CN210832636U - Multi-purpose energy-saving integrated machine for ice storage, ice melting and heating - Google Patents
Multi-purpose energy-saving integrated machine for ice storage, ice melting and heating Download PDFInfo
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- CN210832636U CN210832636U CN201921712370.2U CN201921712370U CN210832636U CN 210832636 U CN210832636 U CN 210832636U CN 201921712370 U CN201921712370 U CN 201921712370U CN 210832636 U CN210832636 U CN 210832636U
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Abstract
The utility model relates to a hold, multi-purpose energy-conserving all-in-one of ice-melt heating belongs to air conditioner control system technical field, including a water route circulation control system, be equipped with air-cooled host computer in this system, be equipped with refrigerant circulation control system in the air-cooled host computer, water route circulation control system is including holding ice system, ice-melt system and refrigerating system, and air-cooled host computer still communicates in addition has customer side air conditioner, directly carries the heat of refrigerant circulation control system exchange to the customer side, forms heating system, avoids thermal secondary exchange, through integrating refrigerant and water system circulation pipeline, can solve and hold ice, refrigeration and the intelligent control that heats the air conditioner, actively respond the wrong peak of country and let the call of electricity, switch different mode in peak segment and valley segment, effectively reduced user's power consumption cost.
Description
Technical Field
The utility model relates to an air conditioner control system, in particular to hold, multi-purpose energy-conserving all-in-one of ice-melt heating.
Background
The peak staggering gives off electricity, and most of the electricity is reflected in the industrial electricity of large cities. In the peak section of the power consumption, the phenomenon of insufficient power supply often occurs, and in the valley section of the power consumption, the condition of excessive power quantity often occurs. If the electric energy of the valley section is converted into the cold energy to be stored and used in the peak section, the pressure of the power grid can be relieved, and the power grid can be balanced. In order to encourage peak-shifting electricity utilization in China, night electricity charge of some big cities is often far lower than daytime electricity charge. Central air conditioners are always large in power consumption, especially industrial refrigeration equipment, and ice melting and cold storage are generated at the same time.
In view of the current situation, the ice storage unit is mostly used for large-scale industrial cooling, and the ice melting is mostly carried out at a low temperature in the morning and a high temperature in the afternoon, so that the cold energy cannot be stably provided; besides planning the ice storage tank body, the selective purchasing of the refrigerating units, the control of the pipeline connection, the water path, the valve and the like between the refrigerating units and the ice storage tank body are needed, and the construction and operation cost is high. Heating air conditioner in winter mostly is other equipment, for realizing refrigeration and heating function, not only need build complicated waterway system, and area is big moreover, and control is complicated, and the cost is also higher.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's defect, the utility model provides a hold, multi-purpose energy-conserving all-in-one of ice-melt heating through with ice-storage system, ice-melt system and refrigerating system collection fit same water route circulation control system, has realized the good conversion between ice-storage, ice-melt and refrigerating system, and air-cooled host computer and customer side air conditioner are direct to be linked together, directly gets into the customer side with the heat that refrigerant circulation control system exchanged, realizes the heating function.
The technical scheme for realizing the purpose is as follows:
the utility model provides a multipurpose energy-saving integrated machine for ice storage, ice melting and heating, which comprises a waterway circulation control system, wherein an air cooling host machine is arranged in the waterway circulation control system, and a refrigerant circulation control system is arranged in the air cooling host machine;
the water path circulation control system comprises an ice storage system, an ice melting system and a refrigerating system, and the air cooling host is communicated with a client side air conditioner through a client side air conditioner pump to form a heating system;
the ice storage system comprises an air-cooled main machine, the air-cooled main machine is sequentially communicated with an ice storage electric valve, an ice storage groove, a water collector and an ice storage pump through an air-cooled main machine water outlet, and the ice storage pump is communicated with an air-cooled main machine water return port of the air-cooled main machine;
the ice melting system comprises an ice storage tank, a water collector, an ice melting pump and a plate heat exchanger which are sequentially communicated, wherein the plate heat exchanger is communicated with an ice storage tank water return port of the ice storage tank;
the refrigerating system comprises an air cooling main machine, a refrigerating electric valve, a plate type heat exchanger, a proportional electric valve, a water collector and an ice storage pump which are sequentially communicated, wherein the ice storage pump is communicated with a water return port of the air cooling main machine.
Furthermore, a liquid level sensor is installed in the ice storage tank and used for controlling the ice amount in the ice storage tank and preventing the ice storage tank from deforming due to excessive ice storage.
Furthermore, a stirring pump is installed on one side of the ice storage tank, and in the control process of the ice melting system, the stirring pump is intermittently started according to the temperature of inlet and outlet water of an air conditioner on the client side, so that the ice melting is accelerated or the ten thousand years of ice in the ice storage tank is prevented.
Furthermore, in the ice melting system, an ice storage tank water outlet and an ice storage tank water return port of the ice storage tank are respectively communicated with two ends of the proportional electric valve, and when the water inlet and outlet temperature of the client side air conditioner is lower than the target temperature and the ice melting pump operates at the minimum frequency, the proportional electric valve is opened according to the corresponding proportion, so that water in a pipeline of the ice melting system is partially or completely bypassed, the water quantity to the ice storage tank is reduced, and excessive ice melting is prevented.
Furthermore, in the heating system, the air-cooled host is also provided with an air-cooled host water outlet, a first manual two-way valve is arranged at the air-cooled host water outlet, a second manual two-way valve is arranged at the air-cooled host water return port, a water inlet of the client-side air conditioner is communicated between the first manual two-way valve and the air-cooled host, and a water outlet of the client-side air conditioner is communicated between the second manual two-way valve and the air-cooled host;
a third manual two-way valve is arranged between the client side air conditioner and the plate heat exchanger;
and when the ice storage system, the ice melting system or the refrigerating system is switched to the heating system, the first manual two-way valve, the second manual two-way valve and the third manual two-way valve are cut off, and the fourth manual two-way valve is opened, so that heat exchanged by the cold medium circulation control system in the air cooling host can directly enter the air conditioner at the client side, secondary exchange of heat is avoided, and heat loss is reduced.
Furthermore, a plate-exchange water inlet sensor is arranged at a water inlet end of a heat exchanger of the plate heat exchanger, and a plate-exchange water outlet sensor is arranged at a water outlet end of the heat exchanger of the plate heat exchanger and used for detecting circulating water at two ends of the plate heat exchanger.
Furthermore, a main engine backwater sensor is arranged at the air cooling main engine backwater port, and a main engine water outlet sensor is arranged at the air cooling main engine water outlet and used for detecting circulating water in the refrigerant circulation control system.
Furthermore, an air conditioner water inlet end of the client side air conditioner is provided with an air conditioner water inlet sensor, and an air conditioner water outlet end of the client side air conditioner is provided with an air conditioner water outlet sensor for detecting circulating water at two ends of the client side air conditioner.
Furthermore, circulating water used in the ice storage system, the ice melting system and the refrigerating system is ethylene glycol solution with the concentration not lower than 25%, so that the phenomenon of too low pressure of a refrigerant circulation control system is avoided.
Furthermore, circulating water used in the heating system is pure water, so that toxic components are prevented from being generated when the heating system is used at a client side.
Has the advantages that: compared with the prior art, the utility model has the difference that the utility model provides a hold, ice-melt heating multipurpose energy-saving all-in-one machine is provided with a water path circulation control system, an air cooling host machine is arranged in the system, a refrigerant circulation control system is arranged in the air cooling host machine, the water path circulation control system comprises an ice storage system, an ice-melt system and a refrigerating system, the air cooling host machine is also communicated with a client side air conditioner, the heat exchanged by the refrigerant circulation control system is directly transmitted to the client side to form a heating system, the secondary exchange of the heat is avoided, the intelligent control of the ice storage, the refrigeration and the heating air conditioner can be realized by integrating the refrigerant and the water system circulation pipeline, the water temperature is constant, the number calling of the electricity is led by the national peak staggering, different working modes are switched between the peak section and the valley section, the electricity consumption cost of the user is effectively reduced, in addition, the, the floor space is small, and the adaptability is very wide.
Drawings
Fig. 1 is a flow chart of the middle water path circulation control system of the utility model.
Fig. 2 is a flow chart of the ice storage mode of the present invention.
Fig. 3 is a flow chart of the ice melting mode of the present invention.
Fig. 4 is a flow chart of the cooling mode in the present invention.
Fig. 5 is a flow chart of the heating mode of the present invention.
Wherein, 1-an air-cooled main machine, 10-an air-conditioning pump, 101-an air-conditioning water outlet sensor, 102-an air-conditioning water inlet sensor, 11-an air-cooled main machine water outlet, 111-a main machine water outlet sensor, 12-an air-cooled main machine water return port, 121-a main machine water return sensor, 13-a first manual two-way valve, 14-a second manual two-way valve, 15-a third manual two-way valve, 16-a fourth manual two-way valve, 2-an ice accumulation electric valve, 3-an ice accumulation tank, 31-an ice accumulation tank water outlet, 32-an ice accumulation tank water return port, 33-a liquid level sensor, 34-a stirring pump, 4-a water collector, 5-an ice accumulation pump, 6-an ice melting pump, 7-a plate heat exchanger, 71-a plate water changing and water outlet sensor, 72-a plate water changing and 8-proportion electric valve, 9-refrigeration electric valve.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
Referring to fig. 1 and 2, the utility model provides a multipurpose energy-saving integrated machine for ice storage, melting and heating, which comprises a waterway circulation control system, wherein an air cooling host machine 1 is arranged in the waterway circulation control system, and a refrigerant circulation control system is arranged in the air cooling host machine 1;
the water path circulation control system comprises an ice storage system, an ice melting system and a refrigerating system, and the air cooling host 1 is communicated with a client side air conditioner through a client side air conditioner pump 10 to form a heating system;
and (3) an ice storage mode: the ice storage system comprises an air-cooled main machine 1, the air-cooled main machine 1 is sequentially communicated with an ice storage electric valve 2, an ice storage groove 3, a water collector 4 and an ice storage pump 5 through an air-cooled main machine water outlet 11, and the ice storage pump 5 is communicated with an air-cooled main machine water return port 12 of the air-cooled main machine 1.
Preferably, a liquid level sensor 33 is installed in the ice storage tank 3 for controlling the amount of ice in the ice storage tank 3 to prevent the ice storage tank 3 from being deformed due to excessive ice storage.
When the waterway circulation control system receives a starting signal, the ice storage electric valve 2 is started firstly, because the electric valves in the waterway take a certain time from full closing to full opening, the time is delayed for 90 seconds (the parameters can be set), then the liquid level height in the ice storage tank 3 is detected, and if the liquid level in the ice storage tank 3 is higher than the shutdown liquid level by 70 percent (the parameters can be set), the ice storage pump 5 is not started; if the liquid level in the current ice storage tank 3 is less than the shutdown liquid level by 70%, starting the ice storage pump 5, detecting whether the ice storage pump 5 has a fault, and if the ice storage pump 5 has the fault, closing the ice storage pump 5 for maintenance; if the system is not in fault, the air cooling host 1 is detected after delaying 180 seconds, if the air cooling host 1 is in fault, the system is closed for maintenance, and if the air cooling host 1 is normal, the air cooling host 1 (namely a refrigerant circulation control system) is opened for ice storage. And detecting whether the ice storage pump 5 and the air-cooled main machine 1 have faults in real time during operation, and if the faults occur, shutting down corresponding equipment. And when the liquid level in the ice storage tank 3 is more than 70 percent or a shutdown signal is detected, indicating that the ice storage is finished, closing the air-cooled main machine 1, the ice storage pump 5 and the ice storage electric valve 2.
In the ice storage mode, the temperature of the inlet and the outlet of the plate heat exchanger can be detected in real time, in case that the refrigeration electric valve is not closed tightly and cold water overflows, the water temperature detected by the plate water inlet sensor is smaller than the anti-freezing temperature (3 ℃ and can be set), the air-conditioning pump 10 is started to emit redundant cold energy into an air-conditioning water channel until the refrigeration electric valve is closed, the water temperature of the plate heat exchanger side reaches the original temperature value, and the freezing and the water pipe cracking of the air-conditioning side are prevented.
An ice melting mode: referring to fig. 1 and 3, the ice melting system comprises an ice storage tank 3, a water collector 4, an ice melting pump 6 and a plate heat exchanger 7 which are sequentially communicated, wherein the plate heat exchanger 7 is communicated with an ice storage tank water return port 32 of the ice storage tank 3.
Preferably, a stirring pump 34 is installed at one side of the ice storage tank 3, and in the control process of the ice melting system, the stirring pump 34 is intermittently started according to the temperature of inlet and outlet water of an air conditioner at a client side, so that the ice melting is accelerated or ten thousand years of ice in the ice storage tank 3 is prevented.
Preferably, in the ice-melting system, the ice storage tank water outlet 31 of the ice storage tank 3 and the ice storage tank water return port 32 are respectively communicated with two ends of the proportional electric valve 8, and when the water inlet and outlet temperature of the client side air conditioner is lower than the target temperature and the ice-melting pump 6 operates at the minimum frequency, the proportional electric valve 8 is opened according to the corresponding proportion, so that water in the pipeline of the ice-melting system is partially or completely bypassed, the water quantity to the ice storage tank 3 is reduced, and excessive ice melting is prevented.
When the water path circulation control system receives a starting signal, the ice-melting pump 6 and the air-conditioning pump 10 are started firstly, whether the ice-melting pump 6 and the air-conditioning pump 10 have faults or not is detected, if the ice-melting pump has faults, all equipment is closed, if the ice-melting pump has no faults, ice melting is started, the relation between the temperature of air-conditioning inlet and outlet water at a client side and a set target temperature is detected in real time in the ice melting process (T: the temperature of the air-conditioning inlet and outlet water, SP: the set target temperature, △ T: the temperature control range), when the temperature of the air-conditioning is higher than the target set temperature, the ice-melting pump 6 operates at the maximum frequency (50HZ), the ice storage tank stirring pump 34 is started every 10 minutes to circulate ice in the ice storage tank 3 to accelerate ice melting, so as to prevent the phenomenon of ten thousand years of ice, when the SP is not less than the T and not higher than the SP- △ T, the ice storage pump 5 performs equal ratio variable frequency adjustment, when the T is not less than the SP- △ T and operates at the minimum frequency (20HZ), and the ratio 8 is started, the opening adjustment is performed at 0-100%, so that the water path circulation control of the ice-melting pump is partially or the water path in the ice-melting pump is not too low, the ice-melting pump, the ice-.
A refrigeration mode: referring to fig. 1 and 4, the refrigeration system includes an air-cooled main machine 1, a refrigeration electric valve 9, a plate heat exchanger 7, a proportional electric valve 8, a water collector 4 and an ice storage pump 5 which are sequentially communicated, and the ice storage pump 5 is communicated with a water return port 12 of the air-cooled main machine.
The method is an emergency mode under special conditions that the ice storage quantity at night is not enough to support the cold consumed by the air conditioner all day, or the ice storage tank 3 cannot be maintained to store ice, and the like, when a waterway circulation control system receives a starting signal, a proportional electric valve 8 and a refrigeration electric valve 9 are firstly opened, the ice storage pump 5 and the air conditioning pump 10 are started after 90 seconds of delay (parameters can be set), whether the ice storage pump 5 and the air conditioning pump 10 have faults or not is detected, if the corresponding equipment has the faults, the air cooling main machine 1 is detected to be normal after 180 seconds of delay, if the air cooling main machine 1 is normal, the air cooling main machine 1 (namely a refrigerant circulation control system) is started for refrigeration, whether the ice storage pump 5, the air conditioning pump 10 and the air cooling main machine 1 have faults or not is detected in real time during operation, if the corresponding equipment has the faults or not are closed, the relation between the inlet and outlet temperature of the air conditioner and the set target temperature is detected in real time (T: the inlet and outlet water temperature of the air conditioner, SP: the set target temperature, △ T: the temperature control range of the temperature of the air conditioner is kept to be not less than the maximum operation capacity T- △, when the waterway circulation control system is started again, the air conditioning system is started, the whole waterway circulation control system is started again, the air conditioning water circulation control system is started again, and the whole waterway circulation control system is started, and the air conditioner is started again.
Heating mode: referring to fig. 1 and 5, in this mode, for air conditioning and heating in winter, the water outlet 12 of the air-cooled host is provided with a first manual two-way valve 13, the water return port 12 of the air-cooled host is provided with a second manual two-way valve 14, the water inlet of the client-side air conditioner is communicated between the first manual two-way valve 13 and the air-cooled host 1, and the water outlet of the client-side air conditioner is communicated between the second manual two-way valve 14 and the air-cooled host 1;
a third manual two-way valve 15 is arranged between the client-side air conditioner and the plate heat exchanger 7;
a fourth manual two-way valve 16 is arranged between the client-side air conditioner and the air-cooling host 1, when the ice storage system, the ice melting system or the refrigerating system is switched to the heating system, the first manual two-way valve 13, the second manual two-way valve 14 and the third manual two-way valve 15 are manually cut off, and the fourth manual two-way valve 16 is opened, so that heat exchanged by the refrigerant circulation control system in the air-cooling host 1 can directly enter the client-side air conditioner, secondary exchange of heat is avoided, and heat loss is reduced.
When the waterway circulation control system receives a starting signal, the air-conditioning pump 10 is started firstly, whether the air-conditioning pump 10 has faults is detected, if the air-conditioning pump 10 has faults, the air-cooling main machine is closed, if the air-cooling main machine 1 has faults, the time is delayed for 180 seconds, the air-cooling main machine 1 (namely, the refrigerant circulation control system) is started for heating, whether the air-conditioning pump 10 and the air-cooling main machine 1 have faults is detected in real time in operation, corresponding equipment is closed if the air-conditioning pump has faults, the relation between the temperature of an inlet and an outlet of an air conditioner and the set target temperature is detected in real time (T: the temperature of inlet and outlet water of the air conditioner, SP: the set target temperature, △ T: the temperature control range) is detected in real time, when the temperature of the air conditioner is less than the target set temperature, the refrigerant circulation control system keeps the maximum operation capacity, when the SP is less than or equal to T or equal to SP + △ T, the refrigerant circulation control system reduces the operation capacity between 100% and 50%, when the T is more than or equal to SP + △ T, the refrigerant circulation.
In addition, water paths in the ice storage system, the ice melting system and the refrigerating system are internal circulation, a water path in the heating system is external circulation, the first three control system circulating water are glycol solutions with the concentration not lower than 25%, when the heating mode is switched, the glycol solution in the air cooling main machine is emptied, after the heating mode is switched to the internal circulation mode, the specific gravity of the solution needs to be detected, and if the glycol concentration is lower than 25%, the glycol solution needs to be added, so that the phenomenon that the pressure of a refrigerant circulation control system is too low when the internal circulation system runs is avoided.
Preferably, a plate-exchange water inlet sensor 72 is arranged at the water inlet end of the plate heat exchanger 7, and a plate-exchange water outlet sensor 71 is arranged at the water outlet end of the heat exchanger, and is used for detecting circulating water at two ends of the plate heat exchanger.
Preferably, an air conditioner water inlet sensor 102 is arranged at an air conditioner water inlet end of the client side air conditioner, and an air conditioner water outlet sensor 101 is arranged at an air conditioner water outlet end of the client side air conditioner and is used for detecting circulating water at two ends of the client side air conditioner.
Preferably, a main engine water return sensor 121 is arranged at the air-cooling main engine water return port 12, and a main engine water outlet sensor 111 is arranged at the air-cooling main engine water outlet 11 and used for detecting circulating water in the refrigerant circulation control system.
It will be apparent to those skilled in the art that the controller, the temperature sensor, the liquid level sensor and the human-computer interface used in the present invention are not limited. The method is only required to detect accurate parameters of all parts in real time and control the start and stop actions of the corresponding water pumps, valves and other refrigerants and waterway systems timely and accurately through the controller.
In addition, the terms "first, second, third and fourth" in the present invention are used for descriptive purposes only, do not denote any order, are not to be construed as indicating or implying relative importance, and are to be construed as names.
The above embodiments are merely preferred embodiments of the present disclosure, which are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present disclosure, should be included in the scope of the present disclosure.
Claims (10)
1. A multipurpose energy-saving integrated machine for storing, melting ice and heating is characterized by comprising a waterway circulation control system, wherein an air cooling host is arranged in the waterway circulation control system, and a refrigerant circulation control system is arranged in the air cooling host;
the water path circulation control system comprises an ice storage system, an ice melting system and a refrigerating system, and the air cooling host is communicated with a client side air conditioner through a client side air conditioner pump to form a heating system;
the ice storage system comprises an air-cooled main machine, the air-cooled main machine is sequentially communicated with an ice storage electric valve, an ice storage groove, a water collector and an ice storage pump through an air-cooled main machine water outlet, and the ice storage pump is communicated with an air-cooled main machine water return port of the air-cooled main machine;
the ice melting system comprises an ice storage tank, a water collector, an ice melting pump and a plate heat exchanger which are sequentially communicated, wherein the plate heat exchanger is communicated with an ice storage tank water return port of the ice storage tank;
the refrigerating system comprises an air cooling main machine, a refrigerating electric valve, a plate type heat exchanger, a proportional electric valve, a water collector and an ice storage pump which are sequentially communicated, wherein the ice storage pump is communicated with a water return port of the air cooling main machine.
2. The multi-purpose energy-saving integrated machine for storing, melting ice and heating as claimed in claim 1, characterized in that:
and a liquid level sensor is arranged in the ice storage tank.
3. The multi-purpose energy-saving integrated machine for storing, melting ice and heating as claimed in claim 1, characterized in that:
and a stirring pump is arranged on one side of the ice storage tank.
4. The multi-purpose energy-saving integrated machine for storing, melting ice and heating as claimed in claim 1, characterized in that:
in the ice melting system, an ice storage tank water outlet and an ice storage tank water return port of the ice storage tank are respectively communicated with two ends of the proportional electric valve.
5. The multi-purpose energy-saving integrated machine for storing, melting ice and heating as claimed in claim 1, characterized in that:
in the heating system, a first manual two-way valve is arranged at a water outlet of the air-cooled host, a second manual two-way valve is arranged at a water return port of the air-cooled host, a water inlet of the client-side air conditioner is communicated between the first manual two-way valve and the air-cooled host, and a water outlet of the client-side air conditioner is communicated between the second manual two-way valve and the air-cooled host;
a third manual two-way valve is arranged between the client side air conditioner and the plate heat exchanger;
and a fourth manual two-way valve is arranged between the client side air conditioner and the air cooling host.
6. The integrated machine for storing, melting ice and heating as claimed in any one of claims 1 to 5, wherein:
a plate-changing water inlet sensor is arranged at a water inlet end of a heat exchanger of the plate heat exchanger, and a plate-changing water outlet sensor is arranged at a water outlet end of the heat exchanger of the plate heat exchanger.
7. The integrated machine for storing, melting ice and heating as claimed in any one of claims 1 to 5, wherein:
the air-cooled main engine water return port is provided with a main engine water return sensor, and the air-cooled main engine water outlet is provided with a main engine water outlet sensor.
8. The integrated machine for storing, melting ice and heating, and saving energy of claim 1 or 5, wherein:
an air conditioner water inlet end of the client side air conditioner is provided with an air conditioner water inlet sensor, and an air conditioner water outlet end of the client side air conditioner is provided with an air conditioner water outlet sensor.
9. The integrated machine for storing, melting ice and heating as claimed in any one of claims 1 to 4, wherein:
circulating water used in the ice storage system, the ice melting system and the refrigerating system is glycol solution with the concentration not lower than 25%.
10. The integrated machine for storing, melting ice and heating, and saving energy of claim 1 or 5, wherein:
the circulating water used in the heating system is purified water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921712370.2U CN210832636U (en) | 2019-10-14 | 2019-10-14 | Multi-purpose energy-saving integrated machine for ice storage, ice melting and heating |
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| CN201921712370.2U CN210832636U (en) | 2019-10-14 | 2019-10-14 | Multi-purpose energy-saving integrated machine for ice storage, ice melting and heating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567200A (en) * | 2019-10-14 | 2019-12-13 | 堃霖冷冻机械(上海)有限公司 | Multi-purpose energy-saving integrated machine for ice storage, ice melting and heating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567200A (en) * | 2019-10-14 | 2019-12-13 | 堃霖冷冻机械(上海)有限公司 | Multi-purpose energy-saving integrated machine for ice storage, ice melting and heating |
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