CN218179339U - Refrigerating device - Google Patents
Refrigerating device Download PDFInfo
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- CN218179339U CN218179339U CN202221693239.8U CN202221693239U CN218179339U CN 218179339 U CN218179339 U CN 218179339U CN 202221693239 U CN202221693239 U CN 202221693239U CN 218179339 U CN218179339 U CN 218179339U
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- 239000003507 refrigerant Substances 0.000 claims abstract description 83
- 238000005057 refrigeration Methods 0.000 claims abstract description 82
- 238000001704 evaporation Methods 0.000 claims abstract description 38
- 230000008020 evaporation Effects 0.000 claims abstract description 32
- 230000005494 condensation Effects 0.000 claims abstract description 21
- 238000009833 condensation Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model provides a refrigerating device, which comprises a box body, a high-temperature stage and a low-temperature stage refrigerating circulation loop, wherein the high-temperature stage refrigerating circulation loop comprises a high-temperature stage compressor, a high-temperature stage throttling device and an evaporation assembly, a first refrigerant flows in the high-temperature stage refrigerating circulation loop, and the evaporation assembly comprises a high-temperature stage evaporator and an evaporation part; the low-temperature stage refrigeration cycle loop comprises a low-temperature stage compressor and a condensing part, wherein a second refrigerant flows through the low-temperature stage compressor and exchanges heat with a first refrigerant flowing through the evaporating part; the refrigerator body is provided with a first storage chamber and a second storage chamber, the high-temperature-level refrigeration cycle loop and the low-temperature-level refrigeration cycle loop respectively supply cold for the first storage chamber and the second storage chamber, the high-temperature-level evaporator is attached to the inner container of the first storage chamber, and the refrigerator body further comprises a temperature sensor arranged at the inlet of the high-temperature-level evaporator. The utility model discloses can judge through the temperature variation of high temperature level evaporimeter entrance condensation pressure when low temperature level compressor starts.
Description
Technical Field
The utility model relates to a refrigeration plant technical field especially relates to a refrigerating plant.
Background
Along with the improvement of economic level, the transportation is more and more convenient, and cold chain transportation also takes place, and food material in different areas or even different countries gets into market supermarket gradually, and step into the family dining table, but the time that it can be stored is different for different food material under different storage conditions, and even the freshness of food material also can change along with the change of storage conditions, consequently, need to classify the storage to food material of different kinds.
The storage effect of different food materials is mainly related to the temperature, and the existing refrigerating device adopts a cascade type compression refrigerating system to respectively supply cold to different storage compartments, but the condition of large condensing pressure often appears when a low-temperature stage compressor is started.
Disclosure of Invention
In order to solve the technical problem, an object of the utility model is to provide a refrigerating plant to under the condition of solving current refrigerating plant and adopting cascade compression refrigerating system to supply cold, the problem that condensing pressure is big appears easily when low temperature compressor starts.
In order to achieve one of the above objects of the present invention, one embodiment of the present invention provides a refrigerating apparatus, comprising,
the high-temperature refrigeration circulating loop comprises a high-temperature compressor, a high-temperature throttling device and an evaporation assembly which are arranged in series, wherein the evaporation assembly comprises a high-temperature evaporator and an evaporation part which are arranged in series, and a first refrigerant flows in the high-temperature refrigeration circulating loop;
the low-temperature stage refrigeration cycle loop comprises a low-temperature stage compressor and a condensing part, wherein a second refrigerant flows through the low-temperature stage refrigeration cycle loop, and the second refrigerant flowing through the condensing part exchanges heat with the first refrigerant flowing through the evaporating part;
the box, room and second storing room between wherein having, high temperature level refrigeration cycle return circuit does room cooling between first storing, low temperature level refrigeration cycle return circuit does room cooling between the second storing, high temperature level evaporimeter is attached in the inner bag of room between first storing, the box still including set up in the temperature sensor of high temperature level evaporimeter entrance.
As a further improvement of an embodiment of the present invention, the refrigeration device further includes a controller, the controller is connected to the temperature sensor, and is used for controlling the operation state of the low-temperature stage compressor according to the temperature monitored by the temperature sensor.
As a further improvement of an embodiment of the present invention, the controller is further configured to control the operation state of the high temperature stage compressor and the low temperature stage compressor according to the temperature in the first storage room and the temperature in the second storage room.
As a further improvement of an embodiment of the present invention, the evaporation portion is provided between the high-temperature-stage evaporator and the high-temperature-stage compressor.
As a further improvement of an embodiment of the present invention, the high-temperature stage refrigeration cycle loop is further including locating the evaporation assembly with the high-temperature stage muffler between the high-temperature stage compressor flows through the first refrigerant in the high-temperature stage throttling device and flows through the first refrigerant heat exchange in the high-temperature stage muffler.
As an embodiment of the present invention, the low-temperature stage refrigeration cycle circuit further includes a low-temperature stage compressor, a low-temperature stage throttling device, a low-temperature stage evaporator, and a first return air pipe section, which are serially connected, and the condensation portion is disposed between the low-temperature stage compressor and the low-temperature stage throttling device.
As a further improvement of an embodiment of the present invention, the second refrigerant flowing through the first return-air pipe section exchanges heat with the second refrigerant flowing through the low-temperature stage throttling device.
As a further improvement of an embodiment of the present invention, the low-temperature stage refrigeration cycle loop further includes a second air return pipe section and a heat release pipe section, the second air return pipe section is located the low-temperature stage evaporator with between the low-temperature stage compressor, the heat release pipe section is located the low-temperature stage compressor with between the condensation portion, flow through the second refrigerant in the second air return pipe section and flow through the second refrigerant heat exchange in the heat release pipe section.
As a further improvement of an embodiment of the present invention, the second return air pipe section is located between the first return air pipe section and the low temperature stage compressor.
As a further improvement of an embodiment of the present invention, the second return-air pipe section and the heat-releasing pipe section are mutually sleeved or attached to each other, and the first return-air pipe section and the low-temperature throttling device are mutually sleeved or attached to each other.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a refrigerating plant, when first refrigerant circulates in high-temperature refrigeration cycle circuit, the high-temperature evaporator supplies cold for first storing compartment, the first refrigerant that flows through evaporation department and the second refrigerant heat transfer that flows through the condensation portion, the first refrigerant in the evaporation department can absorb the heat of the second refrigerant that flows through the condensation portion, thereby can further reduce the temperature of the second refrigerant in the condensation portion, for low-temperature refrigeration cycle circuit precooling, thereby make low-temperature refrigeration cycle circuit can realize lower temperature; the high-temperature-level evaporator is attached to the inner container of the first storage room, the temperature sensor is arranged at the inlet of the high-temperature-level evaporator, the temperature in the first storage room can be monitored, and the condensing pressure of the low-temperature-level compressor during starting can be judged through the temperature change at the inlet of the high-temperature-level evaporator.
Drawings
Fig. 1 is a schematic structural view of a cascade compression refrigeration system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings.
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.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described elements should not be limited by these terms. These terms are only used to distinguish these descriptive objects from one another.
An embodiment of the utility model provides a refrigerating plant, including the box and the door body, have the storing compartment in the box, the door body is used for opening or closes the storing compartment, and refrigerating plant still includes refrigerating system, and refrigerating system locates in the box and to the storing compartment cooling. Specifically, the refrigerating device can be set as a refrigerator, a freezer, or the like, so as to meet the requirements of different users and different application scenarios.
In this embodiment, the box body has a first storage chamber and a second storage chamber, the first storage chamber may be a refrigerating chamber or a freezing chamber, and the second storage chamber may be a temperature-changing chamber or a deep-cooling chamber. The refrigerating system adopts a cascade compression refrigerating system 100, and specifically comprises a high-temperature-level refrigerating circulation loop 1 and a low-temperature-level refrigerating circulation loop 2.
For convenience of description, in the present embodiment, the high-temperature-stage refrigeration cycle 1 supplies cold to the first storage compartment, and the low-temperature-stage refrigeration cycle 2 supplies cold to the second storage compartment. Of course, the two may be interchanged.
Of course, in other embodiments, other storage compartments besides the first storage compartment and the second storage compartment may be provided according to actual needs.
Referring to fig. 1, the high-temperature stage refrigeration cycle circuit 1 includes a high-temperature stage compressor 11, a high-temperature stage throttling device 16, and an evaporation assembly, which are connected in series, the evaporation assembly includes a high-temperature stage evaporator 15 and an evaporation portion 12, which are connected in series, and a first refrigerant flows through the high-temperature stage refrigeration cycle circuit 1.
The low-temperature-stage refrigeration cycle circuit 2 includes a low-temperature-stage compressor 22 and a condensing unit 21, a second refrigerant flows through the low-temperature-stage refrigeration cycle circuit 2, and the second refrigerant flowing through the condensing unit 21 exchanges heat with the first refrigerant flowing through the evaporating unit 12.
The high-temperature evaporator 15 is attached to the inner container of the first storage compartment, and the box body further comprises a temperature sensor arranged at an inlet of the high-temperature evaporator 15.
Thus, when the first refrigerant circulates in the high-temperature-stage refrigeration cycle circuit 1, the high-temperature-stage evaporator 15 supplies cold to the first storage compartment, the first refrigerant flowing through the evaporation part 12 exchanges heat with the second refrigerant flowing through the condensation part 21, and the first refrigerant in the evaporation part 12 can absorb heat of the second refrigerant flowing through the condensation part 21, so that the temperature of the second refrigerant in the condensation part 21 can be further reduced, and the low-temperature-stage refrigeration cycle circuit 2 is precooled, so that the low-temperature-stage refrigeration cycle circuit 2 can realize lower temperature; attach in the inner bag of first storing room through high-temperature evaporator 15 and set up temperature sensor in high-temperature evaporator 15 entrance, not only can be right the indoor temperature in first storing room monitors, can judge through the temperature variation of high-temperature evaporator 15 entrance moreover condensing pressure when starting low-temperature compressor.
Further, the high-temperature stage refrigeration cycle loop 1 further comprises a high-temperature stage return pipe 13 arranged between the evaporation assembly and the high-temperature stage compressor 11, and a first refrigerant flowing through the high-temperature stage throttling device 16 exchanges heat with a first refrigerant flowing through the high-temperature stage return pipe 13, so that the first refrigerant in the high-temperature stage throttling device 16 can be cooled by the first refrigerant in the high-temperature stage return pipe 13, the refrigerating capacity is increased, the suction temperature of the high-temperature stage compressor 11 is increased to about the ambient temperature, the refrigerating efficiency of the high-temperature stage compressor 11 is improved, and the working efficiency of the high-temperature stage refrigeration cycle loop 1 is improved, so that the first storage compartment can achieve a temperature range of-30 ℃ to-10 ℃.
Referring to fig. 1, the evaporation portion 12 is provided between the high-temperature stage evaporator 15 and the high-temperature stage compressor 11. Specifically, the evaporation portion 12 is disposed between the high-temperature-stage evaporator 15 and the high-temperature-stage air return pipe 13, so that when the first refrigerant flows through the evaporation portion 12, the amount of cooling exchanged with the condensation portion 21 is large, and the temperature of the second refrigerant in the condensation portion 21 can be greatly reduced, so that the low-temperature-stage refrigeration cycle loop 2 can achieve a lower temperature; then, the first refrigerant flows out from the evaporation portion 12 to the high-temperature-stage evaporator 15 and cools the first storage compartment.
Preferably, the high temperature stage throttling device 16 is a capillary tube.
The high-temperature stage throttling device 16 and the high-temperature stage gas return pipe 13 are in thermal connection in a sleeved or attached mode, so that the heat exchange efficiency of the first refrigerant circulating in the high-temperature stage throttling device and the high-temperature stage gas return pipe is facilitated, and the energy utilization rate is improved.
Further, the high-temperature stage refrigeration cycle circuit 1 further includes a high-temperature stage dry filter 17 provided between the high-temperature stage condenser 14 and the high-temperature stage throttling device 16, and a liquid storage pack 18 provided between the high-temperature stage evaporator 15 and the high-temperature stage return air pipe 13.
The low-temperature stage refrigeration cycle loop 2 includes a low-temperature stage compressor 22, a low-temperature stage throttling device 23, a low-temperature stage evaporator 24 and a first air return pipe section 25 which are arranged in series, and the condensing portion 21 is arranged between the low-temperature stage compressor 22 and the low-temperature stage throttling device 23.
Further, the second refrigerant flowing through the first gas return section 25 exchanges heat with the second refrigerant flowing through the low temperature-stage throttling device 23. Therefore, the second refrigerant flowing through the first gas return pipe section 25 can absorb the heat of the second refrigerant flowing through the low-temperature stage throttling device 23, and the temperature of the second refrigerant flowing to the suction port of the low-temperature stage compressor 22 is increased, so that the suction temperature of the low-temperature stage compressor 22 is increased, the energy utilization rate of the low-temperature stage refrigeration cycle loop 2 is increased, and the energy efficiency of the whole refrigeration device is improved.
Preferably, the low-temperature-stage throttling device 23 is a capillary tube, and the first return air pipe section 25 and the low-temperature-stage throttling device 23 are sleeved or attached to each other, so that the heat exchange efficiency of a second refrigerant circulating in the first return air pipe section and the second return air pipe section is facilitated, and the energy utilization rate is improved.
Further, the low-temperature stage refrigeration cycle circuit 2 further includes a second air return pipe section 26 and a heat release pipe section 27, the second air return pipe section 26 is disposed between the low-temperature stage evaporator 24 and the low-temperature stage compressor 22, the heat release pipe section 27 is disposed between the low-temperature stage compressor 22 and the condensing portion 21, and the second refrigerant flowing through the second air return pipe section 26 exchanges heat with the second refrigerant flowing through the heat release pipe section 27. Therefore, the second refrigerant flowing through the second air return pipe section 26 can absorb the heat of the second refrigerant flowing through the heat release pipe section 27, the air suction temperature of the low-temperature stage compressor 22 is increased, the cold quantity of the second refrigerant flowing from the heat release pipe section 27 to the condensation part 21 is reduced, the low-temperature stage refrigeration cycle loop 2 can achieve lower temperature, the temperature of the second storage compartment can be adjusted within the temperature range of-60 ℃ to-20 ℃, the energy utilization rate of the low-temperature stage refrigeration cycle loop 2 is increased, and the energy efficiency of the whole refrigeration device is improved.
Preferably, the second gas return pipe section 26 is located between the first gas return pipe section 25 and the low temperature stage compressor 22, so that the energy utilization rate of the low temperature stage refrigeration cycle circuit 2 can be maximally improved.
The second return air pipe section 26 and the heat release pipe section 27 are sleeved or attached to each other, so that the heat exchange efficiency of the second refrigerant flowing in the second return air pipe section and the heat release pipe section is improved, and the energy utilization rate is improved.
Further, the low-temperature-stage refrigeration cycle circuit 2 further includes a low-temperature-stage radiating pipe 28 provided between the low-temperature-stage compressor 22 and the heat releasing pipe section 27, and a low-temperature-stage dry filter 29 provided between the condensing portion 21 and the low-temperature-stage throttling device 23. The second refrigerant flowing out of the low-temperature-stage compressor 22 can be radiated by the low-temperature-stage radiating pipe 28, so that the low-temperature-stage refrigeration cycle 2 can achieve a lower temperature; the second refrigerant flowing out of the condensing portion 21 may be dried and filtered by the low-temperature stage filter-drier 29.
The first refrigerant and the second refrigerant may be the same refrigerant or different refrigerants.
In addition, "high temperature" and "low temperature" in the "high temperature stage refrigeration cycle circuit 1" and the "low temperature stage refrigeration cycle circuit 2" are relative terms, and the evaporation temperature of the first refrigerant flowing through the high temperature stage refrigeration cycle circuit 1 is relatively higher than the evaporation temperature of the second refrigerant flowing through the low temperature stage refrigeration cycle circuit 2.
Preferably, the high-temperature-stage compressor 11 and the low-temperature-stage compressor 22 are both variable-frequency compressors, so that the operating frequencies of the high-temperature-stage compressor 11 and the low-temperature-stage compressor 22 can be adjusted according to the temperatures of different storage compartments, and the high-temperature-stage refrigeration cycle loop 1 and the low-temperature-stage refrigeration cycle loop 2 can generate the cold energy required by the corresponding storage compartments, so as to prevent the operating pressure of the refrigeration system from being too high.
Further, the refrigeration device further comprises a controller, wherein the controller is connected with the temperature sensor and is used for controlling the operation state of the low-temperature stage compressor 22 according to the temperature monitored by the temperature sensor.
Further, the controller is further configured to control the operation states of the high-temperature stage compressor 11 and the low-temperature stage compressor 22 according to the temperature in the first storage compartment and the temperature in the second storage compartment.
In particular, the controller is configured to,
temperature T in the second storage room 2 >It presets a starting temperature T 2-opening When the temperature is high, the high-temperature stage compressor 11 is controlled to start;
after the preset time t1, the low-temperature stage compressor 22 is controlled to start, the temperature Tz at the inlet of the high-temperature stage evaporator 15 is monitored in real time, and the temperature is judged within the preset time t2 from the start of the low-temperature stage compressor 22
Whether it is greater than Tz0, wherein,
is the average value of Tz within a preset time t 2;
if yes, the low-temperature stage compressor 22 is controlled to stop.
Low-temperature stage compressor 22 starts the initial stage, low-temperature stage refrigeration cycle circuit 2's evaporating pressure is great, the second refrigerant flow that circulates in wherein is great, the heat dissipation capacity of condensing part 21 is great, behind the first refrigerant absorption condensing part 21 second refrigerant that circulates among the evaporation department 12 in the evaporation department, rapid overheat intensification, thereby make the temperature of the first refrigerant of high temperature compartment evaporimeter 15 entrance higher, through starting to low-temperature stage compressor 22 and beginning to monitor and control low-temperature stage compressor 22 starting pressure in the temperature of high temperature compartment evaporimeter 15 entrance in presetting time t2, thereby can avoid the big problem of condensing pressure when low-temperature stage compressor 22 starts.
Preferably, t1= 5-20 min, which not only enables the evaporation part 12 to provide enough cold for the low-temperature-level refrigeration cycle loop 2 in advance, but also avoids that the second storage compartment cannot be cooled down for a long time.
Preferably, t2= 1-10 min, so that the temperature at the inlet of the high-temperature compartment evaporator 15 at the initial start of the low-temperature stage compressor 22 can be monitored and judged to avoid the excessive condensation pressure when the low-temperature stage compressor 22 is started.
Preferably, tz0=20 to 50 ℃, so that excessive condensing pressure at the start of the low temperature stage compressor 22 can be avoided.
Further, the controller is also configured to,
after the low-temperature stage compressor 22 is controlled to stop, after a preset time t3, the low-temperature stage compressor 22 is controlled to start, and the starting of the low-temperature stage compressor 22 is judged within a preset time t2
Whether it is greater than Tz0;
if so, the low-temperature stage compressor 22 is controlled to stop.
That is, if the preset time t2 is not reached
The low-temperature stage compressor 22 is controlled to be stopped for a preset time t3 so that the condensing pressure of the low-temperature stage refrigeration cycle circuit 2 is reduced, and then the low-temperature stage compressor 22 is controlled to be started, so that the refrigeration system can be normally operated.
Preferably, t3= 3-10 min, on the one hand, the condensing pressure of the low-temperature-level refrigeration cycle circuit 2 can be effectively reduced, and on the other hand, the situation that the second storage compartment cannot be cooled for a long time can be avoided.
Further, the controller is also configured to,
after a preset time T4 from the start of the low temperature stage compressor 22, if T is up 2 Less than or equal to preset shutdown temperature T of second storage compartment 2 guan (a) Then the low-temperature stage compressor 22 is controlled to stop and the temperature T in the first storage room is judged 1 Whether a first preset condition is met or not;
if yes, controlling the high-temperature stage compressor 11 to stop;
wherein the first preset condition is as follows: t is 1 ≤T 1 off Or, the preset shutdown temperature T of the first storage compartment 1 off <T 1 <T 1 opener And T is shown within T4 1 ≤T 1 off 。
In this way, by controlling the operation time of the low temperature-stage compressor 22, the operation state of the low temperature-stage compressor 22 is controlled according to the temperature in the second storage compartment, and the operation state of the high temperature-stage compressor 11 is controlled according to the temperature in the first storage compartment.
Preferably, t4= 5-40 min, on one hand, certain cooling of the second storage compartment can be ensured, and meanwhile, the situation that the first storage compartment cannot be cooled for a long time is avoided.
Further, the controller is also configured to,
after the low temperature stage compressor 22 stops, if T 1 If the second preset condition is met, controlling the high-temperature stage compressor 11 to continue to operate;
wherein the second preset condition is: t is 1 ≥T 1 on Or, alternatively, T 1 guan <T 1 <T 1 opener And T within preset time T4 1 Is always greater than T 1 off 。
That is, after the low-temperature stage compressor 22 is stopped, if the temperature in the first storage compartment is still high and cooling is needed, the high-temperature stage compressor 11 is controlled to continue to operate to continue cooling the first storage compartment to reach the preset temperature.
Further, the controller is also configured to,
after a preset time T4, if T 2 >T 2 off The run time of the low temperature stage compressor 22 is re-timed.
That is, after the preset time t4, if the temperature in the second storage compartment has not decreased to the preset shutdown temperature, the operation time of the low-temperature-stage compressor 22 is counted again, so that the low-temperature-stage refrigeration cycle loop 2 continues to cool the second storage compartment, and the second storage compartment reaches the preset temperature as soon as possible.
The utility model also provides a control method of the refrigerating device, which comprises the following steps,
temperature T in the second storage room 2 >It presets a starting temperature T 2-opening When the temperature is higher than the set temperature, the high-temperature stage compressor 11 is controlled to start;
after the preset time t1, the low-temperature stage compressor 22 is controlled to start, the temperature Tz at the inlet of the high-temperature stage evaporator 15 is monitored in real time, and the temperature is judged within the preset time t2 from the start of the low-temperature stage compressor 22
Whether greater than Tz0, wherein,
is the average value of Tz within a preset time t 2;
if yes, the low-temperature stage compressor 22 is controlled to stop.
In the initial stage of starting the low-temperature stage compressor 22, the evaporating pressure of the low-temperature stage refrigeration cycle loop 2 is high, the flow of the second refrigerant flowing in the low-temperature stage refrigeration cycle loop is high, the heat dissipation capacity of the condensing portion 21 is high, after the first refrigerant flowing in the evaporating portion 12 absorbs the heat of the second refrigerant flowing in the condensing portion 21, the first refrigerant is quickly overheated, so that the temperature of the first refrigerant at the inlet of the high-temperature chamber evaporator 15 is high, the starting pressure of the low-temperature stage compressor 22 is monitored and controlled by monitoring the temperature at the inlet of the high-temperature chamber evaporator 15 within the preset starting time t2 of the low-temperature stage compressor 22, and the problem of high condensing pressure when the low-temperature stage compressor 22 is started can be avoided.
Preferably, t1= 5-20 min, which not only enables the evaporation part 12 to provide enough cold for the low-temperature-level refrigeration cycle loop 2 in advance, but also avoids that the second storage compartment cannot be cooled down for a long time.
Preferably, t2= 1-10 min, so that the temperature at the inlet of the high-temperature compartment evaporator 15 at the initial start of the low-temperature stage compressor 22 can be monitored and judged to avoid the excessive condensation pressure when the low-temperature stage compressor 22 is started.
Preferably, tz0=20 to 50 ℃, so that excessive condensing pressure at the start of the low temperature stage compressor 22 can be avoided.
Further, the control method may further include,
after the low-temperature stage compressor 22 is controlled to stop, after the preset time t3, the control is carried outThe low-temperature stage compressor 22 is started and it is judged that the preset time t2 is elapsed from the start of the low-temperature stage compressor 22
Whether it is greater than Tz0;
if yes, the low-temperature stage compressor 22 is controlled to stop.
That is, if the preset time t2 is not reached
The low-temperature stage compressor 22 is controlled to be stopped for a preset time t3 so that the condensing pressure of the low-temperature stage refrigeration cycle circuit 2 is reduced, and then the low-temperature stage compressor 22 is controlled to be started, so that the refrigeration system can be normally operated.
Preferably, t3= 3-10 min, on the one hand, can effectively reduce the condensation pressure of the low-temperature-level refrigeration cycle circuit 2, and on the other hand, can prevent the second storage compartment from being unable to supply cold for a long time.
Further, the control method may further include,
after a preset time T4 from the start of the low temperature stage compressor 22, if T is up 2 Less than or equal to preset shutdown temperature T of second storage compartment 2 off Then the low-temperature stage compressor 22 is controlled to stop and the temperature T in the first storage room is judged 1 Whether a first preset condition is met or not;
if yes, controlling the high-temperature stage compressor 11 to stop;
wherein the first preset condition is as follows: t is 1 ≤T 1 off Or the preset shutdown temperature T of the first storage chamber 1 off <T 1 <T 1 opener And T is shown within T4 1 ≤T 1 off 。
In this way, by controlling the operation time of the low temperature-stage compressor 22, the operation state of the low temperature-stage compressor 22 is controlled according to the temperature in the second storage compartment, and the operation state of the high temperature-stage compressor 11 is controlled according to the temperature in the first storage compartment.
Preferably, t4= 5-40 min, on one hand, certain cooling of the second storage compartment can be ensured, and meanwhile, the situation that the first storage compartment cannot be cooled for a long time is avoided.
Further, the control method may further include,
after the low temperature stage compressor 22 stops, if T 1 If the second preset condition is met, controlling the high-temperature stage compressor 11 to continue to operate;
wherein the second preset condition is that: t is 1 ≥T 1 on Or, alternatively, T 1 off <T 1 <T 1 on And T within preset time T4 1 Is always greater than T 1 off 。
That is, after the low-temperature stage compressor 22 is stopped, if the temperature in the first storage compartment is still high and cooling is needed, the high-temperature stage compressor 11 is controlled to continue to operate to continue cooling the first storage compartment to reach the preset temperature.
Further, the control method may further include,
after a preset time T4, if T 2 >T 2 off The run time of the low temperature stage compressor 22 is re-timed.
That is, after the preset time t4, if the temperature in the second storage compartment has not decreased to the preset shutdown temperature, the operation time of the low-temperature-stage compressor 22 is counted again, so that the low-temperature-stage refrigeration cycle loop 2 continues to cool the second storage compartment, and the second storage compartment reaches the preset temperature as soon as possible.
Compared with the prior art, the utility model provides a refrigerating plant and refrigerating plant's control method, its beneficial effect lies in: when a first refrigerant circulates in the high-temperature-stage refrigeration cycle circuit 1, the high-temperature-stage evaporator 15 supplies cold to the first storage compartment, the first refrigerant flowing through the evaporation part 12 exchanges heat with a second refrigerant flowing through the condensation part 21, and the first refrigerant in the evaporation part 12 can absorb heat of the second refrigerant flowing through the condensation part 21, so that the temperature of the second refrigerant in the condensation part 21 can be further reduced, and the second refrigerant is precooled for the low-temperature-stage refrigeration cycle circuit 2, so that the low-temperature-stage refrigeration cycle circuit 2 can realize lower temperature; attach in the inner bag of first storing room through high-temperature evaporator 15 and set up temperature sensor in high-temperature evaporator 15 entrance, not only can be right the indoor temperature in first storing room monitors, can judge through the temperature variation of high-temperature evaporator 15 entrance moreover condensing pressure when starting low-temperature compressor.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
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 refrigeration device, comprising,
the high-temperature refrigeration circulating loop comprises a high-temperature compressor, a high-temperature throttling device and an evaporation assembly which are arranged in series, wherein the evaporation assembly comprises a high-temperature evaporator and an evaporation part which are arranged in series, and a first refrigerant flows in the high-temperature refrigeration circulating loop;
the low-temperature stage refrigeration circulation loop comprises a low-temperature stage compressor and a condensation part, wherein a second refrigerant flows in the low-temperature stage refrigeration circulation loop, and the second refrigerant flowing through the condensation part exchanges heat with the first refrigerant flowing through the evaporation part;
the box wherein has between first storing room and the room between the second storing, high temperature level refrigeration cycle return circuit does between first storing room cooling, low temperature level refrigeration cycle return circuit does between the room cooling of second storing, high temperature level evaporimeter attached in the inner bag of room between first storing, the box still including set up in the temperature sensor of high temperature level evaporimeter entrance.
2. The refrigeration apparatus as claimed in claim 1, further comprising a controller connected to the temperature sensor and configured to control an operation state of the low temperature stage compressor according to the temperature monitored by the temperature sensor.
3. A cold appliance according to claim 2, wherein the controller is further adapted to control the operating state of the high temperature stage compressor and the low temperature stage compressor based on the temperature in the first storage compartment and the temperature in the second storage compartment.
4. A cold appliance according to claim 1, wherein the evaporator is provided between the high temperature stage evaporator and the high temperature stage compressor.
5. The refrigeration apparatus of claim 1, wherein the high temperature stage refrigeration cycle further includes a high temperature stage return line disposed between the evaporator assembly and the high temperature stage compressor, and wherein the first refrigerant flowing through the high temperature stage throttling device exchanges heat with the first refrigerant flowing through the high temperature stage return line.
6. The refrigeration apparatus of claim 1, wherein the low-temperature stage refrigeration cycle further comprises a low-temperature stage compressor, a low-temperature stage throttling device, a low-temperature stage evaporator, and a first gas return pipe section arranged in series, and the condensing portion is disposed between the low-temperature stage compressor and the low-temperature stage throttling device.
7. The refrigeration unit of claim 6 wherein the second refrigerant flowing through the first return gas leg exchanges heat with the second refrigerant flowing through the low temperature stage throttling device.
8. The refrigeration apparatus according to claim 6, wherein the low-temperature-stage refrigeration cycle further includes a second gas return pipe section and a heat release pipe section, the second gas return pipe section is disposed between the low-temperature-stage evaporator and the low-temperature-stage compressor, the heat release pipe section is disposed between the low-temperature-stage compressor and the condensation portion, and a second refrigerant flowing through the second gas return pipe section exchanges heat with a second refrigerant flowing through the heat release pipe section.
9. The refrigeration unit of claim 8, wherein the second return gas leg is positioned between the first return gas leg and the low temperature stage compressor.
10. The refrigeration device as recited in claim 8 wherein the second return air pipe section is sleeved or abutted with the heat releasing pipe section, and the first return air pipe section is sleeved or abutted with the low temperature stage throttling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221693239.8U CN218179339U (en) | 2022-06-30 | 2022-06-30 | Refrigerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221693239.8U CN218179339U (en) | 2022-06-30 | 2022-06-30 | Refrigerating device |
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| Publication Number | Publication Date |
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| CN218179339U true CN218179339U (en) | 2022-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221693239.8U Active CN218179339U (en) | 2022-06-30 | 2022-06-30 | Refrigerating device |
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| CN (1) | CN218179339U (en) |
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