CN211372812U - Refrigerator - Google Patents
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- CN211372812U CN211372812U CN201922305536.5U CN201922305536U CN211372812U CN 211372812 U CN211372812 U CN 211372812U CN 201922305536 U CN201922305536 U CN 201922305536U CN 211372812 U CN211372812 U CN 211372812U
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Abstract
The utility model relates to a refrigerator, including the cabinet body and install the overlapping formula refrigerating system on the cabinet body, refrigerating system includes: a condensing evaporator; the air suction port of the high-temperature compressor is communicated with the condensation evaporator; the inlet of the condenser is communicated with the exhaust port of the high-temperature compressor; the inlet of the first throttling device is connected with the outlet of the condenser, and the outlet of the first throttling device is communicated with the condensation evaporator; the inlet of the second throttling device is communicated with the condensation evaporator; the inlet of the first evaporator is communicated with the outlet of the second throttling device; the air suction port is communicated with the outlet of the first evaporator, and the air exhaust port is communicated with the condensing evaporator; the first branch point and the second branch point are connected in series: the inlet of the third throttling device is communicated with the first branch point; the inlet of the second evaporator is communicated with the outlet of the third throttling device, and the outlet of the second evaporator is communicated with the second branch point; a switching device is arranged at the first branch point; the utility model discloses can realize rapid cooling, guarantee that the cooling is even, and reduce the product and use the energy consumption.
Description
Technical Field
The utility model relates to a refrigerator.
Background
When the preset temperature is ultra-low temperature, the refrigerator generally adopts a two-stage cascade refrigeration system, which is shown in the attached drawing 1 specifically: the left refrigerating system is a high-temperature stage, the inside of the left refrigerating system adopts a medium-temperature refrigerant, the right refrigerating system is a low-temperature stage, and the inside of the right refrigerating system adopts a low-temperature refrigerant.
The working process of the refrigeration system is as follows:
in the temperature-pulling process, the high-temperature compressor B is started firstly to pre-cool the condensing evaporator E, the low-temperature compressor A is started to refrigerate after the temperature of the condensing evaporator E is reduced to a certain degree, at the moment, because the low-temperature refrigerating system starts to operate and has small refrigerating capacity, the low-temperature refrigerant is completely evaporated at the front end of the evaporator F, the air suction temperature and the air suction pressure of the high-temperature compressor B are increased, the exhaust temperature and the exhaust pressure of the high-temperature compressor B are increased, the low-temperature refrigerant is in an incomplete condensation state, the refrigerating efficiency of the low-temperature system is reduced, the temperature reduction time is prolonged, the low-temperature compressor A can be caused to run in an overload mode within a period of time, and the phenomenon of tripping of an;
in the stable operation process, because the product is designed according to ultralow temperature, if the designed refrigerating temperature is 86 ℃ below zero, the designed evaporating temperature of the evaporator F of the low-temperature system is lower, and when the set temperature is 40 ℃ below zero, the evaporating temperature difference of each layer in the evaporator F is larger, and the temperature of the lower layer is lower than that of the upper layer when the temperature of the lower layer does not reach the set value, so that local low temperature is caused, and even stored articles are frozen.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: overcome prior art's not enough, provide a freezer, can shorten the cooling time at ultra-low temperature refrigeration in-process, and when setting for refrigeration temperature higher, prevent the inhomogeneous condition of temperature.
In order to achieve the above object, the utility model discloses a refrigerator, it include the cabinet body and install in overlapping formula refrigerating system on the cabinet body, overlapping formula refrigerating system includes:
the condensation evaporator is provided with a first inlet and a first outlet which are communicated with each other, and a second inlet and a second outlet which are communicated with each other;
a high-temperature compressor, an air suction port of which is communicated with the first outlet;
the inlet of the condenser is communicated with the exhaust port of the high-temperature compressor;
an inlet of the first throttling device is connected with an outlet of the condenser, and an outlet of the first throttling device is communicated with the first outlet;
a second throttling device, an inlet of which is communicated with the second outlet;
the inlet of the first evaporator is communicated with the outlet of the second throttling device; and
a gas suction port of the low-temperature compressor is communicated with an outlet of the first evaporator, and a gas exhaust port of the low-temperature compressor is communicated with the second inlet;
a first branch point is arranged on a pipeline for communicating the condenser with the first throttling device, a second branch point is arranged on a pipeline for communicating the high-temperature compressor with the condensation evaporator, a branch is connected between the first branch point and the second branch point, and the branch is connected in series with:
the inlet of the third throttling device is communicated with the first branch point; and
the inlet of the second evaporator is communicated with the outlet of the third throttling device, and the outlet of the second evaporator is communicated with the second branch point;
and a switching device is arranged at the first branch point, and the switching device can communicate the condenser with the third throttling device or communicate the condenser with the first throttling device.
Preferably, the switching device is a three-way valve, a first valve port of the three-way valve is communicated with the outlet of the condenser, a second valve port of the three-way valve is communicated with the inlet of the first throttling device, and a third valve port of the three-way valve is communicated with the inlet of the third throttling device.
Preferably, the three-way valve is a solenoid valve or an electric switching valve.
Preferably, the first throttling means, the second throttling means and the third throttling means are capillary tubes.
Utility model as preferred scheme, the cabinet body include the base and install in box on the base, first evaporimeter reaches the second evaporimeter is all followed the box is from last to extending the setting down, the condensation evaporimeter high temperature compressor the condenser low temperature compressor reaches auto-change over device all locates in the base.
Preferably, the inlet of the first evaporator and the inlet of the second evaporator are both arranged at the top end of the box body, and the outlet of the first evaporator and the outlet of the second evaporator are both arranged at the bottom end of the box body.
Preferably, the first evaporator and the second evaporator are arranged in parallel.
The embodiment of the utility model provides a refrigerator, compared with the prior art, its beneficial effect lies in:
the refrigerator provided by the embodiment of the utility model is provided with the cascade refrigeration system which is designed with a double-evaporation structure, and the first evaporator is connected in series on the low-temperature loop, and the second evaporator is connected in parallel on the high-temperature loop; when the refrigeration is carried out at low temperature, at the beginning of a temperature-pulling stage, because the temperature in the cabinet body is relatively high, the evaporation temperature is not required to be designed too low, and at the moment, the medium-temperature refrigerant is evaporated in the second evaporator to provide refrigeration, so that the cooling speed can be effectively increased; in addition, when the medium temperature refrigerates, the medium temperature refrigerant is only needed to be evaporated in the second evaporator to provide the temperature raising and refrigeration, so that the rapid cooling is ensured, the temperature in the cabinet body can be kept uniform, and moreover, the low temperature compressor is not needed to be started at the moment, so that the use energy consumption of the product can be effectively reduced.
Drawings
Fig. 1 is a schematic structural diagram of a cascade refrigeration system of a refrigerator in the background art of the present invention;
fig. 2 is a schematic structural view of a refrigerator according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cascade refrigeration system of a refrigerator according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of the cascade refrigeration system of the refrigerator according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of the cascade refrigeration system of the refrigerator according to the embodiment of the present invention after hiding the throttling devices, the evaporators and the condensing evaporator;
fig. 6 is a schematic structural diagram of the first evaporator and the second evaporator of the cascade refrigeration system of the refrigerator in the embodiment of the present invention.
In the figure, 100, a cabinet body; 101. a box body; 102. a base; 1. a condensing evaporator; a. a first inlet; b. a first outlet; c. a second inlet; d. a second outlet; 2. a high temperature compressor; 3. a condenser; 4. a first throttling device; 5. a second throttling device; 6. a first evaporator; 7. a cryogenic compressor; 8. a branch circuit; e. a first branch point; f. a second branch point; 9. a third throttling means; 10. a second evaporator; 20. and a switching device.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "first", "second", and the like are used in the present invention to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1-6, a first aspect of the embodiments of the present invention provides a refrigerator, which includes a cabinet 100 and a cascade refrigeration system installed on the cabinet 100, wherein the cascade refrigeration system includes a condensation evaporator 1, a high temperature compressor 2, a condenser 3, a first throttling device 4, a second throttling device 5, a first evaporator 6, and a low temperature compressor 7; the condensation evaporator 1 is provided with a first inlet a and a first outlet b which are communicated with each other, and a second inlet c and a second outlet d which are communicated with each other, the suction port of the high-temperature compressor 2 is communicated with the first outlet a, the inlet of the condenser 3 is communicated with the exhaust port of the high-temperature compressor 2, the inlet of the first throttling device 4 is connected with the outlet of the condenser 3, the outlet of the first throttling device 4 is communicated with the first outlet b, the inlet of the second throttling device 5 is communicated with the second outlet d, the inlet of the first evaporator 6 is communicated with the outlet of the second throttling device 7, the suction port of the low-temperature compressor 7 is communicated with the outlet of the first evaporator 6, and the exhaust port of the low-temperature compressor 7 is communicated with the second inlet c;
on the basis of this structure, in the present embodiment, a first branch point e is provided on the pipeline connecting the condenser 3 and the first throttling device 4, and a second branch point f is provided on the pipeline connecting the high-temperature compressor 2 and the condensing evaporator 1, as shown in fig. 3, a branch 8 is connected between the first branch point e and the second branch point f, a third throttling device 9 and a second evaporator 10 are connected on the branch 8 in series, an inlet of the third throttling device 9 is communicated with the first branch point e, an inlet of the second evaporator 10 is communicated with an outlet of the third throttling device 9, an outlet of the second evaporator 10 is communicated with the second branch point f, and a switching device 20 is arranged at the first branch point e, and the switching device 20 can communicate the condenser 3 with the third throttling device 9 or communicate the condenser 3 with the first throttling device 4.
Based on the technical scheme, the high-temperature compressor 2, the condenser 3, the first throttling device 4 and the condensation evaporator 1 are limited to form a high-temperature loop, medium-temperature refrigerants circulate in the high-temperature loop, the low-temperature compressor 7, the condensation evaporator 1, the second throttling device 5 and the first evaporator 6 are limited to form a low-temperature loop, low-temperature refrigerants circulate in the low-temperature loop, in addition, a branch 8 is connected in parallel between a first fulcrum e and a second fulcrum f of the high-temperature loop, and a third throttling device 9 and a second evaporator 10 are connected to the branch 8 in series.
Specifically, in this embodiment, the operation process of the refrigeration system is as follows:
when the set refrigeration temperature is low, the high-temperature compressor 2 is started in a temperature pulling stage, the switching device 20 controls the condenser 3 to be communicated with the third throttling device 9, the medium-temperature refrigerant is condensed by the condenser 3, flows to the third throttling device 9 for throttling, flows into the second evaporator 10 for high-temperature evaporation to carry out refrigeration, when the temperature is reduced to a certain degree, the switching device 20 controls the condenser 3 to be communicated with the condensation evaporator 1, so that the medium-temperature refrigerant flows into the condensation evaporator 1 for evaporation to cool the condensation evaporator 1, the low-temperature compressor 7 is started after the condensation evaporator 1 is cooled to a certain degree, and the low-temperature refrigerant is evaporated at a low temperature in the first evaporator 6 for refrigeration until the low-temperature refrigerant stably runs;
when the set refrigeration temperature is higher, only the high-temperature compressor 2 is started in both the temperature-pulling stage and the stable operation stage, the switching device 20 controls the condenser 3 to be communicated with the third throttling device 9, the medium-temperature refrigerant flows through the second evaporator and then is evaporated at high temperature to refrigerate, the low-temperature compressor 7 does not need to be started in the whole process, and the use energy consumption of products can be effectively reduced.
In the embodiment, a double-evaporation structure is designed, namely, a first evaporator 6 is connected in series on a low-temperature loop, and a second evaporator 10 is connected in parallel on a high-temperature loop; when low-temperature evaporation is needed, refrigeration is provided by the first evaporator 6, and when high-temperature evaporation is needed, refrigeration is provided by the second evaporator 10, so that the temperature is more uniform when the set cooling temperature is higher while the cooling speed is increased.
Preferably, in order to simplify the structure, the switching device 20 is a three-way valve, a first port of the three-way valve is communicated with the outlet of the condenser 3, a second port of the three-way valve is communicated with the inlet of the first throttling device 4, and a third port of the three-way valve is communicated with the inlet of the third throttling device 9.
As an alternative, the above-mentioned switching device 20 may be provided as two-way valves, which are respectively connected in series between the first fulcrum e and the first throttling device 4, and between the first fulcrum e and the third throttling device 9.
In this embodiment, the three-way valve is an electromagnetic valve or an electric switching valve, wherein the electromagnetic valve controls the operation of the valve body by controlling the on-off of the current of the electromagnet, so as to realize the switching of different positions of the valve, and the electric switching valve controls the valve by using an electric actuator to realize the switching of the positions of the valve; the condenser 3 can be automatically controlled to be communicated with the first throttling device 4 or the condenser 3 can be automatically controlled to be communicated with the third throttling device 9 by using an electromagnetic valve or an electric switching valve, so that the medium-temperature refrigerant is controlled to flow into the condensing evaporator 1 or the second evaporator 10 for evaporation.
In this embodiment, for example, the first throttling device 4, the second throttling device 5 and the third throttling device 9 are all capillary tubes, and the pressure of the refrigerant passing through the capillary tubes is reduced.
Illustratively, as shown in fig. 4, the condensing evaporator 1 in the present embodiment has a disk shape, and the disk-shaped condensing evaporator 1 is disposed between each compressor and each condenser.
The utility model discloses preferably, in this embodiment, the cabinet body 100 include base 102 and install in box 101 on the base 102, first evaporimeter 6 reaches second evaporimeter 10 is all followed box 101 is from last to extending the setting down, and the low temperature refrigerant evaporates in first evaporimeter 6 in order to carry out the successive layer cooling, the medium temperature refrigerant evaporates in second evaporimeter 10 in order to carry out the successive layer cooling, condensation evaporimeter 1 high temperature compressor 2 the condenser 3 low temperature compressor 7 reaches switching device 20 all locates in the base 102, be convenient for distribute away the heat that produces in the operation process.
In this embodiment, the inlet of the first evaporator 6 and the inlet of the second evaporator 10 are both disposed at the top end of the box 101, the outlet of the first evaporator 6 and the outlet of the second evaporator 10 are both disposed at the bottom end of the box 101, the low-temperature refrigerant flows through the first evaporator 6 from top to bottom along the box 101 for low-temperature evaporation, and the medium-temperature refrigerant can flow through the second evaporator 10 from top to bottom along the box 101 for high-temperature evaporation.
In order to reasonably arrange the first evaporator 6 and the second evaporator 10 and save the arrangement space, the first evaporator 6 and the second evaporator 10 are arranged in parallel, and refer to fig. 6 specifically.
The second aspect of the present invention further provides a method for operating a refrigerator according to the first aspect, comprising:
when the set refrigeration temperature is lower than a first preset temperature, in a temperature-pulling stage, the high-temperature compressor 2 is started, the low-temperature compressor 7 keeps a closed state, the switching device 20 is switched to be communicated with the condenser 3 and the third throttling device 9, the medium-temperature refrigerant condensed by the condenser 3 flows to the third throttling device 9 through the switching device 20 and then flows into the second evaporator 10 to be evaporated, and therefore the temperature in the cabinet body is reduced; when the temperature in the cabinet body reaches a second preset temperature, the switching device 20 is switched to be communicated with the condenser 3 and the first throttling device 4, and the medium-temperature refrigerant flows into the condensation evaporator 1 to be evaporated after flowing to the first throttling device 4 through the switching device 20 so as to cool the condensation evaporator 1; when the temperature of the condensation evaporator 1 reaches a third preset temperature, starting the low-temperature compressor 7, condensing the low-temperature refrigerant by the condensation evaporator 1, and then flowing into the first evaporator 6 for low-temperature evaporation so as to refrigerate the interior of the cabinet body until a stable operation stage;
when the set refrigeration temperature is greater than or equal to the first preset temperature, in the temperature-pulling and stable operation stage, the high-temperature compressor 2 is started, the low-temperature compressor 7 is kept in a closed state, the switching device 20 is switched to be communicated with the condenser 3 and the third throttling device 9, the medium-temperature refrigerant is condensed by the condenser 3, flows into the third throttling device throttling 9 through the switching device, and flows into the second evaporator 10 after being throttled to perform high-temperature evaporation, so that the interior of the cabinet body is refrigerated.
Preferably, in order to achieve the optimized temperature-pulling and cooling effects, the first preset temperature is-35 ℃ to-45 ℃, and the second preset temperature is-25 ℃ to-35 ℃.
More specifically, the first preset temperature is set to-40 ℃ and the second preset temperature is set to-30 ℃.
To sum up, the embodiment of the utility model provides a freezer and an operation method of the freezer, a cascade refrigeration system is arranged in the freezer, a double-evaporation structure is designed in the refrigeration system, a first evaporator is connected in series on a low-temperature loop, and a second evaporator is connected in parallel on a high-temperature loop; when the refrigeration is carried out at low temperature, at the beginning of a temperature-pulling stage, because the temperature in the cabinet body is relatively high, the evaporation temperature is not required to be designed too low, and at the moment, the medium-temperature refrigerant is evaporated in the second evaporator to provide refrigeration, so that the cooling speed can be effectively increased; in addition, when the medium temperature refrigerates, the medium temperature refrigerant is only needed to be evaporated in the second evaporator to provide the temperature raising and refrigeration, so that the rapid cooling is ensured, the temperature in the cabinet body can be kept uniform, and moreover, the low temperature compressor is not needed to be started at the moment, so that the use energy consumption of the product can be effectively reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a freezer which characterized in that, includes the cabinet body and installs in cascade refrigeration system on the cabinet body, cascade refrigeration system includes:
a condensing evaporator having a first inlet and a first outlet which are communicated with each other, and a second inlet and a second outlet which are communicated with each other;
a high-temperature compressor, an air suction port of which is communicated with the first outlet;
the inlet of the condenser is communicated with the exhaust port of the high-temperature compressor;
an inlet of the first throttling device is connected with an outlet of the condenser, and an outlet of the first throttling device is communicated with the first outlet;
a second throttling device, an inlet of which is communicated with the second outlet;
the inlet of the first evaporator is communicated with the outlet of the second throttling device; and
a gas suction port of the low-temperature compressor is communicated with an outlet of the first evaporator, and a gas exhaust port of the low-temperature compressor is communicated with the second inlet;
a first branch point is arranged on a pipeline for communicating the condenser with the first throttling device, a second branch point is arranged on a pipeline for communicating the high-temperature compressor with the condensation evaporator, a branch is connected between the first branch point and the second branch point, and the branch is connected in series with:
the inlet of the third throttling device is communicated with the first branch point; and
the inlet of the second evaporator is communicated with the outlet of the third throttling device, and the outlet of the second evaporator is communicated with the second branch point;
and a switching device is arranged at the first branch point, and the switching device can communicate the condenser with the third throttling device or communicate the condenser with the first throttling device.
2. The refrigerator of claim 1 wherein the switching means is a three-way valve, a first port of the three-way valve being in communication with the outlet of the condenser, a second port of the three-way valve being in communication with the inlet of the first throttling means, and a third port of the three-way valve being in communication with the inlet of the third throttling means.
3. The refrigerator of claim 2 wherein the three-way valve is a solenoid valve or an electrically operated switch valve.
4. The cooler of claim 2, wherein said first throttling means, said second throttling means, and said third throttling means are capillary tubes.
5. The refrigerator of claim 1 wherein the cabinet includes a base and a box mounted on the base, the first evaporator and the second evaporator are both disposed along the box extending from top to bottom, and the condensing evaporator, the high temperature compressor, the condenser, the low temperature compressor and the switching device are all disposed in the base.
6. The refrigerator of claim 5 wherein the inlet of the first evaporator and the inlet of the second evaporator are both disposed at the top end of the cabinet, and the outlet of the first evaporator and the outlet of the second evaporator are both disposed at the bottom end of the cabinet.
7. The refrigerator of claim 5 wherein said first evaporator and said second evaporator are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305536.5U CN211372812U (en) | 2019-12-19 | 2019-12-19 | Refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305536.5U CN211372812U (en) | 2019-12-19 | 2019-12-19 | Refrigerator |
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| Publication Number | Publication Date |
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| CN211372812U true CN211372812U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922305536.5U Active CN211372812U (en) | 2019-12-19 | 2019-12-19 | Refrigerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849011A (en) * | 2019-12-19 | 2020-02-28 | 海信容声(广东)冷柜有限公司 | Refrigerator and operation method thereof |
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2019
- 2019-12-19 CN CN201922305536.5U patent/CN211372812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849011A (en) * | 2019-12-19 | 2020-02-28 | 海信容声(广东)冷柜有限公司 | Refrigerator and operation method thereof |
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