Heating system

Abstract

The utility model discloses a heating system, which comprises a primary heat exchanger, a secondary heat exchanger, a secondary heat exchanger and a heating device, two ends of the primary pipeline are respectively connected with the primary heat exchanger, and the primary pipeline is provided with a liquid supply pipe and a liquid return pipe; an evaporator of the heat pump is provided with a first heat exchange flow channel, an inlet of the first heat exchange flow channel is connected with the liquid return pipe, a condenser of the heat pump is provided with a second heat exchange flow channel, an inlet of the second heat exchange flow channel is connected with an outlet of the first heat exchange flow channel, and an outlet of the second heat exchange flow channel is connected with the liquid supply pipe; and the heat pump is configured to absorb the heat of the fluid in the liquid return pipe and supplement the heated fluid into the liquid supply pipe. According to the heating system disclosed by the utility model, the flow of the fluid for supplying heat to the heat users in the first-stage pipeline is effectively increased, so that the heat supply quantity of the heating system to the heat users is well increased, the heat supply capacity of the heating system is well improved, and the heating system can better meet the heating requirements of the heat users.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, in particular to a heating system. Background Art

[0002] With the rapid development of China's social economy, the heating area in cities and towns has increased rapidly, and the heating demand is strong. As a result, the heat transfer capacity of the original heating pipeline network is difficult to meet the growth of the heat load. Moreover, with the aging of the heating pipeline network, it is difficult to increase the supply water temperature and flow rate for heat transfer in the heating pipeline network, which further reduces the heat transfer capacity of the heating pipeline network, making it difficult to meet the heating needs of heat users. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a heating system, which can well improve the heat transfer capacity of the pipeline and better meet the heating needs of heat users.

[0004] The heating system according to the utility model includes: a primary heat exchanger for heat exchange with a heat source; a primary pipeline, the two ends of which are respectively connected to the primary heat exchanger, and the primary pipeline has a liquid supply pipe and a liquid return pipe; a heat pump, the evaporator of which has a first heat exchange channel, the inlet of the first heat exchange channel is connected to the liquid return pipe, the condenser of the heat pump has a second heat exchange channel, the inlet of the second heat exchange channel is connected to the outlet of the first heat exchange channel, the outlet of the second heat exchange channel is connected to the liquid supply pipe, and the heat pump is configured to absorb the heat of the fluid in the liquid return pipe and supplement the heated fluid into the liquid supply pipe.

[0005] In the heating system according to the utility model, by setting the primary pipeline and the heat pump, the heat pump heats a part of the fluid in the liquid return pipe and supplements it into the liquid supply pipe, thereby effectively increasing the flow rate of the fluid for heating heat users in the primary pipeline, and thus well increasing the heat supply of the heating system to heat users, improving the heat supply capacity of the heating system, and enabling the heating system to better meet the heating needs of heat users.

[0006] In some embodiments of the utility model, the heating system further includes a first connecting pipeline, one end of which is connected to the outlet of the first heat exchange channel, the other end of which is connected to the liquid supply pipe, and the second heat exchange channel is connected in series in the first connecting pipeline.

[0007] In an embodiment of the present utility model, the first connection pipeline includes: a first flow channel pipe, which is connected between the first heat exchange flow channel and the second heat exchange flow channel, and a first water pump and a first control valve are connected in series on the first flow channel pipe; a second flow channel pipe, which is connected between the second heat exchange flow channel and the liquid supply pipe.

[0008] In some examples of the present utility model, the first connection pipeline further includes a heater, which is connected in series on the second flow channel pipe.

[0009] In an example of the present utility model, the heating system further includes a heat storage device, which is connected in series on the second flow channel pipe and is located downstream of the heater in the fluid flow direction. A second control valve is connected in series on the second flow channel pipe, and the second control valve is located between the heat storage device and the liquid supply pipe.

[0010] In some embodiments of the present utility model, the heating system further includes: a second connection pipeline, one end of which is connected to the liquid return pipe and the other end is connected to the inlet of the first heat exchange flow channel, and a third control valve is connected in series on the second connection pipeline.

[0011] In an embodiment of the present utility model, the heating system further includes: a third connection pipeline, one end of which is connected to the outlet of the first heat exchange flow channel and the other end is connected to the liquid return pipe, and the other end of the third connection pipeline is located downstream of the second connection pipeline in the fluid flow direction in the liquid return pipe. A second water pump and a fourth control valve are connected in series on the third connection pipeline.

[0012] In some embodiments of the present utility model, the heat pump is a carbon dioxide water source heat pump.

[0013] In some embodiments of the present utility model, the heating system further includes: a secondary heat exchanger and a secondary pipeline. The secondary heat exchanger includes a first heat exchange channel and a second heat exchange channel that perform heat exchange with each other. The first heat exchange channel is connected in series in the primary pipeline, and the second heat exchange channel is connected in series in the secondary pipeline. The secondary pipeline is used to supply heat to heat users.

[0014] In some embodiments of the present utility model, the heating system further includes a heat source pipeline. The primary heat exchanger includes a third heat exchange channel and a fourth heat exchange channel that perform heat exchange with each other. The third heat exchange channel is connected in series in the heat source pipeline, and the fourth heat exchange channel is connected in series in the primary pipeline.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0016] Figure 1 is a schematic diagram of a heating system according to an embodiment of the present utility model.

[0017] Reference Signs:

[0018] 10, heat source;

[0019] 20, heat source pipeline; 30, primary pipeline; 31, liquid supply pipe; 32, liquid return pipe; 40, secondary pipeline;

[0020] 50, heat pump; 51, evaporator; 511, first heat exchange flow channel; 52, condenser; 521, second heat exchange flow channel;

[0021] 61, first connection pipeline; 611, first flow channel pipe; 612, second flow channel pipe;

[0022] 62, second connection pipeline; 63, third connection pipeline;

[0023] 71, primary heat exchanger; 72, secondary heat exchanger; 73, heater; 74, heat storage tank; 75, first water pump; 76, second water pump; 77, third water pump; 78, fourth water pump;

[0024] 81, first control valve; 82, second control valve; 83, third control valve; 84, fourth control valve; 85, fifth control valve; 86, sixth control valve; 87, seventh control valve;

[0025] 100, heating system; 101, heat user. Detailed Embodiment

[0026] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0027] Reference is made below to Figure 1 describe the heating system 100 according to an embodiment of the present utility model.

[0028] As Figure 1As shown, the heating system 100 according to an embodiment of the present invention includes: a primary heat exchanger 71 configured to perform heat exchange with a heat source 10; a primary pipeline 30, both ends of the primary pipeline 30 are respectively connected to the primary heat exchanger 71, and the primary pipeline 30 has a supply pipe 31 and a return pipe 32; a heat pump 50, the evaporator 51 of the heat pump 50 has a first heat exchange channel 511, the inlet of the first heat exchange channel 511 is connected to the return pipe 32, the condenser 52 of the heat pump 50 has a second heat exchange channel 521, the inlet of the second heat exchange channel 521 is connected to the outlet of the first heat exchange channel 511, and the outlet of the second heat exchange channel 521 is connected to the supply pipe 31. The heat pump 50 is configured to absorb the heat of the fluid in the return pipe 32 and supplement the heated fluid into the supply pipe 31.

[0029] In this embodiment, the primary heat exchanger 71 is provided to perform heat exchange with the heat source 10, and both ends of the primary pipeline 30 are respectively connected to the primary heat exchanger 71, so that the heat of the heat source 10 can be well transferred to the fluid in the primary pipeline 30, thereby heat can be delivered to the heat user 101. Specifically, the primary pipeline 30 includes a supply pipe 31 and a return pipe 32. After the fluid exchanges heat with the heat source 10 at the primary heat exchanger 71, the temperature of the fluid rises. The fluid carries a large amount of heat and flows along the supply pipe 31 to the heat user 101 end, thereby supplying heat to the heat user 101 end. After the fluid supplies heat to the heat user 101, the temperature decreases and it flows back to the primary heat exchanger 71 along the return pipe 32. Thus, the fluid can continuously transfer the heat from the heat source 10 to the heat user 101 through the cyclic flow in the primary pipeline 30, realizing the heating operation of the heating system 100 for the heat user 101.

[0030] It can be understood that with the increase in the number of heat users 101 and the increase in the heating area, the required heat supply at the heat user 101 end also increases correspondingly. This makes it difficult for the designed heat transfer capacity of the primary pipeline 30 to meet the needs. Moreover, due to the aging of the pipelines of the heating system 100, it is difficult to increase the fluid temperature and fluid flow rate in the primary pipeline 30, so that the heating system 100 is difficult to meet the heating needs of the heat user 101.

[0031] In this embodiment, a heat pump 50 is provided. The evaporator 51 of the heat pump 50 has a first heat exchange flow channel 511, and the condenser 52 of the heat pump 50 has a second heat exchange flow channel 521. Among them, the inlet of the first heat exchange flow channel 511 is connected to the liquid return pipe 32, and the outlet is connected to the inlet of the second heat exchange flow channel 521. The outlet of the second heat exchange flow channel 521 is connected to the liquid supply pipe 31. During the operation of the heating system 100, a part of the fluid flowing along the liquid return pipe 32 to the primary heat exchanger 71 flows into the first heat exchange flow channel 511 of the heat pump 50. After the fluid further releases heat and cools down at the evaporator 51, it flows into the second heat exchange flow channel 521 of the condenser 52. At the second heat exchange flow channel 521, the heat pump 50 heats the fluid by the work done by the compressor and the heat energy absorbed at the evaporator 51, so that the temperature of the fluid flowing out of the heat pump 50 is relatively high and carries sufficient heat, and the fluid heated by the heat pump 50 can meet the heating requirements of the primary pipeline 30.

[0032] When the heating system 100 is operating, the fluid exchanges heat with the heat source 10 in the primary heat exchanger 71 to obtain heat. The fluid carries the heat and flows along the liquid supply pipe 31. Before the fluid exchanges heat with the heat user 101 for heating, it is mixed with the fluid from the heat pump 50, so that the flow rate of the fluid increases and it carries more heat. The fluid with a larger flow rate exchanges heat with the heat user 101 to provide more heat to the heat user 101, so as to meet the heating requirements of the heat user 101. The fluid flowing along the liquid return pipe 32 after exchanging heat with the heat user 101, a part of the fluid flows to the heat pump 50 and the other part continues to flow along the liquid return pipe 32 to the primary heat exchanger 71, so that the fluid circulates in the primary pipeline 30 and the heat pump 50.

[0033] The fluid heated by the heat pump 50 flows into the liquid supply pipe 31, and after being mixed with the fluid from the primary heat exchanger 71 in the liquid supply pipe 31, it flows towards the heat user 101 end, increasing the flow rate of the fluid at the heat user 101 end, so that the primary pipeline 30 can transport more heat to the heat user 101, enabling the heating system 100 to have a greater heat transfer capacity, and thus enabling the heating system 100 to better meet the heating requirements of the heat user 101.

[0034] According to the heating system 100 of the embodiment of the present invention, by providing the primary pipeline 30 and the heat pump 50, the heat pump 50 heats a part of the fluid in the liquid return pipe 32 and supplements it into the liquid supply pipe 31, thereby effectively increasing the flow rate of the fluid supplying heat to the heat user 101 in the primary pipeline 30, thus greatly increasing the heat supply of the heating system 100 to the heat user 101, improving the heat supply capacity of the heating system 100, and enabling the heating system 100 to better meet the heating requirements of the heat user 101.

[0035] In some embodiments of the present invention, such as Figure 1As shown, the heating system 100 may further include a first connecting pipeline 61. One end of the first connecting pipeline 61 is connected to the outlet of the first heat exchange flow channel 511, and the other end of the first connecting pipeline 61 is connected to the liquid supply pipe 31. The second heat exchange flow channel 521 is connected in series in the first connecting pipeline 61.

[0036] When the heating system 100 operates, the fluid flows from the outlet of the first heat exchange flow channel 511 along the first connecting pipeline 61 through the second heat exchange flow channel 521. After being heated in the second heat exchange flow channel 521, the fluid continues to flow along the first connecting pipeline 61 towards the liquid supply pipe 31, thereby increasing the flow rate of the fluid flowing towards the heat user 101 end, enabling the heat user 101 end to obtain more heat, and enabling the heating system 100 to better meet the heating needs of the heat user 101. In this embodiment, the first connecting pipeline 61 is provided. The first connecting pipeline 61 is connected to the outlet of the first heat exchange flow channel 511 and the liquid supply pipe 31, and the second heat exchange flow channel 521 is connected in series in the first connecting pipeline 61, with a simple structure and convenient layout.

[0037] In an embodiment of the present utility model, as Figure 1 shown, the first connecting pipeline 61 may include: a first flow channel pipe 611 and a second flow channel pipe 612. The first flow channel pipe 611 is connected between the first heat exchange flow channel 511 and the second heat exchange flow channel 521, and a first water pump 75 and a first control valve 81 are connected in series on the first flow channel pipe 611; the second flow channel pipe 612 is connected between the second heat exchange flow channel 521 and the liquid supply pipe 31.

[0038] In this embodiment, the first connecting pipeline 61 is provided with the first flow channel pipe 611 and the second flow channel pipe 612. The first flow channel pipe 611 is connected between the first heat exchange flow channel 511 and the second heat exchange flow channel 521, and the second flow channel pipe 612 is connected between the second heat exchange flow channel 521 and the liquid supply pipe 31, with a simple structure, facilitating the assembly of the first connecting pipeline 61 with the heat pump 50 and the liquid supply pipe 31, and facilitating the sectional maintenance of the first connecting pipeline 61, enabling the heating system 100 to operate stably.

[0039] In this embodiment, the first water pump 75 is provided on the first flow channel pipe 611. The first water pump 75 can provide a stable driving force for the fluid to flow from the first heat exchange flow channel 511 to the second heat exchange flow channel 521, so that the fluid can stably and reliably flow along the first flow channel pipe 611 into the second heat exchange flow channel 521 and the liquid supply pipe 31.

[0040] In this embodiment, the first control valve 81 is provided on the first flow channel pipe 611, which can control the flow rate in the first flow channel pipe 611, so that the heating system 100 can regulate the fluid flow rate flowing into the second heat exchange flow channel 521 according to the heating situation and the operating conditions of the heat pump 50, enabling the heat pump 50 to stably and reliably heat the fluid and enabling the heating system 100 to operate stably.

[0041] In some examples of the present utility model, the first connection pipeline 61 may further include a heater 73, and the heater 73 is connected in series on the second flow channel pipe 612.

[0042] It can be understood that during the operation of the heat pump 50, the temperature of the fluid after being heated by the heat pump 50 has a certain fluctuation. In this embodiment, the heater 73 is provided, so that the heater 73 can perform corresponding heating according to the temperature of the fluid, so that the temperature of the fluid flowing to the liquid supply pipe 31 can be kept constant and stably and reliably meet the heating needs of the heating system 100, so that the heating system 100 can operate stably and reliably.

[0043] In an example of the present utility model, as Figure 1 shown, the heating system 100 may further include a heat storage device 74, the heat storage device 74 is connected in series on the second flow channel pipe 612, and is located downstream of the heater 73 in the fluid flow direction. A second control valve 82 is connected in series on the second flow channel pipe 612, and the second control valve 82 is located between the heat storage device 74 and the liquid supply pipe 31.

[0044] In this embodiment, the heat storage device 74 is provided, and the heat storage device 74 is arranged downstream of the heater 73 in the fluid flow direction, which can store the fluid from the heater 73 and the heat pump 50, so that the flow rate of the fluid flowing into the liquid supply pipe 31 can be well regulated, which is convenient for the heating system 100 to adjust the heat output to the heat user 101, so that the heating system 100 can more conveniently adjust the heating plan according to the actual heating situation, so that the heating system 100 can provide better heating services for the heat user 101 and make the heating system 100 operate more stably.

[0045] It can be understood that a large amount of electricity is consumed during the operation of the heating system 100, and the electricity price is different at different times. In this embodiment, the heat storage device 74 is provided, and the heat storage device 74 can store the fluid from the heater 73, so that the heating system 100 can flexibly adjust the operation mode according to the real-time electricity price situation to reduce the operation cost.

[0046] Exemplarily, during the period with a lower electricity price, the heat pump 50 and the heater 73 in the heating system 100 can operate normally. When the fluid flows through the heat storage device 74, part of the fluid is stored in the heat storage device 74, so that the heat storage device 74 gradually accumulates and stores heat. During the period with a higher electricity price, the fluid stored in the heat storage device 74 flows into the liquid supply pipe 31 along the second flow channel pipe 612 to meet the heat output needs of the heating system 100, and the heat pump 50 and the heater 73 can reduce the operation power or stop operating according to the needs, so as to reduce the use of electricity and the operation cost, and make the heating system 100 more economical during operation.

[0047] In this embodiment, a second control valve 82 is connected in series on the second flow channel pipe 612, which can facilitate controlling the flow rate of the fluid in the second flow channel pipe 612 flowing to the supply pipe 31. Thus, the fluid flow in the heating system 100 can be regulated more conveniently and flexibly, enabling the heating system 100 to adjust heat transfer more flexibly and conveniently according to the actual situation, and making the heating system 100 operate more stably.

[0048] In some embodiments of the present utility model, as Figure 1 shown, the heating system 100 may further include: a second connection pipeline 62, one end of the second connection pipeline 62 is connected to the return pipe 32 and the other end is connected to the inlet of the first heat exchange flow channel 511. A third control valve 83 is connected in series on the second connection pipeline 62.

[0049] In this embodiment, the second connection pipeline 62 is provided. The second connection pipeline 62 is connected between the return pipe 32 and the inlet of the second heat exchange flow channel 521, which can meet the need for the fluid to flow from the return pipe 32 to the second heat exchange flow channel 521. The third control valve 83 is provided on the second connection pipeline 62, enabling the flow rate of the fluid flowing to the second heat exchange flow channel 521 to be adjusted and controlled flexibly as needed, enabling the heat pump 50 to maintain a good operating state and perform efficient heating. Thus, the heating system 100 can maintain an efficient and stable operating state.

[0050] In an embodiment of the present utility model, as Figure 1 shown, the heating system 100 may further include: a third connection pipeline 63, one end of the third connection pipeline 63 is connected to the outlet of the first heat exchange flow channel 511 and the other end is connected to the return pipe 32. The other end of the third connection pipeline 63 is located downstream of the fluid flow direction of the second connection pipeline 62 in the return pipe 32. A second water pump 76 and a fourth control valve 84 are connected in series on the third connection pipeline 63.

[0051] In this embodiment, a third connecting pipeline 63 is provided. The third connecting pipeline 63 is connected to the outlet of the first heat exchange channel 511 and the liquid return pipe 32. The other end of the third connecting pipeline 63 is located downstream of the fluid flow direction of the second connecting pipeline 62 in the liquid return pipe 32. That is to say, in the fluid flow direction of the liquid return pipe 32, the position where the third connecting pipeline 63 is connected to the liquid return pipe 32 is downstream of the position where the second connecting pipeline 62 is connected to the liquid return pipe 32. When the heating system 100 operates, during the process of the fluid flowing along the liquid return pipe 32, part of the fluid enters the evaporator 51 of the heat pump 50 along the second connecting pipeline 62 and is cooled in the first heat exchange channel 511. Part of the fluid continues to flow along the liquid return pipe 32. After being cooled by the heat pump 50, part of the fluid flows along the first connecting pipeline 61 to the second heat exchange channel 521, and the other part of the fluid flows back to the liquid return pipe 32 along the third connecting pipeline 63. The fluid flowing into the liquid return pipe 32 along the third pipeline is mixed with the fluid continuously flowing in the liquid return pipe 32, so that the temperature of the fluid in the liquid return pipe 32 is reduced. The fluid with reduced temperature stably flows along the return pipe to the primary heat exchanger 71 for heat exchange with the heat source 10.

[0052] In this embodiment, by providing the third connecting pipeline 63 to connect the outlet of the first heat exchange channel 511 with the liquid return pipe 32, the cooled fluid is mixed with the fluid in the liquid return pipe 32, thus effectively reducing the temperature of the fluid flowing to the primary heat exchanger 71. The fluid can carry more heat to the heat user 101 end at the primary heat exchanger 71, thereby effectively improving the heat transfer capacity of the heating system 100 and enabling the heating system 100 to better meet the heating needs of the heat user 101.

[0053] In this embodiment, the position where the third connecting pipeline 63 is connected to the liquid return pipe 32 is set downstream of the position where the second connecting pipeline 62 is connected to the liquid return pipe 32, which can effectively prevent the cooled fluid from flowing back into the first heat exchange channel 511 after being mixed with the fluid in the liquid return pipe 32. Thus, the temperature of the fluid flowing into the first heat exchange channel 511 is relatively stable. Furthermore, when the heat pump 50 operates, it can obtain stable heat at the evaporator 51 to heat the fluid at the condenser 52, enabling the heat pump 50 to operate more stably and reliably, and thus making the heating system 100 operate more stably.

[0054] In this embodiment, when the heat pump 50 operates, as the heat pump 50 cools and lowers the temperature of a part of the fluid in the liquid return pipe 32, the temperature of the fluid flowing into the primary heat exchanger 71 in the liquid return pipe 32 decreases. And the heat pump 50 supplements a part of the fluid to the supply pipe 31 of the primary pipeline 30 after heating it, so as to increase the fluid flow rate flowing towards the heat user 101 end. As a result, the heat transfer capacity of the heating system 100 is greatly improved, effectively alleviating the problem of insufficient heat transfer capacity of the heating system 100, and enabling the heating system 100 to better meet the heating needs of the heat user 101.

[0055] In this embodiment, a second water pump 76 and a fourth control valve 84 are provided on the third connecting pipeline 63. The second water pump 76 can provide a stable driving force for the fluid in the third connecting pipeline 63 to flow into the liquid return pipe 32, enabling the fluid to flow stably into the liquid return pipe 32. The fourth control valve 84 provided on the third connecting pipeline 63 enables the heating system 100 to flexibly and conveniently regulate the flow rate of the fluid flowing into the liquid return pipe 32 according to actual needs. As a result, the fluid flow rates in the first connecting pipeline 61, the second connecting pipeline 62, and the third connecting pipeline 63 can be better adjusted and controlled, so that the fluid flow rates in each pipeline can meet the requirements for the efficient operation of the heat pump 50 and the heat transfer of the fluid in the primary pipeline 30, enabling the heating system 100 to operate more stably and efficiently.

[0056] In an embodiment of the present utility model, as Figure 1 shown, a fifth control valve 85 may also be provided on the liquid return pipe 32, and the fifth control valve 85 is located between the connection position of the second connecting pipeline 62 on the liquid return pipe 32 and the connection position of the third connecting pipeline 63 on the liquid return pipe 32.

[0057] In this embodiment, by providing the fifth control valve 85 on the liquid return pipe 32, it can cooperate with the third control valve 83 on the second connecting pipeline 62 to more flexibly and stably adjust the flow rate of the fluid flowing into the first heat exchange channel 511 in the liquid return pipe 32 and the flow rate of the fluid continuing to flow along the liquid return pipe 32, enabling the fluid flow rate in the pipeline to be better regulated according to needs. As a result, the heating system 100 can operate more efficiently and stably.

[0058] In some embodiments of the present utility model, as Figure 1 shown, a sixth control valve 86 and a third water pump 77 may be provided on the supply pipe 31. In the direction of the fluid flow in the supply pipe 31, both the sixth control valve 86 and the third water pump 77 are arranged upstream of the connection position between the first connecting pipeline 61 and the supply pipe 31.

[0059] In this embodiment, a sixth control valve 86 is provided, which can conveniently adjust the fluid flow rate from the primary heat exchanger 71 to the secondary heat exchanger 72, so as to facilitate the heating system 100 to flexibly adjust heat transfer according to the actual situation, enabling the flow rates of the fluids in each pipeline of the heating system 100 to be adjusted and controlled as a whole according to needs, making the fluid flow in the heating system 100 more stable and balanced, and enabling the heating system 100 to carry out heat transfer and heating operations stably and reliably. In this embodiment, a third water pump 77 is provided. The third water pump 77 can drive the fluid to flow stably along the liquid supply pipe 31 to the secondary heat exchanger 72, and can avoid the reverse flow of the fluid flowing in along the first connection pipeline 61, so that the fluid in the primary pipeline 30 can flow stably in a fixed direction, and the heating system 100 can stably transfer heat to the heat user 101.

[0060] In some embodiments of the present invention, as Figure 1 shown, the heat pump 50 can be a carbon dioxide water source heat pump.

[0061] The carbon dioxide water source heat pump uses carbon dioxide as the refrigerant. The carbon dioxide heat pump 50 can operate in a supercritical state, with high system operation efficiency, and can operate efficiently at a lower ambient temperature and provide a higher hot water temperature. In this embodiment, the heat pump 50 is set as a carbon dioxide water source heat pump. During the operation of the heat pump 50, after the fluid exchanges heat and cools down in the first heat exchange flow channel 511 of the evaporator 51 and then flows to the second heat exchange flow channel 521, the temperature of the fluid entering the condenser 52 is relatively low. The lower inlet flow temperature at the condenser 52 can make the carbon dioxide heat pump 50 operate more efficiently, so that the fluid can more easily reach the fluid temperature required for heating in the primary pipeline 30 after being heated by the heat pump 50, enabling the heat pump 50 to better meet the needs of fluid heating and stably improve the heat transfer capacity of the heating system 100.

[0062] In some embodiments of the present invention, as Figure 1 shown, the heating system 100 may further include: a secondary heat exchanger 72 and a secondary pipeline 40. The secondary heat exchanger 72 includes a first heat exchange channel and a second heat exchange channel that exchange heat with each other. The first heat exchange channel is connected in series in the primary pipeline 30, and the second heat exchange channel is connected in series in the secondary pipeline 40. The secondary pipeline 40 is used to supply heat to the heat user 101.

[0063] In this embodiment, a secondary heat exchanger 72 and a secondary pipeline 40 are provided. The primary pipeline 30 exchanges heat with the secondary pipeline 40 through the secondary heat exchanger 72, so that heat can be transferred into the secondary pipeline 40, and then heat is supplied to the heat user 101. Specifically, the fluid carrying a large amount of heat in the supply pipe 31 flows through the first heat exchange channel, and the fluid in the secondary pipeline 40 flows through the second heat exchange channel and exchanges heat with the fluid in the first heat exchange channel. The heat is transferred to the fluid in the secondary pipeline 40, and then the fluid flows along the secondary pipeline 40 to each heat user 101 to meet the heating needs of the heat user 101. After the fluid is used for heating, it flows along the secondary pipeline 40 back into the second heat exchange channel of the secondary heat exchanger 72, and circulates in this way to continuously supply heat to the heat user 101.

[0064] The fluid in the primary pipeline 30 passes through the first heat exchange channel and exchanges heat with the fluid in the secondary pipeline 40, and then its temperature drops. The fluid with the reduced temperature flows along the return pipe 32 to the primary heat exchanger 71 to exchange heat with the heat source 10, and circulates in this way to continuously transfer heat to the secondary pipeline 40.

[0065] In some embodiments of the present invention, as Figure 1 shown, the heating system 100 may further include a heat source pipeline 20. The primary heat exchanger 71 includes a third heat exchange channel and a fourth heat exchange channel that exchange heat with each other. The third heat exchange channel is connected in series in the heat source pipeline 20, and the fourth heat exchange channel is connected in series in the primary pipeline 30.

[0066] In this embodiment, a heat source pipeline 20 is provided. The primary heat exchanger 71 includes a third heat exchange channel and a fourth heat exchange channel that exchange heat with each other. When the heating system 100 operates, the heat source 10 transfers heat to the primary pipeline 30 through the heat source pipeline 20 and the primary heat exchanger 71. The fluid in the primary pipeline 30 flows through the fourth heat exchange channel and exchanges heat with the fluid in the third heat exchange channel, so that the heat in the heat source pipeline 20 is transferred into the primary pipeline 30, and then the primary pipeline 30 transfers heat to the heat user 101.

[0067] Setting the heat source pipeline 20 in this embodiment can well cooperate with the heat source 10 and the primary heat exchanger 71 to transfer heat into the primary pipeline 30, so as to meet the operation requirements of the heating system 100.

[0068] Next, reference will be made to Figure 1 to describe the heating system 100 according to a specific embodiment of the present invention.

[0069] As Figure 1 shown, the heating system 100 includes a heat source 10, a heat source pipeline 20, a primary heat exchanger 71, a primary pipeline 30, a secondary heat exchanger 72, a secondary pipeline 40, a first connection pipeline 61, a second connection pipeline 62, a third connection pipeline 63, a heater 73, a heat storage device 74, and a heat pump 50.

[0070] The heat source 10 can be a heat source factory. The heater 73 can be one or a combination of a boiler, a solar heater 73, a geothermal heater 73, and a gas heater 73. The fluid for heat transfer in the primary pipeline 30 is water. The heat source pipeline 20 exchanges heat with the primary pipeline 30 through a primary heat exchanger 71. The heat source pipeline 20 is connected to the heat source 10 to transfer the heat of the heat source 10 to the primary heat exchanger 71 for heat exchange with the fluid in the primary pipeline 30, so that the heat is transferred into the primary pipeline 30. The primary pipeline 30 exchanges heat with the secondary pipeline 40 through a secondary heat exchanger 72, so that the heat in the primary pipeline 30 is transferred into the secondary pipeline 40. The secondary pipeline 40 is connected to the heat user 101, thereby realizing heat supply to the heat user 101.

[0071] The primary heat exchanger 71 includes a third heat exchange channel and a fourth heat exchange channel. The secondary heat exchanger 72 includes a first heat exchange channel and a second heat exchange channel. The fourth heat exchange channel and the first heat exchange channel are both connected in series in the primary pipeline 30. The primary pipeline 30 includes a liquid supply pipe 31 and a liquid return pipe 32. The two ends of the liquid supply pipe 31 are respectively connected to the outlet of the fourth heat exchange channel and the inlet of the first heat exchange channel. The two ends of the liquid return pipe 32 are respectively connected to the inlet of the fourth heat exchange channel and the outlet of the first heat exchange channel. A sixth control valve 86 and a third water pump 77 are connected in series on the liquid supply pipe 31.

[0072] The heat pump 50 is a carbon dioxide water source heat pump. The evaporator 51 of the heat pump 50 has a first heat exchange flow channel 511. The condenser 52 of the heat pump 50 is an air cooler and has a second heat exchange flow channel 521. The first connection pipeline 61 includes a first flow channel pipe 611 and a second flow channel pipe 612. The first flow channel pipe 611 is connected to the outlet of the first heat exchange flow channel 511 and the inlet of the second heat exchange flow channel 521. The second flow channel pipe 612 is connected to the outlet of the second heat exchange flow channel 521 and the liquid supply pipe 31. A first control valve 81 and a first water pump 75 are connected in series on the first flow channel pipe 611. A heater 73, a heat storage device 74, and a second control valve 82 are connected in series on the second flow channel pipe 612. The second control valve 82 is located downstream of the heat storage device 74 in the fluid flow direction in the second flow channel pipe 612.

[0073] One end of the second connecting pipeline 62 is connected to the liquid return pipe 32, and the other end is connected to the inlet of the first heat exchange flow channel 511. A third control valve 83 is connected in series on the second connecting pipeline 62. The third connecting pipeline 63 is connected to the outlet of the first heat exchange flow channel 511 and the liquid return pipe 32. A fourth control valve 84 is provided on the third connecting pipeline 63. In the fluid flow direction in the liquid return pipe 32, the position where the second connecting pipeline 62 is connected to the liquid return pipe 32 is upstream of the position where the third connecting pipeline 63 is connected to the liquid return pipe 32. A fifth control valve 85 is provided on the liquid return pipe 32. The fifth control valve 85 is located downstream of the position where the second connecting pipeline 62 is connected to the liquid return pipe 32 and upstream of the position where the third connecting pipeline 63 is connected to the liquid return pipe 32.

[0074] A seventh control valve 87 and a fourth water pump 78 may also be provided on the secondary pipeline 40, which is convenient for adjusting and controlling the fluid flow rate in the secondary pipeline 40, so that the fluid can flow stably to the heat user 101 under the drive of the fourth water pump 78, so that the heating system 100 can supply heat to the heat user 101 stably.

[0075] When the heating system 100 is operating, the fluid in the primary pipeline 30 takes heat in the primary heat exchanger 71 and then flows along the supply pipe 31 to the secondary heat exchanger 72. The primary pipeline 30 exchanges heat with the secondary pipeline 40, so as to supply heat to the heat user 101.

[0076] In the primary pipeline 30, the temperature of the fluid after heat exchange in the secondary heat exchanger 72 decreases and flows along the liquid return pipe 32 to the primary heat exchanger 71. Among them, part of the fluid flows into the first heat exchange flow channel 511 along the second connecting pipeline 62. The temperature of the fluid is further reduced under the cooling action of the heat pump 50. For the low-temperature fluid flowing out of the first heat exchange flow channel 511, part of it flows back to the liquid return pipe 32 along the third connecting pipeline 63. The low-temperature fluid is mixed with the fluid in the liquid return pipe 32, so that the temperature of the fluid flowing to the primary heat exchanger 71 in the liquid return pipe 32 decreases, thereby increasing the temperature difference between the supply water and the return water in the primary pipeline 30 and well improving the heat transfer capacity of the primary pipeline 30.

[0077] The low-temperature fluid flowing out of the first heat exchange channel 511, another part flows along the first flow channel pipe 611 of the first connection pipeline 61 to the second heat exchange channel 521, and the heat pump 50 heats the fluid flowing into the second heat exchange channel 521 so that the fluid temperature can meet or approach the temperature requirement of the fluid when the supply pipe 31 transfers heat. The heated fluid can flow along the second flow channel pipe 612 and pass through the heater 73 for supplementary heating to stably and reliably meet the heating needs. Then, the fluid flows along the second flow channel pipe 612 to the supply pipe 31, and the fluid from the second flow channel pipe 612 is incorporated into the fluid in the supply pipe 31, increasing the fluid flow rate flowing to the secondary heat exchanger 72, so that the primary pipeline 30 can transfer more heat, and the heat transfer capacity of the primary pipeline 30 is further improved.

[0078] The heat pump 50 in this embodiment is a carbon dioxide heat pump 50. At the condenser 52 of the heat pump 50, the lower the temperature of the fluid flowing into the second heat exchange channel 521, the higher the energy efficiency of the heat pump 50, and the heat pump 50 can operate more efficiently and have a better heating effect on the fluid. In this embodiment, through the combined control of the first control valve 81, the third control valve 83, the fourth control valve 84, and the fifth control valve 85, when the heat pump 50 supplies the same amount of additional heat to the primary pipeline 30, the temperature of the fluid flowing out of the first heat exchange channel 511 can be maintained below a certain temperature value. Specifically, the temperature of the fluid flowing out of the first heat exchange channel 511 can be lower than 30 °C, so that the heat pump 50 can operate stably and efficiently, and to a certain extent, the operating cost of the heating system 100 can be reduced. Refer to Figure 1 As shown, when the heating system 100 operates, the flow rate of the fluid flowing along the second connection pipeline 62 to the first heat exchange channel 511 can be adjusted through the cooperation of the third control valve 83 and the fifth control valve 85, so that after the heat pump 50 operates, the temperature of the fluid flowing out of the first heat exchange channel 511 can be stably maintained at a temperature less than 30 °C.

[0079] In this embodiment, as Figure 1 shown, the flow rate and temperature of the fluid flowing into the first heat exchange channel 511 are respectively denoted as Q1 and T1, the temperature of the fluid flowing out of the first heat exchange channel 511 is denoted as T2, the flow rate of the fluid flowing into the second heat exchange channel 521 along the first connection pipeline 61 is denoted as Q2, the flow rate of the fluid flowing along the third connection pipeline 63 to the return pipe 32 is denoted as Q3, and the temperature of the fluid flowing out of the second heat exchange channel 521 is denoted as T3. Then, Q1, Q2, and Q3 can be controlled and adjusted according to the following formula. Q3 = Q1 - Q2, where the flow rate of the fluid refers to the mass flow rate. In this embodiment, the flow rate relationship between Q1, Q2, and Q3 can be used to adjust the fluid flow rate in each pipeline of the heating system 100, so that the fluid flow between each pipeline in the heating system 100 can maintain a stable and good flow state, and the heat pump 50 can be in the best operating conditions, enabling the heat pump 50 to operate stably and efficiently, so that the heating system 100 can operate more stably and reliably.

[0080] In the actual application and implementation process, the heating system 100 of this embodiment can refer to the construction and transformation of the primary pipeline 30, which has no impact on the secondary pipeline 40 related to the heat user 101, and can well reduce the interference to the heat user 101 during the actual construction and transformation process.

[0081] In this embodiment, by setting the primary pipeline 30 and the heat pump 50, the heat pump 50 heats a part of the fluid in the liquid return pipe 32 and supplements it into the liquid supply pipe 31, thereby effectively increasing the flow rate of the fluid supplying heat to the heat user 101 in the primary pipeline 30, and thus well increasing the heat supply amount of the heating system 100 to the heat user 101, improving the heat supply capacity of the heating system 100, so that the heating system 100 can better meet the heating needs of the heat user 101.

[0082] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0083] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0084] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0085] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0086] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A heating system, characterized in that: include: a primary heat exchanger (71), the primary heat exchanger (71) being used for heat exchange with a heat source (10); A primary pipeline (30), both ends of which are respectively connected to the primary heat exchanger (71), and the primary pipeline (30) comprises a liquid supply pipe (31) and a liquid return pipe (32); A heat pump (50), wherein the evaporator (51) of the heat pump (50) has a first heat exchange channel (511), the inlet of the first heat exchange channel (511) is connected to the return liquid pipe (32), the condenser (52) of the heat pump (50) has a second heat exchange channel (521), the inlet of the second heat exchange channel (521) is connected to the outlet of the first heat exchange channel (511), and the outlet of the second heat exchange channel (521) is connected to the supply liquid pipe (31), and the heat pump (50) is configured to absorb heat from the fluid in the return liquid pipe (32) and replenish the heated fluid into the supply liquid pipe (31).

2. The heating system according to claim 1, characterized in that: It also includes a first connecting pipeline (61), one end of which is connected to the outlet of the first heat exchange channel (511), the other end of which is connected to the liquid supply pipe (31), and the second heat exchange channel (521) is connected in series in the first connecting pipeline (61).

3. The heating system according to claim 2, characterized in that: The first connecting pipeline (61) comprises: a first flow channel pipe (611), the first flow channel pipe (611) being connected between the first heat exchange flow channel (511) and the second heat exchange flow channel (521), and a first water pump (75) and a first control valve (81) being connected in series to the first flow channel pipe (611); A second flow channel pipe (612), wherein the second flow channel pipe (612) is connected between the second heat exchange flow channel (521) and the liquid supply pipe (31).

4. The heating system according to claim 3, characterized in that: It also includes a heater (73), and the heater (73) is connected in series to the second flow channel tube (612).

5. The heating system according to claim 4, characterized in that: The invention also includes a heat reservoir (74), which is connected in series to the second flow channel pipe (612) and is located downstream of the heater (73) in the direction of fluid flow. A second control valve (82) is connected in series to the second flow channel pipe (612), and the second control valve (82) is located between the heat reservoir (74) and the liquid supply pipe (31).

6. The heating system according to claim 1, characterized in that: Also includes: A second connecting pipeline (62), one end of which is connected to the liquid return pipe (32) and the other end of which is connected to the inlet of the first heat exchange channel (511), and a third control valve (83) is connected in series to the second connecting pipeline (62).

7. The heating system according to claim 6, characterized in that: Also includes: A third connecting pipeline (63), one end of the third connecting pipeline (63) is connected to the outlet of the first heat exchange channel (511) and the other end is connected to the liquid return pipe (32), the other end of the third connecting pipeline (63) is located downstream of the second connecting pipeline (62) in the fluid flow direction in the liquid return pipe (32), and a second water pump (76) and a fourth control valve (84) are connected in series to the third connecting pipeline (63).

8. The heating system according to claim 1, characterized in that: The heat pump (50) is a carbon dioxide water source heat pump (50).

9. The heating system according to claim 1, characterized in that: Also includes: A secondary heat exchanger (72) and a secondary pipeline (40), wherein the secondary heat exchanger (72) comprises a first heat exchange channel and a second heat exchange channel for mutual heat exchange, wherein the first heat exchange channel is connected in series to the primary pipeline (30), and the second heat exchange channel is connected in series to the secondary pipeline (40), and the secondary pipeline (40) is used to supply heat to a heat user (101).

10. The heating system according to claim 1, characterized in that: It also includes a heat source pipeline (20), and the primary heat exchanger (71) includes a third heat exchange channel and a fourth heat exchange channel for mutual heat exchange, the third heat exchange channel is connected in series to the heat source pipeline (20), and the fourth heat exchange channel is connected in series to the primary pipeline (30).

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