CN118089260A - Refrigerating system, refrigerating equipment and refrigerating control method - Google Patents
Refrigerating system, refrigerating equipment and refrigerating control method Download PDFInfo
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- CN118089260A CN118089260A CN202211466522.1A CN202211466522A CN118089260A CN 118089260 A CN118089260 A CN 118089260A CN 202211466522 A CN202211466522 A CN 202211466522A CN 118089260 A CN118089260 A CN 118089260A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007710 freezing Methods 0.000 claims abstract description 128
- 230000008014 freezing Effects 0.000 claims abstract description 128
- 238000005057 refrigeration Methods 0.000 claims abstract description 125
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 238000001704 evaporation Methods 0.000 claims description 20
- 230000008020 evaporation Effects 0.000 claims description 19
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 30
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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Abstract
The invention particularly relates to a refrigeration system, refrigeration equipment and a refrigeration control method. The refrigerating system comprises a compressor, a first condenser, a freezing capillary tube and a freezing evaporator which are connected through pipelines; the refrigeration system also comprises a variable-temperature cooling branch arranged in parallel with the freezing capillary tube, wherein the variable-temperature cooling branch comprises a variable-temperature capillary tube and a variable-temperature evaporator which are connected through a pipeline; the refrigeration system further includes a second condenser connected in parallel with a connecting line between the first condenser and the cryocapillary tube. The invention can reduce the turn-on probability of the whole machine, reduce the running power consumption of the whole machine, and has the advantages of high refrigeration efficiency, energy conservation, high efficiency and cost reduction.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigeration system, refrigeration equipment and a refrigeration control method.
Background
At present, when three compartments are refrigerated together due to the existence of refrigeration priority of a refrigeration compartment or a temperature-changing compartment, the refrigerating capacity allocated to the refrigeration compartment can only reduce the temperature return speed of the refrigeration compartment or slowly cool the refrigeration compartment, and when the refrigeration compartment and the temperature-changing compartment reach a set temperature stop point, the electromagnetic valve is switched to the refrigeration capillary tube and the refrigeration evaporator to refrigerate the refrigeration compartment; if the refrigerating compartment speed is too slow, the refrigerating compartment or the temperature changing compartment reaches the starting point, and the compressor is not stopped, so that the power consumption of the whole machine is increased. Therefore, there is a need to develop a refrigeration system, a refrigeration apparatus, and a refrigeration control method to solve the above problems.
Disclosure of Invention
The invention aims to provide an energy-saving and efficient refrigerating system.
To achieve the above object, an embodiment of the present invention provides a refrigeration system including a compressor, a first condenser, a freezing capillary tube, and a freezing evaporator connected by a pipe;
the refrigeration system also comprises a variable-temperature cooling branch arranged in parallel with the freezing capillary tube, wherein the variable-temperature cooling branch comprises a variable-temperature capillary tube and a variable-temperature evaporator which are connected through a pipeline;
The refrigeration system further includes a second condenser connected in parallel with a connecting line between the first condenser and the cryocapillary tube.
As a further improvement of an embodiment of the present invention, the second condenser is disposed adjacent to the temperature change evaporator.
As a further improvement of an embodiment of the present invention, the outlet end of the temperature changing evaporator and the outlet end of the freezing capillary tube are connected in parallel to the inlet end of the freezing evaporator.
As a further improvement of an embodiment of the present invention, the refrigerator further comprises a refrigeration cooling branch connected in parallel with the freezing capillary tube, wherein the refrigeration cooling branch comprises a refrigeration capillary tube and a refrigeration evaporator connected through a pipeline, and an outlet end of the refrigeration evaporator and an outlet end of the freezing capillary tube are connected in parallel with an inlet end of the freezing evaporator.
As a further improvement of an embodiment of the present invention, the four-way electromagnetic valve is connected to the outlet pipe of the first condenser, and the four-way electromagnetic valve has one inlet and three outlets;
wherein, the inlet of the four-way electromagnetic valve is connected with the pipeline of the outlet end of the first condenser;
an outlet of the four-way electromagnetic valve is connected with a refrigerating and cooling branch;
two outlets of the four-way electromagnetic valve are connected with a variable-temperature cooling branch;
the three outlets of the four-way electromagnetic valve are connected with the freezing capillary tube.
As a further improvement of an embodiment of the present invention, the three-way electromagnetic valve further comprises a three-way electromagnetic valve connected between the first condenser and the four-way electromagnetic valve, wherein the three-way electromagnetic valve is provided with a first inlet, a second outlet and a third outlet;
The first inlet is connected with the outlet of the first condenser, and the second outlet and the third outlet are respectively connected with the inlet of the four-way electromagnetic valve and the inlet of the second condenser;
the outlet of the second condenser is connected with a connecting pipeline between the second outlet and the inlet of the four-way electromagnetic valve.
As a further improvement of an embodiment of the present invention, the air conditioner further comprises a dew removing pipe connected between the compressor and the first condenser, and a dry filter connected between the first condenser and the inlet of the four-way solenoid valve.
In order to solve the problems, the invention also provides refrigeration equipment.
A refrigeration device comprising a housing comprising a variable temperature compartment and a refrigeration compartment, the refrigeration device further comprising a refrigeration system as described above;
the refrigeration equipment also comprises a temperature sensor arranged at the inlet of the variable-temperature evaporator;
wherein, the variable temperature evaporator and the freezing evaporator are respectively arranged corresponding to the variable temperature chamber and the freezing chamber.
As a further improvement of an embodiment of the present invention, the temperature changing evaporator has the same structure as the freezing evaporator.
In order to solve the problems, the invention also provides a refrigeration control method.
A refrigeration control method of a refrigeration apparatus as described above, comprising,
Acquiring a signal of a refrigeration request of at least one of the variable-temperature compartment and the freezing compartment, and starting the compressor, wherein the signal of the refrigeration request means that the temperature in the compartment reaches a preset starting temperature value corresponding to the compartment;
When signals of refrigeration requests in the variable-temperature chamber and the freezing chamber are obtained, the variable-temperature cooling branch is directly connected with the first condenser, a connecting pipeline between the first condenser and the freezing capillary is disconnected, and a connecting pipeline between the first condenser and the second condenser is disconnected to obtain the temperature T Variable temperature of the variable-temperature chamber;
when the temperature T Variable temperature of the variable-temperature chamber reaches a preset shutdown temperature value of the variable-temperature chamber, disconnecting the variable-temperature cooling branch from the first condenser, and sequentially conducting the first condenser, the second condenser and the freezing capillary tube to obtain the temperature T Freezing of the freezing chamber;
When the temperature T Freezing of the freezing compartment reaches a preset shutdown temperature value of the freezing compartment, the compressor is turned off.
As a further improvement of an embodiment of the invention, when the variable temperature cooling branch is disconnected from the first condenser, and the first condenser, the second condenser and the freezing capillary tube are sequentially conducted, the temperature T Variable temperature in the variable temperature chamber and the temperature T Evaporation at the inlet of the variable temperature evaporator are obtained, and whether the difference value T Variable temperature -T Evaporation between T Variable temperature and T Evaporation meets T Variable temperature -T Evaporation ＜T Presetting or not is judged, wherein T Presetting is more than 0;
when T Variable temperature -T Evaporation meets T Variable temperature -T Evaporation ＜T Presetting , disconnecting a connecting pipeline between the first condenser and the second condenser, and directly conducting the first condenser and the freezing capillary tube to obtain the temperature T Freezing of the freezing compartment;
When the temperature T Freezing of the freezing compartment reaches a preset shutdown temperature value of the freezing compartment, the compressor is turned off.
As a further improvement of one embodiment of the present invention, T Presetting is set at 3 ℃.
Compared with the prior art, the invention has the beneficial effects that: according to the refrigeration system, the refrigeration equipment and the refrigeration control method, the variable-temperature cooling branch is arranged in parallel with the freezing capillary tube to form a plurality of refrigeration loops, the second condenser is selectively connected to the connecting pipeline between the first condenser and the freezing capillary tube through the second condenser which is connected in parallel with the connecting pipeline between the first condenser and the freezing capillary tube, when the variable-temperature cooling branch is connected, the second condenser is disconnected from the first condenser, and when the freezing capillary tube is connected, the second condenser is connected between the first condenser and the freezing capillary tube, so that surplus cold in the variable-temperature evaporator cools high-temperature high-pressure refrigerant in the first condenser and the second condenser, the condensation amount of the refrigeration system is improved, the temperature of the refrigerant entering the freezing evaporator is reduced, the heat exchange efficiency of the freezing evaporator is improved, the freezing cooling rate is improved, the starting probability of the whole machine is reduced, and the running power consumption of the whole machine is reduced.
Drawings
FIG. 1 is a schematic diagram of the structural composition of a refrigeration system according to the present invention without a refrigeration bypass;
fig. 2 is a schematic structural diagram of the refrigeration system according to the present invention including a refrigeration and cold supply branch.
In the figure: 11. a compressor; 12. a first condenser; 13. freezing the capillary tube; 14. a freezing evaporator; 15. a second condenser; 16. a dew removing pipe; 17. drying the filter; 21. a temperature-changing capillary tube; 22. a variable temperature evaporator; 31. refrigerating the capillary tube; 32. a refrigerated evaporator; 41. a four-way electromagnetic valve; 42. a three-way electromagnetic valve; 421. a first inlet; 422. a second outlet; 423. a third outlet; .
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
As shown in connection with fig. 1 and 2, in this embodiment, the present invention mainly relates to: a refrigeration appliance includes a housing defining a storage compartment including a variable temperature compartment and a refrigeration compartment, preferably the storage compartment further including a refrigeration compartment. The refrigeration equipment also comprises a refrigeration system for refrigerating the storage compartment.
A refrigeration system comprising a compressor 11, a first condenser 12, a freezing capillary tube 13, a freezing evaporator 14 connected by piping.
The refrigerant is compressed by the compressor 11 and enters the first condenser 12, the gas-liquid two-phase refrigerant is condensed into gas-liquid two-phase refrigerant, the gas-liquid two-phase refrigerant is discharged from the first condenser 12 and enters the freezing capillary tube 13 for throttling, the temperature and the pressure of the refrigerant are reduced to the required evaporating temperature, the refrigerant enters the freezing evaporator 14 and exchanges heat with a heat load, the refrigerant at the outlet end of the evaporator is in a superheated gas state, and the refrigerant in the superheated gas state finally returns to the compressor 11, so that the aim of refrigerating a freezing compartment is fulfilled.
Further, the refrigeration equipment further comprises a temperature sensor arranged at the inlet of the variable-temperature evaporator, and the temperature sensor is used for detecting the temperature value at the inlet of the variable-temperature evaporator.
Further, the refrigeration system also comprises a variable temperature cooling branch arranged in parallel with the freezing capillary tube 13, and the variable temperature cooling branch comprises a variable temperature capillary tube 21 and a variable temperature evaporator 22 which are connected through pipelines. The temperature-changing capillary tube 21, the temperature-changing evaporator 22 and the freezing capillary tube 13 are connected in parallel and are respectively connected with the first condenser 12 in pipeline connection, so as to meet the requirement of refrigerating the temperature-changing compartment.
Wherein the variable temperature evaporator 22 and the freezing evaporator 14 are respectively arranged corresponding to the variable temperature chamber and the freezing chamber.
The refrigeration system further comprises a second condenser 15 connected in parallel with the connection between the first condenser 12 and the cryocapillary 13, so that the second condenser 15 is selectively connected between the first condenser 12 and the cryocapillary 13.
When the temperature-changing compartment and the freezing compartment have refrigeration requirements at the same time, the temperature-changing compartment is preferentially refrigerated, when the temperature-changing cooling branch begins to refrigerate, the inlet temperature of the temperature-changing evaporator 22 is lower, the temperature-changing compartment can quickly reach the preset shutdown temperature value of the temperature-changing compartment, the temperature-changing compartment can be switched to the freezing capillary tube 13 for refrigeration, and because the temperature-changing evaporator 22 has more low-temperature refrigerant, the second condenser 15 is conducted, so that surplus cold in the temperature-changing evaporator 22 cools the high-temperature and high-pressure refrigerant in the first condenser 12 and the second condenser 15, thereby reducing the temperature of the refrigerant entering the freezing evaporator 14, improving the heat exchange efficiency of the freezing evaporator 14, improving the freezing cooling rate, reducing the starting probability of the whole machine and reducing the running power consumption of the whole machine.
It can be understood that when the temperature-changing evaporator 22 has surplus cold energy, the surplus cold energy can be connected between the first condenser 12 and the freezing capillary 13 through the second condenser 15, so that the high-temperature and high-pressure refrigerant in the first condenser 12 and the second condenser 15 is cooled by the surplus cold energy in the temperature-changing evaporator 22.
Further, the second condenser 15 is arranged adjacent to the variable temperature evaporator 22, heat emitted by the second condenser 15 during operation can defrost the variable temperature evaporator 22, and the frost on the variable temperature evaporator 22 is reduced, so that the working efficiency of the variable temperature evaporator 22 is improved, and cold of the variable temperature evaporator 22 enters a loop of a refrigerating system as much as possible, so that the heat exchange efficiency of the freezing evaporator 14 is further improved, the freezing cooling rate of the freezing evaporator 14 is improved, the energy efficiency ratio is improved, the complete machine starting rate is improved, and the running power consumption of the complete machine is reduced.
Further, the outlet end of the variable temperature evaporator 22 and the outlet end of the freezing capillary 13 are connected in parallel to the inlet end of the freezing evaporator 14, and the refrigerant passing through the variable temperature evaporator 22 is required to pass through the freezing evaporator 14 and finally enter the compressor 11 after flowing out of the variable temperature evaporator 22.
Further, the refrigeration system further comprises a refrigeration cooling branch arranged in parallel with the freezing capillary tube 13, and the refrigeration cooling branch comprises a refrigeration capillary tube 31 and a refrigeration evaporator 32 which are connected through pipelines. The refrigerating and cooling branch is arranged corresponding to the refrigerating compartment, and the refrigerating and cooling branch and the variable-temperature cooling branch are respectively arranged in parallel with the freezing capillary tube 13 so as to meet different refrigeration demands.
Wherein the outlet end of the refrigeration evaporator 32 and the outlet end of the freezing capillary tube 13 are connected in parallel to the inlet end of the freezing evaporator 14. After flowing out of the refrigerating evaporator 32, the refrigerant passing through the refrigerating evaporator 32 also passes through the freezing evaporator 14 and then enters the compressor 11, and by the arrangement, the refrigerating capacity of the freezing compartment can be improved, so that the freezing performance is improved, the starting rate of the whole machine is reduced, and the running power consumption of the whole machine is reduced.
It will be appreciated that the refrigeration system may further include other cooling branches, and the arrangement of the capillaries and evaporators of the other cooling branches is set according to the requirements of the refrigeration temperature zone, which is not described in detail herein.
Further, the refrigeration system further comprises a four-way electromagnetic valve 41 connected to the outlet pipe of the first condenser 12, the four-way electromagnetic valve 41 has one inlet and three outlets, and the three outlets of the four-way electromagnetic valve 41 are used for switching and connecting the refrigeration cooling branch, the variable-temperature cooling branch and the freezing capillary tube 13, so that the refrigeration requirements under different conditions are met.
Wherein, the inlet of the four-way electromagnetic valve 41 is connected with the pipeline of the outlet of the first condenser 12; an outlet of the four-way electromagnetic valve 41 is connected with a refrigerating and cooling branch; two outlets of the four-way electromagnetic valve 41 are connected with a variable-temperature cooling branch; the three outlets of the four-way solenoid valve 41 are connected with the freezing capillary tube 13 to meet the refrigeration requirements under different conditions.
Further, the refrigeration system further comprises a three-way electromagnetic valve 42 connected between the first condenser 12 and the four-way electromagnetic valve 41, the three-way electromagnetic valve 42 has a first inlet 421, a second outlet 422, and a third outlet 423, and the three-way electromagnetic valve 42 is used for realizing a connection pipeline of the second condenser 15 selectively connected between the first condenser 12 and the freezing capillary tube 13.
The first inlet 421 is connected to the outlet of the first condenser 12, and the second outlet 422 and the third outlet 423 are connected to the inlet of the four-way solenoid valve 41 and the inlet of the second condenser 15, respectively. The outlet of the second condenser 15 is connected to a connection line between the second outlet 422 and the inlet of the four-way solenoid valve 41.
When the refrigerating compartment, the temperature changing compartment and the freezing compartment need to be refrigerated at the same time, the refrigeration priority level is as follows: the refrigerating compartment is superior to the temperature changing compartment, and the temperature changing compartment is superior to the freezing compartment.
Refrigerating in the refrigerating compartment: the first inlet 421 and the second outlet 422 of the three-way electromagnetic valve 42 are connected, the third outlet 423 of the three-way electromagnetic valve 42 is disconnected, the inlet and the first outlet of the four-way electromagnetic valve 41 are connected, and the two outlets and the three outlets of the four-way electromagnetic valve 41 are disconnected. The circulation path of the refrigerant is: a compressor 11, a first condenser 12, a refrigeration capillary 31, a refrigeration evaporator 32, and a refrigeration evaporator 14.
When the temperature-changing compartment is refrigerated; the first inlet 421 and the second outlet 422 of the three-way electromagnetic valve 42 are connected, the third outlet 423 of the three-way electromagnetic valve 42 is disconnected, the inlet and the second outlet of the four-way electromagnetic valve 41 are connected, and the first outlet and the third outlet of the four-way electromagnetic valve 41 are disconnected. The circulation path of the refrigerant is: a compressor 11, a first condenser 12, a temperature change capillary 21, a temperature change evaporator 22, and a freeze evaporator 14.
When the freezing compartment is refrigerated: first, the first inlet 421 and the third outlet 423 of the three-way electromagnetic valve 42 are connected, the second outlet 422 of the three-way electromagnetic valve 42 is disconnected, the inlet and the three outlets of the four-way electromagnetic valve 41 are connected, and the first outlet and the second outlet of the four-way electromagnetic valve 41 are disconnected.
The circulation path of the refrigerant is: a compressor 11, a first condenser 12, a second condenser 15, a freezing capillary tube 13, and a freezing evaporator 14. Further, the temperature change evaporator 22 has a rich unidirectional flow path of the refrigerant: the temperature-changing evaporator 22, the freezing evaporator 14, the first condenser 12, and the second condenser 15 are connected to the first inlet 421 and the second outlet 422 of the three-way electromagnetic valve 42, and the third outlet 423 of the three-way electromagnetic valve 42 is disconnected until a certain condition is satisfied, and at this time, the circulation path of the refrigerant is: a compressor 11, a first condenser 12, a freezing capillary tube 13, and a freezing evaporator 14.
Further, the refrigeration system further includes a dew removing pipe 16 connected between the compressor 11 and the first condenser 12, and a dry filter 17 connected between the first condenser 12 and an inlet of the four-way solenoid valve 41. The dew removing pipe 16 is arranged at the opening of the storage compartment.
After being compressed, the refrigerant flows to the dew removing pipe 16 and the first condenser 12 through pipelines, the refrigerant heats the opening of the storage compartment in the dew preventing pipe 33, and the dew removing pipe 16 and the first condenser 12 both play a role in condensing the refrigerant. The refrigerant flows to the dry filter 17 after cooling, and after drying and filtering, the moisture and impurities of the refrigerant are reduced.
Further, the structure of the variable temperature evaporator 22 is the same as that of the freezing evaporator 14, that is, the heat exchange performance of the variable temperature evaporator 22 is the same as that of the freezing evaporator 14, so that the variable temperature evaporator 22 can store more cold energy conveniently, and the wide and large refrigeration temperature of the variable temperature evaporator 22 can be ensured, for example, the refrigeration temperature range of the variable temperature chamber is 8-18 ℃, and the refrigeration temperature range of the freezing chamber is-14-24 ℃.
In order to solve the problems, the invention also provides a refrigeration control method of the refrigeration equipment.
The refrigeration control method comprises the following steps:
Acquiring a signal of a refrigeration request of at least one of the variable-temperature compartment and the freezing compartment, and starting the compressor 11, wherein the signal of the refrigeration request means that the temperature in the compartment reaches a preset starting temperature value corresponding to the compartment;
When signals of refrigeration requests in the variable-temperature chamber and the freezing chamber are obtained, the variable-temperature cooling branch is directly connected with the first condenser 12, a connecting pipeline between the first condenser 12 and the freezing capillary 13 is disconnected, and a connecting pipeline between the first condenser 12 and the second condenser 15 is disconnected to obtain the temperature T Variable temperature of the variable-temperature chamber;
When the temperature T Variable temperature of the variable-temperature chamber reaches a preset shutdown temperature value of the variable-temperature chamber, disconnecting the variable-temperature cooling branch from the first condenser 12, and sequentially conducting the first condenser 12, the second condenser 15 and the freezing capillary tube 13 to obtain the temperature T Freezing of the freezing chamber;
When the temperature T Freezing of the freezer compartment reaches a preset shutdown temperature value of the freezer compartment, the compressor 11 is turned off.
Specifically, when both the temperature-changing chamber and the freezing chamber have refrigeration requests, the temperature-changing chamber is preferentially refrigerated, the second condenser 15 is not connected to the connecting pipeline between the first condenser 12 and the freezing capillary 13, when the temperature T Variable temperature of the temperature-changing chamber reaches a preset shutdown temperature value, the refrigerating chamber is refrigerated, the second condenser 15 is connected to the connecting pipeline between the first condenser 12 and the freezing capillary 13, and the surplus cold in the temperature-changing evaporator 22 cools the high-temperature and high-pressure refrigerants in the first condenser 12 and the second condenser 15 to improve the condensation amount of the refrigerating system, so that the temperature of the refrigerant entering the freezing evaporator 14 is reduced.
Further, when the variable-temperature cooling branch is disconnected from the first condenser 12 and the first condenser 12, the second condenser 15 and the freezing capillary 13 are sequentially conducted, the temperature T Variable temperature in the variable-temperature chamber and the temperature T Evaporation at the inlet of the variable-temperature evaporator 22 are obtained, and whether the difference T Variable temperature -T Evaporation between T Variable temperature and T Evaporation meets T Variable temperature -T Evaporation ＜T Presetting or not is judged, wherein T Presetting is more than 0;
When T Variable temperature -T Evaporation meets T Variable temperature -T Evaporation ＜T Presetting , disconnecting the connecting pipeline between the first condenser 12 and the second condenser 15, and directly conducting the first condenser 12 and the freezing capillary 13 to obtain the temperature T Freezing of the freezing compartment;
When the temperature T Freezing of the freezer compartment reaches a preset shutdown temperature value of the freezer compartment, the compressor 11 is turned off.
Specifically, when the difference between the temperature T Variable temperature in the temperature changing chamber and the temperature T Evaporation at the inlet of the temperature changing evaporator 22 is less than or equal to T Presetting , the surplus cold energy of the temperature changing evaporator 22 is already consumed, and in order not to affect the refrigerating effect in the temperature changing chamber, the second condenser 15 needs to be disconnected to improve the refrigerating effect of the multiple temperature areas of the refrigerating device.
According to the tests of the inventors, in this example, T Presetting is set to 3 ℃.
Compared with the prior art, the refrigeration system, the refrigeration equipment and the refrigeration control method provided by the invention have the advantages that the variable-temperature cooling branch is connected with the refrigeration capillary 13 in parallel to form a plurality of refrigeration loops, the second condenser 15 is connected with the connecting pipeline between the first condenser 12 and the refrigeration capillary 13 in parallel through the second condenser 15 connected with the connecting pipeline between the first condenser 12 and the refrigeration capillary 13 in parallel, when the variable-temperature cooling branch is connected, the second condenser 15 is disconnected with the first condenser 12, and when the refrigeration capillary 13 is connected, the second condenser 15 is connected between the first condenser 12 and the refrigeration capillary 13, so that the surplus cold energy in the variable-temperature evaporator 22 cools the high-temperature and high-pressure refrigerant in the first condenser 12 and the second condenser 15, thereby improving the condensation amount of the refrigeration system, reducing the temperature of the refrigerant entering the refrigeration evaporator 14, improving the heat exchange efficiency of the refrigeration evaporator 14, improving the refrigeration cooling rate, reducing the running power consumption, and having the advantages of high refrigeration efficiency, energy saving, high efficiency and low cost.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be understood that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (12)
1. A refrigerating system comprises a compressor, a first condenser, a freezing capillary tube and a freezing evaporator which are connected through pipelines;
The refrigeration system also comprises a variable-temperature cooling branch arranged in parallel with the freezing capillary tube, wherein the variable-temperature cooling branch comprises a variable-temperature capillary tube and a variable-temperature evaporator which are connected through a pipeline; it is characterized in that the method comprises the steps of,
The refrigeration system further includes a second condenser connected in parallel with a connecting line between the first condenser and the cryocapillary tube.
2. A refrigeration system as set forth in claim 1 wherein: the second condenser is arranged adjacent to the variable temperature evaporator.
3. A refrigeration system as set forth in claim 1 wherein: the outlet end of the temperature changing evaporator and the outlet end of the freezing capillary tube are connected in parallel with the inlet end of the freezing evaporator.
4. A refrigeration system as set forth in claim 1 wherein: the refrigerating and cooling device is characterized by further comprising a refrigerating and cooling branch which is arranged in parallel with the freezing capillary, wherein the refrigerating and cooling branch comprises a refrigerating capillary and a refrigerating evaporator which are connected through a pipeline, and the outlet end of the refrigerating evaporator and the outlet end of the freezing capillary are connected in parallel with the inlet end of the freezing evaporator.
5. The refrigeration system of claim 4, wherein: the four-way electromagnetic valve is connected to the outlet pipeline of the first condenser and is provided with an inlet and three outlets;
wherein, the inlet of the four-way electromagnetic valve is connected with the pipeline of the outlet end of the first condenser;
an outlet of the four-way electromagnetic valve is connected with a refrigerating and cooling branch;
two outlets of the four-way electromagnetic valve are connected with a variable-temperature cooling branch;
the three outlets of the four-way electromagnetic valve are connected with the freezing capillary tube.
6. A refrigeration system as set forth in claim 5 wherein: the three-way electromagnetic valve is connected between the first condenser and the four-way electromagnetic valve and is provided with a first inlet, a second outlet and a third outlet;
The first inlet is connected with the outlet of the first condenser, and the second outlet and the third outlet are respectively connected with the inlet of the four-way electromagnetic valve and the inlet of the second condenser;
the outlet of the second condenser is connected with a connecting pipeline between the second outlet and the inlet of the four-way electromagnetic valve.
7. A refrigeration system as set forth in claim 5 wherein: the air conditioner further comprises a dew removing pipe connected between the compressor and the first condenser and a dry filter connected between the first condenser and an inlet of the four-way solenoid valve.
8. The utility model provides a refrigeration plant, includes the box, and the box includes alternating temperature room and freezing room, its characterized in that: the refrigeration apparatus further comprising a refrigeration system according to any of claims 1 to 7;
the refrigeration equipment also comprises a temperature sensor arranged at the inlet of the variable-temperature evaporator;
wherein, the variable temperature evaporator and the freezing evaporator are respectively arranged corresponding to the variable temperature chamber and the freezing chamber.
9. The refrigeration appliance of claim 8 wherein: the temperature-changing evaporator has the same structure as the freezing evaporator.
10. A refrigeration control method of a refrigeration apparatus according to claim 8 or 9, characterized in that: comprising the steps of (a) a step of,
Acquiring a signal of a refrigeration request of at least one of the variable-temperature compartment and the freezing compartment, and starting the compressor, wherein the signal of the refrigeration request means that the temperature in the compartment reaches a preset starting temperature value corresponding to the compartment;
When signals of refrigeration requests in the variable-temperature chamber and the freezing chamber are obtained, the variable-temperature cooling branch is directly connected with the first condenser, a connecting pipeline between the first condenser and the freezing capillary is disconnected, and a connecting pipeline between the first condenser and the second condenser is disconnected to obtain the temperature T Variable temperature of the variable-temperature chamber;
when the temperature T Variable temperature of the variable-temperature chamber reaches a preset shutdown temperature value of the variable-temperature chamber, disconnecting the variable-temperature cooling branch from the first condenser, and sequentially conducting the first condenser, the second condenser and the freezing capillary tube to obtain the temperature T Freezing of the freezing chamber;
When the temperature T Freezing of the freezing compartment reaches a preset shutdown temperature value of the freezing compartment, the compressor is turned off.
11. The refrigeration control method according to claim 10, characterized in that:
When the variable-temperature cooling branch is disconnected from the first condenser, and the first condenser, the second condenser and the freezing capillary tube are sequentially conducted, acquiring the temperature T Variable temperature in the variable-temperature chamber and the temperature T Evaporation at the inlet of the variable-temperature evaporator, and judging whether the difference value T Variable temperature -T Evaporation between T Variable temperature and T Evaporation meets T Variable temperature -T Evaporation ＜T Presetting or not, wherein T Presetting is more than 0;
when T Variable temperature -T Evaporation meets T Variable temperature -T Evaporation ＜T Presetting , disconnecting a connecting pipeline between the first condenser and the second condenser, and directly conducting the first condenser and the freezing capillary tube to obtain the temperature T Freezing of the freezing compartment;
When the temperature T Freezing of the freezing compartment reaches a preset shutdown temperature value of the freezing compartment, the compressor is turned off.
12. The refrigeration control method according to claim 11, characterized in that: t Presetting was set at3 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211466522.1A CN118089260A (en) | 2022-11-22 | 2022-11-22 | Refrigerating system, refrigerating equipment and refrigerating control method |
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| CN202211466522.1A CN118089260A (en) | 2022-11-22 | 2022-11-22 | Refrigerating system, refrigerating equipment and refrigerating control method |
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| CN202211466522.1A Pending CN118089260A (en) | 2022-11-22 | 2022-11-22 | Refrigerating system, refrigerating equipment and refrigerating control method |
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