CN217274926U - Refrigerating system and refrigerating equipment with same - Google Patents
Refrigerating system and refrigerating equipment with same Download PDFInfo
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- CN217274926U CN217274926U CN202220006569.9U CN202220006569U CN217274926U CN 217274926 U CN217274926 U CN 217274926U CN 202220006569 U CN202220006569 U CN 202220006569U CN 217274926 U CN217274926 U CN 217274926U
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Abstract
The utility model discloses a refrigerating system and have its refrigeration plant. The refrigeration system comprises a high-temperature-level refrigeration loop, a low-temperature-level refrigeration loop and a condensation evaporator, wherein the high-temperature-level refrigeration loop comprises a high-temperature-level compressor, a condenser, a first capillary tube, a first switching valve, a second capillary tube and a first evaporator which are sequentially connected to form a loop, the first switching valve is provided with a first outlet used for being connected with the second capillary tube and a second outlet used for being connected with the condensation evaporator, and the condensation evaporator is communicated with the high-temperature-level compressor; the low-temperature-stage refrigeration loop comprises a low-temperature-stage compressor, a low-temperature-stage capillary tube and a low-temperature-stage evaporator which are sequentially connected to form a loop, and the condensation evaporator is arranged between the low-temperature-stage compressor and the low-temperature-stage capillary tube. The utility model discloses a refrigerating system is applicable to the refrigeration plant who has a plurality of warm areas to saved the holistic length of capillary among the refrigerating system, practiced thrift the cost, avoid the capillary overlength to lead to the crowded problem of pipeline, reduced the space burden.
Description
Technical Field
The utility model relates to a refrigeration field, in particular to refrigerating system and have its refrigeration plant.
Background
When the refrigeration equipment has a temperature zone with low required temperature, for example, the refrigeration equipment has a temperature zone for realizing quick-freezing function, a quick-freezing machine needs to be purchased, the cost is increased, and the occupied space is large. Therefore, in the prior art, the function of quick freezing is realized through a cascade refrigeration system.
A cascade refrigeration system generally includes two separate refrigeration cycles, i.e., a high-temperature-stage refrigeration cycle and a low-temperature-stage refrigeration cycle, and a condenser-evaporator for exchanging heat between the two refrigeration cycles. The high-temperature-stage refrigeration loop uses a high-temperature-stage refrigerant with a relatively high standard boiling point, the low-temperature-stage refrigeration loop uses a low-temperature-stage refrigerant with a relatively low standard boiling point, and the condensing evaporator condenses low-temperature-stage refrigerant gas discharged by a compressor of the low-temperature-stage refrigeration loop by using cold energy produced by the high-temperature-stage refrigerant of the high-temperature-stage refrigeration loop, so that the temperature of the low-temperature-stage evaporator is lower. Therefore, the cascade refrigeration system can meet the low-temperature refrigeration of the refrigeration equipment.
An existing refrigeration device generally has a plurality of temperature zones with different temperature requirements, so in the prior art, a capillary tube and an evaporator are added in an original pipeline of a high-temperature-level refrigeration circuit or a low-temperature-level refrigeration circuit, so that the length of the capillary tube required by a refrigeration system is long, the cost is high, and the pipeline inside the refrigeration device is crowded.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a refrigerating system and have its refrigeration plant that can supply cold and capillary length reduction to a plurality of warm areas.
In order to realize one of the above objects of the present invention, an embodiment of the present invention provides a refrigeration system, including high-temperature refrigeration circuit, low-temperature refrigeration circuit, being used for making the condensation evaporator of heat transfer of high-temperature refrigeration circuit and low-temperature refrigeration circuit, its characterized in that:
the high-temperature-stage refrigeration loop comprises a high-temperature-stage compressor, a condenser, a first capillary tube, a first switching valve, a second capillary tube and a first evaporator which are sequentially connected to form a loop, wherein the first switching valve is provided with a first outlet used for being connected with the second capillary tube and a second outlet used for being connected with the condensing evaporator, and the condensing evaporator is communicated with the high-temperature-stage compressor;
the low-temperature-stage refrigeration loop comprises a low-temperature-stage compressor, a low-temperature-stage capillary tube and a low-temperature-stage evaporator which are sequentially connected to form a loop, wherein the condensation evaporator is arranged between the low-temperature-stage compressor and the low-temperature-stage capillary tube.
As a further improvement of an embodiment of the present invention, the high-temperature stage refrigeration circuit further includes a third capillary tube and a second evaporator, the return air ports of the first outlet of the first switching valve, the third capillary tube, the second evaporator and the high-temperature stage compressor are sequentially communicated, and the second evaporator is connected in parallel with the first evaporator.
As a further improvement of an embodiment of the present invention, the high temperature stage refrigeration circuit further includes a second switching valve disposed between the first switching valve and the second capillary, the second switching valve has a first inlet for communicating with a first outlet of the first switching valve, a third outlet for communicating with the second capillary, and a fourth outlet for communicating with the third capillary.
As a further improvement of an embodiment of the present invention, the length of the second capillary is less than the length of the third capillary and/or the pipe diameter of the second capillary is greater than the pipe diameter of the third capillary.
As a further improvement of an embodiment of the present invention, the high-temperature stage refrigeration circuit further includes a third switching valve, a fourth capillary tube and a third evaporator, the third switching valve is disposed between the first switching valve and the second capillary tube, an inlet of the third evaporator is connected to an outlet of the first evaporator, and an outlet of the third evaporator is connected to a return air port of the high-temperature stage compressor;
the third switching valve has a second inlet for communication with the first outlet of the first switching valve, a fifth outlet for communication with the second capillary, and a sixth outlet for communication with the fourth capillary, the outlet of the fourth capillary being in communication with the inlet of the third evaporator.
As a further improvement of an embodiment of the present invention, the length of the second capillary is less than the length of the third capillary and/or the pipe diameter of the second capillary is greater than the pipe diameter of the third capillary.
As a further improvement of an embodiment of the present invention, the refrigeration system further includes a fan adjacent to the condenser.
As a further improvement of an embodiment of the present invention, the condenser evaporator has a first passage having two ends respectively communicated with the return air port of the first switching valve, the high temperature stage compressor, and a second passage having two ends respectively communicated with the low temperature stage compressor, the low temperature stage capillary tube.
In order to achieve one of the above objects, an embodiment of the present invention provides a refrigeration device, including any one of the above embodiments.
In order to realize one of the above objects of the present invention, an embodiment of the present invention provides a refrigeration apparatus, including a cold storage compartment, a freezing compartment, a quick freezing compartment and the above embodiments, the refrigeration system having a second evaporator, the first evaporator is used for supplying cold to the cold storage compartment, the second evaporator is used for supplying cold to the freezing compartment, the low temperature grade evaporator is used for supplying cold to the quick freezing compartment.
In order to realize one of the above objects of the present invention, an embodiment of the present invention provides a refrigeration apparatus, including a cold storage compartment, a freezing compartment, a quick freezing compartment and the above embodiment, the refrigeration system having a third evaporator, the first evaporator is used for supplying cold to the cold storage compartment, the third evaporator is used for supplying cold to the freezing compartment, and the low temperature grade evaporator is used for supplying cold to the quick freezing compartment.
Compared with the prior art, the beneficial effects of the utility model reside in that: the flow direction of the high-temperature-level refrigerant is switched through the first switching valve, and the first evaporator or the low-temperature-level evaporator is controlled to supply cold, so that the refrigeration system is suitable for refrigeration equipment with a plurality of temperature zones. In addition, the first capillary tube can throttle the refrigerant flowing through the condensing evaporator and the first evaporator, so that the overall length of the capillary tube in the refrigerating system is saved, the cost is saved, the problem of pipeline congestion caused by overlong capillary tube can be avoided, and the space burden is reduced.
Drawings
Fig. 1 is a schematic structural view of a refrigeration system according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of a refrigeration system according to a second embodiment of the present invention;
101, a high-temperature stage compressor; 102. a condenser; 103. a first capillary tube; 104. a first switching valve; 105. a second capillary tube; 106. a first evaporator; 107. a second switching valve; 108. a third capillary tube; 109. a second evaporator; 110. a third switching valve; 111. a fourth capillary tube; 112. a third evaporator;
201. a low temperature stage compressor; 202. a low temperature stage capillary; 203. a low temperature stage evaporator;
300. a condensing evaporator; 301. a first channel; 302. a second channel; 400. a fan.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and structural, method, or functional changes that can be made by those skilled in the art according to these embodiments are all included in the scope of the present invention.
In the various figures of the present invention, certain dimensions of structures or portions are exaggerated relative to other structures or portions for ease of illustration, and thus, are used only to illustrate the basic structure of the subject matter of the present invention.
The utility model provides a refrigerating system, it is applied to refrigeration plant for to refrigeration plant cooling.
As shown in fig. 1 and 2, the refrigeration system includes a high-temperature stage refrigeration circuit, a low-temperature stage refrigeration circuit, and a condensing evaporator 300. The high-temperature-level refrigeration loop is internally provided with a high-temperature-level refrigerant in a flowing mode, and the low-temperature-level refrigeration loop is internally provided with a low-temperature-level refrigerant in a flowing mode. The normal boiling point of the high-temperature-stage refrigerant is higher, and the normal boiling point of the low-temperature-stage refrigerant is lower. The condensing evaporator 300 is used to exchange heat between the high-temperature stage refrigeration circuit and the low-temperature stage refrigeration circuit.
The high-temperature stage refrigeration circuit comprises a high-temperature stage compressor 101, a condenser 102, a first capillary tube 103, a first switching valve 104, a second capillary tube 105 and a first evaporator 106 which are sequentially connected to form a circuit, wherein the first switching valve 104 is provided with a first outlet connected with the second capillary tube 105 and a second outlet connected with a condensing evaporator 300, and the condensing evaporator 300 is communicated with the high-temperature stage compressor 101. The high-temperature stage compressor 101 has an exhaust port for connection with the condenser 102 and a return port for connection with the first evaporator 106 and the condensing evaporator 300.
The low-temperature-stage refrigeration loop comprises a low-temperature-stage compressor 201, a low-temperature-stage capillary tube 202 and a low-temperature-stage evaporator 203 which are sequentially connected to form a loop, and the condensing evaporator 300 is arranged between the low-temperature-stage compressor 201 and the low-temperature-stage capillary tube 202. Therein, low temperature stage compressor 201 has a discharge port for connection with condensing evaporator 300 and a return port for connection with low temperature stage evaporator 203.
When it is required to supply cold to the temperature zone of the refrigeration apparatus through the first evaporator 106, the first switching valve 104 controls the flow of the high temperature stage refrigerant to the first capillary tube 103. At this time, the high-temperature stage refrigerant of the high-temperature stage refrigeration circuit flows as follows: the high-temperature stage compressor 101 compresses a gaseous high-temperature stage refrigerant with a lower pressure into a gaseous high-temperature stage refrigerant with a higher pressure, and sends the high-temperature stage refrigerant to the condenser 102; the high-temperature-stage refrigerant is condensed into a high-pressure liquid in the condenser 102, throttled by the first capillary tube 103 and the second capillary tube 105, and then the high-temperature-stage refrigerant becomes a low-pressure liquid, and is sent to the first evaporator 106, absorbs heat in the first evaporator 106, evaporates into a low-pressure gas, and then is sent to the return air port of the high-temperature-stage compressor 101, thereby completing the refrigeration cycle.
When it is required to supply cold to the warm zone of the refrigeration apparatus through the low temperature stage evaporator 203, the first switching valve 104 controls the flow of the high temperature stage refrigerant to the condensing evaporator 300. At this time, the high-temperature stage refrigerant of the high-temperature stage refrigeration circuit flows as follows: the high-temperature stage compressor 101 compresses the gaseous high-temperature stage refrigerant with lower pressure into gaseous high-temperature stage refrigerant with higher pressure, and sends the high-temperature stage refrigerant into the condenser 102, and the high-temperature stage refrigerant is condensed into liquid with higher pressure in the condenser 102; after throttling by the first capillary tube 103, the high-temperature-stage refrigerant turns into liquid with lower pressure, then enters the condensation evaporator 300, absorbs heat in the condensation evaporator 300, evaporates into gas with lower pressure, and then is sent to the return air port of the high-temperature-stage compressor 101, thereby completing the refrigeration cycle. The flow process of the high-temperature stage refrigerant of the low-temperature stage refrigeration loop is as follows: the low-temperature stage compressor 201 compresses the gaseous low-temperature stage refrigerant with lower pressure into the gaseous low-temperature stage refrigerant with higher pressure, and sends the low-temperature stage refrigerant into the condensing evaporator 300, and the low-temperature stage refrigerant is condensed into liquid with higher pressure in the condensing evaporator 300; after throttling by the low-temperature stage capillary 202, the low-temperature stage refrigerant becomes liquid with lower pressure, then enters the low-temperature stage evaporator 203, absorbs heat in the low-temperature stage evaporator 203, evaporates to become gas with lower pressure, and then is sent to the return air port of the low-temperature stage compressor 201, thereby completing the refrigeration cycle.
The high-temperature-level refrigeration loop and the low-temperature-level refrigeration loop exchange heat, and the refrigeration capacity of the high-temperature-level refrigeration loop is utilized to bear the condensation load of the low-temperature-level refrigeration loop, so that the temperature of the low-temperature-level evaporator 203 is lower. The first switching valve 104 switches the flow direction of the high-temperature-stage refrigerant, and controls the first evaporator 106 or the low-temperature-stage evaporator 203 to supply cold, so that the refrigeration system is suitable for refrigeration equipment with a plurality of temperature zones. Moreover, the first capillary tube 103 can throttle the refrigerant flowing through the condensing evaporator 300 and the first evaporator 106, that is, the condensing evaporator 300 and the first evaporator 106 share the first capillary tube 103, so that the overall length of the capillary tube in the refrigeration system is saved, the cost is saved, meanwhile, the problem of pipeline congestion caused by the overlong capillary tube can be avoided, and the space burden is reduced.
Further, the refrigeration system also includes a fan 400 adjacent the condenser 102. Fan 400 is used to dissipate heat from the surface of condenser 102.
Further, the condenser 102 evaporator has a first passage 301 having two ends respectively communicating with the first switching valve 104 and the return port of the high-temperature stage compressor 101, and a second passage 302 having two ends respectively communicating with the low-temperature stage compressor 201 and the low-temperature stage capillary tube 202. When the high-temperature-stage refrigerant flows through the first passage 301 and the low-temperature-stage refrigerant flows through the second passage 302, the heat exchange between the high-temperature-stage refrigeration circuit and the low-temperature-stage refrigeration circuit is realized.
As shown in fig. 1, a first embodiment of the present invention provides a refrigeration system having a second evaporator 109 connected in parallel with a first evaporator 106, as follows:
the high-temperature stage refrigeration circuit further comprises a third capillary tube 108 and a second evaporator 109, the first outlet of the first switching valve 104, the third capillary tube 108, the second evaporator 109 and the return air port of the high-temperature stage compressor 101 are sequentially communicated, and the second evaporator 109 is connected with the first evaporator 106 in parallel. The utility model discloses a parallelly connected, it means that high temperature level refrigerant can shunt before getting into first evaporator 106, second evaporator 109 to flow through first evaporator 106 and second evaporator 109 simultaneously. The number of temperature zones which can be cooled by the refrigerating system is increased by arranging the plurality of evaporators.
Further, the high temperature stage refrigeration circuit further comprises a second switching valve 107 arranged between the first switching valve 104 and the second capillary tube 105, the second switching valve 107 having a first inlet for communicating with the first outlet of the first switching valve 104, a third outlet for communicating with the second capillary tube 105, and a fourth outlet for communicating with the third capillary tube 108. The high-temperature stage refrigerant may simultaneously flow through the first evaporator 106 and the second evaporator 109 or flow to one of the first evaporator 106 and the second evaporator 109 by the second switching valve 107, so that the function of the refrigeration system is increased. For example, when the temperature ranges corresponding to the first evaporator 106 and the second evaporator 109 are low, only a small cooling capacity is required to maintain the temperature, and at this time, the high-temperature-level refrigerant can flow through the first evaporator 106 and the second evaporator 109 at the same time. If the temperature of the temperature zone corresponding to one of the first evaporator 106 and the second evaporator 109 is higher, the high temperature grade refrigerant flows through the first evaporator 106 or the second evaporator 109 separately, and the refrigeration effect of the first evaporator 106 or the second evaporator 109 is increased.
Further, the length of the second capillary 105 is smaller than the length of the third capillary 108 and/or the tube diameter of the second capillary 105 is larger than the tube diameter of the third capillary 108. In this way, the temperature of the high-temperature-stage refrigerant throttled by the third capillary tube 108 is lower than the temperature of the high-temperature-stage refrigerant throttled by the second capillary tube 105. Once you, the second evaporator 109 is warmer and can be used to provide cooling to the cold compartment of the refrigeration appliance. The third evaporator 112 is cooler and may be used to provide cooling to the freezer compartment of the refrigeration appliance.
As shown in fig. 2, a second embodiment of the present invention provides a refrigeration system having a third evaporator 112 in series with a first evaporator 106, as follows:
the high-temperature-stage refrigeration circuit further comprises a third switching valve 110, a fourth capillary tube 111 and a third evaporator 112, the third switching valve 110 is arranged between the first switching valve 104 and the second capillary tube 105, an inlet of the third evaporator 112 is connected with an outlet of the first evaporator 106, and an outlet of the third evaporator 112 is connected with a return air port of the high-temperature-stage compressor 101.
The third switching valve 110 has a second inlet for communicating with the first outlet of the first switching valve 104, a fifth outlet for communicating with the second capillary 105, and a sixth outlet for communicating with a fourth capillary 111, the outlet of the fourth capillary 111 communicating with the inlet of the third evaporator 112.
When the third switching valve 110 communicates the second capillary tube 105 with the first capillary tube 103, the high temperature stage refrigerant flows through the first evaporator 106 and the second evaporator 109. The first evaporator 106 and the second evaporator 109 can be simultaneously supplied with cooling for providing cooling energy to different temperature zones of the refrigeration device. When the third switching valve 110 communicates the fourth capillary tube 111 with the first capillary tube 103, the high-temperature-stage refrigerant flows through the fourth capillary tube 111 and the third evaporator 112, so that the cooling capacity of the third evaporator 112 is increased.
Further, the length of the second capillary 105 is smaller than the length of the third capillary 108 and/or the tube diameter of the second capillary 105 is larger than the tube diameter of the third capillary 108. In this way, the temperature of the high-temperature-stage refrigerant throttled by the third capillary tube 108 is lower than the temperature of the high-temperature-stage refrigerant throttled by the second capillary tube 105. The second evaporator 109 is therefore at a higher temperature and can be used to supply cold to the refrigerating compartment of the refrigeration appliance. The third evaporator 112 is cooler and may be used to provide cooling to the freezer compartment of the refrigeration appliance.
The first evaporator 106, the second evaporator 109 and the third evaporator 112 according to the above embodiments may be fin-and-tube evaporators or plate-and-tube evaporators, and the condensing evaporator 300 may be a brazed plate heat exchanger.
The utility model also provides a refrigeration plant, including above-mentioned embodiment's refrigerating system.
Further, when the refrigeration system is the refrigeration system with the second evaporator 109 of the first embodiment, the refrigeration equipment package further includes a cold storage compartment, a freezing compartment, and a quick-freezing compartment, the first evaporator 106 is used for supplying cold to the cold storage compartment, the second evaporator 109 is used for supplying cold to the freezing compartment, and the low-temperature stage evaporator 203 is used for supplying cold to the quick-freezing compartment.
The specific working process of the refrigeration equipment of the embodiment is as follows:
(1) when the refrigerating compartment needs to refrigerate, the first outlet of the first switching valve 104 is opened, the second outlet is closed, the third outlet of the second switching valve 107 is opened, the fourth outlet is closed, and the high-temperature-stage refrigerant flows through the high-temperature-stage compressor 101, the condenser 102, the first capillary tube 103, the first switching valve 104, the second switching valve 107, the second capillary tube 105 and the first evaporator 106 in sequence and finally returns to the air return port of the high-temperature-stage compressor 101; the refrigeration system supplies cold to the cold storage compartment through the first evaporator 106;
(2) when the freezing compartment needs to refrigerate, the first outlet of the first switching valve 104 is opened, the second outlet is closed, the third outlet of the second switching valve 107 is closed, the fourth outlet is opened, and the high-temperature-stage refrigerant flows through the high-temperature-stage compressor 101, the condenser 102, the first capillary tube 103, the first switching valve 104, the second switching valve 107, the third capillary tube 108 and the second evaporator 109 in sequence and finally returns to the return port of the high-temperature-stage compressor 101; the refrigeration system supplies cold to the freezer compartment through the second evaporator 109;
(3) when the quick-freezing compartment needs to be refrigerated, the first outlet of the first switching valve 104 is closed, the second outlet is opened, and the high-temperature-stage refrigerant flows through the high-temperature-stage compressor 101, the condenser 102, the first capillary tube 103, the first switching valve 104 and the condensation evaporator 300 in sequence and finally returns to the air return port of the high-temperature-stage compressor 101; the low-temperature-stage refrigerant sequentially flows through a low-temperature-stage compressor 201, a condensation evaporator 300, a low-temperature-stage capillary tube 202 and a low-temperature-stage evaporator 203 and finally returns to an air return port of the low-temperature-stage compressor 201; the refrigeration system supplies cold to the quick-freezing compartment through the low-temperature stage evaporator 203.
Further, when the refrigeration system is the refrigeration system having the third evaporator 112 according to the second embodiment, the refrigeration apparatus further includes a cold storage compartment, a freezing compartment, and a quick-freezing compartment, the first evaporator 106 is used for supplying cold to the cold storage compartment, the third evaporator 112 is used for supplying cold to the freezing compartment, and the low-temperature stage evaporator 203 is used for supplying cold to the quick-freezing compartment.
The specific working process of the refrigeration equipment of the embodiment is as follows:
(1) when the refrigerating compartment needs to refrigerate, the first outlet of the first switching valve 104 is opened, the second outlet is closed, the fifth outlet of the third switching valve 110 is opened, the sixth outlet is closed, and the high-temperature-stage refrigerant flows through the high-temperature-stage compressor 101, the condenser 102, the first capillary tube 103, the first switching valve 104, the third switching valve 110, the fourth capillary tube 111, the first evaporator 106 and the third evaporator 112 in sequence and finally returns to the return air port of the high-temperature-stage compressor 101; the refrigeration system supplies cold to the cold storage chamber through the first evaporator 106, and avoids the temperature rise of the freezing chamber from being too fast through the cold energy of the third evaporator 112;
(2) when the freezing compartment needs to refrigerate, the first outlet of the first switching valve 104 is opened, the second outlet is closed, the fifth outlet of the third switching valve 110 is closed, the sixth outlet is opened, and the high-temperature-stage refrigerant flows through the high-temperature-stage compressor 101, the condenser 102, the first capillary tube 103, the first switching valve 104, the third switching valve 110, the fourth capillary tube 111 and the third evaporator 112 in sequence and finally returns to the air return port of the high-temperature-stage compressor 101; the refrigeration system supplies cold to the freezer compartment through the third evaporator 112;
(3) when the quick-freezing compartment needs to be refrigerated, the first outlet of the first switching valve 104 is closed, the second outlet is opened, and the high-temperature-level refrigerant flows through the high-temperature-level compressor 101, the condenser 102, the first capillary tube 103, the first switching valve 104 and the condensing evaporator 300 in sequence and finally returns to the air return port of the high-temperature-level compressor 101; the low-temperature-stage refrigerant flows through the low-temperature-stage compressor 201, the condensing evaporator 300, the low-temperature-stage capillary tube 202 and the low-temperature-stage evaporator 203 in sequence and finally returns to the air return port of the low-temperature-stage compressor 201; the refrigeration system supplies cold to the quick-freezing compartment through the low-temperature stage evaporator 203.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A refrigerating system comprises a high-temperature-level refrigerating circuit, a low-temperature-level refrigerating circuit and a condensing evaporator for enabling the high-temperature-level refrigerating circuit and the low-temperature-level refrigerating circuit to exchange heat, and is characterized in that:
the high-temperature-stage refrigeration loop comprises a high-temperature-stage compressor, a condenser, a first capillary tube, a first switching valve, a second capillary tube and a first evaporator which are sequentially connected to form a loop, wherein the first switching valve is provided with a first outlet used for being connected with the second capillary tube and a second outlet used for being connected with the condensing evaporator, and the condensing evaporator is communicated with the high-temperature-stage compressor;
the low-temperature refrigeration loop comprises a low-temperature compressor, a low-temperature capillary tube and a low-temperature evaporator which are sequentially connected to form a loop, wherein the condensation evaporator is arranged between the low-temperature compressor and the low-temperature capillary tube.
2. The refrigeration system of claim 1, wherein the high temperature stage refrigeration circuit further comprises a third capillary tube and a second evaporator, the first outlet of the first switching valve, the third capillary tube, the second evaporator and the return air port of the high temperature stage compressor are sequentially communicated, and the second evaporator is connected in parallel with the first evaporator.
3. The refrigerant system as set forth in claim 2, wherein said high temperature stage refrigerant circuit further includes a second switching valve disposed between said first switching valve and said second capillary tube, said second switching valve having a first inlet for communicating with a first outlet of a first switching valve, a third outlet for communicating with said second capillary tube, a fourth outlet for communicating with said third capillary tube.
4. A refrigeration system according to claim 2 or 3, wherein the length of the second capillary tube is less than the length of the third capillary tube and/or the tube diameter of the second capillary tube is greater than the tube diameter of the third capillary tube.
5. The refrigeration system of claim 1, wherein the high temperature stage refrigeration circuit further comprises a third switching valve, a fourth capillary tube, and a third evaporator, the third switching valve disposed between the first switching valve and the second capillary tube, an inlet of the third evaporator connected to an outlet of the first evaporator, an outlet of the third evaporator connected to a return port of the high temperature stage compressor;
the third switching valve has a second inlet for communication with the first outlet of the first switching valve, a fifth outlet for communication with the second capillary and a sixth outlet for communication with the fourth capillary, the outlet of the fourth capillary being in communication with the inlet of the third evaporator.
6. A refrigerating system according to claim 5, wherein the length of the second capillary tube is smaller than the length of the third capillary tube and/or the tube diameter of the second capillary tube is larger than the tube diameter of the third capillary tube.
7. The refrigerant system as set forth in claim 1, wherein said condenser evaporator has a first passage communicating at both ends with said first switching valve, a return port of the high temperature stage compressor, respectively, and a second passage communicating at both ends with said low temperature stage compressor, a low temperature stage capillary tube, respectively.
8. Refrigeration apparatus, characterized in that it comprises a refrigeration system according to any one of claims 1 to 7.
9. Refrigeration apparatus, comprising a cold storage compartment, a freezing compartment, a quick freezing compartment and a refrigeration system as claimed in claim 4, wherein the first evaporator is arranged to supply cold to the cold storage compartment, the second evaporator is arranged to supply cold to the freezing compartment, and the low temperature stage evaporator is arranged to supply cold to the quick freezing compartment.
10. A refrigeration apparatus comprising a cold storage compartment, a freezing compartment, a quick freezing compartment, and a refrigeration system as claimed in claim 6, said first evaporator being arranged to supply cold to said cold storage compartment, said third evaporator being arranged to supply cold to said freezing compartment, and said low temperature stage evaporator being arranged to supply cold to said quick freezing compartment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220006569.9U CN217274926U (en) | 2022-01-04 | 2022-01-04 | Refrigerating system and refrigerating equipment with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220006569.9U CN217274926U (en) | 2022-01-04 | 2022-01-04 | Refrigerating system and refrigerating equipment with same |
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| Publication Number | Publication Date |
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| CN217274926U true CN217274926U (en) | 2022-08-23 |
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| CN202220006569.9U Active CN217274926U (en) | 2022-01-04 | 2022-01-04 | Refrigerating system and refrigerating equipment with same |
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