CN204254713U - The distribution of a kind of user side stores hot water supply system - Google Patents

Abstract

The utility model discloses a user-side distributed storage hot water supply system, which comprises a main water tank with a heat source, a water supply pipeline provided with a hot water pump, a user-side water equipment and a circulating water supply system formed by a circulation pipe. The side water equipment is equipped with a back pressure variable capacity hot water tank, which is connected to the water supply pipe through the water supply branch pipe; the circulation pipe is connected with a water replenishment pipe, and a check valve is installed on the water replenishment pipe; each user’s side water The back pressure variable capacity hot water tanks of the equipment are all equipped with water replenishment limit switches, and each water replenishment limit switch is connected in series to the hot water pump through the water replenishment limit signal line; all will start the operation of the hot water pump; the utility model greatly reduces the circulation pipe network The hot water circulation time can reduce the heat consumption of the circulation pipe network and the power consumption of the water pump during the hot water transmission and distribution process.

Description

A user-side distributed storage hot water supply system

technical field

The invention relates to the technical field of centralized hot water supply systems, in particular, the invention relates to a user-side distributed storage hot water supply system.

Background technique

With the continuous improvement of living standards and energy-saving and environmental protection requirements, the application of centralized or semi-centralized hot water supply systems is becoming more and more common. By replacing the decentralized hot water supply method of electric water heaters with pure electric energy as the heat source, the application places of centralized and semi-centralized hot water supply systems are gradually being popularized from traditional important public buildings, hotels, high-end office buildings, etc. to apartments and residential buildings. Therefore, improving the energy-saving and water-saving efficiency of centralized or semi-centralized hot water supply systems is of great significance to national energy conservation and emission reduction.

Existing technical solution 1: As shown in Fig. 1, the current typical hot water supply system is mainly composed of heat source 1, main water tank 2, hot water pump 3, water supply pipe 4, user-side water equipment 5, circulation pipe 6 and other parts. Its operating principle is that the hot water in the main water tank 2 is transported by the hot water pump 3 to the water equipment 5 on the user side through the hot water supply pipe 4; A circulation pipe 6 is provided to form a circulation pipe network, so that hot water can circulate through the main water tank 2 to replenish the lost heat without interruption.

Disadvantages of the existing technical scheme 1: In order to ensure that the temperature of the supplied hot water meets the specification design requirements at any time, the hot water needs to circulate continuously in the circulation pipe network for a long time, which increases the operating energy consumption of the hot water pump 3; The outer surface area of the net is large, resulting in a large amount of heat loss in the circulation pipe network. In order to reduce the loss of thermal and electric energy due to hot water circulation, some users have adopted management measures to limit the use of water during peak hours, but this will cause serious inconvenience to water use.

The second prior art solution: as shown in Figure 2, in some small and medium-sized hot water supply projects, especially renovation projects, the project cost is reduced, the project construction is facilitated, and the circulation pipe 6 is canceled to simplify the circulation pipe network. Its operating principle is as follows: the hot water in the main water tank 2 is delivered to the water equipment 5 on each user side by the hot water pump 3 through the water supply pipe 4 .

Disadvantages of the existing technical solution 2: In order to ensure the hot water supply, when the hot water is used intermittently on the user side, it is often necessary to discharge the cold water in the water supply pipe section between the heat source and the hot water equipment, resulting in waste of water and heat.

Solution 3 of the prior art: This solution is another improvement of Solution 2, and its solution is to lay an electrothermal film between the insulation material of the water supply pipe 4 and the pipe. When the water temperature in the pipe is lower than the design requirement, the electrothermal film is energized to ensure the water temperature at 5 places of the user side water equipment.

Disadvantages of the existing technical scheme three: In order to ensure that the temperature of the hot water supply meets the design requirements at any time, it is often necessary to use an electric heating film to heat the hot water in the water supply pipe to supplement the heat loss, but it is the heat source for maintaining the water temperature of the water supply pipe network Because of electricity, the cost of heat production is high.

Contents of the invention

The purpose of the present invention is to provide a user-side distributed storage hot water supply that reduces the heat lost during the circulation of the hot water in the transmission and distribution pipeline network and the power loss of the circulating water pump in a typical centralized or semi-centralized hot water supply system system.

The technical solution provided by the present invention is: a user-side distributed storage hot water supply system, including a main water tank with a heat source, a water supply pipeline with a hot water pump, a user-side water equipment and a circulating water supply system formed by a circulation pipe. The user-side water equipment described above is equipped with a back-pressure variable-capacity hot water tank, and the back-pressure variable-capacity hot water tank is connected to the water supply pipe through a water supply branch pipe; the circulation pipe is connected to a water supply pipe, and a check valve is provided on the water supply pipe; The back-pressure variable-capacity hot water tanks of the water supply equipment on the user side are equipped with water supply limit switches, and each water supply limit switch is connected in series to the hot water pump through the water supply limit signal line; wherein, the back-pressure variable-capacity hot water tank includes a thermal insulation The box body is divided into a hot water chamber and a back pressure chamber by an adiabatic partition. The top of the hot water chamber is provided with a water supply limit switch, and one side of the hot water chamber is provided with a hot water outlet connected to the water equipment on the user side. Water pipe, the other side is provided with a water inlet pipe, the water inlet pipe is connected with the water supply branch pipe through the temperature control three-way valve; the back pressure chamber is connected with the circulation pipe through the pressure balance pipe, and the pressure balance pipe is connected to the temperature control three-way valve through a bypass pipe;

After the water supply limit switch of any user-side back pressure variable capacity hot water tank sends out a signal, the system hot water pump starts, the pressure of the water supply pipe rises, and the temperature control three-way valve is connected to the port connected to the water supply branch pipe and the bypass pipe. The cold water in the water supply pipe flows into the circulation pipe through the bypass pipe and the pressure balance pipe; after the cold water is emptied, the water temperature rises, the temperature control three-way valve acts to close the bypass pipe, the water supply branch pipe is connected to the water inlet pipe, and the hot water flows in The hot water chamber is full; the heat insulation is broken during the water filling process; driven by the pressure difference between the upper and lower ends, it gradually moves down to the bottom, and the water replenishment is completed; after the water replenishment is completed, the flow of hot water in the water supply pipe drops to zero, and the hot water pump In the idling state, the motor current drops, a signal to stop the pump is generated, and the heat supply pump stops.

The hot water outlet pipe is connected to a temperature-controlled heating pipe, the temperature-controlled heating pipe includes an adiabatic casing, one side of the adiabatic casing is provided with a water outlet to communicate with the hot water outlet pipe, and the other side of the adiabatic casing is provided with a water inlet , a temperature-controlled heating element and a temperature-measuring element are installed in the heat-insulating shell; when the hot water temperature is normal, the tubular temperature-controlled heating element is in a power-off state, and the temperature of the hot water in the back pressure variable capacity hot water tank is lower than the minimum set temperature At this time, the water flow flowing through the tubular temperature-controlled heating element from the water inlet will cool the temperature-measuring element to make the circuit of the tubular temperature-controlled heating element conduct, and the water flow will be heated.

An upper limit positioning ring is also provided in the hot water chamber.

The beneficial effects of the present invention are:

The invention greatly reduces the hot water circulation time of the circulation pipe network, reduces the heat consumption of the circulation pipe network and the power consumption of the water pump during the hot water transmission and distribution process. In the present invention, only the water temperature in the water supply pipe network is normal during the water supply period. After the water supply is completed, the hot water in the circulation pipe network no longer flows, and the water temperature gradually drops to the ambient temperature. In addition, because the circulation pipe does not consume heat, the heat consumption flow of the pipe network is in the water replenishment process. The period is roughly half of the technical scheme one, and the water temperature in the water supply pipe decreases gradually to zero during the non-supplementary water period. Therefore, the present invention has significant advantages in reducing the energy consumption of the pipe network and the power consumption of the water pump.

Description of drawings

A more complete and better understanding of the invention, and many of its attendant advantages, will readily be learned by reference to the following detailed description when considered in conjunction with the accompanying drawings, but the accompanying drawings illustrated herein are intended to provide a further understanding of the invention and constitute A part of the present invention, the exemplary embodiment of the present invention and its description are used to explain the present invention, and do not constitute an improper limitation of the present invention, wherein:

Fig. 1 is a schematic structural diagram of a technical solution of the prior art;

Fig. 2 is a schematic structural diagram of technical solution two of the prior art;

Fig. 3 is a structural representation of the present invention;

Fig. 4 is a schematic structural view of the back pressure variable capacity hot water tank in Fig. 3;

Fig. 5 is a schematic structural view of the temperature-controlled heating tube in Fig. 4;

Fig. 6 is a schematic diagram of qualitative analysis of hot water energy dissipation in the present invention;

Fig. 7 is a schematic diagram of the qualitative analysis of energy consumed by the water pump of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 3 , as shown in FIG. 3 , a user-side distributed storage hot water supply system of the present invention includes a main water tank 20 with a heat source 10 , a water supply pipeline 40 provided with a hot water pump 30 , and user-side water equipment 50 And the circulating water supply system formed by the circulating pipe 60, the user-side water equipment 50 is equipped with a back pressure variable capacity hot water tank 70, and the back pressure variable capacity hot water tank 70 is communicated with the water supply pipeline 40 through the water supply branch pipe 41; There is a water replenishment pipe 90, and a check valve 80 is arranged on the water replenishment pipe 90; the back pressure variable capacity hot water tank 70 of each user-side water device 50 is equipped with a water replenishment limit switch 75, and each water replenishment limit switch 75 passes through the water replenishment limit The signal line 100 is connected in series to the hot water pump 30;

If the water replenishment limit switch 75 of the back pressure variable capacity hot water tank 70 on the loop is connected in series, any one of the user side back pressure variable capacity hot water tanks 70 with water replenishment limit switch 75 (see Figure 4) will start the heating The water pump 30 runs into the water replenishment process of the user-side back pressure variable capacity hot water tank 70 . At this moment, there will be a pressure difference between the water supply pipe 40 and the circulation pipe 60. Under the action of the water supply pressure, the cold water stored in the water supply pipe network (including the water supply pipe 40 and the water supply branch pipe 41) is first pressed back to the circulation pipe 60 and the main water tank 20. . When the cold water in the water supply pipe network is emptied, the pipe network is filled with hot water, and the temperature-controlled three-way valve of the back pressure variable capacity hot water tank 70 is switched to the water supply state, and the hot water passes through the pipe network to the back pressure variable on each user side. Capacity hot water tank 70 replenishes water until hot water is full of. After filling the water, the flow of hot water in the water supply pipe network drops to zero, and the pressure of the water supply pipe 40 will further increase to send a pump stop signal to control the hot water pump 30 to stop running automatically.

When the user-side water equipment 50 uses hot water, the hot water in the hot water cavity 71 of the back pressure variable capacity hot water tank 70 flows out, and the volume of the hot water cavity 71 of the back pressure variable capacity hot water tank 70 gradually decreases under the action of back pressure. When the hot water cavity 71 of any back pressure variable capacity hot water tank 70 is reduced to the set volume, the replenishment limit switch 75 sends a replenishment signal to enter the above replenishment process until all user side water tanks 70 are full.

Referring to Fig. 4, the back pressure variable volume hot water tank 70 includes an insulated box body, and the box body is divided into a hot water chamber 71 and a back pressure chamber 72 by an adiabatic partition 73, and the top of the hot water chamber 71 is provided with a replenishment limit A switch 75, one side of the hot water chamber 71 is provided with a hot water outlet pipe 78 communicating with the water equipment 50 on the user side, and the other side is provided with a water inlet pipe 77, and the water inlet pipe 77 is connected with the water supply branch pipe 41 through a temperature-controlled three-way valve 79; The back pressure chamber 72 communicates with the circulation pipe 60 through a pressure balance pipe 710, and the pressure balance pipe 710 is connected to the temperature control three-way valve 79 through a bypass pipe 711;

When the water replenishment limit switch 75 sends out a signal, the system hot water pump 30 starts, and the pressure of the water supply pipe 40 rises. At this time, due to the low water temperature, the temperature-controlled three-way valve 79 is connected to the port connected to the water supply branch pipe 41 and the bypass pipe 711. , the cold water in the water supply pipe network flows into the circulation pipe 60 through the bypass pipe 711 and the pressure balance pipe 710 . After the cold water is emptied, the water temperature rises, and the temperature control three-way valve 79 acts to close the bypass, the water supply branch pipe 41 is connected with the water inlet pipe 77, and the hot water flows into the hot water chamber 71 to be full. During the water filling process, the thermal insulation breaker 73 gradually moves down to the bottom under the push of the pressure difference between the upper and lower ends, and the water replenishment ends. After replenishing water, the hot water flow rate in the water supply pipe 40 drops to zero, the hot water pump 30 is in an idling state, the motor current drops, a pump stop signal is generated, and the hot water pump stops.

Referring to Fig. 5, the hot water outlet 78 is connected to a temperature-controlled heating pipe 76, the temperature-controlled heating pipe 76 includes an adiabatic casing 761, and one side of the adiabatic casing 761 is provided with a water outlet 765 communicating with the hot water outlet pipe 78, and the adiabatic casing The other side of 761 is provided with a water inlet 764, and a temperature-controlled heating element 762 and a temperature-measuring element 763 are arranged in the heat-insulating shell.

When the temperature of the hot water is normal, the tubular temperature-controlled heating element 762 is in a power-off state. When the hot water in the tank is not used for a long time and the temperature of the hot water in the tank is lower than the minimum set temperature, the water flow flowing through the tubular temperature-controlled heating element 762 from the water inlet 764 will cool the temperature-measuring element 763 so that the tubular temperature-controlled heating element The 762 circuit is turned on, and the water flow is heated; if there is no need to use hot water, the water in the pipe does not flow, and the hot water at the temperature measuring element 763 will quickly heat up to the upper limit of the set temperature, and a power-off signal will be sent. The tubular temperature-controlled heating element 762 only works when the water temperature is too low and there is water flowing in the temperature-controlled heating pipe 76 .

The invention realizes a novel energy-saving water-saving hot water supply system. Compared with the prior art, the present invention distributes part of the hot water nearby and stores it in the water equipment 50 on the user side, which greatly reduces the hot water circulation time of the circulation pipe network, reduces the heat consumption of the circulation pipe network and the water pump in the process of hot water transmission and distribution. power consumption. The qualitative analysis of the energy consumption of the present invention and technical solution one is as follows: for technical solution one, since hot water must circulate continuously in the circulation pipe network during use, the pipe network is always in a state of heat dissipation, and the power consumption of its hot water pump 30 and The heat consumption flow of the pipe network can be regarded as a constant. The heat consumption flow of the pipe network is represented by the curve A in Fig. 6, and the power consumption of the hot water pump is represented by the curve C in Fig. 7; After the end, the hot water in the circulation pipe network no longer flows, and the water temperature gradually drops to the ambient temperature. In addition, because the circulation pipe 60 has no heat consumption, the heat consumption flow of the pipe network is roughly half of that of the technical solution during the water replenishment period. The water temperature drop in the tube gradually decreases to zero. Therefore, the heat consumption flow of the pipe network is represented by the curve B in Figure 6, and the power consumption of the circulating water pump is represented by the pulse curve D in Figure 7. Therefore, it can be seen that compared with the technical solution 1, the present invention has significant advantages in reducing the energy consumption of the pipe network and the power consumption of the water pump.

The description of the above examples is only used to help understand the core ideas of the present invention; meanwhile, for those of ordinary skill in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application ranges. , the contents of this specification should not be construed as limiting the present invention.

Claims (3)

1. A user-side distributed storage hot water supply system, comprising a main water tank with a heat source, a water supply pipeline provided with a hot water pump, a user-side water equipment and a circulating water supply system formed by a circulation pipe, characterized in that the The water equipment on the user side is equipped with a back pressure variable capacity hot water tank, and the back pressure variable capacity hot water tank is connected with the water supply pipe through the water supply branch pipe; the circulation pipe is connected with a water supply pipe, and a check valve is installed on the water supply pipe; each user side The back pressure variable capacity hot water tanks of the water equipment are all equipped with water supply limit switches, and each water supply limit switch is connected in series to the hot water pump through the water supply limit signal line; wherein, The back pressure variable capacity hot water tank consists of a thermal insulation box, which is divided into a hot water chamber and a back pressure chamber by an adiabatic partition. The hot water outlet pipe is connected to the water equipment on the user side, and the other side is provided with a water inlet pipe. The water inlet pipe is connected to the water supply branch pipe through a temperature-controlled three-way valve; the back pressure chamber is connected to the circulation pipe through a pressure balance pipe, and the pressure balance pipe passes through the side The through pipe is connected to the temperature-controlled three-way valve; After the water supply limit switch of any user-side back pressure variable capacity hot water tank sends out a signal, the system hot water pump starts, the pressure of the water supply pipe rises, and the temperature control three-way valve is connected to the port connected to the water supply branch pipe and the bypass pipe. The cold water in the water supply pipe flows into the circulation pipe through the bypass pipe and the pressure balance pipe; after the cold water is emptied, the water temperature rises, the temperature control three-way valve acts to close the bypass pipe, the water supply branch pipe is connected to the water inlet pipe, and the hot water flows in The hot water chamber is full; the heat insulation is broken during the water filling process; driven by the pressure difference between the upper and lower ends, it gradually moves down to the bottom, and the water replenishment is completed; after the water replenishment is completed, the flow of hot water in the water supply pipe drops to zero, and the hot water pump In the idling state, the motor current drops, a signal to stop the pump is generated, and the heat supply pump stops. 2. A user-side distributed storage hot water supply system according to claim 1, characterized in that the hot water outlet pipe is connected to a temperature-controlled heating pipe, and the temperature-controlled heating pipe includes a heat-insulating shell, and the heat-insulating One side of the casing is provided with a water outlet to communicate with the hot water outlet pipe, and the other side of the adiabatic casing is provided with a water inlet. The adiabatic casing is equipped with a temperature-controlled heating element and a temperature-measuring element; when the hot water temperature is normal, the tubular temperature-controlled heating The element is in a power-off state, and when the temperature of the hot water in the back pressure variable capacity hot water tank is lower than the minimum set temperature, the water flowing through the tubular temperature-controlled heating element from the water inlet will cool the temperature-measuring element and make the tubular temperature-controlled heating element The circuit conducts and the water flow is heated. 3 . The user-side distributed storage hot water supply system according to claim 1 , wherein an upper limit positioning ring is also provided in the hot water chamber. 4 .