CN219264588U - Volumetric water heater installation module - Google Patents

Abstract

The utility model discloses a positive-displacement water heater installation module, wherein two ends of a hot water inlet pipeline are respectively provided with a first hot water inlet and a first hot water outlet, and the first hot water inlet is used for being communicated with the hot water outlet of the positive-displacement water heater; the two ends of the cold water inlet pipeline are respectively provided with a first cold water inlet, a first cold water outlet and a second cold water outlet, the first cold water inlet is communicated with a cold water source, and the second cold water outlet is communicated with a cold water inlet of the positive-displacement water heater; the water mixing unit comprises a constant-temperature water mixing valve, and the constant-temperature water mixing valve is provided with a water mixing valve cold water inlet, a water mixing valve hot water inlet and a water mixing valve water mixing outlet; two ends of the mixed water outlet pipeline are respectively provided with a mixed water inlet and a mixed water outlet; the first hot water outlet is communicated with the hot water inlet of the water mixing valve, the first cold water outlet is communicated with the cold water inlet of the water mixing valve, and the water mixing inlet is communicated with the water mixing outlet of the water mixing valve. The utility model integrates the water inlet pipeline, the water outlet pipeline and the constant temperature pipeline of the volumetric water heater, thereby realizing quick installation.

Description

Volumetric water heater installation module

Technical Field

The utility model belongs to the technical field of water heaters, and particularly relates to a positive displacement water heater installation module.

Background

Central domestic hot water systems heated by single or combined energy sources such as gas, solar energy, air energy, geothermal energy, electric energy and the like are increasingly used in large-scale or villa residences. The large-scale house or villa house has the advantages that due to the fact that the number of resident personnel and sanitary appliances is large, the daily hot water consumption is correspondingly high, and compared with the small-scale water heaters which are arranged nearby all water consumption points in a scattered mode, the central hot water system has the following remarkable advantages: the hot water supply amount is large; the combination of various heat sources is easy to realize; the temperature of hot water and the preparation time are managed uniformly and intelligently; the main equipment of the central domestic hot water system is generally installed in equipment rooms positioned in basements or roofs and areas where personnel reside less, such as balconies, outdoor equipment installation platforms and the like; the scattered laying of hot water pipelines is reduced; the full-house hot water circulation is easy to realize, the instant heating function is realized, and the use comfort of hot water is improved.

However, many problems are exposed in the practical application process, and particularly in the system installation link, the problems are more prominent and concentrated. Because the complexity of central domestic hot water systems is relatively high and no unified installation specifications and standards are currently formed in China, the final installation quality of the equipment is greatly dependent on the technology and experience of the installer. While the relevant installation practitioner is largely untrained with comprehensive, systematic training. The installation is irregular and the installation error happens sometimes, so that the use effect of the system is poor, even the conditions of water leakage and the like are damaged, and the acceptance of a user to the central domestic hot water system is directly reduced.

Therefore, the positive-displacement water heater installation module is developed, a water inlet pipeline, a water outlet pipeline and a constant-temperature pipeline of the positive-displacement water heater are integrated, the positive-displacement water heater can be installed rapidly and normally, popularization and application of a central domestic water heating system are promoted, and the technical problem to be solved is urgent.

Disclosure of Invention

Aiming at the problems pointed out in the background art, the utility model provides a positive displacement water heater installation module which integrates a water inlet pipeline, a water outlet pipeline and a constant temperature pipeline of a positive displacement water heater, can realize the rapid and standard installation of the positive displacement water heater and promotes the popularization and the application of a central domestic water heating system.

In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme:

the positive displacement water heater installation module comprises a hot water inlet pipeline, a cold water inlet pipeline, a water mixing unit and a water mixing outlet pipeline; the two ends of the hot water inlet pipeline are respectively provided with a first hot water inlet and a first hot water outlet, and the first hot water inlet is used for being communicated with the hot water outlet of the positive-displacement water heater; the two ends of the cold water inlet pipeline are respectively provided with a first cold water inlet, a first cold water outlet and a second cold water outlet, the first cold water inlet is communicated with a cold water source, and the second cold water outlet is communicated with the cold water inlet of the positive-displacement water heater; the water mixing unit comprises a constant-temperature water mixing valve, wherein the constant-temperature water mixing valve is provided with a water mixing valve cold water inlet, a water mixing valve hot water inlet and a water mixing valve water mixing outlet; the water mixing and discharging pipeline is provided with a water mixing inlet and a water mixing outlet at two ends respectively, and the water mixing outlet is used for outputting hot water for a user to use; the first hot water outlet is communicated with the hot water inlet of the water mixing valve, the first cold water outlet is communicated with the cold water inlet of the water mixing valve, and the water mixing inlet is communicated with the water mixing outlet of the water mixing valve.

In some embodiments of the present application, the domestic hot water circulating pipeline further comprises a first circulating water inlet arranged at one end, and a first circulating water outlet and a second circulating water outlet arranged at the other end; the first circulating water inlet is communicated with the mixed water outlet; the first circulating water outlet is communicated with the cold water inlet of the water mixing valve, and the second circulating water outlet is communicated with a special domestic hot water circulating port or a cold water inlet of the positive-displacement water heater.

In some embodiments of the present application, a domestic hot water circulation pump, a temperature sensor and a domestic hot water circulation controller are connected in the domestic hot water circulation pipeline, the temperature sensor is used for detecting the water temperature in the domestic hot water circulation pipeline and feeding back the temperature to the domestic hot water circulation controller, and the domestic hot water circulation controller controls the starting and stopping of the domestic hot water circulation pump according to the water temperature.

In some embodiments of the present application, the cold water inlet of the water mixing valve is provided with a first one-way valve, and cold water flows into the constant-temperature water mixing valve through the first one-way valve and the cold water inlet of the water mixing valve; the hot water inlet of the water mixing valve is provided with a second one-way valve, and hot water flowing out of the hot water outlet of the volumetric water heater enters the constant-temperature water mixing valve through the second one-way valve and the hot water inlet of the water mixing valve.

In some embodiments of the present application, a fourth one-way valve is disposed at the second cold water outlet, and the cold water source flows to the cold water inlet of the positive displacement water heater sequentially through the second cold water outlet and the fourth one-way valve.

In some embodiments of the present application, a third one-way valve is disposed at the first cold water outlet, and the cold water source flows into the thermostatic mixing valve sequentially through the first cold water outlet and the third one-way valve.

In some embodiments of the present application, a fifth one-way valve is disposed at the first circulating water outlet, and circulating water flows to the cold water inlet of the water mixing valve through the fifth one-way valve.

In some embodiments of the present application, a sixth one-way valve is provided at the second circulating water outlet, through which circulating water flows to a dedicated domestic hot water circulation port or cold water inlet of the positive displacement water heater.

In some embodiments of the present application, a thermometer is disposed at the mixed water outlet; and/or a safety relief valve is arranged in a connecting pipeline between the second cold water outlet and the cold water inlet of the positive displacement water heater; and/or an expansion tank interface is arranged in a connecting pipeline between the second cold water outlet and the cold water inlet of the positive displacement water heater, an expansion tank interface blank cap is detachably connected to the expansion tank interface, and the expansion tank interface is used for being connected with an expansion tank; and/or a pressure gauge is connected in a connecting pipeline between the second cold water outlet and the cold water inlet of the positive displacement water heater.

In some embodiments of the present application, the water dispenser further comprises a housing and a magnetic attraction cover, wherein the magnetic attraction cover can be opened and closed relative to the housing, the magnetic attraction cover is closed on the housing to form a box body, and the hot water inlet pipeline, the cold water inlet pipeline, the water mixing unit and the water mixing outlet pipeline are all arranged in the box body.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. by arranging a hot water inlet pipeline, a cold water inlet pipeline, a water mixing unit and a water mixing outlet pipeline, the cold water source is conveyed into the positive-displacement water heater through the positive-displacement water heater mounting module, and the hot water in the positive-displacement water heater is conveyed to a water point through the positive-displacement water heater mounting module;

2. through setting up the water mixing unit in positive displacement water heater installation module, integrated the function of adjusting and invariable play water temperature.

Other features and advantages of the present utility model will become apparent upon review of the detailed description of the utility model in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a front view of an embodiment of a positive displacement water heater mounting module of the present utility model;

FIG. 2 is a schematic view of the overall structure of an embodiment of a positive displacement water heater mounting module according to the present utility model;

FIG. 3 is an exploded view of the overall structure of one embodiment of a positive displacement water heater mounting module of the present utility model;

FIG. 4 is a front view showing the internal structure of an embodiment of a positive displacement water heater mounting module according to the present utility model;

FIG. 5 is a schematic view showing the overall internal structure of an embodiment of a positive displacement water heater mounting module according to the present utility model;

FIG. 6 is a schematic illustration of the use of an embodiment of a positive displacement water heater mounting module of the present utility model;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is another schematic illustration of the use of an embodiment of a positive displacement water heater mounting module of the present utility model;

FIG. 9 is a partial enlarged view at B in FIG. 8;

FIG. 10 is a schematic view of another embodiment of a positive displacement water heater mounting module according to the present utility model;

FIG. 11 is an enlarged view of a portion of FIG. 10 at C;

reference numerals:

100, a hot water inlet pipeline;

110, a first hot water inlet;

120, a first hot water outlet;

200, a cold water inlet pipeline;

210, a first cold water inlet;

211, a second ball valve;

220, a first cold water outlet;

230, a second cold water outlet;

240, a safety relief valve;

250, expansion tank interface;

260, expansion tank interface closure;

270, a pressure gauge;

300, a water mixing unit;

310, constant temperature water mixing valve;

320, a cold water inlet of the water mixing valve;

330, a hot water inlet of the mixing valve;

340, a water mixing outlet of the water mixing valve;

400, a mixed water outlet pipeline;

410, a mixed water inlet;

420, a mixed water outlet;

421, a first ball valve;

430, thermometer;

500, a positive displacement water heater;

510, a hot water outlet;

520, a cold water inlet;

530, a domestic hot water circulation port;

610, a first one-way valve;

620, a second one-way valve;

630, a third one-way valve;

640, a fourth one-way valve;

650, a fifth one-way valve;

660, a sixth one-way valve;

700, a domestic hot water circulation pipeline;

710, a first circulating water inlet;

711, third ball valve;

720, a first circulating water outlet;

730, a second circulating water outlet;

740, a domestic hot water circulating pump;

750, a temperature sensor;

760, domestic hot water cycle controller;

770, a transformer;

780, a vent tap;

790, U-shaped tube;

900, the user uses the pipeline;

910, a housing;

920, a magnetic cover;

930, water spot is used.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The positive displacement water heater is applied to a central domestic hot water system, and is increasingly widely applied to large-scale or villa residences. The positive displacement water heater applied to the central domestic hot water system is heated by single or combined energy sources such as fuel gas, solar energy, air energy, geothermal energy, electric energy and the like. Compared with small water heaters which are installed near each water consumption point, the central water heating system has the following remarkable advantages: the hot water supply amount is large; the combination of various heat sources is easy to realize; the temperature of hot water and the preparation time are managed uniformly and intelligently; the main equipment of the central domestic hot water system is generally installed in equipment rooms positioned in basements or roofs and areas where personnel reside less, such as balconies, outdoor equipment installation platforms and the like; and the scattered laying of hot water pipelines is reduced.

However, in the practical application process, a plurality of problems are exposed, and particularly in the system installation link, the problems are more prominent and concentrated. Because the complexity of central domestic hot water systems is relatively high and no unified installation specifications and standards are currently formed in China, the final installation quality of the equipment is greatly dependent on the technology and experience of the installer. While the relevant installation practitioner is largely untrained with comprehensive, systematic training. The installation is irregular and the installation error happens sometimes, so that the use effect of the system is poor, even the conditions of water leakage and the like are damaged, and the acceptance of a user to the central domestic hot water system is directly reduced.

In the present embodiment, a positive displacement water heater installation module is provided, which can be directly applied to the installation of a positive displacement water heater used in a central domestic hot water system.

In this embodiment, as shown in fig. 1, 2, 3, 4, 5, 6, and 7, the positive displacement water heater installation module includes a hot water inlet pipe 100, a cold water inlet pipe 200, a water mixing unit 300, and a water mixing outlet pipe 400.

The hot water inlet pipeline 100, the cold water inlet pipeline 200, the water mixing unit 300 and the water mixing outlet pipeline 400 are all provided with a shell 910 and a magnetic attraction cover 920 which are enclosed in a box body.

The magnetic cover 920 may be opened and closed with respect to the housing 910.

The water mixing unit 300 includes a constant temperature water mixing valve 310, and a water mixing valve cold water inlet 320, a water mixing valve hot water inlet 330, and a water mixing valve water mixing outlet 340 are provided on the constant temperature water mixing valve 310.

The volumetric water heater 500 is provided with a hot water outlet 510 of the volumetric water heater and a cold water inlet 520 of the volumetric water heater.

The hot water inlet pipe 100 is provided at both ends thereof with a first hot water inlet 110 and a first hot water outlet 120, respectively.

The hot water outlet 510 of the positive displacement water heater communicates with the first hot water inlet 110. Hot water in the positive-displacement water heater flows into the hot water inlet pipeline 100 through the hot water outlet 510 and the first hot water inlet 110 of the positive-displacement water heater.

The first hot water outlet 120 is communicated with the hot water inlet 330 of the mixing valve, and hot water in the hot water inlet pipeline 100 flows out to the hot water inlet 330 of the mixing valve through the first hot water outlet 120 and flows into the constant temperature mixing valve 310.

The cold water inlet pipe 200 is provided at both ends thereof with a first cold water inlet 210 and first and second cold water outlets 220 and 230, respectively.

The first cold water inlet 210 communicates with a cold water source that enters the cold water inlet line 200 through the first cold water inlet 210.

The first cold water outlet 220 is communicated with the cold water inlet 320 of the mixing valve, and cold water in the cold water inlet pipeline 200 flows out into the constant temperature mixing valve 310 through the first cold water outlet 220.

The second cold water outlet 230 communicates with the cold water inlet 520 of the positive displacement water heater. The cold water in the cold water inlet line 200 flows into the positive-displacement water heater through the second cold water outlet 230 and the cold water inlet 520 of the positive-displacement water heater.

A second ball valve 211 is arranged at the first cold water inlet 210, and the second ball valve 211 adopts a DN25 ball valve.

The second ball valve 211 is used to disconnect the positive displacement water heater 500 from the cold water pipe in the building for easy repair and maintenance. The second ball valve 211 arranged at the first cold water inlet 210 of the cold water inlet pipeline 200 uses a DN25 ball valve with larger nominal inner diameter, thereby being matched with the inner diameter of a cold water pipeline in a building and the water gap of the positive-displacement water heater 500, reducing water resistance and ensuring sufficient water supply flow.

The hot water flowing into the constant temperature water mixing valve 310 flows out of the hot water inlet pipeline 100 through the first hot water outlet 120 to the hot water inlet 330 of the water mixing valve, and the cold water flowing into the constant temperature water mixing valve 310 flows out of the cold water inlet pipeline 200 through the first cold water outlet 220 to the cold water mixing valve 310, and is mixed in the constant temperature water mixing valve 310.

The wax temperature sensing bulb of the temperature sensing element in the constant temperature water mixing valve 310 can drive the valve to open and close through self thermal expansion and contraction, so that the mixing proportion of cold water and hot water is adjusted in real time, hot water with constant and proper water temperature is obtained, the water temperature is more comfortable, and the use efficiency of hot water can be improved.

After being mixed in the constant temperature water mixing valve 310, hot water with proper temperature is formed and flows out through a water mixing valve water mixing outlet 340 formed on the constant temperature water mixing valve 310.

Both ends of the mixed water outlet pipe 400 are provided with a mixed water inlet 410 and a mixed water outlet 420, respectively.

The mixing valve mixing outlet 340 is communicated with the mixing inlet 410 of the mixing water outlet pipeline 400, and hot water with proper temperature in the constant temperature mixing valve 310 flows into the mixing water outlet pipeline 400 through the mixing inlet 410. And flows out through the mixed water outlet 420 of the mixed water outlet pipe 400 for the user.

Specifically, a user-used pipeline 900 is communicated between the mixed water outlet 420 and the user-used water point 930.

In the present embodiment, a first ball valve 421 is provided at the mixed water outlet 420 of the mixed water outlet pipe 400. The first ball valve 421 is a DN25 ball valve.

The first ball valve 421 serves to disconnect the positive displacement water heater 500 from the hot water pipe in the building for the convenience of repair and maintenance thereof. The first ball valve 421 provided at the mixed water outlet 420 of the mixed water outlet pipe 400 uses a DN25 ball valve having a larger nominal inner diameter, so as to match with the inner diameter of a hot water pipe in a building or a water gap of the positive-displacement water heater 500, thereby reducing water resistance and ensuring sufficient water supply flow.

The cold water inlet 320 of the mixing valve is provided with a first check valve 610, and cold water in the cold water inlet pipeline 200 flows into the constant temperature mixing valve 310 through the first cold water outlet 220, the first check valve 610 and the cold water inlet 320 of the mixing valve.

The hot water inlet 320 of the mixing valve is provided with a second one-way valve 620, and hot water in the hot water inlet pipeline 100 flows into the constant temperature mixing valve 310 through the first hot water outlet 120, the second one-way valve 620 and the hot water inlet 330 of the mixing valve.

The first check valve 610 and the second check valve 620 are respectively arranged at the cold water inlet 320 and the hot water inlet 330 of the mixing valve to prevent the cold water and the hot water flowing into the constant temperature mixing valve 310 from being excessively different in pressure and not mixing water normally.

In the present embodiment, as shown in fig. 8 and 9, a domestic hot water circulation line 700 is also provided. The domestic hot water circulation pipe 700 has a first circulation water inlet 710 at one end and a first circulation water outlet 720 and a second circulation water outlet 730 at the other end.

A third ball valve 711 is provided at the first circulating water inlet 710.

The main purpose of the domestic hot water circulation pipeline 700 is to compensate the heat dissipated by the hot water pipeline to the minimum, and only a small circulation flow rate needs to be maintained, so that the nominal inner diameter of the return water pipeline is generally small, the third ball valve 711 adopts the diameter of DN20, and the DN20 ball valve is correspondingly used.

The first circulation water inlet 710 communicates with the mixed water outlet 420 through hot water and return water pipes in the building, and all valves are in an open state at this time.

When the user does not use the positive-displacement water heater and does not have the hot water requirement, the working process of hot water circulation is carried out.

If the user opens the water point 930 at this time, the water with the reduced temperature is output, and the user needs to discharge the water in the original user use pipeline 900, so that the user can output hot water with a proper temperature, and the user cannot realize instant heating, thereby affecting the user experience. Thus, a domestic hot water circulation line 700 is also provided.

A domestic hot water circulation pump 740, a temperature sensor 750, and a domestic hot water circulation controller 760 are connected to the domestic hot water circulation line 700.

The temperature sensor 750 detects the water temperature in the domestic hot water circulation pipe 700 and feeds back the temperature to the domestic hot water circulation controller 760, and the domestic hot water circulation controller 760 controls the start or stop of the domestic hot water circulation pump 740.

The temperature sensor 750 detects the water temperature in the domestic hot water circulation pipeline 700, which is the basis for starting and stopping the domestic hot water circulation pump 740, and when the actual water temperature is less than or equal to the target temperature-return difference value, the domestic hot water circulation pump 740 is operated; when the actual water temperature is more than or equal to the target value, the domestic hot water circulation pump 740 is stopped. In order to reduce the thermal time constant of the temperature sensor 750 and make its response more sensitive, the probe water receiving installation mode is adopted in the present technical scheme.

The domestic hot water circulating pump 740 adopts a direct current brushless electric pump, has the characteristics of low noise, small volume and high lift, and can be suitable for longer hot water circulating pipelines.

The domestic hot water circulation controller 760 is connected to the domestic hot water circulation pump 740 and the temperature sensor 750, receives a temperature signal fed back by the temperature sensor 750, and starts and stops the domestic hot water circulation pump 740.

In this embodiment, a transformer 770 is further provided, and the transformer 770 converts 220V ac power into 24V dc power, and the domestic hot water circulation controller 760 can supply power to the domestic hot water circulation pump 740.

In this embodiment, the internal pipes in the positive displacement water heater installation module are each provided with an exhaust vent at a high point along the water flow direction, and an exhaust vent tap 780 is further provided at the exhaust vent. By unscrewing the vent cock 780, the air accumulation in the pipeline can be discharged, the air plug is eliminated, and the water flow, especially the hot water circulation is smooth.

As shown in fig. 8, 9, 10 and 11, the first circulating water inlet 710 communicates with the user use line 900.

The domestic hot water circulation pump 740 is turned on, and the mixed water of the user use pipe 900 flows into the domestic hot water circulation pipe 700 through the first circulation water inlet 710.

The first circulating water outlet 720 communicates with the mixing valve cold water inlet 320.

The thermostatic mixing valve 310 has an anti-scalding function, and when only hot water or cold water flows in, the thermostatic mixing valve 310 is not opened, that is, no mixed water flows out. Accordingly, the domestic hot water circulation line 700 communicates with the thermostatic mixing valve 310, thereby ensuring normal operation of the thermostatic mixing valve 310 without causing stalling of the domestic hot water circulation pump 740.

The second circulating water outlet 730 is used for communicating with the domestic hot water circulating port 530 or the cold water inlet 520 of the positive-displacement water heater, conveying domestic hot water cooled in the user use pipeline 900 back to the positive-displacement water heater 500 for heating, and the hot water obtained after heat exchange of the positive-displacement water heater 500 flows out through the hot water outlet 510 of the positive-displacement water heater 500, flows into the hot water inlet pipeline 100 through the first hot water inlet 110, flows into the constant-temperature water mixing valve 310 through the second one-way valve 620 and the water mixing valve hot water inlet 320, and is mixed with part of domestic hot water cooled in the user use pipeline 900 through the first circulating outlet 720 and the water mixing valve cold water inlet 320, so that hot water with proper temperature is output and flows out through the water mixing outlet pipeline 400 for use by a user. Therefore, the instant heating is realized, and the use experience of a user is improved.

As shown in fig. 10 and 11, in order to realize the communication between the second circulating water outlet 730 and the cold water inlet 520 of the volumetric water heater, a U-shaped pipe 790 is provided, one end of the U-shaped pipe 790 is communicated with the second circulating water outlet 730, and the other end is communicated with the reserved expansion tank interface 250, and further is communicated with the cold water inlet pipeline 200.

In other embodiments, the positive displacement water heater 500 is provided with a domestic hot water circulation port 530. The second circulation water outlet 730 is directly communicated with the domestic hot water circulation port 530.

In the present embodiment, a third check valve 630 is provided at the first cold water outlet 220. The cold water source flows into the thermostatic mixing valve 310 through the first cold water outlet 220, the third one-way valve 630. The third check valve 630 may prevent the circulating water from flowing into the cold water inlet pipe 200.

In the present embodiment, a fourth check valve 640 is provided at the second cold water outlet 230. The cold water source flows out to the cold water inlet 520 of the positive displacement heater through the second cold water outlet 230 and the fourth one-way valve 640.

The fourth check valve 640 is used to prevent the internal water body of the positive displacement water heater 500 from being heated to expand and flow back into the cold water intake pipeline 200 during the rest heating process.

In the present embodiment, a fifth check valve 650 is provided at the first circulating water outlet 720. The circulating water in the domestic hot water circulation line 700 flows to the mixing valve cold water inlet 320 through the fifth check valve 650. The fifth check valve 650 prevents the cold water source from flowing into the domestic hot water circulation line 700 through the cold water inlet line 200.

In the present embodiment, a sixth check valve 660 is provided at the second circulating water outlet 730. The circulating water in the domestic hot water circulation line 700 flows to the domestic hot water circulation port 530 or the cold water inlet port 520 of the volumetric water heater through the sixth check valve 660. The hot water inside the volumetric water heater 500 is prevented from flowing to the water consumption point through the domestic hot water circulation line 700.

In this embodiment, in order to make the assembly structure as compact as possible, the first check valve 610, the second check valve 620, the third check valve 630, the fourth check valve 640, the fifth check valve 650 and the sixth check valve 660 are embedded check valves which can be integrated inside the pipeline, and such check valves have advantages of small resistance and light weight.

In the present embodiment, a thermometer 430 is provided at the mixed water outlet 420, and the thermometer 430 is used to measure and display the water temperature outputted in the mixed water outlet pipe 400.

Specifically, the thermometer 430 is provided on the valve handle of the first ball valve 421 to display the actual water temperature of the mixed water in real time.

In the present embodiment, a safety relief valve 240 is provided in the piping of the second cold water outlet 230 and the cold water inlet 520 of the positive displacement water heater to maintain the internal pressure of the system constant and avoid overpressure.

The safety relief valve 240 is the most important safety technical accessory of the central domestic hot water system, and is forcibly installed, and its set pressure depends on the rated operating pressure of the positive-displacement hot water 500, typically 6 to 10bar. When the positive-displacement water heater 500 is in static heating, the positive-displacement water heater is a closed system, the internal water body is heated and expanded to cause the pressure of the system to rise, and the safety relief valve 240 can discharge the expanded volume out of the system, so that the pressure falls back to a safe level and is lower than the rated working pressure of the positive-displacement water heater 500. The safety relief valve 240 is disposed outside the housing 910, which is designed to facilitate connection of a drain pipe, periodic inspection, and replacement if necessary.

In the present embodiment, an expansion tank connector 250 is disposed in the pipeline between the second cold water outlet 230 and the cold water inlet 520 of the positive displacement water heater, and an expansion tank connector cover 260 is detachably connected to the expansion tank connector 250. The expansion tank interface 250 is for connection to an expansion tank. To maintain the internal pressure of the system constant, avoid overpressure, and reduce the opening of the safety relief valve 240 to some extent.

In this embodiment, a pressure gauge 270 is connected in the line between the second cold water outlet 230 and the cold water inlet 520 of the positive displacement water heater for checking the internal pressure of the positive displacement water heater 500, typically in the range of 0 to 10bar.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A positive displacement water heater mounting module, comprising:

the two ends of the hot water inlet pipeline are respectively provided with a first hot water inlet and a first hot water outlet, and the first hot water inlet is used for being communicated with the hot water outlet of the positive-displacement water heater;

the two ends of the cold water inlet pipeline are respectively provided with a first cold water inlet, a first cold water outlet and a second cold water outlet, the first cold water inlet is communicated with a cold water source, and the second cold water outlet is communicated with the cold water inlet of the positive-displacement water heater;

the water mixing unit comprises a constant-temperature water mixing valve, and the constant-temperature water mixing valve is provided with a water mixing valve cold water inlet, a water mixing valve hot water inlet and a water mixing valve water mixing outlet;

the water mixing outlet is used for outputting hot water for a user to use;

the first hot water outlet is communicated with the hot water inlet of the water mixing valve, the first cold water outlet is communicated with the cold water inlet of the water mixing valve, and the water mixing inlet is communicated with the water mixing outlet of the water mixing valve.

2. The positive-displacement water heater installation module according to claim 1, further comprising a domestic hot water circulation pipeline, one end of which is provided with a first circulating water inlet and the other end of which is provided with a first circulating water outlet and a second circulating water outlet;

the first circulating water inlet is communicated with the mixed water outlet;

the first circulating water outlet is communicated with the cold water inlet of the water mixing valve, and the second circulating water outlet is communicated with the cold water inlet of the positive-displacement water heater or the domestic hot water circulating port.

3. The positive-displacement water heater installation module according to claim 2, wherein the domestic hot water circulation pipeline is connected with a domestic hot water circulation pump, a temperature sensor and a domestic hot water circulation controller, the temperature sensor is used for detecting the water temperature in the domestic hot water circulation pipeline and feeding back the temperature to the domestic hot water circulation controller, and the domestic hot water circulation controller controls the starting and stopping of the domestic hot water circulation pump according to the water temperature.

4. The positive-displacement water heater mounting module of claim 1, wherein,

the cold water inlet of the water mixing valve is provided with a first one-way valve, and cold water flows into the constant-temperature water mixing valve through the first one-way valve and the cold water inlet of the water mixing valve;

the hot water inlet of the water mixing valve is provided with a second one-way valve, and hot water flowing out of the hot water outlet of the volumetric water heater enters the constant-temperature water mixing valve through the second one-way valve and the hot water inlet of the water mixing valve.

5. The positive-displacement water heater installation module of claim 1, wherein a fourth one-way valve is arranged at the second cold water outlet, and a cold water source flows to the cold water inlet of the positive-displacement water heater sequentially through the second cold water outlet and the fourth one-way valve.

6. The positive-displacement water heater installation module of claim 1, wherein a third one-way valve is arranged at the first cold water outlet, and a cold water source flows into the constant-temperature water mixing valve sequentially through the first cold water outlet and the third one-way valve.

7. A positive-displacement water heater installation module as claimed in claim 2, wherein a fifth one-way valve is provided at the first circulating water outlet through which circulating water flows to the cold water inlet of the mixing valve.

8. A positive-displacement water heater installation module as claimed in claim 2, wherein a sixth one-way valve is provided at the second circulating water outlet through which circulating water flows to a dedicated domestic hot water circulation port or cold water inlet of the positive-displacement water heater.

9. The positive-displacement water heater installation module according to claim 1, wherein a thermometer is provided at the mixed water outlet;

and/or a safety relief valve is arranged in a connecting pipeline between the second cold water outlet and the cold water inlet of the positive displacement water heater;

and/or an expansion tank interface is arranged in a connecting pipeline between the second cold water outlet and the cold water inlet of the positive displacement water heater, an expansion tank interface blank cap is detachably connected to the expansion tank interface, and the expansion tank interface is used for being connected with an expansion tank;

and/or a pressure gauge is connected in a connecting pipeline between the second cold water outlet and the cold water inlet of the positive displacement water heater.

10. The positive-displacement water heater installation module according to claim 1, further comprising a housing and a magnetic cover, wherein the magnetic cover can be opened and closed relative to the housing, the magnetic cover is closed on the housing to form a box body, and the hot water inlet pipeline, the cold water inlet pipeline, the water mixing unit and the water mixing outlet pipeline are all arranged in the box body.

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