CN114811709A - 24-hour constant-temperature constant-pressure hot water equipment - Google Patents

Abstract

The invention provides a 24-hour constant-temperature and constant-pressure hot water device, which comprises: the water supply device, the circulating pipe network, the water returning device and the heating unit are in communication connection with the control center, and each device of the equipment can be manually or automatically controlled through the control center; and the device is also provided with a standby constant-pressure water supply pipe, a standby constant-pressure water supply pump, a standby constant-pressure water supply welded ball valve and a pickling device. The invention aims to provide intelligent all-weather 24-hour constant-temperature constant-pressure hot water supply equipment which is energy-saving, good in durability and good in applicability.

Description

24-hour constant-temperature constant-pressure hot water equipment

Technical Field

The invention relates to hot water supply equipment, in particular to equipment capable of supplying hot water at a constant temperature and a constant pressure for 24 hours.

Background

The 24-hour constant-temperature constant-pressure hot water equipment is equipment which is mainly used in occasions such as hotels, health-care centers and the like and can supply hot water in real time. At present, various series of hot water supply equipment of various brands are available on the market, the hot water supply equipment is common solar energy and air energy hot water supply equipment with electric auxiliary heating and natural gas hot water supply equipment, the product equipment can better meet the hot water use requirement when being used at home, but the hot water can not be supplied in real time after being opened for 24 hours when being used in commerce, particularly, the problem of customer complaint caused by poor experience feeling can be caused when a high-grade hotel or a high-end health care center is used, and the equipment needs to be provided with special equipment management and control personnel for management and control, so that the applicability, the durability and the energy saving performance are poor, and the personalized commercial service requirement is difficult to meet; with the increasing energy situation, the optimization of the performances of energy saving, durability and the like of the device is imperative.

Disclosure of Invention

The invention aims to provide intelligent all-weather 24-hour constant-temperature and constant-pressure hot water supply equipment which is energy-saving, good in durability and good in applicability.

In order to solve the above technical problem, the present invention provides a 24-hour constant temperature and constant pressure hot water apparatus, comprising: the water supply device, the circulating pipe network, the water returning device and the heating unit are in communication connection with the control center, and each device of the equipment can be manually or automatically controlled through the control center; the water supply device consists of a water storage tank, a first water inlet pipe, a first water inlet electromagnetic valve, a drainage welding ball valve, a water storage tank liquid level meter, a water storage tank temperature transmitter and a constant pressure water supply pipe, wherein one end of the constant pressure water supply pipe is connected with a water pipe in a water-using house; the first constant-pressure water supply welded ball valve and the second constant-pressure water supply welded ball valve are mainly used for daily maintenance or fault repair and the like; the other end of the first water inlet pipe is connected with the water storage tank and is provided with a first water inlet electromagnetic valve, and the first water inlet electromagnetic valve quantitatively controls tap water in the first water inlet pipe to flow into the water storage tank according to the control logic of the control center; the water storage tank liquid level meter is arranged on the outer side of the water storage tank and is used for monitoring water level data information of the water storage tank in real time and transmitting related information to the control center; the water storage tank temperature transmitter is arranged inside the water storage tank and used for monitoring the temperature of water in the water storage tank in real time and transmitting relevant information to the control center.

The backwater device consists of a heating water tank, a heating water tank liquid level meter, a heating water tank temperature transmitter, a backwater pipe, a hot water delivery pump arranged in the hot water delivery pipe, a cold water delivery welded ball valve arranged on the cold water delivery pipe and a standby water supply pipe with a second water inlet electromagnetic valve, wherein a backwater temperature transmitter, a backwater pressure transmitter and a backwater electromagnetic flow regulating valve are sequentially arranged at the joint of the backwater pipe and the heating water tank; the backwater pipe is connected with a pipe network in a building, the backwater temperature transmitter is used for monitoring the temperature of the backwater pipe in real time and transmitting data information to the control center, the backwater pressure transmitter is used for monitoring the pressure in the backwater pipe in real time and transmitting related data information to the control center, and the backwater electromagnetic flow regulating valve is used for controlling and regulating the flow of backwater according to the setting of the control center; the heating water tank liquid level meter monitors the water level in the heating water tank in real time and transmits related information to the control center.

The circulating pipe network is communicated with the water supply device, the water return device and the heating unit, is designed as a main and standby double-pipe network and comprises a front-section circulating pipe, a rear-section circulating pipe and a transfer station, the transfer station comprises a main pipe, a standby pipe, a main and standby pipe switching welding ball valve, a first main pipe welding ball valve, a main pipe circulating water pump, a second main pipe welding ball valve, a first standby pipe welding ball valve, a standby pipe circulating water pump and a second standby pipe welding ball valve, the main pipe and the standby pipe are jointed at a water inlet end and a water outlet end, the main and standby pipe switching welding ball valve is arranged at the joint of the main pipe and the standby pipe at the water inlet end, the first main pipe welding ball valve, the main pipe circulating water pump and the second main pipe welding ball valve are arranged in the main pipe, the first standby pipe welding ball valve, the standby pipe circulating water pump and the second standby pipe welding ball valve are arranged in the standby pipe, one end of the front-section circulating pipe is connected with the water storage tank, and the other end is connected with the main pipe of the transfer station, one end of the rear section circulating pipe is connected with the joint of the main pipe and the spare pipe at the water outlet end and is respectively communicated with the water storage tank and the heating water tank through the heating unit, a first electromagnetic flow regulating valve is arranged at the joint of the rear section circulating pipe and the water storage tank, and a second electromagnetic flow regulating valve is arranged at the joint of the rear section circulating pipe and the heating water tank; the first main pipe welding ball valve, the main pipe circulating water pump and the second main pipe welding ball valve are in normally open states, and the main and standby pipe switching welding ball valves are in a closed state daily, so that water in the heating water tank and the main pipes is prevented from flowing in; the first electromagnetic flow regulating valve and the second electromagnetic flow regulating valve cooperate with the main water circulating pump and the standby water circulating pump to respectively control the water amount entering the water storage tank and the heating water tank according to the setting of the control center.

A cold water delivery pipe of the water return device is communicated with a standby pipe of the transfer station, and the water return device, the standby pipe and the rear section circulating pipe can form an independent water circulation loop; the heating unit is composed of a plurality of air energy machines, the plurality of air energy machines are configured to meet the requirement of rapid heating, mechanical faults caused by long-time full-load work of the machines can be avoided, the number of the air energy machines can be selected according to the maximum water storage capacity of the water storage tank, the minimum time required for heating cold water to the required hot water temperature and the rated heating power of a single air energy machine, the heating unit calculated according to the conditions can meet the requirement of daily and emergency situations, and resource waste caused by the fact that the number of the air energy machines is too large can be avoided.

Preferably, as a further optimization and improvement, the device is further provided with a standby constant-pressure water supply pipe, a standby constant-pressure water supply pump and a standby constant-pressure water supply welding ball valve, wherein two ends of the standby constant-pressure water supply pipe are connected with the constant-pressure water supply pipe, and the standby constant-pressure water supply welding ball valve, the constant-pressure water supply pump and the second constant-pressure water supply welding ball valve are arranged side by side. When the constant-pressure water supply pump goes wrong or is repaired daily, the standby constant-pressure water supply pump and the standby constant-pressure water supply welding ball valve can be started, and normal operation of equipment is guaranteed.

Preferably, as a further optimization and improvement, the system is further provided with a pickling device, wherein the pickling device comprises a pickling water tank, a pickling water outlet pipe, a pickling water return pipe, a first pickling welding ball valve, a second pickling welding ball valve and a third pickling welding ball valve, the pickling water tank is connected with tap water, the first pickling welding ball valve is arranged at the connection position of the pickling water tank and the tap water, the pickling water outlet pipe is connected with a spare pipe of the transfer station, the second pickling welding ball valve is arranged, and the pickling water return pipe is connected with the tail end of the rear-section circulating pipe and is provided with a third pickling welding ball valve. The first pickling welding ball valve is opened, the pickling water tank is filled with water, citric acid is added into the pickling water tank, the main pipe circulating water pump is opened, the constant-pressure water supply pump is closed, the heating unit does not start a heating function, and scale and green moss in the water storage tank, the heating water tank and each pipeline can be cleaned after multiple cycles are completed according to actual needs.

Preferably, as a further optimization improvement, a cloud server is further arranged, and the control center is in communication connection with the cloud server. Due to the arrangement of the cloud server, the relevant indexes of the device can be set and real-time remote control can be realized without going out of home. Some of its advantages are as follows: by knowing the function and the working mode of each device, the utilization efficiency of resources (including but not limited to energy) can be greatly improved; a large number of tasks can be simply and efficiently completed through mutual interaction and mutual communication between the cloud server and the equipment, and manpower can be reduced to the maximum extent; through the cloud server, various data information of the equipment can be collected so as to facilitate subsequent refining and application.

Preferably, as a further optimization and improvement, the intelligent water meter is a 485 water meter. The 485 water meter can read the data of the water meter remotely, so that the management level of a management department is improved, and the management cost is reduced; it can cooperate with various users and provide different output methods and protocols to facilitate docking of various industrial and residential environments; the wired remote control valve control function can facilitate the management of departments, and realize the functions of pre-recharging, remote control and remote control recharging; the forward flow and the reverse flow of the water meter can be measured, decision reference is provided for management departments, and water stealing by users is prevented; the step water price can be realized, and the management department can charge according to the step water price conveniently; the water meter has a liquid crystal display function, and a liquid crystal display screen of the water meter displays the water purchasing quantity, the residual quantity, the accumulated quantity, the valve state, the prompt of insufficient battery power, the prompt of card error and the like; possess electromagnetic interference resistance function: when the normal measurement of the water meter is influenced by strong external electromagnetic interference, the valve of the water meter is closed, and the valve is automatically opened after the electromagnetic interference is eliminated.

Compared with the prior art, the invention has the advantages that: the heating water tank can effectively ensure that hot water in a house can be used immediately after being opened, the experience feeling is excellent, and compared with common hot water supply equipment, the equipment discharges cold water firstly and then uses hot water, so that water resources can be effectively saved on the premise of ensuring better experience feeling; the arrangement and the matching of the backwater pressure transmitter, the backwater electromagnetic flow regulating valve and the constant-pressure water supply pump can effectively ensure the water flow pressure of the water pipe in the house, and the situations of water cut-off or water flow reduction and the like can not occur even if a high floor and a plurality of people use the water pipe at the same time; the arrangement of the pickling device can effectively clean scales, green moss and the like in the water storage tank, the heating water tank and each pipeline, improve the quality of hot water supply and effectively avoid skin diseases caused by poor water quality; due to the arrangement of the cloud server, a worker can control the equipment through the cloud platform, manpower and material resources are reduced, meanwhile, the equipment can also be made into a logic scheme suitable for respective equipment operation according to actual requirements, and the applicability is better.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

FIG. 2 is a schematic diagram of the overall structure of the present invention.

FIG. 3 is a schematic view of the detailed structure of the present invention.

Figure 4 is a schematic view of the detail structure of the present invention.

Figure 5 is a schematic view of the detailed structure of the present invention.

Figure 6 is a schematic diagram of the detail of the present invention.

Figure 7 is a schematic diagram of the detail structure of the present invention.

Figure 8 is a schematic view of the detail of the present invention.

Fig. 9 is a detail view I of a part of the structure of the invention.

Fig. 10 is a detail view II of a part of the structure of the invention.

FIG. 11 is a logical diagram of the architecture of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, a 24 th-order constant temperature and constant pressure hot water apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The use of "first," "second," and the like, does not denote any order, quantity, or importance, but rather the terms first, second, and the like are used to distinguish one element from another. The use of the terms "a" and "an" or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. Likewise, the word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The 24-hour constant-temperature and constant-pressure hot water device of the embodiment, as shown in fig. 1-11, comprises: the system comprises a water supply device 1, a water return device 2, a circulating pipe network 3, a heating unit 4 and a control center 5, wherein the water supply device 1, the circulating pipe network 3, the water return device 2 and the heating unit 4 are in communication connection with the control center 5; the water supply device 1 comprises a water storage tank 11, a first water inlet pipe 12, a first water inlet electromagnetic valve 121, a drainage welded ball valve 13, a water storage tank liquid level meter 111, a water storage tank temperature transmitter 112 and a constant pressure water supply pipe 13 with one end connected with a water pipe in a water-using house, wherein the other end of the constant pressure water supply pipe 13 is connected with the water storage tank 11 and is sequentially provided with a first constant pressure water supply welded ball valve 131, a constant pressure water supply pump 132, a second constant pressure water supply welded ball valve 133 and an intelligent water meter 134, the other end of the first water inlet pipe 12 is connected with the water storage tank 11 and is provided with the first water inlet electromagnetic valve 121, the water storage tank liquid level meter 111 is arranged outside the water storage tank 11, and the water storage tank temperature transmitter 112 is arranged inside the water storage tank 11; the water return device 2 consists of a heating water tank 21, a heating water tank liquid level meter 211, a heating water tank temperature transmitter 212, a water return pipe 22, a hot water delivery pipe 23, a hot water delivery pump 231 arranged in the hot water delivery pipe 23, a cold water delivery pipe 24, a cold water delivery welded ball valve 241 arranged on the cold water delivery pipe 24 and a standby water supply pipe 25 with a second water inlet electromagnetic valve 251, wherein a water return temperature transmitter 221, a water return pressure transmitter 222 and a water return electromagnetic flow regulating valve 223 are sequentially arranged at the joint of the water return pipe 22 and the heating water tank 21; the circulating pipe network 3 is communicated with the water supply device 1, the water return device 2 and the heating unit 4, and is designed as a main and standby double-pipe network, which comprises a front circulating pipe 31, a rear circulating pipe 32 and a transfer station 33, wherein the transfer station 33 comprises a main pipe 331, a standby pipe 332, a main and standby pipe switching welding ball valve 333, a first main pipe welding ball valve 3311, a main pipe circulating water pump 3312, a second main pipe welding ball valve 3313, a first standby pipe welding ball valve 3321, a standby pipe circulating water pump 3322 and a second standby pipe welding ball valve 3323, the main pipe 331 and the standby pipe 332 are jointed at the water inlet end and the water outlet end, the main and standby pipe switching welding ball valve 333 is arranged at the joint of the main pipe 331 and the standby pipe 332 at the water inlet end, the first main pipe welding ball valve 3311, the main pipe welding ball pump 3312 and the second standby pipe welding ball valve 3313 are arranged in the main pipe 331, the first standby pipe welding ball valve 3321, the standby pipe circulating water pump 3322 and the second standby pipe welding ball valve 3323 are arranged in the standby pipe 332, one end of the front circulating pipe 31 is connected with the water storage tank 11, The other end is connected with a main pipe 331 of the transfer station 33, one end of a rear section circulating pipe 32 is connected with the joint of the main pipe 331 and a spare pipe 332 at the water outlet end and is respectively communicated with the water storage tank 11 and the heating water tank 21 after passing through the heating unit 4, a first electromagnetic flow regulating valve 321 is arranged at the joint of the rear section circulating pipe 32 and the water storage tank 11, and a second electromagnetic flow regulating valve 322 is arranged at the joint of the rear section circulating pipe 32 and the heating water tank 21; the cold water delivery pipe 24 is communicated with a standby pipe 332 of the transfer station 33; the heating unit 4 is composed of a plurality of air energy machines. And a cloud server is further arranged, and the control center 4 is in communication connection with the cloud server. And a standby constant-pressure water supply pipe 14, a standby constant-pressure water supply pump 141 and a standby constant-pressure water supply welded ball valve 142 are further provided, both ends of the standby constant-pressure water supply pipe 14 are connected with the constant-pressure water supply pipe 13, and the standby constant-pressure water supply pump 141 and the standby constant-pressure water supply welded ball valve 142 are arranged side by side with the constant-pressure water supply pump 132 and the second constant-pressure water supply welded ball valve 133. The pickling device 6 is further arranged, the pickling device 6 is composed of a pickling water tank 61, a pickling water outlet pipe 62, a pickling water return pipe 63, a first pickling welding ball valve 611, a second pickling welding ball valve 621 and a third pickling welding ball valve 622, the pickling water tank 61 is connected with tap water, the first pickling welding ball valve 611 is arranged at the connection position, the pickling water outlet pipe 62 is connected with a standby pipe 332 of the transfer station 33, the second pickling welding ball valve 621 is arranged, and the pickling water return pipe 63 is connected with the tail end of the rear-section circulating pipe 32 and provided with a third pickling welding ball valve 631. The cloud server is further arranged, and the control center is in communication connection with the cloud server. The intelligent water meter is a 485 water meter.

The specific working principle is as follows: after the equipment is installed and debugged and is started formally, after a worker sets daily rated water quantity and water supply temperature (error ranges can be set simultaneously) of the water storage tank through the control center, the first water inlet electromagnetic valve is opened, a tap water supply system supplies water to the water storage tank through the first water inlet pipe, and after water level information transmitted to the control center in real time by the water level meter of the water storage tank reaches the set water quantity, the first water inlet electromagnetic valve is closed, and water supply is stopped; the main pipe circulating water pump operates to pump out water in the water storage tank, the water flows through the front section circulating pipe, the main pipe, the first main pipe welded ball valve, the main pipe circulating water pump, the second main pipe welded ball valve and the rear section circulating pipe, enters the heating unit, is heated and then enters the water storage tank (the main pipe switching welded ball valve is in a closed state in daily life, if the main pipe or the main pipe circulating water pump is damaged or needs to be overhauled, the main pipe switching welded ball valve is opened, the first main pipe welded ball valve and the second main pipe welded ball valve are closed), and the operation is repeatedly cycled until temperature data information transmitted to a control center by the water storage tank temperature transmitter in real time reaches a set temperature and then stops; the constant pressure working shaft can start and supply the hot water in the water storage box to the water pipe in the house with hot water supply when personnel use hot water in the house, and intelligent water gauge can take notes daily hot water supply volume and give control center with relevant data information and gather the record, and the staff can look over relevant record and be used for equipment later stage operation management in high in the clouds server or control center. When the constant-pressure water supply pump goes wrong or is repaired daily, the standby constant-pressure water supply pump and the standby constant-pressure water supply welding ball valve can be started, and normal operation of equipment is guaranteed.

The backwater temperature transmitter can monitor the temperature of hot water in the backwater pipe in real time and transmit related data information to the control center, a worker sets a backwater end water temperature (can set an error range at the same time) according to the region or the requirement, and when the data monitored by the backwater temperature transmitter is lower than the set backwater end temperature, the hot water in the water pipe in the house enters the heating water tank through the backwater electromagnetic flow regulating valve; meanwhile, the backwater pressure transmitter can monitor the pressure in the backwater pipe in real time (the pressure can be set to be reasonable according to the pipe material and the pipe diameter specification in the house through the cloud server or the control center), data information is transmitted to the control center, and when the monitored pressure is lower than a set value, the constant-pressure water supply pump works to ensure that the pressures of the water supply pipe, the water pipe in the house and the backwater pipe are the same. The working personnel sets the highest water level and the lowest water level information of the heating water tank through the cloud server or the control center, sets the highest water temperature in the heating water tank (the water temperature is usually set to be the same as the water supply temperature of a water supply device), the heating water tank liquid level meter monitors the water level information in real time and transmits related data information to the control center, when the set highest water level is reached, the backup pipe circulating water pump pumps the water in the heating water tank through the cold water guide pipe, heats the water through the heating unit and then returns the water to the heating water tank through the second electromagnetic flow regulating valve (when the working logic is executed, the first electromagnetic flow regulating valve is temporarily closed), the circulation is repeated until the temperature is raised to the set highest water temperature in the heating water tank, the heating water tank temperature transmitter monitors the water temperature in real time and transmits the related data to the control center, the backup pipe circulating water pump stops working and stops the circulation heating, the control center automatically controls the hot water guiding-out water pump to start to guide hot water into the water storage tank through the hot water guiding-out pipe, and the hot water guiding-out water pump stops working when the real-time monitoring water level information transmitted to the control center by the heating water tank liquid level meter is lower than the lowest water level.

If the continuous multiple daily water consumption is less, the second scheme can be started: closing the main and standby pipe switching welding ball valve, the first main pipe welding ball valve, the main pipe circulating water pump, the second main pipe welding ball valve and the first electromagnetic flow regulating valve; setting the highest water level and the lowest water level information of the heating water tank through a cloud server or a control center, setting the highest water temperature in the heating water tank, opening a second water inlet electromagnetic valve, enabling tap water to enter the heating water tank through a standby water supply pipe, monitoring the water level information in real time by a liquid level meter of the heating water tank and transmitting related data information to the control center, pumping water in the heating water tank through a cold water outlet pipe when the set highest water level is reached, heating the water by a heating unit, returning the water to the heating water tank through a second electromagnetic flow regulating valve, repeatedly circulating the water until the temperature is raised to the set highest water temperature in the heating water tank, monitoring the water temperature in real time by a temperature transmitter of the heating water tank and transmitting related data to the control center by a temperature transmitter of the heating water tank, stopping the circulating water pump of a backup pipe when the highest water temperature is reached, stopping circulating heating, and automatically controlling the hot water outlet water pump to be started to guide hot water into a water storage tank through a hot water outlet pipe by the control center, when the real-time monitoring water level information transmitted to the control center by the heating water tank liquid level meter is lower than the lowest water level, the hot water guiding water pump stops working, meanwhile, the heating water tank can be set according to the predicted water consumption to transmit hot water to the water storage tank for several times, and therefore the hot water supply requirement can be met on the premise that the heating circulation of the water supply device is not started.

After long-time use, can carry out the pickling once monthly or every quarter, the staff opens first pickling welding ball valve, fills the pickling water tank with water, adds citric acid at the pickling water tank, opens the main pipe circulating water pump and closes the constant pressure feed water pump, and the heating unit does not open the heating function, accomplishes circulation many times or rated time according to actual need and clears up incrustation scale and green moss etc. in water storage tank, the heating water tank and each pipeline.

In conclusion, the invention comprehensively applies automatic heating, circular heating, automatic water returning, constant-pressure water supply maintaining, acid washing, cloud intelligent control, two sets of heating logic schemes and the like to the 24-hour constant-temperature and constant-pressure hot water equipment, which is not mentioned in the prior art, and the application of the related technology enables the 24-hour constant-temperature and constant-pressure hot water equipment to have many advantages, such as energy conservation, good durability, good applicability, high intelligent degree, all-weather constant-temperature and constant-pressure water supply and the like. Therefore, the invention has outstanding substantive features and obvious progress.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A 24-hour constant temperature and pressure hot water apparatus, comprising: the system comprises a water supply device, a water return device, a circulating pipe network, a heating unit and a control center, wherein the water supply device, the circulating pipe network, the water return device and the heating unit are in communication connection with the control center; the method is characterized in that: the water supply device consists of a water storage tank, a first water inlet pipe, a first water inlet electromagnetic valve, a drainage welded ball valve, a water storage tank liquid level meter, a water storage tank temperature transmitter and a constant-pressure water supply pipe, wherein one end of the constant-pressure water supply pipe is connected with a water pipe in a water-using house; the backwater device consists of a heating water tank, a heating water tank liquid level meter, a heating water tank temperature transmitter, a backwater pipe, a hot water delivery pump arranged in the hot water delivery pipe, a cold water delivery welded ball valve arranged on the cold water delivery pipe and a standby water supply pipe with a second water inlet electromagnetic valve, wherein a backwater temperature transmitter, a backwater pressure transmitter and a backwater electromagnetic flow regulating valve are sequentially arranged at the joint of the backwater pipe and the heating water tank; the circulating pipe network is communicated with the water supply device, the water return device and the heating unit, is designed as a main and standby double-pipe network and comprises a front-section circulating pipe, a rear-section circulating pipe and a transfer station, the transfer station comprises a main pipe, a standby pipe, a main and standby pipe switching welding ball valve, a first main pipe welding ball valve, a main pipe circulating water pump, a second main pipe welding ball valve, a first standby pipe welding ball valve, a standby pipe circulating water pump and a second standby pipe welding ball valve, the main pipe and the standby pipe are jointed at a water inlet end and a water outlet end, the main and standby pipe switching welding ball valve is arranged at the joint of the main pipe and the standby pipe at the water inlet end, the first main pipe welding ball valve, the main pipe circulating water pump and the second main pipe welding ball valve are arranged in the main pipe, the first standby pipe welding ball valve, the standby pipe circulating water pump and the second standby pipe welding ball valve are arranged in the standby pipe, one end of the front-section circulating pipe is connected with the water storage tank, and the other end is connected with the main pipe of the transfer station, one end of the rear section circulating pipe is connected with the joint of the main pipe and the spare pipe at the water outlet end and is respectively communicated with the water storage tank and the heating water tank through the heating unit, a first electromagnetic flow regulating valve is arranged at the joint of the rear section circulating pipe and the water storage tank, and a second electromagnetic flow regulating valve is arranged at the joint of the rear section circulating pipe and the heating water tank; the cold water delivery pipe is communicated with a standby pipe of the transfer station; the heating unit consists of a plurality of air energy machines.

2. A constant temperature and pressure hot water apparatus as claimed in claim 1, wherein: still be equipped with reserve constant pressure delivery pipe, reserve constant pressure water supply pump and reserve constant pressure water supply welding ball valve, reserve constant pressure delivery pipe both ends all meet with the constant pressure delivery pipe, reserve constant pressure water supply welding ball valve and constant pressure water supply pump, second constant pressure water supply welding ball valve set up side by side.

3. A constant temperature and pressure hot water apparatus as claimed in claim 2, wherein: the pickling device is composed of a pickling water tank, a pickling water outlet pipe, a pickling water return pipe, a first pickling welding ball valve, a second pickling welding ball valve and a third pickling welding ball valve, wherein the pickling water tank is connected with tap water, the first pickling welding ball valve is arranged at the connection position of the pickling water tank and the tap water, the pickling water outlet pipe is connected with a standby pipe of the transfer station, the second pickling welding ball valve is arranged at the standby pipe of the transfer station, and the pickling water return pipe is connected with the tail end of the rear-section circulating pipe and provided with the third pickling welding ball valve.

4. The apparatus for heating water at constant temperature and pressure as claimed in claim 2 or 3, wherein: the control center is in communication connection with the cloud server.

5. The apparatus as claimed in claim 4, wherein: the intelligent water meter is a 485 water meter.

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