CN113970122A - A kind of ground heating and hot water supply system and control method - Google Patents
A kind of ground heating and hot water supply system and control method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000008236 heating water Substances 0.000 claims abstract description 72
- 238000004891 communication Methods 0.000 claims description 31
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- 239000002699 waste material Substances 0.000 abstract description 6
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- 238000006243 chemical reaction Methods 0.000 description 6
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- 238000010586 diagram Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 1
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- 239000008400 supply water Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
- F24D3/082—Hot water storage tanks specially adapted therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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Abstract
本发明提供了一种地暖热水两联供系统及控制方法，所述地暖热水两联供系统包括热泵机组HP、供暖水泵P1、地暖水泵P2、电动三通阀MV1、电动二通阀MV2、热水水箱HWT、地暖换热装置WHE、地暖FLH、水箱换热装置WTC、第一温度传感器Twt、第二温度传感器Twi‑FLH，通过调整供暖水泵P1、地暖水泵P2的流速以及电动三通阀MV1、电动二通阀MV2的通断，使得地暖和生活用水都能够满足其不同的水温需求。本发明通过设置合理的系统结构及控制方法步骤，能够便捷、可靠、稳定的实现制取高水温生活热水及低水温地暖供热的工作方式，避免能量浪费，提高换热能量的利用率，保障用户的生活舒适度。
The present invention provides a combined ground heating and hot water supply system and a control method. The combined ground heating and hot water supply system includes a heat pump unit HP, a heating water pump P1, a ground heating water pump P2, an electric three-way valve MV1, and an electric two-way valve MV2 , hot water tank HWT, floor heating heat exchange device WHE, floor heating FLH, water tank heat exchange device WTC, first temperature sensor Twt, second temperature sensor Twi-FLH, by adjusting the flow rate of heating water pump P1, floor heating water pump P2 and electric tee The on-off of valve MV1 and electric two-way valve MV2 enables both floor heating and domestic water to meet their different water temperature needs. By setting a reasonable system structure and control method steps, the present invention can conveniently, reliably and stably realize the working mode of producing high-water temperature domestic hot water and low-water temperature floor heating, avoiding energy waste and improving the utilization rate of heat exchange energy. Guarantee the comfort of the user's life.
Description
Technical Field
The invention relates to the technical field of heat pump systems, in particular to a floor heating hot water dual-combined supply system and a control method.
Background
At present, a heat pump floor heating device and an air energy water heating device in China are basically two different devices which are independent from each other, a conventional heat pump floor heating device only provides heating, and a conventional heat pump water heating device only provides domestic hot water; the basic principles of the heat pump floor heating device and the heat pump water heating device are the same, but the heat pump floor heating device is in an idle state in summer and transition seasons, the heat pump water heating device is only used for generating domestic hot water, and the functions and the energy utilization rate of the equipment are not fully utilized.
Although the prior art discloses that heating and hot water heating are realized by one heat pump, in actual heating, users have different hot water demands: the domestic hot water of high temperature is used for bathing, and the hot water of low temperature is used for warm up the heat supply, and the temperature of demand is very different (warm up the temperature about 35 ℃ generally, and domestic hot water is more than 55 ℃), when these two kinds of temperatures demand simultaneously, need adjust different temperatures and satisfy its demand.
How to optimize and upgrade a heat pump system so as to meet the functional requirements of different temperatures of floor heating and hot water is a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention aims to provide a floor heating and hot water two-combined supply system and a control method, aiming at an application scenario that when two water temperatures of floor heating and hot water are required, different water temperatures are required to be adjusted to meet the requirements, and a heat pump host combines a first temperature sensor Twt for detecting the water tank temperature and a feedback temperature of a second temperature sensor Twi-FLH for detecting the floor heating temperature according to different end requirements (high water temperature hot water, low water temperature floor heating supply), and realizes the requirements of high water temperature of hot water and low water temperature of floor heating by controlling the switches of an electric three-way valve MV1 and an electric two-way valve MV2 and the variable frequency control of a floor heating water pump P2.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a floor heating and hot water two-combined supply system comprises a heat pump unit HP, a heating water pump P1, a floor heating water pump P2, an electric three-way valve MV1, an electric two-way valve MV2, a hot water tank HWT, a floor heating heat exchange device WHE and a floor heating FLH, wherein a tank heat exchange device WTC and a first temperature sensor Twt are arranged inside the hot water tank HWT, a second temperature sensor Twi-FLH is arranged on the floor heating coil of the FLH, the heating water pump P1, the floor heating water pump P2, the first temperature sensor Twt, the second temperature sensor Twi-FLH, an electric three-way valve MV1 and the electric two-way valve MV2 are controlled by the heat pump unit HP, a first communication port A of the electric three-way valve MV1 is communicated with the heating water pump P1, a second communication port B of the electric three-way valve MV1 is communicated with the tank heat exchange device WTC, a third communication port C of the electric three-way valve MV1 is arranged between the tank heat exchange device WTC and the floor heating heat exchange device WTC, the electric two-way valve MV2 is arranged between the tank heat exchange device WHE and the floor heating water pump WHE, when the electric three-way valve is in an ON state, the first communication port A is communicated with the second communication port B and is not communicated with the third communication port C; when the electric three-way valve is in the OFF state, the first communication port a communicates with the third communication port C and does not communicate with the second communication port B.
According to the floor heating hot water dual-combined supply system disclosed by the invention, dual heat supply of domestic hot water and floor heating hot water is realized through one set of heat pump device, the heat pump unit HP and the water tank heat exchange device WTC are preferentially subjected to heat exchange, the temperature of the domestic hot water is ensured, when the temperature of a floor heating pipe is too low, the heat can be independently exchanged for the floor heating heat exchange device WHE, the utilization rate of heat exchange energy is improved, meanwhile, the temperature of the domestic water and the temperature of the floor heating heat supply can both meet the living needs, and the living comfort level is improved.
Further, the ground heating water pump P2 is the frequency conversion water pump, and when ground heating coil heat supply temperature was lower, the frequency of ground heating water pump P2 promoted, and when ground heating coil heat supply temperature was higher, the frequency of ground heating water pump P2 reduced.
This setting is through setting up the ground heat pump P2 that will control discharge in the ground heating pipe into the frequency conversion water pump for the ground heating pipe heat supply can remain throughout at the comparatively comfortable temperature of human body, further improves the comfort level of life.
Further, the ground heating heat exchange device WHE is a plate type heat exchange device, and the water tank heat exchange device WTC is a coil type heat exchange device.
This setting has improved the efficiency of heat transfer, further improves the utilization ratio of heat energy, avoids the energy waste.
The invention also aims to disclose a floor heating hot water dual-combined supply control method, which is applied to the floor heating hot water dual-combined supply system and comprises the following working modes:
a hot water heating mode;
a floor heating mode;
and a hot water and floor heating heat supply mode.
Furthermore, when the local heating and hot water combined supply system selects the working condition of the hot water and ground heating heat supply mode, when the temperature inside the water tank detected by the first temperature sensor Twt is less than the set temperature T of the water tankWater tank setting-T1When the heat pump unit HP is running, the electric three-way valve MV1 is in an ON state; the electric two-way valve MV2 is powered on, the heating water pump P1 and the floor heating water pump P2 run, and when the temperature inside the water tank detected by the first temperature sensor Twt is higher than the set temperature T of the water tankWater tank setting+T2At this time, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
Furthermore, when the working condition of the local heating and hot water dual-combined supply system selecting the mode to select the hot water heating mode is adopted, the working condition can be selectedThe internal temperature of the water tank detected by the first temperature sensor Twt is less than the set temperature T of the water tankWater tank setting-T3When the heat pump unit HP is running, the electric three-way valve MV1 is in an ON state; the electric two-way valve MV2 is closed when power is lost; the heating water pump P1 operates, the heating water pump P2 does not operate, and when the temperature inside the water tank detected by the first temperature sensor Ttw is higher than the set temperature T of the water tankWater tank setting+T4At this time, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
Further, when the working condition of the floor heating heat supply mode is selected by the selection mode of the floor heating and hot water dual-combined supply system, when the detection temperature of the second temperature sensor Twi-FLH is less than the floor heating set temperature TFloor heating setting+T5When the heat pump unit HP is running, the electric three-way valve MV1 is in an OFF state; the electric two-way valve MV2 is powered on and opened; the heating water pump P1 and the floor heating water pump P2 operate, and when the detection temperature of the second temperature sensor Twi-FLH is greater than the floor heating set temperature TFloor heating setting+T6At this time, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
According to the floor heating hot water dual-combined supply control method, based on the floor heating hot water dual-combined supply system disclosed by the invention, the control programs of the floor heating hot water dual-combined supply system under different working conditions are set, so that the purposes of preparing domestic hot water with high water temperature and supplying heat at low temperature of a floor heating can be realized, and the heat utilization rate and the comfort level of the floor heating hot water dual-combined supply system when people use the floor heating hot water dual-combined supply system are improved.
Further, T1、T2、T3、T4、T5、T6For a preset temperature value set empirically, T1The value range of (A) is 0.5-5 ℃, T2The value range of (A) is 0.5-5 ℃, T3The value range of (A) is 0.5-5 ℃, T4The value range of (A) is 0.5-5 ℃, T5The value range of (A) is 5-15 ℃, T6The value range of (A) is 1-5 ℃.
Through the optimal design to setting for the temperature parameter, this setting had both guaranteed domestic water's temperature and the heating temperature of heating pipe, and the target of the hot water high water temperature hot water of living and the low water temperature heat supply of ground warm is realized simultaneously to accurate, reliable realization preparation, has improved the comfort level of life, avoids heat transfer energy's waste again, improves energy utilization.
Further, floor heating water pump P2 is the frequency conversion water pump, and its frequency control carries out according to following control mode:
setting the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature TFloor heating settingIs Δ T, i.e. Δ T ═ TTwi-FLH-TFloor heating setting；
Input duty ratio F of floor heating water pump P2-last input duty ratio FOn the upper part+△F；
Δ F and Δ T are controlled according to the following relationship:
when a is more than or equal to Delta T and less than or equal to b, Delta F is 0;
when DeltaT is less than a, DeltaF is less than 0;
when DeltaT is more than b, DeltaF is more than 0;
wherein, a is less than 0 ℃, and b is more than 0 ℃.
The floor heating water pump P2 is arranged between the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature TFloor heating settingWhen the temperature difference is a negative value, the input duty ratio F of the floor heating water pump P2 is increased, the heating temperature of the floor heating pipe is increased, and the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature T are measuredFloor heating settingWhen the difference in temperature be the positive value, reduce the input duty cycle F of ground heating water pump P2, avoid the heating temperature of ground heating pipe to last too fast increase, make it maintain at comparatively comfortable heating temperature.
Furthermore, in the interval of delta T < a, the interval is divided into at least two sections, and the lower the temperature value of the section corresponding to delta T is, the smaller the value of delta F is; and in the interval of more than delta T and b, the interval is divided into at least two sections, and the higher the temperature value of the section corresponding to delta T is, the larger the value of delta F is.
Through the frequency conversion control logic of the floor heating water pump P2, under the floor heating mode or the hot water + floor heating mode, the floor heating water temperature is kept at a lower temperature value by controlling the flow of the floor heating water pump, so that the floor heating system can be used for floor heating, the utilization rate of heat is improved, and the comfort level of heating when the floor heating hot water dual-combined supply system is used by people is guaranteed.
Compared with the prior art, the floor heating hot water dual-combined supply system and the control method have the following advantages:
(1) according to the floor heating hot water two-combined supply system, the floor heating heat exchange device WHE is arranged at the rear end of the water tank heat exchange device WTC, the floor heating heat exchange device WHE and the water tank heat exchange device WTC are communicated through the communication pipe and the third communication port C of the electric three-way valve MV1, and when the heat pump set HP supplies heat to the domestic hot water and the floor heating simultaneously or independently, the floor heating hot water and the floor heating can meet different water temperature requirements according to the change of the working states of the heating water pump P1, the floor heating water pump P2, the electric three-way valve MV1 and the electric two-way valve MV 2.
(2) According to the floor heating hot water dual-combined supply system and the control method, the reasonable system structure and the reasonable control method steps are arranged, so that the working modes of preparing high-water-temperature domestic hot water and supplying heat to the low-water-temperature floor heating can be conveniently, reliably and stably realized, the energy waste is avoided, the utilization rate of heat exchange energy is improved, and the living comfort level of a user is guaranteed.
(3) According to the floor heating hot water dual-combined supply system and the control method, when domestic hot water and floor heating are used simultaneously, the flow of the floor heating water pump is controlled to enable the temperature of the floor heating water to be kept at a low temperature value for the floor heating to use, so that the floor heating water is kept at a comfortable heating temperature, and the use comfort of a user is further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a floor heating hot water dual-supply system according to an embodiment of the invention;
fig. 2 is a schematic diagram of a relation between a rotating speed and an input duty ratio of a floor heating side variable frequency water pump of a floor heating hot water dual combined supply system according to an embodiment of the invention.
Detailed Description
In order to make the technical means, objectives and functions of the present invention easy to understand, embodiments of the present invention will be described in detail with reference to the specific drawings.
Example 1
As shown in FIG. 1, the invention discloses a floor heating and hot water two-way supplying system, which comprises a heat pump unit HP, a heating water pump P1, a floor heating water pump P2, an electric three-way valve MV1, an electric two-way valve MV2, a hot water tank HWT, a floor heating heat exchanger WHE and a floor heating FLH, wherein the hot water tank HWT is internally provided with a water tank heat exchanger WTC and a first temperature sensor Twt, a floor heating coil is provided with a second temperature sensor Twi-FLH, the heating water pump P1, the floor heating water pump P2, the first temperature sensor Twt, the second temperature sensor Twi-FLH, an electric three-way valve MV1 and an electric two-way valve MV2 which are controlled by the heat pump unit HP, wherein a first communication port A of the electric three-way valve MV1 is communicated with the heating water pump P1, a second communication port B of the electric three-way valve MV1 is communicated with the water tank heat exchanger WTC, a third communication port C of the electric three-way valve MV1 is arranged between the floor heating water tank heat exchanger WTC and the floor heating water pump WHE, the electric two-way valve MV2 is arranged between a ground heating heat exchange device WHE and a ground heating FLH, and when the electric three-way valve is in an ON state, a first communication port A is communicated with a second communication port B and is not communicated with a third communication port C; when the electric three-way valve is in the OFF state, the first communication port a communicates with the third communication port C and does not communicate with the second communication port B.
The invention discloses a floor heating hot water dual-combined supply system, because the temperature required in a floor heating pipe is generally lower than the temperature of domestic water, a floor heating heat exchange device WHE is arranged at the rear end of a water tank heat exchange device WTC, and is communicated with a third communication port C of an electric three-way valve MV1 through a communication pipe, through an electric three-way valve MV1, when the electric three-way valve MV1 is in an ON state, the heat pump unit HP and the water tank heat exchange device WTC as well as the heat pump unit HP and the floor heating heat exchange device WHE can exchange heat simultaneously, when the electric three-way valve MV1 is in an OFF state, the heat pump unit HP only supplies heat to the floor heating heat exchange device WHE independently, and the water temperature in a floor heating FLH is improved.
According to the floor heating hot water dual-combined supply system disclosed by the invention, dual heat supply of domestic hot water and floor heating hot water is realized through one set of heat pump device, the heat pump and the water tank heat exchange device WTC are preferentially subjected to heat exchange, the temperature of the domestic hot water is ensured, when the temperature of a floor heating pipe is too low, the heat exchange can be independently carried out on the floor heating heat exchange device WHE, the utilization rate of heat exchange energy is improved, meanwhile, the temperature of the domestic water and the temperature of the floor heating heat supply can both meet the living needs, and the living comfort level is improved.
As a preferred example of the present invention, the heating water pump P1 is a constant frequency water pump, the floor heating water pump P2 is a variable frequency water pump, when the floor heating pipe heating temperature is low, the frequency of the floor heating water pump P2 is increased, and when the floor heating pipe heating temperature is high, the frequency of the floor heating water pump P2 is decreased.
This setting is through setting up the ground heat pump P2 that will control discharge in the ground heating pipe into the frequency conversion water pump for the ground heating pipe heat supply can remain throughout at the comparatively comfortable temperature of human body, further improves the comfort level of life.
As a preferred example of the present invention, the ground heating heat exchanger WHE is a plate heat exchanger, and the water tank heat exchanger WTC is a coil heat exchanger.
Because water tank heat transfer device WTC sets up inside hot water tank HWT, can be abundant, quick realization heat transfer coil and the heat transfer of the inside rivers of hot water tank HWT through the heat transfer coil who sets up, and ground warms up heat transfer device WHE and will carry out the heat absorption heat-retaining to the heat transfer medium of the terminal outflow of water tank heat transfer device WTC on the one hand, still need to heat the heat dissipation of conducting heat to the heat supply water pipe among the ground heating FLH simultaneously, guarantee the reliability of heat transfer.
This setting has improved the efficiency of heat transfer, further improves the utilization ratio of heat energy, avoids the energy waste.
Example 2
As shown in fig. 1-2, the invention also discloses a floor heating hot water dual-combined supply control method, which is applied to the floor heating hot water dual-combined supply system in the embodiment 1, and comprises the following working modes:
a hot water heating mode;
a floor heating mode;
and a hot water and floor heating heat supply mode.
When the floor heating hot water two-combined supply system selects hot waterWhen the working condition of the heating mode is + ground, the temperature inside the water tank detected by the first temperature sensor Twt is lower than the set temperature T of the water tankWater tank setting-T1When the heat pump unit HP is running, the electric three-way valve MV1 is in an ON state; the electric two-way valve MV2 is powered on, the heating water pump P1 and the floor heating water pump P2 run, and when the temperature inside the water tank detected by the first temperature sensor Twt is higher than the set temperature T of the water tankWater tank setting+T2At this time, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
When the floor heating hot water dual-combined supply system selects the working condition that the mode selects the hot water heating mode, the temperature inside the water tank detected by the first temperature sensor Twt is less than the set temperature T of the water tankWater tank setting-T3When the heat pump unit HP is running, the electric three-way valve MV1 is in an ON state; the electric two-way valve MV2 is closed when power is lost; the heating water pump P1 operates, the heating water pump P2 does not operate, and when the temperature inside the water tank detected by the first temperature sensor Ttw is higher than the set temperature T of the water tankWater tank setting+T4At this time, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
When the floor heating hot water dual-combined supply system selects the working condition of the floor heating mode, when the detection temperature of the second temperature sensor Twi-FLH is less than the floor heating set temperature TFloor heating setting+T5When the heat pump unit HP is running, the electric three-way valve MV1 is in an OFF state; the electric two-way valve MV2 is powered on and opened; the heating water pump P1 and the floor heating water pump P2 operate, and when the detection temperature of the second temperature sensor Twi-FLH is greater than the floor heating set temperature TFloor heating setting+T6At this time, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
The floor heating hot water dual-combined supply control method is based on the floor heating hot water dual-combined supply system in the embodiment 1, and can realize the purposes of preparing domestic hot water with high water temperature and supplying heat with low temperature of the floor heating by setting the control programs of the floor heating hot water dual-combined supply system under different working conditions, thereby improving the utilization rate of heat and the comfort level of people using the floor heating hot water dual-combined supply system.
As a preferred example of the present invention, T1、T2、T3、T4、T5、T6For a preset temperature value set empirically, T1The value range of (A) is 0.5-5 ℃, T2The value range of (A) is 0.5-5 ℃, T3The value range of (A) is 0.5-5 ℃, T4The value range of (A) is 0.5-5 ℃, T5The value range of (A) is 5-15 ℃, T6The value range of (A) is 1-5 ℃. Preferably, T is1Taking at 1 ℃, T2Taking at 1 ℃, T3Taking at 1 ℃, T4Taking at 1 ℃, T5Taking at 10 ℃ T6The temperature was taken at 2 ℃.
This setting had both guaranteed domestic water's temperature and the heat supply temperature of heating pipe, and the target of the hot water high water temperature hot water of domestic hot water and the low water temperature heat supply of ground warm is realized simultaneously to accurate, reliable realization, has improved the comfort level of life, avoids heat transfer energy's waste again, improves energy utilization.
As an example of the present invention, the temperature inside the water tank detected by the first temperature sensor Twt may be detected in real time or periodically, and the duration of the detection period is set empirically.
As an example of the present invention, the temperature of the FLH floor heating coil detected by the second temperature sensor tw-FLH may be detected in real time, or may be detected periodically, and the duration of the detection period is set according to experience.
As a preferred example of the present invention, the floor heating water pump P2 is a variable frequency water pump, and the frequency control is performed according to the following control method:
setting the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature TFloor heating settingIs Δ T, i.e. Δ T ═ TTwi-FLH-TFloor heating setting；
Input duty ratio F of floor heating water pump P2-last input duty ratio FOn the upper part+△F；
Δ F and Δ T are controlled according to the following relationship:
when a is more than or equal to Delta T and less than or equal to b, Delta F is 0;
when DeltaT is less than a, DeltaF is less than 0;
when DeltaT is more than b, DeltaF is more than 0;
wherein, a is less than 0 ℃, and b is more than 0 ℃.
The floor heating water pump P2 is arranged between the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature TFloor heating settingWhen the temperature difference is a negative value, the input duty ratio F of the floor heating water pump P2 is increased, the heating temperature of the floor heating pipe is increased, and the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature T are measuredFloor heating settingWhen the difference in temperature be the positive value, reduce the input duty cycle F of ground heating water pump P2, avoid the heating temperature of ground heating pipe to last too fast increase, make it maintain at comparatively comfortable heating temperature.
According to empirical examples, a ranges from-05 ℃ to-2 ℃ and b ranges from 05 ℃ to 2 ℃, preferably, a is-1 ℃, b is 1 ℃, that is, when Δ T is equal to or greater than-1 and is equal to or less than 1, Δ F is equal to 0.
As a preferred example of the invention, in the interval of DeltaT < a, the interval is divided into at least two sections, and the lower the temperature value of the corresponding DeltaT of the sections is, the smaller the value of the DeltaF is; and in the interval of more than delta T and b, the interval is divided into at least two sections, and the lower the temperature value of the section corresponding to delta T is, the larger the value of delta F is.
As a preferred example of the present invention, Δ T and Δ F are in the following table:
through the frequency conversion control logic of the floor heating water pump P2, under the floor heating mode or the hot water + floor heating mode, the floor heating water temperature is kept at a lower temperature value by controlling the flow of the floor heating water pump, so that the floor heating system can be used for floor heating, the utilization rate of heat is improved, and the comfort level of heating when the floor heating hot water dual-combined supply system is used by people is guaranteed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
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| CN113970122B (en) | 2023-03-31 |
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