CN112665213A - Integrated cold station system and control method and device thereof - Google Patents
Integrated cold station system and control method and device thereof Download PDFInfo
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- CN112665213A CN112665213A CN202011393688.6A CN202011393688A CN112665213A CN 112665213 A CN112665213 A CN 112665213A CN 202011393688 A CN202011393688 A CN 202011393688A CN 112665213 A CN112665213 A CN 112665213A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 406
- 239000000498 cooling water Substances 0.000 claims abstract description 115
- 238000007710 freezing Methods 0.000 claims abstract description 99
- 230000008014 freezing Effects 0.000 claims abstract description 99
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims description 34
- 238000005057 refrigeration Methods 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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Abstract
The invention relates to an integrated cold station system and a control method and a device thereof, wherein the integrated cold station system comprises: the system comprises a container, a controller, a refrigerating unit, a heating unit, a temperature detection assembly, a first valve, a chilled water pipeline, a cooling water pipeline and a hot water pipeline; the heating unit includes: the system comprises a heat pump unit, a water tank and a hot water pump; the controller determines a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature detected by the temperature detection assembly in real time, and when the to-be-operated mode is a dual-machine mode, the controller controls the heat pump unit and the refrigerating unit to operate synchronously, controls the hot water pump to be started, and adjusts the first valve to the maximum opening degree, so that the heat pump unit performs heat exchange on hot water and cooling water, absorbs the heat of the cooling water, and dissipates heat to the hot water. By adopting the technical scheme of the invention, the heat pump unit directly uses the heat of the cooling water to dissipate heat to the hot water, thereby reducing energy waste and reducing the energy consumption of the integrated cold station.
Description
Technical Field
The invention relates to the technical field of integrated cold station control, in particular to an integrated cold station system and a control method and device thereof.
Background
At present, in an integrated cold station used in places such as hotels, supermarkets and the like in service industries, a container scheme is adopted to integrate a water chilling unit, a water pump and a cooling tower into a whole because a user side needs to use cold water and hot water at the same time; the heat pump units mostly adopt a unit, a water pump and a fan, and the unit is used for refrigerating (heating) the air and supplying the air to a user side.
The cold water unit and the hot water unit in the existing integrated cold station can exchange heat with air in the working process, but the energy after exchanging heat with the air can only be discharged to the external environment, so that energy waste is caused, and the energy consumption of the integrated cold station is improved. For example, in the cooling mode, the temperature of the cooling inlet water in the condenser of the water chilling unit is about 30 ℃, the temperature of the cooling outlet water is about 35 ℃ after heat exchange with the refrigerant in the unit, and the heat is dissipated through the cooling tower and discharged to the outside air.
Therefore, how to reduce the energy waste of the water chilling unit and the hot water unit in the integrated cold station in the working process and reduce the energy consumption of the integrated cold station is a technical problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides an integrated cold station system, and a control method and device thereof, to solve the problems that energy generated by heat exchange between a water chilling unit and a water heating unit in an integrated cold station in the prior art and air can only be discharged to the external environment during the working process, which causes energy waste and increases energy consumption of the integrated cold station.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated cold station system comprising: the container, and a controller, a refrigerating unit, a heating unit, a temperature detection assembly, a first valve, a freezing water pipeline, a cooling water pipeline and a hot water pipeline which are arranged in the container;
the heating unit includes: the system comprises a heat pump unit, a water tank and a hot water pump;
the refrigerating unit transmits chilled water with a user end through the chilled water pipeline and transmits cooling water with the heat pump unit through the cooling water pipeline;
the water tank is in hot water transmission with the heat pump unit through the hot water pipeline; the hot water pump is arranged on the hot water pipeline; the first valve is arranged on the cooling water pipeline;
the refrigerating unit, the hot water pump, the heat pump unit and the first valve are respectively electrically connected with the controller;
the temperature detection assembly is used for detecting the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature in real time;
the controller is used for determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature, controlling the heat pump unit and the refrigerating unit to synchronously operate when the to-be-operated mode is a double-unit mode, controlling the hot water pump and the first valve to be opened, and adjusting the first valve to the maximum opening degree so that the heat pump unit exchanges heat with the hot water and the cooling water to absorb the heat of the cooling water and radiate the hot water.
Further, in the integrated cold station system, the heat pump unit includes: the evaporator side refrigerant, the condenser side refrigerant, the compressor and the second valve;
the compressor and the second valve are respectively electrically connected with the controller;
the evaporator side refrigerant is used for absorbing the heat of the cooling water so as to reduce the temperature of the cooling water;
the compressor is used for compressing the refrigerant at the evaporator side absorbing the heat of the cooling water so as to radiate the heat to the refrigerant at the condenser side;
the condenser side refrigerant is used for radiating heat to the hot water so as to raise the temperature of the hot water.
Further, in the integrated cold station system, the controller is specifically configured to:
judging whether the current water tank temperature is less than a preset water tank temperature value or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is higher than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is not higher than the preset temperature difference value, determining that the to-be-operated mode is a single-mechanism heating mode;
and if the current water tank temperature is not less than the preset water tank temperature value and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine refrigeration mode.
Further, in the integrated cold station system, the integrated cold station system further includes: a third valve and an air-cooled pipeline; the heat pump unit further comprises: a fan;
the third valve and the fan are respectively electrically connected with the controller;
the air cooling pipeline is connected with the cooling water pipeline;
the third valve is arranged on the air-cooled pipeline;
the air cooling pipeline is arranged corresponding to the fan;
the controller is further used for judging whether the current temperature difference is greater than the preset temperature difference or not after adjusting the first valve to the maximum opening degree if the to-be-operated mode is a double-machine mode; and if the current temperature difference is larger than the preset temperature difference, controlling the opening of the third valve, and controlling the fan to rotate forwards so as to dissipate heat of cooling water flowing through the air cooling pipeline.
Further, in the integrated cold station system, the controller is further configured to:
if the to-be-operated mode is the single-mechanism heating mode, the refrigerating unit, the first valve and the third valve are controlled to be closed, the hot water pump and the compressor are controlled to be started, the fan is controlled to rotate reversely, so that the refrigerant on the condenser side absorbs the heat of the outside air, the refrigerant is compressed by the compressor and then heats the hot water, and the heated hot water is transmitted to the water tank through the hot water pipeline;
and if the to-be-operated mode is a single-machine refrigeration mode, controlling the hot water pump and the first valve to be closed, controlling the refrigeration unit and the third valve to be opened, controlling the fan to rotate forwards to dissipate the heat of the cooling water flowing through the air cooling pipeline, and transmitting the cooled cooling water to the refrigeration unit through the cooling water pipeline.
Further, in the integrated cold station system, the chilled water pipe includes: a freezing water supply pipeline and a freezing water return pipeline; the cooling water pipeline includes: a cooling water outlet pipeline and a cooling water inlet pipeline; the hot water pipe includes: a hot water outlet pipeline and a hot water inlet pipeline;
the first end of the air cooling pipeline is connected with the cooling water inlet pipeline;
and the second end of the air cooling pipeline is connected with the cooling water outlet pipeline.
Further, in the integrated cold station system, the temperature detecting assembly includes: a first temperature sensor, a second temperature sensor and a third temperature sensor;
the first temperature sensor is arranged on the freezing water supply pipeline and used for detecting the current freezing water supply temperature;
the second temperature sensor is arranged on the freezing return water pipeline and used for detecting the current freezing return water temperature;
the third temperature sensor is arranged on the water tank and used for detecting the current water tank temperature.
Further, in the integrated cold station system, the refrigeration unit includes: an evaporator, a condenser, a chilled water pump and a cooling water pump;
the chilled water pump is arranged on the chilled water pipeline;
the cooling water pump is arranged on the cooling water pipeline;
the evaporator is connected with the condenser;
the chilled water pipeline is connected with the evaporator;
the cooling water pipeline is connected with the condenser.
The invention also provides a control method of the integrated cold station system, which is applied to the integrated cold station system and comprises the following steps:
acquiring the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature detected by the temperature detection assembly;
determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature;
if the to-be-operated mode is a dual-machine mode, the heat pump unit and the refrigerating unit are controlled to operate synchronously, the hot water pump and the first valve are controlled to be opened, and the first valve is adjusted to be at the maximum opening degree, so that the heat pump unit carries out heat exchange on hot water and cooling water, absorbs the heat of the cooling water and dissipates the heat of the hot water.
Further, in the control method of the integrated cold station system, the determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature, and the current freezing water return temperature includes:
judging whether the current water tank temperature is less than a preset water tank temperature value or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is higher than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is not higher than the preset temperature difference value, determining that the to-be-operated mode is a single-mechanism heating mode;
and if the current water tank temperature is not less than the preset water tank temperature value and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine refrigeration mode.
The present invention also provides a control device of an integrated cold station system, comprising:
the acquisition module is used for acquiring the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature of the freezing water, which are detected by the temperature detection assembly;
the determining module is used for determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature;
and the control module is used for controlling the heat pump unit and the refrigerating unit to synchronously operate if the to-be-operated mode is a double-machine mode, controlling the hot water pump and the first valve to be opened, and adjusting the first valve to the maximum opening degree so that the heat pump unit exchanges heat with hot water and cooling water, absorbs the heat of the cooling water and dissipates the heat of the hot water.
Further, in the control device of the integrated cold station system, the determining module is specifically configured to:
judging whether the current water tank temperature is less than a preset water tank temperature value or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is higher than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is not higher than the preset temperature difference value, determining that the to-be-operated mode is a single-mechanism heating mode;
and if the current water tank temperature is not less than the preset water tank temperature value and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine refrigeration mode.
An integrated cold station system and a control method and device thereof, the integrated cold station system comprises: the container, and the controller, the refrigerating unit, the heating unit, the temperature detection component, the first valve, the chilled water pipeline, the cooling water pipeline and the hot water pipeline which are arranged in the container; the heating unit includes: the system comprises a heat pump unit, a water tank and a hot water pump; the temperature detection assembly detects the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature in real time; the controller determines a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature, and when the to-be-operated mode is a dual-machine mode, the controller controls the heat pump unit and the refrigerating unit to operate synchronously, controls the hot water pump and the first valve to be opened, and adjusts the first valve to the maximum opening degree so that the heat pump unit can exchange heat with hot water and cooling water, absorb the heat of the cooling water and radiate the heat of the hot water. By adopting the technical scheme of the invention, the heat pump unit can be used for dissipating the heat of the absorbed cooling water to the hot water, so that the heat of the cooling water is not required to be discharged to the outside air, and the heat is not required to be obtained from the outside air to heat the hot water, thereby reducing the energy waste and reducing the energy consumption of the integrated cold station.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic block diagram of an integrated cold station system according to one embodiment of the present invention;
FIG. 2 is a schematic illustration of the heat pump assembly of FIG. 1;
FIG. 3 is a flow chart provided by one embodiment of a method of controlling the integrated cold station system of the present invention;
fig. 4 is a schematic structural diagram provided by an embodiment of the control device of the integrated cold station system of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic structural diagram provided in an embodiment of the integrated cold station system of the present invention, and as shown in fig. 1, the integrated cold station system of the present embodiment includes: the system comprises a container 101, a controller 102, a refrigerating unit 103, a heating unit 104, a temperature detection assembly 105, a first valve 106, a chilled water pipeline 107, a cooling water pipeline 108 and a hot water pipeline 109; the heating unit 104 includes: a heat pump unit 1041, a water tank 1042 and a hot water pump 1043.
The controller 102, the refrigerating unit 103, the heating unit 104, the temperature detecting assembly 105, the first valve 106, the chilled water pipe 107, the cooling water pipe 108 and the hot water pipe 109 are all integrated in the container 101. The refrigerating unit 103 transmits chilled water with a user end through a chilled water pipeline 107; the refrigerating unit 103 transmits cooling water with the heat pump unit 1041 through a cooling water pipeline 108; the water tank 1042 transmits hot water with the heat pump unit 1041 through the hot water pipe 109. The hot water pump 1043 is arranged on the hot water pipeline 109; the first valve 106 is provided on the cooling water pipe 108. The refrigeration unit 103, the hot water pump 1043, the heat pump unit 1041 and the first valve 106 are electrically connected to the controller 102, respectively. The first valve 106 is preferably an electric valve, and the controller 102 is preferably a programmable logic controller PLC. The user side is a part of the central air conditioner corresponding to the user to which the integrated cold station system of the embodiment is applied.
In this embodiment, the temperature detection module 105 may detect the current tank temperature of the water tank, the current chilled water supply temperature of the chilled water, and the current chilled return water temperature in real time. The current freezing water supply temperature is the temperature of the chilled water transmitted to the refrigeration unit 103 by the user side, and the current freezing water return temperature is the temperature of the chilled water transmitted to the user side after the refrigeration unit 103 cools the chilled water. The controller 102 may obtain the current water tank temperature, the current freezing water supply temperature and the current freezing water return temperature detected by the temperature detection component 105, and determine the to-be-operated mode of the integrated cold station system according to the current water tank temperature, the current freezing water supply temperature and the current freezing water return temperature. If the mode to be operated is determined to be a dual-machine mode, the controller 102 controls the heat pump unit 1041 and the refrigeration unit 103 to operate synchronously, and also controls the hot water pump 1043 and the first valve 106 to be opened, and adjusts the first valve 106 to a maximum opening degree, so that the heat pump unit 1041 performs heat exchange on cooling water transmitted by the refrigeration unit 103 through the cooling water pipeline 108, absorbs heat of the cooling water, and transmits the heat to hot water, and the hot water is transmitted by the water tank 1042 through the hot water pipeline 109. The cooling water having absorbed heat by the heat pump unit 1041 is transferred to the refrigerating unit 103 through the cooling water pipe 108, and the hot water having provided heat by the heat pump unit 1041 is transferred to the water tank 1042 through the hot water pipe 109. In addition, the operation of the cooling water and the chilled water in the refrigeration unit 103 and the application of the hot water in the water tank 1042 are the same as those of the cooling station of the central air conditioner in the prior art, and thus the detailed description thereof is omitted.
Heat pump set 1041 in this embodiment can directly give hot water with the heat conduction in the cooling water, need not to arrange the heat of cooling water to the outside air, also need not to acquire the heat from the outside air and to the hot water heating to can reduce the waste of the energy, reduce the energy consumption of integrated cold station, and not to outside air discharge heat, also do not acquire the heat from the outside air, can also reduce the loss of electric energy. In addition, in the prior art, the refrigerating unit and the heating unit are separately arranged and are not integrated, in this embodiment, because the refrigerating unit 103 and the water tank 1042 are integrated together through the heat pump unit 1041 for heat exchange between cooling water and hot water, the integration rate of the integrated cold station system is improved, the floor area and the field construction amount can be reduced, and the installation portability is improved.
In the integrated cold station system of this embodiment, the temperature detection module 105 detects the current tank temperature of the water tank 1042, the current chilled water supply temperature of the chilled water, and the current chilled return water temperature in real time; the controller 102 determines a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing water return temperature; if the operation mode is the dual-machine mode, the controller 102 controls the heat pump unit 1041 and the refrigeration unit 103 to synchronously operate, controls the hot water pump 1043 and the first valve 106 to be opened, and adjusts the first valve 106 to the maximum opening degree, so that the heat pump unit 1041 exchanges heat with hot water and cooling water, absorbs heat of the cooling water, and dissipates heat to the hot water. By adopting the technical scheme of this embodiment, the heat pump unit 1041 can be used for the heat dissipation to the hot water with the heat of the cooling water of absorption to need not to arrange the heat of cooling water to the outside air, also need not to obtain the heat from the outside air and to the hot water heating, reduced the energy waste, reduced the energy consumption of integrated cold station.
Further, fig. 2 is a schematic structural diagram of the heat pump unit in fig. 1, and as shown in fig. 1 and fig. 2, in the integrated cold station system of this embodiment, the heat pump unit 1041 includes: an evaporator side refrigerant 10411, a condenser side refrigerant 10412, a compressor 10413, and a second valve 10414. The compressor 10413 and the second valve 10414 are each electrically connected to the controller 102; the evaporator side refrigerant 10411 can absorb the heat of the cooling water transmitted by the cooling water pipeline 108 to reduce the temperature of the cooling water; the compressor 10413 can compress the evaporator side refrigerant 10411 that has absorbed the heat of the cooling water, thereby radiating the heat to the condenser side refrigerant 10412; the condenser side refrigerant 10412 may dissipate heat from the hot water transferred to the hot water pipe 109 to raise the temperature of the hot water. The second valve 10414 may control a circulation of the refrigerant. The second valve 10414 is preferably an electronic expansion valve, the evaporator side refrigerant 10411 is preferably a low-temperature and low-pressure refrigerant, and the condenser side refrigerant 10412 is preferably a high-temperature and high-pressure refrigerant. The specific working flow among the refrigerant, the compressor 10413 and the electronic expansion valve is the same as that of the air conditioner in the prior art, and is not described herein again.
Further, in the integrated cold station system of the embodiment, when the controller 102 determines the to-be-operated mode, the specific steps are as follows: and judging whether the current water tank temperature is less than a preset water tank temperature value and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value, wherein the preset water tank temperature value and the preset temperature difference value are parameters preset by a user. If the current water tank temperature is judged to be less than the preset water tank temperature value and the current temperature difference is larger than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode; if the current water tank temperature is judged to be less than the preset water tank temperature value and the current temperature difference is not greater than the preset temperature difference value, determining that the to-be-operated mode is the single-machine heating mode; and if the current water tank temperature is judged to be not less than the preset temperature value of the water tank and the current temperature difference is larger than the preset temperature difference value, determining that the to-be-operated mode is the single-machine refrigeration mode.
Further, the integrated cold station system of the present embodiment further includes: a third valve 110 and an air-cooled duct 111; the heat pump unit 1041 further includes a blower fan 10415. The third valve 110 and the fan 10415 are respectively electrically connected with the controller 102; the air-cooled pipeline 111 is connected with the cooling water pipeline 108; the third valve 110 is disposed on the air-cooled duct 111, and the air-cooled duct 111 is disposed corresponding to the fan 10415. If the mode to be operated is determined to be the dual mode, the first valve 106 is opened and adjusted to the maximum opening degree, and then the current temperature difference and the preset temperature difference need to be compared in real time, so that whether the current temperature difference is larger than the preset temperature difference or not is judged in real time. If the current temperature difference is larger than the preset temperature difference, it is indicated that the heat absorbed by the refrigerant 10411 on the evaporator side in the heat pump unit 1041 is insufficient to support the requirement of the refrigeration unit 103 on the cooling water, then the controller 102 is required to control the third valve 110 to open, so that a part of the cooling water output by the cooling water pipeline 108 flows into the air-cooled pipeline 111, the controller 101 controls the fan 10415 to rotate forward, so as to cool the cooling water in the air-cooled pipeline 111, and then both the cooling water cooled by air cooling and the cooling water cooled by refrigerant flow into the cooling water pipeline 108 and are transmitted back to the refrigeration unit 103. If the current temperature difference is still greater than the preset temperature difference during the real-time comparison between the current temperature difference and the preset temperature difference, the opening degree of the third valve 110 is gradually increased until the maximum opening degree is reached. The direction of the wind when the fan 10415 rotates forward is the direction indicated by the arrow in fig. 2. The third valve 110 is preferably an electrically operated valve. The first valve 110 is disposed at a position of the cooling water pipeline 108 after being connected to the air-cooled pipeline 111 to generate a branch, as shown in fig. 2, so that the air-cooled cooling and the refrigerant cooling of the cooling water can be independently controlled.
Further, in the integrated cold station system of this embodiment, if the determined to-be-operated mode is the single-machine heating mode, the controller 102 controls the refrigeration unit 103, the first valve 106, and the third valve 110 to be closed, controls the hot water pump 1043 and the compressor 10413 to be opened, and controls the fan 10415 to rotate reversely, so that the condenser-side refrigerant 10412 absorbs the external air heat blown by the fan 10415 to realize heat exchange, the absorbed air heat is compressed by the compressor 10413 and then heated by the hot water transmitted by the hot water pipe 109, and the heated hot water is transmitted to the water tank 1042 through the hot water pipe 109.
If the determined operation mode to be executed is the single-machine refrigeration mode, the controller 102 controls the hot water pump 1043 and the first valve 106 to be closed, controls the refrigeration unit 103 and the third valve 110 to be opened, and controls the fan 10415 to rotate forward to dissipate the heat of the cooling water flowing through the air-cooled pipeline 111, and the cooled cooling water flows into the cooling water pipeline 108 from the air-cooled pipeline 111 and is then transmitted back to the refrigeration unit 103.
Further, in the integrated cold station system of the present embodiment, the chilled water pipe 107 includes: a chilled water supply pipe 1071 and a chilled water return pipe 1072; the cooling water pipe 108 includes: a cooling outlet pipe 1082 and a cooling inlet pipe 1081; the hot water pipe 109 includes: a hot water outlet pipe 1092 and a hot water inlet pipe 1091. The first end of the air-cooled pipeline 111 is connected with a cooling water inlet pipeline 1081; the second end of the air-cooling pipe 111 is connected with the cooling water outlet pipe 1082. As shown in fig. 1 and 2, hot water pump 1043 is preferably disposed on hot water outlet conduit 1092, and first valve 106 is preferably disposed on cooling inlet conduit 1081.
Further, in the integrated cold station system of the present embodiment, the temperature detecting assembly 105 includes: a first temperature sensor 1051, a second temperature sensor 1052 and a third temperature sensor 1053. The first temperature sensor 1051 is arranged on the chilled water supply pipeline 1071 and used for detecting the current chilled water supply temperature of the chilled water in the chilled water supply pipeline 1071; the second temperature sensor 1052 is arranged on the freezing water return pipeline 1072 and used for detecting the current freezing water return temperature of the freezing water in the freezing water return pipeline 1072; a third temperature sensor 1053 is provided on the water tank 1042 for detecting the current tank temperature of the hot water in the water tank 1042.
Further, in the integrated cold station system of the present embodiment, the refrigeration unit 103 includes: an evaporator 1031, a condenser 1032, a chilled water pump 1033, and a cooling water pump 1034. The chilled water pump 1033 is disposed on the chilled water return pipe 1072; the cooling water pump 1034 is arranged on the cooling water outlet pipe 1082; the evaporator 1031 is connected to the condenser 1032; the chilled water pipe 107 is connected to the evaporator 1031; the cooling water pipe 108 is connected to the condenser 1032. Here, the circulation of the refrigerant between the evaporator 1031 and the condenser 1032 needs to be performed by a compressor, and although not shown in fig. 1, the work flow between the evaporator 1031 and the condenser 1032 is the same as that of the evaporator and the condenser in the conventional air conditioner, and thus, the description thereof is omitted.
In order to be more comprehensive, the application also provides a control method of the integrated cold station system, which corresponds to the integrated cold station system provided by the embodiment of the invention.
Fig. 3 is a flowchart provided in an embodiment of a control method of an integrated cold station system according to the present invention, the control method of the integrated cold station system according to the present embodiment is applied to the integrated cold station system according to the above embodiment, and an execution subject of the control method of the integrated cold station system is a controller in the integrated cold station system according to the above embodiment.
As shown in fig. 3, the specific steps of the control method of the integrated cold station system of the present embodiment are as follows:
s101, obtaining the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing water return temperature of the freezing water, which are detected by the temperature detection assembly.
And S102, determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing water return temperature.
S103, if the to-be-operated mode is a double-machine mode, controlling the heat pump unit and the refrigerating unit to synchronously operate, controlling the hot water pump and the first valve to be opened, and adjusting the first valve to the maximum opening degree so that the heat pump unit carries out heat exchange on hot water and cooling water, absorbs the heat of the cooling water and radiates the heat to the hot water.
The control method of the integrated cold station system of the embodiment obtains the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature of the freezing water, which are detected by the temperature detection assembly; determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing water return temperature; if the operation mode is a dual-machine mode, the heat pump unit and the refrigerating unit are controlled to synchronously operate, the hot water pump and the first valve are controlled to be opened, and the first valve is adjusted to the maximum opening degree, so that the heat pump unit carries out heat exchange on hot water and cooling water, absorbs the heat of the cooling water and dissipates the heat of the hot water. Adopt the technical scheme of this embodiment, can utilize heat pump set to be used for the heat dissipation to the hot water with the heat of the cooling water of absorption to need not to arrange the heat of cooling water to the outside air, also need not to obtain the heat from the outside air and to the hot water heating, reduced the energy waste, reduced the energy consumption of integrated cold station.
Further, in the control method of the integrated cold station system of this embodiment, step S102 specifically includes:
firstly, judging whether the current water tank temperature is less than a preset temperature value of the water tank or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
secondly, if the current water tank temperature is lower than a preset water tank temperature value and the current temperature difference is higher than a preset temperature difference value, determining that the to-be-operated mode is a double-machine mode; if the current water tank temperature is less than the preset temperature value of the water tank and the current temperature difference is not greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine heating mode; and if the current water tank temperature is not less than the preset temperature value of the water tank and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is the single-machine refrigeration mode.
With regard to the control method of the integrated cold station system in the above-described embodiment, the specific manner in which the respective steps perform operations has been described in detail in the embodiment related to the integrated cold station system, and will not be elaborated herein.
In order to be more comprehensive, the application also provides a control device of the integrated cold station system, which corresponds to the control method of the integrated cold station system provided by the embodiment of the invention.
Fig. 4 is a schematic structural diagram provided by an embodiment of the control device of the integrated cold station system of the present invention, and as shown in fig. 4, the control device of the integrated cold station system of the present embodiment includes: an acquisition module 11, a determination module 12 and a control module 13.
The acquisition module 11 is configured to acquire a current water tank temperature of the water tank, a current chilled water supply temperature of chilled water, and a current chilled return water temperature, which are detected by the temperature detection assembly;
the determining module 12 is used for determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing water return temperature;
and the control module 13 is used for controlling the heat pump unit and the refrigerating unit to synchronously operate if the to-be-operated mode is a dual-machine mode, controlling the hot water pump and the first valve to be opened, and adjusting the first valve to the maximum opening degree so that the heat pump unit exchanges heat between hot water and cooling water, absorbs the heat of the cooling water, and dissipates heat to the hot water.
The controlling means of the integrated cold station system of this embodiment can utilize heat pump set to be used for the heat dissipation to the hot water with the heat of the cooling water of absorption to need not to arrange the heat of cooling water to outside air, also need not to acquire the heat from outside air and to the hot water heating, reduced the energy waste, reduced the energy consumption of integrated cold station.
Further, in the control device of the integrated cold station system of the embodiment, the determining module 12 is specifically configured to:
judging whether the current water tank temperature is less than a preset temperature value of the water tank or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
if the current water tank temperature is less than the preset temperature value of the water tank and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode; if the current water tank temperature is less than the preset temperature value of the water tank and the current temperature difference is not greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine heating mode; and if the current water tank temperature is not less than the preset temperature value of the water tank and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is the single-machine refrigeration mode.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. An integrated cold station system, comprising: the container, and a controller, a refrigerating unit, a heating unit, a temperature detection assembly, a first valve, a freezing water pipeline, a cooling water pipeline and a hot water pipeline which are arranged in the container;
the heating unit includes: the system comprises a heat pump unit, a water tank and a hot water pump;
the refrigerating unit transmits chilled water with a user end through the chilled water pipeline and transmits cooling water with the heat pump unit through the cooling water pipeline;
the water tank is in hot water transmission with the heat pump unit through the hot water pipeline; the hot water pump is arranged on the hot water pipeline; the first valve is arranged on the cooling water pipeline;
the refrigerating unit, the hot water pump, the heat pump unit and the first valve are respectively electrically connected with the controller;
the temperature detection assembly is used for detecting the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature in real time;
the controller is used for determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature, controlling the heat pump unit and the refrigerating unit to synchronously operate when the to-be-operated mode is a double-unit mode, controlling the hot water pump and the first valve to be opened, and adjusting the first valve to the maximum opening degree so that the heat pump unit exchanges heat with the hot water and the cooling water to absorb the heat of the cooling water and radiate the hot water.
2. The integrated cold station system of claim 1, wherein the heat pump unit comprises: the evaporator side refrigerant, the condenser side refrigerant, the compressor and the second valve;
the compressor and the second valve are respectively electrically connected with the controller;
the evaporator side refrigerant is used for absorbing the heat of the cooling water so as to reduce the temperature of the cooling water;
the compressor is used for compressing the refrigerant at the evaporator side absorbing the heat of the cooling water so as to radiate the heat to the refrigerant at the condenser side;
the condenser side refrigerant is used for radiating heat to the hot water so as to raise the temperature of the hot water.
3. The integrated cold station system of claim 2, wherein the controller is specifically configured to:
judging whether the current water tank temperature is less than a preset water tank temperature value or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is higher than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is not higher than the preset temperature difference value, determining that the to-be-operated mode is a single-mechanism heating mode;
and if the current water tank temperature is not less than the preset water tank temperature value and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine refrigeration mode.
4. The integrated cold station system of claim 3, further comprising: a third valve and an air-cooled pipeline; the heat pump unit further comprises: a fan;
the third valve and the fan are respectively electrically connected with the controller;
the air cooling pipeline is connected with the cooling water pipeline;
the third valve is arranged on the air-cooled pipeline;
the air cooling pipeline is arranged corresponding to the fan;
the controller is further used for judging whether the current temperature difference is greater than the preset temperature difference or not after adjusting the first valve to the maximum opening degree if the to-be-operated mode is a double-machine mode; and if the current temperature difference is larger than the preset temperature difference, controlling the opening of the third valve, and controlling the fan to rotate forwards so as to dissipate heat of cooling water flowing through the air cooling pipeline.
5. The integrated cold station system of claim 4, wherein said controller is further configured to:
if the to-be-operated mode is the single-mechanism heating mode, the refrigerating unit, the first valve and the third valve are controlled to be closed, the hot water pump and the compressor are controlled to be started, the fan is controlled to rotate reversely, so that the refrigerant on the condenser side absorbs the heat of the outside air, the refrigerant is compressed by the compressor and then heats the hot water, and the heated hot water is transmitted to the water tank through the hot water pipeline;
and if the to-be-operated mode is a single-machine refrigeration mode, controlling the hot water pump and the first valve to be closed, controlling the refrigeration unit and the third valve to be opened, controlling the fan to rotate forwards to dissipate the heat of the cooling water flowing through the air cooling pipeline, and transmitting the cooled cooling water to the refrigeration unit through the cooling water pipeline.
6. The integrated cold station system of claim 4, wherein the chilled water conduit comprises: a freezing water supply pipeline and a freezing water return pipeline; the cooling water pipeline includes: a cooling water outlet pipeline and a cooling water inlet pipeline; the hot water pipe includes: a hot water outlet pipeline and a hot water inlet pipeline;
the first end of the air cooling pipeline is connected with the cooling water inlet pipeline;
and the second end of the air cooling pipeline is connected with the cooling water outlet pipeline.
7. The integrated cold station system of claim 6, wherein said temperature detection assembly comprises: a first temperature sensor, a second temperature sensor and a third temperature sensor;
the first temperature sensor is arranged on the freezing water supply pipeline and used for detecting the current freezing water supply temperature;
the second temperature sensor is arranged on the freezing return water pipeline and used for detecting the current freezing return water temperature;
the third temperature sensor is arranged on the water tank and used for detecting the current water tank temperature.
8. The integrated cold station system of claim 1, wherein the refrigeration unit comprises: an evaporator, a condenser, a chilled water pump and a cooling water pump;
the chilled water pump is arranged on the chilled water pipeline;
the cooling water pump is arranged on the cooling water pipeline;
the evaporator is connected with the condenser;
the chilled water pipeline is connected with the evaporator;
the cooling water pipeline is connected with the condenser.
9. A control method of an integrated cold station system, applied to the integrated cold station system of any one of claims 1-8, the method comprising:
acquiring the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature detected by the temperature detection assembly;
determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature;
if the to-be-operated mode is a dual-machine mode, the heat pump unit and the refrigerating unit are controlled to operate synchronously, the hot water pump and the first valve are controlled to be opened, and the first valve is adjusted to be at the maximum opening degree, so that the heat pump unit carries out heat exchange on hot water and cooling water, absorbs the heat of the cooling water and dissipates the heat of the hot water.
10. The control method of an integrated cold station system according to claim 9, wherein said determining a standby mode according to said current tank temperature, said current chilled water supply temperature and said current chilled water return temperature comprises:
judging whether the current water tank temperature is less than a preset water tank temperature value or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is higher than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is not higher than the preset temperature difference value, determining that the to-be-operated mode is a single-mechanism heating mode;
and if the current water tank temperature is not less than the preset water tank temperature value and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine refrigeration mode.
11. A control apparatus for an integrated cold station system, comprising:
the acquisition module is used for acquiring the current water tank temperature of the water tank, the current freezing water supply temperature of the freezing water and the current freezing return water temperature of the freezing water, which are detected by the temperature detection assembly;
the determining module is used for determining a to-be-operated mode according to the current water tank temperature, the current freezing water supply temperature and the current freezing return water temperature;
and the control module is used for controlling the heat pump unit and the refrigerating unit to synchronously operate if the to-be-operated mode is a double-machine mode, controlling the hot water pump and the first valve to be opened, and adjusting the first valve to the maximum opening degree so that the heat pump unit exchanges heat with hot water and cooling water, absorbs the heat of the cooling water and dissipates the heat of the hot water.
12. The control device of an integrated cold station system of claim 11, wherein the determination module is specifically configured to:
judging whether the current water tank temperature is less than a preset water tank temperature value or not and whether the current temperature difference between the current freezing water supply temperature and the current freezing water return temperature is greater than a preset temperature difference value or not;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is higher than the preset temperature difference value, determining that the to-be-operated mode is a double-machine mode;
if the current water tank temperature is lower than the preset water tank temperature value and the current temperature difference is not higher than the preset temperature difference value, determining that the to-be-operated mode is a single-mechanism heating mode;
and if the current water tank temperature is not less than the preset water tank temperature value and the current temperature difference is greater than the preset temperature difference value, determining that the to-be-operated mode is a single-machine refrigeration mode.
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