Distributed circulating pump heat supply system

Abstract

The utility model provides a distributed circulating pump heat supply system, which belongs to the technical field of heat supply, and comprises a heat exchanger, and a heat supply module and a heat consumption module which are respectively connected with the heat exchanger, and further comprises a heat storage module communicated with the heat supply module, the heat supply module and the heat consumption module exchange heat in the heat exchanger, and the heat storage module is communicated with the heat supply module. The backflow end of the heat storage module communicates with the backflow end of the heat supply module to form a heat storage line, and the heat supply end of the heat storage module communicates with the heat supply end of the heat supply module to form a heat release line. The utility model provides a distributed circulating pump heat supply system and aims to solve the problems that heat energy generated by a thermal power plant cannot be stored in the prior art, so that heat energy is wasted when the heat demand is low, and heat energy is insufficient when the heat demand is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating, and more specifically, relates to a distributed circulating pump heating system. Background Art

[0002] Traditional centralized heating systems primarily rely on circulating pumps installed at the heat source to transport and distribute energy. The boiler's primary circulating water pump consumes a lot of electricity and generates high pressure during boiler operation, posing a safety hazard. Furthermore, the system suffers from hydraulic imbalance, which is typically addressed by adjusting the primary water valves at the thermal power station. However, this approach results in significant unnecessary energy consumption. As heating companies increase their heat loads and heating radius, power transmission and distribution energy consumption continues to rise, without significantly improving hydraulic function issues. Therefore, to ensure the safety and stability of centralized heating systems and achieve efficient energy conservation, it is necessary to adopt a distributed circulating pump heating system to address these issues.

[0003] Distributed circulating pump heating systems, by installing circulating pumps at user locations, reduce the head of the heat source circulating pump while enabling round-the-clock heating. This is not only energy-efficient and environmentally friendly, but also offers low operating and maintenance costs. However, as the weather changes, indoor temperatures and heat demand also fluctuate. When room temperatures are high, only a small amount of heat is needed to meet demand, and the excess heat generated by the thermal power plant cannot be reused, resulting in waste. When outdoor temperatures are low, user demand for heat increases, and the thermal power plant may not be able to meet the demand, resulting in substandard indoor temperatures and the need to generate additional heat to heat users, increasing energy consumption. Utility Model Content

[0004] The purpose of the utility model is to provide a distributed circulating pump heating system, which aims to solve the problem in the prior art that the heat energy generated by the thermal power plant cannot be stored, resulting in heat energy waste when the heat demand is low and insufficient heat energy when the heat demand increases.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] Provided is a distributed circulating pump heating system, comprising a heat exchanger, a heating module and a heat using module respectively connected to the heat exchanger, and a heat storage module connected to the heating module, wherein the heating module and the heat using module perform heat exchange within the heat exchanger, the heat storage module and the heat supply module are connected at their return ends to form a heat storage circuit, and the heat storage module and the heat supply module are connected at their heat supply ends to form a heat release circuit;

[0007] The heating module includes a heat source, a heating pipe connected to the heat source at both ends, and a switching valve provided on the heating pipe, wherein the switching valve is used to control the conduction or blocking of the heating pipe and the heat storage module;

[0008] The heat module includes a main pipe and a plurality of branch pipes connected in parallel to the main pipe, the main pipe and the branch pipes are respectively provided with a first circulation pump, and the main pipe is also provided with a first temperature detector;

[0009] The heat storage module includes a heat storage pipe connected to the heat supply pipe, a heat storage tank and a second circulation pump arranged on the heat storage pipe.

[0010] In a possible implementation, the distributed circulating pump heating system further includes a controller, and the first temperature detector and the switching valve are respectively communicatively connected to the controller.

[0011] In a possible implementation, the heat storage box includes a box body and a heat storage medium filled in the box body, and the heat storage pipe has a heat storage area located in the box body.

[0012] In a possible implementation, the heat storage area is distributed in a spiral shape with the vertical direction as the axis.

[0013] In a possible implementation, the box body includes an inner box wall and an outer box wall arranged outside the inner box wall, and also includes a heat-insulating layer filled between the inner box wall and the outer box wall.

[0014] In one possible implementation, the distributed circulation pump heating system also includes a water replenishment module connected to the main pipe, the water replenishment module includes a water replenishment pipe connected to the main pipe and a water storage tank connected to the water replenishment pipe, and a third circulation pump provided on the water replenishment pipe.

[0015] In a possible implementation, a liquid level detector is further provided on the main pipe, and the liquid level detector and the third circulating pump are respectively communicatively connected to the controller.

[0016] In a possible implementation, the branch pipe is further provided with a flow detector, a regulating valve, and a second temperature detector, and the flow detector, the second temperature detector, and the regulating valve are respectively communicatively connected to the controller.

[0017] In a possible implementation, a plurality of heat storage tanks are provided, the plurality of heat storage tanks are connected in parallel to the heat storage pipe, and the second circulation pumps are provided in a one-to-one correspondence with the heat storage tanks.

[0018] In a possible implementation, the heat storage module further includes a third temperature detector provided in the heat storage tank, and the third temperature detector and the second circulation pump are respectively communicatively connected to the controller.

[0019] The beneficial effect of the distributed circulating pump heating system provided by the present invention is that, compared with the prior art, the first ventilation zone and the second ventilation zone of the distributed circulating pump heating system of the present invention perform heat exchange in the ventilator, thereby increasing the temperature of the medium in the heat module and providing heat to the user. Since the main pipe and branch pipe of the heat module are both provided with a first circulating pump, not only can the flow of the medium in the main pipe be adjusted, but the user can also adjust the flow of the medium in each branch pipe according to his or her own needs, thereby regulating the indoor temperature, which is more convenient. Moreover, the first circulating pumps are respectively provided on the main pipe and the branch pipe. Compared with providing the first circulating pump alone on the main pipe, the head and power of the first circulating pump on the main pipe can be reduced, which is energy-saving and environmentally friendly. In addition, the present invention is also provided with a heat storage circuit. When the user's heat demand is relatively small, part of the heat in the heating module is exchanged with the heat module, and the other part enters the heat storage circuit and stores heat energy through the heat storage tank. When the user's heat demand increases, the heat in the heating module is only exchanged with the user's circulation circuit, and no longer supplied to the heat storage circuit. If the heat in the heating module still cannot meet the heat demand at this time, the heat storage circuit is activated to supply the heat stored in the heat storage tank to the heating module, increasing the heat in the heating module and increasing the heat energy of the heat module after heat exchange. This utility model avoids the waste of heat energy by setting up a heat storage circuit to store excess heat. At the same time, it can also release the stored heat after the heat demand increases, ensuring that the heat meets the heat demand without the need to generate additional heat, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a distributed circulating pump heating system provided by an embodiment of the present utility model;

[0022] Figure 2 This is a schematic structural diagram of the heat storage tank used in the embodiment of the present utility model;

[0023] Figure 3 This is a schematic structural diagram of a heat storage module used in another embodiment of the present invention.

[0024] In the figure: 1. Heating module; 101. Switching valve; 102. Heating pipe; 2. Heat storage module; 201. Heat storage tank; 2011. Tank body; 2012. Heat storage medium; 202. Second circulation pump; 203. Heat storage pipe; 2031. Heat storage area; 3. Heat using module; 301. Main pipe; 302. Branch pipe; 303. First circulation pump; 304. First temperature detector; 305. Control valve; 4. Water supply module; 401. Water storage tank; 402. Third circulation pump; 403. Water supply pipe; 5. Heat exchanger. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the claims, specification, and drawings of the present invention, unless otherwise expressly defined, terms such as "first," "second," or "third" are used to distinguish between different objects, rather than to describe a specific order. Unless otherwise specified, other directional words such as "vertical," "clockwise," and "counterclockwise" are used to indicate directions or positional relationships based on the directions and positional relationships shown in the drawings, and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or component referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention. In the claims, specification, and drawings of the present invention, unless otherwise expressly defined, terms such as "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without a displacement relationship or relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, integral connection, and fixed connection through other devices or components. In the claims, specification, and drawings of the present invention, terms such as "including," "having," and their variations are intended to mean "including but not limited to."

[0027] Please also refer to Figures 1 to 3 The distributed circulating pump heating system provided by the present invention is now described. The distributed circulating pump heating system includes a heat exchanger 5, a heating module 1 and a heat using module 3 respectively connected to the heat exchanger 5, and a heat storage module 2 connected to the heating module 1. The heating module 1 and the heat using module 3 perform heat exchange within the heat exchanger 5. The return end of the heat storage module 2 is connected to the heat supply module 1 to form a heat storage circuit, and the heat storage module 2 is connected to the heat supply end of the heat supply module 1 to form a heat release circuit.

[0028] The heating module 1 includes a heat source, a heating pipe 102 connected to the heat source at both ends, and a switching valve 101 provided on the heating pipe 102. The switching valve 101 is used to control whether the heating pipe 102 is connected to the heat storage module 2 or not.

[0029] The heat module 3 includes a main pipe 301 and a plurality of branch pipes 302 connected in parallel to the main pipe 301. The main pipe 301 and the branch pipes 302 are respectively provided with a first circulation pump 303, and the main pipe 301 is also provided with a first temperature detector 304.

[0030] The heat storage module 2 includes a heat storage pipe 203 connected to the heat supply pipe 102 , and a heat storage tank 201 and a second circulation pump 202 provided on the heat storage pipe 203 .

[0031] Compared with the prior art, the distributed circulating pump heating system provided by the present invention has a heat exchanger 5 in which the heating pipe 102 and the main pipe 301 of the present invention perform heat exchange, thereby increasing the temperature of the medium in the main pipe 301. The heated medium flows into the branch pipe 302 to provide heat to the user. Since both the main pipe 301 and the branch pipe 302 of the heat module 3 are provided with a first circulating pump 303, not only can the flow rate of the medium in the main pipe 301 be adjusted, but the user can also adjust the flow rate of the medium in the branch pipe 302 according to their own needs, thereby regulating the indoor temperature and making temperature control more convenient. Moreover, the first circulating pump 303 is respectively provided on the main pipe 301 and the branch pipe 302. Compared with providing the first circulating pump 303 alone on the main pipe 301, the head and power of the first circulating pump 303 on the main pipe 301 can be reduced, which is energy-saving and environmentally friendly. In addition, the present invention also provides a heat storage circuit. When the user's heat demand is low, the heating module 1 and the heat storage module 2 form a heat storage circuit. Part of the heat in the heating module 1 is exchanged with the heat-using module 3, and the remaining heat enters the heat storage tank 201 for storage. The medium then flows along the heat storage pipe 203 to the return end of the heat supply pipe 102. When the user's heat demand increases, the switching valve 101 controls the separation between the heating module 1 and the heat storage module 2, and the heat in the heating module 1 is exchanged only with the heat-using module 3. If the heat in the heating module 1 still cannot meet the heat demand, the switching valve 101 connects the heating module 1 and the heat storage module 2, and activates the heat release circuit. The medium in the heat supply pipe 102 enters the heat storage tank 201, and its thermal energy increases. The medium then flows along the heat storage pipe 203 to the heat supply end of the heat supply pipe 102, increasing the heat in the medium in the heat supply pipe 102 and increasing the heat energy of the heat-using module 3 after heat exchange. The utility model stores excess heat by setting up a heat storage module 2, thereby avoiding waste of thermal energy. At the same time, the stored heat can be released after the heat demand increases, ensuring that the heat meets the heat demand without the need to generate additional heat, thereby reducing energy consumption.

[0032] It should be noted that a medium flows through the heat supply pipe 102 in the heat supply module 1 and the main pipe 301 and the branch pipe 302 in the heat utilization module 3. The medium may be liquid or gas, preferably water.

[0033] Optionally, the heat storage module 2 switches between the heat storage circuit and the heat release circuit by means of a switching valve. For example, the heat storage pipe 203 includes a liquid inlet pipe and a liquid outlet pipe, and the liquid outlet pipe has at least two branches, one of which is connected to the return end of the heat supply pipe 102, and the other is connected to the heat supply end of the heat supply pipe 102. The valve controls the connection between the branches and the return end or the heat supply end.

[0034] In some embodiments, see Figure 1 The distributed circulating pump heating system further includes a controller, and the first temperature detector 304 and the switching valve 101 are respectively communicatively connected to the controller.

[0035] The first temperature detector 304 detects the temperature of the medium in the main pipe 301. When the medium temperature is detected to be below a first preset temperature, a heating signal is generated. Based on the heating signal, the controller controls the switching valve 101 to prevent the medium in the heat supply circuit from flowing to the heat storage pipe 203, exchanging heat only with the heat-consuming module 3. When the medium temperature is detected to be below a second preset temperature, a heat release signal is generated. Based on the heat release signal, the controller controls the switching valve 101 to connect the heat supply module 1 with the heat storage module 2 and open the heat release circuit. Heat storage module 2 and heat supply module 1 jointly supply heat to the heat-consuming module 3. When the medium temperature is detected to be above a third preset temperature, a heat storage signal is generated. Based on the heat storage signal, the controller controls the switching valve 101 to connect the heat supply module 1 with the heat storage module 2 and open the heat storage circuit. This embodiment automatically controls the switching valve 101 based on the detection results of the second temperature detector to determine whether the heat supply module 1 is connected to the heat storage module 2. When the heat supply module 1 and the heat storage module 2 are connected, the controller controls whether the liquid storage module is in a heat release or heat storage state.

[0036] In some embodiments, see Figure 2 The heat storage box 201 includes a box body 2011 and a heat storage medium 2012 filled in the box body 2011 , and the heat storage pipe 203 has a heat storage area 2031 located in the box body 2011 .

[0037] After the medium flows into the heat storage tank 201 along the heat storage pipe 203, the heat storage medium 2012 exchanges heat with the medium, which can store heat energy and avoid heat energy waste.

[0038] Optionally, the heat storage medium 2012 is a low-temperature phase change material, which can be water, steam mineral oil or molten salt. The molten salt can be mineral oil molten salt or quartzite.

[0039] Optionally, the heat storage area 2031 includes a first heat storage portion distributed transversely and a second heat storage portion distributed longitudinally. Both the first heat storage portion and the second heat storage portion are interconnected in an "S" configuration. This embodiment increases the distribution area of ​​the heat storage area 2031 within the heat storage tank 201, prolonging the flow time of the medium within the heat storage tank 201 and enabling sufficient heat exchange between the medium and the heat storage medium 2012.

[0040] In some embodiments, not shown in the figure, the heat storage area 2031 is distributed in a spiral shape with the vertical direction as the axis.

[0041] The solution in this embodiment increases the distribution area of ​​heat storage area 2031 within heat storage tank 201, prolonging the flow path and time of the medium within heat storage tank 201, thereby enabling sufficient heat exchange between the medium and heat storage medium 2012. In addition, the spiral distribution eliminates dead corners during medium flow, making the flow smoother.

[0042] In some embodiments, see Figure 2 The box body 2011 includes an inner box wall and an outer box wall arranged outside the inner box wall, and also includes an insulation layer filled between the inner box wall and the outer box wall.

[0043] The thermal insulation layer can keep the heat storage medium 2012 in the heat storage box 201 warm, thereby preventing the heat storage medium 2012 from exchanging heat with the outside air and causing heat loss.

[0044] Optionally, the retaining layer may be a lightweight thermal insulation material with a low thermal conductivity, such as thermal insulation cotton or pearl cotton, or may be glass wool felt.

[0045] In some embodiments, see Figure 1 The distributed circulating pump heating system also includes a water replenishment module 4 connected to the main pipe 301, the water replenishment module 4 includes a water replenishment pipe 403 connected to the main pipe 301 and a water storage tank 401 connected to the water replenishment pipe 403, and a third circulating pump 402 provided on the water replenishment pipe 403.

[0046] With long-term use of the heat module 3, the medium therein will be lost due to vaporization and other reasons. Therefore, water flow in the water tank 401 is made to flow into the main pipe 301 along the water supply pipe 403 through the third circulation pump 402 to achieve water replenishment, ensuring normal heat use for users.

[0047] In some embodiments, see Figure 1 A liquid level detector is also provided on the main pipe 301. The liquid level detector and the third circulating pump 402 are respectively connected to the controller for communication.

[0048] When the liquid level detector detects that the liquid level in the main pipe 301 is lower than a first preset liquid level, it generates a refill signal. Based on the refill signal, the controller controls the third circulation pump 402 to start, injecting water from the water tank 401 into the main pipe 301 through the water replenishment pipe 403. When the liquid level detector detects that the liquid level in the main pipe 301 is higher than a second preset liquid level, it generates a stop signal. Based on the stop signal, the controller controls the third circulation pump 402 to stop injecting water into the main pipe 301, thereby preventing safety hazards caused by excessively high liquid levels.

[0049] Specifically, the controller can be set up separately, or it can be a built-in controller in the heating system.

[0050] In some embodiments, see Figure 1 The branch pipe 302 is also provided with a flow detector, a regulating valve 305 and a second temperature detector. The flow detector, the second temperature detector and the regulating valve 305 are respectively connected to the controller for communication.

[0051] The flow detector can detect the flow of the medium in branch pipe 302, and the second temperature detector detects the temperature of branch pipe 302. When the second temperature detector detects that the temperature of branch pipe 302 is higher than the fourth preset temperature, it generates a cooling signal, and the controller controls the regulating valve 305 to close according to the cooling signal. When the flow rate detected by the flow detector reaches the first preset value, it generates a stop signal, and the controller controls the regulating valve 305 to stop closing according to the stop signal. Conversely, when the second temperature detector detects that the temperature is lower than the fifth preset temperature, the controller controls the regulating valve 305 to open according to the corresponding signal. Because the change in medium temperature requires a certain amount of time, stopping the closing or opening of the regulating valve 305 when the temperature reaches the specified value is likely to produce hysteresis, making the final indoor temperature difficult to control. Therefore, it is more accurate to determine whether to stop regulating the regulating valve 305 by detecting the flow rate of the medium through the flow detector.

[0052] In some embodiments, see Figure 3 There are multiple heat storage tanks 201, and the multiple heat storage tanks 201 are connected in parallel to the heat storage pipe 203, and the second circulation pump 202 is set in a one-to-one correspondence with the heat storage tank 201.

[0053] In this embodiment, multiple heat storage tanks 201 are connected in parallel to more fully store excess heat, avoiding heat waste. Furthermore, when the heat release circuit is activated, sufficient heat is exchanged with the heat-using module 3, ensuring that the user's heating needs are met. Each heat storage tank 201 is provided with a corresponding second circulating pump 202, which controls the activation of the corresponding heat storage tank 201 based on the amount of heat required. Alternatively, when insufficient heat is supplied, a corresponding number of heat storage tanks 201 can be controlled to release heat.

[0054] In some embodiments, see Figure 3The heat storage module 2 further includes a third temperature detector provided in the heat storage tank 201 , and the third temperature detector and the second circulation pump 202 are respectively communicatively connected to the controller.

[0055] The third temperature detector is used to detect the temperature within the heat storage tank 201. When the temperature within the heat storage tank 201 exceeds the first heat storage value, a first signal is generated. Based on the first signal, the controller controls the second circulation pump 202 to shut down. No more medium flows into the corresponding heat storage tank 201. The medium in the heat supply pipe 102 flows along the heat storage pipe 203 into the other heat storage tanks 201, which continue to store heat. This embodiment can improve heat storage efficiency by concentrating the medium into the heat storage tank 201 with sufficient heat storage capacity.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Distributed circulating pump heating system, characterized in that: The heat exchanger comprises a heat exchanger, a heat supply module and a heat using module respectively connected to the heat exchanger, and a heat storage module connected to the heat supply module, wherein the heat supply module and the heat using module perform heat exchange in the heat exchanger, the return end of the heat storage module is connected to the heat supply module to form a heat storage circuit, and the heat storage module is connected to the heat supply end of the heat supply module to form a heat release circuit; The heating module includes a heat source, a heating pipe connected to the heat source at both ends, and a switching valve provided on the heating pipe, wherein the switching valve is used to control the conduction or blocking of the heating pipe and the heat storage module; The heat module includes a main pipe and a plurality of branch pipes connected in parallel to the main pipe, the main pipe and the branch pipes are respectively provided with a first circulation pump, and the main pipe is also provided with a first temperature detector; The heat storage module includes a heat storage pipe connected to the heat supply pipe, a heat storage tank and a second circulation pump arranged on the heat storage pipe.

2. The distributed circulating pump heating system according to claim 1, characterized in that: The distributed circulating pump heating system further includes a controller, and the first temperature detector and the switching valve are respectively communicatively connected to the controller.

3. The distributed circulating pump heating system according to claim 1, characterized in that: The heat storage box includes a box body and a heat storage medium filled in the box body, and the heat storage pipe has a heat storage area located in the box body.

4. The distributed circulating pump heating system according to claim 3, characterized in that: The heat storage area is distributed in a spiral shape with the up-down direction as the axis.

5. The distributed circulating pump heating system according to claim 3, characterized in that: The box body includes an inner box wall and an outer box wall arranged outside the inner box wall, and also includes a heat insulation layer filled between the inner box wall and the outer box wall.

6. The distributed circulating pump heating system according to claim 1, characterized in that: The distributed circulation pump heating system also includes a water replenishment module connected to the main pipe, the water replenishment module includes a water replenishment pipe connected to the main pipe and a water storage tank connected to the water replenishment pipe, and a third circulation pump provided on the water replenishment pipe.

7. The distributed circulating pump heating system according to claim 6, characterized in that: The main pipe is further provided with a liquid level detector, and the liquid level detector and the third circulating pump are respectively connected to the controller for communication.

8. The distributed circulating pump heating system according to claim 6, characterized in that: The branch pipe is further provided with a flow detector, a regulating valve and a second temperature detector. The flow detector, the second temperature detector and the regulating valve are respectively connected to the controller for communication.

9. The distributed circulating pump heating system according to claim 3, characterized in that: There are multiple heat storage tanks, which are connected in parallel to the heat storage pipe, and the second circulation pumps are arranged in a one-to-one correspondence with the heat storage tanks.

10. The distributed circulating pump heating system according to claim 9, characterized in that: The heat storage module further includes a third temperature detector provided in the heat storage tank, and the third temperature detector and the second circulation pump are respectively communicatively connected to the controller.

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