CN214841147U - Heating system and geothermal energy source station - Google Patents

Abstract

The utility model relates to a heating equipment technical field especially relates to a heating system and geothermal energy source station. The heat supply system comprises a geothermal well, a heat exchanger, a water supply end, a water return end, a recharging well and a heat pump assembly; a first medium channel and a second medium channel are arranged in the heat exchanger, a first medium in the first medium channel and a second medium in the second medium channel can exchange heat, an inlet of the first medium channel is communicated with the geothermal well, and an inlet of the second medium channel is communicated with the water return end; the heat pump component comprises an evaporator and a condenser, and heat exchange is carried out between the evaporator and the condenser through a third medium; the outlet of the first medium channel can be selectively communicated with the recharging well or the inlet of the evaporator, and the outlet of the second medium channel can be selectively communicated with the water supply end or the inlet of the condenser. The heating system can meet the requirements on heat in different heating periods by switching heating modes.

Description

Heating system and geothermal energy source station

Technical Field

The utility model relates to a heating equipment technical field especially relates to a heating system and geothermal energy source station.

Background

At present, clean energy such as geothermal energy and the like gradually replace traditional coal energy and become important supplements for clean heat supply in various places. In the existing heating system adopting geothermal energy, the heating temperature is not adjustable, the problem of supply more than demand exists in the initial stage and the final stage of heating, the problem of supply less than demand exists in the cold stage of heating, and different requirements in different heating periods cannot be met.

In addition, the geothermal energy source station mostly adopts the working mode of 'independent design-scattered purchase-respective installation-in-station debugging-independent operation', the independent design makes the equipment selection changeable and complicated, sometimes needs to customize equipment specially, causes the design, purchase, installation, debugging working cycle long, the expense is high, leads to the construction cycle long of energy station, and the construction cost is high.

Therefore, a heating system and a geothermal energy source station are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heating system can solve the problem that "the confession is greater than the demand" and "the confession meets the demand" that geothermal heating temperature can not be adjusted and lead to.

To achieve the purpose, the utility model adopts the following technical proposal:

a heating system comprises a geothermal well, a heat exchanger, a water supply end, a water return end, a recharging well and a heat pump assembly;

a first medium channel and a second medium channel are arranged in the heat exchanger, a first medium in the first medium channel and a second medium in the second medium channel can exchange heat, an inlet of the first medium channel is communicated with the geothermal well, and an inlet of the second medium channel is communicated with the water return end;

the heat pump component comprises an evaporator and a condenser, and heat exchange is carried out between the evaporator and the condenser through a third medium;

the outlet of the first medium channel can be selectively communicated with the recharging well or the inlet of the evaporator, and the outlet of the second medium channel can be selectively communicated with the water supply end or the inlet of the condenser.

Wherein the heating system is switchable between a first heating mode and a second heating mode;

when the heat supply system is in the first heat supply mode, the outlet of the first medium channel is communicated with the recharge well, and the outlet of the second medium channel is communicated with the water supply end;

when the heating system is in the second heating mode, the outlet of the first medium channel is communicated with the inlet of the evaporator, the outlet of the evaporator is communicated with the recharging well, the outlet of the second medium channel is communicated with the inlet of the condenser, and the outlet of the condenser is communicated with the water supply end.

Wherein the heating system further comprises a first valve assembly and a second valve assembly, the first valve assembly comprises a first port, a second port and a third port, the first port is connected with the outlet of the second medium channel, the second port is connected with the water supply end, the third port is connected with the inlet of the condenser, and the first port can be selectively communicated with the second port or the third port; the second valve assembly includes a fourth port connected to the outlet of the first media passage, a fifth port connected to the recharge well, and a sixth port connected to the inlet of the evaporator, the fourth port being selectively communicable with either the fifth port or the sixth port.

Wherein the first valve assembly comprises: the first switch valve is connected with the outlet of the second medium channel and the water supply end;

and a second switching valve connecting an outlet of the second medium passage and an inlet of the condenser.

Wherein the second valve assembly comprises a three-way valve having three ports, which are the fourth port, the fifth port and the sixth port, respectively.

The heating system further comprises a water supplementing assembly, the water supplementing assembly comprises a water tank and a water supplementing pump, and the water supplementing pump is used for pumping water in the water tank to the water return end.

Wherein, the inlet end of the recharging well is provided with a filtering component;

the filter assembly comprises at least two stages of filters, and the filtering grades of the at least two stages of filters are increased step by step along the recharging direction.

Another object of the utility model is to provide a geothermal energy source station can solve current energy station construction cycle length and problem with high costs.

To achieve the purpose, the utility model adopts the following technical proposal: the utility model has the advantages that:

a geothermal energy source station, comprising:

a container;

in the above heating system, at least part of the heating system is disposed in the container.

The container is provided with a water supply interface, a water return interface, a geothermal interface, a recharge interface, a condenser inlet interface, a condenser outlet interface, an evaporator inlet interface and an evaporator outlet interface;

the heat exchanger is arranged in the container, the inlet of the first medium channel is communicated with the geothermal well through the geothermal interface, the inlet of the second medium channel is communicated with the water return end through the water return interface, the recharge interface is communicated with the recharge well, and the water supply interface is communicated with the water supply end;

the heat pump assembly is arranged outside the container, an inlet of the evaporator is communicated with the inlet interface of the evaporator, an outlet of the evaporator is communicated with the outlet interface of the evaporator, an inlet of the condenser is communicated with the inlet interface of the condenser, and an outlet of the condenser is communicated with the outlet interface of the condenser;

the outlet of the first medium channel can be selectively communicated with the recharging interface or the evaporator inlet interface, and the outlet of the second medium channel can be selectively communicated with the water supply interface or the condenser inlet interface.

The container is provided with a water supply interface, a water return interface, a geothermal interface and a recharge interface;

the heat supply system is arranged in the container, the inlet of the first medium channel is communicated with the geothermal interface, and the water supply interface can be selectively communicated with the outlet of the first medium channel or the outlet of the evaporator;

the inlet of the second medium channel is communicated with the water return interface, and the water supply interface can be selectively communicated with the outlet of the second medium channel or the outlet of the condenser.

Has the advantages that:

the heating system in the utility model has two heating modes, when the outlet of the first medium channel is communicated with the recharging well and the outlet of the second medium channel is communicated with the water supply end, the water is only used for heat exchange in the heat exchanger, the heating temperature is relatively low, the heating system can be used in the early stage and the later stage of heating, and the problem of over supply is avoided; when the outlet of the first medium channel is communicated with the inlet of the evaporator and the outlet of the second medium channel is communicated with the inlet of the condenser, the heat exchanger and the heat pump are connected in series to supply heat, water is used for exchanging heat in the heat exchanger and the heat pump assembly in sequence, the final water supply temperature can be increased, the use requirement in the cold period of heating can be met, and the problem of insufficient supply is avoided. This heating system uses through the switching of two kinds of heating modes, can satisfy different heating periods to thermal demand, uses more in a flexible way.

The utility model provides a geothermal energy source station can realize the modularization and the standardization of geothermal energy source station through with the structure integration in the container for geothermal energy source station can carry out modularization pre-installation and quantization production at the producer, does not need on-the-spot equipment and debugging, greatly reduced geothermal energy source station's construction cost, shortened construction cycle.

Drawings

Fig. 1 is a schematic structural diagram of a heating system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a geothermal energy source station provided in the second embodiment of the present invention.

In the figure:

100. a geothermal energy source station; 200. a geothermal well; 300. recharging the well;

101. a container; 1011. a water supply interface; 1012. a water return interface; 1013. a geothermal interface; 1014. a recharge interface; 1015. a water replenishing interface; 1016. a condenser outlet port; 1017. a condenser inlet interface; 1018. an evaporator outlet interface; 1019. an evaporator inlet interface;

111. a first water supply side pipe; 112. a second water supply side pipe; 113. a third water supply side pipe;

121. a first heat-source-side pipe; 122. a second heat-source-side pipe; 123. a third heat-source-side pipe; 124. a fourth heat-source-side conduit;

1. a heat exchanger; 2. a heat pump assembly; 21. an evaporator; 22. a condenser; 31. a three-way valve; 32. a first on-off valve; 33. a second on-off valve; 34. a third on-off valve; 35. a fourth switching valve; 41. a first desander; 42. a first sand discharge valve; 5. a water replenishing assembly; 51. a third pump; 52. a second desander; 53. a water tank; 54. a water replenishing pump; 61. a deep well pump; 62. a first pump; 63. a second pump; 64. a back-filling pump; 7. a dirt separator; 81. a cartridge filter; 82. a filter bag filter; 9. an exhaust tank.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

As shown in fig. 1, the present embodiment provides a heating system, which is used in cooperation with a geothermal well 200 and a recharging well 300 to supply heat by using geothermal energy. The heating system comprises a heat exchanger 1 and a heat pump assembly 2. The heat exchanger 1 and the heat pump module 2 are connected to form a heat source side passage and a water supply side passage, and the water supply side passage can exchange heat with the heat source side passage to absorb geothermal energy to supply hot water to a user. In the present embodiment, the heat exchanger 1 and the heat pump module 2 are connected by a plurality of pipes to form a heat source-side passage and a water supply-side passage. In other embodiments, the heat exchanger 1 and the heat pump module 2 may be connected in other ways and form a heat source-side passage and a water supply-side passage.

Specifically, the inlet of the heat source side passage communicates with the geothermal well 200, and the outlet of the heat source side passage communicates with the recharge well 300, to use the geothermal well water as the heat source of the heating system. The inlet of the water supply side passage is communicated with the water return end, the outlet of the water supply side passage is communicated with the water supply end, heat exchange is carried out between the water supply side passage and the heat source side passage, cold water at the water return end is heated, and heated hot water is supplied to a user through the water supply end. The heating system can be switched between a first heating mode and a second heating mode, wherein in the first heating mode, the heat exchanger 1 works independently, and the final water supply temperature provided by the heating system is lower; in the second heat supply mode, the heat exchanger 1 is connected with the heat pump assembly 2 in series, and the final water supply temperature provided by the heat supply system is higher.

A first medium channel and a second medium channel are arranged in the heat exchanger 1, and a first medium in the first medium channel and a second medium in the second medium channel can exchange heat. The first medium channel is a part of a heat source side passage, the second medium channel is a part of a water supply side passage, the first medium is geothermal well water, and the second medium is user-side backwater. The heat pump assembly 2 comprises an evaporator 21 and a condenser 22 in heat exchange engagement, the evaporator 21 and the condenser 22 exchanging heat via a third medium. The channel in the evaporator 21 may be a part of the heat source side passage, and the channel in the condenser 22 may be a part of the water supply side passage.

In this embodiment, the inlet of the first medium passage communicates with the geothermal well 200, and the outlet of the first medium passage can selectively communicate with the inlet of the recharge well 300 or the evaporator 21. The inlet of the second medium passage communicates with the water return end, and the outlet of the second medium passage can selectively communicate with the water supply end or the inlet of the condenser 22. By switching the communication positions of the outlets of the first medium channel and the second medium channel, the heating system can be switched between the first heating mode and the second heating mode.

Fig. 1 is a schematic structural diagram of the heating system provided in this embodiment, wherein the difference between the second heating mode and the first heating mode is partially represented by a dotted line.

When the heating system is in the first heating mode, the inlet of the first medium channel is communicated with the geothermal well 200, and the outlet of the first medium channel is communicated with the recharge well 300 to form a heat source side passage; the inlet of the second medium channel is communicated with the water return end, and the outlet of the second medium channel is communicated with the water supply end to form a water supply side passage. The water in the heat source side passage and the water in the water supply side passage exchange heat only in the heat exchanger 1, so that the water in the water supply side passage absorbs the heat of the water in the geothermal well 200, and the temperature of the water is raised for the user to use.

When the heating system is in the second heating mode, the inlet of the first medium channel is communicated with the geothermal well 200, the outlet of the first medium channel is communicated with the inlet of the evaporator 21, the outlet of the evaporator 21 is communicated with the recharging well 300, and the first medium channel and the channels in the evaporator 21 jointly form a heat source side passage; the inlet of the second medium channel is communicated with the water return end, the outlet of the second medium channel is communicated with the inlet of the condenser 22, the outlet of the condenser 22 is communicated with the water supply end, and the second medium channel and the channel in the condenser 22 form a water supply side passage together. The water in the heat source side passage and the water in the water supply side passage exchange heat in the heat exchanger 1 and the heat pump module 2 in this order, so that the water in the water supply side passage sufficiently absorbs the heat of the water in the geothermal well 200 to raise the temperature and supply the water to the user.

In the embodiment, the heating system has two heating modes, water is only used for heat exchange in the heat exchanger 1 in the first heating mode, the heating temperature is relatively low, the heating system can be used in the early stage and the later stage of heating, and the problem of over supply and over demand is avoided; the heat pump assembly 2 is not started, so that the electric energy consumption can be reduced under the condition of meeting the heat supply requirement, and more energy is saved. The mode that heat exchanger 1 and heat pump series connection heat supply were adopted to the second heat supply mode, and the water exchanges heat in heat exchanger 1 and heat pump subassembly 2 in proper order, can make full use of geothermol power, improves heat utilization and finally supplies water temperature, can satisfy the user demand of heating cold period, avoids appearing the problem of the supply short of the demand. This heating system uses through the switching of first heat supply mode and second heat supply mode, can satisfy different heating periods to thermal demand, uses more in a flexible way.

When the heating system is in the second heating mode, the geothermal water in the geothermal well 200 firstly exchanges heat with the water in the water supply side passage in the heat exchanger 1 for the first time, the water in the water supply side passage is heated, and the geothermal water is cooled. Geothermal water after the cooling gets into in the heat pump module 2 and the water in the water supply side passageway carries out the heat transfer of second time, can carry out make full use of to geothermal well water, improves heating system's heat utilization ratio, and heating system need not to obtain more heat energy through increase geothermal water flow to heating system's load and operating cost have been reduced.

Alternatively, the heat exchanger 1 in the present embodiment may be a plate heat exchanger. The plate heat exchanger has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, long service life and the like. Under the condition of the same pressure loss, the heat transfer coefficient of the heat exchanger is 3-5 times higher than that of the tubular heat exchanger, the occupied area of the heat exchanger is one third of that of the tubular heat exchanger, and the heat recovery rate can reach more than 90 percent.

In order to avoid the influence of the geothermal water on the heat exchange effect due to the lower temperature during the second heat exchange, the heat pump component 2 in the embodiment is a high-temperature water source heat pump. The lowest limit temperature of the water inlet side of the evaporator 21 of the high-temperature water source heat pump can be 20 ℃, the lowest limit temperature of the outlet side of the condenser 22 is 55 ℃, namely the water temperature of the water supply side can be not lower than 55 ℃ under the condition that the temperature of the heat source side is not lower than 20 ℃, the heat in geothermal water can be fully utilized, and the utilization rate of geothermal heat is improved.

In this embodiment, the heating system further includes a first valve assembly for switching the heat source side passage and a second valve assembly for switching the water supply side passage. The first valve assembly includes a first port connected to the outlet of the second medium passage, a second port connected to the water supply port, and a third port connected to the inlet of the condenser 22, the first port being capable of selectively communicating with the second port or the third port to switch the heat exchange source side passage. The second valve assembly includes a fourth port connected to an outlet of the first medium passage, a fifth port connected to the recharge well 300, and a sixth port connected to an inlet of the evaporator 21, the fourth port being selectively communicable with the fifth port or the sixth port to switch the water supply side passage.

Specifically, the heating system further includes a water supply side pipe assembly. The water supply side pipe assembly includes a first water supply side pipe 111, a second water supply side pipe 112, and a third water supply side pipe 113. An outlet of the second medium passage of the heat exchanger 1 is connected with one end of a first water supply side pipe 111, a second water supply side pipe 112 is connected with the first water supply side pipe 111 and an inlet of the condenser 22, an outlet of the condenser 22 is connected with a water supply end through a third water supply side pipe 113, and a first valve assembly can selectively communicate the other end of the first water supply side pipe 111 with the second water supply side pipe 112 or with the third water supply side pipe 113 to effect switching of the water supply side passage.

In this embodiment, the first valve assembly can switch the communication manner of the water supply side pipe assembly to adjust the water supply side passage. Specifically, the first valve assembly includes a first switching valve 32 and a second switching valve 33, the first switching valve 32 being provided on the first water supply side pipe 111 downstream of the communication of the first water supply side pipe 111 with the second water supply side pipe 112, and the second switching valve 33 being provided on the second water supply side pipe 112.

In this embodiment, the first switch valve 32 can control the on-off of the outlet of the second medium channel and the water supply end; the second on-off valve 33 can control the opening and closing of the outlet of the second medium passage and the inlet of the condenser 22. When the heating system is in the first heating mode, the first on-off valve 32 is opened and the second on-off valve 33 is closed, so that the water flowing out of the second medium passage directly flows to the water supply end. When the heating system is in the second heating mode, the first on-off valve 32 is closed, and the second on-off valve 33 is opened, so that the water flowing out of the second medium channel passes through the condenser 22 and then flows to the water supply end.

In order to prevent the water in the third water supply side pipe 113 from flowing backward into the condenser 22 in the first heating mode, a third on/off valve 34 is further provided on the third water supply side pipe 113, and the third on/off valve 34 is located upstream of the place where the first water supply side pipe 111 communicates with the third water supply side pipe 113. When the heating system is in the first heating mode, the third switching valve 34 is closed; when the heating system is in the second heating mode, the third switching valve 34 is opened.

In some embodiments, the third on/off valve 34 may be replaced by a check valve.

In some embodiments, the first and second switching valves 32 and 33 may be replaced by a three-way valve provided on the first water supply side pipe 111, the pipe connected to both ports of the three-way valve being the first water supply side pipe 111, and the other port of the three-way valve being connected to the second water supply side pipe 112.

The heating system further comprises a heat source side pipe assembly. The heat-source-side tube assembly includes a first heat-source-side tube 121, a second heat-source-side tube 122, a third heat-source-side tube 123, and a fourth heat-source-side tube 124. One end of the first heat-source-side tube 121 is connected to the outlet of the first medium passage, one end of the second heat-source-side tube 122 is connected to the recharge well 300, one end of the third heat-source-side tube 123 is connected to the inlet of the evaporator 21, and both ends of the fourth heat-source-side tube 124 are connected to the outlet of the evaporator 21 and the second heat-source-side tube 122, respectively. The second valve assembly is capable of selectively communicating the other end of the first heat-source-side pipe 121 with the other end of the second heat-source-side pipe 122 or with the other end of the third heat-source-side pipe 123 to effect switching of the heat-source-side passage.

Specifically, the second valve assembly includes a three-way valve 31, three ports of the three-way valve 31 are connected to the other end of the first heat-source-side pipe 121, the other end of the second heat-source-side pipe 122, and the other end of the third heat-source-side pipe 123, respectively, and switching of the heat-source-side passages can be achieved by switching of the three-way valve 31.

When the heating system is in the first heating mode, the three-way valve 31 communicates the first heat-source-side pipe 121 with the second heat-source-side pipe 122, and disconnects the first heat-source-side pipe 121 from the third heat-source-side pipe 123, so that the geothermal well water passes through the heat exchanger 1 and is directly refilled into the refill well 300. When the heating system is in the second heating mode, the three-way valve 31 connects the first heat source-side pipe 121 and the third heat source-side pipe 123, disconnects the first heat source-side pipe 121 and the second heat source-side pipe 122, and allows geothermal well water to pass through the heat exchanger 1, then pass through the evaporator 21 for heat exchange, and then pass through the fourth heat source-side pipe 124, and then be refilled through the second heat source-side pipe 122.

In some embodiments, the three-way valve 31 may be replaced by two switching valves provided on the second heat-source-side pipe 122 and the third heat-source-side pipe 123, respectively, and switching of the heat-source-side passages may also be achieved.

To prevent the water introduced into the second heat-source-side pipe 122 in the first heating mode from flowing back through the fourth heat-source-side pipe 124, a fourth switching valve 35 is further provided on the fourth heat-source-side pipe 124. When the heating system is in the first heating mode, the fourth switching valve 35 is turned off, and when the heating system is in the second heating mode, the fourth switching valve 35 is opened. In some embodiments, the fourth switching valve 35 may be replaced by a check valve.

In order to make the geothermal well water and the water supply in the heating system flow smoothly, the heating system further comprises a deep well pump 61 arranged between the geothermal well 200 and the heat exchanger 1 and a first pump 62 arranged between the return end and the heat exchanger 1. The deep well pump 61 is capable of pumping water out of the geothermal well 200 to drive geothermal water to the heat exchanger 1. The first pump 62 can power the water returning from the return water end to drive the return water through the heat exchanger 1.

Further, a second pump 63 is provided at the inlet end of the first medium passage of the heat exchanger 1, and the second pump 63 is a pressurizing pump. Because of geothermal well 200 is darker, the geothermal water appears the not enough problem of power easily after deep-well pump 61 pumps, through setting up the force (forcing) pump, can supply geothermal water's mobile power, guarantees geothermal well water's velocity of flow and heating system's heating efficiency.

Further, a recharge pump 64 is also provided on the second heat source side pipe 122, and the recharge pump 64 can provide power for recharging the geothermal well water.

In the embodiment, the water supply side passage and the heat source side passage in any heat supply mode are both a branch passage without branches, and the passages are simple in structure and beneficial to reducing the cost.

Because the geothermal well water pump is easy to carry impurities such as sand and soil when pumping out, in order to avoid the pipeline blockage of the heating system, a first sand remover 41 is also arranged between the deep well pump 61 and the second pump 63, and a first sand discharge valve 42 is arranged at a sand discharge port of the first sand remover 41. The first sand remover 41 may be a cyclone sand remover, which can rapidly separate large particles such as gravel from water, and prevent the large particles such as gravel from flowing into the heating system to block the heating system. The first sand discharge valve 42 may be an electrically operated sand removal valve, which can be automatically opened or closed, typically by programmed control.

Alternatively, the first sand removal valve may be opened at intervals of a certain frequency to allow for timed discharge of sand.

Further, because the sand content of the geothermal well water is large, when the deep well pump 61 is restarted, the first sand removing valve can be manually opened for sand removal.

In order to avoid blocking the heating system by the impurities in the water flowing back from the water return end, a dirt remover 7 is further arranged between the water return end and the first pump 62, the dirt in the water can be filtered by the dirt remover 7, and the blocking of the heating system is avoided.

In order to prevent the particles such as rust and suspended matters in the pipes in the heating system from being fed back into the recharging well 300, the second heat source side pipe 122 is provided with a filtering assembly for filtering impurities in the recharging water.

Optionally, the filter assembly comprises a multi-stage filter to filter particles of different sizes layer by layer, thereby improving the filtering effect.

In this embodiment, the filter assembly includes a pocket filter 82 and a cartridge filter 81. The filter bag filter 82 is disposed upstream of the filter cartridge filter 81, and the filter grade of the filter bag filter 82 is smaller than that of the filter cartridge filter 81 to achieve secondary filtration. Wherein, the filter bag filter 82 is mainly used for filtering rust with the diameter of 3-5 μm in water, and the filter element filter 81 is used for filtering small particles with the diameter of 1-3 μm in water.

Furthermore, the drain outlets of the filter bag filter 82 and the filter element filter 81 are provided with drain valves, and the drain valves are opened at certain intervals so as to drain sewage regularly and ensure the filtering effect. Alternatively, the drain valves on the bag filter 82 and the cartridge filter 81 may be opened every one hour interval.

Further, an air discharge tank 9 is provided between the filter assembly and the recharge pump 64. The exhaust tank 9 can exhaust the gas in the pipeline, prevent the gas from entering the recharge pump 64 to cause unnecessary loss, or prevent the gas from recharging to the underground to obstruct the recharge of geothermal water.

Because reasons such as pipeline damage, user's maintenance and system degritting can lead to heating system water to reveal, in order to guarantee heating system's steady operation, need in time carry out the moisturizing to the system. For this purpose, the heating system further comprises a refill assembly 5, the refill assembly 5 being adapted to refill between the refill end and the inlet of the second medium passage.

In this embodiment, since only one branch is provided in the heat source side passage and pumped out from the geothermal well 200 to be refilled into the refill well 300, even if water is replenished to the passage, the replenished water will flow back into the refill well 300, and therefore, the water replenishing assembly 5 in this embodiment only needs to replenish water to the water supply side passage. Furthermore, the water supply side passage is only provided with one branch without other closed branches, so that the water supplementing point of the whole heating system is only one position of the water returning end, and the water supplementing assembly 5 is simple in structure and low in cost. Specifically, the water replenishing assembly 5 includes a water tank 53 and a water replenishing pump 54, and the water replenishing pump 54 is used for pumping water in the water tank 53 to between the water return end and the dirt separator 7.

Further, the refill assembly 5 further includes a third pump 51 and a second sand remover 52. The third pump 51 is used to pump water into the water tank 53. The second sand remover 52 is disposed between the third pump 51 and the water tank 53, and can prevent sand from entering the water tank 53.

Example two

As shown in fig. 2, the present embodiment provides a geothermal energy source station 100, which includes a container 101 and a heating system provided in the first embodiment, and part of the heating system is disposed in the container 101.

This geothermal energy source station 100 can realize the modularization and the standardization of geothermal energy source station 100 through in integrating part heating system in container 101 for geothermal energy source station 100 can carry out modularization pre-installation and quantization production at the producer, does not need on-the-spot equipment and debugging, greatly reduced geothermal energy source station 100's construction cost, shortened construction cycle.

In this embodiment, the heat pump module 2 in the heating system is disposed outside the container 101, the rest structures are disposed in the container 101, and the container 101 is provided with a plurality of interfaces to facilitate the structural connection in the heating system and the connection between the heating system and the external devices (such as the geothermal well 200, the recharge well 300, the water return end, and the water supply end).

Specifically, the container 101 is provided with a water supply interface 1011, a water return interface 1012, a geothermal interface 1013, a recharge interface 1014, a condenser inlet interface 1017, a condenser outlet interface 1016, an evaporator inlet interface 1019, and an evaporator outlet interface 1018. The inlet of the first media channel communicates with the geothermal well 200 through the geothermal interface 1013, the outlet of the first media channel can selectively communicate with the recharge interface 1014 or the evaporator inlet interface 1019, and the recharge interface 1014 communicates with the recharge well 300. The inlet of the second medium channel is communicated with the water return end through the water return interface 1012, the outlet of the second medium channel can be selectively communicated with the water supply interface 1011 or the condenser inlet interface 1017, and the water supply interface 1011 is communicated with the water supply end.

When the heating system is in the first heating mode, the inlet of the first media channel communicates with the geothermal interface 1013 and the outlet of the first media channel communicates with the recharge interface 1014 to form a heat source side passage; the inlet of the second medium channel communicates with the water return port 1012, and the outlet of the second medium channel communicates with the water supply port 1011 to form a water supply side passage. The water in the heat source side passage and the water in the water supply side passage exchange heat in the heat exchanger 1, so that the water in the water supply side passage absorbs the heat of the water in the geothermal well 200, and the temperature of the water is raised for the user to use.

When the heating system is in the second heating mode, the inlet of the first medium channel is communicated with the geothermal interface 1013, the outlet of the first medium channel is communicated with the evaporator inlet interface 1019, the evaporator outlet interface 1018 is communicated with the recharge interface 1014, and the first medium channel and the channels in the evaporator 21 jointly form a heat source side passage; the inlet of the second medium channel is communicated with a water return interface 1012, the outlet of the second medium channel is communicated with a condenser inlet interface 1017, a condenser outlet interface 1016 is communicated with a water supply interface 1011, and the second medium channel and the channel in the condenser 22 form a water supply side passage together. The water in the heat source side passage and the water in the water supply side passage exchange heat in the heat exchanger 1 and the heat pump module 2 in this order, so that the water in the water supply side passage sufficiently absorbs the heat of the water in the geothermal well 200 to raise the temperature and supply the water to the user.

In this embodiment, the heating system uses through the switching of first heating mode and second heating mode, can satisfy different heating periods to thermal demand, uses more in a flexible way.

Optionally, the geothermal energy source station 100 further comprises a water replenishing assembly 5, wherein the water replenishing assembly 5 is arranged in the container 101 and is used for replenishing water into a pipeline between the water returning interface 1012 and the inlet of the second medium channel, so as to avoid the problem of unstable operation caused by water leakage of a heating system. Alternatively, the specific structure of the refill unit 5 may refer to the structure of the first embodiment.

Correspondingly, a water replenishing interface 1015 is arranged on the container 101, and the inlet end of the second sand remover 52 in the water replenishing assembly 5 is connected with the water replenishing interface 1015.

EXAMPLE III

The present embodiment provides a geothermal energy source station 100, which is different from the second embodiment in that the heat pump module 2 in the present embodiment is disposed in the container 101, and only the water supply interface 1011, the water return interface 1012, the geothermal interface 1013, and the recharge interface 1014 are disposed on the container 101, so that the modularization degree of the geothermal energy source station 100 can be further improved.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A heating system is characterized by comprising a geothermal well (200), a heat exchanger (1), a water supply end, a water return end, a recharging well (300) and a heat pump assembly (2);

a first medium channel and a second medium channel are arranged in the heat exchanger (1), a first medium in the first medium channel and a second medium in the second medium channel can exchange heat, an inlet of the first medium channel is communicated with the geothermal well (200), and an inlet of the second medium channel is communicated with the water return end;

the heat pump assembly (2) comprises an evaporator (21) and a condenser (22), and heat exchange is carried out between the evaporator (21) and the condenser (22) through a third medium;

the outlet of the first medium channel can be selectively communicated with the inlet of the recharging well (300) or the evaporator (21), and the outlet of the second medium channel can be selectively communicated with the water supply end or the inlet of the condenser (22).

2. A heating system according to claim 1, wherein the heating system is switchable between a first heating mode and a second heating mode;

when the heating system is in the first heating mode, the outlet of the first medium channel is communicated with the recharging well (300), and the outlet of the second medium channel is communicated with the water supply end;

when the heating system is in the second heating mode, the outlet of the first medium channel is communicated with the inlet of the evaporator (21), the outlet of the evaporator (21) is communicated with the recharging well (300), the outlet of the second medium channel is communicated with the inlet of the condenser (22), and the outlet of the condenser (22) is communicated with the water supply end.

3. A heating system according to claim 1, further comprising a first valve assembly and a second valve assembly, the first valve assembly comprising a first port connecting the outlet of the second medium passage, a second port connecting the water supply port, and a third port connecting the inlet of the condenser (22), the first port being selectively communicable with either the second port or the third port; the second valve assembly comprises a fourth port connected to an outlet of the first media path, a fifth port connected to the recharge well (300), and a sixth port connected to an inlet of the evaporator (21), the fourth port being selectively communicable with either the fifth port or the sixth port.

4. A heating system according to claim 3, wherein the first valve assembly comprises: a first switching valve (32) connecting an outlet of the second medium passage and the water supply end;

and a second on-off valve (33) connecting an outlet of the second medium passage and an inlet of the condenser (22).

5. A heating system according to claim 3, wherein the second valve assembly comprises a three-way valve (31), three ports of the three-way valve (31) being the fourth, fifth and sixth ports, respectively.

6. A heating system according to any one of claims 1-5, characterized in that the heating system further comprises a water refill assembly (5), the water refill assembly (5) comprising a water tank (53) and a water refill pump (54), the water refill pump (54) being adapted to pump water in the water tank (53) to the return end.

7. A heating system according to any one of claims 1-5, wherein the inlet end of the recharge well (300) is provided with a filter assembly;

the filter assembly comprises at least two stages of filters, and the filtering grades of the at least two stages of filters are increased step by step along the recharging direction.

8. A geothermal energy source station, comprising:

a container (101);

a heating system according to any one of claims 1-7, at least part of the heating system being arranged in the container (101).

9. The geothermal energy source station according to claim 8, wherein the container (101) is provided with a water supply interface (1011), a water return interface (1012), a geothermal interface (1013), a recharge interface (1014), a condenser inlet interface (1017), a condenser outlet interface (1016), an evaporator inlet interface (1019) and an evaporator outlet interface (1018);

the heat exchanger (1) is arranged in the container (101), the inlet of the first medium channel is communicated with the geothermal well (200) through the geothermal joint (1013), the inlet of the second medium channel is communicated with the water return end through the water return joint (1012), the recharge joint (1014) is communicated with the recharge well (300), and the water supply joint (1011) is communicated with the water supply end;

the heat pump assembly (2) is disposed outside the container (101), the inlet of the evaporator (21) is in communication with the evaporator inlet interface (1019), the outlet of the evaporator (21) is in communication with the evaporator outlet interface (1018), the inlet of the condenser (22) is in communication with the condenser inlet interface (1017), and the outlet of the condenser (22) is in communication with the condenser outlet interface (1016);

the outlet of the first medium channel can be selectively communicated with the recharge interface (1014) or the evaporator inlet interface (1019), and the outlet of the second medium channel can be selectively communicated with the water supply interface (1011) or the condenser inlet interface (1017).

10. The geothermal energy source station according to claim 8, wherein the container (101) is provided with a water supply interface (1011), a water return interface (1012), a geothermal interface (1013) and a recharge interface (1014);

the heating system is arranged in the container (101), the inlet of the first medium channel is communicated with the geothermal interface (1013), and the water supply interface (1011) can be selectively communicated with the outlet of the first medium channel or the outlet of the evaporator (21);

the inlet of the second medium channel is communicated with the water return interface (1012), and the water supply interface (1011) can be selectively communicated with the outlet of the second medium channel or the outlet of the condenser (22).

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