CN215892861U - Refrigerating system for refrigerating and freezing device and refrigerating and freezing device - Google Patents
Refrigerating system for refrigerating and freezing device and refrigerating and freezing device Download PDFInfo
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- CN215892861U CN215892861U CN202121459464.0U CN202121459464U CN215892861U CN 215892861 U CN215892861 U CN 215892861U CN 202121459464 U CN202121459464 U CN 202121459464U CN 215892861 U CN215892861 U CN 215892861U
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Abstract
The utility model provides a refrigeration system for a refrigeration and freezing device and the refrigeration and freezing device, wherein the refrigeration system comprises: the refrigeration assembly is provided with a compressor, a first evaporator and a second evaporator which are sequentially connected in series to form a refrigeration circuit; wherein a first flow pipe for circulating refrigerant is formed inside the second evaporator; the first bypass cooling pipeline is connected to the refrigeration loop and is communicated with the outlet of the first evaporator and the first flow pipe; the first bypass cooling supply pipeline is provided with a bypass throttling device and is used for throttling the refrigerant flowing out of the first evaporator and flowing to the first circulation pipe by using the bypass throttling device when the first evaporator defrosts by using the refrigerant from the compressor. According to the utility model, through the structural improvement of the refrigerating system, the defrosting speed is improved, and meanwhile, the obvious temperature fluctuation of the storage chamber can be effectively prevented.
Description
Technical Field
The present invention relates to refrigeration, and more particularly to a refrigeration system for a refrigeration and freezing apparatus and a refrigeration and freezing apparatus.
Background
In a refrigerating and freezing apparatus such as a refrigerator, a freezer, and the like, an evaporator is easily frosted due to a low surface temperature at the time of cooling. In the prior art, a part of refrigeration and freezing devices adopt a defrosting heating wire to heat an evaporator to defrost.
The inventor realizes that the defrosting mode is slow in defrosting speed and long in defrosting period, and obvious temperature rise of the storage chamber can be caused. By introducing the refrigerant from the compressor into the evaporator and switching the evaporator to the condenser, the evaporator can be defrosted quickly. On the basis of the above, the inventor also realizes that the effect of improving the defrosting speed can be achieved by only changing the defrosting mode of the evaporator, but the obvious temperature fluctuation of the storage compartment can still be caused because the cooling supply is stopped when the evaporator is defrosted. Further, when the evaporator is defrosted, if the mechanical power of the compressor cannot be fully utilized, the energy efficiency of the refrigerating and freezing apparatus is low.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to overcome at least one of the technical drawbacks of the prior art and to provide a refrigeration system for a cold storage and freezing device and a cold storage and freezing device.
A further object of the present invention is to improve a refrigeration system for a cold storage freezer in such a way that the defrosting rate is increased while at the same time significant temperature fluctuations in the storage compartment are effectively prevented.
Another further object of the present invention is to achieve an organic combination of defrosting function and cooling function, effectively utilize the mechanical work of the compressor, and improve the energy efficiency of the refrigeration system and the refrigerating and freezing apparatus.
A further object of the utility model is to flexibly adjust the operating states of two evaporators connected in series.
It is yet a further object of the present invention to simplify the construction of the refrigeration system and reduce manufacturing costs.
In particular, according to an aspect of the present invention, there is provided a refrigeration system for a refrigeration chiller comprising: the refrigeration assembly is provided with a compressor, a first evaporator and a second evaporator which are sequentially connected in series to form a refrigeration circuit; wherein a first flow pipe for circulating refrigerant is formed inside the second evaporator; the first bypass cooling pipeline is connected to the refrigeration loop and is communicated with the outlet of the first evaporator and the first flow pipe; the first bypass cooling supply pipeline is provided with a bypass throttling device and is used for throttling the refrigerant flowing out of the first evaporator and flowing to the first circulation pipe by using the bypass throttling device when the first evaporator defrosts by using the refrigerant from the compressor.
Optionally, a second flow pipe for circulating the refrigerant is further formed inside the second evaporator; and the refrigeration assembly also comprises a refrigeration connecting pipe section which is arranged in the refrigeration loop, is connected with the outlet of the first evaporator and the second flow pipe and is used for guiding the refrigerant flowing out of the first evaporator to the second flow pipe when the first evaporator and the second evaporator utilize the refrigerant from the compressor for cooling.
Optionally, the refrigeration system further comprises a first switching valve connected to the outlet of the first evaporator and having a valve port communicating with the second flow passage and a valve port communicating with the inlet of the first bypass cooling line; and the first switching valve is used for opening a valve port communicated with the second flow pipe when the first evaporator and the second evaporator simultaneously provide cold energy, and opening a valve port communicated with the first bypass cold supply pipeline when the first evaporator defrosts.
Optionally, the refrigeration system further comprises: the first bypass defrosting pipeline is connected to the inlet of the first evaporator and is used for introducing the refrigerant flowing out of the compressor into the first evaporator so as to defrost the first evaporator; and a second bypass defrosting pipeline connected to an inlet of the first flow pipe of the second evaporator and used for introducing the refrigerant flowing out of the compressor into the second evaporator so as to defrost the second evaporator.
Optionally, the refrigeration assembly further comprises a condenser disposed in the refrigeration circuit and located between the compressor and the first evaporator; and the first bypass defrosting pipeline and the second bypass defrosting pipeline are also respectively connected to an exhaust port of the compressor or an outlet of the condenser so as to be convenient for introducing the refrigerant flowing out of the compressor.
Optionally, the refrigeration assembly further comprises: the third switching valve is connected to the exhaust port of the compressor and is provided with a valve port communicated with the condenser, a valve port communicated with the first bypass defrosting pipeline and a valve port communicated with the second bypass defrosting pipeline; and the third switching valve is used for opening a valve port communicated with the first bypass defrosting pipeline when the first evaporator is defrosted, opening a valve port communicated with the second bypass defrosting pipeline when the second evaporator is defrosted, and opening a valve port communicated with the condenser when the first evaporator and the second evaporator are simultaneously cooled.
Optionally, the refrigeration assembly further comprises a refrigeration throttling device, which is arranged in the refrigeration circuit, is located between the compressor and the first evaporator, and is used for throttling the refrigerant flowing to the first evaporator; and the refrigerating system also comprises a second bypass cold supply pipeline, an outlet of the first flow pipe communicated with the second evaporator and an inlet of the refrigerating throttling device, and the second bypass cold supply pipeline is used for guiding the refrigerant flowing through the second evaporator to the refrigerating throttling device when the second evaporator is defrosted so as to supply cold to the first evaporator.
Optionally, the refrigeration system further comprises: a second switching valve connected to an outlet of the first flow pipe of the second evaporator, and having a valve port for communicating a suction port of the compressor and a valve port for communicating the second bypass cooling line; and the second switching valve is used for opening a valve port for communicating the compressor when the second evaporator provides cold energy and opening a valve port for communicating the second bypass cold supply pipeline when the second evaporator defrosts.
Optionally, the refrigeration system further comprises: one end of the bypass return pipeline is communicated with an outlet of the first evaporator, and the other end of the bypass return pipeline is communicated with an air suction port of the compressor; the first switching valve is also provided with a valve port communicated with the bypass return gas pipeline; and the first switching valve is used for opening a valve port communicated with the bypass return gas pipeline when the second evaporator is defrosted.
According to another aspect of the present invention, there is also provided a refrigeration and freezing apparatus comprising: a box body, wherein a storage compartment is formed inside the box body; and a refrigeration system for a refrigeration chiller as claimed in any preceding claim; wherein the first evaporator and the second evaporator are used for providing cold energy for the storage chamber.
According to the refrigerating system for the refrigerating and freezing device and the refrigerating and freezing device, the outlet of the first evaporator and the first flow pipe of the second evaporator can be communicated by using the first bypass cold supply pipeline, the bypass throttling device is arranged on the first bypass cold supply pipeline, so that a refrigerant flowing through the first evaporator can flow through the first bypass cold supply pipeline and is throttled and then flows into the first flow pipe of the second evaporator, the refrigerant absorbs heat in the second evaporator and is evaporated, and the second evaporator realizes cold supply when the first evaporator defrosts. According to the utility model, through the structural improvement of the refrigerating system, the defrosting speed is improved, and meanwhile, the obvious temperature fluctuation of the storage chamber can be effectively prevented.
Furthermore, the refrigeration system for the refrigeration and freezing device and the refrigeration and freezing device can guide and throttle the refrigerant flowing through the defrosting evaporator and then supply the refrigerant to the other evaporator so as to cool the evaporator when one evaporator is defrosted, and the two evaporators supplement each other, so that the organic combination of the defrosting function and the cooling function is realized, the refrigeration system can effectively utilize the mechanical work of the compressor, and the refrigeration system and the refrigeration and freezing device are beneficial to improving the energy efficiency.
Furthermore, the refrigeration system for the cold storage and refrigeration device and the cold storage and refrigeration device have the advantages that the second evaporator is provided with the first flow pipe and the second flow pipe and is of a specially designed double-in double-out structure, on the basis, the connection structure of the refrigeration system is specially designed, so that the flow path of the refrigerant flowing through the second evaporator can be flexibly adjusted, the second evaporator connected in series at the downstream of the first evaporator has a good cold supply effect, the second evaporator can be interchanged with the first evaporator, and defrosting without temperature rise is realized.
Furthermore, the refrigeration system for the cold storage and refrigeration device and the cold storage and refrigeration device improve the pipeline structure of the second evaporator, and improve the connection structure of the refrigeration system by utilizing the bypass cold supply pipeline, the bypass defrosting pipeline and the switching valve, so that the evaporators connected in series can be alternately defrosted without temperature rise, the fresh-keeping performance of the cold storage and refrigeration device is improved, the structure of the refrigeration system is simplified, and the manufacturing cost is reduced.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the utility model will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a refrigeration system for a refrigerated freezer in accordance with one embodiment of the present invention;
FIG. 2 is a schematic block diagram of a refrigeration system for a refrigeration chiller according to one embodiment of the present invention;
FIG. 3 is a schematic block diagram of a refrigeration freezer apparatus according to one embodiment of the present invention;
figure 4 is a schematic perspective view of a refrigerated freezer according to one embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic block diagram of a refrigeration system 200 for a refrigerated freezer 10 according to one embodiment of the present invention. The refrigeration system 200 may generally include a refrigeration assembly 210 and a bypass assembly (e.g., a bypass cooling circuit and/or a bypass defrost circuit, described below).
Wherein the refrigeration assembly 210 is used to form a refrigeration circuit. The refrigeration system 200 utilizes a refrigeration circuit to provide cooling to the evaporator without evaporator defrosting. The bypass assembly is connected to the refrigeration circuit, for example, may be attached to the refrigeration circuit to form a bypass branch. The refrigerant circuit and the bypass branch can both circulate the refrigerant. The refrigeration system 200 adjusts the operating state of the evaporator by adjusting the flow path of the refrigerant in the refrigeration circuit and the bypass branch. The working state of the evaporator comprises a cooling state and a defrosting state.
Fig. 2 is a schematic block diagram of a refrigeration system 200 for the refrigeration freezer 10 in accordance with one embodiment of the present invention. The refrigeration unit 210 has a compressor 211, a first evaporator 212a and a second evaporator 212b, which are connected in series in this order to form a refrigeration circuit. That is, the first evaporator 212a is connected in series upstream of the second evaporator 212 b. Where directional terms such as "upstream" and "downstream" are used with respect to the flow path of the refrigerant, for example, the first evaporator 212a is located upstream of the second evaporator 212b, which means that when the refrigerant flows in the refrigeration circuit and cools the two evaporators, the refrigerant flows through the first evaporator 212a first and then flows through the second evaporator 212 b. The first evaporator 212a and the second evaporator 212b are used to provide cooling energy to the storage compartment 110 of the refrigeration and freezing apparatus 10.
A first flow pipe through which refrigerant flows is formed inside the second evaporator 212 b. The refrigerant passing through the second evaporator 212b may pass through the second evaporator 212b via a first flow pipe.
The bypass assembly includes a first bypass cooling line 230 a. The first bypass cooling line 230a is connected to the refrigeration circuit and communicates the outlet of the first evaporator 212a with the first flow line. That is, the first bypass cooling line 230a corresponds to a "connection passage" between the first evaporator 212a and the first flow tube, and may guide the refrigerant flowing through the first evaporator 212a to the second evaporator 212b when the first evaporator 212a is defrosted.
The first bypass cooling line 230a is provided with a bypass throttle device 270, and the first bypass cooling line 230a is configured to throttle the refrigerant flowing out of the first evaporator 212a and flowing to the first flow passage by the bypass throttle device 270 when the first evaporator 212a is defrosted by the refrigerant from the compressor 211. That is, the first bypass cooling line 230a can also throttle the refrigerant using the bypass throttling device 270 while guiding the refrigerant, so that the throttled refrigerant can evaporate to absorb heat while passing through the first flow tube of the second evaporator 212b, thereby cooling the second evaporator 212 b.
In the refrigeration system 200 of the embodiment, the first bypass cooling line 230a is utilized to communicate the outlet of the first evaporator 212a with the first flow pipe of the second evaporator 212b, and the first bypass cooling line 230a is provided with the bypass throttling device 270, so that the refrigerant flowing through the first evaporator 212a can flow through the first bypass cooling line 230a and is throttled and then flows into the first flow pipe of the second evaporator 212b, and the refrigerant absorbs heat and evaporates inside the second evaporator 212b, so that the second evaporator 212b realizes cooling when the first evaporator 212a defrosts. In the embodiment, the refrigeration system 200 is structurally improved, so that the defrosting rate is increased, and meanwhile, the storage compartment 110 can be effectively prevented from generating obvious temperature fluctuation.
The second evaporator 212b may be further formed inside with a second flow tube for circulating a refrigerant, in addition to the first flow tube. Each flow-through pipe has a respective inlet and outlet. That is, two passages through which the refrigerant flows are formed inside the second evaporator 212 b. The second evaporator 212b is a specially designed double tube embedded structure, i.e., a double in and double out structure. The first and second flow tubes may share fins. The first evaporator 212a may be a tube and fin heat exchanger.
The refrigeration assembly 210 further includes a refrigeration connecting pipe section 216 disposed in the refrigeration circuit and connecting an outlet of the first evaporator 212a with the second flow pipe for guiding the refrigerant flowing out of the first evaporator 212a to the second flow pipe when the first evaporator 212a and the second evaporator 212b are cooled by the refrigerant from the compressor 211. That is, the refrigeration assembly 210 realizes the series connection between the two evaporators using the refrigeration connecting pipe section 216, and the refrigerant flowing through the first evaporator 212a and used for cooling the first evaporator 212a may flow into the second flow pipe of the second evaporator 212b via the refrigeration connecting pipe section 216.
The refrigerating connecting pipe section 216 may not be provided with any throttling device, and the refrigerating connecting pipe section 216 only has a connecting function and does not throttle the refrigerant flowing to the second flow pipe again. The configuration of the refrigerant connection pipe section 216 may be the same as that of the connection piping between the respective components within the refrigerant circuit as long as the function of guiding the refrigerant can be achieved.
By connecting the second evaporator 212b with the double-inlet and double-outlet structure in series at the downstream of the first evaporator 212a, connecting the outlet of the first evaporator 212a with the second flow pipe of the second evaporator 212b by the refrigeration connecting pipe section 216, and connecting the outlet of the first evaporator 212a with the first flow pipe of the second evaporator 212b by the first bypass cooling supply pipe 230a, the second evaporator 212b can maintain good cooling effect when the first evaporator 212a is in various working states, and can supply cooling simultaneously with the first evaporator 212a or independently when the first evaporator 212a is defrosted.
The refrigeration system 200 of the present embodiment may further include a first switching valve 240 connected to an outlet of the first evaporator 212 a. The connection of the first switching valve 240 to the outlet of the first evaporator 212a means that the inlet of the first switching valve 240 is communicated with the outlet of the first evaporator 212a, and the valve port of the present embodiment and the following embodiments means the outlet of the switching valve.
The first switching valve 240 has a valve port communicating with the second flow passage and a valve port communicating with the inlet of the first bypass cooling line 230 a. That is, the refrigerant flowing from the outlet of the first evaporator 212a to the second evaporator 212b has two flow paths, one flowing into the second evaporator 212b via the refrigerant connecting pipe section 216 and the other flowing into the second evaporator 212b via the first bypass cooling pipe 230 a. The first switching valve 240 can adjust the flow path of the refrigerant flowing to the second evaporator 212b by opening and closing the valve port, thereby adjusting the operating state of the second evaporator 212 b. The first switching valve 240 may be disposed in the storage compartment 110.
The first switching valve 240 is used to open a valve port communicating with the second flow pipe when the first evaporator 212a and the second evaporator 212b simultaneously provide cooling capacity, so as to allow the refrigerant flowing through the first evaporator 212a and used to cool the first evaporator 212a to directly flow into the second evaporator 212b, thereby enabling the second evaporator 212b to exert a good cooling effect. The first switching valve 240 is further configured to open a valve port communicating with the first bypass cooling line 230a when the first evaporator 212a defrosts, so as to allow the refrigerant flowing through the first evaporator 212a and used for defrosting the first evaporator 212a to be throttled before flowing into the second evaporator 212b, thereby enabling the second evaporator 212b to perform a cooling function.
By arranging the switching valve in the refrigeration system 200 and adjusting the flow path of the refrigerant flowing to the evaporator by using the switching valve, the operating state of the evaporator can be switched easily, the method is simple, and the structure is simple.
The bypass assembly may further include a bypass defrost line connected to the refrigeration circuit and adapted to pass refrigerant from the compressor 211 to the evaporator to defrost the evaporator.
The bypass defrosting line may include a first bypass defrosting line 220a corresponding to the first evaporator 212a and a second bypass defrosting line 220b corresponding to the second evaporator 212 b. The first bypass defrosting pipe 220a is connected to an inlet of the first evaporator 212a, and is used for introducing the refrigerant flowing out of the compressor 211 into the first evaporator 212a to defrost the first evaporator 212 a. The second bypass defrosting pipe 220b is connected to an inlet of the first flow pipe of the second evaporator 212b, and serves to introduce the refrigerant flowing out of the compressor 211 to the second evaporator 212b to defrost the second evaporator 212 b. For example, each bypass defrosting pipe is also connected to the exhaust port of the compressor 211, so that the high-pressure refrigerant flowing out of the compressor 211 can be introduced into each evaporator through each bypass defrosting pipe. The construction of the bypass defrost line may be the same as the construction of the connecting lines between the various components within the refrigeration circuit.
The refrigeration system 200 is configured to provide cooling energy using one evaporator while defrosting the other evaporator using a bypass defrosting line to prevent temperature fluctuations in the storage compartment 110. That is, the refrigeration system 200 prevents the two bypass defrosting pipes from being simultaneously communicated, prevents the two evaporators from being simultaneously defrosted, and allows one evaporator to be defrosted and the other evaporator to be used for cooling.
Because the refrigeration system 200 can directly guide the refrigerant from the compressor 211 to the evaporator by using the bypass defrosting pipe to defrost the evaporator, the evaporator can defrost from inside to outside by means of the heat generated by the evaporator, which is beneficial to improving the defrosting speed of the evaporator and shortening the defrosting period, and because the refrigeration system 200 is configured to provide cold energy by using another evaporator when one evaporator is defrosted, which is beneficial to preventing the storage compartment 110 from generating obvious temperature rise due to defrosting of the evaporator, which is beneficial to improving the fresh-keeping performance of the refrigeration and freezing device 10.
The refrigeration assembly 210 may further include a refrigeration throttling device 214 disposed in the refrigeration circuit between the compressor 211 and the first evaporator 212a, for example, between an outlet of a condenser 213, described below, and the first evaporator 212a, for throttling the flow of refrigerant to the first evaporator 212 a. The refrigerant flowing into the first evaporator 212a is throttled by the refrigeration throttle device 214, and the throttled refrigerant can be evaporated in the first evaporator 212a by heat absorption, so that the first evaporator 212a can be cooled.
The bypass assembly may further include a second bypass cooling line 230b, an outlet of the first flow pipe communicating with the second evaporator 212b, and an inlet of the refrigeration throttling device 214, for guiding the refrigerant flowing through the second evaporator 212b to the refrigeration throttling device 214 when the second evaporator 212b defrosts, so as to cool the first evaporator 212 a. That is, the second bypass cooling line 230b corresponds to a "connection passage" between the second evaporator 212b and the first evaporator 212a, and by using the second bypass cooling line 230b in combination with the refrigeration throttling device 214, the refrigerant flowing through the second evaporator 212b can be guided to the first evaporator 212a when the second evaporator 212b defrosts, so that the first evaporator 212a cools.
In the refrigeration system 200 of the present embodiment, when one evaporator defrosts, since the refrigerant flowing through the defrosting evaporator can be guided and throttled and then supplied to the other evaporator to cool the evaporator, the two evaporators supplement each other, so that the defrosting function and the cooling function are organically combined, which enables the refrigeration system 200 of the present embodiment to effectively utilize the mechanical work of the compressor 211, and is beneficial to improving the energy efficiency of the refrigeration system 200 and the refrigeration and freezing device 10.
Because the second evaporator 212b has the first flow pipe and the second flow pipe and is a specially designed double-in double-out structure, on the basis, the refrigerant flow path passing through the second evaporator 212b can be flexibly adjusted by specially designing the connection structure of the refrigeration system 200, so that the second evaporator 212b connected in series at the downstream of the first evaporator 212a has good cooling effect and can exchange functions with the first evaporator 212a, and defrosting without temperature rise is realized.
The refrigeration system 200 may further include a second switching valve 250 connected to an outlet of the first flow pipe of the second evaporator 212b, i.e., an inlet of the second switching valve 250 communicates with an outlet of the first flow pipe. The second switching valve 250 has a valve port for communicating the suction port of the compressor 211, i.e., the refrigerant flowing out of the valve port may flow toward the suction port of the compressor 211. The second switching valve 250 also has a valve port for communicating the second bypass cooling line 230b, i.e., the refrigerant flowing out of the valve port can flow into the second bypass cooling line 230 b. The second switching valve 250 may be a three-way valve, such as a three-way solenoid valve. In some embodiments, the second switching valve 250 may be disposed in the storage compartment 110.
The two ports of the second switching valve 250 are not opened simultaneously. The second switching valve 250 is configured to open a valve port for communicating with the compressor 211 when the second evaporator 212b provides cooling capacity, so as to allow the refrigerant to flow back to the suction port of the compressor 211, and open a valve port for communicating with the second bypass cooling pipe 230b when the second evaporator 212b defrosts, so as to allow the refrigerant to flow through the first evaporator 212a and absorb heat for evaporation.
The bypass assembly may further include a bypass return line 280 having one end connected to the outlet of the first evaporator 212a and the other end connected to the suction port of the compressor 211. That is, the bypass circuit 280 may serve as a connection passage between the outlet of the first evaporator 212a and the suction port of the compressor 211, and the refrigerant flowing out of the first evaporator 212a may directly flow back to the compressor 211 via the bypass circuit 280.
Accordingly, since the first switching valve 240 is connected to the outlet of the first evaporator 212a, the first switching valve 240 may be further formed with a valve port communicating with the bypass return pipe 280. That is, the first switching valve 240 of the present embodiment may have three ports, and may be a four-way solenoid valve, for example. The first switching valve 240 is also used to open a valve port communicating with the bypass return line 280 when the second evaporator 212b defrosts. Since the first evaporator 212a is in a cooling state when the second evaporator 212b is defrosted, the first switching valve 240 is used to communicate the outlet of the first evaporator 212a with the bypass return line 280, so that the refrigerant flowing out of the first evaporator 212a can be directly guided to the compressor 211, thereby completing the refrigeration-defrosting cycle.
The refrigeration assembly 210 may further include a condenser 213 disposed in the refrigeration circuit between the compressor 211 and the first evaporator 212a, such as between a discharge port of the compressor 211 and a refrigeration restriction 214. The first and second bypass frost lines 220a and 220b are also connected to the discharge port of the compressor 211 or the outlet of the condenser 213, respectively, so as to introduce the refrigerant flowing out of the compressor 211. For example, each bypass defrosting line may be connected to an exhaust port of the compressor 211, and the refrigerant flowing out of the compressor 211 may be directly introduced into the defrosting evaporator via the bypass defrosting line, which is advantageous to further increase the defrosting rate of the evaporator.
The refrigeration system 200 may further include a third switching valve 260 connected to a discharge port of the compressor 211, i.e., an inlet of the third switching valve 260 communicates with a discharge port of the compressor 211. And has a valve port communicating with the condenser 213, a valve port communicating with the first bypass defrosting pipe 220a, and a valve port communicating with the second bypass defrosting pipe 220 b. That is, one of the ports of the third switching valve 260 communicates with the outlet of the condenser 213, and the other two ports communicate with a bypass defrosting pipe, respectively. The third switching valve 260 may be a four-way valve, such as a four-way solenoid valve. The third switching valve 260 may be provided in the press compartment of the refrigerating and freezing apparatus 10.
The third switching valve 260 is used to open a valve port communicating with the first bypass frost line 220a when the first evaporator 212a is defrosted to allow the refrigerant flowing out of the compressor 211 to directly flow into the first evaporator 212a, thereby allowing the first evaporator 212a to be defrosted with the high pressure refrigerant. The third switching valve 260 also serves to open a valve port communicating with the second bypass defrosting pipe 220b when the second evaporator 212b is defrosted to allow the refrigerant flowing out of the compressor 211 to directly flow into the second evaporator 212b, thereby allowing the second evaporator 212b to be defrosted with the refrigerant of high pressure. The third switching valve 260 also serves to open the valve port communicating with the condenser 213 when the first and second evaporators 212a and 212b are simultaneously supplied with cold, to allow the refrigerant flowing out of the compressor 211 to flow through the condenser 213, the refrigeration throttle device 214, the first and second evaporators 212a and 212b in order.
By arranging a bypass cooling pipe at the outlet of each evaporator and adjusting the flow path of the refrigerant flowing into and out of each evaporator by using the first switching valve 240, the second switching valve 250, and the third switching valve 260, "defrosting and cooling are both achieved", and at the same time, the mechanical work of the compressor 211 can be effectively utilized, which has the advantage of a delicate structure.
The control process of the refrigeration system 200 will be described in detail below by taking the case where the first evaporator 212a is defrosted as an example. When the first evaporator 212a defrosts, the third switching valve 260 opens the valve port communicated with the first bypass defrosting pipeline 220a and closes the other valve ports, the first switching valve 240 opens the valve port communicated with the first bypass cooling supply pipeline 230a and closes the other valve ports, and the second switching valve 250 opens the valve port communicated with the suction port of the compressor 211 and closes the other valve ports, so that the refrigerant flowing through flows back to the compressor 211, thereby completing the whole refrigeration-defrosting cycle.
When the second evaporator 212b defrosts, the third switching valve 260 opens the valve port communicated with the second bypass defrosting pipeline 220b and closes the other valve ports, the second switching valve 250 opens the valve port communicated with the second bypass cooling supply pipeline 230b and closes the other valve ports, and the first switching valve 240 opens the valve port communicated with the bypass air return pipeline 280 and closes the other valve ports, so that the refrigerant flowing through flows back to the compressor 211, thereby completing the whole refrigeration-defrosting cycle.
In the refrigeration system 200 of the embodiment, the pipeline structure of the second evaporator 212b is improved, and the bypass cold supply pipeline, the bypass defrosting pipeline and the switching valve are used to improve the connection structure of the refrigeration system 200, so that the evaporators connected in series can be defrosted in turn without temperature rise, the fresh-keeping performance of the refrigeration and freezing device 10 is improved, which is beneficial to simplifying the structure of the refrigeration system 200 and reducing the manufacturing cost.
In this embodiment, the refrigeration assembly 210 may further include a liquid storage bag 215 disposed in the refrigeration circuit, for example, between the outlet of the second evaporator 212b and the suction port of the compressor 211, for adjusting the amount of refrigerant required by each component of the refrigeration assembly 210.
Fig. 3 is a schematic block diagram of a refrigeration freezer 10 according to one embodiment of the utility model. The refrigeration freezer 10 may generally include a cabinet 100 and a refrigeration system 200 of any of the embodiments described above.
A storage compartment 110 is formed inside the case 100. The first evaporator 212a and the second evaporator 212b of the refrigeration system 200 are used to provide cooling energy to the storage compartment 110. Storage compartment 110 may be one. The temperature zone of the storage compartment 110 may be set according to actual needs, for example, the storage compartment 110 may be any one of a refrigerating compartment, a freezing compartment, a deep cooling compartment, or a temperature changing compartment. The first evaporator 212a and the second evaporator 212b are used to provide cooling energy to the storage compartment 110.
Fig. 4 is a schematic perspective view of a refrigerated freezer 10 according to one embodiment of the present invention.
In some alternative embodiments, there may be a plurality of storage compartments 110, for example two. The cooling energy provided by the two evaporators of the refrigeration system 200 can be supplied to the same storage compartment 110, such as a freezer compartment. In some alternative embodiments, in the case of supplying cold to the same storage compartment 110, the cold provided by the two evaporators of the refrigeration system 200 may also be transferred to other storage compartments 110, such as a refrigerating compartment, through the air supply duct, so as to realize cold sharing among multiple storage compartments 110. In further alternative embodiments, each evaporator corresponds to one storage compartment 110, and the two evaporators can supply cold to the respective storage compartments 110, or can simultaneously supply cold to the two storage compartments 110 by using the other evaporator when one evaporator defrosts.
In some alternative embodiments, the interior of the cabinet 100 is further formed with a mounting space 120 for mounting an evaporator. The installation space 120 may be located at one side, such as a lower side or a rear side, of the storage compartment 110. The refrigerating and freezing apparatus 10 may further include a thermal insulation partition 130 disposed in the installation space 120 and dividing the installation space 120 into two sub-spaces. The subspaces may be arranged in a left-to-right or one-to-one manner, so that the evaporators may be arranged in parallel or stacked up and down, which may save the installation space 120 of the evaporators, improve the space utilization, and improve the aesthetic measure.
Each subspace is respectively used for installing an evaporator to reduce heat exchange between the evaporators, so that the heat generated by the defrosting evaporator can be prevented from influencing the cooling effect of the other evaporator.
Two air supply channels are formed in the box body 100 and correspond to the evaporators one by one, and each air supply channel is used for conveying the cold energy provided by the corresponding evaporator to the storage compartment 110. Each air supply air channel is arranged independently, so that airflow turbulence can be avoided, the cold quantity conveying efficiency is ensured, and the fresh-keeping effect of the storage compartment 110 is improved. And is
Correspondingly, the refrigerating and freezing device 10 may further include two fans 150, which are disposed in one-to-one correspondence with the evaporators, and are used for promoting the formation of heat exchange air flow flowing through the corresponding air supply duct and the storage compartment 110 when the corresponding evaporators provide cooling capacity. The fan 150 may be turned on only when the corresponding evaporator is cooling. And the fan 150 can prevent the heat generated when the evaporator is defrosted from entering the storage compartment 110 by adopting a shielding means of the fan 150. In some alternative embodiments, the number of the fans 150 may be changed to one, and the fans 150 may be disposed on a common flow path between the two supply air ducts and the storage compartment 110, so that the fans 150 may simultaneously serve as an air flow actuating device for the two supply air ducts, which is advantageous for further simplifying the structure of the refrigeration and freezing apparatus 10.
In the refrigeration system 200 for the cold storage and refrigeration device 10 and the cold storage and refrigeration device 10 of the present embodiment, the first bypass cooling line 230a is utilized to communicate the outlet of the first evaporator 212a with the first flow pipe of the second evaporator 212b, and the bypass throttling device 270 is disposed on the first bypass cooling line 230a, so that the refrigerant flowing through the first evaporator 212a can flow through the first bypass cooling line 230a and is throttled and then flows into the first flow pipe of the second evaporator 212b, and the refrigerant absorbs heat and evaporates inside the second evaporator 212b, so that the second evaporator 212b realizes cooling when the first evaporator 212a defrosts. According to the utility model, through the structural improvement of the refrigerating system 200, the defrosting rate is improved, and meanwhile, the obvious temperature fluctuation of the storage compartment 110 can be effectively prevented.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the utility model have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the utility model may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the utility model. Accordingly, the scope of the utility model should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A refrigeration system for a refrigeration chiller comprising:
the refrigeration assembly is provided with a compressor, a first evaporator and a second evaporator which are sequentially connected in series to form a refrigeration circuit; wherein a first flow pipe for circulating refrigerant is formed inside the second evaporator; and
a first bypass cooling line connected to the refrigeration circuit and communicating an outlet of the first evaporator with the first flow pipe; the first bypass cooling supply pipeline is provided with a bypass throttling device, and the first bypass cooling supply pipeline is used for utilizing the bypass throttling device to throttle the refrigerant flowing out of the first evaporator and flowing to the first flow pipe when the first evaporator utilizes the refrigerant from the compressor to defrost.
2. The refrigerant system as set forth in claim 1,
a second flow pipe for circulating refrigerant is formed in the second evaporator; and is
The refrigeration assembly further comprises a refrigeration connecting pipe section which is arranged in the refrigeration loop, is connected with the outlet of the first evaporator and the second flow pipe and is used for guiding the refrigerant flowing out of the first evaporator to the second flow pipe when the first evaporator and the second evaporator utilize the refrigerant from the compressor for cooling.
3. The refrigerant system as set forth in claim 2, further including:
a first switching valve connected to an outlet of the first evaporator and having a valve port communicating with the second flow pipe and a valve port communicating with an inlet of the first bypass cooling line; and is
The first switching valve is used for opening a valve port communicated with the second flow pipe when the first evaporator and the second evaporator provide cooling capacity simultaneously, and opening a valve port communicated with the first bypass cooling pipe when the first evaporator defrosts.
4. The refrigerant system as set forth in claim 1, further including:
a first bypass defrosting line connected to an inlet of the first evaporator and adapted to introduce the refrigerant flowing out of the compressor to the first evaporator to defrost the first evaporator; and
and the second bypass defrosting pipeline is connected to the inlet of the first circulation pipe of the second evaporator and is used for introducing the refrigerant flowing out of the compressor into the second evaporator so as to defrost the second evaporator.
5. The refrigerant system as set forth in claim 4,
the refrigeration assembly further comprises a condenser arranged in the refrigeration loop and located between the compressor and the first evaporator; and is
The first bypass defrosting pipeline and the second bypass defrosting pipeline are further respectively connected to an exhaust port of the compressor or an outlet of the condenser, so that the refrigerant flowing out of the compressor can be introduced.
6. The refrigerant system as set forth in claim 5, further including:
a third switching valve connected to an exhaust port of the compressor and having a valve port communicating with the condenser, a valve port communicating with the first bypass defrosting pipe, and a valve port communicating with the second bypass defrosting pipe; and is
The third switching valve is used for opening a valve port communicated with the first bypass defrosting pipeline when the first evaporator is defrosted, opening a valve port communicated with the second bypass defrosting pipeline when the second evaporator is defrosted, and opening a valve port communicated with the condenser when the first evaporator and the second evaporator are simultaneously cooled.
7. The refrigerant system as set forth in claim 1,
the refrigeration assembly further comprises a refrigeration throttling device, the refrigeration throttling device is arranged in the refrigeration loop, is positioned between the compressor and the first evaporator and is used for throttling the refrigerant flowing to the first evaporator; and is
The refrigeration system also comprises a second bypass cooling pipeline, an outlet of the first flow pipe communicated with the second evaporator and an inlet of the refrigeration throttling device, and the second bypass cooling pipeline is used for guiding the refrigerant flowing through the second evaporator to the refrigeration throttling device when the second evaporator is defrosted so as to cool the first evaporator.
8. The refrigerant system as set forth in claim 7, further including:
a second switching valve connected to an outlet of the first flow pipe of the second evaporator and having a valve port for communicating a suction port of the compressor and a valve port for communicating the second bypass cooling line; and is
The second switching valve is used for opening a valve port used for being communicated with the compressor when the second evaporator provides cold energy, and opening a valve port communicated with the second bypass cold supply pipeline when the second evaporator defrosts.
9. The refrigerant system as set forth in claim 3, further including:
one end of the bypass return pipeline is communicated with the outlet of the first evaporator, and the other end of the bypass return pipeline is communicated with a gas suction port of the compressor; and is
The first switching valve is also provided with a valve port communicated with the bypass return gas pipeline; and the first switching valve is used for opening a valve port communicated with the bypass return gas pipeline when the second evaporator is defrosted.
10. A refrigeration freezer apparatus, comprising:
a box body, wherein a storage compartment is formed inside the box body; and
a refrigeration system for a cold storage freezer as claimed in any one of claims 1-9; wherein the first evaporator and the second evaporator are used for providing cold energy for the storage chamber.
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| CN202121459464.0U CN215892861U (en) | 2021-06-29 | 2021-06-29 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
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| CN202121459464.0U CN215892861U (en) | 2021-06-29 | 2021-06-29 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115540406A (en) * | 2021-06-29 | 2022-12-30 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
| WO2023273710A1 (en) * | 2021-06-29 | 2023-01-05 | 青岛海尔电冰箱有限公司 | Refrigerating and freezing device |
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2021
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115540406A (en) * | 2021-06-29 | 2022-12-30 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
| WO2023273708A1 (en) * | 2021-06-29 | 2023-01-05 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device, and refrigerating and freezing device |
| WO2023273710A1 (en) * | 2021-06-29 | 2023-01-05 | 青岛海尔电冰箱有限公司 | Refrigerating and freezing device |
| CN115540406B (en) * | 2021-06-29 | 2024-03-19 | 青岛海尔电冰箱有限公司 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
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