CN214620257U - Super economizer of merchant of cold-storage and condensation heat accumulation - Google Patents
Super economizer of merchant of cold-storage and condensation heat accumulation Download PDFInfo
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- CN214620257U CN214620257U CN202120413397.2U CN202120413397U CN214620257U CN 214620257 U CN214620257 U CN 214620257U CN 202120413397 U CN202120413397 U CN 202120413397U CN 214620257 U CN214620257 U CN 214620257U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The utility model discloses a super economizer of merchant of cold-storage and condensation heat accumulation, wind channel (1), cold-storage device (2) and heat accumulation material (4) etc. behind evaporimeter (7), condenser (5), compressor (6), throttling arrangement (3), fan (8), freezer. By adding the heat storage type condenser into the refrigerating system of the refrigerator, the condensing temperature is reduced, and the energy-saving effect is achieved. The cold accumulation device is adopted, so that the problem of temperature rise in the refrigerator when the system is shut down and defrosted is solved, and the system can be shut down to dissipate heat in the heat accumulation material when the heat accumulation material is saturated. The cold accumulation device and the heat accumulation type condenser are simultaneously applied to the system, and the problem that the heat accumulation effect of the heat accumulation type condenser is limited by the using amount of the heat accumulation material can be solved. The utility model discloses simple structure can compensate the problem that heat accumulation type condenser energy-conserving effect is subject to the heat accumulation material quantity, improves the power consumption structure to filling the millet with shifting the peak simultaneously, keeps having certain improvement in the aspect of food quality etc..
Description
Technical Field
The utility model relates to a super refrigeration plant technical field of merchant, in particular to cold-storage device and heat accumulation type condenser's comprehensive application.
Background
As the consumer concept of the residents changes, health, freshness and greenness are beginning to be emphasized. With the trend, the number and the volume of the commercial ultra-cold chain equipment are increasing, and the proportion of energy consumption to the power consumption of supermarkets is also increasing. Therefore, how to modify the traditional refrigeration equipment to enlarge the energy-saving effect and not influence the refrigeration effect is the problem to be solved at present.
In the past decade, PCM usage in heat exchangers or cold rooms of domestic refrigerators has increased dramatically. Most of the studies in the publications discuss the use of PCMs in evaporators or cold rooms. Generally, integration of PCMs into the cold room or directly into the evaporator reduces energy consumption, but causes cold room temperature fluctuations, with significant potential for performance improvement when implemented in refrigerated cabinets as compared to conventional systems.
According to research, different materials (water, paraffin and high molecular compounds) added into the condenser can obviously reduce the condensation temperature of the household refrigerator, and correspondingly reduce the energy consumption.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the problem that the running energy loss of the system is large is solved through the condenser integrated heat storage material by transforming the original refrigeration system is provided. The problem of temperature rise in the refrigerator when the refrigeration system stops defrosting can be solved by connecting the evaporator and the cold accumulation device in parallel, and the quality of food is ensured. Meanwhile, the problem that the energy-saving effect of the heat storage type condenser is limited by the using amount of the heat storage material can be relieved.
Regarding the heat storage type condenser, the heat dissipation process of the condenser can be optimized by integrating the heat storage material on the outer side of the condenser, when the load is large in the starting-up stage, the heat storage material is utilized to absorb partial heat, the condensing temperature of the system during operation is reduced, and the stored heat is released when the system is stopped, so that the effect of saving energy consumption is achieved. In the design, the heat storage material (the composite phase change energy storage material of the industrial paraffin and the expanded graphite) is wrapped outside the condenser pipeline, so that the heat storage material is in direct contact with the condenser. The phase-change heat storage material can absorb the paraffin by utilizing the porosity of the expanded graphite, so that the original form of the paraffin can not be lost when the phase change occurs, and the appearance can be kept stable.
In the present configuration, the cold storage device is connected in parallel with the evaporator, and the refrigerant vapor from the expansion device flows into the evaporator and the cold storage device by being split. A temperature controller is arranged in the freezing chamber, and when the temperature is lower than the set temperature, the refrigerant vapor does not flow into the evaporator any more, but directly flows into the evaporator.
A kind of cold-storage and condensation heat-storage business exceed the energy-saving appliance, including evaporator 7, condenser 5, compressor 6, throttling set 3, blower 8, air channel 1 behind the freezer, cold-storage device 2 and heat-storage material 4; a compressor 6 of the refrigerator is connected with a condenser 5, the outside of the condenser 5 is wrapped with a heat storage material 4, and the condenser 5 is respectively connected with a cold storage device 2 and an evaporator 7; the evaporator 7 is connected with the cold accumulation device 2 through a fan 8, and the cold accumulation device 2 is connected with the refrigerator rear air duct 1; a throttling device 3 is arranged between the condenser 5 and the cold accumulation device 2.
The cold storage device 2 and the evaporator 7 are connected in parallel.
A part of the refrigerant passing through the compressor 6 enters the cold storage device 2, and the other part enters the evaporator 7; the refrigerant in the cold storage device 2 and the evaporator 7 respectively flow into the compressor 6.
Taking CH because the temperature in the refrigerator is lower than 0 DEG C3CH2Aqueous OH solution and NH3The mixed solution of CL water solution is used as cold accumulating material to prevent liquid leakage of phase change cold accumulating material, and high water absorbing resin (SAP) is added to make the solution become viscous. The cold storage device 2 adopts a cuboid vertical tank, and CH is filled in the cuboid vertical tank3CH2Aqueous OH solution and NH3The mixed solution of the CL aqueous solution is inserted into the serpentine heat exchanger, and the refrigerant flows through the serpentine heat exchanger.
In order to ensure the internal heat exchange of the whole cold accumulation device 2 is sufficient, aluminum foil is integrated outside the coiled pipe type heat exchanger.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
1. this design can reduce the condensation temperature through add heat accumulation type condenser in freezer refrigerating system, plays energy-conserving effect. Meanwhile, the cold accumulation device is adopted, so that the problem of temperature rise in the refrigerator when the system is shut down to defrost can be solved, and the system can be shut down to dissipate heat in the heat accumulation material when the heat accumulation material is saturated.
2. The cold accumulation device and the heat accumulation type condenser are simultaneously applied to the system, and the problem that the heat accumulation effect of the heat accumulation type condenser is limited by the using amount of the heat accumulation material can be solved.
3. The cold accumulation device can relieve the problem of temperature rise in the system when the compressor is stopped.
4. Through the reasonable arrangement of the air duct, the secondary cold accumulation of the cold accumulation device can be realized, and the sufficient cold accumulation amount in the cold accumulation device is ensured.
Drawings
FIG. 1 is a system diagram of a commercial super energy-saving device for cold accumulation and condensation heat accumulation.
FIG. 2 is a system cycle diagram illustrating compressor operation.
Figure 3 air flow diagram in refrigerator at compressor shutdown.
Detailed Description
The utility model provides a super economizer of merchant of cold-storage and condensation heat accumulation which characterized in that: the condenser integrated heat storage material and the evaporator integrated cold accumulator are comprehensively applied to the commercial super refrigerator, so that a novel commercial super refrigerating system is formed. The system mainly comprises an evaporator 7, a condenser 5, a compressor 6, a throttling device 3, a fan 8, a refrigerator rear air duct 1, a cold accumulation device 2, a heat accumulation material 4 and the like.
By integrating the heat storage material 4 with the condenser 5, the presence of the heat storage material 4 can also prolong the heat dissipation of the condenser 5 during the shutdown of the compressor 6. That is, the heat dissipation of the condenser 5 is continuous regardless of whether the compressor is turned on or not. When heat rejection occurs during shutdown of the compressor 6, the heat transfer efficiency is higher, which results in a lower condensation temperature, thereby reducing energy consumption. In order to ensure that the heat storage material 4 has smaller contact thermal resistance with the copper pipe of the condenser 5, the heat storage material 4 is directly contacted with the copper pipe of the condenser 5; meanwhile, in order to prevent the heat storage material 4 from leaking and influencing the performance of the whole system, a layer of aluminum film is added on the inner side of the box wall of the condenser 5.
The evaporator 7 is connected with the cold accumulator 2 in parallel, so that when the power failure is exceeded or the defrosting is carried out when the refrigerator system is shut down, the cold accumulation material in the cold accumulator 2 releases the accumulated cold energy into the refrigerator, so as to maintain the constant temperature of the refrigerator and ensure the quality of food. The starting frequency of the compressor can be reduced by the cold accumulation effect without power failure or shutdown defrosting of a refrigerator system, and the energy-saving effect is obvious for the commercial supercooled chain equipment of the fixed-frequency compressor. The cold storage device 2 and the evaporator 7 are connected in parallel. When the compressor 6 operates, the refrigerant passes through the cold accumulation device 2 and the evaporator 7 at the same time, the refrigerant passing through the evaporator 7 mainly plays a role of generating cold for the refrigerator, and the refrigerant passing through the cold accumulation device 2 is mainly used for storing the cold. The flow distribution of the two is carried out through a pressure valve.
In order to ensure that enough cold energy is stored in the cold storage device 2, the air duct 1 of the freezer system is improved, and cold air flowing out of the evaporator 7 firstly flows through the cold storage device 2 to carry out secondary cold storage on the cold air.
When the compressor 6 is operated, the high-temperature and high-pressure refrigerant flowing out of the compressor 6 enters the condenser 5, releases heat to the heat storage material 4 outside the condenser, and simultaneously the heat storage material 4 continuously releases heat to the outside; after flowing out of the condenser 5, the low-temperature high-pressure refrigerant is shunted, one part of the refrigerant flows through the throttling device 3 and enters the cold accumulation device 2 after being subjected to pressure reduction, so that the cold accumulation material in the cold accumulation device generates phase change cold accumulation, and the other part of the refrigerant enters the evaporator 7 after being subjected to pressure reduction through the throttling device 3 to cool hot air flowing in the refrigerator, so that refrigeration is realized; flows out of the evaporator 7 and the cold accumulation device 2, becomes low-temperature and low-pressure refrigerant vapor, and then converges and flows back to the compressor 6, thereby performing reciprocating circulation.
Fig. 1 is a preferred embodiment of the present invention, and the present invention will be further explained with reference to fig. 1.
The composite phase change cold storage material (CH) is measured by a Differential Scanning Calorimeter (DSC) for the cold storage material in the cold storage device3CH2Aqueous OH solution and NH3Mixed solution of CL aqueous solution) has a phase transition latent heat value of 304.00kJ · kg－1The phase transition temperature was-17.10 ℃. When the refrigerator runs stably, the external environment transmits heat into the refrigerator through a box body, a door seam and the like of the refrigerator to form heat load of the refrigerator, so that the heat load of the whole system is increased. The thermal load cycles the ice bin on and off, and during normal operation of the ice bin system, the thermal load within the ice bin is taken by the internal refrigeration system. That is, the cold energy in the cold accumulation device is only used for bearing the heat load in the refrigerator after the compressor is stopped. According to the actual operation of refrigerator-freezer start-stop law, supposing under 25 ℃ operating mode, a certain model refrigerator starts to stop than 1: 1, namely, the starting and stopping time is 12h in 24h respectively, and on the basis, a phase change cold accumulation mode is adopted, aiming at increasing the stopping time. Assuming that the phase change cold storage material can increase the shutdown time by 4h, namely, reduce the startup time by 4h, part of the load of the refrigerator during shutdown is borne by the phase change cold storage material.
Calculating the heat load borne by the refrigerator: the total thermal load q includes: heat leakage q of cabinet1Door opening heat leakage q2Heat of stored material q3Other heat quantity q4。
q＝q1+q2+q3+q4(W)
Based on the steady state process, the door is not opened or closed, and the heat leakage quantity q of the opened door is ignored2Experiment is carried out with the no-load of the refrigerator, and the heat q of the stored material is ignored3Neglecting other heat quantities q4. So that the total heat load q of the refrigerator is q1(W)
Wherein the cabinet body leaks heat q1The heat leakage of the cabinet body is a main component part of heat load and comprises three parts: heat leakage q of cabinet heat insulating layeraHeat leakage q of door sealbAnd cabinet structure heatBridge heat leakage qc. The existing cabinet body is made of heat-insulating material formed by foaming cyclopentane, and heat leakage q of the cabinet body structure is ignoredc. So q is q1＝qa+qb(W)
According to the data, the heat leakage quantity q of the heat insulating layer of the box body is displayedaHeat leakage q of door sealbAbout 30W, yielding q-30W. The total heat quantity Q is Q-Q-T-432 kJ because the selected stop time is prolonged by T-4 h
Considering that the heat storage material is made of inorganic salt, water-absorbing resin and the like, the latent heat of phase change is damaged relative to water, and 40 percent of 333kJ/kg of the latent heat of phase change of water is taken as the latent heat q of the phase change heat storage materialmAnd calculating so that the required mass of the phase change cold storage material is as follows:
M＝Q/qm＝3.3kg
the heat storage type condenser is laid in an air duct of a refrigerator by a conventional method, and a heat storage material is wrapped on a straight pipe section of the condenser by an aluminum foil sheet. The heat storage material is expanded graphite composite industrial paraffin, the heat storage capacity of the heat storage material is more than 90KJ/Kg, and the heat conductivity is more than 0.4W/mk.
The specific working process and working principle are as follows:
when the compressor is operated:
when the compressor is operated as shown in fig. 2, the high-temperature and high-pressure refrigerant flowing out of the compressor 6 enters the condenser 5, and releases heat to the heat storage material 4 outside the condenser while the heat storage material 4 continues to release heat to the outside; after flowing out of the condenser 5, the low-temperature high-pressure refrigerant is shunted, one part of the refrigerant flows through the throttling device 3 and is decompressed and then enters the cold accumulation device 2, so that the cold accumulation material in the cold accumulation device generates phase change cold accumulation, and the other part of the refrigerant flows into the evaporator 7 after being decompressed by the throttling device, so as to cool the hot air flowing in the refrigerator and realize refrigeration; flows out of the evaporator 7 and the cold accumulation device 2, becomes low-temperature and low-pressure refrigerant vapor, and then converges and flows back to the compressor 6, thereby performing reciprocating circulation.
Supplementing: in order to ensure that the cold accumulation device 2 can accumulate enough cold, the cold accumulation device 2 is arranged on the left side of the evaporator 7, so that cold air cooled by the evaporator 7 flows through the cold accumulation device 2 firstly to provide secondary cold for the cold air, and then flows into the refrigerator through the refrigerator rear air channel.
After the compressor is stopped:
after the compressor stops operating as shown in fig. 3, the evaporator 2 will not generate cold, at this time, the fan 8 is started to drive the air in the air duct to flow, the hot air generated in the refrigerator flows through the cold accumulation device 2 via the fan 8, and then flows back to the refrigerator via the back air duct 1, so as to ensure the continuous low temperature in the refrigerator.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a super economizer of merchant of cold-storage and condensation heat accumulation which characterized in that: comprises an evaporator (7), a condenser (5), a compressor (6), a throttling device (3), a fan (8), a refrigerator rear air duct (1), a cold accumulation device (2) and a heat accumulation material (4); a compressor (6) of the refrigerator is connected with a condenser (5), the outside of the condenser (5) is wrapped with a heat storage material (4), and the condenser (5) is respectively connected with a cold accumulation device (2) and an evaporator (7); the evaporator (7) is connected with the cold accumulation device (2) through a fan (8), and the cold accumulation device (2) is connected with the refrigerator rear air duct (1); a throttling device (3) is arranged between the condenser (5) and the cold accumulation device (2).
2. The commercial super energy-saving device for cold and condensed heat accumulation according to claim 1, characterized in that: the cold accumulation device (2) is connected with the evaporator (7) in parallel.
3. The commercial super energy-saving device for cold and condensed heat accumulation according to claim 1, characterized in that: one part of the refrigerant passing through the compressor (6) enters the cold accumulation device (2), and the other part of the refrigerant enters the evaporator (7); the refrigerants in the cold accumulation device (2) and the evaporator (7) are respectively merged into the compressor (6).
4. The commercial super energy-saving device for cold and condensed heat accumulation according to claim 1, characterized in that: the cold accumulation device (2) adopts a cuboid vertical tank, and CH is filled in the cuboid vertical tank3CH2Aqueous OH solution and NH3The mixed solution of the CL aqueous solution is inserted into the serpentine heat exchanger, and the refrigerant flows through the serpentine heat exchanger.
5. The quotient super energy saving device for cold accumulation and condensed heat accumulation as claimed in claim 4, characterized in that: and an aluminum foil is integrated outside the coiled pipe heat exchanger inside the cold accumulation device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120413397.2U CN214620257U (en) | 2021-02-25 | 2021-02-25 | Super economizer of merchant of cold-storage and condensation heat accumulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120413397.2U CN214620257U (en) | 2021-02-25 | 2021-02-25 | Super economizer of merchant of cold-storage and condensation heat accumulation |
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| Publication Number | Publication Date |
|---|---|
| CN214620257U true CN214620257U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120413397.2U Active CN214620257U (en) | 2021-02-25 | 2021-02-25 | Super economizer of merchant of cold-storage and condensation heat accumulation |
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| CN (1) | CN214620257U (en) |
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2021
- 2021-02-25 CN CN202120413397.2U patent/CN214620257U/en active Active
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