CN203771630U - Air-conditioning floor heating system allowing centralized control in different rooms and time periods - Google Patents
Air-conditioning floor heating system allowing centralized control in different rooms and time periods Download PDFInfo
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- CN203771630U CN203771630U CN201420049517.5U CN201420049517U CN203771630U CN 203771630 U CN203771630 U CN 203771630U CN 201420049517 U CN201420049517 U CN 201420049517U CN 203771630 U CN203771630 U CN 203771630U
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Abstract
The utility model discloses an air-conditioning floor heating system allowing centralized control in different rooms and time periods. The air-conditioning floor heating system adopts a temperature controller with a plurality of temperature control units for respectively controlling temperatures in all the rooms, so that the temperatures in all the rooms are controlled independently; in addition, a buffering water tank is additionally arranged between an air source heat pump and an air-conditioning floor heating circulating pump in the air-conditioning floor heating system, when the temperatures in the rooms are controlled independently, due to the function of the buffering water tank, the air-conditioning floor heating circulating pump is not directly communicated with the air source heat pump, hot water and cold water exchanges heat in the buffering water tank, when the temperatures in all the rooms are adjusted, water flow of the air source heat pump will not fluctuate in a large range, namely water flow of the air-conditioning system end changes little in the operation process, and in this way, start or stop frequency of the air circulating pump can be effectively lowered, which is beneficial for prolonging service life of the system.
Description
Technical field
The utility model relates to air-conditioning ground heating technical field, and relating in particular to one can the central controlled air-conditioning ground heating system of locellus timesharing.
Background technology
In the epoch of nowadays advocating environmental protection and energy saving, utilize the high energy efficiency of heat pump principle Technology design exploitation and the hot-water heating system of environmental protection more and more to receive people's concern.Air source heat pump system is by utilizing a small amount of electric energy, thus by airborne transfer of heat the equipment to hot water preparing in water, it is to utilize contrary Carnot cycle principle, by the work of compressor, realizes the transfer of low temperature heat energy to high temperature heat.This mode that heats has been saved the energy greatly.
Along with the fast development of heat pump industry, heat pump is also no longer confined to Teat pump boiler, current, with the combination of heat pump type air conditioner, as three-in-one in air source heat pump (domestic hot-water, air-conditioning, heating), the product of heating system end starts to tromp to market especially in combination.That air-conditioning ground heating based on air source heat pump system has is energy-conservation, safety and the easy many merits such as control.The three-in-one unit of air source heat pump, according to the needs of the different occasions of Various Seasonal, can realize single water heating, single refrigeration, single (two) heating, refrigeration heat production simultaneously water, heating heat production simultaneously water, and its scope of application is extremely extensive.
For reducing energy consumption, meet the theme of " energy-conserving and environment-protective " advocated now, in the three-in-one unit of existing air source heat pump, in the situation that Pipeline Water flow is stable, air source heat pump is for stopping or in resting state.In the three-in-one unit of existing air source heat pump, mostly be central heating, can not carry out the control of timesharing locellus.In addition, due to the pipeline of the three-in-one unit hollow of existing air source heat pump air supply heat pump directly and air-conditioning ground heating pipeline communication, in practical application due to each indoor independent control of needs, therefore can cause that the discharge in pipeline is unstable, change frequent, and then directly cause air source heat pump frequent starting or stop, affecting the service life of system.
Therefore, the one locellus time-sharing system packaging, is that the control of the control of source pump and end (fan coil, floor heating water collecting and diversifying device, radiator etc.) is combined well, ensures the each room temperature locellus of user timesharing control, whole system is stable, energy-conservation, extends system service life.
Utility model content
For the deficiencies in the prior art, the utility model provides the one can the central controlled air-conditioning ground heating system of locellus timesharing.
Air source heat pump, with corresponding control circuit, this air source heat pump is provided with separate loop and the cold and hot loop of heating;
Buffer tank, is communicated with in described cold and hot loop;
Master circulating pump, is serially connected with in described cold and hot loop with buffer tank;
Master relay, for controlling the start and stop of master circulating pump, is controlled by the control circuit of air source heat pump;
Air-conditioning ground heating circulating pump, is connected with described buffer tank by indoor loop;
Multiple indoor heat exchangers, the described indoor loop of circulating water line access in parallel of each indoor heat exchanger, each indoor heat exchanger band is useful on controls the start and stop relay that circulating water line opens and closes separately;
Multichannel floor heating heat exchange device, the in parallel access in described indoor loop of circulating water line of each road floor heating heat exchange device, every road floor heating heat exchange device band is useful on controls the start and stop relay that circulating water line opens and closes separately;
Air conditioner temperature controller, is provided with multiple temperature conditioning units, corresponding with the start and stop relay of each indoor heat exchanger respectively;
Ground temperature controller, is provided with multiple temperature conditioning units, respectively the start and stop relay correspondence of Yu Ge road floor heating heat exchange device;
Pressure sensor, the output pressure of collection air-conditioning ground heating circulating pump;
Frequency converter, for the signal that receives described pressure sensor to control described air-conditioning ground heating circulating pump;
Three relays, are connected in parallel in the current supply circuit of described frequency converter, are respectively:
The first relay, is parallel with first group of linked switch in the control coil of the first relay, the start and stop relay linkage of each linked switch and respective chambers heat exchanger;
The second relay, is parallel with second group of linked switch in the control coil of the second relay, the start and stop relay linkage of each linked switch and corresponding floor heating heat exchanger;
Linkage relay, the control coil of linkage relay connects the control circuit of air source heat pump.
In the utility model, air source heat pump, master circulating pump and frequency converter can adopt suitable Power supply according to concrete instructions for use or model.
In air-conditioning ground heating system of the present utility model, linked switch can be selected on-off circuit, the input of this on-off circuit and the duty that is controlled by corresponding start and stop relay, and in the time that start and stop relay is connected, this on-off circuit is synchronously conducting accordingly, thereby the first relay that is controlled by linked switch is connected.
Linked switch also can be set in air-conditioning ground heating system of the present utility model, an interlock output is directly set in air-conditioner temperature controller, interlock signal controlling first relay of the output of this interlock output, this interlock signal is associated with the output of each temperature conditioning unit in air-conditioner temperature controller, as long as the control signal that has a temperature conditioning unit to send makes the conducting of start and stop relay, the signal of this interlock output output makes the first relay conducting.In like manner, an interlock output is set in floor heating temperature controller, interlock signal controlling second relay of the output of this interlock output, this interlock signal is associated with the output of each temperature conditioning unit in floor heating temperature controller, as long as the control signal that has a temperature conditioning unit to send makes the conducting of start and stop relay, the signal of this interlock output output makes the second relay conducting.
Any one relay conducting in the relay (i.e. the first relay, the second relay and linkage relay) in three access in parallel inverter supply loops, frequency converter gets final product normal power supply.
The identical control signal that is controlled by the control circuit output of air source heat pump between linkage relay and master relay, the two duty is synchronous, ensures like this conducting of master relay, i.e. and when master circulating pump work, frequency converter can normal power supply.
Air-conditioning ground heating system of the present utility model adopts the temperature controller with multiple temperature conditioning units to control separately respectively each indoor temperature, realizes the independent of temperature in each room and controls.For air-conditioning system, because each room arranges an indoor heat exchanger, therefore each indoor heat exchanger arranges an air-conditioner temperature control module.For ground heating system, need to be according to room-size, determine the way that floor heating heat exchange device need to be set in each room.But no matter how many road, each room floor heating heat exchange device, in ground temperature controller, the number of temperature conditioning unit is equal to room number, i.e. a corresponding temperature conditioning unit in room.This is that the start and stop relay that therefore magnetic valve of the floor heating heat exchange device of same room is corresponding can share the temperature control unit of because the duty of same room Zhong Ge road floor heating heat exchange device should be synchronous.
In addition, in air-conditioning ground heating system of the present utility model, between air source heat pump and air-conditioning ground heating circulating pump, set up buffer tank, in the time of the independent temperature of controlling multiple rooms, due to the effect of buffer tank, air-conditioning ground heating circulating pump is not directly communicated with air source heat pump, the heat exchange in buffer tank of hot water and cold water, thereby in the time that each indoor temperature regulates, the discharge of air source heat pump there will not be larger fluctuation, even the variation of the discharge of air-conditioning system end is less in running, can effectively reduce like this frequency starting or stoping of air source heat pump, be conducive to extend the service life of system.
Described air-conditioning ground heating system also comprises:
Domestic hot-water's case, is connected with air source heat pump by the described loop that heats;
Hot water circulating pump, heats on loop described in being positioned at;
Hot water relay, for controlling the start and stop of hot water circulating pump, is controlled by the control circuit of air source heat pump.
Form domestic hot-water, air-conditioning and the three-in-one air source heat pump system of floor heating, can effectively reduce energy consumption.Hot water relay is set, by the control circuit of air source heat pump, is convenient to centralized Control.Hot water relay and master relay are all controlled by the control circuit of air source heat pump, but separate between the two, are controlled by different control signals.
The control circuit of described air source heat pump comprises temperature control unit, for according to the startup of the temperature controlled air source heat pump of buffer tank with stop.In this temperature control unit, be provided with the temperature sensor of measuring the water temperature in buffer tank, the start and stop (start and stop) of the temperature controlled air source heat pump collecting according to sensor.
Described indoor loop comprises air-conditioner circulating water main pipe rail and floor heating circulation supply mains road, the circulating water line access in parallel air-conditioner circulating water main pipe rail of each indoor heat exchanger, the circulating water line of each road floor heating heat exchange device accesses floor heating circulation supply mains road by water collecting and diversifying device.
Indoor loop splits into two-way after air-conditioning ground heating circulating pump, is air-conditioner circulating water main pipe rail and floor heating circulation supply mains road.Drawing several interfaces from air-conditioner circulating water main pipe rail docks with indoor heat exchanger, floor heating circulation supply mains road is connected with the water collecting and diversifying device with multipair bleeder and inlet and is connected with each floor heating heat exchange device, and the water inlet of every road floor heating heat exchange device and delivery port are connected to a pair of bleeder and the inlet of water collecting and diversifying device.
The water inlet of each indoor heat exchanger is provided with magnetic valve, and corresponding start and stop relay is arranged on the control loop of magnetic valve.
The water inlet of every road floor heating heat exchange device is provided with magnetic valve, and corresponding start and stop relay is arranged on the control loop of magnetic valve.The water inlet of floor heating heat exchange device is provided with magnetic valve and is arranged at the corresponding bleeder place of floor heating heat exchange device, water collecting and diversifying device Zhong Yugai road more.
For preventing vibration, and be convenient to install, the water inlet of described indoor heat exchanger and delivery port all dock with the indoor air-conditioner circulating water main pipe rail that gains road by flexible pipe.
The volume of described buffer tank is 80～100L.The size of buffer tank is according to system size setting, and relevant with the quantity of indoor heat exchanger and floor heating heat exchange device, quantity is larger in theory, and the buffer tank capacity needing is larger.Air-conditioning ground heating system of the present utility model is applicable to middle-size and small-size system, and in this system, the quantity of indoor heat exchanger is less than or equal to 10, and the quantity of floor heating heat exchange device is less than or equal to 20, and therefore, the volume that buffer tank is set is 80～100L.
Described buffer tank is provided with steam vent, and described steam vent is connected with air bleeding valve.In time the gas producing is discharged, keep the pressure of air-conditioning ground heating circulating pump steady.
Air-conditioning ground heating system of the present utility model adopts the temperature controller with multiple temperature conditioning units to control separately respectively each indoor temperature, realizing the independent of temperature in each room controls, and set up buffer tank between air source heat pump and air-conditioning ground heating circulating pump, in the time of the independent temperature of controlling multiple rooms, due to the effect of buffer tank, air-conditioning ground heating circulating pump is not directly communicated with air source heat pump, the heat exchange in buffer tank of hot water and cold water, thereby in the time that each indoor temperature regulates, the discharge of air source heat pump there will not be larger fluctuation, even the variation of the discharge of air-conditioning system end is less in running, can effectively reduce like this frequency starting or stoping of air circulation pump, be conducive to extend the service life of system.
Brief description of the drawings
Fig. 1 is the structural representation of air-conditioning ground heating system of the present utility model.
Detailed description of the invention
Below in conjunction with concrete the drawings and specific embodiments, the utility model is elaborated.
One can the central controlled air-conditioning ground heating system of locellus timesharing, as shown in Figure 1 (in figure, solid line represents that water pipe connects, and dotted line indication circuit connects), comprising:
Air source heat pump, with corresponding control circuit, this air source heat pump is provided with separate loop and the cold and hot loop of heating;
The control circuit of air source heat pump also comprises temperature control unit, for according to the startup of the temperature controlled air source heat pump of buffer tank with stop.In this temperature control unit, be provided with the temperature sensor of measuring the water temperature in buffer tank, the start and stop (start and stop) of the temperature controlled air source heat pump collecting according to sensor.
Domestic hot-water's case, is connected with air source heat pump by the described loop that heats;
Hot water circulating pump, is positioned at and heats on loop;
Hot water relay, for controlling the start and stop of hot water circulating pump, is controlled by the control circuit of air source heat pump;
Buffer tank, is communicated with in cold and hot loop;
Master circulating pump, is serially connected with in cold and hot loop with buffer tank;
Master relay, for controlling the start and stop of master circulating pump, is controlled by the control circuit of air source heat pump;
Air-conditioning ground heating circulating pump, is connected with buffer tank by indoor loop;
Multiple indoor heat exchangers (be fan coil in the present embodiment, and quantity being 10), the described indoor loop of circulating water line access in parallel of each indoor heat exchanger, each indoor heat exchanger band is useful on controls the start and stop relay that circulating water line opens and closes separately;
Multichannel floor heating heat exchange device (is on-the-spot " Back Word type " PE-RT end pipeline of laying in the present embodiment, the water inlet of each road floor heating heat exchange device and delivery port corresponding a pair of bleeder and the inlet of receiving water collecting and diversifying device respectively), in the indoor loop of circulating water line access in parallel of each road floor heating heat exchange device, every road floor heating heat exchange device band is useful on controls the start and stop relay that circulating water line opens and closes separately;
Air conditioner temperature controller, is provided with multiple temperature conditioning units, corresponding with the start and stop relay of each indoor heat exchanger respectively;
Ground temperature controller, is provided with multiple temperature conditioning units, respectively the start and stop relay correspondence of Yu Ge road floor heating heat exchange device;
Indoor loop comprises air-conditioner circulating water main pipe rail and floor heating circulation supply mains road, the circulating water line access in parallel air-conditioner circulating water main pipe rail of each indoor heat exchanger, the circulating water line of each road floor heating heat exchange device is by water collecting and diversifying device access in parallel floor heating circulation supply mains road.
Indoor loop splits into two-way after air-conditioning ground heating circulating pump, is air-conditioner circulating water main pipe rail and floor heating circulation supply mains road.Draw respectively several interfaces from air-conditioner circulating water main pipe rail and floor heating circulation supply mains road and dock with indoor heat exchanger, by arranging respectively, house steward is convenient to be connected.For preventing vibration, and be convenient to install, the water inlet of indoor heat exchanger and delivery port all dock with the indoor air-conditioner circulating water main pipe rail that gains road by flexible pipe.
The water inlet of each indoor heat exchanger is provided with magnetic valve, and corresponding start and stop relay is arranged on the control loop of magnetic valve.
The water inlet of every road floor heating heat exchange device is provided with magnetic valve, and corresponding start and stop relay is arranged on the control loop of magnetic valve.For ease of controlling, this magnetic valve is installed on interface corresponding with this floor heating heat exchange device in water collecting and diversifying device.
Pressure sensor, the output pressure of collection air-conditioning ground heating circulating pump;
Frequency converter, for the signal that receives described pressure sensor to control described air-conditioning ground heating circulating pump;
Three relays, are connected in parallel in the current supply circuit of described frequency converter, are respectively:
The first relay, is parallel with first group of linked switch in the control coil of the first relay, the start and stop relay linkage of each linked switch and respective chambers heat exchanger;
The second relay, is parallel with second group of linked switch in the control coil of the second relay, the start and stop relay linkage of each linked switch and corresponding floor heating heat exchanger;
Linkage relay, the control coil of linkage relay connects the control circuit of air source heat pump.
The air-conditioning ground heating system of the present embodiment is collection domestic hot-water, air-conditioning and the three-in-one air source heat pump system of floor heating, can effectively reduce energy consumption.
In the utility model, air source heat pump, master circulating pump and frequency converter can adopt suitable Power supply according to concrete instructions for use or model.
Linked switch in the present embodiment is on-off circuit, the input of this on-off circuit and the duty that is controlled by corresponding start and stop relay, and in the time that start and stop relay is connected, this on-off circuit is synchronously conducting accordingly, thereby the first relay that is controlled by linked switch is connected.
Any one relay conducting in the relay (i.e. the first relay, the second relay and linkage relay) in three access in parallel inverter supply loops, frequency converter gets final product normal power supply.
The identical control signal that is controlled by the control circuit output of air source heat pump between linkage relay and master relay, the two duty is synchronous, ensures like this conducting of master relay, i.e. and when master circulating pump work, frequency converter can normal power supply.
The volume of the buffer tank in the present embodiment is 100L.The volume of the buffer tank in the present embodiment is 80～100L.This buffer tank is provided with steam vent, and steam vent is connected with air bleeding valve.
The above; it is only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.
Claims (8)
1. can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, comprising:
Air source heat pump, with corresponding control circuit, this air source heat pump is provided with separate loop and the cold and hot loop of heating;
Buffer tank, is communicated with in described cold and hot loop;
Master circulating pump, is serially connected with in described cold and hot loop with buffer tank;
Master relay, for controlling the start and stop of master circulating pump, is controlled by the control circuit of air source heat pump;
Air-conditioning ground heating circulating pump, is connected with described buffer tank by indoor loop;
Multiple indoor heat exchangers, the described indoor loop of circulating water line access in parallel of each indoor heat exchanger, each indoor heat exchanger band is useful on controls the start and stop relay that circulating water line opens and closes separately;
Multichannel floor heating heat exchange device, the in parallel access in described indoor loop of circulating water line of each road floor heating heat exchange device, every road floor heating heat exchange device band is useful on controls the start and stop relay that circulating water line opens and closes separately;
Air conditioner temperature controller, is provided with multiple temperature conditioning units, corresponding with the start and stop relay of each indoor heat exchanger respectively;
Ground temperature controller, is provided with multiple temperature conditioning units, respectively the start and stop relay correspondence of Yu Ge road floor heating heat exchange device;
Pressure sensor, the output pressure of collection air-conditioning ground heating circulating pump;
Frequency converter, for the signal that receives described pressure sensor to control described air-conditioning ground heating circulating pump;
Three relays, are connected in parallel in the current supply circuit of described frequency converter, are respectively:
The first relay, is parallel with first group of linked switch in the control coil of the first relay, the start and stop relay linkage of each linked switch and respective chambers heat exchanger;
The second relay, is parallel with second group of linked switch in the control coil of the second relay, the start and stop relay linkage of each linked switch and corresponding floor heating heat exchanger;
Linkage relay, the control coil of linkage relay connects the control circuit of air source heat pump.
2. as claimed in claim 1 can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, described air-conditioning ground heating system also comprises:
Domestic hot-water's case, is connected with air source heat pump by the described loop that heats;
Hot water circulating pump, heats on loop described in being positioned at;
Hot water relay, for controlling the start and stop of hot water circulating pump, is controlled by the control circuit of air source heat pump.
3. as claimed in claim 2 can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, the control circuit of described air source heat pump comprises temperature control unit, for according to the startup of the temperature controlled air source heat pump of buffer tank with stop.
4. as claimed in claim 3 can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, described indoor loop comprises air-conditioner circulating water main pipe rail and floor heating circulation supply mains road, the circulating water line access in parallel air-conditioner circulating water main pipe rail of each indoor heat exchanger, the circulating water line of each road floor heating heat exchange device accesses floor heating circulation supply mains road by water collecting and diversifying device.
5. as claimed in claim 4 can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, the water inlet of each indoor heat exchanger is provided with magnetic valve, corresponding start and stop relay is arranged on the control loop of magnetic valve.
6. as claimed in claim 4 can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, the water inlet of every road floor heating heat exchange device is provided with magnetic valve, corresponding start and stop relay is arranged on the control loop of magnetic valve.
As described in claim 5 or 6 can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, the volume of described buffer tank is 80～100L.
8. as claimed in claim 7 can the central controlled air-conditioning ground heating system of locellus timesharing, it is characterized in that, described buffer tank is provided with steam vent, described steam vent is connected with air bleeding valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049517.5U CN203771630U (en) | 2014-01-26 | 2014-01-26 | Air-conditioning floor heating system allowing centralized control in different rooms and time periods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420049517.5U CN203771630U (en) | 2014-01-26 | 2014-01-26 | Air-conditioning floor heating system allowing centralized control in different rooms and time periods |
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| Publication Number | Publication Date |
|---|---|
| CN203771630U true CN203771630U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420049517.5U Withdrawn - After Issue CN203771630U (en) | 2014-01-26 | 2014-01-26 | Air-conditioning floor heating system allowing centralized control in different rooms and time periods |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776135A (en) * | 2014-01-26 | 2014-05-07 | 杭州鸿雁管道***科技有限公司 | Air-condition floor heating system capable of being centrally controlled through separated chambers and divided time |
| CN107166805A (en) * | 2017-05-18 | 2017-09-15 | 浙江理工大学 | A kind of air source heat pump computer room is grouped group control system with pump for valve |
| CN107969168A (en) * | 2015-03-31 | 2018-04-27 | 大金工业株式会社 | The control system of coordinated signals multiple equipment |
| CN108458448A (en) * | 2018-03-23 | 2018-08-28 | 陈旸 | A kind of convection current and the adaptive supply HVAC control system of radiation |
| CN109489166A (en) * | 2018-11-29 | 2019-03-19 | 南京索热电子科技有限公司 | A kind of ground temperature-regulating solid air-conditioning system |
| WO2023231303A1 (en) * | 2022-05-31 | 2023-12-07 | 青岛海信日立空调***有限公司 | Heating system and control method therefor |
-
2014
- 2014-01-26 CN CN201420049517.5U patent/CN203771630U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776135A (en) * | 2014-01-26 | 2014-05-07 | 杭州鸿雁管道***科技有限公司 | Air-condition floor heating system capable of being centrally controlled through separated chambers and divided time |
| CN103776135B (en) * | 2014-01-26 | 2016-05-04 | 杭州鸿雁管道***科技有限公司 | Can the central controlled air-conditioning ground heating system of locellus timesharing |
| CN107969168A (en) * | 2015-03-31 | 2018-04-27 | 大金工业株式会社 | The control system of coordinated signals multiple equipment |
| CN107969168B (en) * | 2015-03-31 | 2020-09-15 | 大金工业株式会社 | Control system for linkage control of multiple devices |
| CN107166805A (en) * | 2017-05-18 | 2017-09-15 | 浙江理工大学 | A kind of air source heat pump computer room is grouped group control system with pump for valve |
| CN108458448A (en) * | 2018-03-23 | 2018-08-28 | 陈旸 | A kind of convection current and the adaptive supply HVAC control system of radiation |
| CN108458448B (en) * | 2018-03-23 | 2024-02-09 | 陈旸 | Convection and radiation self-adaptive supply heating and ventilation control system |
| CN109489166A (en) * | 2018-11-29 | 2019-03-19 | 南京索热电子科技有限公司 | A kind of ground temperature-regulating solid air-conditioning system |
| WO2023231303A1 (en) * | 2022-05-31 | 2023-12-07 | 青岛海信日立空调***有限公司 | Heating system and control method therefor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140813 Effective date of abandoning: 20160504 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |