0 grams.
10. The method for determining a refrigerant charge according to claim 8,
the first temperature threshold is-25 ℃, the second temperature threshold is-35 ℃, and the third temperature threshold is-45 ℃.
11. The method for determining the refrigerant charge amount according to any one of claims 6 to 10, wherein the first refrigerant is an ethane refrigerant, and the second refrigerant is an isobutane refrigerant; or the first refrigerant is propane refrigerant, and the second refrigerant is isobutane refrigerant.
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| CN202010088836.7A CN113324362A (en) | 2020-02-12 | 2020-02-12 | Refrigeration equipment and method for determining refrigerant charge |
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| CN202010088836.7A CN113324362A (en) | 2020-02-12 | 2020-02-12 | Refrigeration equipment and method for determining refrigerant charge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247918A (en) * | 2022-06-29 | 2022-10-28 | 宁波方太厨具有限公司 | Method for determining refrigerant charge amount of refrigerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115247918A (en) * | 2022-06-29 | 2022-10-28 | 宁波方太厨具有限公司 | Method for determining refrigerant charge amount of refrigerator |
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