CN113970122B - Floor heating hot water dual-combined supply system and control method - Google Patents
Floor heating hot water dual-combined supply system and control method Download PDFInfo
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- CN113970122B CN113970122B CN202111411147.6A CN202111411147A CN113970122B CN 113970122 B CN113970122 B CN 113970122B CN 202111411147 A CN202111411147 A CN 202111411147A CN 113970122 B CN113970122 B CN 113970122B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 192
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000008236 heating water Substances 0.000 claims abstract description 78
- 238000004891 communication Methods 0.000 claims description 23
- 238000012546 transfer Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 16
- OIGNJSKKLXVSLS-VWUMJDOOSA-N prednisolone Chemical compound O=C1C=C[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 OIGNJSKKLXVSLS-VWUMJDOOSA-N 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 claims description 6
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- 239000002699 waste material Substances 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 2
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- 230000017525 heat dissipation Effects 0.000 description 1
- 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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- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention provides a floor heating and hot water dual-combined supply system and a control method thereof, wherein the floor heating and hot water dual-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, a floor heating FLH, a water tank heat exchange device WTC, a first temperature sensor Twt and a second temperature sensor Twi-FLH, and the floor heating and domestic water can meet different water temperature requirements by adjusting the flow rates of the heating water pump P1 and the floor heating water pump P2 and the on-off of the electric three-way valve MV1 and the electric two-way valve MV 2. By arranging a reasonable system structure and control method steps, the working modes of preparing high-water-temperature domestic hot water and low-water-temperature floor heating for supplying heat can be conveniently, reliably and stably realized, energy waste is avoided, the utilization rate of heat exchange energy is improved, and the living comfort level of a user is guaranteed.
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 principle of the heat pump floor heating device is the same, but the heat pump floor heating device is in an idle state in summer and transition seasons, the heat pump hot water device is only used for producing domestic hot water, and the functions and the energy utilization rate of 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 requirements: 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 ground heating and hot water is a technical problem to be urgently solved 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 switches of an electric three-way valve MV1 and an electric two-way valve MV2 and frequency conversion 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 the water tank heat exchange device WTC and the first temperature sensor Twt are arranged inside the hot water tank HWT, the FLH floor heating coil is provided with second temperature sensors Twi-FLH, the heating water pump P1, the floor heating water pump P2, the first temperature sensor Twt, the second temperature sensors Twi-FLH, the 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 water tank heat exchange device WTC, a third communication port C of the electric three-way valve MV1 is arranged between the water tank heat exchange device WTC and the floor heating heat exchange device WHE, and the electric two-way valve MV2 is arranged between the floor heating heat exchange device WTC and the floor heating heat exchange device WHE, and the electric three-way valve MV A are not communicated with the water pump W; 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, ground warm water pump P2 is the frequency conversion water pump, and when ground heating coil heat supply temperature was lower, ground warm water pump P2's frequency promoted, and when ground heating coil heat supply temperature was higher, ground warm water pump P2's frequency reduced.
This setting is through setting up the ground heat pump P2 that will control discharge in the ground heating pipe to the frequency conversion water pump for ground heating pipe heat supply can keep at the comparatively comfortable temperature of human body throughout, further improves the comfort level of life.
Furthermore, ground heat exchanger WHE is plate heat exchanger, water tank heat exchanger WTC is coiled pipe formula heat exchanger.
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 tank Water tank setting -T 1 When 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 and opened, 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 tank Water tank setting +T 2 In this case, 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, when the temperature inside the water tank detected by the first temperature sensor Twt is lower than the set temperature T of the water tank Water tank setting -T 3 When 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 is operated, the floor heating water pump P2 is not operated, and when the temperature inside the water tank detected by the first temperature sensor Twt is greater than the set temperature T of the water tank Water tank setting +T 4 In this case, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
Furthermore, when the working condition that the floor heating heat supply mode is selected by the floor heating and hot water dual-supply system selection mode, the detection temperature of the second temperature sensor Twi-FLH is less than the floor heating set temperature T Floor heating setting +T 5 When 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 higher than the floor heating set temperatureT Floor heating setting +T 6 In this case, 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, T 1 、T 2 、T 3 、T 4 、T 5 、T 6 For a preset temperature value set empirically, T 1 The value range of (A) is 0.5-5 ℃, T 2 The value range of (A) is 0.5-5 ℃, T 3 The value range of (A) is 0.5-5 ℃, T 4 The value range of (A) is 0.5-5 ℃, T 5 The value range of (A) is 5-15 ℃, T 6 The 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, ground 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 T Floor heating setting Is Δ T, i.e. Δ T = T Twi-FLH -T Floor heating setting ；
Input duty ratio F = last input duty ratio F of ground heating water pump P2 Upper part of +△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 =0;
when DeltaT is less than a, deltaF is less than 0;
when DeltaT is greater than b, deltaF is greater than 0;
wherein, a is less than 0 ℃, and b is more than 0 ℃.
The floor heating water pump P2 is arranged at the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature T Floor heating setting When 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 measured Floor heating setting When 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 coil to last too fast increase, make it maintain 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 ground heating water pump P2, under the heat supply mode or hot water + ground heating mode, the flow of the ground heating water pump is controlled to enable the ground heating water temperature to maintain a lower temperature value, so that the ground heating water pump can be used for ground heating, the heat utilization rate is improved, and the comfort level of heating when a ground 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 and 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 third communication port C of the electric three-way valve MV1 through the communication pipe, and when the heat pump set HP supplies heat to domestic hot water and floor heating simultaneously or independently, the floor heating water pump P1, the floor heating water pump P2, the electric three-way valve MV1 and the electric two-way valve MV2 are changed in working states, so that the floor heating and the domestic water can meet different water temperature requirements.
(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 included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation of 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 supply system, which comprises a heat pump unit (HP), a heating water pump (P1), a floor heating water pump (P2), an electric three-way valve (MV 1), an electric two-way valve (MV 2), 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), the FLH 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), the electric three-way valve (MV 1) and the electric two-way valve (MV 2) are controlled by the heat pump unit (HP), the first communication port A of the electric three-way valve (MV 1) is communicated with the heating water pump (P1), the second communication port B of the electric three-way valve (MV 1) is communicated with the water tank heat exchanger (WTC), the third communication port C of the electric three-way valve (MV) is arranged between the water tank heat exchanger (WTC) and the floor heating water tank heat exchanger (WTC), the electric two-way valve (MV 2) is arranged between the water tank heat exchanger (MV) and the floor heating water pump (WTC), and the electric two-way valve (MV) are arranged in a) and the state, and the electric two-way valve (MV 2) is in the state, when the electric three-way valve (MV) is in the state, and the state, the electric three-way valve (MV A) is not communicated with the floor heating water pump (MV) and the floor heating water tank heat exchanger (WTC); 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 the arranged electric three-way valve MV1, when the electric three-way valve MV1 is in an ON state, simultaneous heat exchange between a heat pump unit HP and the water tank heat exchange device WTC and between the heat pump unit HP and the floor heating heat exchange device WHE is realized, 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 fixed-frequency water pump, the ground heating water pump P2 is a variable-frequency water pump, when the heating temperature of the ground heating pipe is low, the frequency of the ground heating water pump P2 is increased, and when the heating temperature of the ground heating pipe is high, the frequency of the ground 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 to the frequency conversion water pump for ground heating pipe heat supply can keep at the comparatively comfortable temperature of human body throughout, 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 through the heat transfer coil who sets up, quick realization heat transfer coil and the heat transfer of the inside rivers of hot water tank HWT, and warm up heat transfer device WHE and will carry out the heat absorption heat-retaining to the terminal heat transfer medium that flows of water tank heat transfer device WTC on the one hand, still will conduct heat the heat dissipation to the heat supply water pipe among the FLH that warms up 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 to 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 described in 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 dual-combined supply system selects the working condition of the hot water and floor heating heat supply mode, the temperature inside the water tank detected by the first temperature sensor Twt is less than the set temperature T of the water tank Water tank setting -T 1 When 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 and opened, 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 tank Water tank setting +T 2 In this case, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
When the working condition that the floor heating hot water dual-combined supply system selects the hot water heating mode, the temperature inside the water tank detected by the first temperature sensor Twt is lower than the set temperature T of the water tank Water tank setting -T 3 When 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 is operated, the floor heating water pump P2 is not operated, and when the first temperature sensor Ttw detectsThe internal temperature of the water tank is more than the set temperature T of the water tank Water tank setting +T 4 When the heat pump unit HP stops operating, the electric three-way valve MV1 is in an 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 T Floor heating setting +T 5 When 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 T Floor heating setting +T 6 In this case, 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 a floor heating by setting 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, T 1 、T 2 、T 3 、T 4 、T 5 、T 6 A preset temperature value, T, set empirically 1 The value range of (A) is 0.5-5 ℃, T 2 The value range of (A) is 0.5-5 ℃, T 3 The value range of (A) is 0.5-5 ℃, T 4 The value range of (A) is 0.5-5 ℃, T 5 The value range of (A) is 5-15 ℃, T 6 The value range of (A) is 1-5 ℃. Preferably, T is 1 Taking at 1 ℃, T 2 Taking at 1 ℃, T 3 Taking at 1 ℃, T 4 Taking at 1 ℃, T 5 Taking at 10 ℃ T 6 The 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 internal temperature of the water tank detected by the first temperature sensor Twt may be real-time temperature detection, or may be temperature detection performed periodically, and the duration of the detection period is set according to experience.
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 manner:
setting the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature T Floor heating setting Is Δ T, i.e. Δ T = T Twi-FLH -T Floor heating setting ；
Input duty ratio F = last input duty ratio F of ground heating water pump P2 On the upper part +△F；
Δ F and Δ T are controlled in accordance with the following relationship:
when a is more than or equal to delta T and less than or equal to b, delta F =0;
when DeltaT is less than a, deltaF is less than 0;
when DeltaT is greater than b, deltaF is greater than 0;
wherein, a is less than 0 ℃, and b is more than 0 ℃.
The floor heating water pump P2 is arranged at the detection temperature of the second temperature sensor Twi-FLH and the floor heating set temperature T Floor heating setting When 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 measured Floor heating setting When 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 coil to last too fast increase, make it maintain at comparatively comfortable heating temperature.
According to the empirical example, the value range of a is-05 ℃ to-2 ℃, the value range of b is 05 ℃ to 2 ℃, preferably, a is-1 ℃, b is 1 ℃, namely when the Delta T is more than or equal to-1 and less than or equal to 1, the Delta F =0.
As a preferred example of the present invention, in the interval of Δ T < a, the interval is divided into at least two sections, and the lower the temperature value of Δ T, the smaller the value of Δ F; 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 ground heating water pump P2, under the heating mode of ground heating or the heating mode of hot water + ground heating, the flow of the ground heating water pump is controlled to maintain the ground heating water temperature at a lower temperature value for use in ground heating, so that the utilization rate of heat is improved, and the comfort level of heating when a ground heating hot water dual-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 (7)
1. A floor heating and hot water two-combined supply system is characterized by comprising 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 the hot water tank HWT is internally provided with a tank heat exchange device WTC and a first temperature sensor Twt, the FLH 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, the 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 water pump unit WHE, and the electric two-way valve MV2 is arranged between the floor heating water pump unit WHE and the floor heating water pump P1, and the floor heating water tank heat exchange device WTC is in an ON state, and the first communication port B is not communicated with the electric three-way valve MV B; when the electric three-way valve is in an OFF state, the first communication port A is communicated with the third communication port C and is not communicated with the second communication port B;
the floor heating hot water dual-combined supply system executes the following floor heating hot water dual-combined supply control method, and comprises the following working modes:
a hot water heating mode, a floor heating mode and a hot water + floor heating mode; in a floor heating mode or a hot water and floor heating mode, the heating water pump P1 and the floor heating water pump P2 operate;
ground heat 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 T Floor heating setting Is Δ T, i.e. Δ T = T Twi-FLH -T Floor heating setting ；
Input duty ratio F = last input duty ratio F of ground heating water pump P2 On 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 =0;
when DeltaT is less than a, deltaF is less than 0;
when DeltaT is greater than b, deltaF is greater than 0;
wherein a is less than 0 ℃, and b is more than 0 ℃;
the temperature value of the section corresponding to the delta T is lower, and the value of the delta F is smaller; in the interval of delta T being more than b, the interval is divided into at least two sections, the higher the temperature value of the section corresponding to delta T is, the larger the value of delta F is;
the temperature that needs in the ground heating pipe is less than domestic water's temperature, heat transfer device WHE sets up the rear end at water tank heat transfer device WTC to through setting up the third intercommunication mouth C intercommunication of communicating pipe and electric three-way valve MV1 between the two, through the electric three-way valve MV1 that sets up, when electric three-way valve MV1 is in the ON state, realize heat pump set HP and water tank heat transfer device WTC and heat pump set HP and ground heat transfer device WHE's while heat transfer, when electric three-way valve MV1 is in the OFF state, heat pump set HP only supplies heat to ground heat transfer device WHE alone.
2. The system for supplying floor heating water and hot water in two ways according to claim 1, wherein when the heating temperature of the floor heating pipe is low, the frequency of the floor heating water pump P2 is increased, and when the heating temperature of the floor heating pipe is high, the frequency of the floor heating water pump P2 is decreased.
3. The floor heating hot water cogeneration system according to claim 2, wherein the floor heating heat exchanger WHE is a plate heat exchanger, and the water tank heat exchanger WTC is a coil heat exchanger.
4. The system for supplying floor heating and hot water in combination as claimed in claim 1, wherein when the system for supplying floor heating and hot water in combination selects the working condition of the hot water + floor heating mode, the temperature inside the water tank detected by the first temperature sensor Twt is lower than the set temperature T of the water tank Water tank setting -T 1 When 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 tank Water tank setting +T 2 In this case, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
5. The floor heating and hot water cogeneration system according to claim 1, wherein when the floor heating and hot water cogeneration system selects the operation mode of the hot water heating mode from the mode selection, the temperature inside the water tank detected by the first temperature sensor Twt is lower than the set temperature T of the water tank Water tank setting -T 3 When 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 is operated, the floor heating water pump P2 is not operated, and when the temperature inside the water tank detected by the first temperature sensor Twt is greater than the set temperature T of the water tank Water tank setting +T 4 When the temperature of the water is higher than the set temperature,the heat pump unit HP stops operating and the electric three-way valve MV1 is in the OFF state.
6. The floor heating hot water dual supply system according to claim 1, wherein when the floor heating mode is selected as the selection mode of the floor heating hot water dual supply system, the detected temperature of the second temperature sensor Twi-FLH is less than the floor heating set temperature T Floor heating setting +T 5 When 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; 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 T Floor heating setting +T 6 In this case, the heat pump unit HP stops operating, and the electric three-way valve MV1 is in the OFF state.
7. Floor heating hot water dual supply system according to claim 4, 5 or 6, characterized in that T 1 、T 2 、T 3 、T 4 、T 5 、T 6 For a preset temperature value set empirically, T 1 The value range of (A) is 0.5 to 5 ℃, T 2 The value range of (A) is 0.5 to 5 ℃, T 3 The value range of (A) is 0.5 to 5 ℃, T 4 The value range of (A) is 0.5 to 5 ℃, T 5 The value range of (1) is 5 to 15 ℃, T 6 The value range of (a) is 1 to 5 ℃.
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| WO2024192962A1 (en) * | 2023-03-21 | 2024-09-26 | 青岛海信日立空调系统有限公司 | Heat pump system and control method therefor |
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