CN218972859U - Domestic central air-conditioning water system with constant flow - Google Patents
Domestic central air-conditioning water system with constant flow Download PDFInfo
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- CN218972859U CN218972859U CN202223167015.6U CN202223167015U CN218972859U CN 218972859 U CN218972859 U CN 218972859U CN 202223167015 U CN202223167015 U CN 202223167015U CN 218972859 U CN218972859 U CN 218972859U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model discloses a household central air-conditioning water system with constant flow, which comprises an air-conditioning host machine, a water supply main pipe, a water return main pipe and a plurality of fan coils; the water supply main pipe is provided with a first water supply branch pipe and a second water supply branch pipe, the first water supply branch pipe is provided with an electric two-way valve, the second water supply branch pipe is provided with an electric three-way valve, a bypass pipe is connected between the water return main pipe and the water supply main pipe, a gate valve is arranged on the bypass pipe, and the gate valve is used for manually adjusting the water return amount between the water supply main pipe and the water return main pipe according to hydraulic balance. According to the household central air-conditioning water system, the opening of the gate valve is adjusted and fixed at one time according to the hydraulic balance and the water flow distribution, so that stable water flow of each fan coil is guaranteed to pass when all air-conditioning terminals are started, and the main pipeline can keep sufficient water flow when the air-conditioning terminal load is very small, and the air-conditioning main pipeline is prevented from being stopped due to high-pressure or low-pressure protection of the air-conditioning main pipeline caused by insufficient water flow.
Description
Technical Field
The utility model relates to the technical field of household central air-conditioning water systems, in particular to a household central air-conditioning water system with constant flow.
Background
Central air conditioning systems can be divided into three categories: a central air conditioning water system, a fluorine system and a wind system. The central air-conditioning water system takes water as a heat transfer medium, and mainly comprises an air-conditioning main machine, a water circulation system and a fan coil system, wherein the working principle is as follows: the air conditioner is used for cooling or heating by virtue of the air conditioner host, then the cooling capacity or heat is conveyed to the fan coil system through the water circulation system, and finally the heat is dissipated to the indoor through the fan coils of all rooms, so that the indoor refrigeration or the heating is realized.
Compared with a central air-conditioning water system of a large public building, the pipeline system of the household central air-conditioning water system is simpler, and the water pump of the central air-conditioning water system is generally larger (comprising flow and lift), so that the stability of water flow in the system is ensured by adopting a differential pressure bypass valve, the stable water flow of each fan coil can be ensured when all air-conditioning tail ends (namely fan coil systems) are started, and the main pipeline (namely a water circulation system) can maintain sufficient water flow when the tail load of the air conditioner is very small, so that heat or cold of a refrigerant cannot be taken away due to insufficient water flow, and the air-conditioning main engine is stopped due to high-pressure or low-pressure protection. However, in the actual operation process, when the end load of the air conditioner suddenly drops greatly, for example, the air conditioner in the living room, the dining room and other areas is closed at night, the differential pressure bypass valve cannot adjust the valve opening in time due to reaction delay, instantaneous flow break occurs in the main pipeline water flow, heat or cold of the refrigerant cannot be taken away, the air conditioner host fails to stop due to high-pressure or low-pressure protection, and the system operation is extremely unstable.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a household central air-conditioning water system with constant flow, which solves the conventional problems and improves the flow stability of the whole system by improving the arrangement of partial valves in the system.
The utility model is realized by adopting the following technical scheme:
a household central air-conditioning water system with constant flow comprises an air-conditioning host machine, a water supply main pipe and a water return main pipe which are connected with the air-conditioning host machine, and a plurality of fan coils which are respectively connected with the water supply main pipe and the water return main pipe; the water supply main pipe is provided with a plurality of first water supply branch pipes and at least one second water supply branch pipe, the first water supply branch pipe is provided with an electric two-way valve, a water outlet of the electric two-way valve is connected with the fan coil, the second water supply branch pipe is provided with an electric three-way valve, one water outlet of the electric three-way valve is connected with the fan coil, and the other water outlet of the electric three-way valve is connected with the backwater main pipe; the water return main pipe is connected with the water supply main pipe, the bypass pipe is close to the air conditioner main machine, the bypass pipe is provided with a gate valve, and the gate valve is used for manually adjusting the water return amount between the water supply main pipe and the water return main pipe according to hydraulic balance.
Preferably, the number of the electric three-way valves is 20% -30% of the total number of the first water supply branch pipes and the second water supply branch pipes.
Preferably, the number of the electric three-way valves is 20% of the total number of the first and second water supply branches.
Preferably, the water return header pipe is provided with a buffer water tank, a filter and a water pump in sequence along the water backflow direction, a water return port of the bypass pipe is connected with a water inlet of the buffer water tank, and a water outlet of the water pump is connected with the air conditioner host.
Preferably, the air discharge valve and the relief valve are installed at the top of buffer tank, the liquid level changer is installed to buffer tank's side, buffer tank's bottom is connected with the moisturizing pipe, automatic moisturizing valve is installed to the moisturizing pipe, automatic moisturizing valve with liquid level changer electric connection.
Preferably, the water return main pipe is provided with a first pressure transmitter in front of the water inlet of the buffer water tank, the water supply main pipe is provided with a second pressure transmitter in front of the water inlet of the bypass pipe, and the first pressure transmitter and the second pressure transmitter are matched with the electric three-way valve and the electric two-way valve to manually adjust the water return quantity between the water supply main pipe and the water return main pipe.
Preferably, the water return main pipe is located between the water return opening of the bypass pipe and the fan coil, a temperature transmitter is arranged at one end, close to the air conditioner main machine, of the water supply main pipe, and the electric regulating valve is electrically connected with the temperature transmitter.
Preferably, an expansion tank is installed at the position, close to the air conditioner main unit, of the water supply main pipe, and the expansion tank is connected with the water supply main pipe through a third water supply branch pipe.
Preferably, the fan coil is provided with an indoor temperature controller, and the indoor temperature controller is electrically connected with the electric two-way valve and the electric three-way valve.
Preferably, the household central air-conditioning water system with constant flow further comprises a control system, and the control system is electrically connected with the air-conditioning host, the fan coil, the electric two-way valve and the electric three-way valve.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the household central air-conditioning water system with constant flow, the electric three-way valve is adopted to replace the electric two-way valve used by part of fan coils, the gate valve is adopted to replace the differential pressure bypass valve in the prior art, the opening of the gate valve is manually adjusted through the cooperation of the electric two-way valve and the electric three-way valve, and the opening of the gate valve is adjusted and fixed at one time according to hydraulic balance and water flow distribution, so that the stable water flow of each fan coil is ensured to pass when all air-conditioning terminals are started, and the main pipeline can keep sufficient water flow when the air-conditioning terminal load is very small, and the air-conditioning main pipeline is prevented from being stopped due to high-pressure or low-pressure protection of an air-conditioning main machine caused by insufficient water flow, so that the flow stability of the whole system is improved.
2. The household central air-conditioning water system with constant flow can realize internal circulation refrigeration or heating of system water before the tail ends of all air conditioners are started by arranging the electric regulating valve and the temperature transmitter, and can realize the effect of rapid refrigeration or heating when one or more tail ends of the air conditioners are opened.
Drawings
FIG. 1 is a schematic flow chart of water flow in a household central air conditioning water system with constant flow rate;
fig. 2 is a schematic flow chart of the internal circulation flow in the domestic central air-conditioning water system with constant flow shown in fig. 1.
In the figure: 10. an air conditioner main unit; 20. a water supply main pipe; 21. a first water supply branch pipe; 210. an electric two-way valve; 22. a second water supply branch pipe; 220. an electric three-way valve; 23. a second pressure transmitter; 24. a temperature transmitter; 25. an expansion tank; 30. a water return main pipe; 31. a buffer water tank; 310. an exhaust valve; 311. a safety valve; 312. a liquid level transmitter; 313. a water supplementing pipe; 32. a filter; 33. a water pump; 34. a first pressure transmitter; 35. an electric control valve; 40. a fan coil; 50. a bypass pipe; 51. and a gate valve.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the description of the present utility model, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
Referring to fig. 1 and 2, a water system with constant flow for a domestic central air conditioner according to a preferred embodiment of the present utility model includes an air conditioner main 10, a water supply main 20 and a water return main 30 connected to the air conditioner main 10, and a plurality of fan coils 40 connected to the water supply main 20 and the water return main 30, respectively; the water supply main pipe 20 is provided with a plurality of first water supply branch pipes 21 and at least one second water supply branch pipe 22, the first water supply branch pipe 21 is provided with an electric two-way valve 210, the water outlet of the electric two-way valve 210 is connected with the fan coil 40, the second water supply branch pipe 22 is provided with an electric three-way valve 220, one water outlet of the electric three-way valve 220 is connected with the fan coil 40, and the other water outlet of the electric three-way valve 220 is connected with the backwater main pipe 30; a bypass pipe 50 is connected between the water return main pipe 30 and the water supply main pipe 20, the bypass pipe 50 is arranged close to the air conditioner main machine 10, a gate valve 51 is arranged on the bypass pipe 50, and the gate valve 51 is used for manually adjusting the water return amount between the water supply main pipe 20 and the water return main pipe 30 according to hydraulic balance. The electric three-way valve 220 and the electric two-way valve 210 are arranged on the branch pipes of the water supply main pipe 20, so that the influence of water pressure on the fan coil 40 can be reduced. The air conditioning main unit 10 is an air source heat pump.
According to the household central air-conditioning water system with constant flow, the electric three-way valve 220 is adopted to replace the electric two-way valve 210 used by part of the fan coils 40, the gate valve 51 is used to replace the differential pressure bypass valve in the prior art, the opening of the gate valve 51 is manually adjusted through the cooperation of the electric two-way valve 210 and the electric three-way valve 220, and the opening of the gate valve 51 is adjusted and fixed at one time according to hydraulic balance and water flow distribution, so that when all air-conditioning terminals are started, each fan coil 40 has stable water flow, and when the air-conditioning terminal load is very small, the main pipeline can keep sufficient water flow, and the air-conditioning main pipeline 10 is prevented from being stopped due to high-pressure or low-pressure protection caused by insufficient water flow, so that the flow stability of the whole system is improved.
In one embodiment, the number of the electric three-way valves 220 is 20% -30% of the total number of the first water supply branch pipes 21 and the second water supply branch pipes 22. Among these, the air conditioning end of the electric three-way valve 220 is used, typically selected to be the fan coil 40 that is not used frequently and is on the loop closest to the system's most adverse. Preferably, the number of the electric three-way valves 220 is installed to be 20% of the total number of the first water supply branch pipes 21 and the second water supply branch pipes 22. The number of the electric three-way valves 220 is an integer. Namely, through the arrangement of the electric three-way valve 220 and the gate valve 51, when the cooling and heating flow requirements of each fan coil 40 are not affected, at least the water flow reflux in the system loop is ensured, so that the stability of the system is ensured.
In this embodiment, the return water main pipe 30 is sequentially provided with the buffer water tank 31, the filter 32 and the water pump 33 along the water backflow direction, the return water port of the bypass pipe 50 is connected with the water inlet of the buffer water tank 31, the water outlet of the water pump 33 is connected with the air conditioner main unit 10, and the flow stability can be further improved through the arrangement of the buffer water tank 31. Optionally, an exhaust valve 310 and a safety valve 311 are installed at the top of the buffer water tank 31, a liquid level transmitter 312 is installed at the side edge of the buffer water tank 31, a water supplementing pipe 313 is connected to the bottom end of the buffer water tank 31, an automatic water supplementing valve is installed on the water supplementing pipe 313, and the automatic water supplementing valve is electrically connected with the liquid level transmitter 312.
The water return main pipe 30 is provided with a first pressure transmitter 34 in front of the water inlet of the buffer water tank 31, the water supply main pipe 20 is provided with a second pressure transmitter 23 in front of the water inlet of the bypass pipe 50, and the first pressure transmitter 34 and the second pressure transmitter 23 are matched with an electric three-way valve 220 and an electric two-way valve 210 to manually adjust the water return amount between the water supply main pipe 20 and the water return main pipe 30.
In another embodiment, the electric control valve 35 is disposed between the water return port of the bypass pipe 50 and the fan coil 40, the temperature transmitter 24 is disposed at one end of the water supply main 20 near the air conditioner main 10, and the electric control valve 35 is electrically connected with the temperature transmitter 24. Before all air conditioner terminals are started, internal circulation refrigeration or heating of system water can be realized, and when one or more air conditioner terminals are started, the effect of rapid refrigeration or heating can be realized, as shown in fig. 2. The electric control valve 35 may be an electric two-way valve 210 or a pneumatic control valve.
In one embodiment, as shown in fig. 1, an expansion tank 25 is installed in the water supply main 20 near the air conditioner main 10, and the expansion tank 25 is connected to the water supply main 20 through a third water supply branch pipe. The flow stability of the water supply main 20 can be further improved by the provision of the expansion tank 25.
In this embodiment, the fan coil 40 is equipped with an indoor thermostat electrically connected to the electric two-way valve 210 and the electric three-way valve 220. The working states of the electric two-way valve 210 and the electric three-way valve 220 are controlled by an indoor temperature controller.
In other embodiments, the domestic central air conditioning water system with constant flow rate further comprises a control system electrically connected with the air conditioning host 10, the fan coil 40, the electric two-way valve 210, the electric three-way valve 220, the water pump 33, the electric regulating valve 35 and the transmitters.
The manual flow constant adjusting step comprises the following steps:
1. manually closing the gate valve 51 on the bypass pipe 50 to ensure the hydraulic balance of the subsequent regulating system and ensure that the water flow at the tail end of all air conditioners meets the requirement;
2. adjusting the opening degree of the gate valve 51: after the tail end of the air conditioner is started, all the electric two-way valves 210 and the three-way valves are automatically opened, and the water flow in the pipeline enters the fan coil 40 and the air conditioner host 10, so that the air conditioner operates normally. Then, the gate valve 51 is opened gradually, the water pressure difference between both ends of the bypass pipe 50 is detected, and when the water pressure difference is 50kPa, the opening degree of the gate valve 51 is fixed (the reason why the water pressure difference is adjusted to 50kPa is because the maximum water side resistance of the general fan coil 40 does not exceed 40 kPa).
Then, checking whether the water flow at the tail end of all the air conditioners meets the index requirement. If the water flow is insufficient, the gate valve 51 is properly closed, and if the water flow meets the requirement, the opening of the gate valve 51 is fixed again. Then, in all the air conditioning ends provided with the electric two-way valve 210, only one fan coil 40 with the smallest refrigerating capacity is selected to be opened, all other air conditioning ends are closed (including the fan coil 40 communicated with the electric three-way valve 220), at the moment, the minimum water flow of the system operation occurs, and if the air conditioning host 10 keeps steady operation, the opening degree of the gate valve 51 is fixed again.
If the air conditioner main unit 10 is stopped under high pressure protection due to insufficient water flow, the opening of the gate valve 51 is properly enlarged until the air conditioner main unit 10 keeps stable operation, and the hydraulic balance and the water flow distribution are adjusted by adjusting the gate valve 51 on the bypass pipe 50 at one time. Thus, the main pipeline can keep sufficient water flow when the tail load of the air conditioner is very small, and the air conditioner host 10 is prevented from being shut down due to high-pressure protection caused by insufficient water flow.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The household central air-conditioning water system with constant flow is characterized by comprising an air-conditioning host machine, a water supply main pipe and a water return main pipe which are connected with the air-conditioning host machine, and a plurality of fan coils which are respectively connected with the water supply main pipe and the water return main pipe; the water supply main pipe is provided with a plurality of first water supply branch pipes and at least one second water supply branch pipe, the first water supply branch pipe is provided with an electric two-way valve, a water outlet of the electric two-way valve is connected with the fan coil, the second water supply branch pipe is provided with an electric three-way valve, one water outlet of the electric three-way valve is connected with the fan coil, and the other water outlet of the electric three-way valve is connected with the backwater main pipe; the water return main pipe is connected with the water supply main pipe, the bypass pipe is close to the air conditioner main machine, the bypass pipe is provided with a gate valve, and the gate valve is used for manually adjusting the water return amount between the water supply main pipe and the water return main pipe according to hydraulic balance.
2. The domestic central air-conditioning water system with constant flow rate according to claim 1, wherein the number of the electric three-way valves installed is 20% -30% of the total number of the first and second water supply branches.
3. The domestic central air-conditioning water system with constant flow rate according to claim 2, wherein the number of the electric three-way valves installed is 20% of the total number of the first and second water supply branches.
4. The domestic central air-conditioning water system with constant flow according to claim 1, wherein the water return main pipe is provided with a buffer water tank, a filter and a water pump in sequence along the water return direction, a water return port of the bypass pipe is connected with a water inlet of the buffer water tank, and a water outlet of the water pump is connected with the air-conditioning host.
5. The household central air-conditioning water system with constant flow rate according to claim 4, wherein the top of the buffer water tank is provided with an exhaust valve and a safety valve, the side edge of the buffer water tank is provided with a liquid level transmitter, the bottom end of the buffer water tank is connected with a water supplementing pipe, the water supplementing pipe is provided with an automatic water supplementing valve, and the automatic water supplementing valve is electrically connected with the liquid level transmitter.
6. The domestic central air-conditioning water system with constant flow rate according to claim 4, wherein the water return main pipe is provided with a first pressure transmitter in front of the water inlet of the buffer water tank, the water supply main pipe is provided with a second pressure transmitter in front of the water inlet of the bypass pipe, and the first pressure transmitter and the second pressure transmitter are matched with the electric three-way valve and the electric two-way valve to manually adjust the water return amount between the water supply main pipe and the water return main pipe.
7. The domestic central air-conditioning water system with constant flow according to claim 1, wherein an electric regulating valve is arranged between a water return port of the bypass pipe and the fan coil, a temperature transmitter is arranged at one end of the water supply main pipe, which is close to the air-conditioning host, and the electric regulating valve is electrically connected with the temperature transmitter.
8. The domestic central air-conditioning water system with constant flow rate according to claim 1, wherein the water supply main pipe is provided with an expansion tank near the air-conditioning main machine, and the expansion tank is connected with the water supply main pipe through a third water supply branch pipe.
9. The domestic central air-conditioning water system with constant flow rate according to claim 1, wherein the fan coil is provided with an indoor temperature controller, and the indoor temperature controller is electrically connected with the electric two-way valve and the electric three-way valve.
10. The constant flow domestic central air conditioning water system according to claim 1, further comprising a control system electrically connected to the air conditioning main unit, fan coil, electric two-way valve, electric three-way valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223167015.6U CN218972859U (en) | 2022-11-29 | 2022-11-29 | Domestic central air-conditioning water system with constant flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223167015.6U CN218972859U (en) | 2022-11-29 | 2022-11-29 | Domestic central air-conditioning water system with constant flow |
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| CN202223167015.6U Active CN218972859U (en) | 2022-11-29 | 2022-11-29 | Domestic central air-conditioning water system with constant flow |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117267816A (en) * | 2023-11-03 | 2023-12-22 | 蓝航科技(廊坊)集团有限公司 | Efficient, energy-saving and stable central air conditioner bypass system and intelligent bypass valve |
-
2022
- 2022-11-29 CN CN202223167015.6U patent/CN218972859U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117267816A (en) * | 2023-11-03 | 2023-12-22 | 蓝航科技(廊坊)集团有限公司 | Efficient, energy-saving and stable central air conditioner bypass system and intelligent bypass valve |
| CN117267816B (en) * | 2023-11-03 | 2024-07-16 | 蓝航科技(廊坊)集团有限公司 | Efficient, energy-saving and stable central air conditioner bypass system and intelligent bypass valve |
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