CN112208219B - Energy storage constant temperature water system suitable for high temperature high load thermal printer - Google Patents
Energy storage constant temperature water system suitable for high temperature high load thermal printer Download PDFInfo
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- CN112208219B CN112208219B CN202011019846.1A CN202011019846A CN112208219B CN 112208219 B CN112208219 B CN 112208219B CN 202011019846 A CN202011019846 A CN 202011019846A CN 112208219 B CN112208219 B CN 112208219B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/38—Preheating, i.e. heating to a temperature insufficient to cause printing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to an energy storage constant temperature water system suitable for a high-temperature high-load thermal printer, which comprises a constant temperature water loop for controlling the constant temperature of a thermal printing head and recycling waste heat generated during the operation of the thermal printing head, a refrigerant loop for controlling the temperature of the constant temperature water and ensuring the constant temperature of the constant temperature water, and an evaporator side chilled water loop for recycling the cold energy of the refrigerant or discharging the heat of the refrigerant. The invention recovers and utilizes a large amount of waste heat generated by the thermal printing head when the thermal printer works, and also recovers and utilizes the cold energy generated at the evaporator side when the constant-temperature water is heated, thereby reducing the total energy consumption of the thermal printer, improving the utilization rate of energy, improving the stability of the temperature of the constant-temperature water of the thermal printer, and ensuring that the thermal printer can work normally under the condition of continuous long-time operation.
Description
Technical Field
The invention relates to the technical field of thermal printing, in particular to an energy-storage constant-temperature water system suitable for a high-temperature high-load thermal printer.
Background
The thermal printer obtains wide application in the printing field by virtue of the characteristics of high speed, high efficiency and no pollution, the core technology of the thermal printer is a heating element, when the thermal printer starts to print, the thermal printing head needs to be heated to a higher temperature instantly, the thermal printing head is possibly damaged by overlarge heating intensity, in order to protect the thermal printing head with high price, the thermal printing head is usually preheated to a rated temperature by using constant-temperature water when the thermal printer is standby, and meanwhile, the thermal printing head starts to work at the same rated temperature every time, and the accuracy of temperature control of the thermal printer can also be improved. When the thermal printer works, waste heat is generated, so that the temperature of the thermal printing head rises, the printing effect is influenced by the overhigh temperature of the thermal printing head, and even the thermal printing head is possibly damaged, so that the thermal printer needs to be timely cooled.
The thermal printing head of the splicing type thermal printer is particularly expensive, once the temperature of the thermal printing head is too high or the instantaneous heating intensity is too high, the thermal printing head can be directly damaged to cause great loss, so that the heat storage during standby and the heat dissipation during working of the thermal printer are particularly important, and meanwhile, when the splicing type thermal printer works, particularly when high-speed color printing is carried out, a large amount of waste heat can be generated, and the part of waste heat is recycled, so that the important significance for improving the overall energy conservation of equipment is achieved.
In addition, the thermal printer may work continuously for a long time, for example, during an epidemic situation, the demand of the banner may rise rapidly, and even if some thermal printers used for producing banners work continuously for more than twenty-four hours, the printer may be in a high-temperature and high-load working state, and a large amount of waste heat may be generated during the working period, so that the thermal printer can be operated safely and normally under the extreme conditions, and the energy saving performance of the equipment is improved as much as possible.
The utility model discloses a utility model with publication number CN201420360784.4 discloses a constant temperature liquid circulation device for thermal printer can guarantee the printing device constancy of temperature, guarantees to print the effect, but the device does not retrieve the used heat that the thermal printer during operation produced, also does not have the cold volume recycle that the evaporimeter side produced when heating the constant temperature water, so the energy-conservation nature of the device is not good enough.
Therefore, designing a set of thermostatic water system with high energy-saving performance suitable for high-temperature high-load thermal printers becomes a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The applicant aims at the defects in the prior art and provides an energy-storage constant-temperature water system suitable for a high-temperature high-load thermal printer, which utilizes a heat accumulator to recycle waste heat generated during the operation of the thermal printer and utilizes a cold accumulator to recycle cold energy generated at the evaporator side during the preheating of the thermal printer, thereby solving the problem that the cold energy generated during the preheating of the high-temperature high-load thermal printer and the waste heat generated during the operation of the thermal printer cannot be fully utilized by using constant-temperature water.
The technical scheme adopted by the invention is as follows:
an energy storage constant temperature water system suitable for a high-temperature high-load thermal printer comprises a constant temperature water loop, a refrigerant loop and an evaporator side chilled water loop, wherein the three loops are mutually matched to form three working modes which are respectively suitable for standby, normal working and continuous long-time working states of the thermal printer;
the constant-temperature water loop comprises: preheating the thermal printing head at constant temperature in standby, cooling the thermal printing head in normal work and recycling waste heat in work; the refrigerant circuit: controlling the temperature of the constant-temperature water, heating the constant-temperature water in a standby state, heating the constant-temperature water in a normal working state, and cooling the constant-temperature water in a continuous long-time working state; the evaporator side chilled water loop: the cold energy of the refrigerant is recycled in standby and normal working, and the heat of the refrigerant is absorbed and discharged out of the system in continuous long-time working;
in the standby state of the thermal printer, the constant-temperature water loop heats the constant-temperature water passing through the thermal printing head by utilizing the heat stored by the heat accumulator when the thermal printer works and the heat released by the condenser when the refrigerant loop normally runs;
under the normal working state of the thermal printer, the constant-temperature water loop utilizes the cold energy which is stored by the cold accumulator in the chilled water loop at the evaporator side and is released by the evaporator when the refrigerant loop works normally to cool the constant-temperature water passing through the thermal printing head;
when the thermal printer works continuously for a long time, the refrigerant loop runs in the reverse direction, namely the heat pump system is changed into a refrigeration system, at the moment, the cold energy released by the condenser is used for cooling the constant-temperature water passing through the thermal printing head, and meanwhile, an external cold water system is used for cooling the circulating chilled water at the evaporator side.
The specific structure of the constant-temperature water loop comprises: the constant-temperature water output end of the thermal printer is connected with the constant-temperature water input end of the heat accumulator, the constant-temperature water output end of the heat accumulator is provided with a first branch pipe and a second branch pipe which are connected in parallel, the first branch pipe is directly connected with the water side input end of the condenser, the second branch pipe is connected with the water side input port of the cold accumulator, the water side output port of the cold accumulator is connected with the water side input end of the condenser, and the water side output end of the condenser is connected with the constant-temperature water input end of the thermal printer to form a loop;
the evaporator side chilled water loop comprises the following specific structures: the system comprises an evaporator and a cold accumulator used in the constant-temperature water loop, wherein a refrigerating fluid output end of the cold accumulator is connected with a refrigerating water input end of the evaporator through an output end header pipe; the chilled water output end of the evaporator is provided with a third branch pipe and a fourth branch pipe which are connected in parallel, the third branch pipe is connected with the chilled liquid input end of the cold accumulator, and the fourth branch pipe is connected with the output end header pipe; the output end header pipe is provided with a port connected with a cold water inlet and a cold water outlet of an external cold water system;
the specific structure of the refrigerant circuit comprises: the evaporator is arranged in the chilled water loop at the evaporator side, the refrigerant output end of the condenser is connected with the refrigerant input port of the evaporator, the refrigerant output port of the evaporator is connected with the input end of the compressor through the electromagnetic four-way reversing valve, and the compressor output end is connected with the refrigerant input end of the condenser through the electromagnetic four-way reversing valve.
The second branch pipe is connected with a second electromagnetic valve, and the first branch pipe is connected with a first electromagnetic valve and a first water pump; and a water side output port of the cold accumulator is connected with a water side input end of the condenser through the first water pump.
The third branch pipe is connected with a third electromagnetic valve, and the fourth branch pipe is connected with a fourth electromagnetic valve; the output end header pipe is also connected with a fifth branch pipe and a sixth branch pipe, the fifth branch pipe is connected with a cold water inlet of an external cold water system, and the sixth branch pipe is connected with a cold water outlet of the external cold water system.
And a fifth electromagnetic valve is connected to the fifth branch pipe, a sixth electromagnetic valve is connected to the sixth branch pipe, and a second water pump is connected to one end, close to the chilled water input end, of the output end header pipe.
Further, the energy storage constant temperature water system has three working modes, and is respectively suitable for three states of the thermal printer:
in the standby state of the thermal printer: the refrigerant loop normally operates (a heat pump system), constant-temperature water forms a circulation loop among the thermal printer, the heat accumulator and the condenser, and the condenser in the normal operation state of the heat accumulator and the refrigerant loop provides heat for the constant-temperature water, so that the constant-temperature water input to the thermal printer by the condenser reaches the rated temperature;
under the normal working state of the thermal printer: the method comprises the following steps that a refrigerant loop normally runs (a heat pump system), but the flow rate of the refrigerant in the refrigerant loop is reduced, if the temperature of constant-temperature water at the constant-temperature water output end of a heat accumulator is higher than the rated temperature of the constant-temperature water, the constant-temperature water is led to a cold accumulator for further cooling, namely the constant-temperature water forms a circulating loop among a thermal printer, the heat accumulator, the cold accumulator and a condenser, the heat storage material of the heat accumulator continuously absorbs the heat of the constant-temperature water, and the chilled water at the evaporator side continuously flows through the cold accumulator and stores the cold energy in the cold accumulator;
the thermal printer is in a long-time continuous working state: if the temperature of the constant temperature water at the water side output port of the cold accumulator is higher than the rated temperature of the constant temperature water, the refrigerant loop reversely runs (a refrigeration system), so that the low-pressure refrigerant flows through the condenser, the constant temperature water is continuously cooled to the rated temperature of the constant temperature water by the refrigerant, meanwhile, the chilled water at the evaporator side does not flow through the cold accumulator any more, and the filtered cold water accessed from the outside takes away the redundant heat.
When the thermal printer is in standby and normal operation, the refrigerant loop is a heat pump system, and the constant-temperature water obtains heat from the condenser; when the thermal printer works continuously for a long time, the refrigerant loop becomes a refrigerating system, namely, the constant-temperature water obtains cold from the condenser.
Specifically, the working principle and process under three working states are as follows:
in the standby state of the thermal printer, the constant-temperature water loop of the thermal printer starts the first branch pipe and closes the second branch pipe, the chilled water loop at the evaporator side starts the third branch pipe and closes the fourth branch pipe, the heat accumulator releases the stored heat to the constant-temperature water, and the cold accumulator continuously stores the cold energy in the chilled water at the evaporator side.
When the thermal printer normally works, if the temperature of the constant-temperature water at the output end of the heat accumulator is not higher than the rated temperature of the constant-temperature water, the constant-temperature water loop still opens the first branch pipe and closes the second branch pipe, the flow of the refrigerant in the refrigerant loop is reduced, the chilled water loop at the evaporator side opens the third branch pipe and closes the fourth branch pipe, and the chilled water at the evaporator side circulates between the evaporator and the cold accumulator: the chilled water output end of the evaporator is connected to the cold accumulator through a third branch pipe and then is conveyed to the chilled water input end of the evaporator through an output end header pipe; if the temperature of the constant-temperature water at the output end of the heat accumulator is higher than the rated temperature of the constant-temperature water, the constant-temperature water loop opens the second branch pipe and closes the first branch pipe, the flow of the refrigerant in the refrigerant loop is further reduced, the cold accumulator continuously stores the cold energy of the chilled water at the evaporator side, and the stored cold energy is used for cooling the constant-temperature water. The first interface and the second interface of the electromagnetic four-way reversing valve are communicated, the third interface and the fourth interface are communicated, and the medium running direction in the refrigerant loop is the same as the direction in the conventional refrigeration process: the refrigerant output port of the evaporator is connected with the first interface of the electromagnetic four-way reversing valve, the second interface of the electromagnetic four-way reversing valve is connected with the input end of the compressor, the output end of the compressor is connected with the third interface of the electromagnetic four-way reversing valve, and the fourth interface of the electromagnetic four-way reversing valve is connected with the refrigerant input end of the condenser.
When the temperature of water at the water side output port of the cold accumulator is higher than the rated temperature of constant-temperature water under the continuous long-time working state of the thermal printer, the first interface and the third interface of the electromagnetic four-way reversing valve are communicated, and the second interface and the fourth interface are communicated; the direction of the medium in the refrigerant circuit is opposite to that in the conventional refrigeration: the refrigerant is input from the refrigerant output port of the evaporator and output from the refrigerant input port, the refrigerant is input from the refrigerant output end of the condenser and output from the refrigerant input end, so that the low-pressure refrigerant flows through the condenser, the high-pressure refrigerant flows through the refrigerant input port of the evaporator and the refrigerant output end of the expansion valve to flow through the condenser to cool the constant-temperature water, and the constant temperature of the constant-temperature water is ensured. The constant-temperature water circuit opens the second branch pipe and closes the first branch pipe, the refrigerant circuit utilizes the electromagnetic four-way reversing valve to enable low-pressure refrigerant to flow through the condenser, high-pressure refrigerant flows through the evaporator, the refrigerant flow changes along with the change of the cold load at the condenser side, the chilled water circuit at the evaporator side opens the fourth branch pipe to close the third branch pipe and accesses cold water of an external cold water system; the cold volume of deposit is not enough to cool off the constant temperature water to the rated temperature of constant temperature water in the regenerator, and the refrigerated water of evaporimeter side does not flow through the regenerator: the fourth branch pipe is directly connected to the output end main pipe, so that the chilled water at the evaporator side is mixed with cold water provided by an external cold water system and then is cooled.
The invention has the following beneficial effects:
the switching of the operation modes of the system under three conditions of standby of the thermal printer, working of the thermal printer and continuous long-time working of the thermal printer (when the temperature of constant-temperature water at the water side output port of the regenerator is higher than the rated temperature of the constant-temperature water) is realized through the opening and closing of each electromagnetic valve and the passage switching of the electromagnetic four-way reversing valve; the heat accumulator and the cold accumulator are used, so that the problem that the cold quantity generated when constant-temperature water is used for preheating the high-temperature high-load thermal printer and the waste heat generated when the thermal printer works cannot be fully utilized is solved, the energy utilization rate of a system is improved, the stability of the temperature of the constant-temperature water is also improved, and convenience is brought to thermal control of the thermal printer.
The method has the following specific advantages:
1. the waste heat generated during the operation of the thermal printer is recovered and utilized: the heat accumulator is used for absorbing and storing waste heat generated when the printer head works and releasing stored heat when the thermal printer is standby; when the thermal printer works, if the temperature of the constant-temperature water at the output end of the heat accumulator is not higher than the rated temperature of the constant-temperature water, the constant-temperature water loop still does not pass through the cold accumulator in a standby state, the flow of the refrigerant in the refrigerant loop is reduced to reduce the heat release of the condenser to the constant-temperature water, the heat accumulator continuously absorbs and stores waste heat generated when the thermal printer works, the cold accumulator continuously stores cold energy generated at the evaporator side, if the temperature of the constant-temperature water at the output end of the heat accumulator is higher than the rated temperature of the constant-temperature water, the constant-temperature water loop passes through the cold accumulator, the flow of the refrigerant in the refrigerant loop is further reduced, the cold accumulator continuously stores cold energy of chilled water at the evaporator side, and the stored cold energy is used for cooling the constant-temperature water. Therefore, the waste heat of the thermal printer is recycled, and the stability of the temperature of the constant-temperature water is improved.
2. The cold quantity of the chilled water on the evaporator side is recovered and utilized when the system heats the constant-temperature water: the cold storage device is used for storing the cold energy of the chilled water on the evaporator side when the refrigerant loop normally operates, and the stored cold energy is used for cooling the constant temperature water after the temperature of the constant temperature water at the output end of the heat storage device is higher than the rated temperature of the constant temperature water when the thermal printer works: under the continuous long-time working state of the thermal printer, the cold energy stored in the cold accumulator is not enough to cool the constant-temperature water to the rated temperature of the constant-temperature water, the refrigerant loop runs reversely, the refrigerant is used for cooling the constant-temperature water, the filtered tap water is accessed from the outside to take away redundant heat, the cold water of an external cold water system is used for cooling the chilled water at the evaporator side, the cold water after heat exchange is discharged out of the system and can be used as production and living water, and the utilization rate of resource and energy is improved. Therefore, the total energy consumption of the thermal printer is reduced, and the thermal printer can work normally under the condition of continuous long-time operation.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein: 1. a thermal printer; 2. a heat accumulator; 3. a first solenoid valve; 4. a second solenoid valve; 5. a regenerator; 5a, a refrigerating fluid input end; 5b, a refrigerating fluid output end; 5c, a water side output port; 5d, a water side input port; 6. a first water pump; 7. a condenser; 7a, a refrigerant output end; 7b, a refrigerant input end; 7c, a water side output end; 7d, a water side input end; 8. a compressor; 9. an electromagnetic four-way reversing valve; 9a, a first interface; 9b, a second interface; 9c, a third interface; 9d, a fourth interface; 10. an evaporator; 10a, a chilled water input end; 10b, a chilled water output end; 10c, a refrigerant input port; 10d, a refrigerant outlet; 11. an expansion valve; 12. a third electromagnetic valve; 13. a fourth solenoid valve; 14. a second water pump; 15. a fifth solenoid valve; 16. a sixth electromagnetic valve; 17. a second branch pipe; 18. a first branch pipe; 19. a fifth branch pipe; 20. a sixth branch pipe; 22. an output end header pipe; 23. a third branch pipe; 24. a fourth branch pipe.
Detailed Description
As shown in fig. 1, the energy storage constant temperature water system suitable for the high-temperature high-load thermal printer of the embodiment includes a constant temperature water circuit, a refrigerant circuit and an evaporator side chilled water circuit, and the three circuits are mutually matched to form three working modes, which are respectively suitable for standby, normal working and continuous long-time working states of the thermal printer 1;
the constant-temperature water loop comprises: preheating the thermal printing head at constant temperature in standby, cooling the thermal printing head in normal work and recycling waste heat in work; the refrigerant circuit: controlling the temperature of the constant-temperature water, heating the constant-temperature water in a standby state, heating the constant-temperature water in a normal working state, and cooling the constant-temperature water in a continuous long-time working state; the evaporator side chilled water loop: the cold energy of the refrigerant is recycled in standby and normal working, and the heat of the refrigerant is absorbed and discharged out of the system in continuous long-time working;
in the standby state of the thermal printer 1, the constant-temperature water loop heats the constant-temperature water passing through the thermal printing head by utilizing the heat stored by the heat accumulator 2 when the thermal printer 1 works and the heat released by the condenser 7 when the refrigerant loop normally runs;
in the normal working state of the thermal printer 1, the constant-temperature water loop utilizes the cold energy which is stored by the cold accumulator 5 in the chilled water loop at the evaporator side and is released by the evaporator 10 when the refrigerant loop works in the normal operation of the refrigerant loop to cool the constant-temperature water passing through the thermal printing head;
when the thermal printer 1 is continuously operated for a long time, the refrigerant circuit runs in the reverse direction, namely the heat pump system is changed into a refrigeration system, at the moment, the cold energy released by the condenser 7 is used for cooling the constant temperature water passing through the thermal printing head, and meanwhile, an external cold water system is used for cooling the circulating chilled water at the evaporator 10 side.
The specific structure of the constant-temperature water loop comprises: the constant-temperature water cooling system comprises a thermal printer 1, a heat accumulator 2, a cold accumulator 5 and a condenser 7, wherein a constant-temperature water output end of the thermal printer 1 is connected with a constant-temperature water input end of the heat accumulator 2, a constant-temperature water output end of the heat accumulator 2 is provided with a first branch pipe 18 and a second branch pipe 17 which are connected in parallel, the first branch pipe 18 is directly connected with a water side input end 7d of the condenser 7, the second branch pipe 17 is connected with a water side input port 5d of the cold accumulator 5, a water side output port 5c of the cold accumulator 5 is connected with a water side input end 7d of the condenser 7, and a water side output end 7c of the condenser 7 is connected with the constant-temperature water input end of the thermal printer 1 to form a loop;
the second branch pipe 17 is connected with a second electromagnetic valve 4, and the first branch pipe 18 is connected with a first electromagnetic valve 3 and a first water pump 6; a water-side output port 5c of the cold accumulator 5 is connected to a water-side input port 7d of the condenser 7 via a first water pump 6.
The evaporator side chilled water loop comprises the following specific structures: the device comprises an evaporator 10 and a cold accumulator 5 used in a constant temperature water loop, wherein a refrigerating fluid output end 5b of the cold accumulator 5 is connected with a refrigerating water input end 10a of the evaporator 10 through an output end header pipe 22; the chilled water output end 10b of the evaporator 10 is provided with a third branch pipe 23 and a fourth branch pipe 24 which are connected in parallel, the third branch pipe 23 is connected with the chilled liquid input end 5a of the cold accumulator 5, and the fourth branch pipe 24 is connected with the output end header pipe 22; the output end header pipe 22 is provided with a port connected with a cold water inlet and a cold water outlet of an external cold water system;
the third branch pipe 23 is connected with a third electromagnetic valve 12, and the fourth branch pipe 24 is connected with a fourth electromagnetic valve 13; the output end manifold 22 is also connected with a fifth branch pipe 19 and a sixth branch pipe 20, the fifth branch pipe 19 is connected with a cold water inlet of an external cold water system, and the sixth branch pipe 20 is connected with a cold water outlet of the external cold water system.
The fifth branch pipe 19 is connected with a fifth electromagnetic valve 15, the sixth branch pipe 20 is connected with a sixth electromagnetic valve 16, and one end of the output end manifold 22 close to the chilled water input end 10a is connected with a second water pump 14.
The specific structure of the refrigerant circuit comprises: the constant-temperature water circulation system comprises a condenser 7 used in a constant-temperature water loop, a compressor 8, an electromagnetic four-way reversing valve 9, an evaporator 10 used in an evaporator side chilled water loop and an expansion valve 11, wherein a refrigerant output end 7a of the condenser 7 is connected with a refrigerant input port 10c of the evaporator 10 through the expansion valve 11, a refrigerant output port 10d of the evaporator 10 is connected with an input end of the compressor 8 through the electromagnetic four-way reversing valve 9, and an output end of the compressor 8 is connected with a refrigerant input end 7b of the condenser 7 through the electromagnetic four-way reversing valve 9.
The working process of the energy storage constant temperature water system suitable for the high-temperature high-load thermal printer is as follows:
1) in the standby state of the thermal printer 1:
the constant temperature water loop opens the first electromagnetic valve 3 and closes the second electromagnetic valve 4, the evaporator side chilled water loop opens the third electromagnetic valve 12 and closes the fourth electromagnetic valve 13, the fifth electromagnetic valve 15 and the sixth electromagnetic valve 16, at this time, the heat accumulator 2 releases the stored heat to the constant temperature water, and the cold accumulator 5 continuously stores the cold energy in the chilled water at the evaporator 10 side.
2) In the normal operating state of the thermal printer 1:
a first port 9a of the electromagnetic four-way reversing valve 9 is communicated with a second port 9b, and a third port 9c is communicated with a fourth port 9 d; the running direction of the medium in the refrigerant loop is the same as that in the conventional refrigeration: a refrigerant output port 10d of the evaporator 10 is connected with a first interface 9a of the electromagnetic four-way reversing valve 9, a second interface 9b of the electromagnetic four-way reversing valve 9 is connected with an input end of the compressor 8, an output end of the compressor 8 is connected with a third interface 9c of the electromagnetic four-way reversing valve 9, and a fourth interface 9d of the electromagnetic four-way reversing valve 9 is connected with a refrigerant input end 7b of the condenser 7;
if the temperature of the constant-temperature water at the output end of the heat accumulator 2 is not higher than the rated temperature of the constant-temperature water, the constant-temperature water loop still opens the first electromagnetic valve 3 and closes the second electromagnetic valve 4, the flow of the refrigerant in the refrigerant loop is reduced, the chilled water loop at the evaporator side opens the third electromagnetic valve 12 and closes the fourth electromagnetic valve 13, the fifth electromagnetic valve 15 and the sixth electromagnetic valve 16, and the chilled water at the evaporator 10 side circulates between the evaporator 10 and the cold accumulator 5: the chilled water output end 10b of the evaporator 10 is connected to the cold accumulator 5 through the third branch pipe 23, and then is delivered to the chilled water input end 10a of the evaporator 10 through the output end header pipe 22. At the moment, the heat accumulator 2 continuously absorbs and stores waste heat generated when the thermal printer 1 works, and the cold accumulator 5 continuously stores cold energy generated at the evaporator 10 side;
if the temperature of the constant-temperature water at the output end of the heat accumulator 2 is higher than the rated temperature of the constant-temperature water, the constant-temperature water loop of the thermal printer opens the second electromagnetic valve 4 and closes the first electromagnetic valve 3, the flow of the refrigerant in the refrigerant loop is further reduced, the chilled water loop at the evaporator side opens the third electromagnetic valve 12 and closes the fourth electromagnetic valve 13, the fifth electromagnetic valve 15 and the sixth electromagnetic valve 16, the cold accumulator 5 continuously stores the cold energy of the chilled water at the evaporator 10 side, and the stored cold energy is used for cooling the constant-temperature water.
3) The thermal printer 1 is in a continuous long-time working state:
when the system works until the water temperature of a water side output port 5c of the cold accumulator 5 is higher than the rated temperature of constant temperature water, the constant temperature water loop of the thermal printer opens the second electromagnetic valve 4 and closes the first electromagnetic valve 3, the refrigerant loop enables low-pressure refrigerant to flow through the condenser 7 by using the electromagnetic four-way reversing valve 9, high-pressure refrigerant flows through the evaporator 10, the refrigerant flow changes along with the change of the cold load of the condenser side, the refrigerant loop enables the low-pressure refrigerant to flow through the condenser 7 by using the electromagnetic four-way reversing valve 9, and the process that the high-pressure refrigerant flows through the evaporator 10 specifically comprises the following steps: a first port 9a of the electromagnetic four-way reversing valve 9 is communicated with a third port 9c, and a second port 9b is communicated with a fourth port 9 d; the direction of the medium in the refrigerant circuit is opposite to that in the conventional refrigeration: the refrigerant is input from the refrigerant output port 10d of the evaporator 10 and output from the refrigerant input port 10c, the refrigerant is input from the refrigerant output port 7a of the condenser 7 and output from the refrigerant input port 7b, so that the low-pressure refrigerant flows through the condenser 7, the high-pressure refrigerant flows through the refrigerant input port 10c of the evaporator 10 and flows through the condenser 7 from the refrigerant output port 7a via the expansion valve 11, and the constant temperature water is cooled, thereby ensuring the constant temperature of the constant temperature water.
The chilled water loop on the evaporator side opens the fourth electromagnetic valve 13, the fifth electromagnetic valve 15 and the sixth electromagnetic valve 16 and closes the third electromagnetic valve 12, the cold energy stored in the cold accumulator 5 is not enough to cool the constant temperature water to the rated temperature of the constant temperature water, the constant temperature water is started to be cooled by using the refrigerant, and filtered tap water (as shown in a cold water outlet and a cold water inlet in fig. 1) is connected from the outside to take away redundant heat.
The cooling water on the evaporator 10 side is discharged after being mixed by tap water (cold water) which is externally connected and filtered so as to take away surplus waste heat, and considering that the extreme condition is rarely occurred, the cooling water is not provided with a heat exchanger, but the chilled water at the outlet of the chilled water output end 10b is directly mixed with the filtered cold water which is externally connected, and part of water after mixed heat exchange is discharged outside the system to be used as production and domestic water. The chilled water on the evaporator 10 side of the present embodiment may also be heat exchanged with external cold water using a heat exchanger device, where conditions permit.
Claims (10)
1. An energy storage constant temperature water system suitable for a high-temperature high-load thermal printer is characterized by comprising a constant temperature water loop, a refrigerant loop and an evaporator side chilled water loop, wherein the three loops are mutually matched to form three working modes which are respectively suitable for standby, normal working and continuous long-time working states of the thermal printer (1);
the constant-temperature water loop comprises: preheating the thermal printing head at constant temperature in standby, cooling the thermal printing head in normal work and recycling waste heat in work; the refrigerant circuit: controlling the temperature of the constant-temperature water, heating the constant-temperature water in a standby state, heating the constant-temperature water in a normal working state, and cooling the constant-temperature water in a continuous long-time working state; the evaporator side chilled water loop: the cold energy of the refrigerant is recycled in standby and normal working, and the heat of the refrigerant is absorbed and discharged out of the system in continuous long-time working;
in the standby state of the thermal printer (1), the constant-temperature water loop heats the constant-temperature water passing through the thermal printing head by using the heat stored by the heat accumulator (2) in the loop when the thermal printer (1) works and the heat released by the condenser (7) when the refrigerant loop normally runs, and the condenser (7) is simultaneously positioned in the refrigerant loop and the constant-temperature water loop;
under the normal working state of the thermal printer (1), the constant-temperature water loop utilizes the cold energy released by the evaporator (10) when the refrigerant loop works and stored by the cold accumulator (5) in the chilled water loop at the evaporator side when the refrigerant loop normally runs to cool the constant-temperature water passing through the thermal printing head;
when the thermal printer (1) is in a long-time continuous working state, the refrigerant loop runs in the reverse direction, namely the heat pump system is changed into a refrigerating system, at the moment, the cold energy released by the condenser (7) is used for cooling the constant-temperature water passing through the thermal printing head, and meanwhile, an external cold water system is used for cooling the circulating chilled water at the evaporator (10) side.
2. The energy-storing constant-temperature water system suitable for the high-temperature high-load thermal printer according to claim 1,
the specific structure of the constant-temperature water loop comprises: the constant-temperature water heat accumulator comprises a thermal printer (1), a heat accumulator (2), a cold accumulator (5) and a condenser (7), wherein a constant-temperature water output end of the thermal printer (1) is connected with a constant-temperature water input end of the heat accumulator (2), a constant-temperature water output end of the heat accumulator (2) is provided with a first branch pipe (18) and a second branch pipe (17) which are connected in parallel, the first branch pipe (18) is directly connected with a water side input end (7d) of the condenser (7), the second branch pipe (17) is connected with a water side input port (5d) of the cold accumulator (5), a water side output port (5c) of the cold accumulator (5) is connected with a water side input end (7d) of the condenser (7), and a water side output end (7c) of the condenser (7) is connected with the constant-temperature water input end of the thermal printer (1) to form a loop;
the evaporator side chilled water loop comprises the following specific structures: the constant-temperature water circuit comprises an evaporator (10) and a cold accumulator (5) used in the constant-temperature water circuit, wherein a refrigerating fluid output end (5b) of the cold accumulator (5) is connected with a refrigerating water input end (10a) of the evaporator (10) through an output end header pipe (22); a chilled water output end (10b) of the evaporator (10) is provided with a third branch pipe (23) and a fourth branch pipe (24) which are connected in parallel, the third branch pipe (23) is connected with a chilled liquid input end (5a) of the cold accumulator (5), and the fourth branch pipe (24) is connected with the output end header pipe (22); the output end header pipe (22) is provided with a port connected with a cold water inlet and a cold water outlet of an external cold water system;
the specific structure of the refrigerant circuit comprises: be used for condenser (7), compressor (8), electromagnetism four-way reversing valve (9), be used for in the constant temperature water return circuit evaporimeter (10) in the evaporimeter side refrigerated water return circuit to and expansion valve (11), refrigerant output (7a) of condenser (7) passes through expansion valve (11) with refrigerant input port (10c) of evaporimeter (10) are connected, refrigerant delivery outlet (10d) of evaporimeter (10) pass through electromagnetism four-way reversing valve (9) with the input of compressor (8) is connected, and compressor (8) output passes through electromagnetism four-way reversing valve (9) and is connected with refrigerant input (7b) of condenser (7).
3. The energy-storage constant-temperature water system suitable for the high-temperature high-load thermal printer is characterized in that a second electromagnetic valve (4) is connected to the second branch pipe (17), and a first electromagnetic valve (3) and a first water pump (6) are connected to the first branch pipe (18); and a water side output port (5c) of the cold accumulator (5) is connected with a water side input end (7d) of the condenser (7) through the first water pump (6).
4. The energy-storage constant-temperature water system suitable for the high-temperature high-load thermal printer as claimed in claim 2, wherein a third electromagnetic valve (12) is connected to the third branch pipe (23), and a fourth electromagnetic valve (13) is connected to the fourth branch pipe (24); the output end header pipe (22) is also connected with a fifth branch pipe (19) and a sixth branch pipe (20), the fifth branch pipe (19) is connected with a cold water inlet of an external cold water system, and the sixth branch pipe (20) is connected with a cold water outlet of the external cold water system.
5. The energy-storage constant-temperature water system suitable for the high-temperature high-load thermal printer as claimed in claim 4, wherein a fifth solenoid valve (15) is connected to the fifth branch pipe (19), a sixth solenoid valve (16) is connected to the sixth branch pipe (20), and a second water pump (14) is connected to one end, close to the chilled water input end (10a), of the output end header pipe (22).
6. The energy storage constant temperature water system suitable for the high-temperature high-load thermal printer according to claim 2, wherein in a standby state of the thermal printer (1), the constant temperature water circuit opens the first branch pipe (18) and closes the second branch pipe (17), the evaporator side chilled water circuit opens the third branch pipe (23), closes the fourth branch pipe (24), the heat accumulator (2) releases the stored heat to the constant temperature water, and the cold accumulator (5) continuously stores the cold energy in the chilled water at the evaporator (10) side.
7. The energy-storage constant-temperature water system suitable for the high-temperature high-load thermal printer as claimed in claim 2, wherein when the thermal printer (1) normally works, if the temperature of the constant-temperature water at the output end of the heat accumulator (2) is not higher than the rated temperature of the constant-temperature water, the constant-temperature water circuit still opens the first branch pipe (18) and closes the second branch pipe (17), the flow rate of the refrigerant in the refrigerant circuit is reduced, the evaporator side chilled water circuit opens the third branch pipe (23) and closes the fourth branch pipe (24), and the chilled water at the evaporator (10) side circulates between the evaporator (10) and the cold accumulator (5): the chilled water output end (10b) of the evaporator (10) is connected to the cold accumulator (5) through a third branch pipe (23) and then is conveyed to the chilled water input end (10a) of the evaporator (10) through an output end header pipe (22); if the temperature of the constant-temperature water at the output end of the heat accumulator (2) is higher than the rated temperature of the constant-temperature water, the constant-temperature water loop opens the second branch pipe (17) and closes the first branch pipe (18), the flow of the refrigerant in the refrigerant loop is further reduced, the heat accumulator (2) can not store more heat, the cold accumulator (5) continuously stores the cold energy of the chilled water at the evaporator (10) side, and the stored cold energy is used for cooling the constant-temperature water.
8. The energy-storing constant-temperature water system suitable for the high-temperature high-load thermal printer as claimed in claim 7, wherein the first port (9a) of the electromagnetic four-way reversing valve (9) is communicated with the second port (9b), and the third port (9c) is communicated with the fourth port (9 d); the running direction of the medium in the refrigerant loop is the same as that in the conventional refrigeration: the refrigerant output port (10d) of the evaporator (10) is connected with the first interface (9a) of the electromagnetic four-way reversing valve (9), the second interface (9b) of the electromagnetic four-way reversing valve (9) is connected with the input end of the compressor (8), the output end of the compressor (8) is connected with the third interface (9c) of the electromagnetic four-way reversing valve (9), and the fourth interface (9d) of the electromagnetic four-way reversing valve (9) is connected with the refrigerant input end (7b) of the condenser (7).
9. The energy-storage constant-temperature water system suitable for the high-temperature high-load thermal printer as claimed in claim 2, wherein under the continuous long-time working state of the thermal printer (1), when the water temperature to the water side output port (5c) of the regenerator (5) is higher than the rated temperature of constant-temperature water, the first interface (9a) of the electromagnetic four-way reversing valve (9) is communicated with the third interface (9c), and the second interface (9b) is communicated with the fourth interface (9 d); the direction of the medium in the refrigerant circuit is opposite to that in the conventional refrigeration: the refrigerant is input from a refrigerant output port (10d) of the evaporator (10) and output from a refrigerant input port (10c), the refrigerant is input from a refrigerant output port (7a) of the condenser (7) and output from a refrigerant input port (7b), so that the low-pressure refrigerant flows through the condenser (7), the high-pressure refrigerant flows through the refrigerant input port (10c) of the evaporator (10) and flows through the condenser (7) from the refrigerant output port (7a) through the expansion valve (11) to cool the constant-temperature water, and the constant-temperature water is ensured to have constant temperature.
10. The energy-storage constant-temperature water system suitable for the high-temperature high-load thermal printer is characterized in that a constant-temperature water circuit opens a second branch pipe (17) and closes a first branch pipe (18), a refrigerant circuit enables low-pressure refrigerant to flow through a condenser (7) by using an electromagnetic four-way reversing valve (9), high-pressure refrigerant flows through an evaporator (10), the refrigerant flow rate changes along with the change of a cold load on the condenser side, a chilled water circuit on the evaporator side opens a fourth branch pipe (24) to close a third branch pipe (23) and cold water of an external cold water system is accessed; the heat accumulator (2) cannot store more heat, the cold stored in the cold storage device (5) is not enough to cool the constant-temperature water to the rated temperature of the constant-temperature water, and the chilled water on the evaporator (10) side does not flow through the cold storage device (5): the refrigerant is directly connected to the output end main pipe (22) through the fourth branch pipe (24), so that the chilled water on the evaporator (10) side is mixed with cold water provided by an external cold water system and then cooled.
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