CN110779254A - Showcase control method and related system - Google Patents
Showcase control method and related system Download PDFInfo
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- CN110779254A CN110779254A CN201910949299.8A CN201910949299A CN110779254A CN 110779254 A CN110779254 A CN 110779254A CN 201910949299 A CN201910949299 A CN 201910949299A CN 110779254 A CN110779254 A CN 110779254A
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- heat exchanger
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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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- A47F3/00—Show cases or show cabinets
- A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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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
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
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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
- F25D29/005—Mounting of control 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
- F25D2500/00—Problems to be solved
- F25D2500/06—Stock management
Abstract
The application relates to a display cabinet control method and a related system, and belongs to the technical field of refrigeration. The application includes: step S11, sequentially performing refrigeration start-stop control on the plurality of showcases according to the preset number sequence of the plurality of showcases and the lower limit target temperature of each of the plurality of showcases; step S12, obtaining the refrigeration temperature of each display cabinet, and comparing the refrigeration temperature of each display cabinet with the corresponding upper limit target temperature; in step S13, the cooling operation of the showcase whose cooling temperature is closest to the upper limit target temperature is turned on based on the temperature comparison result of each showcase, and when the cooling temperature reaches the lower limit target temperature, the turned-on cooling operation is turned off, and the process proceeds to step S12. Through this application, help realizing the accurate control to each show case refrigeration temperature, and then help promoting the efficiency.
Description
Technical Field
The application belongs to the technical field of refrigeration, and particularly relates to a display cabinet control method and a related system.
Background
In the past, a plurality of low-temperature showcases are often installed in places such as convenience stores and supermarkets, and a condenser unit installed separately outdoors supplies a refrigerant to an evaporator of each low-temperature showcase to cool or refrigerate foods and also to display and sell the foods.
The condensing unit adopts a mode of dragging more, in the correlation technique, open cooling control simultaneously to a plurality of show cases, nevertheless because of the kind and the quantity difference of display commodity in the different show cases, lead to the ability difference of staying cold volume, under this actual conditions, open cooling control simultaneously to a plurality of show cases, to the show case that has the commodity of staying cold volume ability reinforce, to its simultaneous control that goes on, may be unnecessary, lead to the accurate nature of temperature control not high, and then lead to appearing the extravagant problem of energy consumption.
Disclosure of Invention
To overcome at least some of the problems of the related art, the present application provides a method and a related system for controlling a display cabinet, which are helpful for achieving precise control of the refrigeration temperature of each display cabinet, and further, are helpful for improving energy efficiency.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect,
the application provides a showcase control method, which comprises the following steps:
step S11, sequentially performing refrigeration start-stop control on a plurality of display cabinets according to preset numbering sequences of the display cabinets and the lower limit target temperatures of the display cabinets;
step S12 of acquiring the cooling temperature of each showcase, and comparing the cooling temperature of each showcase with the upper limit target temperature corresponding thereto;
step S13 is to turn on the cooling operation of the showcase whose cooling temperature is closest to the upper limit target temperature, and to turn off the turned-on cooling operation when the cooling temperature reaches the lower limit target temperature, based on the temperature comparison result of each showcase, and the process proceeds to step S12.
Further, the step S11 includes:
s111, according to the preset serial number sequence, starting refrigeration of the display cabinet corresponding to the first serial number;
s112, when the temperature reaches the lower limit target temperature, closing the opened refrigeration, and opening the refrigeration of the display cabinet corresponding to the next sequence number;
and S113, repeatedly executing 112 until the refrigeration start-stop control of the last numbered showcase is completed.
In a second aspect of the present invention,
the present application provides a low temperature display system comprising:
a plurality of showcases, an
A condenser unit, wherein the condenser unit controls a plurality of the showcases by using any one of the methods described above.
Further, the unit capacity of the condensing unit is matched with the display cabinet with the maximum refrigerating capacity.
In a third aspect,
the application provides a low temperature display and air conditioner integrated system, includes:
a condenser assembly, wherein the condenser assembly is capable of performing the steps of the method of any one of the above; and
an air conditioner external unit;
wherein the content of the first and second substances,
the condensing unit includes: the first outdoor unit heat exchanger is a condenser;
the outer unit of air conditioner includes: a second outdoor unit heat exchanger;
the second external machine heat exchanger and the first external machine heat exchanger are arranged in parallel, so that when the second external machine heat exchanger works as an evaporator, the second external machine heat exchanger can prevent the second external machine heat exchanger from frosting by utilizing heat emitted by the first external machine heat exchanger.
Further, the system further comprises:
the showcase and the condensing unit form a first refrigerant circulation loop, wherein the first outer unit heat exchanger is formed in the first refrigerant circulation loop;
the air conditioner indoor unit and the air conditioner outdoor unit form a second refrigerant circulation loop, wherein the second outdoor heat exchanger is formed in the second refrigerant circulation loop; and
the double-pipe heat exchanger is provided with a first refrigerant channel and a second refrigerant channel, the first refrigerant channel is connected in series with the first refrigerant circulation loop, and the second refrigerant channel is connected in series with the second refrigerant circulation loop.
Further, the system further comprises:
an outer unit fan configured to: when the second outdoor unit heat exchanger works as an evaporator, the fan guides heat generated by the first outdoor unit heat exchanger to the second outdoor unit heat exchanger.
Furthermore, the first refrigerant channel is connected in series with a flow path between the first outer unit heat exchanger and the display cabinet; and
the second refrigerant channel is connected in series with a flow path at the refrigerant outflow side of the air conditioner indoor unit when the air conditioner indoor unit is refrigerating.
Further, the condensing unit includes still that: a first compressor formed in the first refrigerant circulation circuit.
Further, the first refrigerant circulation circuit is provided with: a first throttling element disposed on a flow path between the first outer unit heat exchanger and the showcase.
Further, the air-conditioning external unit further includes: and the second compressor and the four-way valve are formed in the second refrigerant circulating loop.
Further, the second refrigerant circulation circuit is provided with: and the second throttling element is arranged on a flow path between the second external machine heat exchanger and the internal machine of the air conditioner.
Further, the display cabinet is provided with a plurality of display cabinets.
Further, the unit capacity of the condensing unit is matched with the display cabinet with the maximum refrigerating capacity.
This application adopts above technical scheme, possesses following beneficial effect at least:
according to the method, the heating start-stop control is performed on the plurality of display cabinets in sequence according to the preset serial number sequence, then the display cabinets with the refrigerating temperatures closest to the target temperature are independently refrigerated to start-stop control according to the refrigerating temperatures of the obtained display cabinets, the refrigerating temperatures of the display cabinets with the refrigerating temperatures closest to the target temperature are controlled to be within the control range, and the energy efficiency is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a showcase control method according to an embodiment of the present application;
fig. 2 is a schematic flow chart illustrating sequential refrigeration start-stop control for a plurality of display cases according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a cryogenic display system 3 according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an integrated low temperature display and air conditioning system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic flow chart of a showcase control method according to an embodiment of the present application, and as shown in fig. 1, the showcase control method includes the following steps:
and step S11, sequentially performing cooling start-stop control on the plurality of showcases according to the preset number sequence of the plurality of showcases and the lower limit target temperature of each of the plurality of showcases.
Specifically, each showcase is provided with a corresponding number, and the showcases can be arranged according to the model size of the showcase, for example, there are three showcases with different model sizes, and the showcases may be: the showcase placement number 1 with the smallest model, the showcase placement number 2 with the medium model, and the showcase placement number 3 with the largest model. The showcase number may be set in accordance with a lower limit target temperature of the target temperature control range of the showcase, and for example, three showcases having different target temperature control ranges may be: the showcase arrangement number 1 whose lower limit target temperature is the smallest, the showcase arrangement number 2 whose lower limit target temperature is medium, and the showcase arrangement number 3 whose lower limit target temperature is the largest. The preset numbering sequence may be 1, 2 and 3 from small to large, or 3, 2 and 1 from large to small, or may be a disordered sequence formed according to the refrigerating capacity of the displayed commodities in each showcase.
In a specific application, the condensing unit adopts a one-driving-multiple mode, and all the display cabinets are connected in parallel, so that the independent refrigeration start-stop control can be performed on all the display cabinets, and the following description is provided by a specific embodiment.
Fig. 2 is a schematic flow chart of the sequential refrigeration start-stop control for a plurality of display cases according to an embodiment of the present application, and as shown in fig. 2, the method includes the following steps:
s111, according to the preset serial number sequence, starting refrigeration of the display cabinet corresponding to the first serial number;
s112, when the temperature reaches the lower limit target temperature, closing the opened refrigeration, and opening the refrigeration of the display cabinet corresponding to the next sequence number;
and S113, repeatedly executing 112 until the refrigeration start-stop control of the last numbered showcase is completed.
Specifically, the following configuration numbers are given for three showcases having different sizes: the showcase arrangement number 1 with the smallest model, the showcase arrangement number 2 with the medium model, and the showcase arrangement number 3 with the largest model can be 1, 2, 3 in the preset number sequence from small to large. The condensing unit is controlled as follows: firstly, the refrigeration of the showcase corresponding to the first number 1 is started, whether the refrigeration temperature of the showcase of the number 1 reaches the lower limit target temperature or not is judged in the refrigeration process, and when the refrigeration temperature reaches the lower limit target temperature, the refrigeration started by the showcase of the number 1 is closed; then, at the same time, the refrigeration of the showcase corresponding to the next number 2 is started, in the refrigeration process, whether the refrigeration temperature of the showcase of the number 2 reaches the lower limit target temperature or not is judged, and when the lower limit target temperature is reached, the refrigeration started by the showcase of the number 2 is closed; and then, the refrigeration of the showcase corresponding to the next number 3 is started, whether the refrigeration temperature of the showcase with the number 3 reaches the lower limit target temperature or not is judged in the refrigeration process, and the refrigeration started by the showcase with the number 3 is closed when the refrigeration temperature reaches the lower limit target temperature, so that the refrigeration start-stop control of the three showcases is realized in sequence according to the number sequence.
In a specific application, taking the target temperature control range of 2-8 ℃ as an example, when the refrigeration temperature of the display cabinet reaches the lower limit target temperature of 2 ℃, the refrigeration which is turned on is turned off, the temperature of the display cabinet rises to 8 ℃, a slow time process is needed, and in the time process, the condenser unit with the adaptive unit capacity has enough capacity to reduce the refrigeration temperature of other display cabinets to the lower limit target temperature.
Step S12 is to acquire the cooling temperature of each showcase, and compare the cooling temperature of each showcase with the corresponding upper limit target temperature.
Specifically, after the refrigeration start-stop control is performed on the plurality of showcases in sequence according to the number sequence, the refrigeration temperatures of the plurality of showcases are all within the control range. Since the cooling of each showcase is turned off, the cooling temperature of each showcase gradually rises, and the rate of rise in the cooling temperature of each showcase may vary depending on the kind and/or number of commodities displayed in each showcase.
Also taking the three different sized display cases mentioned above as an example, each mechanical display case can have the same temperature control range, for example, 2-8 ℃; the temperature control range of the showcase No. 1 is 2-10 ℃, the temperature control range of the showcase No. 2 is 2-8 ℃, and the temperature control range of the showcase No. 3 is 0-8 ℃. After the refrigeration start-stop control is performed on the plurality of display cabinets in sequence according to the numbering sequence, the refrigeration temperature of each display cabinet is compared with the corresponding upper limit target temperature, so that corresponding temperature comparison results can be obtained, such as: the refrigeration temperature of the numbered 1 display cabinet is 5 ℃, and the difference of 10 ℃ from the corresponding upper limit target temperature is 5 ℃; the refrigeration temperature of the number 2 display cabinet is 5 ℃, and the difference between the refrigeration temperature and the corresponding upper limit target temperature is 8 ℃ and 3 ℃; the refrigeration temperature for showcase No. 3 was 2 ℃ which was 6 ℃ different from the corresponding upper limit target temperature of 8 ℃.
Step S13 is to turn on the cooling operation of the showcase whose cooling temperature is closest to the upper limit target temperature, and to turn off the turned-on cooling operation when the cooling temperature reaches the lower limit target temperature, based on the temperature comparison result of each showcase, and the process proceeds to step S12.
Specifically, the showcase with the refrigerating temperature closest to the upper limit target temperature shows that the refrigerating capacity of the displayed commodities of the showcase is not strong, or the showcase is closed for the longest refrigerating time, so that the temperature of the showcase is firstly beyond the upper limit target temperature of the temperature control range, and therefore the showcase with the refrigerating temperature closest to the target temperature is subjected to independent refrigerating start-stop control. Taking the above-mentioned related embodiment as an example-the refrigeration temperature of the showcase No. 1 is 5 ℃, which is 5 ℃ lower than the corresponding upper limit target temperature by 10 ℃; the refrigeration temperature of the number 2 display cabinet is 5 ℃, and the difference between the refrigeration temperature and the corresponding upper limit target temperature is 8 ℃ and 3 ℃; the refrigeration temperature for showcase No. 3 was 2 ℃ which was 6 ℃ different from the corresponding upper limit target temperature of 8 ℃. It can be determined that the showcase No. 2 is the showcase whose cooling temperature is closest to the upper limit target temperature, and the cooling of the showcase No. 2 is turned on so that the cooling temperature of the showcase No. 2 is again lowered to the corresponding lower limit target temperature of 2 ℃.
Thereafter, the steps S12 and S13 are repeatedly executed in a loop, and the individual refrigeration start/stop control is performed on the showcase whose refrigeration temperature is closest to the target temperature, which contributes to achieving accurate control of the refrigeration temperature of each showcase within the control range, and further contributes to improving energy efficiency.
Fig. 3 is a schematic structural diagram of a low temperature display system 3 according to an embodiment of the present application, and as shown in fig. 3, the low temperature display system 3 includes:
a plurality of showcases 31, an
A condenser unit 32, wherein the condenser unit 32 controls the plurality of showcases 31 by any one of the methods described above.
With respect to the cryogenic display system 3 of the related embodiment described above, the specific manner in which the condensing unit 32 operates has been described in detail in the related embodiment described above, and will not be described in detail herein.
In one embodiment, the capacity of the condensing unit 32 is matched to the display cabinet 31 having the largest refrigerating capacity.
Specifically, the condensing unit 32 adopts a mode of dragging a plurality of display cabinets 31, in the related art, for the model selection of the condensing unit 32, the plurality of display cabinets 31 are simultaneously opened for cooling, and the temperature is reduced to the minimum temperature required by a user, in the model selection mode, the unit capacity of the condensing unit 32 is matched with the sum of the refrigerating capacities of all the display cabinets 31, and the problem that when the condensing unit 32 only controls one display cabinet 31, the unit capacity far exceeds the refrigerating requirement of a single display cabinet 31, the problem that the model selection of the condensing unit 32 is too large exists, when the single display cabinet 31 is refrigerated, the refrigerating is too fast, the condensing unit 32 is frequently started and stopped, and the condensing unit 32 cannot normally return oil, and the compressor is damaged is caused.
Through the scheme of the embodiment, the unit capacity of the condensing unit 32 is matched with the display cabinet 31 with the largest refrigerating capacity, and by adopting the related control method of the display cabinet 31, the unit capacity is not too large in the process of controlling a single display cabinet 31 by the condensing unit 32, the starting and stopping frequency of the condensing unit 32 can be effectively reduced, and the operation safety of the condensing unit 32 is improved.
Fig. 4 is a schematic structural diagram of a low-temperature display and air-conditioning integrated system according to an embodiment of the present application, and as shown in fig. 4, the low-temperature display and air-conditioning integrated system 4 includes:
a condenser assembly 32, wherein the condenser assembly 32 is capable of performing the steps of the method according to any one of the preceding claims; and
an air conditioner external unit 41;
wherein the content of the first and second substances,
the condensing unit 32 includes: a first outdoor unit heat exchanger 301, wherein the first outdoor unit heat exchanger 301 is a condenser;
the air-conditioning external unit 41 includes: a second outdoor heat exchanger 401;
the second outdoor unit heat exchanger 401 and the first outdoor unit heat exchanger 301 are arranged in parallel, so that when the second outdoor unit heat exchanger 401 works as an evaporator, the second outdoor unit heat exchanger 401 can utilize heat emitted by the first outdoor unit heat exchanger 301 to prevent the second outdoor unit heat exchanger 401 from frosting.
Specifically, the condensing unit 32 and the external air-conditioning unit 41 are designed as a part of the external unit of the integrated cryogenic display and air-conditioning system, and the operation of the condensing unit 32 is described in detail in the above embodiments, which will not be described in detail herein.
In the related art, for example, in a convenience store, products are displayed at a low temperature using a showcase and heating is performed using an air conditioner, and both systems of the low temperature display and the air conditioner are independent of each other. The condenser unit 32 is used only for cooling the showcase, and thus the first outdoor unit heat exchanger 301 of the condenser unit 32 is used as a condenser, and the condenser condenses and releases heat to the outside when cooling the showcase. The air conditioner is used for refrigerating the indoor in summer and heating the indoor in winter. In winter, the air conditioner heats the indoor space, and the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner is used as an evaporator to absorb heat in the outside air and transfer and release the heat to the indoor space through a refrigerant, so as to heat the indoor space. In winter, the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner is used as an evaporator, and during evaporation and heat absorption of the second outdoor unit heat exchanger 401, the temperature is reduced, a frosting problem may occur, and defrosting treatment is required. In the related art, in winter, the air conditioner performs defrosting, if the air conditioner is switched to the cooling operation mode, the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner is used as a condenser, defrosting of the outdoor heat exchanger is performed by means of high-temperature and high-pressure refrigerant vapor discharged by a compressor, heating switching to cooling causes indoor temperature fluctuation, and if an additional heating module is used for heating the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner, energy consumption is additionally increased. In the low temperature display system in the convenience store, the first outdoor unit heat exchanger 301 of the condensing unit 32 is used as a condenser, and the heat released by the condenser is wasted compared with the defrosting requirement of the air conditioner.
By adopting the above scheme of the application, the condensing unit 32 and the air-conditioning external unit 41 are designed to be part of an external unit (please refer to the part shown above the horizontal dotted line in fig. 4) of the low-temperature display and air-conditioning integrated system, the first external unit heat exchanger 301 of the condensing unit 32 and the second external unit heat exchanger 401 of the air-conditioning external unit 41 are arranged in parallel, when the second external unit heat exchanger 401 of the air-conditioning external unit 41 works as an evaporator in winter, evaporation absorbs heat, the first external unit heat exchanger 301 of the condensing unit 32 arranged in parallel condenses and releases heat, the second external unit heat exchanger 401 can prevent self-frosting by using the heat released by the first external unit heat exchanger 301 of the condensing unit 32, further utilization of the heat released by the first external unit heat exchanger 301 of the condensing unit 32 is realized, and energy efficiency can be comprehensively improved.
As shown in fig. 4, in one embodiment, the system further comprises:
an outer unit fan 501 configured to: when the second outdoor heat exchanger 401 operates as an evaporator, the fan guides heat generated by the first outdoor heat exchanger 301 to the second outdoor heat exchanger 401.
Specifically, the outdoor unit fan 501 is formed in an outdoor unit of the integrated low-temperature display and air-conditioning system, as shown in fig. 4, an arrow group of the outdoor unit fan 501 indicates a blowing direction, and the relationship among the outdoor unit fan 501, the first outdoor unit heat exchanger 301, and the second outdoor unit heat exchanger 401 is as follows: in winter, when the first external unit heat exchanger 301 of the condensing unit 32 and the second external unit heat exchanger 401 of the external air conditioner unit 41 both work and operate, the air blowing formed by the external unit fan 501 blows heat condensed and released by the first external unit heat exchanger 301 of the condensing unit 32 onto the second external unit heat exchanger 401 of the external air conditioner unit 41, and a higher-temperature environment is quickly formed around the second external unit heat exchanger 401 to prevent the second external unit heat exchanger 401 from frosting.
As shown in fig. 4, in one embodiment, the system further comprises:
a showcase 31 in which the first outdoor unit heat exchanger 301 is formed, and the condenser unit 32 form a first refrigerant circulation circuit;
the air conditioner internal unit 42 and the air conditioner external unit 41 form a second refrigerant circulation loop, wherein the second external unit heat exchanger 401 is formed in the second refrigerant circulation loop; and
the double-pipe heat exchanger 502 is provided with a first refrigerant channel and a second refrigerant channel, the first refrigerant channel is connected in series with the first refrigerant circulation loop, and the second refrigerant channel is connected in series with the second refrigerant circulation loop.
Specifically, in the low-temperature display and air-conditioning integrated system, a first refrigerant circulation loop and a second refrigerant circulation loop are formed, wherein the first refrigerant circulation loop is used for displaying commodities at low temperature, and the second refrigerant circulation loop is used for refrigerating or heating the indoor space. The double-pipe heat exchanger 502 is used for exchanging heat between the two refrigerants, so that the supercooling degree of the first refrigerant circulation loop and the superheat degree of the second refrigerant circulation loop are improved in winter, the refrigerating capacity of the display cabinet 31 and the indoor heating capacity are improved, and the respective capacities of the two refrigerants can be effectively improved after the two refrigerants are combined.
As shown in fig. 4, in one embodiment, the first refrigerant channel is connected in series to a flow path between the first outdoor unit heat exchanger 301 and the showcase 31; and
the second refrigerant passage is connected in series to a flow path on a refrigerant outflow side of the air conditioner indoor unit 42 when the air conditioner indoor unit 42 is refrigerating.
Specifically, under the condition that both the first outdoor unit heat exchanger 301 of the condensing unit 32 and the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner operate, in summer, both the first outdoor unit heat exchanger 301 of the condensing unit 32 and the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner serve as condensers, the first refrigerant circulation loop is used for displaying commodities at low temperature, and the second refrigerant circulation loop is used for refrigerating the indoor space. The refrigerant coming out of the first outdoor unit heat exchanger 301 (condenser) and going into the evaporator of the showcase 31 for evaporation and heat absorption is transmitted from the first refrigerant channel of the double pipe heat exchanger 502, the refrigerant coming out of the indoor unit and going through evaporation and heat absorption is transmitted from the second refrigerant channel of the double pipe heat exchanger 502, and the two refrigerants exchange heat in the double pipe heat exchanger 502, so that the degree of supercooling of the refrigerant output from the first refrigerant channel is further improved, and the degree of superheat of the refrigerant output from the second refrigerant channel is further improved.
In winter, the first outdoor unit heat exchanger 301 of the condensing unit 32 is still used as a condenser, the first refrigerant circulation loop is still used for displaying commodities at low temperature, the refrigerant circulation direction in the first refrigerant circulation loop is unchanged, and the refrigerant which comes out of the first outdoor unit heat exchanger 301 (condenser) and is to enter the evaporator of the display cabinet 31 for evaporation and heat absorption is transmitted from the first refrigerant channel of the double-pipe heat exchanger 502; and the second refrigerant circulation loop is switched to be used for heating the indoor space, in the second refrigerant circulation loop, the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner is used as an evaporator, the heat exchanger in the indoor unit 42 of the air conditioner is used as a condenser, the second refrigerant circulation loop firstly enters the indoor unit and then enters the second outdoor unit heat exchanger 401 of the outdoor unit 41 of the air conditioner, and before entering the indoor unit, the refrigerant in the second refrigerant circulation loop exchanges heat with the refrigerant coming out of the first outdoor unit heat exchanger 301 (condenser) of the condensing unit 32 in the double pipe heat exchanger 502, so that the superheat degree of the refrigerant entering the indoor unit is increased, and the supercooling degree of the refrigerant entering the showcase 31 is increased.
As shown in fig. 4, in one embodiment, the condensing unit 32 further includes: a first compressor 302, the first compressor 302 being formed in the first refrigerant circulation circuit;
further, the first refrigerant circulation circuit is provided with: and a first throttling element 503, wherein the first throttling element 503 is arranged on a flow path between the first outdoor unit heat exchanger 301 and the showcase 31.
Specifically, the first throttling element 503 may be an electronic expansion valve, a thermal expansion valve, a capillary tube, or other throttling components.
For the components in the related embodiments, reference may be made to the related contents of the low temperature display system in the related art, and further description is not given here.
Further, the showcase 31 is plural.
Further, the unit capacity of the condensing unit 32 is matched to the showcase 31 having the largest refrigerating capacity.
Specifically, the condensing unit 32 adopts a mode of dragging a plurality of display cabinets 31, in the related art, for the model selection of the condensing unit 32, the plurality of display cabinets 31 are simultaneously opened for cooling, and the temperature is reduced to the minimum temperature required by a user, in the model selection mode, the unit capacity of the condensing unit 32 is matched with the sum of the refrigerating capacities of all the display cabinets 31, and the problem that when the condensing unit 32 only controls one display cabinet 31, the unit capacity far exceeds the refrigerating requirement of a single display cabinet 31, the problem that the model selection of the condensing unit 32 is too large exists, when the single display cabinet 31 is refrigerated, the refrigerating is too fast, the condensing unit 32 is frequently started and stopped, and the condensing unit 32 cannot normally return oil, and the compressor is damaged is caused.
Through the scheme of the embodiment, the unit capacity of the condensing unit 32 is matched with the display cabinet 31 with the largest refrigerating capacity, and by adopting the related control method of the display cabinet 31, the unit capacity is not too large in the process of controlling a single display cabinet 31 by the condensing unit 32, the starting and stopping frequency of the condensing unit 32 can be effectively reduced, and the operation safety of the condensing unit 32 is improved.
As shown in fig. 4, in one embodiment, the external air conditioning unit 41 further includes: a second compressor 402 and a four-way valve 403, wherein the second compressor 402 and the four-way valve 403 are formed in the second refrigerant circulation circuit.
Further, the second refrigerant circulation circuit is provided with: and a second throttling element 504, wherein the second throttling element 504 is arranged on a flow path between the second outdoor heat exchanger 401 and the air conditioner indoor unit 42.
Specifically, the second throttling element 504 may be an electronic expansion valve, a thermal expansion valve, a capillary tube, or other throttling components.
Further, there are a plurality of air conditioner indoor units 42.
For each component in the related embodiments, reference may be made to related contents of an air conditioning system in the related art, and further details are not described herein.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Further, "connected" as used herein may include wirelessly connected. The term "and/or" is used to include any and all combinations of one or more of the associated listed items.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (14)
1. A showcase control method characterized by comprising:
step S11, sequentially performing refrigeration start-stop control on a plurality of display cabinets according to preset numbering sequences of the display cabinets and the lower limit target temperatures of the display cabinets;
step S12 of acquiring the cooling temperature of each showcase, and comparing the cooling temperature of each showcase with the upper limit target temperature corresponding thereto;
step S13 is to turn on the cooling operation of the showcase whose cooling temperature is closest to the upper limit target temperature, and to turn off the turned-on cooling operation when the cooling temperature reaches the lower limit target temperature, based on the temperature comparison result of each showcase, and the process proceeds to step S12.
2. The method according to claim 1, wherein the step S11 includes:
s111, according to the preset serial number sequence, starting refrigeration of the display cabinet corresponding to the first serial number;
s112, when the temperature reaches the lower limit target temperature, closing the opened refrigeration, and opening the refrigeration of the display cabinet corresponding to the next sequence number;
and S113, repeatedly executing 112 until the refrigeration start-stop control of the last numbered showcase is completed.
3. A low temperature display system, comprising:
a plurality of showcases, an
A condensing unit, wherein the condensing unit controls a plurality of the showcases by the method according to claim 1 or 2.
4. The system of claim 3, wherein the condensing unit has a unit capacity matched to the display case having the highest refrigeration capacity.
5. A low temperature display and air conditioning integrated system comprising:
a condensing unit, wherein the condensing unit is capable of performing the steps of the method of claim 1 or 2; and
an air conditioner external unit;
wherein the content of the first and second substances,
the condensing unit includes: the first outdoor unit heat exchanger is a condenser;
the outer unit of air conditioner includes: a second outdoor unit heat exchanger;
the second external machine heat exchanger and the first external machine heat exchanger are arranged in parallel, so that when the second external machine heat exchanger works as an evaporator, the second external machine heat exchanger can prevent the second external machine heat exchanger from frosting by utilizing heat emitted by the first external machine heat exchanger.
6. The system of claim 5, further comprising:
the showcase and the condensing unit form a first refrigerant circulation loop, wherein the first outer unit heat exchanger is formed in the first refrigerant circulation loop;
the air conditioner indoor unit and the air conditioner outdoor unit form a second refrigerant circulation loop, wherein the second outdoor heat exchanger is formed in the second refrigerant circulation loop; and
the double-pipe heat exchanger is provided with a first refrigerant channel and a second refrigerant channel, the first refrigerant channel is connected in series with the first refrigerant circulation loop, and the second refrigerant channel is connected in series with the second refrigerant circulation loop.
7. The system according to claim 5 or 6, characterized in that it further comprises:
an outer unit fan configured to: when the second outdoor unit heat exchanger works as an evaporator, the fan guides heat generated by the first outdoor unit heat exchanger to the second outdoor unit heat exchanger.
8. The system of claim 6,
the first refrigerant channel is connected in series with a flow path between the first outer machine heat exchanger and the display cabinet; and
the second refrigerant channel is connected in series with a flow path at the refrigerant outflow side of the air conditioner indoor unit when the air conditioner indoor unit is refrigerating.
9. The system of claim 6, wherein the condensing unit comprises: a first compressor formed in the first refrigerant circulation circuit.
10. The system according to claim 6 or 9, wherein the first refrigerant circulation circuit further comprises: a first throttling element disposed on a flow path between the first outer unit heat exchanger and the showcase.
11. The system of claim 6, wherein the outdoor unit of air conditioners further comprises: and the second compressor and the four-way valve are formed in the second refrigerant circulating loop.
12. The system according to claim 6 or 11, wherein the second refrigerant circulation circuit further comprises: and the second throttling element is arranged on a flow path between the second external machine heat exchanger and the internal machine of the air conditioner.
13. The system of claim 6, wherein there are a plurality of display cases.
14. The system of claim 13, wherein the condensing unit has a unit capacity matched to the display case having the highest refrigeration capacity.
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|---|---|---|---|
| CN201910949299.8A CN110779254A (en) | 2019-10-08 | 2019-10-08 | Showcase control method and related system |
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| CN201910949299.8A CN110779254A (en) | 2019-10-08 | 2019-10-08 | Showcase control method and related system |
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| CN201910949299.8A Pending CN110779254A (en) | 2019-10-08 | 2019-10-08 | Showcase control method and related system |
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