CN112378005A - Primary and secondary water pumping system of air conditioner water system and energy-saving adjusting method thereof - Google Patents
Primary and secondary water pumping system of air conditioner water system and energy-saving adjusting method thereof Download PDFInfo
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- CN112378005A CN112378005A CN202011302625.5A CN202011302625A CN112378005A CN 112378005 A CN112378005 A CN 112378005A CN 202011302625 A CN202011302625 A CN 202011302625A CN 112378005 A CN112378005 A CN 112378005A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 189
- 238000005086 pumping Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 7
- 238000004378 air conditioning Methods 0.000 claims abstract description 47
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 239000003570 air Substances 0.000 description 40
- 239000000498 cooling water Substances 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a primary and secondary water pumping system of an air-conditioning water system and an energy-saving adjusting method thereof, which comprises an outdoor host machine, a buffer water tank and a controller, wherein a delivery pump is arranged in the outdoor host machine, the input and output ends of the buffer water tank are respectively and correspondingly connected with the output and input ends of the delivery pump, a one-way conduction horizontal check valve is connected on a delivery pipeline of which the output end of the delivery pump is connected with the input and output ends of the buffer water tank, the delivery pipeline of which the output end is connected with the input and output ends of the buffer water tank is divided into a left connecting pipe and a right connecting pipe by the horizontal check valve, the left connecting pipe is also connected with a plurality of air-conditioning water outlet pipes, each air-conditioning water outlet pipe is correspondingly connected with the input end of air-conditioning equipment of one room, the right connecting pipe is, each left connecting pipe is connected with a secondary variable frequency pump; the invention realizes the energy-saving function.
Description
Technical Field
The invention relates to the technical field of air conditioner water pumping, in particular to a primary and secondary water pumping system of an air conditioner water system.
Background
Air conditioners (Air conditioners) are Air conditioners. The device is used for manually regulating and controlling parameters such as temperature, humidity, flow rate and the like of ambient air in a building or a structure. Generally comprises a cold source/heat source device, a cold and hot medium delivery and distribution system, a terminal device and other auxiliary devices. The system mainly comprises a refrigeration host, a water pump, a fan and a pipeline system. The end device is responsible for specifically processing the air state by utilizing the cold and heat quantity from the transmission and distribution so as to enable the air parameters of the target environment to meet certain requirements.
The air conditioner is an indispensable part of people in modern life, and the air conditioner provides cool for people, so the air conditioner is widely applied by people.
Many large enterprises generally install a central air conditioner, and a water pump in the central air conditioner comprises a chilled water regulating pump, a central air conditioner cooling water pump and a water replenishing pump, wherein the chilled water regulating pump is a device for driving water to circularly flow in a chilled water loop. It is known that the tail end of an air-conditioning room (such as a fan coil, an air handling unit and the like) needs cold water provided by a cold water unit, but the chilled water cannot naturally flow due to the restriction of resistance, so that a water pump is needed to drive the chilled water to circulate to achieve the purpose of heat exchange; the cooling water pump of the central air conditioner drives water to circularly flow in the cooling water loop. As is known, cooling water, after entering a chiller, removes some of the heat from the refrigerant and then flows to a cooling tower where it is released. The cooling water pump is used for driving cooling water to circulate in a closed loop of the unit and the cooling tower, and the shape of the cooling water pump is the same as that of the chilled water pump; the water replenishing pump is a device for replenishing water to the air conditioner and is responsible for pumping treated softened water into a system. The shape is the same as that of the water pump. The commonly used water pumps include a horizontal centrifugal pump and a vertical centrifugal pump, which can be used in a chilled water system, a cooling water system and a water replenishing system, so that the air-conditioning water pump has a great effect.
At present, a plurality of rooms are generally connected in a central air conditioner, an outdoor host of the central air conditioner is generally provided with a freezing water regulating pump (a high-power delivery pump), the input and the output of the freezing water regulating pump are respectively connected with a water pipe, and a plurality of terminal air-conditioning equipment arranged in different rooms are connected in parallel through two water pipes, so that the following problems are caused: 1. if only two room end air conditioners are set up in a low-frequency use period, but an outdoor main unit of a central air conditioner (the configuration of a chilled water pump on the central air conditioner is that a plurality of end air conditioners are finally connected (20 rooms are finally required to be connected, so that the power consumption of the chilled water pump is relatively large), therefore, when the central air conditioner is in a circulating operation, only two room end air conditioners are set up, and the chilled water pump is still used for starting the function requirement of the final configuration, so that the power consumption is large, the waste is serious, and the improvement is needed.
Disclosure of Invention
The invention aims to provide a primary and secondary water pumping system of an air-conditioning water system, which aims to solve the problems of large power consumption, serious waste and energy saving in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a primary and secondary water pumping system of an air conditioning water system comprises an outdoor host machine, a buffer water tank and a controller, wherein a low-power delivery pump is arranged in the outdoor host machine, the input and output ends of the buffer water tank are respectively and correspondingly connected with the output and input ends of the delivery pump through delivery pipelines to form a water circulation pipe network, a one-way conduction horizontal check valve is connected on the delivery pipeline connecting the output end of the delivery pump with the input and output ends of the buffer water tank and ensures that water flows from the output end of the delivery pump to the input and output ends of the buffer water tank, the delivery pipeline connecting the output end of the delivery pump with the input and output ends of the buffer water tank is divided into a left connecting pipe and a right connecting pipe by the horizontal check valve, more than one air conditioning water outlet pipe which is connected in parallel is also connected on the left connecting pipe, and the air conditioning water, more than one air conditioner water return pipe which is arranged in parallel is connected to the right connecting pipe, each air conditioner water return pipe is correspondingly connected with the output end of the air conditioning equipment at the tail end of one room, a secondary variable frequency pump is connected to each left connecting pipe, and the controller is electrically connected with the secondary variable frequency pump.
Preferably, the system realizes automatic control, and further comprises a water quantity detector for detecting the water quantity required by the terminal air conditioners and a controller electrically connected with the water quantity detector, wherein the water quantity detector is arranged in each terminal air conditioner.
Preferably, the water return efficiency is improved, the buffer water tank is arranged on the side edge of the outdoor main machine, and the height of the buffer water tank is lower than that of the outdoor main machine.
Preferably, the water return efficiency is improved, and the interval between the buffer water tank and the outdoor host machine is set to be 0.2-0.5 m.
Preferably, the working efficiency is improved, and the secondary variable frequency pump is a constant differential pressure variable frequency pump.
Preferably, automatic control is realized, the fault problem of the horizontal check valve is detected in real time, maintenance and replacement are carried out in time, a first flow detector is arranged on the left connecting pipe, a second flow detector is arranged on the right connecting pipe, the first flow detector and the second flow detector are both electrically connected with the controller, and the controller is further connected with an alarm.
The invention also discloses an energy-saving adjusting method of the primary and secondary water pumping system of the air-conditioning water system, which comprises the following steps of:
s1, rapidly pumping water into a buffer water tank through a horizontal check valve by arranging a low-power delivery pump to form a primary pump delivery circulating system;
s2, controlling the starting power of the secondary variable frequency pump according to the water quantity condition required by the tail end air conditioning equipment in the room, and finally obtaining the water quantity pumped into the tail end air conditioning equipment to form a secondary pump conveying circulation system;
s3, the horizontal check valve is used for enabling water to flow to the buffer water tank only from the delivery pump, and meanwhile mixing of air-conditioning water supply and return water in the secondary pump delivery circulating system is avoided, so that energy-saving conditioning water supply is completed.
According to the primary and secondary water pumping system of the air-conditioning water system and the energy-saving adjusting method thereof, the structure is that a low-power delivery pump is arranged, water is rapidly pumped into a buffer water tank through a horizontal check valve to form a primary pump delivery circulating system, then the starting power of a secondary variable frequency pump is controlled according to the water quantity condition required by the tail-end air-conditioning equipment in a room, and finally the water quantity pumped into the tail-end air-conditioning equipment is obtained to form a secondary pump delivery circulating system; finally, the horizontal check valve is utilized to realize that water can only flow to the buffer tank from the delivery pump, and the mixing of air conditioning water supply and return water in the secondary pump delivery circulating system is avoided simultaneously to accomplish the effect of energy-saving conditioning water supply.
Drawings
FIG. 1 is a schematic structural diagram of a primary and secondary water pumping system of an air-conditioning water system according to embodiment 1;
fig. 2 is a schematic structural view of a primary and secondary water pumping system of an air-conditioning water system in the embodiment 2;
fig. 3 is a schematic structural diagram of a primary and secondary water pumping system of an air-conditioning water system in embodiment 3.
In the figure: the device comprises an outdoor host 1, a buffer water tank 2, a delivery pump 3, a delivery pipeline 4, a horizontal check valve 5, a left connecting pipe 6, a right connecting pipe 7, an air conditioner water outlet pipe 8, an air conditioner water return pipe 9, a secondary variable frequency pump 10, a water quantity detector 11, a controller 12, a first flow detector 13, a second flow detector 14 and an alarm 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1, the embodiment provides a primary and secondary water pumping system of an air conditioning water system, which includes an outdoor host 1, a buffer water tank 2 and a controller 12, wherein a low-power delivery pump 3 is disposed in the outdoor host 1, an input end and an output end of the buffer water tank 2 are respectively connected with an output end and an input end of the delivery pump 3 through a delivery pipe 4 to form a water circulation pipe network, the delivery pipe 4 connecting the output end of the delivery pump 3 with the input end of the buffer water tank 2 is connected with a one-way conduction horizontal check valve 5, the horizontal check valve 5 ensures that water flows from the output end of the delivery pump 3 to the input end of the buffer water tank 2, the delivery pipe 4 connecting the output end of the delivery pump 3 with the input end of the buffer water tank 2 is divided into a left connecting pipe 6 and a right connecting pipe 7 by the horizontal check valve 5, the left connecting pipe 6 is further connected with more, each air conditioner water outlet pipe 8 is correspondingly connected with an input end of the tail end air conditioning equipment of one room, more than one air conditioner water return pipe 9 which is arranged in parallel is further connected onto the right connecting pipe 7, each air conditioner water return pipe 9 is correspondingly connected with an output end of the tail end air conditioning equipment of one room, a secondary variable frequency pump 10 is connected onto each left connecting pipe 6, and the controller 12 is electrically connected with the secondary variable frequency pump 10.
According to the structure, a low-power delivery pump 3 is arranged to rapidly pump water into a buffer water tank 2 through a horizontal check valve 5 to form a primary pump delivery circulating system, then the starting power of a secondary variable frequency pump 10 is controlled according to the water quantity condition required by the tail end air conditioning equipment in a room, and finally the water quantity pumped into the tail end air conditioning equipment is obtained to form a secondary pump delivery circulating system; finally, the horizontal check valve 5 is utilized to realize that water can only flow to the buffer water tank 2 from the delivery pump 3, and simultaneously, the mixing of air conditioning water supply and return water in a secondary pump delivery circulating system is avoided so as to finish the effect of energy-saving water supply adjustment.
Preferably, the water return efficiency is improved, the buffer water tank 2 is arranged on the side edge of the outdoor main machine 1, and the height of the buffer water tank 2 is lower than that of the outdoor main machine 1.
Preferably, the water return efficiency is improved, and the interval between the buffer water tank 2 and the outdoor host 1 is set to be 0.2-0.5 m.
Preferably, the working efficiency is improved, and the secondary variable frequency pump 10 is a constant pressure difference variable frequency pump.
The embodiment also discloses an energy-saving regulation method of a primary and secondary water pumping system of the air-conditioning water system, which comprises the following steps of:
s1, rapidly pumping water into the buffer water tank 2 through the horizontal check valve 5 by arranging a low-power delivery pump 3 to form a primary pump delivery circulating system;
s2, controlling the starting power of the secondary variable frequency pump 10 according to the water quantity condition required by the tail end air conditioning equipment in the room, and finally obtaining the water quantity pumped into the tail end air conditioning equipment to form a secondary pump conveying circulation system;
s3, the horizontal check valve 5 is utilized to realize that water can only flow from the delivery pump 3 to the buffer water tank 2, and simultaneously, the mixing of air conditioning water supply and water return in the secondary pump delivery circulating system is avoided, so that the energy-saving regulation water supply is completed.
Example 2:
referring to fig. 2, the embodiment provides a primary and secondary water pumping system of an air conditioning water system, preferably, the primary and secondary water pumping system realizes automatic control, and further includes a water detector 11 for detecting a water amount required by a terminal air conditioner, the water detector 11 is disposed in each terminal air conditioner, the water detector 11 for detecting the water amount required by the terminal air conditioner in real time is disposed to automatically detect the water amount required by the terminal air conditioner, and send the detected water amount to a controller 12, the controller 12 finally controls the secondary inverter pump 10 to be turned on and off, and finally the water amount required by the terminal air conditioner is pumped into the terminal air conditioner through the secondary inverter pump 10 to finally realize automatic control and energy saving effects in advance.
Example 3:
referring to fig. 3, the present embodiment provides a primary and secondary water pumping system of an air conditioning water system, which is preferable, and realizes automatic control, and simultaneously detects the failure problem of the horizontal check valve 5 in real time, and performs maintenance, replacement, a first flow rate detector 13 is provided on the left connection pipe 6, a second flow rate detector 14 is provided on the right connection pipe 7, the first flow detector 13 and the second flow detector 14 are both electrically connected to the controller 12, the controller 12 is also connected with an alarm 15, the first flow detector 13 and the second flow detector 14 are arranged to detect the water quantity condition of the left connecting pipe 6 and the right connecting pipe 7 in real time, when the water quantity of the left connecting pipe 6 subtracted from the water quantity of the right connecting pipe 7 is smaller than a preset threshold value, the problem that the horizontal check valve 5 is blocked or damaged is solved, alarm reminding is carried out through the alarm 15, and goods can be replaced and maintained in time.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a secondary pumping water system of air conditioner water system, includes outdoor host computer (1), buffer tank (2) and controller (12), its characterized in that: a low-power delivery pump (3) is arranged in the outdoor host (1), the input and output ends of the buffer water tank (2) are respectively and correspondingly connected with the output and input ends of the delivery pump (3) through a delivery pipeline (4) to form a water circulation pipe network, a one-way conduction horizontal check valve (5) is connected on the delivery pipeline (4) of which the output end of the delivery pump (3) is connected with the input and output end of the buffer water tank (2), the horizontal check valve (5) ensures that water flows from the output end of the delivery pump (3) to the input and output end of the buffer water tank (2), the delivery pipeline (4) of which the output end of the delivery pump (3) is connected with the input and output end of the buffer water tank (2) is divided into a left connecting pipe (6) and a right connecting pipe (7), more than one air conditioner water outlet pipe (8) which is connected in parallel is also connected on the, each air conditioner water outlet pipe (8) is correspondingly connected with the input end of the tail end air conditioning equipment of one room, more than one air conditioner water return pipe (9) which is arranged in parallel is further connected onto the right connecting pipe (7), each air conditioner water return pipe (9) is correspondingly connected with the output end of the tail end air conditioning equipment of one room, a secondary variable frequency pump (10) is connected onto each left connecting pipe (6), and the controller (12) is electrically connected with the secondary variable frequency pump (10).
2. A secondary pumping system of an air conditioning water system as set forth in claim 1, wherein: the air conditioner also comprises a water quantity detector (11) for detecting the water quantity required by the terminal air conditioners, and the water quantity detector (11) is arranged in each terminal air conditioner.
3. A secondary pumping system of an air conditioning water system as set forth in claim 2, wherein: the buffer water tank (2) is arranged on the side edge of the outdoor host (1), and the height of the buffer water tank (2) is lower than that of the outdoor host (1).
4. A secondary water pumping system of an air conditioning water system as claimed in claim 3, wherein: the interval between the buffer water tank (2) and the outdoor host (1) is set to be 0.2-0.5 m.
5. The primary and secondary water pumping system of an air conditioning water system as claimed in claim 4, wherein: the secondary variable frequency pump (10) is a constant pressure difference variable frequency pump.
6. A secondary pumping system of an air-conditioning water system as set forth in claim 5, wherein: be equipped with first flow detector (13) on left connecting pipe (6), be equipped with second flow detector (14) in right connecting pipe (7), first flow detector (13) and second flow detector (14) all be connected with controller (12) electricity, still be connected with alarm (15) on controller (12).
7. An energy-saving regulation method of a primary and secondary water pumping system of an air-conditioning water system, comprising the primary and secondary water pumping system of the air-conditioning water system according to claim 6, characterized by comprising the following steps:
s1, rapidly pumping water into a buffer water tank (2) through a horizontal check valve (5) by arranging a low-power delivery pump (3) to form a primary pump delivery circulating system;
s2, controlling the starting power of the secondary variable frequency pump (10) according to the water quantity condition required by the tail end air conditioning equipment in the room, and finally obtaining the water quantity pumped into the tail end air conditioning equipment to form a secondary pump conveying circulation system;
s3, the horizontal check valve (5) is utilized to realize that water can only flow to the buffer water tank (2) from the delivery pump (3), and simultaneously, the mixing of air conditioning water supply and backwater in the secondary pump delivery circulating system is avoided, so that the energy-saving conditioning water supply is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302625.5A CN112378005A (en) | 2020-11-19 | 2020-11-19 | Primary and secondary water pumping system of air conditioner water system and energy-saving adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302625.5A CN112378005A (en) | 2020-11-19 | 2020-11-19 | Primary and secondary water pumping system of air conditioner water system and energy-saving adjusting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112378005A true CN112378005A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011302625.5A Pending CN112378005A (en) | 2020-11-19 | 2020-11-19 | Primary and secondary water pumping system of air conditioner water system and energy-saving adjusting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719357A (en) * | 2022-04-12 | 2022-07-08 | 湖北华工能源股份有限公司 | Energy-saving design method for secondary cascade pump of central air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009115452A (en) * | 2009-02-26 | 2009-05-28 | Hitachi Cable Ltd | Cold water circulating system |
| CN203501350U (en) * | 2013-08-30 | 2014-03-26 | 广州科创节能科技服务有限公司 | PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system |
| CN206369306U (en) * | 2017-01-09 | 2017-08-01 | 深圳市海源节能科技有限公司 | Once and secondary pump variable volume energy-saving control system |
| CN109579188A (en) * | 2018-12-15 | 2019-04-05 | 浙江永德信科技有限公司 | Automatic control and HVAC all-in-one machine for air-conditioning system |
-
2020
- 2020-11-19 CN CN202011302625.5A patent/CN112378005A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009115452A (en) * | 2009-02-26 | 2009-05-28 | Hitachi Cable Ltd | Cold water circulating system |
| CN203501350U (en) * | 2013-08-30 | 2014-03-26 | 广州科创节能科技服务有限公司 | PID (Proportional, Integral and Derivative) controller-based variable flow rate air conditioner water system |
| CN206369306U (en) * | 2017-01-09 | 2017-08-01 | 深圳市海源节能科技有限公司 | Once and secondary pump variable volume energy-saving control system |
| CN109579188A (en) * | 2018-12-15 | 2019-04-05 | 浙江永德信科技有限公司 | Automatic control and HVAC all-in-one machine for air-conditioning system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719357A (en) * | 2022-04-12 | 2022-07-08 | 湖北华工能源股份有限公司 | Energy-saving design method for secondary cascade pump of central air conditioner |
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