Hydraulic self-balancing device suitable for various air conditioner terminals

Abstract

The invention provides a hydraulic self-balancing device suitable for various air-conditioning terminals, which comprises a shell, the shell is provided with a water supply and return port connected with a heat pump unit and a plurality of groups of water supply and return ports connected with the air-conditioning terminals, and a plurality of water supply and return loops suitable for different air-conditioning terminals are arranged in the shell. A water supply pipe of each water supply and return loop is connected with a main water supply pipe of the heat pump unit through a first reducer, a water return pipe of each water supply and return loop is connected with a main water return pipe of the heat pump unit through a second reducer, and each water supply and return loop is provided with an electric three-way valve and a reclaimed water temperature probe. According to the hydraulic self-balancing device, the temperature of supplied water entering the water supply pipe of the water supply loop and the water return loop to which each air conditioner terminal belongs is controlled through the combination of the electric three-way valve and the reclaimed water temperature probe, and the collaboration of the whole air conditioner water system is improved.

Description

Technical Field

[0001] The present invention relates to the field of air-conditioning water systems, and in particular, to a hydraulic self-balancing device applicable to various air-conditioning terminals. Background Art

[0002] A complete set of components of an air-conditioning water system (excluding cold and heat sources and air-conditioning terminal devices) is numerous, including those for heat exchange, heat storage, water mixing, distribution, transmission, etc. In order to be simple and fast in the construction and installation project and save construction time and labor input, it is very necessary to integrate these components with different functions. However, during the integration process, it is also necessary to ensure that the flow rates of each link in the distribution are compatible with the output flow rate of the cold and heat sources and the received flow rate of the terminal devices, the hydraulic conditions between each distribution loop are balanced, and the control principles of each component are also compatible with the hydraulic design. In short, true comfort should be achieved with the least energy consumption cost.

[0003] In a household radiant air-conditioning system, the ceiling radiant panel is the main radiant surface for cooling in summer. However, the sensible heat load it undertakes may not meet the usage requirements in some functional rooms due to factors such as different orientations, airtightness of doors and windows, and window-wall ratio. In this case, measures such as laying plaster capillary networks on the walls and plastic coils on the ground are required to assist in cooling. Even more, a fan coil unit is directly installed to bear the peak load demand.

[0004] To solve the actual temperature requirements of these several types of air-conditioning terminals, what is currently seen is to solve it by separately setting up mixing pump stations to supply different chilled water temperatures. Of course, in a large number of household radiant air-conditioning projects, this problem is deliberately ignored. The usual practice is either to mix the fan coil unit with the ceiling radiant panel, or to mix the ceiling radiant panel with the wall capillary network or floor heating coil, or to integrate these air-conditioning terminals into a water system under the same temperature demand.

[0005] Figure 1 Fig. shows an air-conditioning water system with separately set mixing pump stations in the prior art. This air-conditioning water system adopts a secondary water system, that is, the water circuit between the heat pump unit and the decoupling tank (or buffer tank) is used as the primary water system, and the water circuit after the decoupling tank is used as the secondary water system. As shown in the figure, there are only two forms of air-conditioning terminals, namely capillary networks and floor heating coils. If a fan coil unit and a ceiling radiant panel are added, the system pipes will be more complex, and the mixing pump station will also need to be increased. In this way, the cost input is large, there are many control elements, there are many water system circuits, and the control system is relatively complex.

[0006] Figure 2It represents a chilled water system in the prior art that combines various types of air-conditioning terminals. The problem with this chilled water system is that it ignores the differences in water temperature requirements among various air-conditioning terminals. As a result, the system can only operate according to the "most unfavorable" set temperature. For example, in summer, a fan coil unit requires 7°C low-temperature chilled water, but when the floor heating coil is used for auxiliary cooling in summer, the lowest floor temperature should not be lower than 20°C (to ensure that the floor does not condense). Then, the supply water temperature of the heat pump unit needs to be set at 20°C. However, for the fan coil unit, not only can it not dehumidify in summer, but its cooling capacity is also greatly reduced, and the coordination of the system is very poor. Summary of the Invention

[0007] To solve the above problems, the present invention provides a hydraulic self-balancing device applicable to various air-conditioning terminals. By combining an electric three-way valve and a medium water temperature probe, it controls the supply water temperature of the supply water pipe in the supply and return water circuits belonging to each air-conditioning terminal, improving the coordination of the entire chilled water system.

[0008] A hydraulic self-balancing device applicable to various air-conditioning terminals includes a housing. The housing is provided with supply and return water interfaces connected to the heat pump unit, as well as multiple groups of supply and return water interfaces connected to the air-conditioning terminals. Inside the housing, there are multiple supply and return water circuits applicable to different air-conditioning terminals. The supply water pipe of each supply and return water circuit is connected to the total supply water pipe of the heat pump unit through a first reducer, and the return water pipe of each supply and return water circuit is connected to the total return water pipe of the heat pump unit through a second reducer. An electric three-way valve and a medium water temperature probe are provided on each supply and return water circuit.

[0009] Preferably, the housing is made of thin steel plate with a thickness of 0.8 - 1 mm.

[0010] Preferably, the three-dimensional dimensions of the housing are length 1000 mm, height 800 mm, and thickness 300 mm.

[0011] Preferably, the shape of the housing is square or circular.

[0012] Preferably, the first reducer changes the pipe diameter of the heat pump unit from DN32 mm to DN25 mm and DN20 mm, and the second reducer changes the pipe diameter of the supply and return water circuits from DN25 mm and DN20 mm to DN32 mm.

[0013] Preferably, the first reducer changes the pipe diameter of the heat pump unit from DN32 mm to DN20 mm, and the second reducer changes the pipe diameter of the supply and return water circuits from DN20 mm to DN32 mm.

[0014] Preferably, it includes at least 4 groups of supply and return water interfaces connected to the air-conditioning terminals.

[0015] Preferably, the interface connection method is selected from threaded connection, press connection or hot melt welding, and the contact part between the interface and the housing is sealed.

[0016] Preferably, the hydraulic self-balancing device can be installed on the ground or suspended on the wall.

[0017] An air-conditioning water system includes a hydraulic self-balancing device and a control module applicable to multiple air-conditioning terminals as described above.

[0018] The present invention has the following beneficial effects: By adopting the hydraulic self-balancing device applicable to multiple air-conditioning terminals of the present invention, (1) the drawbacks of many and scattered components in the traditional air-conditioning water system are solved, and the system integration degree is improved; (2) the personalized requirements of several air-conditioning terminals are realized through the combination of an electric three-way regulating valve (proportional-integral regulation) and a medium water temperature probe, and self-balancing is achieved (no need to add static / dynamic balancing valves in the pipeline); (3) the "diversion and collection water parallel structure" is adopted to enable the set water supply temperature of the heat pump unit to enter the water supply sides of each air-conditioning terminal simultaneously. Description of the Drawings

[0019] Figure 1 An air-conditioning water system with a separately arranged mixing pump station; Figure 2 An air-conditioning water system that mixes multiple air-conditioning terminals together; Figure 3 A hydraulic self-balancing device applicable to multiple air-conditioning terminals of the present invention; Figure 4 An air-conditioning water system with the hydraulic self-balancing device of the present invention. Detailed Embodiments

[0020] The embodiments of the present invention will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are illustrative only and not restrictive.

[0021] Figure 3 A hydraulic self-balancing device applicable to multiple air-conditioning terminals of the present invention includes: A hydraulic self-balancing device applicable to multiple air-conditioning terminals includes a housing. The housing is provided with a total supply and return water interface connected to the heat pump unit, and multiple groups of supply and return water interfaces connected to the air-conditioning terminals. Inside the housing, multiple supply and return water circuits applicable to different air-conditioning terminals are provided. The supply pipe of each supply and return water circuit is connected to the total supply pipe of the heat pump unit through a first reducer, and the return pipe of each supply and return water circuit is connected to the total return pipe of the heat pump unit through a second reducer. An electric three-way valve and a medium water temperature probe are provided on each supply and return water circuit.

[0022] The meaning of "hydraulic self - balance" is to conduct strict design calculations according to the cooling, heating, and humidity loads of the rooms borne by the 4 types of terminals. The combination of an electric three - way regulating valve and a medium - water temperature probe is used to control the supply water temperature and flow rate entering the supply and return water circuits of each terminal, ensuring that the terminal meets the specification requirements for room temperature and humidity. The medium - water temperature refers to the supply water temperature range between the 7°C supply water temperature of a traditional chiller and the 22°C indoor heating / air - conditioning design temperature in winter / summer.

[0023] A hydraulic balance device applicable to multiple types of air - conditioning terminals in the present invention removes the decoupling tank and designs the primary water system of the heat pump host. The combination of an electric three - way regulating valve (proportional - integral regulation) and a medium - water temperature probe is used to control the supply water temperature of the supply pipe entering the supply and return water circuits of each air - conditioning terminal. The signals and action instructions generated by this control logic are all solved by a specially customized control module embedded in the heat pump unit controller.

[0024] The housing of a hydraulic balance device applicable to multiple types of air - conditioning terminals in the present invention can be made of thin steel plates with a thickness of 0.8 - 1 mm.

[0025] Optionally, the three - dimensional dimensions of the housing are a length of 1000 mm, a height of 800 mm, and a thickness of 300 mm, similar to a traditional manifold.

[0026] Figure 3 It shows the internal pipe layout of a hydraulic self - balance device applicable to multiple types of air - conditioning terminals in the present invention. As shown in the figure, different from a traditional manifold, the "manifold" is located at the upper part and the "collector" is located at the lower part, which is convenient for installing the three - way valve and the bypass pipe.

[0027] In order to be directly connected to the fan - coil terminal, a hydraulic self - balance device applicable to multiple types of air - conditioning terminals in the present invention includes a first reducer and a second reducer. The first reducer can change the pipe diameter of the heat pump unit from DN32 mm to DN40 mm for the supply and return water circuits and then reduce it to DN20 mm required by the fan - coil terminal. The supply and return pipe diameters of the other 3 types of air - conditioning terminals except the fan - coil are both DN25 mm. The second reducer changes the pipe diameter of the supply and return water circuits from DN25 mm or DN20 mm to DN32 mm.

[0028] Optionally, it includes at least 4 groups of supply and return interfaces connected to the air - conditioning terminals, corresponding to the fan - coil, floor heating coil, ceiling radiant panel, and wall capillary tube grid respectively.

[0029] Optionally, the interface connection method is selected from threaded connection, press - fitting connection, or hot - melt welding. The parts of the supply and return interfaces in contact with the housing are all sealed.

[0030] The internal bracket design of a hydraulic self-balancing device applicable to various air-conditioning terminals of the present invention, that is, the design of the bracket structure strength and stiffness can refer to the manifold, and the installation form can be selected as floor-mounted or wall-mounted.

[0031] In addition, the shape of a hydraulic self-balancing device applicable to various air-conditioning terminals of the present invention can be round or square, as long as its function can be realized. Figure 3 Only the cube is taken as an example.

[0032] The specifications of the pipeline interfaces depend on the number of various air-conditioning terminals borne, the load or loop flow rate borne. In this example, only the water supply pipe interface of the heat pump unit is taken as an example of DN32mm.

[0033] Figure 4 It represents an air-conditioning water system with a hydraulic self-balancing device applicable to various air-conditioning terminals of the present invention. As shown in the figure, an air-conditioning water system includes a hydraulic self-balancing device applicable to various air-conditioning terminals and a control module as described above. The control logic and action instructions of the electric three-way valve in a hydraulic self-balancing device applicable to various air-conditioning terminals of the present invention can be solved by the control module embedded in the heat pump unit controller.

[0034] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A hydraulic self-balancing device suitable for various air-conditioning terminals, characterized in that: It includes a shell, on which are provided supply and return water interfaces connected to the heat pump unit, and multiple groups of supply and return water interfaces connected to the air-conditioning terminals. Multiple supply and return water circuits suitable for different air-conditioning terminals are arranged inside the shell. The supply pipe of each supply and return water circuit is connected to the main water supply pipe of the heat pump unit through a first reducer, and the return water pipe of each supply and return water circuit is connected to the main return water pipe of the heat pump unit through a second reducer. Each of the supply and return water circuits is provided with an electric three-way valve and a medium water temperature probe.

2. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 1 is characterized in that: The shell is made of a thin steel plate with a thickness of 0.8-1 mm.

3. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 2 is characterized in that: The three-dimensional dimensions of the shell are 1000 mm in length, 800 mm in height and 300 mm in thickness.

4. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 1 is characterized in that: The shell is in a square or round shape.

5. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 1 is characterized in that: The first reducer changes the pipe diameter of the heat pump unit from DN32mm to DN25mm and DN20mm, and the second reducer changes the pipe diameters of the supply and return water loops from DN25mm and DN20mm to DN32mm.

6. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 1 is characterized in that: The first reducer changes the pipe diameter of the heat pump unit from DN32mm to DN20mm, and the second reducer changes the pipe diameters of the water supply and return circuits from DN20mm to DN32mm.

7. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 5 or 6, characterized in that: It comprises at least 4 groups of water supply and return interfaces connected to the air conditioner terminal.

8. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 7 is characterized in that: The connection mode of the interface is selected from threaded connection, compression connection or hot-melt welding, and the contact part between the interface and the shell is sealed.

9. The hydraulic self-balancing device applicable to various air-conditioning terminals according to claim 1 is characterized in that: The hydraulic self-balancing device can be installed on the ground or suspended on the wall.

10. An air conditioning water system, characterized in that: It comprises a hydraulic self-balancing device and a control module as described in any one of claims 1 to 9.

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