CN215864171U - 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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- CN215864171U CN215864171U CN202121456180.6U CN202121456180U CN215864171U CN 215864171 U CN215864171 U CN 215864171U CN 202121456180 U CN202121456180 U CN 202121456180U CN 215864171 U CN215864171 U CN 215864171U
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Abstract
The utility model provides a refrigeration system for a refrigeration and freezing device and the refrigeration and freezing device. The refrigeration system includes: a refrigeration assembly having a compressor and an evaporator for forming a refrigeration circuit; and a bypass defrosting pipe connected to the refrigerating circuit for circulating the refrigerant from the compressor to generate heat; and the bypass defrosting pipe is thermally connected with the evaporator to heat the evaporator. The utility model provides a new defrosting mode by improving the structure of the refrigerating system, and when the refrigerant from the compressor is introduced into the bypass defrosting pipe and generates heat, the evaporator can be heated so as to defrost the evaporator. Because the refrigerant from the compressor can generate a large amount of heat when flowing through the bypass defrosting pipe, the defrosting mode of the utility model can improve the defrosting speed of the evaporator, so that the evaporator can be defrosted quickly, efficiently and thoroughly.
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
Refrigeration and freezing apparatuses, such as refrigerators, freezers, and refrigerated cabinets, utilize a refrigeration system to achieve refrigeration. In the refrigeration system, since the surface temperature of the evaporator is low during refrigeration, frost is easily formed, and the refrigeration efficiency of the evaporator is reduced, it is necessary to perform the defrosting operation in a timely manner.
In a conventional refrigeration and freezing device, an electric heating wire is generally installed at the bottom of an evaporator, ambient air of the evaporator is heated in an electric heating baking mode, and then heat of the ambient air is transferred to the evaporator to defrost. However, the defrosting mode has long defrosting period, low defrosting speed, large electricity consumption and frequent incomplete defrosting, and is difficult to defrost quickly, efficiently and thoroughly. In addition, in some other refrigerating and freezing devices, functions of an evaporator and a condenser are exchanged by adjusting a four-way switching valve, and although the evaporator can be defrosted by utilizing condensation heat release of refrigerant, the condenser is frosted or condensed at the same time, so that the overall refrigerating effect of the refrigerating and freezing device is affected.
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 the structure of the refrigeration system for the refrigeration and freezing device and to provide a new defrosting method, which can increase the defrosting rate of the evaporator, so as to defrost the evaporator quickly, efficiently and thoroughly.
It is yet a further object of the present invention to reduce or avoid excessive compressor suction temperatures due to evaporator defrost.
It is another further object of the present invention to simplify the construction of the refrigeration system so that it implements a new defrosting scheme with a simplified construction and simple control logic.
According to an aspect of the present invention, there is provided a refrigeration system for a refrigeration chiller comprising: a refrigeration assembly having a compressor and an evaporator for forming a refrigeration circuit; and a bypass defrosting pipe connected to the refrigerating circuit for circulating the refrigerant from the compressor to generate heat; and the bypass defrosting pipe is thermally connected with the evaporator to heat the evaporator.
Optionally, the refrigeration assembly further comprises a condenser disposed in the refrigeration circuit and connected between the compressor and the evaporator; and the inlet of the bypass defrosting pipe is communicated with the outlet of the condenser or the exhaust port of the compressor.
Optionally, the refrigeration assembly further has a refrigeration throttling device disposed within the refrigeration circuit and connected to the inlet of the evaporator for throttling the refrigerant flowing from the condenser to the evaporator.
Optionally, the refrigeration system further comprises a switching valve connected to the outlet of the condenser and having a valve port communicating with the refrigeration throttling device and a valve port communicating with the bypass defrosting pipe; the switching valve is used for regulating the flow path of the refrigerant flowing through the switching valve by controllably opening and closing the valve port communicated with the refrigeration throttling device and the valve port communicated with the bypass defrosting pipe.
Optionally, the switching valve is used for opening a valve port communicated with the refrigeration throttling device when the evaporator provides cold energy, and is also used for opening a valve port communicated with the bypass defrosting pipe when the evaporator defrosts.
Optionally, the refrigeration assembly further has a return air pipe disposed in the refrigeration circuit and connected between the outlet of the evaporator and the suction port of the compressor.
Optionally, an outlet of the bypass defrosting pipe is communicated with the air return pipe.
Optionally, the number of evaporators is one or more; one or more bypass defrosting pipes are arranged corresponding to each evaporator one by one.
Optionally, the bypass defrosting pipe is wound on the evaporator or is arranged close to the evaporator.
According to another aspect of the present invention, there is 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 evaporator is used for providing cold energy for the storage chamber.
The refrigerating system for the refrigerating and freezing device and the refrigerating and freezing device provide a new defrosting mode by improving the structure of the refrigerating system. By additionally arranging the bypass defrosting pipe connected to the refrigerating circuit and enabling the bypass defrosting pipe to be thermally connected with the evaporator, when the refrigerant from the compressor is introduced into the bypass defrosting pipe and generates heat, the evaporator can be heated so as to defrost the evaporator. Because the refrigerant from the compressor can generate a large amount of heat when flowing through the bypass defrosting pipe, the defrosting mode of the utility model can improve the defrosting speed of the evaporator, so that the evaporator can be defrosted quickly, efficiently and thoroughly.
Further, according to the refrigeration system for the cold storage and refrigeration device and the cold storage and refrigeration device, due to the fact that the outlet of the bypass defrosting pipe is communicated with the air return pipe of the refrigeration assembly, the refrigerant flowing through the bypass defrosting pipe can flow back to the air suction port of the compressor through the air return pipe, and the phenomenon that the air suction temperature of the compressor is too high due to defrosting of the evaporator can be reduced or avoided.
Furthermore, the refrigeration system for the cold storage and refrigeration device and the cold storage and refrigeration device of the utility model have the advantages that the switching valve is arranged in the refrigeration system, one valve port of the switching valve is communicated with the refrigeration throttling device, the other valve port of the switching valve is communicated with the bypass defrosting pipe, and the working state of the evaporator can be adjusted by adjusting the opening and closing state of the valve port of the switching valve, so that the evaporator can be flexibly switched between the defrosting state and the cooling state, the structure of the refrigeration system can be simplified, and the control process of the refrigeration system can be simplified.
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 system for a refrigeration chiller according to another embodiment of the present invention;
fig. 4 is a schematic block diagram of a refrigeration system for a refrigeration chiller according to yet another embodiment of the present invention;
fig. 5 is a schematic structural view of a refrigerating and freezing apparatus according to an 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 defrost line 220.
Wherein the refrigeration assembly 210 is used to form a refrigeration circuit. The refrigeration assembly 210 has a compressor 211 and an evaporator 212 for forming a refrigeration circuit. The refrigeration system 200 utilizes a refrigeration circuit to provide cooling to the evaporator 212 without defrosting of the evaporator 212.
The bypass defrost pipe 220 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 regulates the operating state of the evaporator 212 by regulating the flow path of the refrigerant in the refrigeration circuit and the bypass branch. The operating states of the evaporator 212 include a cooling state and a defrosting state.
The bypass defrosting pipe 220 serves to circulate the refrigerant from the compressor 211 to generate heat. The bypass defrost line 220 is connected to the refrigeration circuit to pass refrigerant out of the compressor 211. For example, the inlet of the bypass defrosting pipe 220 may be connected to the discharge port of the compressor 211 through a connection pipe, or may communicate with a certain section downstream of the discharge port of the compressor 211 through a connection pipe, as long as a high-pressure or high-temperature refrigerant flowing out of the compressor 211 can be introduced. The refrigerant may be condensed while being heat-released while passing through the bypass defrosting pipe 220, thereby generating heat.
The above-described connecting line may have the same configuration as that of the connecting line between the respective components in the refrigeration circuit as long as the function of guiding the refrigerant can be achieved. The bypass defrosting pipe 220 may have substantially the same structure as the condensation pipe of the condenser 213, as long as it can condense and release heat of the high-pressure or high-temperature refrigerant flowing therethrough.
The bypass defrosting pipe 220 is thermally connected to the evaporator 212 to heat the evaporator 212. Since the bypass defrosting pipe 220 may emit a large amount of heat when the refrigerant from the compressor 211 is introduced, the heat generated by the bypass defrosting pipe 220 may be transferred to the evaporator 212 by thermally connecting the bypass defrosting pipe 220 to the evaporator 212, thereby performing an effect of heating the evaporator 212.
The present embodiment provides a new defrosting manner by improving the structure of the refrigeration system 200. By additionally arranging the bypass defrosting pipe 220 connected to the refrigerating circuit and thermally connecting the bypass defrosting pipe 220 with the evaporator 212, when the refrigerant from the compressor 211 is introduced into the bypass defrosting pipe 220 to generate heat, the evaporator 212 can be heated to defrost the evaporator 212. Since the refrigerant from the compressor 211 can generate a large amount of heat when flowing through the bypass defrosting pipe 220, the defrosting method of the present embodiment can increase the defrosting rate of the evaporator 212, so that the evaporator 212 can be defrosted rapidly, efficiently and thoroughly.
Compared with the scheme that the high-pressure or high-temperature refrigerant flowing out of the compressor 211 is directly introduced into the evaporator 212 and is switched to the condenser 213, the defrosting is performed by using the bypass defrosting pipe 220 to heat the evaporator 212, so that the evaporator 212 can be prevented from being switched to the condenser 213, and the sudden cooling or heating caused by the switching function of the evaporator 212 and the condenser 213 can be reduced or avoided, which is beneficial to prolonging the service life of the whole refrigeration system 200.
In some embodiments, the bypass defrosting pipe 220 is wound around the evaporator 212 or is disposed adjacent to the evaporator 212 to achieve thermal connection. The bypass defrosting pipe 220 is wound on the evaporator 212, so that the contact area between the bypass defrosting pipe 220 and the evaporator 212 can be increased, the heat transfer efficiency is improved, and the rapid defrosting of the evaporator 212 is facilitated. The bypass defrosting pipe 220 is arranged on the evaporator 212 in an attaching manner, so that the connecting process of thermal connection can be simplified, and the manufacturing cost can be reduced.
The refrigeration assembly 210 further has a condenser 213 disposed in the refrigeration circuit and connected between the compressor 211 and the evaporator 212. That is, when the refrigeration system 200 uses the refrigeration circuit to supply cooling, the refrigerant flowing out of the compressor 211 flows through the condenser 213 and then flows through the evaporator 212.
The inlet of the bypass defrosting pipe 220 is communicated with the outlet of the condenser 213 or the exhaust port of the compressor 211. That is, the inlet of the bypass defrosting pipe 220 may be connected to the outlet of the condenser 213 through a connection pipe section, or may be directly connected to the discharge port of the compressor 211 through a connection pipe section.
When the inlet of the bypass defrosting pipe 220 is communicated with the outlet of the condenser 213, the refrigerant flowing through the compressor 211 flows through the condenser 213 first and then flows into the bypass defrosting pipe 220, and since the refrigerant can release part of heat through condensation when flowing through the condenser 213, the refrigerant can be reduced or prevented from generating large thermal shock when flowing through the bypass defrosting pipe 220, the service life of the bypass defrosting pipe 220 can be prolonged, and the maintenance and manufacturing cost of the bypass defrosting pipe 220 can be reduced. When the inlet of the bypass defrosting pipe 220 communicates with the exhaust port of the compressor 211, since the refrigerant does not flow through the condenser 213, the refrigerant flowing out of the compressor 211 can emit more heat while flowing through the bypass defrosting pipe 220, which may further increase the defrosting rate of the evaporator 212.
The refrigeration assembly 210 also has a refrigeration throttling device 214 disposed within the refrigeration circuit and connected to the inlet of the evaporator 212 for throttling the flow of refrigerant from the condenser 213 to the evaporator 212. For example, the refrigeration throttling device 214 may be disposed between the condenser 213 and the evaporator 212, and when the refrigeration system 200 utilizes the refrigeration circuit to supply cold, the refrigerant flowing through the condenser 213 flows through the refrigeration throttling device 214 and is throttled, and then flows into the evaporator 212, so that the refrigerant is evaporated and absorbs heat in the evaporator 212.
The refrigeration system 200 may further include a switching valve 260 connected to an outlet of the condenser 213 or a discharge port of the compressor 211, i.e., an inlet of the switching valve 260 is connected to an outlet of the condenser 213 or a discharge port of the compressor 211.
The structure of the refrigeration system 200 will be further described below by taking as an example a case where the inlet of the switching valve 260 is connected to the outlet of the condenser 213. The switching valve 260 has a valve port communicating with the refrigerating throttle device 214 and a valve port communicating with the bypass defrosting pipe 220. That is, one port of the switching valve 260 communicates with the inlet of the cooling expansion device 214, and the other port communicates with the inlet of the bypass defrosting pipe 220. The valve port of this embodiment and the embodiments described below refers to the outlet of the switching valve 260.
The switching valve 260 is used to adjust the flow path of the refrigerant flowing therethrough by controllably opening and closing the valve port communicating with the cooling expansion device 214 and the valve port communicating with the bypass defrosting pipe 220. The switching valve 260 may be a three-way valve, for example, a three-way solenoid valve having one inlet and two outlets. That is, the refrigerant flowing out of the outlet of the condenser 213 has two flow paths, one of which flows into the evaporator 212 via the refrigeration throttle device 214 and the other of which flows into the bypass defrosting pipe 220. The switching valve 260 can adjust the flow path of the refrigerant flowing out of the condenser 213 by opening and closing the valve port, thereby adjusting the operating state of the evaporator 212.
The valve ports of the switching valve 260 are not opened at the same time. The switching valve 260 is used to open a valve port communicating with the refrigeration throttle device 214 when the evaporator 212 provides refrigeration to allow the refrigerant flowing out of the condenser 213 to be throttled first and then to flow into the evaporator 212, so that the evaporator 212 can perform a cooling function by absorbing heat through evaporation of the refrigerant. The switching valve 260 is also used for opening a valve port communicated with the bypass defrosting pipe 220 when the evaporator 212 defrosts, so as to allow the refrigerant flowing out of the condenser 213 to pass into the bypass defrosting pipe 220, and condense heat in the bypass defrosting pipe 220, so that the bypass defrosting pipe 220 generates heat. In the case that there are a plurality of evaporators 212, when a certain evaporator needs defrosting, the switching valve 260 may open a valve port communicating with the bypass defrosting pipe 220 thermally connected to the evaporator to be defrosted.
By arranging the switching valve 260 in the refrigeration system 200, one valve port of the switching valve 260 is communicated with the refrigeration throttling device 214, the other valve port is communicated with the bypass defrosting pipe 220, and the flow path of the refrigerant flowing out of the condenser 213 can be adjusted by adjusting the opening and closing state of the valve port of the switching valve 260, so that the working state of the evaporator 212 can be simply and conveniently switched and flexibly switched between the defrosting state and the cooling state, the structure of the refrigeration system 200 can be simplified, and the control process of the refrigeration system 200 can be simplified.
The refrigeration assembly 210 may also have a return air pipe 219 disposed within the refrigeration circuit and connected between the outlet of the evaporator 212 and the suction inlet of the compressor 211. The return pipe 219 is configured to release heat of the refrigerant flowing therethrough, thereby functioning to reduce the degree of superheat. For example, the air return pipe 219 may be disposed between the outlet of the second evaporator 212b and the reservoir 215, or between the reservoir 215 and the suction port of the compressor 211.
The outlet of the bypass defrosting pipe 220 is communicated with an air return pipe 219. That is, the refrigerant flowing through the bypass defrosting pipe 220 may flow back to the suction port of the compressor 211 through the return pipe 219, thereby completing one defrosting cycle.
Since the outlet of the bypass defrosting pipe 220 is communicated with the air return pipe 219 of the refrigerating assembly 210, the refrigerant flowing through the bypass defrosting pipe 220 can flow back to the suction port of the compressor 211 through the air return pipe 219, which can reduce or avoid overhigh suction temperature of the compressor 211 caused by defrosting of the evaporator 212. The air return pipe 219 of this embodiment is also communicated with the outlet of the evaporator 212.
In some alternative embodiments, the air return pipe 219 may not be connected to the outlet of the evaporator 212, for example, only the outlet of the bypass defrosting pipe 220 and the suction port of the compressor 211 may be connected, so that only the refrigerant flowing through the bypass defrosting pipe 220 may pass through. The air return pipe 219 can also be thermally connected to the evaporator 212, and since the refrigerant can also condense and release heat when flowing through the air return pipe 219, the evaporator 212 can also be heated by using the air return pipe 219, which is beneficial to further increasing the defrosting rate of the evaporator 212.
In the above embodiment, the number of the evaporators 212 may be one or more. For example, the number of the evaporators 212 may be plural. Correspondingly, the number of the bypass defrosting pipes 220 may also be one or more, and the bypass defrosting pipes are arranged in one-to-one correspondence to each evaporator 212, that is, the number of the bypass defrosting pipes 220 is the same as that of the evaporators 212, one evaporator 212 corresponds to one bypass defrosting pipe 220, and each evaporator 212 is respectively in thermal connection with the corresponding bypass defrosting pipe 220, so that each evaporator 212 can utilize the corresponding bypass defrosting pipe 220 to defrost.
Fig. 3 is a schematic diagram of a refrigeration system 200 for the refrigerated freezer 10 according to another embodiment of the present invention. The number of evaporators in this embodiment is two, and the first evaporator 212a and the second evaporator 212b are provided. It should be noted that the present embodiment is only exemplified by the case that there are two evaporators, and those skilled in the art should easily expand the number and connection manner of the evaporators based on the understanding of the present embodiment, and the number and connection manner of the evaporators are not shown one by one here.
The number of the bypass defrosting pipes 220 is two, and the two bypass defrosting pipes are a first bypass defrosting pipe 220a corresponding to the first evaporator 212a and a second bypass defrosting pipe 220b corresponding to the second evaporator 212 b. Within the refrigeration circuit, the first evaporator 212a may be connected in series upstream of the second evaporator 212 b. The terms "upstream" and "downstream" refer to the flow path of the refrigerant, and the first evaporator 212a is located upstream of the second evaporator 212b, which means that the refrigerant flows through the first evaporator 212a and then the second evaporator 212b when flowing through the refrigeration circuit.
The refrigeration system 200 of the embodiment may further include a bypass cooling line having a first bypass cooling line 230a and a second bypass cooling line 230b, wherein the first bypass cooling line 230a is communicated with the first bypass defrosting pipe 220a and is used for guiding the refrigerant flowing through the first bypass defrosting pipe 220a to the second evaporator 212b so as to enable the second evaporator 212b to generate cooling capacity, and the second bypass cooling line 230b is communicated with the second bypass defrosting pipe 220b and is used for guiding the refrigerant flowing through the second bypass defrosting pipe 220b to the first evaporator 212a so as to enable the first evaporator 212a to generate cooling capacity.
The first bypass cooling line 230a is connected to an inlet of the second evaporator 212b, and a first bypass throttling device 270a is provided on the first bypass cooling line 230a for throttling the refrigerant flowing to the second evaporator 212 b. The first bypass cooling line 230a is used to throttle the refrigerant flowing out of the first bypass defrosting pipe 220a and flowing to the second evaporator 212b by the first bypass throttling device 270a when the first evaporator 212a is defrosted by the heat generated by the first bypass defrosting pipe 220 a. That is, the first bypass cooling line 230a can also throttle the refrigerant using the first bypass throttling device 270a while directing the refrigerant, such that the throttled refrigerant can evaporate absorbing heat as it flows through the second evaporator 212b, thereby cooling the second evaporator 212 b.
The second bypass cooling line 230b is connected to an inlet of the first evaporator 212a, and a second bypass throttling device 270b is provided on the second bypass cooling line 230b for throttling the refrigerant flowing to the first evaporator 212 a. The second bypass cooling line 230b is used to throttle the refrigerant flowing out of the second bypass defrosting pipe 220b and flowing to the first evaporator 212a by the second bypass throttling device 270b when the second evaporator 212b is defrosted by the heat generated by the second bypass defrosting pipe 220 b. That is, the second bypass cooling line 230b can also throttle the refrigerant using the second bypass throttling device 270b while guiding the refrigerant, so that the throttled refrigerant can evaporate to absorb heat while flowing through the first evaporator 212a, thereby cooling the first evaporator 212 a.
With the refrigeration system 200 of the present embodiment, when an evaporator defrosts, since the refrigerant flowing through the bypass defrosting pipe 220 heating the evaporator can be guided and throttled and then supplied to another evaporator, so as to cool the other evaporator, the two evaporators supplement each other, and the organic combination of the defrosting function and the cooling function is realized, so that the refrigeration system 200 of the present embodiment can effectively utilize the mechanical work of the compressor 211, which is beneficial to improving the energy efficiency of the refrigeration system 200 and the refrigeration and freezing apparatus 10.
The refrigeration system 200 of the present embodiment may further include a bypass return line 280 for communicating the outlet of the first evaporator 212a with the suction port of the compressor 211 and guiding the refrigerant passing through the second bypass cooling line 230b and the first evaporator 212a to the suction port of the compressor 211 when the second bypass defrosting pipe 220b heats the second evaporator 212 b. That is, the refrigerant flowing out of the first evaporator 212a may directly flow back to the compressor 211 via the bypass return line 280. For example, when the second evaporator 212b is defrosted, the first evaporator 212a provides cooling energy by using the refrigerant flowing through the second bypass defrosting pipe 220b and flowing to the first evaporator 212a through the second bypass cooling line 230 b. The bypass return line 280 may guide the refrigerant flowing out of the first evaporator 212a to a suction port of the compressor 211 when the second evaporator 212b is defrosted, thereby completing a refrigeration-defrosting cycle.
For the sake of distinction, the switching valve mentioned in the above embodiment may be named as the second switching valve 260. The refrigeration system 200 may further include a first switching valve 240 connected to an outlet of the first evaporator 212a, i.e., an inlet of the first switching valve 240 is connected to an outlet of the first evaporator 212 a. The first switching valve 240 has a valve port communicating with the second evaporator 212b (i.e., the refrigerant flowing out of the valve port can flow to the inlet of the second evaporator 212 b), and a valve port communicating with the bypass return pipe 280 (i.e., the refrigerant flowing out of the valve port can flow to the bypass return pipe 280). The first switching valve 240 may be a three-way valve, such as a three-way solenoid valve. The first switching valve 240 may be disposed in the storage compartment 110.
The two ports of the first switching valve 240 are not opened simultaneously. The first switching valve 240 is used to open a valve port of the bypass return line 280 when the second bypass defrosting pipe 220b heats the second evaporator 212b by using the generated heat, so that the refrigerant flows back to the suction port of the compressor 211, and open a valve port of the second evaporator 212b when the first evaporator 212a and the second evaporator 212b simultaneously provide cooling energy, so that the refrigerant flows through the second evaporator 212b and absorbs heat to evaporate.
The first evaporator 212a and the second evaporator 212b of the present embodiment may be connected in series to the downstream of the discharge port of the compressor 211 in sequence. The refrigeration assembly 210 may also include a refrigeration throttle 214 and a condenser 213. Wherein a refrigeration throttling device 214 is disposed within the refrigeration circuit upstream of the first evaporator 212a and is used to throttle the refrigerant flow to the first evaporator 212 a. The condenser 213 is connected between the discharge port of the compressor 211 and the refrigeration throttle device 214. That is, the compressor 211, the condenser 213, the refrigerating throttle device 214, the first evaporator 212a, and the second evaporator 212b in this embodiment are connected in series in this order to form a refrigerating circuit. In some embodiments, the second bypass cooling line 230b may be switched to be connected to the inlet of the refrigeration throttling device 214, and in this case, the bypass throttling device may not be disposed on the second bypass cooling line 230b, and one throttling device may be omitted, thereby simplifying the structure of the refrigeration system 200.
The second switching valve 260 in the above embodiment may have a new valve port. For example, the second switching valve 260 may be connected to a discharge port of the compressor 211, i.e., an inlet of the second switching valve 260 is connected to a discharge port of the compressor 211. Specifically, the second switching valve 260 has a valve port communicating with the condenser 213 (i.e., the refrigerant flowing out of the valve port may flow to the condenser 213), a valve port communicating with the first bypass frost pipe 220a (i.e., the refrigerant flowing out of the valve port may flow to the first bypass frost pipe 220a), and a valve port communicating with the second bypass frost pipe 220b (i.e., the refrigerant flowing out of the valve port may flow to the second bypass frost pipe 220 b). The second switching valve 260 may be a four-way valve, such as a four-way solenoid valve. The second switching valve 260 may be disposed within the press cabin.
The three ports of the second switching valve 260 are not opened simultaneously. The second switching valve 260 is used for opening a valve port communicated with the condenser 213 when the first evaporator 212a and the second evaporator 212b simultaneously provide cooling capacity, so as to allow the refrigerant flowing out of the compressor 211 to sequentially flow through the condenser 213, the refrigeration throttling device 214, the first evaporator 212a and the second evaporator 212 b; opening a valve port communicating with the first bypass frost pipe 220a when the first bypass frost pipe 220a heats the first evaporator 212a using the generated heat to allow the refrigerant flowing out of the compressor 211 to directly flow into the first bypass frost pipe 220a, thereby defrosting the first evaporator 212a using the heat generated by the first bypass frost pipe 220 a; when the second bypass defrosting pipe 220b heats the second evaporator 212b using the generated heat, a valve port communicated with the second bypass defrosting pipe 220b is opened to allow the refrigerant flowing out of the compressor 211 to directly flow into the second bypass defrosting pipe 220b, so that the second evaporator 212b is defrosted using the heat generated by the second bypass defrosting pipe 220 b.
By additionally arranging the bypass defrosting pipe 220 in the refrigeration system 200, arranging a bypass cooling pipeline at the outlet of each evaporator, and adjusting the flow paths of the refrigerant in the refrigeration loop and the bypass branch by using the first switching valve 240 and the second switching valve 260, the refrigeration system can realize 'defrosting and cooling without errors', can effectively utilize the mechanical work of the compressor 211, and has the advantage of exquisite structure.
In the refrigeration system 200 of the embodiment, the bypass defrosting pipe 220, the bypass cooling 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 without temperature rise in turn, the freshness keeping performance of the refrigeration and freezing device 10 is improved, the structure of the refrigeration system 200 is simplified, and the control process of the refrigeration system 200 is simplified.
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.
In alternative embodiments, the structure of the refrigeration assembly 210, and the structure and connection of the bypass cooling circuit, may be altered for the refrigeration system 200 shown in fig. 3. Fig. 4 is a schematic block diagram of a refrigeration system 200 for a refrigeration freezer 10 according to yet another embodiment of the present invention.
In this embodiment, neither the first bypass cooling line 230a nor the first bypass cooling line 230a may be provided with a bypass throttling device. In the refrigeration assembly 210, the original refrigeration throttling device 214 can be used as the refrigeration throttling device 214 corresponding to the first evaporator 212a, and the refrigeration throttling device 214 is connected with the first evaporator 212a in series to form a first refrigeration branch. The refrigeration assembly 210 may further add a refrigeration throttling device 214 corresponding to the second evaporator 212b, and the refrigeration throttling device 214 is connected in parallel with the first refrigeration branch and corresponds to the second evaporator 212 b.
The outlet of first bypass cooling line 230a may be switched to communicate with the inlet of refrigeration restriction 214 corresponding to second evaporator 212 b. The outlet of the second bypass cooling line 230b may be switched to communicate with the inlet of the refrigeration restriction 214 corresponding to the first evaporator 212 a. Accordingly, the refrigeration system 200 may further include a third switching valve 250, and the third switching valve 250 may be a two-in and two-out solenoid valve, i.e., having two inlets and two outlets. For example, the third switching valve 250 may have an inlet connected to the outlet of the condenser 213 and an inlet connected to the outlet of the second bypass cooling line 230 b. Two outlets of the third switching valve 250 are respectively communicated with the two refrigeration throttling devices 214 one by one. The third switching valve 250 may be disposed in the storage compartment 110.
When the first evaporator 212a and the second evaporator 212b simultaneously supply the refrigeration capacity, the third switching valve 250 opens the inlet connected to the outlet of the condenser 213, and the second switching valve 260 opens at least one outlet communicating with the at least one refrigeration throttle device 214; the first switching valve 240 opens a valve port communicating with the second evaporator 212 b. When the first evaporator 212a defrosts, the second switching valve 260 opens the valve port communicated with the first bypass defrosting pipe 220a and closes the other valve ports, all the inlets and all the outlets of the third switching valve 250 are closed, and the first switching valve 240 opens the valve port communicated with the second evaporator 212 b. When the second evaporator 212b defrosts, the second switching valve 260 opens the valve port communicated with the second bypass defrosting pipe 220b and closes the other valve ports, the third switching valve 250 opens the inlet connected to the second bypass cooling supply pipeline 230b and opens the outlet communicated with the refrigeration throttling device 214 corresponding to the first evaporator 212a, and the first switching valve 240 opens the valve port communicated with the bypass return air pipeline 280 and closes the other valve ports.
By improving the structures of the refrigeration circuit and the bypass branch and using the third switching valve 250 to adjust the flow path of the refrigerant, the refrigeration effects of the first evaporator 212a and the second evaporator 212b can be flexibly adjusted, and the structure of the bypass cooling pipeline can be simplified, so that a bypass throttling device can be omitted for each bypass cooling pipeline.
In still other alternative embodiments, the number of refrigeration circuits may be varied. For example, the refrigeration assembly may be augmented with a refrigeration circuit. That is, the number of the refrigeration circuits in the present embodiment is two, and the two refrigeration circuits are the first refrigeration circuit and the second refrigeration circuit, respectively. Wherein, a first compressor, a first condenser, a first throttling device and a first evaporator which are connected in series in sequence are arranged in the first refrigeration loop. And a second compressor, a second condenser, a second throttling device and a second evaporator which are sequentially connected in series are arranged in the second refrigeration loop. And a condensation heating pipe can be arranged in the second refrigeration loop and is connected between the condenser and the second throttling device. And the condensation heating pipe is thermally connected with the first evaporator so as to heat the first evaporator when the first evaporator needs defrosting. The first condenser is thermally coupled to the second evaporator to heat the second evaporator when the second evaporator requires defrosting.
Fig. 5 is a schematic configuration diagram of a refrigerating and freezing apparatus 10 according to an embodiment of the present invention, in which fig. (a) is a side view and fig. (b) is a front view, and the arrangement directions of evaporators in fig. (a) and (b) are slightly different.
The refrigeration freezer 10 may generally include a cabinet 100 and a refrigeration system 200 of any of the embodiments described above. Evaporator 212 of refrigeration system 200 is used to provide cooling energy to storage compartment 110.
A storage compartment 110 is formed inside the case 100. Evaporator 212 of refrigeration system 200 is used to provide cooling energy to 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 evaporator is used to provide cold to the storage compartment 110.
The storage compartment 110 of the present embodiment may be a plurality of compartments, for example, two compartments. The two storage compartments 110 may be arranged in parallel right and left or stacked up and down. The number of evaporators of the refrigeration system is two, and the first evaporator 212a and the second evaporator 212b are provided. Each storage compartment 110 is correspondingly provided with an evaporator. Each evaporator may be disposed at a rear side or a lower side of the corresponding storage compartment 110. Each evaporator is used for providing cold energy for the corresponding storage compartment 110, and cold energy can be provided for the other storage compartment 110 through the air supply duct, so that cold energy sharing is realized.
The refrigeration system 200 for the cold storage and refrigeration device 10 and the cold storage and refrigeration device 10 of the utility model provide a new defrosting mode by improving the structure of the refrigeration system 200. By additionally arranging the bypass defrosting pipe 220 connected to the refrigerating circuit and thermally connecting the bypass defrosting pipe 220 with the evaporator 212, when the refrigerant from the compressor 211 is introduced into the bypass defrosting pipe 220 to generate heat, the evaporator 212 can be heated to defrost the evaporator 212. Because the refrigerant from the compressor 211 can generate a large amount of heat when flowing through the bypass defrosting pipe 220, the defrosting mode of the utility model can improve the defrosting rate of the evaporator 212, so that the evaporator 212 can be defrosted rapidly, efficiently and thoroughly.
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:
a refrigeration assembly having a compressor and an evaporator for forming a refrigeration circuit; and
a bypass defrosting pipe connected to the refrigerating circuit for circulating the refrigerant from the compressor to generate heat; and the bypass defrosting pipe is thermally connected with the evaporator so as to heat the evaporator.
2. The refrigerant system as set forth in claim 1,
the refrigeration assembly is also provided with a condenser which is arranged in the refrigeration loop and is connected between the compressor and the evaporator; and is
And the inlet of the bypass defrosting pipe is communicated with the outlet of the condenser or the exhaust port of the compressor.
3. The refrigerant system as set forth in claim 2,
the refrigeration assembly also has a refrigeration throttling device disposed in the refrigeration circuit and connected to the inlet of the evaporator for throttling the refrigerant flowing from the condenser to the evaporator.
4. The refrigerant system as set forth in claim 3,
the refrigeration system also comprises a switching valve which is connected to the outlet of the condenser and is provided with a valve port communicated with the refrigeration throttling device and a valve port communicated with the bypass defrosting pipe; the switching valve is used for regulating the flow path of the refrigerant flowing through the switching valve by opening and closing the valve port communicated with the refrigeration throttling device and the valve port communicated with the bypass defrosting pipe in a controlled manner.
5. The refrigerant system as set forth in claim 4,
the switching valve is used for opening a valve port communicated with the refrigeration throttling device when the evaporator provides cold energy, and is also used for opening a valve port communicated with the bypass defrosting pipe when the evaporator defrosts.
6. The refrigerant system as set forth in claim 1,
the refrigeration component is also provided with an air return pipe which is arranged in the refrigeration loop and is connected between the outlet of the evaporator and the air suction port of the compressor.
7. The refrigerant system as set forth in claim 6,
the outlet of the bypass defrosting pipe is communicated with the air return pipe.
8. The refrigerant system as set forth in claim 1,
the number of the evaporators is one or more;
the bypass defrosting pipe is one or more and is arranged corresponding to each evaporator one by one.
9. The refrigerant system as set forth in claim 1,
the bypass defrosting pipe is wound on the evaporator or is arranged by being attached to the evaporator.
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 evaporator is used for providing cold energy for the storage chamber.
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| CN202121456180.6U CN215864171U (en) | 2021-06-29 | 2021-06-29 | Refrigerating system for refrigerating and freezing device and refrigerating and freezing device |
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| CN202121456180.6U CN215864171U (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 |
|---|---|---|---|---|
| CN115540407A (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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115540407A (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 |
| WO2023273709A1 (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 |
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