CN111692748A - Heat pump hot water system with internet transmission, diagnosis and management functions and control method thereof - Google Patents
Heat pump hot water system with internet transmission, diagnosis and management functions and control method thereof Download PDFInfo
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- CN111692748A CN111692748A CN202010595802.7A CN202010595802A CN111692748A CN 111692748 A CN111692748 A CN 111692748A CN 202010595802 A CN202010595802 A CN 202010595802A CN 111692748 A CN111692748 A CN 111692748A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a heat pump hot water system with internet transmission, diagnosis and management functions and a control method thereof, wherein the heat pump hot water system comprises a compressor, a condenser, a throttle valve, an evaporator and a water storage tank; is characterized in that the heat pump hot water system also comprises a circulating water pump, a room heat exchanger, a system controller, a power-electric energy meter, a WiFi module, a water storage tank temperature sensor, a room air temperature sensor and an outdoor environment temperature sensor. The advantages are that: the energy efficiency of a heat pump hot water system is improved by adopting a variable-temperature water supply mode, so that the energy conservation of the heat pump operation is realized; the actual energy-saving effect of the variable-temperature water supply operation mode can be monitored, the operation parameters and the energy-saving effect of the heat pump can be uploaded to a third-party platform, and the energy hosting service and the fault pre-diagnosis of the heat pump are facilitated.
Description
Technical Field
The invention relates to the technical field of refrigeration and energy conservation of a heat pump hot water system, in particular to a heat pump hot water system with internet transmission, diagnosis and management functions and a control method thereof.
Background
The heat pump water heater is used as an efficient energy-saving hot water product and is increasingly applied to building heating. But also has some problems in application, firstly, the heat pump hot water system has higher operating energy cost compared with the traditional coal-fired heating system; secondly, the heat pump hot water system has certain operation faults, which influence the use of users. Therefore, the heat pump operation energy saving and the heat pump operation reliability become the technical problems to be solved urgently in the heat pump hot water heating industry.
The analysis shows that the water supply mode adopted by the existing heat pump hot water system is mostly a constant temperature water supply mode, namely the water supply temperature of the heat pump hot water system is a constant mode no matter how the room cold load changes, and is determined according to the requirement of the maximum design cold load. For example, the floor heating system is used as an example, the water supply temperature is set to be 45 ℃, but actually, the outdoor environment temperature changes greatly in the whole heating season and even every day, which directly causes the change of the room cold load, and this indicates that the water supply temperature of the heat pump hot water system should change along with the change of the room cold load, namely, the water supply temperature is changed. When the cold load is smaller, the water supply temperature can be properly reduced, so that the energy conservation of the heat pump operation is realized. On the other hand, a third-party hosting service mode is gradually adopted for the heat pump hot water system, mainly including contract energy management and after-sales service hosting, and the problem that the operation data of the heat pump hot water system needs to be uploaded to a third-party platform is involved, so that the heat pump hot water system needs to have an energy-saving technology and an internet related technology as a support.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a heat pump hot water system with internet transmission, diagnosis and management functions and a control method thereof, which can determine the optimal water supply temperature of the heat pump hot water system according to the outdoor environment temperature and the set room temperature, can automatically record the operation parameters of the heat pump hot water system and carry out comparison operation of energy-saving effect, and upload the data to a third party hosting platform through a WiFi module of the equipment.
In order to achieve the above purpose, the technical scheme of the heat pump hot water system with internet transmission, diagnosis and management functions is realized in such a way that the heat pump hot water system comprises a compressor, a condenser, a throttle valve, an evaporator and a water storage tank; the system is characterized by also comprising a circulating water pump, a room heat exchanger, a system controller, a power-electric energy meter, a WiFi module, a water storage tank temperature sensor, a room air temperature sensor (8) and an outdoor environment temperature sensor;
the air outlet of the compressor is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the throttle valve, the outlet of the throttle valve is connected with the inlet of the evaporator, and the outlet of the evaporator is connected with the inlet of the compressor;
the water outlet of the water storage tank is connected with the inlet of a circulating water pump, the outlet of the circulating water pump is connected with the inlet of a room heat exchanger, and the outlet of the room heat exchanger is connected with the water return port of the water storage tank;
the power-electric energy meter is arranged at the input end of a main power supply of the heat pump water heating system, and the power-electric energy meter, the WiFi module, the water storage tank temperature sensor, the room air temperature sensor and the outdoor environment temperature sensor are respectively and electrically connected with the system controller.
In the technical scheme, the control method of the heat pump hot water system with the functions of internet transmission, diagnosis and management is characterized in that:
the temperature sensed by the outdoor environment temperature sensor is outdoor environment temperature Tw, the temperature sensed by the water tank temperature sensor is actual water supply temperature Tgs, and the temperature sensed by the room air temperature sensor is actual room temperature Tns;
setting room set temperature T 'ns in the system controller, determining a required theoretical water supply temperature T's according to the room set temperature T 'ns and the detected outdoor environment temperature Tw by the system controller, and controlling the on-off of the compressor according to the comparison condition of the actual water supply temperature Tgs and the theoretical water supply temperature T's; when the actual water supply temperature Tgs is greater than T' gs, the compressor stops operating; when the actual water supply temperature Tgs is less than or equal to T' gs, the compressor is started;
the system controller controls the on-off of the circulating water pump according to the comparison condition of the detected actual room temperature Tns and the set room temperature T' ns; when the actual room temperature Tns is greater than the set room temperature T 'ns, the circulating water pump stops operating, and when the actual room temperature Tns is less than or equal to the set room temperature T' ns, the circulating water pump starts operating;
the system controller obtains the actual running power Ps, the accumulated consumed electric energy Ws and the actual water supply temperature Tgs of the heat pump through the power-electric energy meter, synchronously calculates the constant-temperature running power Ph and the constant-temperature accumulated consumed electric energy Wh of the heat pump running in a constant-temperature water supply mode according to the same heat generated in the variable-temperature running of the heat pump, and obtains the accumulated electricity saving amount of the variable-temperature water supply relative to the constant-temperature water supply
ΔW；
The system controller uploads the acquired data of the outdoor environment temperature Tw, the actual water supply temperature Tgs, the actual room temperature Tns, the set room temperature Tnd, the on-off time of the compressor, the on-off time of the circulating water pump, the actual operating power Ps of variable-temperature water supply of the heat pump, the accumulated consumed electric energy Ws, the constant-temperature operating power Ph of the heat pump, the accumulated consumed electric energy Wh of the constant temperature and the accumulated electricity-saving quantity delta W to a third party platform through a WiFi module for energy hosting service and heat pump fault pre-diagnosis.
In the technical scheme, the control method of the heat pump hot water system with the functions of internet transmission, diagnosis and management is characterized in that:
the method for determining the required theoretical water supply temperature T' gs comprises the following steps: setting outdoor environment temperature T ' w to-15 ℃, room setting temperature T ' ns to 20 ℃ and a constant-temperature water supply mode setting water supply temperature T's to 45 ℃ as design criteria, wherein the theoretical water supply temperature T's is changed with the outdoor environment temperature Tw and the room setting temperature T's to T ' gs =0.5 (T ' ns-Tw) + 27.5.
In the technical scheme, the control method of the heat pump hot water system with the functions of internet transmission, diagnosis and management is characterized in that:
when the water supply temperature Tgs of the constant-temperature water supply mode is 45 ℃, the specific calculation methods of the constant-temperature operation power Ph, the constant-temperature accumulated consumed electric energy Wh and the accumulated electricity-saving quantity delta W are as follows:
（a）Ph= Ps·[( 45-Tw) / 318]/ [( Tgs-Tw) / (273+ Tgs)]；
(b) wh = Σ Ph · Δ t, Δ t is Ph value interval time, and Ph is power data obtained by detecting for 1 time within each 1 interval time Δ t;
（c）ΔW= Wh-Ws。
compared with the prior art, the invention has the following advantages:
(1) the energy efficiency of a heat pump hot water system is improved by adopting a variable-temperature water supply mode, so that the energy conservation of the heat pump operation is realized;
(2) the actual energy-saving effect of the variable-temperature water supply operation mode can be monitored, the operation parameters and the energy-saving effect of the heat pump can be uploaded to a third-party platform, and the energy hosting service and the fault pre-diagnosis of the heat pump are facilitated.
Drawings
Fig. 1 is a schematic diagram of a heat pump hot water system embodying the present invention.
Detailed Description
An embodiment of the invention, an example of which is shown in fig. 1, is described in detail below. The embodiments described below with reference to fig. 1 are exemplary only for the purpose of illustrating the present invention and should not be construed as limiting the present invention.
As shown in fig. 1, the present invention is a heat pump hot water system with internet transmission, diagnosis and management functions, comprising an evaporator 1, a compressor 2, a throttle valve 3, a condenser 4, a water storage tank 5, a circulating water pump 6, a room heat exchanger 7, a room air temperature sensor 8, a water storage tank temperature sensor 9, a system controller 10, a power-electric energy meter 11, a WiFi module 12 and an outdoor environment temperature sensor 13.
The air outlet of the compressor 2 is connected with the inlet of the condenser 4, the outlet of the condenser 4 is connected with the inlet of the throttle valve 3, the outlet of the throttle valve 3 is connected with the inlet of the evaporator 4, and the outlet of the evaporator 4 is connected with the inlet of the compressor 1. When the heat pump refrigerating system is operated, refrigerant gas discharged by the compressor 2 enters the condenser 4, water in the water storage tank 5 is heated through the condenser 4, meanwhile, the refrigerant in the condenser 4 is condensed into liquid, throttled through the throttle valve 3, enters the evaporator 1 for evaporation, and then enters the compressor 2.
The water outlet of the water storage tank 5 is connected with the inlet of a circulating water pump 6, the outlet of the circulating water pump 6 is connected with the inlet of a room heat exchanger 7, and the outlet of the room heat exchanger 7 is connected with the water return port of the water storage tank 5. When the water supply system is running, hot water is pumped into the room heat exchanger 7 from the water storage tank 5 through the circulating water pump 6, exchanges heat with the room air through the room heat exchanger 7, is cooled, and then returns to the water storage tank 5.
The room air temperature sensor 8, the water storage tank temperature sensor 9, the system controller 10, the power-electric energy meter 11, the WiFi module 12 and the outdoor environment temperature sensor 13 are electrically connected with the system controller 10 respectively.
The power-electric energy meter 11 is installed at the input end of the main power supply of the heat pump hot water system and is used for measuring the actual operating power Ps and the accumulated consumed electric energy Ws of the variable-temperature water supply of the heat pump. The temperature sensed by the outdoor ambient temperature sensor 13 is the outdoor ambient temperature Tw, the temperature sensed by the water tank temperature sensor 9 is the actual water supply temperature Tgs, and the temperature sensed by the room air temperature sensor 8 is the actual room temperature Tns.
Setting a room set temperature T ' ns in the system controller 10, determining a required theoretical water supply temperature T's by the system controller 10 according to the room set temperature T ' ns and the detected outdoor environment temperature Tw, and controlling the compressor 1 to start and stop by the system controller 10 according to a comparison between the actual water supply temperature Tgs and the theoretical water supply temperature Tgs; when the actual water supply temperature Tgs > Tgs, the compressor 2 stops operating; when the actual water supply temperature Tgs is equal to or less than Tgs, the compressor 2 is turned on.
In the present embodiment, the method of determining the theoretical feed water temperature T' gs is: setting outdoor environment temperature T ' w to-15 ℃, room setting temperature T ' ns to 20 ℃ and setting water supply temperature T's to 45 ℃ in a constant-temperature water supply manner as design criteria, wherein the theoretical water supply temperature T's is changed with the outdoor environment temperature Tw and the room setting temperature T's to T ' gs =0.5 (T's-Tw) + 27.5.
The system controller 10 also controls the on/off of the circulating water pump 6 by comparing the detected actual room temperature Tns with the room set temperature T' ns; when the actual room temperature Tns > the room set temperature T 'ns, the circulating water pump 6 stops operating, and when the actual room temperature Tns is equal to or less than the room set temperature T' ns, the circulating water pump 6 starts operating.
The system controller 10 further obtains the actual operating power Ps, the accumulated consumed electric energy Ws and the actual water supply temperature Tgs of the heat pump through the power-electric energy meter 11, and the system controller 10 synchronously calculates the constant-temperature operating power Ph and the constant-temperature accumulated consumed electric energy Wh of the heat pump in the constant-temperature water supply mode according to the same heat generated in the variable-temperature operation of the heat pump, and obtains the accumulated electricity saving amount Δ W of the variable-temperature water supply relative to the constant-temperature water supply. In this embodiment, the constant temperature water supply temperature Tgs is 45 ℃, the constant temperature operating power Ph, the constant temperature accumulated power consumption Wh, and the accumulated power saving amount Δ W are specifically calculated as follows:
（1）Ph= Ps·[( 45-Tw) / 318]/ [( Tgs-Tw) / (273+ Tgs)]；
(2) wh = Σ Ph · Δ t, Δ t is Ph value interval time, in this embodiment, Δ t is 10s, and Ph is power data obtained by detecting 1 time every 10 s;
（3）ΔW= Wh-Ws。
the system controller 10 uploads the acquired data of the outdoor environment temperature Tw, the actual water supply temperature Tgs, the actual room temperature Tns, the set room temperature Tnd, the on-off time of the compressor 2, the on-off time of the circulating water pump 6, the actual operating instantaneous power Ps of the variable-temperature water supply of the heat pump, the accumulated consumed electric energy Ws, the calculated instantaneous power Ph of the constant-temperature water supply of the heat pump, the accumulated consumed electric energy Wh and the accumulated energy saving amount Δ W of the variable-temperature water supply to a third party platform through the WiFi module 12, and the data are used for energy service and heat pump fault pre-diagnosis.
In this example, the temperature units are all ℃. The system controller 10, the power-electric energy meter 11 and the WiFi module 12 are all prior art and will not be described in detail.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A heat pump hot water system with internet transmission, diagnosis and management functions comprises a compressor (2), a condenser (4), a throttle valve (3), an evaporator (1) and a water storage tank (5); the solar energy water heater is characterized by further comprising a circulating water pump (6), a room heat exchanger (7), a system controller (10), a power-electric energy meter (11), a WiFi module (12), a water storage tank temperature sensor (9), a room air temperature sensor (8) and an outdoor environment temperature sensor (13);
the exhaust port of the compressor (2) is connected with the inlet of a condenser (4), the outlet of the condenser (4) is connected with the inlet of a throttle valve (3), the outlet of the throttle valve (3) is connected with the inlet of an evaporator (4), and the outlet of the evaporator (4) is connected with the inlet of the compressor (1);
the water outlet of the water storage tank (5) is connected with the inlet of a circulating water pump (6), the outlet of the circulating water pump (6) is connected with the inlet of a room heat exchanger (7), and the outlet of the room heat exchanger (7) is connected with the water return port of the water storage tank (5);
the power-electric energy meter (11) is installed at the input end of a main power supply of the heat pump hot water system, and the power-electric energy meter (11), the WiFi module (12), the water storage tank temperature sensor (9), the room air temperature sensor (8) and the outdoor environment temperature sensor (13) are electrically connected with the system controller (10) respectively.
2. The control method of a heat pump hot water system with internet transmission, diagnosis and management functions as claimed in claim 1, wherein:
the temperature sensed by the outdoor environment temperature sensor (13) is an outdoor environment temperature Tw, the temperature sensed by the water tank temperature sensor (9) is an actual water supply temperature Tgs, and the temperature sensed by the room air temperature sensor (8) is an actual room temperature Tns;
setting a room set temperature T ' ns in the system controller (10), the system controller (10) determining a required theoretical water supply temperature T's from the room set temperature T's and the detected outdoor environmental temperature Tw, and controlling the start and stop of the compressor (2) according to a comparison of the actual water supply temperature Tgs and the theoretical water supply temperature Tgs; when the actual water supply temperature Tgs > Tgs, the compressor (2) stops operating; when the actual water supply temperature Tgs is less than or equal to T' gs, the compressor (2) is started;
the system controller (10) controls the on/off of the circulating water pump (6) through the comparison condition of the detected actual room temperature Tns and the set room temperature T' ns; when the actual room temperature Tns is greater than the set room temperature T 'ns, the circulating water pump (6) stops operating, and when the actual room temperature Tns is less than or equal to the set room temperature T' ns, the circulating water pump (6) starts operating;
the system controller (10) obtains the actual running power Ps, the accumulated consumed electric energy Ws and the actual water supply temperature Tgs of the heat pump through the heat pump variable-temperature water supply obtained by the power-electric energy meter (11), and the system controller (10) synchronously calculates the constant-temperature running power Ph and the constant-temperature accumulated consumed electric energy Wh of the heat pump running in a constant-temperature water supply mode according to the same heat generated under the variable-temperature running of the heat pump, and obtains the accumulated electricity-saving quantity delta W of the variable-temperature water supply relative to the constant-temperature water supply;
the system controller (10) uploads the acquired data of the outdoor environment temperature Tw, the actual water supply temperature Tgs, the actual room temperature Tns, the set room temperature Tnd, the on-off time of the compressor (2), the on-off time of the circulating water pump (6), the actual heat pump variable-temperature water supply operating power Ps, the accumulated consumed electric energy Ws, the constant-temperature heat pump operating power Ph, the constant-temperature accumulated consumed electric energy Wh and the accumulated electricity-saving quantity delta W to a third party platform through a WiFi module (12) for energy hosting service and heat pump fault pre-diagnosis.
3. The control method of a heat pump hot water system with internet transmission, diagnosis and management functions as claimed in claim 2, wherein:
the method for determining the required theoretical water supply temperature T' gs comprises the following steps: setting outdoor environment temperature T ' w to-15 ℃, room setting temperature T ' ns to 20 ℃ and a constant-temperature water supply mode setting water supply temperature T's to 45 ℃ as design criteria, wherein the theoretical water supply temperature T's is changed with the outdoor environment temperature Tw and the room setting temperature T's to T ' gs =0.5 (T ' ns-Tw) + 27.5.
4. The control method of a heat pump hot water system with internet transmission, diagnosis and management functions as claimed in claim 1, wherein:
when the water supply temperature Tgs of the constant-temperature water supply mode is 45 ℃, the specific calculation methods of the constant-temperature operation power Ph, the constant-temperature accumulated consumed electric energy Wh and the accumulated electricity-saving quantity delta W are as follows:
（a）Ph= Ps·[( 45-Tw) / 318]/ [( Tgs-Tw) / (273+ Tgs)]；
(b) wh = Σ Ph · Δ t, Δ t takes 10s, and Ph is power data obtained by detecting 1 time every 10 s;
（c）ΔW= Wh-Ws。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595802.7A CN111692748A (en) | 2020-06-28 | 2020-06-28 | Heat pump hot water system with internet transmission, diagnosis and management functions and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595802.7A CN111692748A (en) | 2020-06-28 | 2020-06-28 | Heat pump hot water system with internet transmission, diagnosis and management functions and control method thereof |
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| Publication Number | Publication Date |
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| CN111692748A true CN111692748A (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010595802.7A Pending CN111692748A (en) | 2020-06-28 | 2020-06-28 | Heat pump hot water system with internet transmission, diagnosis and management functions and control method thereof |
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| CN (1) | CN111692748A (en) |
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- 2020-06-28 CN CN202010595802.7A patent/CN111692748A/en active Pending
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