CN217685253U - Large-temperature-difference transmission and distribution heating system based on heat pump - Google Patents

Abstract

The utility model belongs to the technical field of the heat supply technique and specifically relates to big difference in temperature distribution heating system based on heat pump, including one-level heat supply unit, second grade heat supply unit, one-level heat supply unit with realize the heat transfer through heating power heat transfer station between the second grade heat supply unit, the end-to-end connection user side of second grade heat supply unit, the one-level water supply line of one-level heat supply unit with install a big difference in temperature distribution unit between the return water pipeline of the second grade heat supply unit of user side, big difference in temperature distribution unit is used for realizing heat pump formula return water mixed flow distribution. The system adopts a secondary heating system, and simultaneously can directly call partial water flow of primary water supply and secondary water return to realize water mixing at the front end of secondary water supply, so that the water supply temperature and effect can be properly improved effectively according to the requirement, and meanwhile, the phenomenon of hydraulic imbalance can be effectively inhibited, and the heating effect is improved.

Description

Large-temperature-difference transmission and distribution heating system based on heat pump

Technical Field

The utility model belongs to the technical field of the heat supply technique and specifically relates to big difference in temperature distribution heating system based on heat pump.

Background

In winter heating in northern China, a water plate exchange type heat supply unit with small temperature difference and large flow is basically adopted. In addition, the central heating system in northern areas of China mainly adopts large and medium central heating and assists other small and distributed heating.

The heat source of the large and medium central heating system is generally a large heating boiler room or a thermal power plant, and the pipe network also generally adopts a primary pipe network form and a secondary pipe network form. At present, few direct heating methods of small heating systems exist, in which hot water at 60-70 ℃ of a heat source is directly delivered to the home of a user through a pipeline, and the return water temperature after heat exchange is generally about 40-50 ℃. There are some centralized and distributed combined heating systems, for example, in patent document No. cn202020992548.X, a centralized and distributed combined heating system is disclosed, which mainly includes a first-stage heat exchange station (a), and a plurality of centralized second-stage heat exchange stations arranged in parallel at the downstream of the first-stage heat exchange station (a), where the first-stage heat exchange station (a) includes a first-stage absorption heat pump (1), and the heat source side of the first-stage absorption heat pump (1) is connected to the thermal power plant through a first-stage water supply main pipe (2) and a first-stage water return main pipe (3), and is characterized in that: the system also comprises a plurality of distributed secondary heat exchange stations which are arranged in parallel; a second-stage absorption heat pump is arranged in the distributed second-stage heat exchange station, a heat source side inlet of the second-stage absorption heat pump is communicated with a first-stage water supply main pipe (2) through a distributed water supply branch pipe, a heat source side outlet of the second-stage absorption heat pump is communicated with a first-stage water return main pipe (3) through a distributed water return branch pipe, and a cold source side of the second-stage absorption heat pump is connected with a new user water supply pipe and a new user water return pipe of a new heat user; a primary net pressure pump (4) is arranged on the primary water return main pipe (3), a relay pump (36) is arranged on the distributed water return branch pipe, and a new household circulating water pump (37) is arranged on the new household water return pipe; and the primary water supply main pipe (2) positioned at the upstream of the distributed secondary heat exchange station is also provided with an electric flow regulating valve.

It can be seen from the above patent that although it improves the integration of centralized and distributed heating, it still adopts the relatively traditional non-adjustable heating mode with small temperature difference of the secondary network.

Therefore, at present, both large and medium central heating systems, small and distributed heating systems, and small and direct heating systems are small temperature difference conveying systems in terms of heating, and the consumption of conveying pipelines and the power consumption of water pumps in the whole system are large when the small temperature difference large flow conveying system is adopted.

Therefore, the utility model discloses to the problem that exists among the current central heating system, provided a big difference in temperature distribution heating system based on heat pump for compromise the influence of water conservancy imbalance when improving the heat supply difference in temperature, solve the problem that exists among the prior art better.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve one of above-mentioned technical problem, the technical scheme who adopts is: big difference in temperature distribution heating system based on heat pump, including one-level heat supply unit, second grade heat supply unit, one-level heat supply unit with realize the heat transfer through heating power heat exchange station between the second grade heat supply unit, the end-to-end connection user side of second grade heat supply unit, the one-level water supply line of one-level heat supply unit with install a big difference in temperature distribution unit between the return water pipeline of the second grade heat supply unit of user side, big difference in temperature distribution unit is used for realizing heat pump formula return water mixed flow distribution.

In any of the above schemes, preferably, the primary heat supply unit includes a primary water supply line and a primary water return line, and the distal ends of the primary water supply line and the primary water return line are both connected to the heat exchange station and are matched with the secondary heat supply unit via the heat exchange station.

In any of the above schemes, preferably, the secondary heat supply unit includes a secondary water supply line and a secondary water return line led out from the heat exchange station, and the tail ends of the secondary water supply line and the secondary water return line are both connected to the user side.

In any of the above embodiments, preferably, water temperature display instruments are installed on both the secondary water supply line and the secondary water return line.

Preferably in any of the above schemes, big difference in temperature transmission and distribution unit includes a big difference in temperature pipeline, big difference in temperature pipeline's the end of intaking is connected the one-level water supply line, a parallel connection formula is muddy water accent and flows the pressure regulating subassembly to the play water end of big difference in temperature pipeline's installation, the parallel connection formula is muddy water accent and flows the pressure regulating subassembly and be used for sneaking into the second grade water supply once more behind first grade high temperature water and the second grade low temperature return mixed flow high temperature regulation valve of intaking, high temperature play water regulation valve are installed respectively to big difference in temperature pipeline's entrance point and exit end.

In any of the above schemes, preferably, a high temperature water supply power pump is installed on the large temperature difference conveying pipeline.

In any of the above schemes, preferably, the parallel type water mixing flow-regulating and pressure-regulating assembly includes two water mixing base stations arranged in parallel, two ends of the two water mixing base stations are respectively connected with a base station water inlet pipe and a base station water supply pipe, the two base station water inlet pipes are connected through a water inlet multi-way, the two base station water supply pipes are connected through a water supply multi-way, and a branch control valve is installed on each of the base station water inlet pipes and the base station water supply pipes; the water outlet end of the large-temperature-difference conveying pipeline is connected with the corresponding water inlet multi-way, the water inlet multi-way is further connected with a return water mixing pipe, the other end of the return water mixing pipe is connected to the second-stage return water pipeline, the tail end of the water supply multi-way is connected with a mixing water supply pipe, the tail end of the mixing water supply pipe is connected to the second-stage water supply pipeline, and a mixing water supply flow control valve is installed on the mixing water supply pipe.

In any of the above schemes, preferably, a secondary return water flow control valve is installed on the return water mixing pipe, and a return water mixing pump is further installed on the secondary return water line.

In any of the above embodiments, preferably, a feed water heat pump is further installed in the mixing water supply pipe.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the system adopts a secondary heating system, and simultaneously can directly call partial water flow of primary water supply and secondary water return to realize water mixing at the front end of the secondary water supply, so that the water supply temperature and effect can be effectively and properly improved according to the requirement, meanwhile, the phenomenon of hydraulic imbalance can be effectively inhibited, and the heating effect is improved.

2. The parallel type water mixing, flow regulating and pressure regulating assembly designed in the system directly utilizes the water mixing base station to mix cold water and hot water, realizes the mixing of cold water and hot water in different proportions by controlling the opening degree of each mixed valve opening, and supplies secondary water after different mixed heat temperatures are reached, thereby realizing the purpose of improving the temperature of the supplied water in different degrees and further improving the water supply effect.

3. The parallel water mixing and flow regulating assembly is installed at the downstream end of the secondary backwater in the system, so that the secondary backflow water supply can be effectively realized after the short-range mixed flow of part of the secondary water is effectively realized, the water supply efficiency and effect are effectively improved, meanwhile, the water mixing temperature can be regulated and controlled according to the heat mixing requirements under different working conditions, and the temperature difference amplitude control of the temperature when the secondary water supply enters a user is effectively guaranteed.

4. The parallel type water mixing flow-regulating pressure-regulating assembly adopts two water mixing base stations which are arranged in parallel, the water mixing base stations which are arranged in parallel can be directly closed for maintenance after one of the base stations breaks down, the regulation of the integral heat supply water mixing temperature is not influenced during maintenance, and the maintenance of the water mixing base stations is effectively ensured to be finished under the condition of no shutdown; the two can run simultaneously or be mutually standby.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below. Throughout the drawings, like elements or components are generally identified by like reference numerals. In the drawings, elements or components are not necessarily drawn to scale.

Fig. 1 is a schematic diagram of the circuit connection of the present invention.

Fig. 2 is a schematic structural view of the parallel type water mixing flow-regulating pressure-regulating assembly of the present invention.

In the figure, 1, a heat exchange station; 2. a user side; 3. a primary water supply line; 4. a primary water return pipeline; 5. a secondary water supply line; 6. a secondary water return pipeline; 7. a water temperature display instrument; 8. a large temperature difference conveying pipeline; 9. a high temperature water inlet regulating valve; 10. a high temperature water outlet regulating valve; 11. a high temperature water supply power pump; 12. a water mixing base station; 13. a base station water inlet pipe; 14. a base station water supply pipe; 15. a branch control valve; 16. a return water mixing pipe; 17. mixing into a water supply pipe; 18. mixing the water into a water supply flow control valve; 19. a secondary water return flow control valve; 20. backwater mixing pump; 21. a water supply heat pump.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. The specific structure of the utility model is shown in the figure 1-2.

Example 1:

big difference in temperature distribution heating system based on heat pump, including one-level heat supply unit, second grade heat supply unit, one-level heat supply unit with realize the heat transfer through heating power heat exchange station 1 between the second grade heat supply unit, the end-to-end connection user side 2 of second grade heat supply unit, one-level water supply line 3 of one-level heat supply unit with install a big difference in temperature distribution unit between the return water pipeline of user side 2's second grade heat supply unit, big difference in temperature distribution unit is used for realizing heat pump formula return water mixed flow distribution.

The large-temperature-difference transmission and distribution heating system based on the heat pump is provided with the large-temperature-difference transmission and distribution unit at the secondary water return end, so that the primary water supply and the secondary water return can be effectively mixed and then merged into the secondary water supply, the temperature of the secondary water supply can be effectively increased within a certain range, and meanwhile, the temperature can be effectively adjusted according to the temperature display of the heat supply inlet water and the heat supply return water, so that the control of the whole heat supply inlet water is effectively ensured, and the heat supply effect is effectively adjusted.

In any of the above schemes, preferably, the large temperature difference transmission and distribution unit includes a large temperature difference conveying pipeline 8, the water inlet end of the large temperature difference conveying pipeline 8 is connected to the first-stage water supply pipeline 3, the water outlet end of the large temperature difference conveying pipeline 8 is provided with a parallel-connection type water mixing flow regulating and pressure regulating assembly, the parallel-connection type water mixing flow regulating and pressure regulating assembly is used for mixing the first-stage high-temperature water and the second-stage low-temperature return water into the second-stage water supply again after mixing, and the inlet end and the outlet end of the large temperature difference conveying pipeline 8 are respectively provided with a high-temperature water inlet regulating and controlling valve 9 and a high-temperature water outlet regulating and controlling valve 10.

The high-temperature-difference conveying pipeline 8 directly conveys part of the high-temperature hot water supplied with the water to the parallel water mixing and flow regulating assembly, and conveys the high-temperature water with less flow to the parallel water mixing and flow regulating assembly, so that the high-temperature water and the low-temperature secondary return water with larger flow can be mixed and then the temperature of the mixed water is increased to the temperature capable of supplying the water or higher than the temperature for supplying the water, and therefore the heat supply effect after mixed flow water supply can be effectively guaranteed.

In any of the above solutions, it is preferable that a high temperature water supply power pump 11 is installed on the large temperature difference delivery pipeline 8.

The high-temperature water supply power pump 11 can control the pressure and flow of high-temperature water supply, and the high-temperature water supply power pump 11 arranged here can be used for conveying high-temperature water in a small-flow conveying mode, so that the loss of the high-temperature water supply power pump can be effectively reduced, and the service life of the high-temperature water supply power pump is prolonged.

In any of the above schemes, preferably, the parallel water mixing and flow regulating assembly includes two water mixing base stations 12 arranged in parallel, two ends of each of the two water mixing base stations 12 are respectively connected to a base station water inlet pipe 13 and a base station water supply pipe 14, the two base station water inlet pipes 13 are connected through a water inlet multi-way, the two base station water supply pipes 14 are connected through a water supply multi-way, and a branch control valve 15 is installed on each of the base station water inlet pipes 13 and the base station water supply pipes 14; the water outlet end of the large-temperature-difference conveying pipeline 8 is connected with the corresponding water inlet multi-way, the water inlet multi-way is further connected with a return water mixing pipe 16, the other end of the return water mixing pipe 16 is connected to the second-stage return water pipeline 6, the tail end of the water supply multi-way is connected with a mixing water supply pipe 17, the tail end of the mixing water supply pipe 17 is connected to the second-stage water supply pipeline 5, and a mixing water supply flow control valve 18 is installed on the mixing water supply pipe 17.

Two muddy water basic station 12 that parallel muddy water accent class pressure regulating subassembly adopted parallel setting work simultaneously or not, can improve muddy water ability effectively when simultaneous working, can make other muddy water basic station 12 regard as reserve structure when only muddy water basic station 12 during operation, muddy water basic station 12 when in the use is in when damaging, then need quick opening another as reserve muddy water basic station 12, thereby can close the muddy water basic station 12 of damage and in time maintain, whole muddy water work can be normal clear under the effect of another muddy water basic station 12 when the maintenance simultaneously, guarantee whole heating system's normal operating with this.

In any of the above embodiments, it is preferable that a feed water heat pump 21 is further installed on the mixing water supply pipe 17.

The water supply heat pump 21 can effectively send the mixed water to the secondary water return line 6 according to the requirement and directly perform heat supply to the user end 2 after mixing.

Example 2:

big difference in temperature distribution heating system based on heat pump, including one-level heat supply unit, second grade heat supply unit, one-level heat supply unit with realize the heat transfer through heating power heat exchange station 1 between the second grade heat supply unit, the end-to-end connection user side 2 of second grade heat supply unit, one-level water supply line 3 of one-level heat supply unit with install a big difference in temperature distribution unit between the return water pipeline of user side 2's second grade heat supply unit, big difference in temperature distribution unit is used for realizing heat pump formula return water mixed flow distribution.

According to the large-temperature-difference transmission and distribution heating system based on the heat pump, the large-temperature-difference transmission and distribution unit is arranged at the secondary water return end, so that the primary water supply and the secondary water return can be effectively mixed and then merged into the secondary water supply, the temperature of the secondary water supply is effectively increased within a certain range, and meanwhile, the temperature can be effectively adjusted according to the temperature display of the heat supply inlet water and the heat return water, so that the control of the integral heat supply inlet water is effectively ensured, and the heat supply effect is effectively adjusted.

In any of the above schemes, preferably, the primary heat supply unit includes a primary water supply line 3 and a primary water return line 4, and distal ends of the primary water supply line 3 and the primary water return line 4 are both connected to the heat exchange station 1 and are matched with the secondary heat supply unit via the heat exchange station 1.

In any of the above schemes, preferably, the secondary heat supply unit includes a secondary water supply pipeline 5 and a secondary water return pipeline 6 led out from the heat exchange station 1, and the ends of the secondary water supply pipeline 5 and the secondary water return pipeline 6 are both connected to the user terminal 2.

In any of the above schemes, preferably, water temperature display instruments 7 are installed on the secondary water supply pipeline 5 and the secondary water return pipeline 6.

The water temperature display instrument 7 can effectively detect the current water temperature of the corresponding pipeline and effectively control the water inlet temperature and the water outlet temperature of the user end 2.

It is preferred in any one of the above-mentioned schemes, big difference in temperature transmission and distribution unit includes a big difference in temperature pipeline 8, the end of intaking of big difference in temperature pipeline 8 is connected one-level water supply line 3, a parallel connection formula mixes water accent class pressure regulating subassembly is installed to big difference in temperature pipeline 8's play water end, the parallel connection type mixes water accent class pressure regulating subassembly and is used for mixing into the second grade water supply again behind first grade high-temperature water and the mixed flow of second grade low temperature return water the high temperature regulation valve 9 of intaking, high temperature play water regulation valve 10 are installed respectively to big difference in temperature pipeline 8's entrance point and exit end.

The high-temperature-difference conveying pipeline 8 directly conveys the high-temperature hot water supplied with water partially to the parallel water mixing and flow regulating assembly, and conveys the high-temperature water with less flow to the parallel water mixing and flow regulating assembly, so that the high-temperature water and the low-temperature secondary return water with larger flow can be mixed and then the temperature of the mixed water is increased to the temperature capable of supplying water or higher than the temperature of the supplied water, and the heat supply effect after mixed-flow water supply can be effectively guaranteed.

In any of the above solutions, it is preferable that a high temperature water supply power pump 11 is installed on the large temperature difference delivery pipeline 8.

The high-temperature water supply power pump 11 can control the pressure and flow of high-temperature water supply, and the high-temperature water supply power pump 11 arranged here can be used for conveying high-temperature water in a small-flow conveying mode, so that the loss of the high-temperature water supply power pump can be effectively reduced, and the service life of the high-temperature water supply power pump is prolonged.

In any of the above schemes, preferably, the parallel type water mixing flow-regulating and pressure-regulating assembly includes two water mixing base stations 12 arranged in parallel, two ends of the two water mixing base stations 12 are respectively connected to a base station water inlet pipe 13 and a base station water supply pipe 14, the two base station water inlet pipes 13 are connected through a water inlet multi-way, the two base station water supply pipes 14 are connected through a water supply multi-way, and a branch control valve 15 is installed on each of the base station water inlet pipes 13 and the base station water supply pipes 14; the water outlet end of the large-temperature-difference conveying pipeline 8 is connected with the corresponding water inlet multi-way, a return water mixing pipe 16 is further connected to the water inlet multi-way, the other end of the return water mixing pipe 16 is connected to the secondary return water pipeline 6, the tail end of the water supply multi-way is connected with a mixing water supply pipe 17, the tail end of the mixing water supply pipe 17 is connected to the secondary water supply pipeline 5, and a mixing water supply control valve 18 is installed on the mixing water supply pipe 17.

Two muddy water basic station 12 of parallel muddy water accent current pressure regulating subassembly adoption parallel arrangement work simultaneously or not simultaneously, can improve muddy water ability effectively when simultaneous operation, can make other muddy water basic station 12 regard as standby structure when only muddy water basic station 12 during operation, muddy water basic station 12 when using is in when damaging, then need quick another of opening as reserve muddy water basic station 12, thereby can close the muddy water basic station 12 that damages and in time maintain, whole muddy water work can normally be gone on under another muddy water basic station 12's effect when the maintenance simultaneously, guarantee whole heating system's normal operating with this.

When the parallel type water mixing flow-regulating pressure-regulating assembly works, low-temperature water at the secondary water return end can be mixed into the water mixing base station 12 through the return water mixing pipe 16, and meanwhile, the mixed flow can be controlled through the opening degree of the secondary water return flow control valve 19; in addition, the high-temperature water can be mixed by controlling the high-temperature water supply power pump 11 to work to send primary high-temperature water into the water mixing base station 12, and the sent flow can be controlled by the high-temperature water outlet regulating and controlling valve 10, so that the purpose of reasonably controlling the temperature of the mixed water outlet water is achieved.

The water of high temperature partially after mixing the water temperature regulation can directly incorporate into second grade water supply pipe 5, directly sends into user side 2 with the inside second grade water supply of second grade water supply pipe 5 to can realize the purpose of quick response regulation, mix water governing speed fast, can guarantee better to the big difference in temperature regulation of the temperature of intaking that the second grade supplied water, guarantee effectively that the heat supply under the control of the difference in temperature state can be realized, improve the effect and the regulation and control ability of heat supply.

In any of the above solutions, preferably, a secondary return water flow control valve 19 is installed on the return water mixing pipe 16, and a return water mixing pump 20 is further installed on the secondary return water pipe 6.

The second-stage return water flow control valve 19 can effectively adjust the proportion and the flow rate of low-temperature return water during mixing; the backwater mixing pump 20 can effectively regulate and control low-pressure low-temperature backwater, and the low-pressure low-temperature backwater is pressurized and then sent to the water mixing base station 12.

In any of the above embodiments, it is preferable that a feed water heat pump 21 is further installed on the mixing water supply pipe 17.

The water supply heat pump 21 can effectively send the mixed water to the secondary water return pipeline 6 to be mixed according to requirements and then directly perform heat supply on the user side 2.

The specific working principle is as follows:

this big difference in temperature transmission and distribution heating system based on heat pump can be effectively merge the second grade water supply after realizing mixing with the second grade return water at second grade return water end installation big difference in temperature transmission and distribution unit to this can realize improving the temperature of second grade water supply in certain range effectively and can also realize carrying out the regulation effectively in the temperature according to the temperature demonstration of heat supply advance return water effectively simultaneously, thereby guarantee the control of whole heat supply intake effectively, adjust the heat supply effect effectively, normal water supply behind the headtotail, can realize whole regulation and control through the heat source end when needs regulate and control water supply temperature, also can realize the difference in temperature regulation and control through the work of controlling parallel muddy water flow regulation and control subassembly simultaneously. The high-temperature-difference conveying pipeline 8 directly conveys part of the high-temperature hot water supplied with the water to the parallel water mixing and flow regulating assembly, and conveys the high-temperature water with less flow to the parallel water mixing and flow regulating assembly, so that the high-temperature water and the low-temperature secondary return water with larger flow can be mixed and then the temperature of the mixed water is increased to the temperature capable of supplying the water or higher than the temperature for supplying the water, and therefore the heat supply effect after mixed flow water supply can be effectively guaranteed. Two muddy water basic station 12 of parallel muddy water accent current pressure regulating subassembly adoption parallel arrangement work simultaneously or not simultaneously, can improve muddy water ability effectively when simultaneous operation, can make other muddy water basic station 12 regard as standby structure when only muddy water basic station 12 during operation, muddy water basic station 12 when using is in when damaging, then need quick another of opening as reserve muddy water basic station 12, thereby can close the muddy water basic station 12 that damages and in time maintain, whole muddy water work can normally be gone on under another muddy water basic station 12's effect when the maintenance simultaneously, guarantee whole heating system's normal operating with this. When the parallel type water mixing flow-regulating pressure-regulating component works, low-temperature water at the secondary water return end can be mixed into the water mixing base station 12 through the return water mixing pipe 16, and meanwhile, the mixed flow can be controlled through the opening degree of the secondary return water flow-controlling valve 19; in addition, the high-temperature water can be mixed by controlling the high-temperature water supply power pump 11 to work, so that the first-stage high-temperature water is sent to the water mixing base station 12, and the sent flow can be controlled by the high-temperature water outlet regulation and control valve 10, so that the purpose of reasonably controlling the temperature of the mixed water outlet water is achieved. The water of high temperature partially after mixing the water temperature regulation can directly incorporate into second grade water supply pipe 5, directly sends into user side 2 with the inside second grade water supply of second grade water supply pipe 5 to can realize the purpose of quick response regulation, mix water governing speed fast, can guarantee better to the big difference in temperature regulation of the temperature of intaking that the second grade supplied water, guarantee effectively that the heat supply under the control of the difference in temperature state can be realized, improve the effect and the regulation and control ability of heat supply.

The system adopts a secondary heating system, and simultaneously can directly call partial water flow of primary water supply and secondary water return to realize water mixing at the front end of secondary water supply, so that the water supply temperature and effect can be properly improved effectively according to the requirement, and meanwhile, the phenomenon of hydraulic imbalance can be effectively inhibited, and the heating effect is improved. The mixed flow of cold water, hot water is mixed directly to the muddy water accent class pressure regulating subassembly of parallel that designs in this system utilizes muddy water base station 12 to carry out, realizes the mixing of the cold water of different proportions and hot water through the aperture that each mixed flow valve of control opened to supply the second grade water supply after reaching different muddy hot temperature, improve the purpose that provides the temperature degree with this realization in different degrees, and then improve the water supply effect. The parallel water mixing and flow regulating assembly is installed at the downstream end of the secondary backwater in the system, so that the secondary backflow water supply can be effectively realized after the short-range mixed flow of part of the secondary water is effectively realized, the water supply efficiency and effect are effectively improved, meanwhile, the water mixing temperature can be regulated and controlled according to the heat mixing requirements under different working conditions, and the temperature difference amplitude control of the temperature when the secondary water supply enters a user is effectively guaranteed. The parallel type water mixing flow-regulating pressure-regulating assembly adopts two water mixing base stations 12 which are arranged in parallel, the water mixing base stations 12 which are arranged in parallel can be directly closed for maintenance after one of the base stations breaks down, the regulation of the integral heat supply water mixing temperature is not influenced during maintenance, and the maintenance of the water mixing base stations 12 is effectively guaranteed to be completed under the condition of no shutdown; the two can run simultaneously or be mutually standby.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification; to those skilled in the art, any alternative improvements or changes made to the embodiments of the present invention all fall within the scope of the present invention.

The parts of the present invention not described in detail are the known techniques of those skilled in the art.

Claims (9)

1. Big difference in temperature transmission and distribution heating system based on heat pump, its characterized in that: including one-level heat supply unit, second grade heat supply unit, one-level heat supply unit with realize the heat transfer through heating power heat transfer station between the second grade heat supply unit, the end-to-end connection user side of second grade heat supply unit, the one-level water supply line of one-level heat supply unit with install a big difference in temperature distribution unit between the return water pipeline of the second grade heat supply unit of user side, big difference in temperature distribution unit is used for realizing heat pump formula return water mixed flow distribution.

2. The heat pump based large temperature difference distribution heating system according to claim 1, wherein: the primary heat supply unit comprises a primary water supply pipeline and a primary water return pipeline, the far ends of the primary water supply pipeline and the primary water return pipeline are connected into the heat exchange station, and the far ends of the primary water supply pipeline and the primary water return pipeline are matched with the secondary heat supply unit through the heat exchange station.

3. The heat pump based large temperature difference distribution heating system according to claim 2, wherein: the secondary heat supply unit comprises a secondary water supply pipeline and a secondary water return pipeline which are led out from the heat exchange station, and the tail ends of the secondary water supply pipeline and the secondary water return pipeline are connected with the user side.

4. The heat pump based large temperature difference distribution heating system according to claim 3, wherein: and water temperature display instruments are respectively arranged on the secondary water supply pipeline and the secondary water return pipeline.

5. The heat pump based large temperature difference distribution heating system according to claim 4, wherein: big difference in temperature transmission and distribution unit includes a big difference in temperature pipeline, big difference in temperature pipeline's the end of intaking is connected the one-level water supply line, big difference in temperature pipeline's play water end is installed an associated mode and is mixed water and transfer a class pressure regulating subassembly, the parallel mixes water and transfers a class pressure regulating subassembly and is used for mixing the second grade water supply once more behind first grade high-temperature water and the second grade low temperature return mixed flow the high temperature regulation valve of intaking, high temperature play water regulation valve are installed respectively to big difference in temperature pipeline's entrance point and exit end.

6. The heat pump based large temperature difference distribution heating system according to claim 5, wherein: and a high-temperature water supply power pump is arranged on the large-temperature-difference conveying pipeline.

7. The heat pump based large temperature difference distribution heating system according to claim 6, wherein: the parallel type water mixing flow regulating and pressure regulating assembly comprises two water mixing base stations which are arranged in parallel, two ends of each water mixing base station are respectively connected with a base station water inlet pipe and a base station water supply pipe, the two base station water inlet pipes are connected through a water inlet multi-way, the two base station water supply pipes are connected through a water supply multi-way, and branch control valves are arranged on the base station water inlet pipes and the base station water supply pipes; the water outlet end of the large-temperature-difference conveying pipeline is connected with the corresponding water inlet multi-way, the water inlet multi-way is further connected with a return water mixing pipe, the other end of the return water mixing pipe is connected to the second-stage return water pipeline, the tail end of the water supply multi-way is connected with a mixing water supply pipe, the tail end of the mixing water supply pipe is connected to the second-stage water supply pipeline, and a mixing water supply flow control valve is installed on the mixing water supply pipe.

8. The heat pump-based large temperature difference transmission, distribution and heating system according to claim 7, wherein: and a secondary backwater flow control valve is arranged on the backwater mixing pipe, and a backwater mixing pump is also arranged on the secondary backwater pipeline.

9. The heat pump based large temperature difference distribution heating system according to claim 8, wherein: and a water supply heat pump is also arranged on the mixed water supply pipe.

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