CN210374250U - Refrigerating and freezing device - Google Patents
Refrigerating and freezing device Download PDFInfo
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- CN210374250U CN210374250U CN201920870712.7U CN201920870712U CN210374250U CN 210374250 U CN210374250 U CN 210374250U CN 201920870712 U CN201920870712 U CN 201920870712U CN 210374250 U CN210374250 U CN 210374250U
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Abstract
The utility model provides a cold-stored refrigeration device, including box and refrigerating system. The refrigeration system comprises a control valve, a first throttling device, a second throttling device, a third throttling device, a first evaporator and a second evaporator; the control valve is provided with a main inlet, a first outlet and a second outlet so as to controllably communicate the main inlet with the first outlet or communicate the main inlet with the second outlet; the first outlet is communicated with an inlet of the first throttling device; the second outlet is communicated with an inlet of the second throttling device; the inlet of the first evaporator is communicated with the outlet of the first throttling device, and the outlet of the first evaporator is communicated with the inlet of the third throttling device; an inlet of the second evaporator is communicated with an outlet of the second throttling device and an outlet of the third throttling device; and the opening degree of the third throttling device is adjustable. Due to the fact that the third throttling device with the adjustable opening degree is arranged, the temperature of the second evaporator can be dynamically adjusted, the temperature of the freezing evaporator is lower than the cryogenic target temperature during refrigeration, and the cryogenic function is achieved.
Description
Technical Field
The utility model relates to a refrigeration plant technical field especially relates to a cold-stored refrigeration device.
Background
With the development of social economy and the improvement of living standard of people, the refrigerating and freezing device also becomes an indispensable household appliance in daily life of people. For a double-system refrigeration refrigerator, as shown in the attached figure 1, the conventional method is to control the on-off and liquid supply of a refrigerating chamber and a freezing chamber through a three-way electromagnetic valve, and control the flow entering an evaporator through a capillary tube; however, because the temperatures of the two chambers are different, the capillary tube is generally a refrigerating evaporator 50 'with large flow and high evaporation temperature, and a freezing evaporator 60' with small flow and low evaporation temperature in view of energy conservation and heat exchange efficiency; for cryrogenic refrigerator, deep cold room (or cryrogenic compartment) temperature is lower, if the walk-in requires to refrigerate, and the refrigerant is through cold-stored end capillary throttle this moment, and evaporating temperature is higher, further improves the refrigerant temperature through the walk-in heat transfer simultaneously, can lead to evaporating temperature to be higher than cryrogenic target temperature, can't satisfy the refrigeration demand.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made to provide a refrigerating and freezing apparatus which overcomes or at least partially solves the above-mentioned problems to prevent the freezing evaporator temperature from being raised when the refrigerating compartment requires refrigeration, and to achieve a cryogenic target temperature.
Specifically, the utility model provides a cold-stored refrigeration device, including refrigerating system, wherein, refrigerating system includes control flap, first throttling arrangement, second throttling arrangement, third throttling arrangement, first evaporimeter and second evaporimeter;
the control valve is provided with a main inlet, a first outlet and a second outlet so as to controllably communicate the main inlet with the first outlet or communicate the main inlet with the second outlet;
the first outlet is communicated with an inlet of the first throttling device;
the second outlet is communicated with the inlet of the second throttling device;
the inlet of the first evaporator is communicated with the outlet of the first throttling device, and the outlet of the first evaporator is communicated with the inlet of the third throttling device;
an inlet of the second evaporator is communicated with an outlet of the second throttling device and an outlet of the third throttling device; and is
The opening degree of the third throttling device is adjustable.
Optionally, the refrigeration system further comprises a compressor and a condenser;
the outlet of the compressor is communicated with the inlet of the condenser;
the outlet of the condenser is communicated with the main inlet of the control valve;
the outlet of the second evaporator is communicated with the inlet of the compressor.
Optionally, the flow rate of the first throttling means is greater than the flow rate of the second throttling means.
Optionally, the first throttling means and the second throttling means are both capillary tubes;
the third throttling device is an electronic expansion valve.
Optionally, the refrigeration and freezing device further comprises a box body,
the refrigerating system is arranged in the box body;
a refrigerating chamber and a freezing chamber are arranged in the box body; the first evaporator is configured to provide cooling energy to the refrigerating chamber; the second evaporator is configured to provide cooling energy to the refrigerated compartment.
Optionally, the pipeline connected to the inlet of the compressor is a compressor return pipe, and the pipeline connected to the outlet of the condenser is a condenser outlet pipe;
the refrigerating and freezing device also comprises a heat pipe heat transfer device with a valve;
the evaporation end of the heat pipe heat transfer device is thermally connected with the outlet pipe of the condenser, and the condensation end of the heat pipe heat transfer device is thermally connected with the air return pipe of the compressor; and the valve is configured to be controllably opened or closed.
Optionally, the evaporation end is wound around the condenser outlet pipe;
the condensation end is wound on the compressor return air pipe.
The utility model discloses an among the cold-stored refrigerating plant, owing to have aperture adjustable third throttling arrangement, can dynamically regulated second evaporator temperature, the freezing evaporator temperature is less than cryrogenic target temperature when realizing cold-stored refrigeration, realizes cryrogenic function.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural view of a refrigeration system of a conventional refrigerator;
FIG. 2 is a schematic diagram of the change in chamber temperature and evaporator temperature during operation of the refrigerator of FIG. 1;
FIG. 3 is a schematic diagram of an operation of the refrigerator shown in FIG. 1;
fig. 4 is a schematic block diagram of a refrigeration system of a refrigeration chiller according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an operation of the refrigeration freezer of fig. 4.
Detailed Description
For the refrigerating system of the conventional dual-system series refrigerator, as shown in fig. 1 to 3, when the refrigerating chamber and the deep cooling chamber are simultaneously refrigerated, the channels a-b of the solenoid valve 40 'are opened, the channels a-c are closed, the first capillary tube 31' is throttled, and the throttled refrigerant passes through the refrigerating evaporator 50 'and then the freezing evaporator 60', so that the refrigerating and freezing are simultaneously refrigerated. When the temperature of the refrigerating chamber meets the requirement and the temperature of the freezing chamber does not meet the requirement, the channels a-b and a-c of the electromagnetic valve 40 'are closed and opened, the second capillary tube 32' is throttled, and the freezing chamber is independently refrigerated. However, since the refrigerating evaporation temperature is higher when passing through the first capillary tube 31' than when the second capillary tube 32' is operated, the refrigerating evaporator 60' is raised when the refrigerating chamber requires refrigeration, as shown in fig. 2. Further, in fig. 1, 20 'is a compressor, and 30' is a condenser. The solenoid valve 40' may be an electronically switched valve.
When the cryogenic chamber is used for refrigerating alone, the second capillary tube 32' is throttled, the freezing evaporation temperature is low, the temperature is reduced to be close to the cryogenic target temperature, but the temperature of the refrigerating chamber reaches a starting point, the electronic switching valve is switched to the first capillary tube 31' to work, the freezing evaporator in the section t1-t2 in the picture 2 is increased to be higher than the cryogenic target temperature due to the fact that the flow is larger than the second capillary tube 32', the freezing fan works continuously at the moment, the refrigerating purpose cannot be achieved, and the temperature of the freezing chamber is increased; when the temperature of the refrigerating chamber reaches the target temperature, the electronic switching valve is switched to the second capillary tube 32' to work, the temperature of the freezing evaporator is reduced below the target temperature, and the temperature of the deep cooling chamber is reduced. The deep cooling chamber circularly refrigerates and heats according to the above state, and the deep cooling target temperature can not be reached all the time.
Fig. 4 is a schematic structural view of a refrigeration system of a refrigeration and freezing apparatus according to an embodiment of the present invention. As shown in fig. 4, an embodiment of the present invention provides a refrigerating and freezing apparatus, which includes a box body and a refrigerating system. The refrigeration system comprises a control valve 40, a first throttle device 31, a second throttle device 32, a third throttle device 33, a first evaporator 50 and a second evaporator 60. The control valve 40 has a main inlet a, a first outlet b, and a second outlet c to controllably communicate the main inlet a with the first outlet b or communicate the main inlet a with the second outlet c. The first outlet b communicates with the inlet of the first throttle means 31. The second outlet c communicates with the inlet of the second restriction 32. The inlet of the first evaporator 50 communicates with the outlet of the first throttling means 31 and the outlet of the first evaporator 50 communicates with the inlet of the third throttling means 33. The inlet of the second evaporator 60 communicates the outlet of the second throttling means 32 and the outlet of the third throttling means 33. The opening degree of the third throttling means 33 is adjustable.
In some embodiments of the present invention, the flow rate of the first throttling device 31 is greater than the flow rate of the second throttling device 32. The first throttle 31 and the second throttle 32 are both capillary tubes. The third throttling means 33 is an electronic expansion valve. The refrigeration system also includes a compressor 20 and a condenser 30. The outlet of the compressor 20 communicates with the inlet of the condenser 30. The outlet of the condenser 30 communicates with the general inlet a of the control valve 40. The outlet of the second evaporator 60 communicates with the inlet of the compressor 20.
The refrigerating system is arranged in the box body. A refrigerating chamber and a freezing chamber are arranged in the box body. The first evaporator 50 is configured to provide cooling energy to the refrigeration compartment. The second evaporator 60 is configured to provide cooling energy to the refrigeration compartment. The first evaporator 50 may also be referred to as a refrigerating evaporator and the second evaporator 60 may also be referred to as a freezing evaporator.
When cold-stored, cryrogenic room is cryogenic simultaneously, first export b is opened, and second export c is closed, and the throttling cooling of first throttling arrangement 31 adjusts third throttling arrangement 33 flow simultaneously, satisfies under the cold-storage room cooling demand prerequisite, reduces freezing evaporimeter temperature, realizes cryrogenic refrigeration function. When the refrigeration meets the requirement of characteristic temperature, and the deep cooling chamber needs refrigeration independently, the first outlet b is closed, the second outlet c is opened, the second throttling device 32 throttles and cools, the flow is small, the freezing evaporation temperature is low, the refrigeration requirement of the deep cooling chamber is met, and the system can reach the deep cooling target temperature quickly.
Specifically, as shown in fig. 3 and 5, with the prior art, as shown in fig. 1, the pressure drop after throttling of the refrigeration capillary, i.e., the first capillary 31' and the first throttling device 31, is P1-P2, where P2 is P3 and TR is TF. In the present technology, as shown in fig. 4, assuming that the compression ratio is the same and the discharge pressure is the same, the capillary tube specification in fig. 4 is the same as that in fig. 1, and an electronic expansion valve is added between the refrigeration evaporator and the freezing evaporator to restrict the flow of the refrigerant in the refrigeration evaporator R, so that P2 becomes larger than that in fig. 1, P1 does not change, P1-P2 become smaller, and TR, namely, the refrigeration evaporator temperature, rises. Comparing FIG. 1, P1-P3> P1-P2, resulted in a decrease in TF, i.e., the temperature of the cryoevaporator.
Furthermore, when refrigerating and freezing are carried out simultaneously, the temperature difference between the inlet and the outlet is calculated through temperature sensors arranged at the inlet and the outlet of the refrigerating evaporator and the freezing evaporator, whether the refrigerant in the system evaporator is sufficient is judged, and then the temperature of the refrigerating evaporator and the temperature of the freezing evaporator are adjusted through the opening adjustment of the electronic expansion valve, so that the temperature rise problem of the freezing evaporator during refrigerating of the refrigerating chamber is solved. That is to say, the utility model discloses when considering that current refrigerator dual system series system realizes cryrogenic function, because the walk-in refrigeration can lead to freezing evaporimeter temperature to rise, influence cryrogenic room refrigeration effect. The evaporation temperature is controlled by adding a throttling device such as a capillary tube or an electronic expansion valve between the refrigeration evaporator and the freezing evaporator, so that the freezing evaporator is not influenced by the refrigeration evaporation temperature and can be always stabilized in a low-temperature state, and the cryogenic control target of a freezing chamber is realized.
In some embodiments of the present invention, the pipeline connected to the inlet of the compressor 20 is a compressor return pipe, and the pipeline connected to the outlet of the condenser 30 is a condenser outlet pipe. The refrigerating and freezing device also comprises a heat pipe heat transfer device with a valve. The evaporating end of the heat pipe heat transfer device is thermally connected with the outlet pipe of the condenser, and the condensing end of the heat pipe heat transfer device is thermally connected with the return pipe of the compressor. And the valve is configured to be controllably opened or closed. In this embodiment, the opening and closing of the valve controls whether or not heat exchange is performed between the refrigerant that has not entered the throttle device after flowing out of the condenser 30 and the refrigerant that has not entered the compressor 20 after flowing out of the evaporator. That is, the heat pipe has a control valve for controlling the flow of the refrigerant and the refrigerant. That is, the refrigerant that has not entered the expansion device after flowing out of the condenser 30 and has not entered the compressor 20 can be heat-exchanged with the refrigerant that has not entered the compressor 20, if necessary. Similarly, the refrigerant that has not entered the expansion device after flowing out of the condenser 30 and the refrigerant that has not entered the compressor 20 may not exchange heat with each other as needed.
In this embodiment, the heat pipe is disposed between the outlet of the condenser 30 and the outlet of the low-pressure return pipe, and the heat at the outlet of the condenser 30 is transferred to the return pipe end of the low-pressure return pipe by the heat pipe, so as to achieve efficient heat dissipation of the condenser 30, preheating of the low-pressure return pipe, and improvement of the efficiency of the compressor 20 and the refrigeration effect of the refrigerating device. And to impede such heat transfer when it is not necessary to transfer heat from the outlet end of the condenser 30 to the return air tube end of the low pressure tube, resulting in an overall increase in the energy efficiency of the refrigeration chiller.
Preferably, the evaporation end is wound around the condenser outlet pipe. The condensing end is wound on the compressor return pipe. Further, heat-conducting daub can be added for fixing. In some alternative embodiments of the present invention, the sleeve structure may also be utilized to achieve heat exchange between the evaporation end and the outlet pipe of the condenser, and to achieve heat exchange between the condensation end and the return pipe of the compressor.
In some embodiments of the present invention, the refrigeration and freezing apparatus further comprises an ambient temperature detection device and a condenser temperature detection device. The ambient temperature detection device is configured to detect an ambient temperature to obtain a first temperature. The condenser temperature detecting means is configured to detect the temperature of the condenser 30 to obtain a second temperature, so that the refrigerating and freezing device controls the above-mentioned valve at least according to the ambient temperature and the temperature of the condenser 30. For example, when the second temperature is lower than the first temperature and the first temperature is higher than the preset temperature, or when the second temperature is higher than the first temperature, the refrigerant that has not entered the throttling device after flowing out of the condenser 30 exchanges heat with the refrigerant that has not entered the compressor 20 after flowing out of the evaporator by the controllable heat exchange device. And when the second temperature is less than the first temperature and the first temperature is less than the preset temperature, the controllable heat exchange device is used for preventing the heat exchange between the refrigerant which flows out of the condenser 30 and does not enter the throttling device and the refrigerant which flows out of the evaporator and does not enter the compressor 20.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (7)
1. A cold storage and refrigeration device comprises a refrigeration system, and is characterized in that the refrigeration system comprises a control valve, a first throttling device, a second throttling device, a third throttling device, a first evaporator and a second evaporator;
the control valve is provided with a main inlet, a first outlet and a second outlet so as to controllably communicate the main inlet with the first outlet or communicate the main inlet with the second outlet;
the first outlet is communicated with an inlet of the first throttling device;
the second outlet is communicated with the inlet of the second throttling device;
the inlet of the first evaporator is communicated with the outlet of the first throttling device, and the outlet of the first evaporator is communicated with the inlet of the third throttling device;
an inlet of the second evaporator is communicated with an outlet of the second throttling device and an outlet of the third throttling device; and is
The opening degree of the third throttling device is adjustable.
2. A refrigerator-freezer according to claim 1, wherein the refrigeration system further comprises a compressor and a condenser;
the outlet of the compressor is communicated with the inlet of the condenser;
the outlet of the condenser is communicated with the main inlet of the control valve;
the outlet of the second evaporator is communicated with the inlet of the compressor.
3. A refrigerator-freezer according to claim 1,
the flow rate of the first throttling device is larger than that of the second throttling device.
4. A refrigerator-freezer according to claim 3,
the first throttling device and the second throttling device are both capillary tubes;
the third throttling device is an electronic expansion valve.
5. A refrigerator-freezer according to claim 1, further comprising a cabinet,
the refrigerating system is arranged in the box body;
a refrigerating chamber and a freezing chamber are arranged in the box body; the first evaporator is configured to provide cooling energy to the refrigerating chamber; the second evaporator is configured to provide cooling energy to the refrigerated compartment.
6. A refrigerator-freezer according to claim 2,
the pipeline connected to the inlet of the compressor is a compressor muffler, and the pipeline connected to the outlet of the condenser is a condenser outlet pipe;
the refrigerating and freezing device also comprises a heat pipe heat transfer device with a valve;
the evaporation end of the heat pipe heat transfer device is thermally connected with the outlet pipe of the condenser, and the condensation end of the heat pipe heat transfer device is thermally connected with the air return pipe of the compressor; and the valve is configured to be controllably opened or closed.
7. A refrigerator-freezer according to claim 6,
the evaporation end is wound on the outlet pipe of the condenser;
the condensation end is wound on the compressor return air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920870712.7U CN210374250U (en) | 2019-06-11 | 2019-06-11 | Refrigerating and freezing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920870712.7U CN210374250U (en) | 2019-06-11 | 2019-06-11 | Refrigerating and freezing device |
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| CN210374250U true CN210374250U (en) | 2020-04-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413916A (en) * | 2020-11-16 | 2021-02-26 | 中科赛凌（北京）科技有限公司 | Cold and hot gas injection device |
| WO2023142952A1 (en) * | 2022-01-25 | 2023-08-03 | 青岛海尔电冰箱有限公司 | Refrigerating and freezing device and control method therefor |
-
2019
- 2019-06-11 CN CN201920870712.7U patent/CN210374250U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413916A (en) * | 2020-11-16 | 2021-02-26 | 中科赛凌（北京）科技有限公司 | Cold and hot gas injection device |
| WO2023142952A1 (en) * | 2022-01-25 | 2023-08-03 | 青岛海尔电冰箱有限公司 | Refrigerating and freezing device and control method therefor |
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