CN115388583A - Refrigerator refrigerating system, control method and cascade refrigerator refrigerating system - Google Patents
Refrigerator refrigerating system, control method and cascade refrigerator refrigerating system Download PDFInfo
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- CN115388583A CN115388583A CN202211069290.6A CN202211069290A CN115388583A CN 115388583 A CN115388583 A CN 115388583A CN 202211069290 A CN202211069290 A CN 202211069290A CN 115388583 A CN115388583 A CN 115388583A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 281
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 230000017525 heat dissipation Effects 0.000 claims abstract description 29
- 239000000498 cooling water Substances 0.000 claims abstract description 26
- 238000009833 condensation Methods 0.000 claims abstract description 11
- 230000005494 condensation Effects 0.000 claims abstract description 11
- 238000005057 refrigeration Methods 0.000 claims description 59
- 238000001514 detection method Methods 0.000 claims description 11
- 239000008400 supply water Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 24
- 239000013526 supercooled liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 235000013305 food Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 235000020965 cold beverage Nutrition 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The application relates to a freezer refrigerating system, a control method and a cascade freezer refrigerating system, wherein, the freezer refrigerating system comprises a refrigerating circuit arranged on a condensation side of a freezer, the refrigerating circuit comprises a compressor, a water-cooled condenser, an internal cooling section, a dryer, a throttler, an evaporator and a liquid collecting pipe which are sequentially connected through pipelines, wherein: the internal cooling section is arranged into a coil pipe-shaped pipeline and is arranged in the refrigerator heat-insulating layer; the water-cooled condenser adopts a double-pipe heat exchanger, one end of an inner sleeve of the double-pipe heat exchanger is connected with the compressor, and the other end of the inner sleeve of the double-pipe heat exchanger is connected with the internal cooling section; one end of an outer sleeve of the sleeve type heat exchanger is connected with a water supply pipe of a water chilling unit, the other end of the outer sleeve is connected with a water return pipe of the water chilling unit, and the water chilling unit is used for producing cooling water. Through this application solve many freezers summer and concentrate the heat dissipation and cut off the water-cooling or the condensation heat dissipation problem when the water-cooling trouble, improve freezer refrigerating system's whole energy efficiency level.
Description
Technical Field
The application relates to the technical field of refrigeration, in particular to a refrigerator refrigeration system, a control method and a cascade refrigerator refrigeration system.
Background
The commercial refrigerator refers to a refrigerating or freezing freezer which is specially sold in commercial channels such as business supermarkets, cold drink shops, frozen goods shops, hotel restaurants and the like and is used for storing ice cream, beverages, dairy products, quick-frozen foods, food materials and the like.
The self-carrying condensing unit refrigerator (self-carrying commercial refrigerator for short) widely used at present has the defects that the heat discharge amount of the condensing unit is large, the heat is not effectively utilized, the heat load of the environment air conditioner is increased, and particularly in a small convenience store, the heat load of the environment air conditioner is increased rapidly, so that a large amount of energy is wasted.
The portable air-cooled refrigerator has the advantages that the centralized heat dissipation capacity is large, but when a plurality of portable air-cooled refrigerators run simultaneously, the temperature in a region is high, the energy efficiency is low, under the condition, the heat can be transferred to the outdoor through the water cooling system to efficiently solve the problem of centralized heat dissipation, but the heat dissipation capacity of the conventional water cooling system is insufficient after a water cooling side fails or a water channel is cut off in winter, the temperature in the refrigerator cannot be guaranteed, and the use limitation is further brought.
Disclosure of Invention
The embodiment of the application provides a refrigerator refrigerating system, a control method and a cascade refrigerator refrigerating system, and aims to solve the problems of centralized heat dissipation of a plurality of refrigerators in summer and condensation heat dissipation when water cooling or water cooling faults are cut off.
In a first aspect, an embodiment of the present application provides a freezer refrigerating system, including setting up in the refrigeration circuit of the condensation side of freezer, the refrigeration circuit includes compressor, water-cooled condenser, interior cold section, desicator, flow controller, evaporimeter and the collector tube of pipe connection in proper order, wherein:
the internal cooling section is arranged into a coil pipe-shaped pipeline and is arranged in the refrigerator heat-insulating layer;
the water-cooled condenser adopts a double-pipe heat exchanger, one end of an inner sleeve of the double-pipe heat exchanger is connected with the compressor, and the other end of the inner sleeve of the double-pipe heat exchanger is connected with the internal cooling section; one end of an outer sleeve of the sleeve type heat exchanger is connected with a water supply pipe of a water chilling unit, the other end of the outer sleeve is connected with a water return pipe of the water chilling unit, and the water chilling unit is used for preparing cooling water so as to obtain the cooling water prepared by the water chilling unit for heat dissipation of a condensation side of the refrigerator.
Based on the structure, the compressor compresses the refrigerant to form high-temperature high-pressure superheated vapor, the high-temperature high-pressure superheated vapor is conveyed to the water-cooled condenser to be condensed into high-pressure supercooled liquid and radiates heat to surrounding environment media, the high-pressure supercooled liquid is conveyed to the dryer through the internal cooling section to be filtered, the high-pressure supercooled liquid is conveyed to the throttler to be throttled to form low-temperature low-pressure refrigerant wet vapor after being filtered, the low-pressure liquid enters the evaporator to be evaporated to form low-temperature low-pressure refrigerant dry saturated vapor, the low-temperature low-pressure refrigerant dry saturated vapor enters the compressor again to circulate, and a small amount of liquid refrigerant which is not evaporated in the evaporator is completely evaporated in the liquid collecting pipe. Through the interior cold section, work as when refrigerating system closed because of trouble or function setting, the accessible the interior cold section dispels the heat to the freezer, and the heat directly gives off to the indoor environment that the freezer was located, this moment the freezer changes into from carrying formula freezer.
In some embodiments, the water chilling unit comprises a water tank, and a water chilling unit compressor, a condenser, a water chilling unit restrictor, and a water chilling unit evaporator, which are sequentially connected by a pipeline, wherein cooling water is stored in the water tank, the water chilling unit evaporator is arranged in the water tank, a water distributor is connected to a water outlet of the water tank, a water collector is connected to a water inlet of the water tank, a water pump is arranged between the water distributor and the water outlet to control the output of the cooling water, and a water supply valve is arranged between the water pump and the water distributor. Specifically, the choke ware of this application, cooling water unit choke ware adopt the capillary. Specifically, the water chilling unit is started by opening the water supply valve to supply water to the double-pipe heat exchanger through the water pump.
In some embodiments, the water tank is further provided with a drain valve, and when the drain valve is opened, the water tank can drain the cooling water in the water tank through the drain valve, so that the cooling water in the water tank is prevented from freezing when the outdoor temperature is lower than 0 ℃.
In some embodiments, the heat dissipation capacity of the double pipe heat exchanger is configured to be smaller than the total heat dissipation capacity of the refrigerator refrigeration system, so as to ensure that the inner cooling section can realize the heat dissipation effect, and avoid the problem that the energy efficiency of the refrigerator refrigeration system is reduced due to the temperature return of the refrigerant. Specifically, the heat dissipation capacity of the double-pipe heat exchanger meets the heat dissipation requirement of the refrigerator refrigerating system when the water chilling unit is closed.
In some embodiments, the heat exchange area ratio of the internal cooling section to the double pipe heat exchanger is set to be 25-30%.
In some of these embodiments, the freezer refrigeration system further comprises:
a controller, said controller being pre-configured with an outdoor ambient temperature threshold t w A water supply temperature threshold t s Water supply temperature set value T s The controller is used for controlling the start and stop of the water chilling unit and the water chilling unit compressor;
an outdoor ambient temperature detector arranged on the water chilling unit and electrically connected with the controller, wherein the outdoor ambient temperature detector is used for detecting an outdoor ambient temperature value T of an outdoor space where the water chilling unit is located W And sending to the controller;
the water supply temperature detector is arranged in the water tank and electrically connected with the controller, and is used for detecting a real-time water temperature value T of cooling water in the water tank and sending the real-time water temperature value T to the controller;
indoor environment temperature detector set up in freezer outside and electric connection the controller, indoor environment temperature detector is used for detecting the indoor environment temperature value T of the interior space at freezer place n And sent to the controller.
In some of these embodiments, the supply water temperature setpoint T s Based on the indoor environment temperature value T n And the difference threshold value t is obtained by performing addition and subtraction calculation.
In some of these embodiments, the controller sets the value T based on the temperature of the water supply s And the water supply temperature threshold value t s Calculating to obtain a lower limit value T of the water supply temperature a And the upper limit value T of the temperature of the supplied water b Lower limit of supply water temperature T a Temperature value T of indoor environment being not less than n 。
Based on the structure, the heat dissipation of the refrigerator is realized by accurately configuring the heat exchange area ratio of the internal cooling section and the double-pipe heat exchanger and controlling the water supply temperature of cooling water, and meanwhile, the efficient operation of the refrigerator is kept; when the refrigerating system is started, the refrigerant can form a certain supercooling degree in the internal cooling section, the refrigerating capacity of the refrigerator is improved, when the refrigerating system is closed, the internal cooling section is utilized for heat dissipation when the fault or the environment temperature where the refrigerator is located is lower than a preset environment temperature threshold value, the normal operation of the refrigerator is guaranteed, and the problem of condensation heat dissipation when refrigeration or refrigeration fault is cut off in the prior technical scheme is solved.
In a second aspect, an embodiment of the present application provides a control method for a refrigerator refrigeration system, based on the refrigerator refrigeration system in the first aspect, including:
a detection data acquisition step of obtaining the outdoor environment temperature value T through the detection of the outdoor environment temperature detector w And sending to the controller;
a step of controlling the start and the stop of the water chilling unit, which is realized by the controller according to the outdoor environment temperature threshold t w Judging whether to start the water chilling unit:
when T is w ＞t w When the water chilling unit is started, the water chilling unit is started;
when T is w ≤t w And when the water chilling unit is closed, the water chilling unit is closed.
In some embodiments, the chiller start-stop control step further comprises:
a water supply detection data acquisition step, wherein the controller acquires the water supply detection data according to the indoor environment temperature value T n And calculating the difference threshold T to obtain the set value T of the water supply temperature s Then combining the water supply temperature threshold value t s Calculating the lower limit value T of the water supply temperature a And the upper limit value T of the temperature of the supplied water b ；
A step of controlling the start and stop of a compressor of the water chilling unit, wherein the controller controls the start and stop of the compressor of the water chilling unit according to the real-time water temperature value T and the water supply temperature lower limit value T a Upper limit value T of water supply temperature b And (4) judging:
when the real-time water temperature value T is less than or equal to T a When the water chilling unit is started, the controller controls the water chilling unit compressor to be closed;
when the real-time water temperature value T is more than T b And when the water chilling unit is started, the controller controls the water chilling unit compressor to start.
Based on the steps, the outdoor environment temperature value T is used for the outdoor environment temperature value T w The method realizes the start-stop control of the water chilling unit to prevent the misoperation of the water chilling unit under the non-use working condition, realizes the start-stop control of the compressor of the water chilling unit based on the real-time water temperature value T, adopts the dual-threshold control to stabilize the water supply temperature at the lower limit value T a And an upper limit value T b The double-pipe heat exchanger has the advantages that the radiating working condition of the double-pipe heat exchanger is stable, the problem that the compressor of the existing water chilling unit is continuously and frequently started and stopped is solved, the overall energy efficiency level of the refrigerator refrigerating system is favorably improved, and the running cost of the refrigerator is reduced.
In a third aspect, an embodiment of the present application provides a cascade refrigerator refrigeration system, including a plurality of refrigerator refrigeration systems as described in the first aspect, where a double pipe heat exchanger of each refrigerator refrigeration system is connected in parallel to the water separator and the water collector, and is controlled by a control method of the refrigerator refrigeration system as described in the second aspect.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic view of a freezer refrigeration system according to an embodiment of the present application;
fig. 2 is a schematic diagram of the operating principle of a freezer refrigeration system according to an embodiment of the present application;
fig. 3 is a flow chart of a method of controlling a freezer refrigeration system according to an embodiment of the present application;
fig. 4 is a flow chart of a freezer refrigeration system control method according to a preferred embodiment of the present application.
In the figure:
11. a compressor; 12. a water-cooled condenser; 13. an internal cooling section; 14. a dryer;
15. a restrictor; 16. an evaporator; 17. a liquid collecting pipe;
21. a water tank; 22. a chiller compressor; 23. a condenser; 24. a water chilling unit restrictor;
25. a chiller evaporator; 26. an outdoor ambient temperature detector; 27. a supply water temperature detector;
28. an indoor ambient temperature detector; 29. a water drain valve;
211. a water pump; 212. a water supply valve; 213. a water supply pipe; 214. a water return pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The first embodiment is as follows:
fig. 1 is a schematic diagram of a refrigeration system of a refrigerator in an embodiment of the present application, and as shown in fig. 1 by reference, the embodiment of the present application provides a refrigeration system of a refrigerator, which includes a refrigeration loop disposed on a condensation side of the refrigerator, where the refrigeration loop includes a compressor 11, a water-cooled condenser 12, an internal cooling section 13, a dryer 14, a restrictor 15, an evaporator 16, and a liquid collecting pipe 17, which are sequentially connected by a pipeline, and optionally, the evaporator 16 employs a coil evaporator. The inner cooling section 13 is a coiled pipeline, and when the inner cooling section 13 is applied, the inner cooling section 13 is arranged in the refrigerator heat-insulating layer; the water-cooled condenser 12 adopts a double-pipe heat exchanger, one end of an inner sleeve of the double-pipe heat exchanger is connected with the compressor 11, and the other end of the inner sleeve is connected with the inner cooling section 13; one end of an outer sleeve of the sleeve type heat exchanger is connected with a water supply pipe of a water chilling unit, the other end of the outer sleeve is connected with a water return pipe of the water chilling unit, and the water chilling unit is used for preparing cooling water so as to obtain the cooling water prepared by the water chilling unit and radiate heat on the condensation side of the refrigerator.
Referring to fig. 1, the water chilling unit includes a water tank 21, a water chilling unit compressor 22, a condenser 23, a water chilling unit restrictor 24, and a water chilling unit evaporator 25, which are sequentially connected by a pipeline, wherein cooling water is stored in the water tank 21, the water chilling unit evaporator 25 is disposed inside the water tank 21, a water outlet of the water tank 21 is connected to a water separator, a water inlet is connected to a water collector through a return pipe 241, a water pump 211 is disposed between the water separator and the water outlet to control the output of the cooling water, a water supply valve 212 is disposed between the water pump 211 and the water separator, and the water supply valve 212 is connected to the water separator through a water supply pipe 213. The restrictor 15 and the water chiller restrictor 24 of the present application employ capillary tubes. Through the water segregator and the water collector, the water chilling unit provides cooling water for a plurality of refrigerator refrigerating systems.
Specifically, in the embodiment of the present application, the water supply valve 212 is opened to start the water chiller to supply water to the double pipe heat exchanger through the water pump 211 and the water supply pipe 213, fig. 2 shows the flow direction of the cooling water and the refrigerant when the water supply valve 212 of the water chiller is opened, and optionally, the water supply valve 212 is a manual valve or an electric valve, and the electric valve may be electrically connected to a controller described below to implement intelligent control.
It should be noted that, under the standard working condition, the heat dissipation capacity of the double pipe heat exchanger is configured to be smaller than the total heat dissipation capacity of the freezer refrigeration system, so as to ensure that the inner cooling section 13 can realize the heat dissipation function thereof, and avoid the problem that the energy efficiency of the freezer refrigeration system is reduced due to the temperature return of the refrigerant. For example and not limitation, the standard operating condition of the embodiment of the present application is set to 38 ℃, and in the standard operating condition, technicians may perform adaptive modification according to scene requirements in practical application. Specifically, the heat dissipation capacity of the double-pipe heat exchanger meets the heat dissipation requirement of a refrigerator refrigeration system when the water chilling unit is closed. If the water chilling unit is closed when the specific working condition corresponding to the embodiment of the application is the outdoor environment temperature of 22 ℃, the heat dissipation capacity of the double-pipe heat exchanger meets the heat dissipation requirement under the specific working condition. Optionally, the heat exchange area ratio of the inner cooling section 13 to the double-pipe heat exchanger is set to be 25% -30%.
As shown in fig. 1, the water tank 21 is further provided with a drain valve 29, and when the drain valve 29 is opened, the water tank 21 can drain the cooling water in the water tank 21 through the drain valve 29, so as to prevent the cooling water in the water tank 21 from freezing when the outdoor temperature is lower than 0 ℃.
In order to further realize the intelligent control to freezer refrigerating system, the freezer refrigerating system of this application embodiment still includes:
a controller, the controller being pre-configured with an outdoor ambient temperature threshold t w Water supply temperature threshold t s Temperature of water supplySet value T s And a difference threshold t, wherein the controller is used for controlling the start and stop of the water chilling unit and the water chilling unit compressor;
an outdoor environment temperature detector 26 arranged on the water chilling unit and electrically connected with the controller, wherein the outdoor environment temperature detector 26 is used for detecting an outdoor environment temperature value T of an outdoor space where the water chilling unit is located W And sending to the controller;
the water supply temperature detector 27 is arranged inside the water tank 21 and electrically connected with the controller, and the water supply temperature detector 27 is used for detecting the real-time water temperature value T of the cooling water inside the water tank 21 and sending the real-time water temperature value T to the controller;
the indoor environment temperature detector 28 is arranged outside the refrigerator and electrically connected with the controller, and the indoor environment temperature detector 28 is used for detecting an environment temperature value of an indoor space where the refrigerator is located and sending the environment temperature value to the controller;
wherein the water supply temperature is set value T s Based on indoor environment temperature value T n And calculating a difference threshold T, T s ＝T n + t; the controller is based on the set value T of the water supply temperature s And a water supply temperature threshold t s Calculating to obtain a lower limit value T of the water supply temperature a And upper limit value T of water supply temperature b ，T a ＝T s -t s ，T b ＝T s +t s (ii) a Lower limit value T of simultaneous water supply temperature a Temperature value T of indoor environment being not less than n 。
Based on the structure, the compressor 11 compresses the refrigerant to become high-temperature high-pressure superheated vapor, the high-temperature high-pressure superheated vapor is transmitted to the water-cooled condenser 12 to be condensed into high-pressure supercooled liquid and radiate heat to the surrounding medium, the high-pressure supercooled liquid is transmitted to the dryer 14 through the inner cooling section 13 to be filtered, the high-pressure supercooled liquid is transmitted to the throttler 15 after being filtered to be throttled to become low-temperature low-pressure refrigerant wet vapor, the low-pressure liquid enters the evaporator 16 to be evaporated to become low-temperature low-pressure refrigerant dry saturated vapor and then enters the compressor 11 again to be circulated, and a small amount of liquid refrigerant which cannot be evaporated in the evaporator 16 is completely evaporated in the liquid collecting pipe 17. Through interior cold section 13, when refrigerating system closed because of trouble or function setting, cold section 13 dispels the heat to the freezer in the accessible, and the heat directly gives off to the indoor environment that the freezer was located, and the freezer changes into from carrying formula freezer this moment.
The embodiment of the application also realizes the heat dissipation of the refrigerator through the accurately configured heat exchange area ratio of the inner cooling section 13 and the double-pipe heat exchanger and the control of the water supply temperature of cooling water, and simultaneously keeps the efficient operation of the refrigerator; when the refrigerating system is closed, when the ambient temperature of the refrigerator or the fault is lower than a preset ambient temperature threshold (such as 22 ℃), the internal cooling section 13 is used for heat dissipation, so that the normal operation of the refrigerator is guaranteed, and the problem of condensation heat dissipation when refrigeration or refrigeration faults are cut off in the prior technical scheme is solved.
The second embodiment is as follows:
at present, the heat exchange efficiency of a refrigeration system of a refrigerator is usually 0.9, that is, assuming that an indoor environment temperature value is 25 ℃ and a temperature of a refrigerant is 40 ℃, based on the premise, if a real-time water temperature value T is 20 ℃, a temperature after heat exchange of the refrigerant output after heat exchange in the double pipe heat exchanger of the specific embodiment is 22 ℃, and the temperature after heat exchange is less than the indoor environment temperature value, therefore, if the real-time water temperature value T is too low, a situation that part of the refrigerant is vaporized after the refrigerant enters the inner cooling section 13 exists, further increasing the flow resistance of the refrigerant in a pipeline, reducing the flow of the refrigerant after entering the restrictor 15, and deteriorating the refrigeration effect of the refrigerator.
Therefore, based on the refrigerator refrigeration system according to the first embodiment, the embodiment of the present application further provides a control method for the refrigerator refrigeration system, so as to solve the above technical problem. Fig. 3 is a flow chart of a freezer refrigeration system control method according to an embodiment of the present application, and referring to fig. 3, the flow chart includes the following steps:
a detection data acquisition step S1 of obtaining an outdoor environment temperature value T through detection of the outdoor environment temperature detector 26 w And sending to the controller;
a step S2 of controlling the start and stop of the water chilling unit is realized by a controller according to an outdoor environment temperature threshold t w Whether the water chilling unit is started or not is judged, specifically,
when T is w ＞t w When the water is cooled, the water chilling unit is started;
when T is w ≤t w When the temperature of the water is higher than the set temperature,the chiller is shut down.
Wherein, after starting the water chilling unit, the water chilling unit start-stop control step S2 further comprises:
a water supply detection data acquisition step S201, a controller according to the indoor environment temperature value T n And calculating a difference threshold T to obtain a set value T of the temperature of the supplied water s Then, combining with the water supply temperature threshold t s Calculating the lower limit value T of the water supply temperature a And upper limit value T of water supply temperature b ；
A step S202 of controlling the closing of a compressor of the water chilling unit, wherein a controller controls the closing of the compressor according to a real-time water temperature value T and a water supply temperature lower limit value T a Upper limit value T of water supply temperature b And (4) judging:
when the real-time water temperature value T is less than or equal to T a When the water chilling unit is started, the controller controls the water chilling unit compressor 22 to be turned off;
when the real-time water temperature value T is more than T b At this time, the controller controls the chiller compressor 22 to start.
The embodiments of the present application are described and illustrated below by way of preferred embodiments.
Fig. 4 is a flow chart of a control method of a refrigeration system of a refrigerator according to a preferred embodiment of the present application, referring to fig. 4, assuming an outdoor ambient temperature threshold t w =22 ℃, difference threshold t =2 ℃, water supply temperature threshold t s 2, the indoor ambient temperature value T detected by the indoor ambient temperature detector 28 n =25 ℃, the controller calculates the set value T of the supply water temperature of the cooling water based on the calculation formula of the above embodiment s ＝T n + T =27 ℃, and obtaining the lower limit value T of the water supply temperature a =25 ℃, upper limit value T of water supply temperature b ＝29℃。
As shown in FIG. 4, after the system is powered on, the system is first powered on according to the outdoor ambient temperature threshold t w Judging whether to start the water chilling unit, and when the outdoor environment temperature value T of the water chilling unit is w ＞t w The controller turns on the chiller, the water supply valve 212, and the water pump 211 of the refrigeration system, whereas the controller turns off the chiller, including but not limited to the chiller compressor 22, the water supply valve 212, the fan of the condenser 23, and the power source of the water pump 211.
After the water chilling unit is started, the controller judges and confirms whether the water supply temperature lower limit value T is available a Temperature value T of indoor environment being not less than n If yes, entering the step of controlling the start and stop of the water chilling unit, otherwise, setting the water supply temperature to be T s Update set to T s ＝T s +1, further adjusting the lower limit value T of the water supply temperature a And the upper limit value T of the temperature of the supplied water b The refrigerant forms a certain supercooling degree in the internal cooling section, which is beneficial to improving the refrigerating capacity of the system;
in the step of controlling the start and the stop of the water chilling unit, the controller controls the water chilling unit according to the real-time water temperature value T and the lower limit value T of the water supply temperature a Upper limit value T of water supply temperature b The judgment is made, in the preferred embodiment, when the real-time water temperature value T > the upper limit value T of the water supply temperature b (T b If not, the lower limit value T of the water supply temperature is further judged a When the real-time water temperature value T is less than or equal to the water supply temperature lower limit value T a (T a And (4) =25 ℃), turning off the refrigerating system of the cold water unit, namely turning off the compressor 22 of the cold water unit, and otherwise, returning to the previous step.
Based on the above control process, the real-time water temperature value of the preferred embodiment is maintained at 25 ℃ < real-time water temperature value < 29 ℃, and if the real-time water temperature value is 26 ℃, the temperature of the refrigerant after heat exchange is 27.4 ℃ under the same condition, that is, the temperature value after heat exchange is greater than the indoor environment temperature value T n The vaporization of the refrigerant in the internal cooling section 13 is effectively avoided, and the refrigerant can be ensured to be continuously condensed when entering the internal cooling section 13.
Based on the steps, the outdoor environment temperature value T is used for the outdoor environment temperature value T w The control method has the advantages that the control of starting and stopping the water chilling unit is achieved, misoperation of the water chilling unit under the non-use working condition is prevented, the control of starting and stopping the compressor 22 of the water chilling unit is achieved based on the real-time water temperature value T, the temperature of a refrigerant at the outlet of the water-cooling heat exchanger is higher than the ambient temperature, the forward condensation effect of the inner cooling section is achieved through control, the cooling effect of a refrigerating system is improved, the control method adopts double-threshold control, the water supply temperature is stabilized between the upper limit value and the lower limit value, and the sleeve type heat exchange is guaranteedThe heat dissipation operating mode of ware is stable, has solved the problem that current cooling water set compressor constantly frequently opened and stops, is favorable to improving freezer refrigerating system's whole efficiency level, reduces freezer running cost.
It should be noted that the steps illustrated in the above-described flow diagrams or in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flow diagrams, in some cases, the steps illustrated or described may be performed in an order different than here.
The third concrete embodiment:
the freezer refrigeration system of the embodiment of the application described in conjunction with fig. 1 and fig. 2, the embodiment of the application further provides a cascade freezer refrigeration system, which comprises a plurality of freezer refrigeration systems of the first embodiment, a sleeve-type heat exchanger of each freezer refrigeration system is connected in parallel to a water separator and a water collector, as shown in fig. 1, the first freezer refrigeration system is arranged in a freezer 1, the second freezer refrigeration system is arranged in a freezer 2, the freezer refrigeration systems are connected in parallel in sequence, and the freezer refrigeration system control method of the second embodiment is adopted for control.
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 embodiments and the corresponding parameter configurations only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a freezer refrigerating system, is including setting up in the refrigeration circuit of the condensation side of freezer, its characterized in that, refrigeration circuit is including compressor, water-cooled condenser, interior cold section, desicator, flow controller, evaporimeter and the collector tube of pipe connection in proper order, wherein:
the internal cooling section is arranged into a coil pipe-shaped pipeline and is arranged in the refrigerator heat-insulating layer;
the water-cooled condenser adopts a double-pipe heat exchanger, one end of an inner sleeve of the double-pipe heat exchanger is connected with the compressor, and the other end of the inner sleeve of the double-pipe heat exchanger is connected with the internal cooling section; one end of an outer sleeve of the double-pipe heat exchanger is connected with a water supply pipe of a water chilling unit, the other end of the outer sleeve is connected with a water return pipe of the water chilling unit, and the water chilling unit is used for producing cooling water.
2. A refrigerator refrigerating system as claimed in claim 1, wherein the chiller comprises a water tank, and a chiller compressor, a condenser, a chiller restrictor and a chiller evaporator connected in sequence by pipes, the water tank stores cooling water, the chiller evaporator is arranged inside the water tank, a water outlet of the water tank is connected with a water separator, a water inlet is connected with a water collector, a water pump is arranged between the water separator and the water outlet to control the output of the cooling water, and a water supply valve is arranged between the water pump and the water separator.
3. The refrigerator refrigeration system of claim 2, wherein the heat dissipation capacity of the double pipe heat exchanger is configured to be less than the total heat dissipation capacity of the refrigerator refrigeration system.
4. A refrigerator refrigeration system as claimed in claim 3, wherein the heat exchange area ratio of said inner cooling section to said double pipe heat exchanger is set to 25% -30%.
5. The freezer refrigeration system of claim 4, further comprising:
a controller, said controller being pre-configured with an outdoor ambient temperature threshold t w A water supply temperature threshold t s Water supply temperature set value T s The controller is used for controlling the start and stop of the water chilling unit and the water chilling unit compressor;
an outdoor ambient temperature detector arranged on the water chilling unit and electrically connected with the controller, wherein the outdoor ambient temperature detector is used for detecting an outdoor ambient temperature value T of an outdoor space where the water chilling unit is located W And sending to the controller;
the water supply temperature detector is arranged in the water tank and electrically connected with the controller, and is used for detecting a real-time water temperature value T of cooling water in the water tank and sending the real-time water temperature value T to the controller;
indoor environment temperature detector set up in freezer outside and electric connection the controller, indoor environment temperature detector is used for detecting the indoor environment temperature value T of the interior space at freezer place n And sent to the controller.
6. A refrigerator refrigeration system as claimed in claim 5, wherein said water supply temperature setpoint T s Based on the indoor environment temperature value T n And calculating the difference threshold t.
7. A refrigerator refrigeration system as set forth in claim 6, wherein said controller is based on a water supply temperature setpoint T s And the water supply temperature threshold value t s Calculating to obtain a lower limit value T of the water supply temperature a And upper limit value T of water supply temperature b Lower limit of supply water temperature T a Temperature value T of indoor environment being not less than n 。
8. A refrigerator refrigeration system control method based on the refrigerator refrigeration system as claimed in any one of claims 1 to 7, characterized by comprising:
a detection data acquisition step of obtaining the outdoor environment temperature value T through the detection of the outdoor environment temperature detector w And sent to theA controller;
a step of controlling the start and the stop of the water chilling unit, which is realized by the controller according to the outdoor environment temperature threshold t w Judging whether to start the water chilling unit:
when T is w ＞t w When the water chilling unit is started, the water chilling unit is started;
when T is w ≤t w And when the water chilling unit is closed, the water chilling unit is closed.
9. The freezer refrigeration system control method of claim 8, wherein the chiller start stop control step further comprises:
a water supply detection data acquisition step, wherein the controller acquires the water supply detection data according to the indoor environment temperature value T n And calculating the difference threshold value T to obtain the set value T of the water supply temperature s Then, combining the water supply temperature threshold value t s Calculating the lower limit value T of the water supply temperature a And upper limit value T of water supply temperature b ；
A step of controlling the start and stop of a compressor of the water chilling unit, wherein the controller controls the start and stop of the compressor of the water chilling unit according to the real-time water temperature value T and the water supply temperature lower limit value T a Upper limit value T of water supply temperature b And (4) judging:
when the real-time water temperature value T is less than or equal to T a When the water chilling unit is started, the controller controls the water chilling unit compressor to be closed;
when the real-time water temperature value T is more than T b And when the water chilling unit is started, the controller controls the water chilling unit compressor to start.
10. A cascaded refrigerator refrigeration system comprising a plurality of refrigerator refrigeration systems of any one of claims 1 to 7, wherein a double pipe heat exchanger of each of the refrigerator refrigeration systems is connected in parallel to the water separator and the water collector and is controlled by a refrigerator refrigeration system control method of claim 8 or 9.
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| CN202211069290.6A CN115388583A (en) | 2022-08-31 | 2022-08-31 | Refrigerator refrigerating system, control method and cascade refrigerator refrigerating system |
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