WO2023020065A1 - Hydraulic center and air-conditioning circulating water system having hydraulic center - Google Patents

Abstract

The present invention relates to the field of air conditioning systems, and in particular relates to a hydraulic center and an air-conditioning circulating water system having the hydraulic center. A hydraulic center, comprising a box body, as well as a return water pipeline connected to a host, water outlet pipeline connected to the host, return water pipeline connected to a tail end, water replenishing pipeline, and at least one water outlet pipeline connected to the tail end, all of which are disposed inside the box body. A first water tank is connected between the return water pipeline connected to the host and the water outlet pipeline connected to the tail end which are inside the box body, and a second water tank is connected between the return water pipeline connected to the tail end and the water outlet pipeline connected to the host. The inner end part of the water replenishing pipeline is connected to the return water pipeline connected to the tail end or the second water tank, and the water replenishing pipeline is provided with a water replenishing valve. Two water tanks are integrated in the hydraulic center to ensure the stable operation of a device, and facilitate the layout of internal pipelines and the utilization of space.

Description

Hydraulic center and air-conditioning circulating water system with the hydraulic center technical field

The invention relates to the field of air-conditioning systems, in particular to a hydraulic center and an air-conditioning circulating water system with the hydraulic center.

Background technique

The hydraulic module integrates water pumps, valves, filters, constant pressure water replenishment devices, water pumps and electric control cabinets (almost everything except the host and terminals) in one box; it is suitable for central air-conditioning water system air-conditioning water , Cooling water, sanitary hot water circulation transportation and other water medium transportation. For existing hydraulic modules, please refer to a non-negative pressure hydraulic module for air-conditioning units involved in the Chinese utility model patent text with the announcement number "CN207797343U", and a Chinese utility model patent text with the announcement number "CN208952480U". An air conditioning hydraulic module with descaling function.

In the existing scheme, only the execution functional components in the pipeline are set in the hydraulic module. After the hydraulic module is connected to the closed circulation system, if the water distribution in the closed circulation system is not uniform, it is easy to cause the return water pipe to be sucked when the water pump is started, and at the same time, it is easy to cause the outlet pipe of the air conditioner to exist. The instantaneous pressure is too large, which leads to large fluctuations in the load of the system.

In addition, various accessories need to be installed in the air-conditioning household water machine system, and the buffer tank and the expansion tank are two of them. The buffer water tank increases the running water volume of the air conditioning system, which can effectively solve the problems of load fluctuation and frequent start and stop of the main engine caused by the system being too small.

The expansion tank plays the role of containing the water expansion of the system, which can reduce the water pressure fluctuation caused by the expansion or contraction of the system, and improve the safety and reliability of the system operation. Existing expansion tank as shown in Figure 1, the inside of the tank body 88 of the expansion tank is provided with an expansion air bag 80, the inside of the expansion air bag 80 is filled with water, and the space between the expansion air bag 80 and the tank body 88 is filled with air; The water port 87 communicates with the system, and the top of the tank body 88 is provided with an air charging port 90 . Due to the thermal expansion and contraction of water in the heating system, when the hot water heats up, the water volume in the system increases. When there is no place to accommodate this part of the expansion of the water, the water pressure in the cooling/heating system increases, which will affect the normal operation. operation; at this point the water in the system can be stored in the expansion tank. When the system leaks for some reason or the system cools down, the water pressure in the cooling/heating system drops, and the water in the expansion tank enters the system to replenish the system.

The buffer water tank and the expansion tank in the existing air-conditioning water system are two independent accessories, which occupy a large space and cause more complicated connection lines. In addition, there may be two leakage points in the expansion tank shown in Fig. 1: 1. The inflation port; 2. The pressure seal between the mouth end of the bladder and the flange.

Contents of the invention

In order to solve the above problems, the first object of the present invention is to provide a hydraulic center, in which two water tanks are integrated, to ensure stable operation of the equipment, and to facilitate the layout of internal pipelines and the utilization of space.

In order to achieve the above object, the present invention adopts the following technical solutions:

The hydraulic center includes a box body, and a return water pipeline connected to the main engine, an outlet pipeline connected to the main engine, a return water pipeline connected to the end, a water supply pipeline and at least one outlet pipeline connected to the end arranged inside the box body; The return pipe connected to the host is used to connect the water outlet of the air conditioner, the outlet pipe connected to the host is used to connect the water inlet of the air conditioner; the return pipe connected to the end is used to connect the water outlet at the end, and the outlet pipe connected to the end is used for Connect the water inlet at the end; it is characterized in that the first water tank is connected between the return water pipeline connected to the main engine inside the box and the outlet water pipeline connected to the end, and the return water pipeline connected to the end and the outlet water pipeline connected to the main engine A second water tank is connected between them; the inner end of the water supply pipeline is connected to the return water pipeline at the end or the second water tank, and a water supply valve is provided on the water supply pipeline.

The present invention adopts the above-mentioned technical solution, which relates to a hydraulic center. The return water pipeline connected to the main engine in the hydraulic center is used to connect the water outlet of the air conditioner main engine, and the water outlet pipeline connected to the main engine is used to connect to the water inlet of the air conditioner main engine; The water pipeline is used to connect the water outlet at the end, and the water outlet pipeline at the end is used to connect the water inlet at the end. In this scheme, the first water tank is connected between the return water pipeline connected to the main engine inside the tank and the outlet pipeline connected to the end, and the second water tank is connected between the return water pipeline connected to the end and the outlet water pipeline connected to the main engine; The first water tank and the second water tank are built inside the box of the hydraulic center, and after being connected to the system, the operating water volume in the air conditioning system can be increased to ensure the operation stability of the air conditioning system; on this basis, the scheme also has The following advantages:

1. This scheme sets up the first water tank and the second water tank. Compared with setting up a single water tank, the space occupied by the same capacity is smaller; furthermore, the space occupied by a single water tank is relatively deep, and the internal pipes of the hydraulic center The road layout is more restricted, while the two water tanks are more conducive to the layout of the internal pipeline of the hydraulic center and the utilization of space.

2. The second water tank is connected to the water outlet pipeline connected to the main engine, which is beneficial to ensure that there is sufficient running water in the water outlet pipeline connected to the main engine, so as to avoid the phenomenon of air suction in the water outlet pipeline connected to the main engine when the water pump is started.

3. The first water tank is set on the return water pipeline connected to the main engine, which can reduce the instantaneous water pressure in the return water pipeline connected to the main engine when the water pump is started, and alleviate the impact of high pressure liquid on the pipeline.

Preferably, an expansion air bag is arranged inside the tank of the second water tank, and the expansion air bag is used to stabilize the water pressure of the second water tank and its connecting pipeline. As mentioned in the background technology, an expansion tank is required in a traditional hydraulic center. The expansion tank can reduce the hydraulic pressure fluctuation caused by the expansion of water in the system, and improve the safety and reliability of the system operation. In this technical solution, the expansion air bag is arranged in the second water tank, that is, the expansion function of the expansion air bag is combined on the basis of the water storage function of the second water tank, thereby playing the function of an expansion tank.

That is to say, in the above solution, the expansion structure is arranged in the second water tank, which functionally combines the existing second water tank and the expansion tank, thereby simplifying the structure and reducing the occupied space of the system.

Preferably, a limit frame for limiting the range of the expansion air bag is further provided inside the second water tank; the expansion air bag is arranged in the limit frame, and a water permeable hole is provided on the limit frame. In this solution, a limit frame is used to limit the expansion area of the inflatable air bag, thereby avoiding excessive expansion of the inflatable air bag.

As a preference, a differential pressure balancing pipeline and a differential pressure balancing valve connected to the differential pressure balancing pipeline are also provided inside the box; one end of the differential pressure balancing pipeline is connected to the water outlet pipeline at the end or the first water tank On, the other end of the differential pressure balance pipeline is connected to the return water pipeline or the second water tank at the end. In this technical solution, the differential pressure balancing pipeline and the differential pressure balancing valve connected to it can keep the pressure difference between the outlet pipeline at the terminal and the return pipeline at the terminal within a certain range, avoiding two In the case of through valve switch, etc., the pressure difference is too large or too small to cause the system to run unstable.

Preferably, the water supply pipeline is provided with a flow sensor for obtaining the amount of supplementary water, the water outlet pipeline connected to the terminal or the first water tank is provided with a first pressure sensor used to obtain the water outlet pressure, and the return water pipeline connected to the terminal or the second The water tank is equipped with a second pressure sensor used to obtain the return water pressure; the controller can judge whether there is water leakage in the system based on the water replenishment amount of the flow sensor, the outlet water pressure obtained by the first pressure sensor and/or the return water pressure obtained by the second pressure sensor Condition. In this technical solution, the water replenishment pipeline is used to replenish water when the running water volume in the closed circulation system drops, the water replenishment valve on the water replenishment pipeline is used to control the switch of the water replenishment pipeline, and the flow sensor is used to obtain the replenishment water amount. Further, a first pressure sensor is installed in the hydraulic center to obtain the outlet water pressure, and a second pressure sensor is installed to obtain the return water pressure.

Based on the replenishment water volume, outlet water pressure and return water pressure obtained per unit time, the controller can judge whether the running water volume in the closed circulation system has decreased normally, and whether there is a pipeline leakage.

In a further solution, the outlet pipeline at the terminal or the first water tank is provided with a first temperature sensor for obtaining the outlet water temperature, and the return water pipeline at the terminal or the second water tank is provided with a temperature sensor for obtaining the return water temperature. The second temperature sensor; the controller can more accurately determine whether there is water leakage in the system according to the historical data of the outlet water temperature and/or return water temperature. This scheme considers that the water temperature inside the system will affect the volume and pressure of the liquid, so the scheme detects the outlet water temperature and return water temperature, and judges the influence of temperature on the water pressure based on the historical data of the outlet water temperature and/or return water temperature; When judging whether the operating water volume drop in the closed circulation system is normal, the influence of temperature on the water pressure is eliminated, and it is more accurate to judge whether there is water leakage in the system.

In a further solution, the bottom of the first water tank and/or the second water tank is provided with a drain valve, and the controller closes the replenishment valve and opens the drain valve or closes the replenishment valve when judging that there is a water leakage based on the collected data and logical reasoning And sound and light alarm.

Preferably, the top of the first water tank or the second water tank is provided with an exhaust device, the exhaust device is an automatic exhaust device or a spiral exhaust device, and the automatic exhaust device or the spiral exhaust device extends to the first water tank or the second water tank. The outside of the second water tank communicates with the outside world through the exhaust port. This scheme considers that air bubbles may be generated when the pipeline is arranged, when the pipeline is replenished, and when the operating water is heated, and the oxygen in the air bubbles is very easy to corrode the pipeline, so in the scheme, the first water tank or the second water tank Install an exhaust device on the top, which can be used to discharge the air bubbles in the pipeline and prolong the service life of the pipeline.

Preferably, the first water tank and/or the second water tank are provided with a safety valve and/or an electric heating device, and the water supply pipeline is provided with a filter and/or a check valve.

The function of the safety valve in this scheme is to discharge the medium to the outside of the system when the medium pressure inside the water tank rises above the specified value; the electric heating device is to perform auxiliary heating on the function of the air conditioner host to ensure the heating demand in winter; the filter It is used to filter the supplemented water; the check valve prevents the internal medium of the system from flowing back from the supplementary water pipeline.

Preferably, there are two water outlet pipelines connected to the terminal, and a control valve is provided on one of the water outlet pipelines connected to the terminal. In this technical solution, the two end-to-end water outlet pipes are used to connect the air-conditioning ends [such as fan coil units, floor heating and radiators, etc.], where fan coil units can be used in winter and summer, while floor heating and radiators are only used in winter . Therefore, the scheme sets at least two water outlet pipes connected to the end, and one of the water outlet pipes connected to the end can be selectively closed to control the flow direction of the internal running water.

The second object of the present invention is to provide an air-conditioning circulating water system, including an air-conditioning main unit, a hydraulic center, and a terminal; it is characterized in that: the hydraulic center of the hydraulic center is as described above; the return pipe connected to the main unit is connected to the air conditioner The water outlet of the main engine is connected to the water outlet pipeline of the main engine and connected to the water inlet of the air conditioner main engine; the return water pipeline connected to the terminal is connected to the water outlet of the terminal, and the water outlet pipeline connected to the terminal is connected to the water inlet of the terminal; the water pump is arranged on the main engine of the air conditioner and the hydraulic center or system piping.

In a further preferred solution, when the ends include fan coils, floor heating and radiators, the fan coils are connected downstream of one of the outlet pipes connected to the ends, and the floor heating and radiators are connected in parallel to the outlet pipes connected to the other end downstream. When the air-conditioning end connected to the air-conditioning circulating water system includes fan coil units, floor heating and radiators, as mentioned above, there are differences in the use seasons of fan coil units, floor heating and radiators, so the system connects the fan coil units to one of them. Connect the downstream of the water outlet pipe at the end, and connect the floor heating and radiator in parallel downstream of the other outlet pipe at the end; in the summer cooling environment, it can be closed through the control valve on the other outlet pipe at the end.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing expansion tank.

FIG. 2 is a schematic diagram of the structure of the water tank described in Embodiment 1.

FIG. 3 is a second structural schematic diagram of the water tank described in Embodiment 1. FIG.

FIG. 4 is a schematic diagram of the third structure of the water tank described in Embodiment 1.

FIG. 5 is a schematic view four of the structure of the water tank described in Embodiment 1.

FIG. 6 is a schematic diagram of the connection of the hydraulic center involved in Embodiment 2.

Fig. 7 is a schematic diagram of the connection of the circulating water system of the air conditioner involved in the third embodiment.

Fig. 8 is a schematic diagram of the connection of the hydraulic center involved in Embodiment 4.

Fig. 9 is a schematic diagram of the connection of the circulating water system of the air conditioner involved in the fifth embodiment.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientations or positional relationships indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the attached The orientation or positional relationship shown in the figure is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to this invention. Invention Limitations.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Example 1:

As shown in Figures 2 to 5, this embodiment relates to a water tank with an inflatable air bag, including a casing 9; the inside of the casing 9 is a water storage cavity, and the casing 9 is provided with at least two water storage The communicating water inlet and outlet 91; the inside of the housing 9 is also provided with an inflatable air bag 80, and the inside of the inflatable air bag is used for filling gas. The inside of the water storage chamber of the water tank is used to store water, and the water tank is provided with two water inlets and outlets 91 communicating with the water storage chamber; When the water tank is connected to the system, this part of the water circulates in the system and is used as a fluid medium; using the water tank to store water is conducive to ensuring the stability of the system, that is, stabilizing the water pressure of the water tank and its connecting pipelines. Furthermore, an expansion air bag is arranged inside the tank body of the water tank. Through the expansion and contraction of the expansion air bag, the water pressure in the tank body and the connected system can be kept in a stable range, thereby improving the safety and reliability of the system operation and playing a role The function of the existing expansion tank.

In summary, the above scheme arranges the expansion structure in the buffer water tank, which combines the existing buffer water tank and expansion tank in function, thereby simplifying the structure and reducing the occupied space of the system.

In a further embodiment, a limiting frame 81 for limiting the range of the inflatable air bag 80 is provided inside the casing 9; the inflatable air bag 80 is arranged in the limiting frame 81, and the limiting frame 81 is provided with a water-permeable hole 82 . In this technical solution, a limit frame 81 is provided inside the casing, and the inflation airbag is arranged inside the limit frame, and the range of the inflatable airbag is limited by the limit frame to avoid excessive inflation of the inflatable airbag. The limiting frame 81 is provided with a water permeable hole 82, the purpose of which is to communicate the water storage cavity of the casing with the expansion area framed by the limiting frame 81, so that the water storage cavity and the water storage cavity can be controlled based on the expansion and contraction of the inflatable air bag. The water pressure of its connecting pipeline.

As shown in FIGS. 2-4 , the limiting frame 81 is fixed inside the housing 9 , and the space enclosed by the limiting frame 81 and the inner wall of the housing 9 is the largest space for the inflatable airbag 80 to expand. In this case, the limit frame is connected and fixed on the inner wall of the casing, and the combined frame defines the expansion area of the inflatable airbag. As shown in the figure, the water inlet and outlet are opened on the casing outside the expansion area. Setting the water inlet and outlet outside the expansion area can ensure that the inflatable air bag will not block the water inlet and outlet and affect the water inlet and outlet of the shell. In a specific solution, the upper edge of the limiting frame 81 is connected to the top of the inner wall of the housing 9, and there is a gap 83 between at least part of the outer wall of the limiting frame 81 and the inner wall of the housing 9; the water inlet and outlet 91 can be arranged in the gap 83 on the side wall of the housing 9 or on the top of the housing 9 . In this technical solution, the water inlet and outlet are arranged in the gap area between the limiting frame and the inner wall of the housing, thereby avoiding the interference of the limiting frame on the water inlet and outlet and affecting the water inlet and outlet efficiency.

In addition, the inflatable airbag 80 has an inflatable assembly 92, and the inflatable airbag is fixed on the casing 9 or the upper cover plate 98; Assembly 92 is connected, so the inflatable air bag is fixed in position inside the box body.

On the basis of the above scheme, considering the disassembly and replacement of the inflatable air bag 80, the following several implementation modes can be adopted: Mode 1, as shown in Figure 2, the limit frame 81 includes an upper frame connected and fixed to the inner wall of the housing 9 frame body 84, and a detachable lower frame body 85 connected to the upper frame body 84. In this technical solution, the upper frame is connected and fixed to the inner wall of the casing, and the disassembly and replacement of the internal inflation air bag is realized through the detachable connection of the lower frame.

Mode 2 As shown in Figure 3, the limit frame 81 is an integrated frame, and the upper end of the limit frame 81 is integrally connected and fixed on the top of the inner wall of the housing 9; the top of the housing 9 is provided with an airbag disassembly port 97 and the upper cover plate 98, the air bag 80 and the inflatable assembly 92 sealingly connected with it can be disassembled through the air bag dismounting port 97 and the upper cover plate 98. In this technical solution, the limit frame is an integral frame body and is connected and fixed to the inner wall of the casing, so disassembly cannot be realized. In this case, the upper end of the housing is provided with an airbag dismounting opening 97, which can be closed by an upper cover plate 98, through which the internal inflatable airbag can be disassembled and replaced.

Mode 3 As shown in Figure 4, the housing 9 includes a cylinder 94 and a cylinder cover 95 connected to the upper end of the cylinder 94; the limit frame 81 is an open frame, and the upper edge of the limit frame 81 is fixed. It is located at the junction of the cylinder body 94 and the cylinder cover 95 . In this solution, the casing 9 is composed of a cylinder body 94 and a cylinder cover 95 on it; the limit frame is not a closed frame, and the limit frame is combined with the upper case cover to frame the expansion area of the inflatable air bag. And the limit frame and the housing are also detachably connected, which is convenient for disassembling and replacing the internal inflation air bag. When the cover 95 is combined, the spacer frame can be positioned synchronously, and the installation is also relatively convenient.

In another embodiment as shown in FIG. 5 , the limit frame 81 is arranged inside the casing 9, and the inside of the limit frame 81 constitutes a complete expansion area; the inflatable airbag 80 is completely placed in the limit frame 81 Inside. In this solution, the limiting frame 81 can be fixed inside the box body 9 . In another embodiment, the limit frame 81 is movably arranged inside the box body 9, and the limit frame 81 is suspended in the box body 9 based on the inflatable air bag 80 inside; the setting inside the water inlet and outlet 91 is useful A stopper for preventing the inflatable air bag 80 from blocking the water inlet and outlet 91 , or a structure for preventing the inflatable air bag 80 from blocking the water inlet and outlet 91 is provided outside the limiting frame 81 .

Example 2:

As shown in Figure 6, this embodiment relates to a hydraulic center, including a box body 1, and a return water pipeline 111 connected to the main engine, an outlet pipeline 112 connected to the main engine, a return water pipeline 113 connected to the end, The water replenishment pipeline 13 and at least one outlet pipeline 114 connected to the terminal; the return pipeline 111 connected to the host is used to connect the water outlet of the air conditioner host 2, and the outlet pipeline 112 connected to the host is used to connect the water inlet of the air conditioner host 2; The return water pipeline 113 at the end is used to connect the water outlet at the end, and the water outlet pipeline 114 at the end is used to connect the water inlet at the end.

In this scheme, the first water tank 3 is connected between the return water pipeline 111 connected to the main engine inside the tank 1 and the outlet pipeline 114 connected to the end, and the first water tank 3 is connected between the return water pipeline 113 connected to the end and the outlet water pipeline 112 connected to the main engine. The second water tank 4 is connected; the first water tank and the second water tank are built inside the box body of the hydraulic center, and after being connected to the system, the running water volume in the air conditioning system can be increased to ensure the operation stability of the air conditioning system; here On the basis of this, the scheme also has the following advantages:

1. This scheme sets up the first water tank and the second water tank. Compared with setting up a single water tank, the space occupied by the same capacity is smaller; furthermore, the space occupied by a single water tank is relatively deep, and the internal pipes of the hydraulic center The road layout is more restricted, while the two water tanks are more conducive to the layout of the internal pipeline of the hydraulic center and the utilization of space.

2. The second water tank is connected to the water outlet pipeline 112 connected to the main engine, which is beneficial to ensure that there is sufficient running water in the water outlet pipeline 112 connected to the main engine, so as to avoid the phenomenon of air suction in the water outlet pipeline 112 connected to the main engine when the water pump is started. .

3. The first water tank is set on the return water pipeline 111 connected to the main engine, which can reduce the instantaneous water pressure in the return water pipeline 111 connected to the main engine when the water pump is started, and alleviate the impact of high pressure liquid on the pipeline.

Specifically, as shown in the figure, there are two water outlet pipelines 114 connected to the terminal, and a control valve 115 is provided on one of the water outlet pipelines 114 connected to the terminal. The two outlet pipes 114 at the end of this technical solution are used to connect the air conditioner ends [such as fan coil units, floor heating and radiators, etc.], where the fan coils can be used in winter and summer, while the floor heating and radiators are only used in winter use. Therefore, in this solution, at least two water outlet pipes 114 connected to the end are provided, and one of the water outlet pipes 114 connected to the end can be selectively closed to control the flow direction of the internal running water.

In a further solution, the inner end of the water supply pipeline 13 is connected to the return water pipeline 113 or the second water tank 4 at the end, and the water supply pipeline 13 is provided with a water supply valve 131, a filter 134, and a flow sensor 133 and check valve 132 . The supplementary water valve 131 in this solution is used to control the on-off of the supplementary water pipeline 13, and the filter 134 is used to filter the replenished water; the check valve 132 prevents the internal medium of the system from flowing backward from the supplementary water pipeline; the flow sensor 133 is used to obtain the water replenishment amount.

The inside of the box 1 is also provided with a differential pressure balancing pipeline 14, and a differential pressure balancing valve 141 connected to the differential pressure balancing pipeline 14; one end of the differential pressure balancing pipeline 14 is connected to the outlet pipeline 114 at the end Or on the first water tank 3 , the other end of the differential pressure balance pipeline 14 is connected to the return water pipeline 113 or the second water tank 4 at the end. In this technical solution, the differential pressure balancing pipeline and the differential pressure balancing valve connected to it can keep the pressure difference between the outlet water pipeline 114 at the end and the return water pipeline 113 at the end within a certain range, avoiding air conditioning When the terminal two-way valve is switched, etc., the pressure difference is too large or too small, resulting in unstable operation of the system.

In a further preferred solution, the water outlet pipeline 114 connected to the terminal or the first water tank 3 is provided with a first pressure sensor 31 for obtaining the water outlet pressure, and the return water pipeline 113 connected to the terminal or the second water tank 4 is provided with a The second pressure sensor 41 for obtaining the return water pressure; the controller can judge whether there is water leakage in the system based on the replenishment water amount of the flow sensor 133, the outlet water pressure obtained by the first pressure sensor 31 and/or the return water pressure obtained by the second pressure sensor 41 Condition. In this technical solution, based on the replenishment water volume, outlet water pressure, and return water pressure obtained per unit time, the controller can judge whether the operating water volume in the closed circulation system has decreased normally, and whether there is a pipeline leakage.

In a more preferred solution, the outlet water pipeline 114 or the first water tank 3 connected to the terminal is provided with a first temperature sensor 32 for obtaining the outlet water temperature, and the return water pipeline 113 connected to the terminal or the second water tank 4 is provided with a There is a second temperature sensor 42 for obtaining the return water temperature; the controller can more accurately determine whether there is water leakage in the system according to the historical data of the outlet water temperature and/or the return water temperature. This scheme considers that the water temperature inside the system will affect the volume and pressure of the liquid, so the scheme detects the outlet water temperature and return water temperature, and judges the influence of temperature on the water pressure based on the historical data of the outlet water temperature and/or return water temperature; When judging whether the operating water volume drop in the closed circulation system is normal, the influence of temperature on the water pressure is eliminated, and it is more accurate to judge whether there is water leakage in the system.

In addition, as shown in the figure, the bottom of the first water tank 3 and/or the second water tank 4 is provided with a drain valve 33. When the controller judges that there is a water leakage based on the collected data and logical reasoning, the water supply valve 131 is closed and the drain valve is opened. valve 33 or close the replenishment valve 131 and sound and light alarm.

The top of the first water tank 3 or the second water tank 4 is provided with an exhaust device 34, the exhaust device 34 is an automatic exhaust device or a spiral exhaust device, and the automatic exhaust device or the spiral exhaust device extends to the first water tank 3 Or the outside of the second water tank 4 and communicate with the outside world through the exhaust port 35 . This scheme considers that air bubbles may be generated when the pipeline is arranged, when the pipeline is replenished, and when the operating water is heated, and the oxygen in the air bubbles is very easy to corrode the pipeline, so in the scheme, the first water tank or the second water tank Install an exhaust device on the top, which can be used to discharge the air bubbles in the pipeline and prolong the service life of the pipeline.

In addition, the first water tank 3 and/or the second water tank 4 are provided with a safety valve 44 and/or an electric heating device 37. The function of the safety valve in this solution is that when the pressure of the medium inside the water tank rises beyond a specified value, The medium is discharged to the outside of the system; the electric heating device 37 performs auxiliary heating on the function of the air conditioner host 2 to ensure the heating demand in winter.

Finally, the second water tank 4 in this embodiment adopts the water tank with an inflatable air bag described in Embodiment 1. In this way, the expansion airbag is arranged in the second water tank, that is, the expansion function of the expansion airbag is combined on the basis of the water storage function of the second water tank, so as to function as an expansion tank. That is to say, in the above solution, the expansion structure is arranged in the second water tank, which functionally combines the existing second water tank and the expansion tank, thereby simplifying the structure and reducing the occupied space of the system.

Example 3:

As shown in FIG. 7 , this embodiment relates to an air conditioner, especially an air conditioner circulating water system, including an air conditioner host 2 , a hydraulic center and a terminal. The hydraulic center as described in Embodiment 2, of course, also includes the water tank with an inflatable air bag in Embodiment 1. The return water pipeline 111 connected to the host is connected to the water outlet of the air conditioner host 2, and the outlet pipeline 112 connected to the host is connected to the water inlet of the air conditioner host 2; the return water pipeline 113 connected to the end is connected to the water outlet of the end, and the outlet pipeline 114 connected to the end Connect the water inlet at the end; the air conditioner main unit 2 has a built-in heat exchanger 21, and the water pump 51 is set on the air conditioner main unit 2, the hydraulic center 1 or the system pipeline.

In a further preferred solution, when the terminal includes a fan coil 52, floor heating 53 and radiator 54, the fan coil 52 is connected downstream of one of the water outlet pipelines 114 connected to the terminal, and the floor heating 53 and radiator 54 are connected in parallel at the other end. The outlet pipe 114 downstream of the root connection terminal. When the air-conditioning end connected to the air-conditioning circulating water system includes fan coil units, floor heating and radiators, as mentioned above, there are differences in the use seasons of fan coil units, floor heating and radiators, so the system connects the fan coil units to one of them. The outlet pipe 114 connected to the end is downstream, and the floor heating and radiator are connected in parallel to the downstream of the outlet pipe 114 connected to the end; The valve is closed.

Example 4:

As shown in Figure 8, this embodiment relates to a hydraulic center, including a box body 1, and a return water pipeline 111 connected to the main engine, an outlet water pipeline 112 connected to the main engine, and a return water pipeline connected to the terminal, which are arranged inside the box body 1 113. Water replenishment pipeline 13 and at least one water outlet pipeline 114 connected to the terminal; the return water pipeline 111 connected to the host is used to connect the water outlet of the air conditioner host 2, and the outlet pipeline 112 connected to the host is used to connect the water inlet of the air conditioner host 2 ; The return water pipeline 113 connected to the terminal is used to connect to the water outlet at the terminal, and the water outlet pipeline 114 connected to the terminal is used to connect to the water inlet at the terminal.

In this scheme, the second water tank 4 is connected between the return water pipeline 113 connected to the terminal inside the box body 1 and the outlet pipeline 112 connected to the main machine, and the inner end of the replenishment pipeline 13 is connected to the return water pipe connected to the terminal. Road 113 or the second water tank 4. The water tank is built inside the box of the hydraulic center, and after being connected to the system, it can increase the operating water volume in the air conditioning system and ensure the operation stability of the air conditioning system; on this basis, the water tank of this scheme is connected to the main engine The water outlet pipe is beneficial to ensure that there is sufficient running water in the water outlet pipe connected to the main engine, so as to avoid the phenomenon of air suction in the water outlet pipe connected to the main engine when the water pump is started.

Specifically, as shown in the figure, there are two water outlet pipelines 114 connected to the terminal, and a control valve 115 is provided on one of the water outlet pipelines 114 connected to the terminal. The two outlet pipes 114 at the end of this technical solution are used to connect the air conditioner ends [such as fan coil units, floor heating and radiators, etc.], where the fan coils can be used in winter and summer, while the floor heating and radiators are only used in winter use. Therefore, in this solution, at least two water outlet pipes 114 connected to the end are provided, and one of the water outlet pipes 114 connected to the end can be selectively closed to control the flow direction of the internal running water.

In a further solution, the inner end of the water supply pipeline 13 is connected to the return water pipeline 113 or the second water tank 4 at the end, and the water supply pipeline 13 is provided with a water supply valve 131, a filter 134, and a flow sensor 133 and check valve 132 . The supplementary water valve 131 in this solution is used to control the on-off of the supplementary water pipeline 13, and the filter 134 is used to filter the replenished water; the check valve 132 prevents the internal medium of the system from flowing backward from the supplementary water pipeline; the flow sensor 133 is used to obtain the water replenishment amount.

The inside of the box 1 is also provided with a differential pressure balancing pipeline 14, and a differential pressure balancing valve 141 connected to the differential pressure balancing pipeline 14; one end of the differential pressure balancing pipeline 14 is connected to the outlet pipeline 114 at the end On the top, the other end of the pressure difference balance pipeline 14 is connected to the return water pipeline 113 or the second water tank 4 at the end. In this technical solution, the differential pressure balancing pipeline and the differential pressure balancing valve connected to it can keep the pressure difference between the outlet pipeline at the terminal and the return pipeline at the terminal within a certain range, avoiding two In the case of through valve switch, etc., the pressure difference is too large or too small to cause the system to run unstable.

In a further preferred solution, the return water pipeline 111 connected to the main engine or the outlet pipeline 114 connected to the end is provided with a first pressure sensor 31 for obtaining the outlet water pressure, and the return water pipeline 113 connected to the end or the second water tank 4 There is a second pressure sensor 41 for obtaining the return water pressure; the controller can judge the system based on the replenishment water amount of the flow sensor 133, the outlet water pressure obtained by the first pressure sensor 31 and/or the return water pressure obtained by the second pressure sensor 41 Whether there is water leakage. In this technical solution, based on the replenishment water volume, outlet water pressure, and return water pressure obtained per unit time, the controller can judge whether the operating water volume in the closed circulation system has decreased normally, and whether there is a pipeline leakage.

In a more preferred solution, the outlet pipe 114 connected to the end is provided with a first temperature sensor for obtaining the outlet water temperature, and the return water pipe 113 connected to the end or the second water tank 4 is provided with a sensor for obtaining the return water temperature. The second temperature sensor 42; the controller can more accurately determine whether there is water leakage in the system according to the historical data of the outlet water temperature and/or the return water temperature. This scheme considers that the water temperature inside the system will affect the volume and pressure of the liquid, so the scheme detects the outlet water temperature and return water temperature, and judges the influence of temperature on the water pressure based on the historical data of the outlet water temperature and/or return water temperature; When judging whether the operating water volume drop in the closed circulation system is normal, the influence of temperature on the water pressure is eliminated, and it is more accurate to judge whether there is water leakage in the system.

In addition, as shown in the figure, the bottom of the second water tank 4 is provided with a drain valve 33, and when the controller judges that there is a water leakage based on the collected data and logical reasoning, the water replenishment valve 131 is closed and the drain valve 33 is opened or the water replenishment valve 131 is closed. And sound and light alarm.

The top of the second water tank 4 is provided with an exhaust device 34, the exhaust device 34 is an automatic exhaust device or a spiral exhaust device, and the automatic exhaust device or the spiral exhaust device extends to the outside of the second water tank 4 and passes through the exhaust The gas port 35 communicates with the outside world. This plan considers that air bubbles may be generated when the pipeline is arranged, when the pipeline is replenished with water, and when the operating water is heated, and the oxygen in the bubble is very easy to corrode the pipeline, so the exhaust device is installed on the water tank in the scheme. The exhaust device can be used to discharge air bubbles in the pipeline to prolong the service life of the pipeline.

In addition, the second water tank 4 is provided with a safety valve 44 and/or an electric heating device 37. The function of the safety valve in this solution is to discharge the medium to the outside of the system when the pressure of the medium inside the water tank rises above a specified value; The heating device 37 performs auxiliary heating on the function of the air conditioner host 2 to ensure the heating demand in winter.

Finally, an expansion air bag 80 is provided inside the second water tank 4 , and the expansion air bag 80 is used to stabilize the water pressure of the second water tank 4 and its connecting pipeline. As mentioned in the background technology, an expansion tank is required in a traditional hydraulic center. The expansion tank can reduce the hydraulic pressure fluctuation caused by the expansion of water in the system, and improve the safety and reliability of the system operation. In this technical solution, the expansion air bag is arranged in the water tank, that is, the expansion function of the expansion air bag is combined on the basis of the water storage function of the water tank, thereby playing the function of an expansion tank. That is to say, in the above solution, the expansion structure is arranged in the water tank, which is functionally combined with the existing water tank and expansion tank, thereby simplifying the structure and reducing the occupied space of the system.

In a further solution, the box body of the second water tank 4 is also provided with a limit frame 81 for limiting the range of the expansion air bag 80; the expansion air bag 80 is arranged in the limit frame 81, and on the limit frame 81 With permeable holes. In this solution, a limit frame is used to limit the expansion area of the inflatable air bag, thereby avoiding excessive expansion of the inflatable air bag. The limiting frame 81 is provided with a water permeable hole, the purpose of which is to make the water storage chamber of the shell communicate with the expansion area framed by the limiting frame 81, so that the water storage chamber and its expansion can be controlled based on the expansion and contraction of the inflatable air bag. Connect the water pressure of the pipeline.

Example 5:

As shown in FIG. 9 , this embodiment provides an air-conditioning circulating water system, including an air-conditioning main unit 2 , a hydraulic center and a terminal. The hydraulic center is as described in Example 8. The return water pipeline 111 connected to the host is connected to the water outlet of the air conditioner host 2, and the outlet pipeline 112 connected to the host is connected to the water inlet of the air conditioner host 2; the return water pipeline 113 connected to the end is connected to the water outlet of the end, and the outlet pipeline 114 connected to the end Connect the water inlet at the end; the air conditioner main unit 2 has a built-in heat exchanger 21, and the water pump 51 is set on the air conditioner main unit 2, the hydraulic center 1 or the system pipeline.

In a further preferred solution, when the terminal includes a fan coil 52, floor heating 53 and radiator 54, the fan coil 52 is connected downstream of one of the water outlet pipelines 114 connected to the terminal, and the floor heating 53 and radiator 54 are connected in parallel at the other end. The outlet pipe 114 downstream of the root connection terminal. When the air-conditioning end connected to the air-conditioning circulating water system includes fan coil units, floor heating and radiators, as mentioned above, there are differences in the use seasons of fan coil units, floor heating and radiators, so the system connects fan coil units to one of them. The outlet pipe 114 connected to the end is downstream, and the floor heating and radiator are connected in parallel to the downstream of the outlet pipe 114 connected to the end; The valve is closed.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limitations to the present invention. Variations, modifications, substitutions, and modifications to the above-described embodiments are possible within the scope of the present invention.

Claims (18)

1. The hydraulic center includes a box body (1), and a return water pipeline (111) connected to the main engine, an outlet pipeline (112) connected to the main engine, a return water pipeline (113) connected to the end, Water replenishment pipeline (13) and at least one water outlet pipeline (114) connected to the end; the return water pipeline (111) connected to the main engine is used to connect the water outlet of the air conditioner main engine (2), and the water outlet pipeline (112) connected to the main engine It is used to connect the water inlet of the air conditioner host (2); the return water pipeline (113) connected to the terminal is used to connect the water outlet of the terminal, and the water outlet pipeline (114) connected to the terminal is used to connect the water inlet of the terminal; it is characterized in that; The first water tank (3) is connected between the return water pipeline (111) connected to the main engine inside the box (1) and the outlet pipeline (114) connected to the end, and the first water tank (3) is connected between the return water pipeline (113) connected to the end and the water outlet pipeline (113) connected to the main engine. The second water tank (4) is connected between the water outlet pipelines (112); the inner end of the water supply pipeline (13) is connected to the return water pipeline (113) or the second water tank (4) at the end, A replenishment valve (131) is provided on the replenishment pipeline (13).
2. The hydraulic center according to claim 1, characterized in that: the second water tank (4) includes a casing (9); the inside of the casing (9) is a water storage cavity, and at least There are two water inlets and outlets (91) communicating with the water storage chamber; an inflatable air bag (80) is also arranged inside the housing (9), and the inside of the inflatable air bag is used for filling gas; the water inlet and outlet are opened at the bottom of the inflatable air bag (80) On the inner wall of the housing outside the expansion area; the expansion air bag (80) is used to stabilize the water pressure of the second water tank (4) and its connecting pipeline.
3. The hydraulic center according to claim 2, characterized in that: the inside of the second water tank (4) is also provided with a limit frame (81) for limiting the range of the expansion air bag (80); the expansion The air bag (80) is arranged in the limiting frame (81), and the limiting frame (81) is provided with a water permeable hole (82).
4. The hydraulic center according to claim 3, characterized in that: the expansion air bag (80) has an inflatable component (92), and the expansion air bag is fixed on the casing (9) or the upper cover (98); Position frame (81) is fixed on housing (9) inside, and the space that limit frame (81) and housing (9) inwall or upper cover plate (98) enclose constitutes is the maximum space that inflatable air bag (80) expands.
5. The hydraulic center according to claim 4, characterized in that: the upper edge of the limit frame (81) is connected to the top of the inner wall of the casing (9), and at least part of the outer wall of the limit frame (81) is connected to the casing (9) ) there is a gap (83) between the inner walls; the water inlet and outlet (91) can be arranged on the side wall of the housing (9) corresponding to the gap (83) or on the top of the housing (9).
6. The hydraulic center according to claim 5, characterized in that: the limit frame (81) includes an upper frame body (84) connected and fixed to the inner wall of the housing (9), and an upper frame body (84) connected to the upper frame body (84) Removable lower frame (85).
7. The hydraulic center according to claim 5, characterized in that: the limit frame (81) is an integrated frame body, and the upper end of the limit frame (81) is integrally connected and fixed on the top of the inner wall of the casing (9); The top of the housing (9) is provided with an air bag disassembly port (97) and an upper cover plate (98), the air bag (80) and the inflatable assembly (92) sealingly connected with it can pass through the air bag disassembly port (97) and the upper cover plate (98). The cover plate (98) is removed.
8. The hydraulic center according to claim 3, characterized in that: the housing (9) includes a cylinder (94), and a cylinder cover (95) connected to the upper end of the cylinder (94); the limit frame ( 81) is an open frame body, and the upper edge of the limit frame (81) is fixed at the junction of the cylinder body (94) and the cylinder cover (95).
9. The hydraulic center according to claim 3, characterized in that: the limit frame (81) is arranged inside the casing (9), and the inside of the limit frame (81) constitutes a complete expansion area; the expansion air bag (80 ) is completely placed in the limit frame (81).
10. The hydraulic center according to claim 1, characterized in that: the tank (1) is also provided with a differential pressure balancing pipeline (14), and a differential pressure balancing pipeline (14) connected to the differential pressure balancing pipeline (14) Valve (141); one end of the differential pressure balance pipeline (14) is connected to the water outlet pipeline (114) or the first water tank (3) at the terminal, and the other end of the differential pressure balance pipeline (14) is connected to the terminal on the return water line (113) or the second water tank (4).
11. The hydraulic center according to claim 1, characterized in that: the water replenishment pipeline (13) is provided with a flow sensor (133) for obtaining the amount of replenishment water, connected to the outlet pipeline (114) at the end or the first water tank ( 3) A first pressure sensor (31) for obtaining the outlet water pressure is provided on the top, and a second pressure sensor (41) for obtaining the return water pressure is provided on the return water pipeline (113) connected to the end or the second water tank (4) The controller can judge whether there is water leakage in the system based on the amount of water supplemented by the flow sensor (133), the outlet water pressure obtained by the first pressure sensor (31) and/or the return water pressure obtained by the second pressure sensor (41).
12. The hydraulic center according to claim 11, characterized in that: the outlet pipeline (114) or the first water tank (3) connected to the terminal is provided with a first temperature sensor (32) for obtaining the temperature of the outlet water, and the terminal connected to the terminal The return water pipeline (113) or the second water tank (4) is provided with a second temperature sensor (42) for obtaining the return water temperature; the controller judges more accurately based on the historical data of the outlet water temperature and/or return water temperature Check for water leaks in the system.
13. The hydraulic center according to claim 11 or 12, characterized in that: the bottom of the first water tank (3) and/or the second water tank (4) is provided with a drain valve (33), and the controller is based on the collected data and When logical reasoning judges that there is a water leakage situation, close the replenishment valve (131) and open the drain valve (33) or close the replenishment valve (131) and sound and light alarm.
14. The hydraulic center according to claim 1, characterized in that: the top of the first water tank (3) or the second water tank (4) is provided with an exhaust device (34), and the exhaust device (34) is an automatic exhaust The device or the spiral exhaust device, the automatic exhaust device or the spiral exhaust device extend to the outside of the first water tank (3) or the second water tank (4) and communicate with the outside through the exhaust port (35).
15. The hydraulic center according to claim 1, characterized in that: the first water tank (3) and/or the second water tank (4) are provided with a safety valve (44) and/or an electric heating device (37) to replenish water The pipeline (13) is provided with a filter (134) and/or a check valve (132).
16. The hydraulic center according to claim 1, characterized in that there are two outlet pipes (114) connected to the end, and a control valve (115) is provided on one of the outlet pipes (114) connected to the end.
17. An air-conditioning circulating water system, comprising an air-conditioning host (2), a hydraulic center and a terminal; it is characterized in that: the hydraulic center of the hydraulic center is as described in any one of claims 1-15; the return pipe connected to the main engine Road (111) is connected to the water outlet of the air-conditioning main unit (2), and the water outlet pipeline (112) connected to the main unit is connected to the water inlet of the air-conditioning main unit (2); The water pipeline (114) is connected to the water inlet at the end; the water pump (51) is arranged on the air conditioner main unit (2), the hydraulic center (1) or the system pipeline.
18. An air-conditioning circulating water system, comprising an air-conditioning host (2), a hydraulic center and a terminal; it is characterized in that: the hydraulic center of the hydraulic center is the hydraulic center according to claim 16; the return water pipeline (111) connected to the host is connected to The water outlet of the air conditioner main unit (2), connect the water outlet pipe (112) of the main unit to the water inlet of the air conditioner main unit (2); connect the return water pipe (113) at the end to the water outlet at the end, and connect the water outlet pipe (114) at the end Connect the water inlet at the end; the water pump (51) is arranged on the air conditioner main unit (2), the hydraulic center (1) or the system pipeline; the end includes a fan coil unit (52), floor heating (53) and a radiator (54 ), the fan coil unit (52) is connected downstream of one of the outlet pipelines (114) connected to the end, and the floor heating (53) and the radiator (54) are connected in parallel to the downstream of the outlet pipeline (114) connected to the other terminal.

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