A high-efficiency combined ice-making system and control method thereof

Abstract

The present invention discloses a high-efficiency combined ice-making system and a control method thereof, which comprises a base frame (10), an ice-making device (20), a refrigeration system (30), an ice storage device (40), a water supply system (50), a generator set (60), and a control system. The refrigeration system is connected to the ice-making device, the downstream of the ice-making device is connected to the ice storage device, and the water supply system is connected to the ice-making device and the ice storage device respectively. The ice-making device is characterized in that the ice-making device comprises a plurality of ice-making units connected in series, each ice-making unit comprises an ice-making cylinder (21), a first motor assembly (22), and a connecting pipe (23), two adjacent ice-making cylinders are connected by a connecting pipe, and each ice-making unit is connected to its own refrigeration system. The present invention realizes step-by-step refrigeration, can effectively improve the ice-making efficiency of liquid ice, can adapt to more working conditions or ice-making mode requirements, and has more refined and accurate regulation and control, higher ice-making efficiency, more stability, and reduced energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of ice making systems / devices, and in particular to a high-efficiency combined ice making system and a control method thereof, which are used for the production and storage of fluid ice (such as smoothies, ice slurries, ice chips, etc.). Background Art

[0002] Existing modular ice-making systems, used for producing and storing liquid ice (such as smoothies, ice slurries, and ice chips), often increase power exponentially to improve ice-making efficiency, or utilize a single high-power refrigeration system to power multiple ice-making devices / units. However, these systems still struggle to adapt to diverse operating conditions or ice-making modes, lack precise control, and require further improvement in both ice-making efficiency and stability. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-efficiency combined ice-making system and a control method thereof. The present invention realizes step-by-step refrigeration from the first-stage ice-making unit to the last-stage ice-making unit by connecting multiple combined ice-making units in series, and each ice-making unit is connected to its own and independent refrigeration system respectively; the control system is adjusted in real time and dynamically based on temperature values ​​and flow values, and is matched with different set power / speeds and adjusted power / speeds, which can effectively improve the ice-making efficiency of liquid ice, can adapt to more working conditions or ice-making mode requirements, and the adjustment control is more refined and precise, the ice-making efficiency is higher and more stable, and energy consumption is reduced.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A high-efficiency combined ice-making system comprises a base frame (10), an ice-making device (20), a refrigeration system (30), an ice storage device (40), a water supply system (50), a generator set (60), and a control system. The ice-making device, the refrigeration system, the ice storage device, the water supply system, and the generator set are all mounted on the base frame. The refrigeration system is connected to the ice-making device and is used to provide cooling capacity for the ice-making device. The downstream of the ice-making device is connected to the ice storage device. The water supply system is connected to the ice-making device and the ice storage device respectively. The water supply system is connected to a water source. The generator set is used to supply power to each power device. The invention is characterized in that: the ice-making device (20) includes a plurality of ice-making units, the plurality of ice-making units are connected in series, each ice-making unit includes an ice-making cylinder (21), a first motor assembly (22), and a connecting pipe (23), a spiral scraper-type ice-delivering mechanism is provided in the ice-making cylinder, the first motor assembly is in transmission connection with the spiral scraper-type ice-delivering mechanism, two adjacent ice-making cylinders are connected via a connecting pipe, the upstream end of the connecting pipe is connected to the upper end outlet pipe of the upper-stage ice-making unit, and the downstream end of the connecting pipe is connected to the bottom end inlet pipe of the lower-stage ice-making unit, and each ice-making unit is connected to its own and independent refrigeration system (30).

[0006] Furthermore, the refrigeration system (30) includes a compressor (31), a condenser, an evaporator, an expansion valve, and a fan (32), and each refrigeration system is used to provide refrigeration capacity for the ice-making unit connected thereto; the ice storage device (40) includes a storage bin (41), a second motor assembly (42), an ice delivery pipe (43), and a control valve; a stirring mechanism is provided in the storage bin, the stirring mechanism is connected to the second motor assembly via a transmission belt, the bottom end of the storage bin is connected to the ice delivery pipe, and liquid ice is delivered to a place or equipment requiring ice via the ice delivery pipe and the ice delivery mechanism.

[0007] Furthermore, the water supply system (50) includes a main water pump (51), a return pipe (52), a water supply pipe, and a control valve. The downstream end of the water supply pipe is connected to the bottom inlet pipe of the first-stage ice-making unit. The main water pump is connected to the water supply pipe. The first branch pipe at the upstream end of the water supply pipe is connected to the water source. The second branch pipe at the upstream end of the water supply pipe is connected to the return pipe. The return pipe is arranged at the bottom of the ice storage bin and is used for the return and recycling of water in the ice storage bin. One or more control valves are arranged on the water supply pipe. The generator set (60) is a diesel or gasoline generator set.

[0008] Furthermore, the ice-making device (20) includes four-stage ice-making units, the rated power of the first motor group (22) corresponds to the corresponding motor speed and the corresponding speed of the spiral scraper type ice-delivering mechanism, and the rated powers of the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit are equal and are all P; the rated cooling capacity of the refrigeration system (30) corresponds to the power / speed of the corresponding compressor (31) and the power / speed of the corresponding fan (32), and the rated cooling capacity of the refrigeration system corresponding to the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit is equal and is all W.

[0009] Furthermore, the rated power of the first motor assembly (22) corresponds to the corresponding motor speed and the speed of the corresponding spiral scraper ice delivery mechanism, and the rated power of the first motor assembly of the first-stage ice-making unit and the second-stage ice-making unit is 0.7-0.8 times the rated power P of the third-stage ice-making unit and the fourth-stage ice-making unit, that is, 0.7-0.8P; the rated cooling capacity of the refrigeration system (30) corresponds to the power / speed of the corresponding compressor (31) and the power / speed of the corresponding fan (32), and the rated cooling capacity of the refrigeration system corresponding to the first-stage ice-making unit and the second-stage ice-making unit is 0.7-0.8 times the rated cooling capacity W of the refrigeration system corresponding to the third-stage ice-making unit and the fourth-stage ice-making unit, that is, 0.7-0.8W.

[0010] Furthermore, the first motor assembly (22), the main water pump (51), the compressor (31), and the second motor assembly (42) all adopt stepless speed regulation control and / or variable frequency control.

[0011] Furthermore, the ice-making device (20) includes four-stage ice-making units, the rated powers of the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit are all equal to P, and the rated cooling capacities of the refrigeration systems (30) corresponding to the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit are all equal to W; the rated cooling capacities of the refrigeration systems correspond to the power / speed of the corresponding compressors (31) and the power / speed of the corresponding fans (32), and the rated cooling capacities of the refrigeration systems corresponding to the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit are all equal to W; the power / speed of the first-stage ice-making unit and the second-stage ice-making unit are equal to W; A first electric control valve (24) is connected to the connecting pipe (23) between the third-stage ice-making unit and the fourth-stage ice-making unit; a second electric control valve is connected to the connecting pipe between the third-stage ice-making unit and the fourth-stage ice-making unit; two ends of the first bypass pipe (25) are respectively connected to the connecting pipes upstream and downstream of the second-stage ice-making unit; two ends of the second bypass pipe (27) are respectively connected to the connecting pipes upstream and downstream of the fourth-stage ice-making unit; a first auxiliary water pump (26) and a control valve are connected to the first bypass pipe; and a second auxiliary water pump (28) and a control valve are connected to the second bypass pipe; a temperature sensor for detecting the temperature of the ice-water mixed medium therein is provided at the upper end of the ice-making cylinder (21); and a flow sensor for detecting the flow rate in the pipe is provided at the upstream end of the connecting pipe (23).

[0012] A control method for a high-efficiency combined ice-making system comprises the following steps:

[0013] Step S1: The control system presets the temperature value of the temperature sensor x the flow value of the preset flow sensor = the preset standard value, that is, the preset temperature value T x the preset flow value Q = the preset standard value E;

[0014] Step S2: The control system sets two working modes to be selected, mode 1 is a normal ice making mode, and mode 2 is a small amount of fast ice making mode;

[0015] Step S3: When mode 1 is selected: the two electric control valves (24) are opened, the control valves at the upstream ends of the first auxiliary water pump (26) and the second auxiliary water pump (28) are closed, the four-stage ice-making units are connected in series, the operating power of the first-stage ice-making unit and the second-stage ice-making unit is 0.75-0.85P, the operating power of the third-stage ice-making unit and the fourth-stage ice-making unit is 0.85-0.95P, and the operating cooling capacity of the refrigeration system (30) is 0.8-0.9W; when mode 2 is selected: the two electric control valves (24) are closed, the control valves at the upstream ends of the first auxiliary water pump (26) and the second auxiliary water pump (28) are opened, only the first-stage ice-making unit and the third-stage ice-making unit are connected in series, the operating power of the first-stage ice-making unit and the third-stage ice-making unit is 0.9-1.0P, and the operating cooling capacity of the refrigeration system 30 is 0.9-1.0W.

[0016] Furthermore, in step S3:

[0017] Step S3-11: In mode 1 / normal ice-making mode: the measured temperature value tx the measured flow value q=the measured value e. For the first-stage ice-making unit and the second-stage ice-making unit, when the measured value e≠the preset standard value E, it is determined that the cause is the temperature value or the flow value; if the measured temperature value t>the preset temperature value T, the operating refrigeration capacity of the refrigeration system (30) is increased according to the first preset relationship; if the measured flow value q<the preset flow value Q, the operating power / speed of the main water pump (51) is increased according to the second preset relationship, and / or the operating power / speed of the first motor assembly (22) is increased;

[0018] Step S3-12: For the third-stage ice-making unit and the fourth-stage ice-making unit, when the measured value e≠the preset standard value E, it is determined whether it is caused by the temperature value or the flow value; if the measured temperature value t>the preset temperature value T, the operating refrigeration capacity of the refrigeration system (30) is increased according to the third preset relationship; if the measured flow value q<the preset flow value Q, the operating power / speed of the main water pump (51) is increased according to the fourth preset relationship, and / or the operating power / speed of the first motor assembly (22) is increased;

[0019] The adjustment range of the first preset relationship is smaller than the adjustment range of the third preset relationship, and the adjustment range of the second preset relationship is larger than the adjustment range of the fourth preset relationship.

[0020] Furthermore, in step S3:

[0021] Step S3-21: In mode 2 / small amount of rapid ice making mode: the measured temperature value tx the measured flow value q=the measured value e, for the first-stage ice making unit and the third-stage ice making unit, when the measured value e≠the preset standard value E, it is determined that it is caused by the temperature value or the flow value; if the measured temperature value t>the preset temperature value T, the operating refrigeration capacity of the refrigeration system (30) is increased by 1.0W, and if the measured flow value q<the preset flow value Q, the operating power / speed of the main water pump (51) and / or the operating power / speed of the first motor assembly (22) are increased, and the operating power / speed of the first auxiliary water pump (26) and the second auxiliary water pump (26) are increased; wherein the adjustment range of the first auxiliary water pump is greater than the adjustment range of the second auxiliary water pump.

[0022] The high-efficiency combined ice-making system and control method thereof of the present invention have the following beneficial technical effects:

[0023] (1) The present invention connects a plurality of combined ice-making units in series, and each ice-making unit is connected to its own and independent refrigeration system, thereby realizing step-by-step refrigeration (such as four-stage step-by-step refrigeration) from the first stage ice-making unit to the last stage ice-making unit. Compared with single-stage refrigeration ice-making using multiple times the power (such as four times), the present invention can effectively improve the ice-making efficiency of the fluidized ice, and the control is more refined and accurate, the ice-making efficiency is more stable, and the energy consumption is reduced.

[0024] (2) The present invention realizes real-time and dynamic adjustment based on temperature and flow values ​​through the control system, and matches different set power / speed and adjustment power / speed, thereby realizing step-by-step refrigeration from the first-stage ice-making unit to the last-stage ice-making unit, and can adapt to more working conditions or ice-making mode requirements, and the adjustment control is more refined and accurate, the ice-making efficiency is higher and more stable, and energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an axonometric diagram of the high-efficiency combined ice-making system of the present invention;

[0026] Figure 2 This is a first isometric schematic diagram of the high-efficiency combined ice-making system of the present invention;

[0027] Figure 3 This is a second isometric schematic diagram of the high-efficiency combined ice-making system of the present invention;

[0028] Figure 4 This is a schematic diagram of the top view of the high-efficiency combined ice-making system of the present invention;

[0029] Figure 5 This is a schematic diagram of the control principle of the second embodiment of the high-efficiency combined ice-making system of the present invention.

[0030] In the figure: chassis 10, ice-making device 20, refrigeration system 30, ice storage device 40, water supply system 50, generator set 60; ice-making cylinder 21 (including a spiral scraper-type ice delivery mechanism), first motor assembly 22, connecting pipe 23, electric control valve 24, first bypass pipe 25, first auxiliary water pump 26, second bypass pipe 27, second auxiliary water pump 28, compressor 31, fan 32, ice storage bin / bucket 41 (including a stirring mechanism), second motor assembly 42, ice delivery pipe 43, main water pump 51, return pipe 52. DETAILED DESCRIPTION

[0031] To make the technical solution and its advantages of the present invention more clear, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of the present invention and are only used to explain the present invention, not to limit the present invention. It should be noted that, for ease of description, the accompanying drawings only show the parts / structures related to the present invention. Other related parts can refer to the general design. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0032] All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention. Furthermore, unless otherwise defined, technical or scientific terms used in the description of the present invention shall have the same ordinary meanings as those understood by persons of ordinary skill in the art to which the present invention belongs.

[0033] The present invention will be described in further detail below with reference to the accompanying drawings.

[0034] like Figure 1-4 As shown, a high-efficiency combined ice-making system includes a base frame 10, an ice-making device 20, a refrigeration system 30, an ice storage device 40, a water supply system 50, a generator set 60, and a control system. The ice-making device 20, the refrigeration system 30, the ice storage device 40, the water supply system 50, and the generator set 60 are all installed on the base frame 10 and provided with an integral outer cover (not shown). The refrigeration system 30 is connected to the ice-making device 20 to provide cooling capacity for the ice-making device 20. The downstream of the ice-making device 20 is connected to the ice storage device 40. The water supply system 50 is connected to the ice-making device 20 and the ice storage device 40 respectively. The water supply system 50 is connected to a water source / water tank. The generator set 60 is used to supply power to each power device; it is characterized in that: the ice-making device 20 includes multiple ice-making units, and the multiple ice-making units are connected in series. Each ice-making unit includes an ice-making cylinder 21, a first motor assembly 22, and a connecting pipe 23. A spiral scraper-type ice-delivering mechanism is provided in the ice-making cylinder 21. The first motor assembly 22 is transmission-connected to the spiral scraper-type ice-delivering mechanism. Two adjacent ice-making cylinders 21 are connected by a connecting pipe 23. The upstream end of the connecting pipe 23 is connected to the upper outlet pipe of the upper-level ice-making unit, and the downstream end of the connecting pipe 23 is connected to the bottom inlet pipe of the next-level ice-making unit. Each ice-making unit is connected to its own and independent refrigeration system 30.

[0035] The present invention provides a high-efficiency combined ice-making system and a control method thereof, which realizes step-by-step refrigeration (such as four-stage step-by-step refrigeration) from the first-stage ice-making unit to the last-stage ice-making unit by connecting multiple combined ice-making units in series, and each ice-making unit is connected to its own and independent refrigeration system 30. Compared with single-stage refrigeration ice-making using multiple times the power (such as four times), it can effectively improve the ice-making efficiency of liquid ice, and the control is more refined and precise, the ice-making efficiency is more stable, and energy consumption is reduced.

[0036] The ice-making unit of the ice-making device 20 adopts the ice-making device / ice-making unit shown in the prior art CN108332465A, CN207831744U or CN108645085A.

[0037] The refrigeration system 30 is a well-known refrigeration system, which includes a compressor 31, a condenser, an evaporator, an expansion valve, a fan 32, etc. Each refrigeration system 30 is used to provide cooling capacity for the ice-making unit connected thereto.

[0038] The ice storage device 40 includes a storage bin / bucket 41, a second motor assembly 42, an ice delivery pipe 43, and a control valve. A stirring mechanism is provided within the storage bin 41. The stirring mechanism and the second motor assembly 42 are connected via a transmission belt / belt assembly. The bottom end of the storage bin 41 is connected to the ice delivery pipe 43. Liquid ice can be delivered to places or equipment requiring ice via the ice delivery pipe 43 and the ice delivery mechanism / ice delivery pump.

[0039] The water supply system 50 includes a main water pump 51, a return pipe 52, a water supply pipe, and a control valve. The downstream end of the water supply pipe is connected to the bottom inlet pipe of the first-stage ice-making unit. The main water pump 51 is connected to the water supply pipe. The first branch pipe at the upstream end of the water supply pipe is connected to the water source / water tank. The second branch pipe at the upstream end of the water supply pipe is connected to the return pipe 52. The return pipe 52 is set at the bottom of the ice storage bin 41. The return pipe 52 is used for the return and recycling of water in the ice storage bin 41. One or more control valves are set on the water supply pipe.

[0040] The generator set 60 is a diesel or gasoline generator set, and is used to supply power to various power devices so as to adapt to places / working conditions where outdoor power supply is inconvenient.

[0041] In one embodiment, the ice-making device 20 includes four-stage ice-making units. The rated power of the first motor assembly 22 corresponds to the corresponding motor speed and the corresponding speed of the spiral scraper ice-delivering mechanism. The rated power of the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit are equal and are all P.

[0042] The rated cooling capacity of the refrigeration system 30 corresponds to the power / speed of the corresponding compressor 31 and the power / speed of the corresponding fan 32. The rated cooling capacity of the refrigeration system 30 corresponding to the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit is equal, which is W.

[0043] The present invention realizes step-by-step refrigeration from the first to the last ice-making unit by setting the rated power of the four-stage ice-making unit to P, which facilitates modular design of control procedures, replacement of parts / maintenance, and reduces energy consumption.

[0044] Furthermore, in one embodiment, the rated power of the first motor assembly 22 corresponds to the corresponding motor speed and the speed of the corresponding spiral scraper ice delivery mechanism. The rated power of the first motor assembly 22 of the first-stage ice-making unit and the second-stage ice-making unit is 0.7-0.8 times the rated power P of the third-stage ice-making unit and the fourth-stage ice-making unit, that is, 0.7-0.8P.

[0045] The rated cooling capacity of the refrigeration system 30 corresponds to the power / speed of the corresponding compressor 31 and the power / speed of the corresponding fan 32. The rated cooling capacity of the refrigeration system 30 corresponding to the first-stage ice-making unit and the second-stage ice-making unit is 0.7-0.8 times the rated cooling capacity W of the refrigeration system 30 corresponding to the third-stage ice-making unit and the fourth-stage ice-making unit, that is, 0.7-0.8W.

[0046] The present invention realizes step-by-step refrigeration from the first stage ice-making unit to the last stage ice-making unit by setting the four-stage ice-making units with different rated powers. It can adapt to more working conditions, and the adjustment and control are more refined and precise, the ice-making efficiency is higher and more stable, and energy consumption is reduced.

[0047] The first motor assembly 22, the main water pump 51, the compressor 31, and the second motor assembly 42 all adopt stepless speed control and / or variable frequency control.

[0048] Furthermore, if Figure 5As shown, in a preferred embodiment, the ice-making device 20 includes four-stage ice-making units, and the rated powers of the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit are all equal to P. The rated cooling capacity of the refrigeration system 30 corresponding to the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit is all equal to W. The rated cooling capacity of the refrigeration system 30 corresponds to the power / speed of the corresponding compressor 31 and the power / speed of the corresponding fan 32. The rated cooling capacity of the refrigeration system 30 corresponding to the first-stage ice-making unit, the second-stage ice-making unit, the third-stage ice-making unit, and the fourth-stage ice-making unit is equal to W. A first electrically controlled valve 24 is connected to the connecting pipe 23 between the ice units, a second electrically controlled valve is connected to the connecting pipe 23 between the third-stage ice-making unit and the fourth-stage ice-making unit, two ends of the first bypass pipe 25 are respectively connected to the connecting pipes 23 upstream and downstream of the second-stage ice-making unit, and two ends of the second bypass pipe 27 are respectively connected to the connecting pipes 23 upstream and downstream of the fourth-stage ice-making unit. A first auxiliary water pump 26 and a control valve are connected to the first bypass pipe 25, and a second auxiliary water pump 28 and a control valve are connected to the second bypass pipe 27. A temperature sensor for detecting the temperature of the ice-water mixture medium therein is provided at the upper end of the ice-making cylinder 21, and a flow sensor for detecting the flow rate in the pipe is provided at the upstream end of the connecting pipe 23.

[0049] A control method for a high-efficiency combined ice-making system comprises the following steps:

[0050] Step S1: The control system presets the temperature value of the temperature sensor x the flow value of the preset flow sensor = the preset standard value, that is, the preset temperature value T x the preset flow value Q = the preset standard value E (T, Q, E can be point values ​​or range values);

[0051] Step S2: The control system sets two working modes to be selected, mode 1 is a normal ice making mode, and mode 2 is a small amount of fast ice making mode;

[0052] Step S3: When mode 1 is selected: the two electric control valves 24 are opened, the control valves at the upstream ends of the first auxiliary water pump 26 and the second auxiliary water pump 28 are closed, the four-stage ice-making units are connected in series, the operating power of the first-stage ice-making unit and the second-stage ice-making unit is 0.75-0.85P, the operating power of the third-stage ice-making unit and the fourth-stage ice-making unit is 0.85-0.95P, and the operating cooling capacity of the refrigeration system 30 is 0.8-0.9W; when mode 2 is selected: the two electric control valves 24 are closed, the control valves at the upstream ends of the first auxiliary water pump 26 and the second auxiliary water pump 28 are opened, only the first-stage ice-making unit and the third-stage ice-making unit are connected in series, the operating power of the first-stage ice-making unit and the third-stage ice-making unit is 0.9-1.0P, and the operating cooling capacity of the refrigeration system 30 is 0.9-1.0W.

[0053] Step S3-11: In Mode 1 / Normal Ice-Making Mode: Measured temperature value t x measured flow value q = measured value e. For the first-stage ice-making unit and the second-stage ice-making unit, when the measured value e ≠ the preset standard value E, it is determined that the cause is the temperature value or the flow value. If the measured temperature value t is greater than the preset temperature value T, the operating cooling capacity of the refrigeration system 30 is increased according to a first preset relationship. If the measured flow value q is less than the preset flow value Q, the operating power / speed of the main water pump 51 and / or the operating power / speed of the first motor assembly 22 are increased according to a second preset relationship.

[0054] Step S3-12: For the third-stage ice-making unit and the fourth-stage ice-making unit, when the measured value e≠ the preset standard value E, it is determined that the cause is the temperature value or the flow value; if the measured temperature value t> the preset temperature value T, the operating cooling capacity of the refrigeration system 30 is increased according to the third preset relationship; if the measured flow value q< the preset flow value Q, the operating power / speed of the main water pump 51 and / or the operating power / speed of the first motor assembly 22 are increased according to the fourth preset relationship;

[0055] The adjustment range of the first preset relationship is smaller than the adjustment range of the third preset relationship, and the adjustment range of the second preset relationship is larger than the adjustment range of the fourth preset relationship;

[0056] Step S3-21: In Mode 2 / Small Quantity Rapid Ice Making Mode: Measured temperature value t x measured flow value q = measured value e. For the first-stage ice-making unit and the third-stage ice-making unit, when the measured value e ≠ the preset standard value E, it is determined that the cause is the temperature value or the flow value. If the measured temperature value t is greater than the preset temperature value T, the operating cooling capacity of the refrigeration system 30 is increased by 1.0 W. If the measured flow value q is less than the preset flow value Q, the operating power / speed of the main water pump 51 is increased, and / or the operating power / speed of the first motor assembly 22 is increased, and / or the operating power / speed of the first auxiliary water pump 26 and the second auxiliary water pump 28 are increased.

[0057] The adjustment range of the first auxiliary water pump 26 is greater than the adjustment range of the second auxiliary water pump 28 .

[0058] The control system is adjusted in real time and dynamically based on the temperature and flow values, so as to ultimately meet / conform to the set requirements of the preset standard value E.

[0059] The present invention realizes real-time and dynamic adjustment based on temperature and flow values ​​through a control system, and matches different set power / speed and adjusted power / speed, thereby realizing step-by-step refrigeration from the first-stage ice-making unit to the last-stage ice-making unit. It can adapt to more working conditions or ice-making mode requirements, and the adjustment control is more refined and precise, the ice-making efficiency is higher and more stable, and energy consumption is reduced.

[0060] The high-efficiency combined ice-making system and control method thereof of the present invention have the following beneficial technical effects:

[0061] (1) The present invention connects a plurality of combined ice-making units in series, and each ice-making unit is connected to its own and independent refrigeration system, thereby realizing step-by-step refrigeration (such as four-stage step-by-step refrigeration) from the first stage ice-making unit to the last stage ice-making unit. Compared with single-stage refrigeration ice-making using multiple times the power (such as four times), the present invention can effectively improve the ice-making efficiency of the fluidized ice, and the control is more refined and accurate, the ice-making efficiency is more stable, and the energy consumption is reduced.

[0062] (2) The present invention realizes real-time and dynamic adjustment based on temperature and flow values ​​through the control system, and matches different set power / speed and adjustment power / speed, thereby realizing step-by-step refrigeration from the first-stage ice-making unit to the last-stage ice-making unit, and can adapt to more working conditions or ice-making mode requirements, and the adjustment control is more refined and accurate, the ice-making efficiency is higher and more stable, and energy consumption is reduced.

[0063] The above-mentioned embodiments are illustrative of the present invention, not limiting thereof. It is understood that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency combined ice-making system comprising a chassis, an ice-making device, a refrigeration system, an ice storage device, a water supply system, a generator set, and a control system, wherein the refrigeration system is connected to the ice-making device, the downstream portion of the ice-making device is connected to the ice storage device, the water supply system is connected to the ice-making device and the ice storage device, respectively, and the water supply system is connected to a water source, and the generator set is used to power each power device; characterized in that: The ice-making device includes a plurality of ice-making units, which are connected in series. Each ice-making unit includes an ice-making cylinder, a first motor assembly, and a connecting pipe. A spiral scraper-type ice-delivering mechanism is provided in the ice-making cylinder. The first motor assembly is transmission-connected to the spiral scraper-type ice-delivering mechanism. Two adjacent ice-making cylinders are connected by a connecting pipe. The upstream end of the connecting pipe is connected to the upper outlet pipe of the upper-stage ice-making unit, and the downstream end of the connecting pipe is connected to the bottom inlet pipe of the lower-stage ice-making unit. Each ice-making unit is connected to its own and independent refrigeration system. The ice-making device includes four ice-making units. The rated power of the first motor assembly corresponds to the corresponding motor speed and the corresponding speed of the spiral scraper-type ice-delivering mechanism. The rated power of the first, second, third, and fourth ice-making units is equal, namely, P. The rated cooling capacity of the refrigeration system corresponds to the power / speed of the corresponding compressor and the power / speed of the corresponding fan. The rated cooling capacity of the refrigeration system corresponding to the first, second, third, and fourth ice-making units is equal, namely, W. The rated power of the first motor assembly of the first and second ice-making units is 0.7-0.8 times the rated power P of the third and fourth ice-making units, namely, 0.7-0.8P. The rated cooling capacity of the refrigeration system corresponding to the first and second ice-making units is 0.7-0.8 times the rated cooling capacity W of the refrigeration system corresponding to the third and fourth ice-making units, namely, 0.7-0.8W. The connecting pipe (23) between the first-stage ice-making unit and the second-stage ice-making unit is connected to a first electric control valve (24); the connecting pipe between the third-stage ice-making unit and the fourth-stage ice-making unit is connected to a second electric control valve; the two ends of the first bypass pipe (25) are respectively connected to the connecting pipes upstream and downstream of the second-stage ice-making unit; the two ends of the second bypass pipe (27) are respectively connected to the connecting pipes upstream and downstream of the fourth-stage ice-making unit; the first bypass pipe is connected to a first auxiliary water pump (26) and a control valve; the second bypass pipe is connected to a second auxiliary water pump (28) and a control valve; the upper end of the ice-making cylinder (21) is provided with a temperature sensor for detecting the temperature of the ice-water mixed medium therein; and the upstream end of the connecting pipe (23) is provided with a flow sensor for detecting the flow rate in the pipe.

2. A high-efficiency combined ice-making system according to claim 1, characterized in that: The refrigeration system (30) includes a compressor (31), a condenser, an evaporator, an expansion valve, and a fan (32). Each refrigeration system is used to provide refrigeration capacity for the ice-making unit connected thereto. The ice storage device (40) includes a storage bin (41), a second motor assembly (42), an ice delivery pipe (43), and a control valve. A stirring mechanism is provided in the storage bin, and the stirring mechanism is connected to the second motor assembly via a transmission belt. The bottom end of the storage bin is connected to the ice delivery pipe, and liquid ice is delivered to a place or equipment requiring ice via the ice delivery pipe and the ice delivery mechanism.

3. A high-efficiency combined ice-making system according to claim 2, characterized in that: The water supply system (50) comprises a main water pump (51), a return pipe (52), a water supply pipe, and a control valve. The downstream end of the water supply pipe is connected to the bottom inlet pipe of the first-stage ice-making unit. The main water pump is connected to the water supply pipe. The first branch pipe at the upstream end of the water supply pipe is connected to the water source. The second branch pipe at the upstream end of the water supply pipe is connected to the return pipe. The return pipe is arranged at the bottom of the ice storage bin and is used for the return and recycling of water in the ice storage bin. One or more control valves are arranged on the water supply pipe. The generator set is a diesel or gasoline generator set.

4. A high-efficiency combined ice-making system according to claim 3, characterized in that: The first motor assembly (22), the main water pump (51), the compressor (31), and the second motor assembly (42) all adopt stepless speed regulation control or frequency conversion control.

5. A control method for a high-efficiency combined ice-making system, comprising the high-efficiency combined ice-making system according to claim 3 or 4, comprising the following steps: Step S1: The control system presets the temperature value of the temperature sensor x the flow value of the preset flow sensor = the preset standard value, that is, the preset temperature value T x the preset flow value Q = the preset standard value E; Step S2: The control system sets two working modes to be selected, mode 1 is a normal ice making mode, and mode 2 is a small amount of fast ice making mode; Step S3: When mode 1 is selected: the two electric control valves are opened, the control valves at the upstream ends of the first auxiliary water pump (26) and the second auxiliary water pump (28) are closed, the four-stage ice-making units are connected in series, the operating power of the first-stage ice-making unit and the second-stage ice-making unit is 0.75-0.85P, the operating power of the third-stage ice-making unit and the fourth-stage ice-making unit is 0.85-0.95P, and the operating cooling capacity of the refrigeration system (30) is 0.8-0.9W; when mode 2 is selected: the two electric control valves are closed, the control valves at the upstream ends of the first auxiliary water pump (26) and the second auxiliary water pump (28) are opened, only the first-stage ice-making unit and the third-stage ice-making unit are connected in series, the operating power of the first-stage ice-making unit and the third-stage ice-making unit is 0.9-1.0P, and the operating cooling capacity of the refrigeration system (30) is 0.9-1.0W.

6. A control method for a high-efficiency combined ice-making system according to claim 5, characterized in that: In the step S3: Step S3-11: In mode 1 / normal ice-making mode: the measured temperature value tx the measured flow value q=the measured value e. For the first-stage ice-making unit and the second-stage ice-making unit, when the measured value e≠the preset standard value E, it is determined that the cause is the temperature value or the flow value; if the measured temperature value t>the preset temperature value T, the operating refrigeration capacity of the refrigeration system (30) is increased according to the first preset relationship; if the measured flow value q<the preset flow value Q, the operating power / speed of the main water pump (51) is increased according to the second preset relationship, and / or the operating power / speed of the first motor assembly (22) is increased; Step S3-12: For the third-stage ice-making unit and the fourth-stage ice-making unit, when the measured value e≠the preset standard value E, it is determined whether it is caused by the temperature value or the flow value; if the measured temperature value t>the preset temperature value T, the operating refrigeration capacity of the refrigeration system (30) is increased according to the third preset relationship; if the measured flow value q<the preset flow value Q, the operating power / speed of the main water pump (51) is increased according to the fourth preset relationship, and / or the operating power / speed of the first motor assembly (22) is increased; The adjustment range of the first preset relationship is smaller than the adjustment range of the third preset relationship, and the adjustment range of the second preset relationship is larger than the adjustment range of the fourth preset relationship.

7. A control method for a high-efficiency combined ice-making system according to claim 6, characterized in that: In the step S3: Step S3-21: In mode 2 / small amount of rapid ice making mode: the measured temperature value tx the measured flow value q=the measured value e, for the first-stage ice making unit and the third-stage ice making unit, when the measured value e≠the preset standard value E, it is determined that it is caused by the temperature value or the flow value; if the measured temperature value t>the preset temperature value T, the operating refrigeration capacity of the refrigeration system (30) is increased by 1.0W, and if the measured flow value q<the preset flow value Q, the operating power / speed of the main water pump (51) and / or the operating power / speed of the first motor assembly (22) are increased, and the operating power / speed of the first auxiliary water pump (26) and the second auxiliary water pump (28) are increased; wherein the adjustment range of the first auxiliary water pump is greater than the adjustment range of the second auxiliary water pump.

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