CN210425610U - Refrigeration system - Google Patents
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- CN210425610U CN210425610U CN201921399391.3U CN201921399391U CN210425610U CN 210425610 U CN210425610 U CN 210425610U CN 201921399391 U CN201921399391 U CN 201921399391U CN 210425610 U CN210425610 U CN 210425610U
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- 238000005057 refrigeration Methods 0.000 title claims description 128
- 230000006835 compression Effects 0.000 claims abstract description 79
- 238000007906 compression Methods 0.000 claims abstract description 79
- 239000003507 refrigerant Substances 0.000 claims description 73
- 239000007788 liquid Substances 0.000 claims description 44
- 238000000926 separation method Methods 0.000 claims description 31
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000007710 freezing Methods 0.000 description 14
- 230000008014 freezing Effects 0.000 description 14
- 238000001816 cooling Methods 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 7
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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Abstract
The utility model relates to a refrigerating system, include: the multistage compressor comprises at least two stages of compression parts which are communicated in sequence; the first refrigerating device is provided with a first air inlet end and a first air outlet end, and the first air outlet end is communicated between any two stages of compression parts; the first air inlet end is communicated with an air outlet of a high-level compression part in any two-stage compression part or communicated with an air outlet of a compression part higher than the high-level compression part; the second refrigerating device is provided with a second air inlet end and a second air outlet end, the second air inlet end is communicated with the air outlet of the highest-stage compression part, and the second air outlet end is communicated with the air return opening of the lowest-stage compression part; the bypass mechanism is arranged between the first exhaust end and the air return port of the lowest-stage compression part; when the first refrigerating device works and the second refrigerating device stops, the bypass mechanism is conducted. When the first refrigerating device works and the second refrigerating device stops, the low-stage compression part of the multi-stage compressor idles, and the load provided by the compressor is matched with the load required by the first refrigerating device, so that the waste of resources is reduced.
Description
Technical Field
The utility model relates to a heat exchange technology field especially relates to a refrigerating system.
Background
The refrigerator is a refrigerating device for keeping constant low temperature, and is a civil product for keeping food or other articles in a constant low-temperature cold state.
The refrigerator generally has a refrigeration function and a freezing function, and the refrigeration function and the freezing function are both realized through a refrigeration system, and the refrigeration system generally comprises a compressor, a condenser, a throttling mechanism and an evaporator. The refrigerator needs different cooling capacities under the cold storage function and the freezing function (namely, the refrigeration load carried by the compressor of the refrigeration system is different under the cold storage function and the freezing function).
The load that traditional refrigerating system's compressor provided can not satisfy simultaneously all matches with the load that cold-stored function and freezing function required, if the compressor generally according to minimum temperature operating mode lectotype (the load that compressor and freezing function required at this moment matches completely, but is greater than the load that cold-stored function required), the compressor emission of this moment lectotype is big, and refrigerating system's comprehensive power consumption is big to cause the waste of resource.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a refrigeration system capable of saving resources, which aims to solve the problem that the load of the compressor of the conventional refrigeration system cannot be completely matched with the load required by the refrigeration function and the freezing function at the same time, thereby causing resource waste.
A refrigeration system comprising:
the multistage compressor comprises at least two stages of compression parts which are communicated in sequence;
the first refrigerating device is provided with a first air inlet end and a first air outlet end, and the first air outlet end is communicated between any two stages of the compression parts; the first air inlet end is communicated with an air outlet of a high-level compression part in any two-stage compression part or communicated with an air outlet of a compression part higher than the high-level compression part;
a second refrigerating device having a second air intake end and a second air discharge end, the second air intake end being communicated with the air discharge port of the highest-stage compression part, the second air discharge end being communicated with the air return port of the lowest-stage compression part;
the bypass mechanism is arranged between the first exhaust end and the air return port of the lowest-stage compression part;
when the first refrigerating device works and the second refrigerating device stops, the bypass mechanism is conducted.
According to the refrigeration system, when the first refrigeration device works and the second refrigeration device stops working, the bypass mechanism is conducted, and the low-stage compression part of the multi-stage compressor idles at the moment, so that the load provided by the multi-stage compressor is matched with the load required by the first refrigeration device, the condition that the load provided by the multi-stage compressor is overlarge is avoided, and the waste of resources is reduced.
In one embodiment, the bypass mechanism includes a first communication line communicating between the first exhaust end and the return air port of the lowest stage compression unit, and a first valve mounted on the first communication line for controlling on/off of the first communication line.
In one embodiment, the first refrigeration device comprises a condenser, a first throttling mechanism and a first evaporator which are sequentially communicated, wherein an air inlet end of the condenser forms the first air inlet end of the first refrigeration device, and an air outlet end of the first evaporator forms the first air outlet end of the first refrigeration device.
In one embodiment, the refrigeration system further comprises a parallel mechanism, one end of the parallel mechanism is connected between the first throttling mechanism and the first evaporator, and the other end of the parallel mechanism and the first evaporator are connected to the same position of the multi-stage compressor;
when the second refrigerating device works and the first refrigerating device stops, the parallel mechanism is conducted.
In one embodiment, the parallel mechanism includes a second communication pipeline and a second valve, one end of the second communication pipeline is communicated between the first throttling mechanism and the first evaporator, the other end of the second communication pipeline is communicated with the multi-stage compressor, and the second valve is assembled on the second communication pipeline and used for controlling the on-off of the second communication pipeline.
In one embodiment, the first refrigeration device further includes a first heat regenerator, where the first heat regenerator is configured to exchange heat between a first refrigerant flowing from the first evaporator to the multistage compressor and a second refrigerant flowing in the first throttling mechanism or flowing to the first evaporator after being throttled by the first throttling mechanism.
In one embodiment, the second refrigeration device shares the condenser with the first refrigeration device; the second refrigerating device further comprises a second throttling mechanism and a second evaporator, the condenser is communicated with the second throttling mechanism in sequence, the air inlet end of the condenser is formed at the second air inlet end of the second refrigerating device, and the air outlet end of the second evaporator is formed at the second air outlet end of the second refrigerating device.
In one embodiment, the refrigeration system further comprises a parallel mechanism, one end of the parallel mechanism is connected between the first throttling mechanism and the first evaporator, and the other end of the parallel mechanism and the first evaporator are connected to the same position of the multi-stage compressor;
one end of the second throttling mechanism is communicated with the first evaporator and the parallel mechanism, and the other end of the second throttling mechanism is communicated with the second evaporator;
when the second refrigerating device works and the first refrigerating device stops, the parallel mechanism is conducted.
In one embodiment, the refrigeration system further includes a third communication pipeline and a third valve, the third communication pipeline is communicated between the first evaporator and the parallel mechanism, and the second throttling mechanism, and the third valve is mounted on the third communication pipeline and is used for controlling on-off of the third communication pipeline.
In one embodiment, the refrigeration system further includes a gas-liquid separation mechanism, the gas-liquid separation mechanism is communicated between the first evaporator and the parallel mechanism and the multistage compressor, the second throttling mechanism is communicated with the first evaporator and the parallel mechanism through the gas-liquid separation mechanism, the gas outlet end of the gas-liquid separation mechanism is communicated with the multistage compressor, and the liquid outlet end of the gas-liquid separation mechanism is communicated with the second throttling mechanism.
In one embodiment, the second refrigeration device further includes a second heat regenerator, where the second heat regenerator is configured to exchange heat with a third refrigerant flowing from the second evaporator to the multistage compressor and a fourth refrigerant flowing in the second throttling mechanism or flowing to the second evaporator after being throttled by the second throttling mechanism.
Drawings
Fig. 1 is a schematic diagram of a refrigeration system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the refrigeration system shown in FIG. 1 with both the first refrigeration unit and the second refrigeration unit operating;
FIG. 3 is a schematic diagram of the refrigeration system shown in FIG. 1 with the second refrigeration unit operating and the first refrigeration unit off;
fig. 4 is a schematic diagram of the refrigeration system shown in fig. 1 when the first refrigeration unit is operating and the second refrigeration unit is off.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a refrigeration system 100, and particularly, the refrigeration system 100 is applied to a refrigerator. It is understood that in other embodiments, the refrigeration system 100 can be applied to other refrigeration devices, and is not limited herein.
The following describes the technical solution of the present application in detail, taking the application of the refrigeration system 100 to a refrigerator as an example. The present embodiment is only for exemplary purposes and does not limit the technical scope of the present application. In addition, the drawings in the embodiments omit unnecessary components to clearly show the technical features of the application.
The refrigeration system 100 includes a multi-stage compressor 10 and a first refrigeration device (not shown), the first refrigeration device has a first gas inlet (not shown) and a first gas outlet (not shown), and a high-temperature and high-pressure gas compressed by the multi-stage compressor 10 enters the first refrigeration device from the first gas inlet, and flows back to the multi-stage compressor 10 from the first gas outlet after passing through a refrigeration cycle to be compressed again.
The refrigeration system 100 further includes a second refrigeration device (not shown), the second refrigeration device has a second air inlet end and a second air outlet end, the high-temperature and high-pressure gas compressed by the multi-stage compressor 10 enters the first refrigeration device from the second air inlet end, and after passing through the refrigeration cycle, flows back to the multi-stage compressor 10 from the second air outlet end to be compressed again.
The first refrigerating device is used for achieving the refrigerating function of the refrigerator, and the second refrigerating device is used for achieving the freezing function of the refrigerator, so that the evaporating temperature provided by the second refrigerating device is lower than the evaporating temperature provided by the first refrigerating device, and the first refrigerating device and the second refrigerating device meet the requirements of the refrigerating function and the freezing function of the refrigerator respectively.
Specifically, the multistage compressor 10 includes at least two stages of compression portions, which are sequentially communicated with each other. The first air inlet end of the first refrigerating device is communicated with an air outlet of a compression part with a higher level than the compression part with any two stages of compression parts. The second air inlet end of the second refrigerating device is communicated with the air outlet of the highest-stage compression part, and the second air outlet of the second refrigerating device is communicated with the air return opening of the lowest-stage compression part.
Through the arrangement, the evaporation temperature provided by the second refrigerating device is lower than that provided by the first refrigerating device, so that the second refrigerating device meets the refrigerating function requirement of the refrigerator, and the first refrigerating device meets the refrigerating function requirement of the refrigerator; and the air inlet end and the air outlet end of the first refrigerating device and the second refrigerating device are respectively communicated with different compression parts of the multi-stage compressor 10, so that the load provided by the multi-stage compressor 10 is matched with the load required by the first refrigerating device and the second refrigerating device, the working effect of the multi-stage compressor 10 is higher, and the waste of resources is reduced.
It should be noted that, the first refrigeration device and the second refrigeration device may work simultaneously or separately, that is, when the refrigeration system 100 is applied to a refrigerator, the refrigerator may implement a refrigeration function or a freezing function separately or implement a refrigeration function and a freezing function simultaneously.
In one embodiment, the multistage compressor 10 is a two-stage compressor, and in this case, the multistage compressor 10 includes two compression parts, i.e., a first compression part 11 and a second compression part 12, and the level of the second compression part 12 is higher than that of the first compression part 11. At this time, the first discharge end of the first refrigeration device communicates between the first compression part 11 and the second compression part 12, and the first intake end of the first refrigeration device communicates with the discharge port of the second compression part 12. A second discharge end of the second refrigeration device is communicated with the return port of the first compression part 11, and a second intake end of the second refrigeration device is communicated with the discharge port of the second compression part 12. It is contemplated that in other embodiments, the multi-stage compressor 10 may be a three-stage compressor or a compressor with more than three stages, and is not limited herein.
For convenience of explanation, in the following embodiments, the multistage compressor 10 is taken as an example of a two-stage compressor, the multistage compressor 10 includes two compression parts, i.e., a first compression part 11 and a second compression part 12, and the level of the second compression part 12 is higher than that of the first compression part 11.
The refrigeration system 100 further includes a bypass mechanism 40, and the bypass mechanism 40 is disposed between the first discharge end of the first refrigeration device and the return port of the first compression part 11. Specifically, when the first refrigeration device is operated and the second refrigeration device is stopped, the bypass mechanism 40 is turned on.
When the first refrigeration device works and the second refrigeration device stops working, the bypass mechanism 40 is conducted, at the moment, the first exhaust end of the first refrigeration device is communicated with the space between the first compression part 11 and the second compression part 12, and the first exhaust end is communicated with the air return port of the first compression part 11 through the bypass mechanism 40, so that the pressure of the air inlet and the pressure of the air outlet of the first compression part 12 are equal, at the moment, the first compression part 11 idles, the load provided by the multistage compressor 10 is matched with the load required by the first refrigeration device, and the waste of resources is avoided.
In one embodiment, the bypass mechanism 40 includes a first communication line 41 and a first valve 42, the first communication line 41 is communicated between the first discharge end of the first refrigeration device and the return air port of the first compression part 11, and the first valve 42 is mounted on the first communication line 41 and is used for controlling the on/off of the first communication line 41. In this manner, the opening and closing of the bypass mechanism 40 can be controlled by operating the first valve 42.
Specifically, the first valve 42 is an automatic valve. It is understood that in other embodiments, the first valve 42 may also be a manual valve, which is not limited herein.
With continued reference to fig. 1, in one embodiment, the first refrigeration device includes a condenser 21, a first throttling mechanism 22 and a first evaporator 23, which are sequentially connected, an air inlet end of the condenser 21 forms a first air inlet end of the first refrigeration device, and an air outlet end of the first evaporator 23 forms a first air outlet end of the first refrigeration device. Thus, the high-temperature and high-pressure gas refrigerant formed after being compressed by the multistage compressor 10 enters the condenser 21, heat is released in the condenser 21, the high-temperature and high-pressure gas refrigerant is condensed by the condenser 21 and then becomes a normal-temperature and high-pressure liquid refrigerant, the refrigerant enters the first throttling mechanism 22 (a capillary tube, a thermal expansion valve or an electronic expansion valve and the like) after being condensed, the pressure of the refrigerant is reduced by throttling and decompressing the first throttling mechanism 22, the formed low-temperature and low-pressure liquid refrigerant finally enters the first evaporator 23, the heat absorption and evaporation are changed into the low-temperature and low-pressure gas refrigerant in the first evaporator 23, and then the low-temperature and low-pressure gas refrigerant is sucked into the multistage compressor 10, and the cycle is repeated.
Specifically, the first refrigeration device further includes a first heat regenerator 24, and the first heat regenerator 24 is configured to exchange heat between a first refrigerant flowing from the first evaporator 23 to the multistage compressor 10 and a second refrigerant flowing in the first throttling mechanism 22 or flowing to the first evaporator 23 after being throttled by the first throttling mechanism 22.
More specifically, the first refrigeration device further includes a fourth communication pipeline 25 and a fifth communication pipeline 26, the fourth communication pipeline 25 is communicated between the condenser 21 and the first evaporator 23, the first throttling mechanism 22 is disposed on the fourth communication pipeline 25, and the fifth communication pipeline 26 is communicated between the first evaporator 23 and the multistage compressor 10.
The first throttling mechanism 22 is disposed in the first heat regenerator 24, and the fifth communication pipe 26 passes through the first heat regenerator 24. Thus, the first refrigerant flowing in the fifth communication pipeline 26 exchanges heat with the second refrigerant flowing in the first throttling mechanism 22, so that the temperature of the refrigerant flowing into the multistage compressor 10 is increased, the superheat degree of the refrigerant entering the multistage compressor 10 is increased, and liquid return of the multistage compressor 10 is avoided; and the second refrigerant flowing in the first throttling mechanism 22 exchanges heat with the first refrigerant flowing in the fifth communication pipeline 26, so that the temperature of the refrigerant flowing into the first evaporator 23 is reduced, and the supercooling degree of the refrigerant entering the first evaporator 23 is improved.
It is understood that in some other embodiments, a portion of the fourth communication pipeline 25 between the first throttling mechanism 22 and the first evaporator 23 may be disposed to penetrate through the first heat regenerator 24, and at this time, the second refrigerant throttled by the first throttling mechanism 22 exchanges heat with the first refrigerant flowing in the fifth communication pipeline 26.
In another embodiment, the first cooling device further includes a first fan 27 and a second fan 28, the first fan 27 is disposed around the condenser 21 for dissipating heat of the condenser 21, and the second fan 28 is disposed around the first evaporator 23 for accelerating the flow of the cool air.
In one embodiment, the refrigeration system 100 further includes a parallel mechanism 50, and one end of the parallel mechanism 50 is connected between the first throttling mechanism 22 and the first evaporator 23, and the other end is connected to the same position of the multi-stage compressor 10 as the first evaporator 23. More specifically, when the second refrigeration apparatus is operated and the first refrigeration apparatus is stopped, the parallel mechanism 50 is turned on.
When the second refrigeration device works and the first refrigeration device stops, the parallel mechanism 50 is conducted, and at the moment, the refrigerant formed after throttling by the first throttling mechanism 22 of the first refrigeration device enters the multistage compressor 10 from the parallel mechanism 50 for air supplement, so that the working efficiency of the multistage compressor 10 is improved.
Specifically, the parallel mechanism 50 includes a second communication pipe 51 and a second valve 52, one end of the second communication pipe 51 is communicated between the first throttling mechanism 22 and the first evaporator 23, the other end is communicated with the multistage compressor 10, and the second valve 52 is mounted on the second communication pipe 51 for controlling on/off of the second communication pipe 51. In this way, the on-off of the parallel mechanism 50 can be controlled by operating the second valve 52.
Specifically, the second valve 52 is an automatic valve. It is understood that in other embodiments, the second valve 52 may also be a manual valve, which is not limited herein.
In one embodiment, the second refrigeration device shares the same condenser 21 as the first refrigeration device. It will be appreciated that in other embodiments, a different condenser 21 may be used for the second refrigeration device than for the first refrigeration device.
Specifically, the second refrigeration device further includes a second throttling mechanism 31 and a second evaporator 32, the condenser 21, the second throttling mechanism 31 and the second evaporator 32 are sequentially communicated, an air inlet end of the condenser 21 forms a second air inlet end of the second refrigeration device, and an air outlet end of the second evaporator 32 forms a second air outlet end of the second refrigeration device. Therefore, the high-temperature and high-pressure gas refrigerant formed after being compressed by the multi-stage compressor 10 enters the condenser 21, heat is released in the condenser 21, the high-temperature and high-pressure gas refrigerant is condensed by the condenser 21 and then becomes a normal-temperature and high-pressure liquid refrigerant, the refrigerant enters the second throttling mechanism 31 after being condensed, the pressure of the refrigerant is reduced through throttling and pressure reduction of the second throttling mechanism 31, the formed low-temperature and low-pressure liquid refrigerant finally enters the second evaporator 32, the heat absorption and evaporation in the second evaporator 32 become the low-temperature and low-pressure gas refrigerant, and then the gas refrigerant is sucked into the multi-stage compressor 10, and the cycle is repeated.
Specifically, one end of the second throttling mechanism 31 communicates with both the first evaporator 23 and the parallel mechanism 50, and the other end of the second throttling mechanism 31 communicates with the second evaporator 32. Therefore, when the second refrigeration device works and the first refrigeration device stops working, the second throttling mechanism 31 is communicated with the first throttling mechanism 22 through the parallel mechanism 50, so that secondary throttling of the second refrigeration device is realized, and when the second refrigeration device works, part of gas flows back to the multistage compressor 10 through the parallel mechanism 50 to supplement gas; when the first refrigeration device and the second refrigeration device work simultaneously, part of the gas flowing out of the first evaporator 23 flows back to the return air port of the first compression part 11 after being throttled twice by the second throttling mechanism 31, and part of the gas directly flows back to a position between the first compression part 11 and the second compression part 12, so that the refrigerating and freezing requirements of the refrigerator are met.
In one embodiment, the refrigeration system 100 further includes a third communication line 60 and a third valve 70, the third communication line 60 is communicated between the first evaporator 23 and the parallel mechanism 50 and the second throttling mechanism 31, and the third valve 70 is mounted on the third communication line 60 for controlling the on/off of the third communication line 60. In this manner, it is possible to facilitate control of the operation of the second cooling device, such as the second cooling device being shut down when the third valve 70 is opened and the second cooling device being operated when the third valve 70 is opened.
Specifically, the third valve 70 is an automatic valve. It is understood that in other embodiments, the third valve 70 may also be a manual valve, which is not limited herein.
In one embodiment, the refrigeration system 100 further includes a gas-liquid separation mechanism 80, the gas-liquid separation mechanism 80 is communicated between the first evaporator 23 and the parallel mechanism 50 and the multi-stage compressor 10, the second throttling mechanism 31 is communicated with the first evaporator 23 and the parallel mechanism 50 through the gas-liquid separation mechanism 80, a gas outlet end of the gas-liquid separation mechanism 80 is communicated with the multi-stage compressor 10, and a liquid outlet end of the gas-liquid separation mechanism 80 is communicated with the second throttling mechanism 31.
Specifically, the fourth communication pipeline 25 includes a first communication section and a second communication section, the first communication section is communicated between the first evaporator 23 and the gas-liquid separation mechanism 80, the second communication section is communicated between the gas outlet end of the gas-liquid separation mechanism 80 and the multi-stage compressor 10, and the second communication section passes through the first heat regenerator 24 for heat exchange. The first communication pipeline 41 of the bypass mechanism 40 is communicated with the second communication section, one end of the second communication pipeline 51 is communicated between the first throttling mechanism 22 and the first evaporator 23, and the other end is communicated with the air inlet end of the gas-liquid separation mechanism 80 through the first communication section. The third communication pipe 60 communicates between the liquid outlet end of the gas-liquid separation mechanism 80 and the second throttle mechanism 31.
More specifically, the gas-liquid separation mechanism 80 may be a flash tank or a gas-liquid separator, and is not limited thereto.
The second refrigeration apparatus further includes a second heat regenerator 33, where the second heat regenerator 33 is configured to exchange heat between a third refrigerant flowing from the second evaporator 32 to the multistage compressor 10 and a fourth refrigerant flowing in the second throttling mechanism 31 or flowing to the second evaporator 32 after being throttled by the second throttling mechanism 31.
Specifically, the second refrigeration apparatus further includes a sixth communication pipe 34, the sixth communication pipe 34 is communicated between the second evaporator 32 and the multistage compressor 10, the second throttling mechanism 31 is disposed in the second regenerator 33, and the sixth communication pipe 34 passes through the second regenerator 33. Thus, the third refrigerant flowing in the sixth communication pipeline 34 exchanges heat with the fourth refrigerant flowing in the second throttling mechanism 31, so that the temperature of the refrigerant flowing to the multistage compressor 10 is increased, the superheat degree of the refrigerant entering the multistage compressor 10 is increased, and liquid return of the multistage compressor 10 is avoided; and the fourth refrigerant flowing in the second throttling mechanism 31 exchanges heat with the third refrigerant flowing in the sixth communication pipeline 34, so that the temperature of the refrigerant flowing into the second evaporator 32 is reduced, and the supercooling degree of the refrigerant entering the second evaporator 32 is improved.
It is understood that in some other embodiments, the second refrigeration device further includes a seventh communication pipeline 35, the seventh communication pipeline 35 is communicated between the second throttling mechanism 31 and the second evaporator 32, and the seventh communication pipeline 35 is disposed in the second regenerator 33, so that the fourth refrigerant throttled by the second throttling mechanism 31 exchanges heat with the third refrigerant flowing in the sixth communication pipeline 34.
In one embodiment, the second cooling device further includes a fourth valve 36, the fourth valve 36 is mounted on the sixth communication pipe 34, the first communication pipe 41 of the bypass mechanism 40 communicates with the return port of the first compression part 11 through the sixth communication pipe 34, and the communication position of the first communication pipe 41 and the sixth communication pipe 34 is located downstream of the fourth valve 36, and the fourth valve 36 can control the second cooling device to be turned on or off.
In another embodiment, the second cooling device further includes a third fan 37, and the third fan 37 is disposed around the second evaporator 32 to accelerate the flow of the cool air.
The embodiment of the utility model provides a refrigerating system 100's theory of operation as follows:
when the refrigerator needs to realize the refrigerating function and the freezing function at the same time:
referring to fig. 2, the bypass mechanism 40 and the parallel mechanism 50 are controlled to be disconnected, at this time, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port of the second compression part 12 of the multi-stage compressor 10 enters the condenser 21, heat is released in the condenser 21, the high-temperature and high-pressure gaseous refrigerant is changed into a normal-temperature and high-pressure liquid refrigerant after being condensed by the condenser 21, the refrigerant enters the first throttling mechanism 22 after being condensed, the pressure of the refrigerant is reduced by throttling of the first throttling mechanism 22, the low-temperature and low-pressure liquid refrigerant formed thereby finally enters the first evaporator 23, heat absorption and evaporation are performed in the first evaporator 23 to be changed into a low-temperature and low-pressure gaseous refrigerant, the gas refrigerant flowing out of the first evaporator 23 enters the gas-liquid separation mechanism 80 for gas-liquid separation, and the saturated vapor formed after separation enters the multi-stage compressor 10 from between the first compression part 11 and the second compression part 12 after heat exchange by the first, the refrigeration function is realized; the separated saturated water is throttled again by the second throttling mechanism 31 and then enters the second evaporator 32 to be evaporated, and the evaporated low-temperature and low-pressure gaseous refrigerant enters the multi-stage compressor 10 from the return port of the first compression part 11 after heat exchange by the second regenerator 33.
When the refrigerator simply realizes the freezing function:
referring to fig. 3, the first refrigeration device is controlled to stop, the parallel mechanism 50 is turned on, and the bypass mechanism 40 is turned off, at this time, a high-temperature and high-pressure gaseous refrigerant discharged from an exhaust port of the second compression part 12 of the multistage compressor 10 enters the condenser 21, heat is released in the condenser 21, the high-temperature and high-pressure gaseous refrigerant is changed into a normal-temperature and high-pressure liquid refrigerant after being condensed by the condenser 21, the refrigerant enters the first throttling mechanism 22 after being condensed, the pressure of the refrigerant is reduced by throttling and decompressing of the first throttling mechanism 22, the formed low-temperature and low-pressure liquid refrigerant enters the gas-liquid separation mechanism 80 through the parallel mechanism 50 to be subjected to gas-liquid separation, and saturated vapor formed after separation is subjected to heat exchange by the first regenerator 24 and then is used for supplementing gas from between the first compression part 11 and; the separated saturated water is throttled again by the second throttling mechanism 31 and then enters the second evaporator 32 to be evaporated, and the evaporated low-temperature and low-pressure gaseous refrigerant enters the multi-stage compressor 10 from the return port of the first compression part 11 after heat exchange by the second regenerator 33.
When the refrigerator simply realizes the refrigeration function:
referring to fig. 4, the second refrigeration device is controlled to stop, the parallel mechanism 50 is disconnected, and the bypass mechanism 40 is turned on, at this time, the high-temperature and high-pressure gaseous refrigerant discharged from the exhaust port of the second compression part 12 of the multi-stage compressor 10 enters the condenser 21, heat is released in the condenser 21, the high-temperature and high-pressure gaseous refrigerant is changed into a normal-temperature and high-pressure liquid refrigerant after being condensed by the condenser 21, the refrigerant enters the first throttling mechanism 22 after being condensed, the pressure of the refrigerant is reduced by throttling of the first throttling mechanism 22, the low-temperature and low-pressure liquid refrigerant thus formed finally enters the first evaporator 23, heat absorption and evaporation are performed in the first evaporator 23 into a low-temperature and low-pressure gaseous refrigerant, the gas refrigerant flowing out of the first evaporator 23 enters the gas-liquid separation mechanism 80 for gas-liquid separation, and the saturated vapor formed after separation enters between the first compression part 11 and the second compression part 12 after heat regenerator 24 exchanges heat, part of the compressed air enters the multi-stage compressor 10 from the return air inlet of the first compression part 11 through the bypass mechanism 40, and the pressure of the air inlet and the pressure of the air outlet of the first compression part 11 are equal, so that the first compression part 11 idles to realize the refrigeration function, and the load provided by the multi-stage compressor 10 is matched with the load required by the refrigeration function, so that the working efficiency is improved; the saturated water formed after the separation is discharged to the outside.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (11)
1. A refrigeration system (100), comprising:
a multistage compressor (10) including at least two stages of compression parts communicated in sequence;
the first refrigerating device is provided with a first air inlet end and a first air outlet end, and the first air outlet end is communicated between any two stages of the compression parts; the first air inlet end is communicated with an air outlet of a high-level compression part in any two-stage compression part or communicated with an air outlet of a compression part higher than the high-level compression part;
a second refrigerating device having a second air intake end and a second air discharge end, the second air intake end being communicated with the air discharge port of the highest-stage compression part, the second air discharge end being communicated with the air return port of the lowest-stage compression part;
a bypass mechanism (40) provided between the first exhaust end and a return air port of the lowest stage compression unit;
when the first refrigerating device works and the second refrigerating device stops, the bypass mechanism (40) is conducted.
2. The refrigeration system (100) according to claim 1, wherein the bypass mechanism (40) includes a first communication pipe (41) and a first valve (42), the first communication pipe (41) is communicated between the first discharge end and the return port of the lowest stage of the compression portion, and the first valve (42) is mounted on the first communication pipe (41) for controlling on/off of the first communication pipe (41).
3. The refrigeration system (100) according to claim 1, wherein the first refrigeration device comprises a condenser (21), a first throttling mechanism (22) and a first evaporator (23) which are communicated in sequence, an air inlet end of the condenser (21) forms the first air inlet end of the first refrigeration device, and an air outlet end of the first evaporator (23) forms the first air outlet end of the first refrigeration device.
4. The refrigeration system (100) according to claim 3, wherein the refrigeration system (100) further comprises a parallel mechanism (50), one end of the parallel mechanism (50) is connected between the first throttling mechanism (22) and the first evaporator (23), and the other end is connected to the same position of the multistage compressor (10) as the first evaporator (23);
when the second refrigerating device works and the first refrigerating device stops, the parallel mechanism (50) is conducted.
5. The refrigeration system (100) according to claim 4, wherein the parallel mechanism (50) comprises a second communication pipeline (51) and a second valve (52), one end of the second communication pipeline (51) is communicated between the first throttling mechanism (22) and the first evaporator (23), the other end of the second communication pipeline is communicated with the multistage compressor (10), and the second valve (52) is assembled on the second communication pipeline (51) and used for controlling the on-off of the second communication pipeline (51).
6. The refrigeration system (100) of claim 3, wherein the first refrigeration device further comprises a first heat regenerator (24), and the first heat regenerator (24) is configured to exchange heat between a first refrigerant flowing from the first evaporator (23) to the multistage compressor (10) and a second refrigerant flowing in the first throttling mechanism (22) or throttling by the first throttling mechanism (22) and flowing to the first evaporator (23).
7. A refrigeration system (100) according to any of claims 3 to 6, characterized in that said second refrigeration device shares said condenser (21) with said first refrigeration device; the second refrigerating device further comprises a second throttling mechanism (31) and a second evaporator (32), the condenser (21) is connected with the second throttling mechanism (31) in sequence, the second evaporator (32) is communicated in sequence, the air inlet end of the condenser (21) is formed into the second air inlet end of the second refrigerating device, and the air outlet end of the second evaporator (32) is formed into the second air outlet end of the second refrigerating device.
8. The refrigeration system (100) according to claim 7, wherein the refrigeration system (100) further comprises a parallel mechanism (50), one end of the parallel mechanism (50) is connected between the first throttling mechanism (22) and the first evaporator (23), and the other end is connected to the same position of the multistage compressor (10) as the first evaporator (23);
one end of the second throttling mechanism (31) is communicated with the first evaporator (23) and the parallel mechanism (50), and the other end of the second throttling mechanism (31) is communicated with the second evaporator (32);
when the second refrigerating device works and the first refrigerating device stops, the parallel mechanism (50) is conducted.
9. The refrigeration system (100) according to claim 8, wherein the refrigeration system (100) further comprises a third communication pipeline and a third valve, the third communication pipeline is communicated between the first evaporator (23) and the parallel mechanism (50) and the second throttling mechanism (31), and the third valve is assembled on the third communication pipeline for controlling the on-off of the third communication pipeline.
10. The refrigeration system (100) according to claim 8, wherein the refrigeration system (100) further comprises a gas-liquid separation mechanism (80), the gas-liquid separation mechanism (80) is communicated between the first evaporator (23) and the parallel mechanism (50) and the multistage compressor (10), the second throttling mechanism (31) is communicated with the first evaporator (23) and the parallel mechanism (50) through the gas-liquid separation mechanism (80), a gas outlet end of the gas-liquid separation mechanism (80) is communicated with the multistage compressor (10), and a liquid outlet end of the gas-liquid separation mechanism (80) is communicated with the second throttling mechanism (31).
11. The refrigeration system (100) according to claim 7, wherein the second refrigeration apparatus further comprises a second regenerator (33), and the second regenerator (33) is configured to exchange heat between a third refrigerant flowing from the second evaporator (32) to the multistage compressor (10) and a fourth refrigerant flowing to the second evaporator (32) or after throttling by the second throttling mechanism (31).
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|---|---|---|---|
| CN201921399391.3U CN210425610U (en) | 2019-08-26 | 2019-08-26 | Refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921399391.3U CN210425610U (en) | 2019-08-26 | 2019-08-26 | Refrigeration system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411047A (en) * | 2019-08-26 | 2019-11-05 | 珠海格力电器股份有限公司 | Refrigeration system |
| CN112393452A (en) * | 2020-11-27 | 2021-02-23 | 珠海格力电器股份有限公司 | Refrigerator refrigerating system and operation method thereof |
| CN110411047B (en) * | 2019-08-26 | 2024-09-24 | 珠海格力电器股份有限公司 | Refrigerating system |
-
2019
- 2019-08-26 CN CN201921399391.3U patent/CN210425610U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411047A (en) * | 2019-08-26 | 2019-11-05 | 珠海格力电器股份有限公司 | Refrigeration system |
| CN110411047B (en) * | 2019-08-26 | 2024-09-24 | 珠海格力电器股份有限公司 | Refrigerating system |
| CN112393452A (en) * | 2020-11-27 | 2021-02-23 | 珠海格力电器股份有限公司 | Refrigerator refrigerating system and operation method thereof |
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