CN111649451A - Two-combined-supply system and control method thereof - Google Patents

Two-combined-supply system and control method thereof Download PDF

Info

Publication number
CN111649451A
CN111649451A CN202010392579.6A CN202010392579A CN111649451A CN 111649451 A CN111649451 A CN 111649451A CN 202010392579 A CN202010392579 A CN 202010392579A CN 111649451 A CN111649451 A CN 111649451A
Authority
CN
China
Prior art keywords
water
pipe
floor heating
electric heater
water supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010392579.6A
Other languages
Chinese (zh)
Inventor
余超群
陈华
刘合心
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
Original Assignee
Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Aux Electric Co Ltd, Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd filed Critical Ningbo Aux Electric Co Ltd
Priority to CN202010392579.6A priority Critical patent/CN111649451A/en
Publication of CN111649451A publication Critical patent/CN111649451A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • 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
    • F24D13/00—Electric heating systems
    • F24D13/04—Electric heating systems using electric heating of heat-transfer fluid in separate units of the system
    • 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
    • F24D19/0095—Devices for preventing damage by freezing
    • 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
    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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

Abstract

The invention discloses a two-combined-supply system and a control method thereof, wherein the two-combined-supply system comprises an outdoor unit set, an indoor unit set and a floor heating module, the outdoor unit set is respectively connected with the indoor unit set and the floor heating module, the floor heating module comprises a floor heating circulation loop, and the floor heating circulation loop is formed by sequentially connecting a heat exchanger, a water supply pipe, a floor heating and a water return pipe; a water supply branch pipe connected with the floor heating in parallel is arranged between the water supply pipe and the water return pipe, and an electromagnetic valve is arranged on the water supply branch pipe. According to the invention, the water supply branch pipe connected in parallel with the floor heating is arranged between the water supply pipe and the water return pipe, so that water in the floor heating module can flow through the water supply branch pipe when the floor heating circulation loop is closed, the water pipe is prevented from being broken due to freezing caused by the reduction of the water temperature, and the operation reliability of the system is improved; meanwhile, the water feeding pipe is connected with the water return pipe through the water feeding branch pipe, so that low-temperature water can be prevented from flowing into the floor heating of a room, and the comfort of a user is improved.

Description

Two-combined-supply system and control method thereof
Technical Field
The invention relates to the technical field of air conditioners. In particular to a two-combined supply system and a control method thereof.
Background
Energy and environmental problems are always the focus problems on the development roads of China. Since the environmental pollution caused by primary performance source coal is not reversible, the coal-fired heating mode is gradually replaced. With the development of air conditioning technology, a central air conditioner is combined with a floor heating system, and a two-combined supply system of an air conditioner external unit and a heat exchange water pipe gradually enters the field of view of the public. Although the two-combined-supply system can solve the problems of heating in winter and refrigerating in summer, after the air conditioner is operated for a period of time for heating, the heat exchanger of the outdoor unit is easy to frost, a defrosting mode needs to be entered to melt frost on the heat exchanger of the outdoor unit, and the heating operation is carried out again after defrosting is finished. After the air conditioner enters a defrosting mode, the temperature of the indoor heat exchanger is reduced, water flowing through the indoor heat exchanger is cooled, heat cannot be provided for the floor heating module, the water temperature in a floor heating circulation loop is reduced, and a water pipe is easily frozen and cracked. Therefore, there is a need to optimize existing two-cogeneration systems.
Disclosure of Invention
The invention aims to provide a two-combined-supply system and a control method thereof, and aims to solve the technical problems that water in a water pipe in a floor heating module is frozen when an air conditioner is defrosted, the water pipe is easy to break, and low-temperature water enters a room to influence the comfort of a user.
In order to achieve the purpose, the invention adopts the following technical scheme,
a double combined supply system comprises an outdoor unit set, an indoor unit set and a floor heating module, wherein the outdoor unit set is respectively connected with the indoor unit set and the floor heating module, the floor heating module comprises a floor heating circulation loop, and the floor heating circulation loop is formed by sequentially connecting a heat exchanger, a water supply pipe, a floor heating pipe and a water return pipe; a water supply branch pipe connected with the floor heating in parallel is arranged between the water supply pipe and the water return pipe, and an electromagnetic valve is arranged on the water supply branch pipe.
According to the invention, the water supply branch pipe connected in parallel with the floor heating is arranged between the water supply pipe and the water return pipe, so that water in the floor heating module can flow through the water supply branch pipe when the floor heating circulation loop is closed, the water pipe is prevented from being broken due to freezing caused by the reduction of the water temperature, and the operation reliability of the system is improved; meanwhile, the water feeding pipe is connected with the water return pipe through the water feeding branch pipe, so that low-temperature water can be prevented from flowing into the floor heating of a room, and the comfort of a user is improved.
Further, the water supply branch pipe comprises a first end connected with the water supply pipe and a second end connected with the water return pipe; the water supply pipe is provided with an electric heater which is positioned between the heat exchanger and the first end of the water supply branch pipe.
According to the technical scheme of the embodiment, the electric heater is arranged at the outlet of the heat exchanger, so that water in the water feeding pipe can be heated when the water temperature in the water feeding pipe is too low, and the water pipe breakage caused by icing of the water with too low water temperature is further avoided.
Furthermore, a thermal valve is arranged on the water return pipe and is positioned between the second ends of the ground heating branch pipe and the water feeding branch pipe.
According to the technical scheme of the embodiment, the on-off of the floor heating circulation loop is controlled by the aid of the thermal valve, so that a user can conveniently select to turn on or turn off the floor heating according to needs.
Furthermore, an outlet of the heat exchanger is provided with an outlet water temperature sensor which is used for detecting the water temperature T at the outlet of the heat exchangero。
According to the technical scheme of the embodiment, the outlet of the heat exchanger is provided with the water outlet temperature sensor to detect the water temperature at the outlet of the heat exchanger, and the two combined supply systems can execute corresponding operation according to the water temperature at the outlet of the heat exchanger, so that the reasonable operation of the two combined supply systems is realized.
Furthermore, the two-combined-supply system also comprises a controller, and the controller is respectively connected with the electromagnetic valve, the electric heater, the hot valve and the water outlet temperature sensor.
According to the technical scheme of the embodiment, the system reaction time can be shortened, the system control efficiency is improved, and electrification control of the two-combined-supply system is realized.
The invention also provides a control method of the two-combined supply system, which comprises the following steps:
after the outdoor unit receives a defrosting instruction, the on-off state of the thermal valve is judged, and the water temperature T at the outlet of the heat exchanger is detectedo；
If the thermal valve is in an opening state, controlling the electromagnetic valve to keep a closing state;
if To≤T1Then turning on the electric heater;
if To＞T1Controlling the electric heater to stop operating;
wherein, T1Is a first predetermined temperature.
According to the control method of the two-combined-supply system, after the outdoor unit receives the defrosting instruction, if the thermal valve is in the opening state, the floor heating circulation loop is opened, and as the floor heating temperature of a room is higher, the floor heating can provide heat for water flowing through the floor heating, so that the water pipe is prevented from being broken due to freezing of the water; at To≤T1When the water supply device is used, the electric heater is turned on to heat water in the water supply pipe, so that the water temperature can be increased, and the problem that the comfort of a user is influenced due to the fact that the water temperature entering the floor heating is too low is avoided.
Further, if the thermal valve is in a closed state, the electromagnetic valve is opened;
if T2＜To≤T1Then turning on the electric heater;
if To≤T2Then the electric heater and the thermal valve are opened;
if To＞T1Then the electric heater is controlled to be stillMaking;
wherein, T1Is a first predetermined temperature, T2Is a second predetermined temperature, T1＞T2。
According to the technical scheme of the embodiment, if the thermal valve is in a closed state, the floor heating circulation loop is disconnected, and the electromagnetic valve is opened to enable the water supply pipe to be communicated with the water return pipe through the water supply branch pipe to form water circulation; at T2＜To≤T1When the water pipe is frozen, the electric heater is turned on to heat the water in the water supply pipe, so that the water pipe is prevented from being broken due to freezing of the water; at To≤T2When the water temperature in the water delivery pipe is too low, the electric heater is not enough to provide enough heat for the water in the water delivery pipe, so that the electric heater and the thermal valve are simultaneously opened, the water in the water delivery pipe enters the floor heating after being heated by the electric heater, the floor heating continuously provides heat for the water, and the water temperature is improved; at To＞T1In the process, the water temperature of the water supply pipe is higher, and the water pipe does not have the potential danger of frost crack, so that the electric heater is controlled not to act, and the energy consumption and the system operation cost of the two-combined-supply system are reduced.
Further, if To≤T2And then opening the electric heater and the thermal valve, further comprising:
and after the hot valve operates for the first operation time T, closing the electromagnetic valve.
According to the technical scheme of the embodiment, after the thermal valve runs T, the floor heating circulation loop is completely opened, the electromagnetic valve is closed at the moment, so that water in the water supply pipe flows to the water return pipe through the floor heating, namely, the water in the water pipe is completely secondarily heated, the water temperature is quickly increased, and the water pipe is prevented from being broken due to freezing of the water.
Further, the first operation time T ═ Ty(ii) a Wherein, TyThe duration of time required for the hot valve to open from closed.
According to the technical scheme of the embodiment, T is set to TyAnd after the thermal valve is completely opened, the electromagnetic valve is closed, so that the running reliability of the floor heating circulation loop can be ensured.
Further, the first preset temperature T1Preferably 10 ℃; and/or a second predetermined temperature T2Preferably 3 deg.c.
According to the solution of this embodiment, T1And T2Reasonable value taking can ensure the operation reliability of the two combined supply systems. In addition, T can be adjusted according to the working environment of the two-combined supply system, the electric heater and the floor heating operation parameters1And T2The numerical value of (c).
Drawings
FIG. 1 is a schematic structural diagram of a two-combined-supply system according to the present invention;
FIG. 2 is a flow chart of the two-cogeneration system of the present invention.
Description of reference numerals:
the system comprises an outdoor unit set, a 2-main gas pipe, a 3-main liquid pipe, a 4-electronic expansion valve, a 5-liquid pipe temperature sensor, a 6-heat exchanger, a 7-return water temperature sensor, an 8-saturation temperature sensor, a 9-gas pipe temperature sensor, a 10-water outlet temperature sensor, an 11-electric heater, a 12-electromagnetic valve, a 13-water pump, a 14-final water outlet temperature sensor, a 15-return water branch pipe, a 16-hot valve, a 17-water supply branch pipe, an 18-floor heating, a 19-indoor unit set, a 20-floor heating module, a 21-water supply branch pipe, a 22-return water pipe, a 23-gas pipe branch pipe, a 24-liquid pipe branch pipe and a 25-water supply pipe.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example one
The embodiment provides a two-combined-supply system, as shown in fig. 1, which includes an outdoor unit set 1, an indoor unit set 19 and a floor heating module 20, wherein the outdoor unit set 1 is respectively connected with the indoor unit set 19 and the floor heating module 20, the floor heating module 20 includes a floor heating circulation loop, and the floor heating circulation loop is formed by sequentially connecting a heat exchanger 6, a water supply pipe 25, a floor heating 18 and a water return pipe 22; a water supply branch pipe 21 connected with the floor heating 18 in parallel is arranged between the water supply pipe 25 and the water return pipe 22, and an electromagnetic valve 12 is arranged on the water supply branch pipe 21. According to the invention, the water supply branch pipe 21 connected with the floor heating module 18 in parallel is arranged between the water supply pipe 25 and the water return pipe 22, so that when the floor heating circulation loop is closed, water in the floor heating module 20 can flow through the water supply branch pipe 21, the water supply pipe 25, the water supply branch pipe 21, the water return pipe 22 and the heat exchanger 6 form a water circulation loop, the water pipe is prevented from being broken due to freezing caused by the reduction of water temperature, and the operation reliability of the system is improved; in addition, the water supply pipe 25 is connected with the water return pipe 22 through the water supply branch pipe 21, so that low-temperature water can be prevented from flowing into the floor heating 18 of a room, and the comfort of a user can be improved.
As shown in fig. 1, the two-combined-supply system of the embodiment includes an outdoor unit set 1, an indoor unit set 19, and a floor heating module 20, where the outdoor unit set 1 is connected to the indoor unit set 19 and the floor heating module 20 through a main air pipe 2 and a main liquid pipe 3. The floor heating module 20 comprises an air pipe branch pipe 23, a liquid pipe branch pipe 24, a heat exchanger 6, a water feeding pipe 25, a water return pipe 22 and a floor heating 18. During heating operation, one part of high-temperature and high-pressure gas discharged by the outdoor unit set 1 enters the indoor unit set 19 through the main gas pipe 2 to be heated, the other part of high-temperature and high-pressure gas enters the heat exchanger 6 through the gas pipe branch pipe 23, after heat release, the high-temperature and high-pressure gas flows back to the main liquid pipe 3 through the liquid pipe branch pipe 24, and the high-temperature and high-pressure gas and the liquid flowing back to the indoor unit set 19 are; the water in the water supply pipe 25 absorbs heat in the heat exchanger 6, flows through the floor heating 18 to release heat, and then flows back to the heat exchanger 6 through the water return pipe 22, so that a floor heating circulation loop is formed. Preferably, the air pipe branch 23 is further provided with an electronic expansion valve 4.
A water supply branch pipe 21 connected with the floor heating 18 in parallel is arranged between the water supply pipe 25 and the water return pipe 22, and a stop valve for controlling the on-off of the water supply branch pipe 21 is arranged on the water supply branch pipe 21, preferably, the stop valve is an electromagnetic valve 12. The water supply branch pipe 21 includes a first end for connection with the water supply pipe 25 and a second end connected with the water return pipe 22; the water supply pipe 25 is provided with an electric heater 11, and the electric heater 11 is positioned between the heat exchanger 6 and the first end of the water supply branch pipe 21. The water return pipe 22 is provided with a hot valve 16, and the hot valve 16 is positioned between the floor heating pipe 18 and the second end of the water supply branch pipe 21. The electric heater 11 is arranged at the outlet of the heat exchanger 6, so that water in the water supply pipe 25 can be heated when the water temperature in the water supply pipe 25 is too low, and the water pipe fracture caused by icing of the water with too low water temperature is further avoided. The heat valve 16 is arranged on the water return pipe 22 to control the on-off of the floor heating circulation loop, so that a user can conveniently select to open or close the floor heating 18 according to the requirement.
Preferably, the floor heating module 20 includes a plurality of floor heating units 18, a water supply branch pipe 17 is disposed between the water supply pipe 25 and the floor heating unit 18, and a water return branch pipe 15 is disposed between the floor heating unit 18 and the water return pipe 22. The water in the water supply pipe 25 can be divided by the water supply branch pipe 17 and distributed and conveyed to each branch of the floor heating 18, and the water in each branch of the floor heating 18 can be collected by the water return branch pipe 15 and then flows back to the water return pipe 22. Further preferably, each branch of floor heating 18 is provided with a hot-operated valve 16 to control the on-off of each branch of floor heating 18.
Preferably, the water pump 13 is disposed on the water supply pipe 25, and is used for pressurizing water in the floor heating module 20, so that the water in the floor heating module 20 flows in a circulating manner.
In the preferred embodiment, the outlet of the heat exchanger 6 is provided with an outlet water temperature sensor 10, and the outlet water temperature sensor 10 is used for detecting the water temperature T at the outlet of the heat exchanger 6o. An outlet water temperature sensor 10 is arranged at an outlet of the heat exchanger 6 to detect the water temperature at the outlet of the heat exchanger 6, and the two combined supply systems can execute corresponding operation according to the water temperature at the outlet of the heat exchanger 6, so that the reasonable operation of the two combined supply systems is realized. Further preferably, a final outlet water temperature sensor 14 is arranged on the water delivery pipe 25 at the inlet of the floor heating 18; a return water temperature sensor 7 is arranged on the return water pipe 22 at the inlet of the heat exchanger 6; the trachea branch pipe 23 is provided with a trachea temperature sensor 9; a liquid pipe temperature sensor 5 is arranged on the liquid pipe branch pipe 24; a saturation temperature sensor 8 is provided inside the heat exchanger 6.
Preferably, the two-combined-supply system further comprises a controller, and the controller is connected with the electromagnetic valve 12, the electric heater 11, the thermal valve 16, the water pump 13, the outlet water temperature sensor 10, the final outlet water temperature sensor 14, the return water temperature sensor 7, the air pipe temperature sensor 9, the liquid pipe temperature sensor 5 and the saturation temperature sensor 8 respectively. The controller is arranged to control each element in the two combined supply systems, so that the system reaction time can be shortened, the system control efficiency is improved, and the electrification control of the two combined supply systems is realized.
Example two
As shown in fig. 2, the present embodiment provides a method for controlling a two-combined-supply system, where the two-combined-supply system of the first embodiment is adopted, and the method includes:
after receiving the defrosting command, the outdoor unit judges the on-off state of the thermal valve 16, and detects the water temperature T at the outlet of the heat exchanger 6o；
If the thermal valve 16 is in an open state, controlling the electromagnetic valve 12 to keep a closed state;
if To≤T1Then the electric heater 11 is turned on;
if To＞T1If so, the electric heater 11 is controlled not to act;
wherein, T1Is a first predetermined temperature.
In the preferred embodiment, the temperature of the water T at the outlet of the heat exchanger 6 is detected by the outlet water temperature sensor 10oAnd sent to a controller which determines the temperature T of the water at the outlet of the heat exchanger 6oAnd the opening and closing state of the thermal valve 16, and controls the electromagnetic valve 12 and the electric heater 11 to perform corresponding actions.
According to the control method of the two-combined-supply system, after the outdoor unit receives the defrosting instruction, if the hot valve 16 is in the opening state, the floor heating circulation loop is opened, and as the temperature of the floor heating 18 is high, the floor heating 18 can provide heat for water flowing through the floor heating 18, so that the water pipe is prevented from being broken due to freezing of the water; at To≤T1During the time, the temperature of 6 exits in heat exchanger is lower, if directly flow to warm up 18, can make room warm up 18 temperature and reduce rapidly, influences user's travelling comfort, opens electric heater 11 and heats the water in the flow pipe 25, can promote the temperature, avoids low temperature water to get into and warm up 18 in and influence user's travelling comfort.
The control method of the embodiment further includes, if the thermal valve 16 is in the closed state, opening the electromagnetic valve 12;
if T2＜To≤T1Then the electric heater 11 is turned on;
if To≤T2Then the electric heater 11 and the thermal valve 16 are opened;
if To＞T1If so, the electric heater 11 is controlled not to act;
wherein, T1Is a first predetermined temperature, T2Is a second predetermined temperature, T1＞T2。
If the thermal valve 16 is in a closed state, the floor heating circulation loop is disconnected, and the electromagnetic valve 12 is opened to enable the water supply pipe 25 to be communicated with the water return pipe 22 through the water supply branch pipe 21 to form water circulation; at T2＜To≤T1When the water is frozen, the electric heater 11 is turned on to heat the water in the water delivery pipe 25, so that the water pipe is prevented from being broken due to freezing of the water; at To≤T2When the temperature of water in the water delivery pipe 25 is too low, the electric heater 11 is not enough to provide enough heat for the water in the water delivery pipe 25, so that the electric heater 11 and the thermal valve 16 are simultaneously opened, the water in the water delivery pipe 25 is heated by the electric heater 11 and then enters the floor heating 18, the floor heating 18 continues to provide heat for the water, and the water temperature is increased; at To＞T1In the process, the water temperature of the water supply pipe 25 is higher, and the water pipe does not have the potential danger of frost crack, so that the electric heater 11 is controlled not to act, and the energy consumption and the system operation cost of the two-combined-supply system are reduced.
T1And T2The value of the temperature difference can be selected according to the working environment of the two-combined-supply system and the operating parameters of the electric heater 11 and the floor heating 18. Preferably, the first preset temperature T is set in the present embodiment1At 10 deg.C, a second preset temperature T2Is 3 ℃. T is1And T2Reasonable value taking can ensure the operation reliability of the two combined supply systems.
In this embodiment, "if To≤T2And then the electric heater 11 and the thermal valve 16 ″ are opened, further comprising: after the hot valve 16 has been operated for a first operating time T, the solenoid valve 12 is closed.
After the hot valve 16 runs T, the floor heating circulation loop is opened, the electromagnetic valve 12 is closed at the moment, so that water in the water supply pipe 25 flows to the water return pipe 22 through the floor heating pipe 18 completely, namely, the water in the water pipe is heated secondarily completely, the water temperature is increased rapidly, and the water pipe is prevented from being broken due to freezing of the water.
In the present embodiment, the first operation time T ═ T is sety(ii) a Wherein, TyThe length of time required for the thermal valve 16 to open from closed. Setting T ═ TyThe solenoid valve 12 is closed after the thermal valve 16 is completely opened, thereby ensuringAnd the running reliability of the floor heating circulation loop is proved. T isyIs selected according to the model of the thermal valve 16. Preferred in this embodiment, TyIs 3 min.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A two-combined supply system comprises an outdoor unit set (1), an indoor unit set (19) and a floor heating module (20), wherein the outdoor unit set (1) is respectively connected with the indoor unit set (19) and the floor heating module (20),
the floor heating module (20) comprises a floor heating circulation loop, and the floor heating circulation loop is formed by sequentially connecting a heat exchanger (6), a water supply pipe (25), a floor heater (18) and a water return pipe (22); a water supply branch pipe (21) connected with the floor heating pipe (18) in parallel is arranged between the water supply pipe (25) and the water return pipe (22), and an electromagnetic valve (12) is arranged on the water supply branch pipe (21).
2. The two-up system according to claim 1,
the water supply branch pipe (21) comprises a first end connected with the water supply pipe (25) and a second end connected with the water return pipe (22); an electric heater (11) is arranged on the water delivery pipe (25), and the electric heater (11) is positioned between the heat exchanger (6) and the first end of the water delivery branch pipe (21).
3. The two-up system according to claim 2,
be provided with hot valve (16) on wet return (22), hot valve (16) are located warm up (18) with between the second end of sending water branch pipe (21).
4. The two-up system according to claim 3,
the heat exchangeAn outlet of the device (6) is provided with an outlet water temperature sensor (10), and the outlet water temperature sensor (10) is used for detecting the water temperature T at the outlet of the heat exchanger (6)o。
5. The two-up system according to claim 4,
the two-combined-supply system further comprises a controller, and the controller is connected with the electromagnetic valve (12), the electric heater (11), the thermal valve (16) and the outlet water temperature sensor (10) respectively.
6. A control method of the two-combined supply system according to any one of claims 3 to 5, comprising:
after the outdoor unit receives a defrosting instruction, the on-off state of the thermal valve (16) is judged, and the water temperature T at the outlet of the heat exchanger (6) is detectedo；
If the thermal valve (16) is in an opening state, controlling the electromagnetic valve (12) to keep a closing state;
if To≤T1Then turning on the electric heater (11);
if To＞T1If so, controlling the electric heater (11) not to act;
wherein, T1Is a first predetermined temperature.
7. The control method according to claim 6,
if the thermal valve (16) is in a closed state, the electromagnetic valve (12) is opened;
if T2＜To≤T1Then turning on the electric heater (11);
if To≤T2Then the electric heater (11) and the thermal valve (16) are opened;
if To＞T1If so, controlling the electric heater (11) not to act;
wherein, T1Is a first predetermined temperature, T2Is a second predetermined temperature, T1＞T2。
8. The control method according to claim 7,
if To≤T2And then opening the electric heater (11) and the thermal valve (16), further comprising:
the thermal valve (16) is operated for a first operating time T, and then the electromagnetic valve (12) is closed.
9. The control method according to claim 8,
the first operating time T ═ Ty(ii) a Wherein, TyThe duration of time required for the thermal valve (16) to open from closed.
10. The control method according to claim 6 or 7,
a first preset temperature T1Preferably 10 ℃; and/or
Second predetermined temperature T2Preferably 3 deg.c.
CN202010392579.6A 2020-05-11 2020-05-11 Two-combined-supply system and control method thereof Pending CN111649451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010392579.6A CN111649451A (en) 2020-05-11 2020-05-11 Two-combined-supply system and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010392579.6A CN111649451A (en) 2020-05-11 2020-05-11 Two-combined-supply system and control method thereof

Publications (1)

Publication Number Publication Date
CN111649451A true CN111649451A (en) 2020-09-11

Family

ID=72346873

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010392579.6A Pending CN111649451A (en) 2020-05-11 2020-05-11 Two-combined-supply system and control method thereof

Country Status (1)

Country Link
CN (1) CN111649451A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102759191A (en) * 2012-07-27 2012-10-31 江苏春兰空调设备有限公司 Heat pump water heater for preventing cold water from flowing outsides in defrosting state
CN202675696U (en) * 2012-06-07 2013-01-16 北京创意博能源科技有限公司 Solar hot water antifreezing system
WO2014102934A1 (en) * 2012-12-26 2014-07-03 ダイキン工業株式会社 Heat pump hot water heater
CN109751787A (en) * 2019-03-01 2019-05-14 南京天加环境科技有限公司 A kind of control method of air-conditioning ground heating one unit
CN109974296A (en) * 2017-12-28 2019-07-05 杭州先途电子有限公司 A kind of air energy water heater and its Defrost method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202675696U (en) * 2012-06-07 2013-01-16 北京创意博能源科技有限公司 Solar hot water antifreezing system
CN102759191A (en) * 2012-07-27 2012-10-31 江苏春兰空调设备有限公司 Heat pump water heater for preventing cold water from flowing outsides in defrosting state
WO2014102934A1 (en) * 2012-12-26 2014-07-03 ダイキン工業株式会社 Heat pump hot water heater
CN109974296A (en) * 2017-12-28 2019-07-05 杭州先途电子有限公司 A kind of air energy water heater and its Defrost method
CN109751787A (en) * 2019-03-01 2019-05-14 南京天加环境科技有限公司 A kind of control method of air-conditioning ground heating one unit

Similar Documents

Publication Publication Date Title
CN202041020U (en) Household air-source heat pump-floor radiation multifunctional system
CN201531959U (en) Heat recovery constant temperature and moisture air conditioning unit
CN101975422A (en) Warm/cool air-conditioner and defrosting method thereof
CN203869369U (en) Cooling and heating combined unit
CN104864627B (en) A kind of pair of heating refrigeration hot water dehumidification system
CN204963517U (en) Air source constant temperature and humidity vermicelli stoving heat recovery unit
CN200968715Y (en) Intelligent heat reclamation heat pump cold and hot water set
CN203928132U (en) A kind of ground heating system that can subregion independence temperature control
CN103388922A (en) Dual-compressor multifunctional air source heat pump air conditioner system
CN101603701B (en) Auxiliary heating method of air conditioner with auxiliary heating device
CN205332591U (en) Supplementary air source heat pump's of solar energy trigeminy supplies device
CN202835785U (en) Heat pump water heater capable of preventing cold water from flowing out in defrosting state
CN108444125A (en) The first overlapping circular formula heating hot-water air-conditioning three-way set
CN206234896U (en) A kind of solar energy, burnt gas wall hanging furnace and floor heating set heating system
CN204787419U (en) Air conditioner
CN111649451A (en) Two-combined-supply system and control method thereof
CN201255461Y (en) Device of hot water heat supply air conditioner for preventing heater from freezing by inlet of fresh air in cold area
CN203177386U (en) Air humidifying system
CN205119551U (en) Supply device based on solar energy - air source heat pump trigeminy
CN105650872A (en) Water heater
CN204460538U (en) A kind of intelligent cold-warm water air-conditioning
CN203177331U (en) Air humidifying system
CN203478601U (en) Heat pump water heater
CN203011003U (en) Air source heat pump hot water air conditioning unit
CN201106956Y (en) Multiple source heat energy units

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20200911

RJ01 Rejection of invention patent application after publication