A heat pump zoning control system with buffer tank

Abstract

The utility model discloses a kind of heat pump zoning control system with buffer water tank, including buffer water tank, heat exchange module, first heat supply module, second heat supply module, hydraulic circulation module and control module. Buffer water tank is arranged longitudinally, its inside forms upper temperature zone and lower temperature zone, is respectively equipped with temperature acquisition module;Heat exchange module includes refrigerant side interface and water side interface, refrigerant side interface is connected heat pump by refrigerant pipeline, and water side interface is connected the upper portion and lower portion of buffer water tank;The water inlet of first heat supply module is connected with the uppermost portion of buffer water tank, and the backwater port is connected with the second upper portion;The water inlet of second heat supply module is connected with the second lower portion, and the backwater port is connected with the lowermost portion;Hydraulic circulation module is arranged between heat exchange module and buffer water tank, for driving system water flow circulation;Control module is used to adjust the working condition of two heat supply modules, realizes multi-zone, on-demand, efficient heat supply control strategy, improves system stability and energy efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of heat pump heating systems, and in particular to a heat pump zone control system with a buffer water tank. Background Technology

[0002] With the widespread application of heat pump technology, heat pump heating systems have gradually entered residential and commercial building scenarios. In actual use environments where multiple terminal devices coexist, common terminal devices include radiators, fan coil units, and floor radiant heating systems. These different types of terminal devices have significantly different requirements for water supply temperature. Generally, radiators require higher water temperatures, fan coil units require lower temperatures, while floor heating is suitable for lower temperature water supply.

[0003] In practical applications, users often configure two or more types of terminal devices in the same system simultaneously and expect them to operate concurrently. However, traditional heat pump systems generally use a uniform water temperature supply method, which often requires setting the outlet water temperature to the temperature required by the device with the highest demand, and then lowering the water temperature supplied to other devices through a mixing valve. This approach has several shortcomings, such as: Complex control: The system requires multiple mixing devices, resulting in complex piping layout and high installation and maintenance costs; Increased energy consumption: In order to meet the high-temperature requirements of the equipment, the heat pump needs to continuously output high-temperature hot water, which leads to a significant increase in the overall energy consumption of the system. Poor comfort: Delayed mixing response may cause fluctuations in water supply to low-temperature equipment, affecting user experience; System adjustment lag: The lack of an effective temperature difference control mechanism makes it difficult to make intelligent adjustments based on the dynamic needs of each zone.

[0004] Therefore, existing heat pump systems lack a zoned heating solution that is structurally sound, easy to control, energy-efficient, and quick to respond when faced with multiple zones, temperature zones, and different types of terminals. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a heat pump zoning control system with buffer water tank that has a fast control team and rapid response.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A heat pump zone control system with a buffer water tank includes: a buffer water tank, a heat exchange module, a first heating module, a second heating module, a hydraulic circulation module, and a control module. The buffer water tank is a longitudinally arranged container, forming an upper temperature zone and a lower temperature zone, each equipped with an upper temperature acquisition module and a lower temperature acquisition module. The heat exchange module includes a water-side heat exchange interface and a refrigerant-side heat exchange interface. The refrigerant-side heat exchange interface is connected to the heat pump via a refrigerant pipeline, and the water-side heat exchange interface is connected to the upper and lower parts of the buffer water tank. The first heating module... The inlet of the first heating module is connected to the top of the buffer tank, and the outlet is connected to the second-upper part of the buffer tank. The inlet of the second heating module is connected to the second-lower part of the buffer tank, and the outlet is connected to the bottom of the buffer tank. The hydraulic circulation module is located between the heat exchange module and the buffer tank to drive the system water circulation. The control module is connected to the buffer tank, the heat exchange module, the first heating module, and the second heating module to control the working status of the first heating module and the second heating module and maintain the water temperature difference at different heights of the buffer tank.

[0007] Furthermore, the first heating module includes a first water pump and a first indoor unit. The first water pump is located between the uppermost part of the buffer water tank and the first indoor unit, and the return water port of the first indoor unit is connected to the next upper part of the buffer water tank.

[0008] Furthermore, the second heating module includes a second water pump and a second indoor unit. The second water pump is located between the lower part of the buffer water tank and the second indoor unit, and the return water port of the second indoor unit is connected to the bottom of the buffer water tank.

[0009] Furthermore, two-way valves are installed in the water inlet and return pipes of both the first and second indoor units.

[0010] Furthermore, the water inlet side of the heat exchange module is connected to the upper and lower parts of the buffer water tank through a three-way valve, which has a switchable passage to adjust the water inlet height.

[0011] Furthermore, the hydraulic circulation module includes a third water pump and a filter. The third water pump is located between the heat exchange module and the three-way valve, and the filter is located on the pipeline between the third water pump and the three-way valve.

[0012] Furthermore, an exhaust valve is provided on the top of the buffer tank to release the gas accumulated inside the buffer tank.

[0013] Furthermore, a water supply pipe is installed at the bottom of the buffer tank, and a water supply valve is installed on the water supply pipe.

[0014] The aforementioned heat pump zone control system with buffer water tanks employs a combination of upper and lower zoned buffer water tanks, multi-point temperature acquisition, and independent heating loops. The control module adjusts the temperature difference between different height zones, effectively solving the problems of complex control of multiple types of terminal equipment, increased energy consumption, poor comfort, and system response lag caused by uniform water temperature heating in existing systems. This system eliminates the need for traditional mixing valve structures, achieving parallel heating and dynamic management across multiple temperature zones. It significantly improves structural rationality, energy efficiency, and control precision, meeting the practical needs of coordinated operation of multi-zone, multi-temperature-zone terminal equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the heat pump zoning control system provided by this utility model. Detailed Implementation

[0016] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] like Figure 1 As shown, this application provides a heat pump zone control system with a buffer water tank, including: a buffer water tank 1, a heat exchange module 2, a first heating module 3, a second heating module 4, a water circulation module 5, and a control module.

[0018] Specifically, the buffer water tank 1 is a longitudinally arranged container, with an upper temperature zone and a lower temperature zone inside, respectively equipped with an upper temperature acquisition module 11 and a lower temperature acquisition module 12; the heat exchange module 2 includes a water-side heat exchange interface and a refrigerant-side heat exchange interface, the refrigerant-side heat exchange interface is connected to a heat pump through a refrigerant pipeline, and the water-side heat exchange interface is connected to the upper and lower parts of the buffer water tank 1 respectively; the water-side heat exchange structure is equipped with an inlet water temperature sensor and an outlet water temperature sensor to detect the inlet and outlet water temperatures; the inlet of the first heating module 3 is connected to the buffer water tank. The uppermost part of the buffer tank 1 has a return water inlet connected to the second uppermost part of the buffer tank 1; the inlet of the second heating module 4 is connected to the second lowermost part of the buffer tank 1, and the return water inlet is connected to the lowest part of the buffer tank 1; the hydraulic circulation module 5 is located between the heat exchange module 2 and the buffer tank 1 to drive the system water flow circulation; the control module is connected to the buffer tank 1, the heat exchange module 2, the first heating module 3 and the second heating module 4 respectively to control the working status of the first heating module 3 and the second heating module 4 and maintain the water temperature difference at different height positions of the buffer tank 1.

[0019] This utility model provides a heat pump zoning control system with a buffer water tank. Addressing the practical problem of multiple terminal devices (such as radiators, fan coil units, and floor radiant heating) coexisting in the same system and having significantly different water supply temperature requirements, it proposes a solution for multi-temperature zone heating through temperature stratification and zoning control. This system achieves natural temperature stratification through a vertically arranged buffer water tank 1, eliminating the need for multiple mixing devices to achieve multi-temperature zone heating, thereby significantly simplifying pipeline layout and reducing installation and maintenance costs.

[0020] The system utilizes independently controlled first heating module 3 and second heating module 4, respectively corresponding to terminal devices with different temperature requirements. Simultaneously, it works in conjunction with upper and lower temperature zone acquisition modules, and dynamically adjusts the temperature through the control module. This effectively solves problems such as high energy consumption, complex control, and slow response under a unified high-temperature water supply mode. Compared to traditional solutions, the system has significant advantages in terms of more rational structure, clearer control logic, and higher operational efficiency. It also enables on-demand temperature adjustment for each zone, improving the overall comfort and stability of the system.

[0021] In addition, the system of this utility model has a fast response speed, can reflect the water temperature changes in each temperature zone in real time, quickly adjust the heating status, avoid the problem of water supply temperature fluctuation, and is particularly suitable for complex heating scenarios in modern homes and commercial buildings where multiple types of terminal equipment coexist, significantly improving user experience and system operating efficiency.

[0022] The first heating module 3 includes a first water pump 31 and a first indoor unit 32. The first water pump 31 is located between the top of the buffer water tank 1 and the first indoor unit 32, and the return water inlet of the first indoor unit 32 is connected to the second-highest part of the buffer water tank 1. This structure, by placing the first water pump 31 between the top of the buffer water tank 1 and the first indoor unit 32, ensures the timely supply of high-temperature water, avoids heat loss caused by intermediate water mixing or temperature differences, and effectively improves heating efficiency. At the same time, the return water inlet is located in the second-highest part, ensuring the stability of the temperature layer within the system, preventing the hot water layer from being damaged, maintaining the temperature gradient structure of the buffer water tank 1, and further improving the accuracy of zone control. The overall system structure is simple, easy to arrange, and beneficial for later installation and maintenance.

[0023] The second heating module 4 includes a second water pump 41 and a second indoor unit 42. The second water pump 41 is located between the lower part of the buffer water tank 1 and the second indoor unit 42. The return water inlet of the second indoor unit 42 is connected to the bottom of the buffer water tank 1. This design allows the second heating module 4 to operate independently in the low-temperature heating zone, avoiding sharing the water supply path with high-temperature equipment, ensuring that the low-temperature terminal equipment operates under stable temperature difference conditions, reducing the need for mixing and adjustment, and improving the simplicity and efficiency of system control. By placing the return water inlet at the bottom of the buffer water tank 1, the stability of the temperature layer structure is enhanced, maintaining the temperature uniformity of the lower temperature zone and effectively preventing temperature drift caused by hot water agitation. In addition, the short heating circulation path and fast response speed are beneficial to improving the temperature control sensitivity and indoor comfort of the underfloor heating system.

[0024] Two-way valves 6 are installed in both the inlet and outlet water pipes of the first indoor unit 32 and the second indoor unit 42. The two-way valves 6 enable the second heating module 4 to have independent start / stop capabilities, enhancing the independence and flexibility of zone control. Compared to the traditional method of using three-way valves 7 for proportional adjustment, the two-way valve 6 has a simpler structure, more direct control, lower cost, and faster response time, contributing to improved system operating efficiency and energy savings.

[0025] The inlet side of heat exchange module 2 is connected to the upper and lower parts of buffer tank 1 via a three-way valve 7. The three-way valve 7 has a switchable path to adjust the inlet water height. By introducing the three-way valve 7 with a path switching function, heat exchange module 2 becomes adjustable in terms of water supply height selection, effectively solving the problems of insufficient heat stratification or inaccurate zone temperature control. This design avoids the agitation and mixing that may result from hot water always being injected at the same height, maintaining a good temperature difference layer structure inside the tank, which helps improve the stability and response efficiency of the system's zone temperature control. Compared to a fixed connection method, this solution improves the adaptability and adjustment flexibility of system operation while maintaining a simple structure, making it suitable for dynamic heat load adjustment needs in different usage scenarios.

[0026] The hydraulic circulation module 5 includes a third water pump 51 and a filter 52. The third water pump 51 is located between the heat exchange module 2 and the three-way valve 7, and the filter 52 is located on the pipeline between the third water pump 51 and the three-way valve 7. By installing the filter 52 in the hydraulic circulation module 5, the operational reliability and long-term stability of the system are effectively enhanced. The filter 52 can remove impurities from the water before circulation begins, extending the service life of key components such as the water pump and heat exchanger, and reducing maintenance workload caused by pipeline blockage. Arranging the third water pump 51 between the heat exchange module 2 and the three-way valve 7 helps to form effective pressure drive before heat transfer, improves hot water delivery efficiency, and ensures that hot water can be injected into different temperature zones of the buffer tank 1 as needed.

[0027] A vent valve 8 is installed at the top of the buffer tank 1 to release the gas accumulated inside the tank. This venting structure is simple in design but highly functional, effectively solving problems such as circulation interruption, decreased heat exchange efficiency, and pump idling caused by gas accumulation. By releasing gas in a timely manner, the stability of the medium in the tank is ensured, improving the overall operating efficiency and safety of the system.

[0028] The buffer tank 1 has a water supply pipe at the bottom, and a water supply valve 9 is installed on the water supply pipe. This structure enables the system to replenish water autonomously, effectively preventing malfunctions such as poor circulation, reduced heat exchange efficiency, or pump idling caused by insufficient water volume, thus improving the continuity and reliability of system operation. Bottom water supply helps maintain the stability of the internal temperature distribution structure of the buffer tank 1, preventing disruption of temperature distribution due to top water injection.

[0029] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A heat pump zone control system with a buffer water tank, characterized in that, include: The buffer water tank (1) is a container arranged longitudinally, and its interior forms an upper temperature zone and a lower temperature zone, which are respectively provided with an upper temperature acquisition module (11) and a lower temperature acquisition module (12). The heat exchange module (2) includes a water-side heat exchange interface and a refrigerant-side heat exchange interface. The refrigerant-side heat exchange interface is connected to the heat pump through a refrigerant pipeline. The water-side heat exchange interface is connected to the upper and lower parts of the buffer water tank (1) respectively. The first heating module (3) has its inlet connected to the uppermost part of the buffer water tank (1) and its outlet connected to the next uppermost part of the buffer water tank (1). The second heating module (4) has its inlet connected to the lower part of the buffer water tank (1) and its outlet connected to the bottom part of the buffer water tank (1). A hydraulic circulation module (5) is disposed between the heat exchange module (2) and the buffer tank (1) to drive the system water flow circulation; The control module is connected to the buffer water tank (1), the heat exchange module (2), the first heating module (3) and the second heating module (4) respectively, so as to control the working status of the first heating module (3) and the second heating module (4) and maintain the water temperature difference at different height positions of the buffer water tank (1).

2. The heat pump zone control system with buffer water tank as described in claim 1, characterized in that, The first heating module (3) includes a first water pump (31) and a first indoor unit (32). The first water pump (31) is located between the uppermost part of the buffer water tank (1) and the first indoor unit (32). The return water port of the first indoor unit (32) is connected to the upper part of the buffer water tank (1).

3. The heat pump zone control system with buffer water tank as described in claim 2, characterized in that, The second heating module (4) includes a second water pump (41) and a second indoor unit (42). The second water pump (41) is located between the lower part of the buffer water tank (1) and the second indoor unit (42). The return water port of the second indoor unit (42) is connected to the bottom of the buffer water tank (1).

4. The heat pump zone control system with buffer water tank as described in claim 3, characterized in that, Two-way valves (6) are provided in the water inlet pipes and water return pipes of the first indoor unit (32) and the second indoor unit (42).

5. The heat pump zone control system with buffer water tank as described in claim 1, characterized in that, The water inlet side of the heat exchange module (2) is connected to the upper and lower parts of the buffer water tank (1) respectively through a three-way valve (7). The three-way valve (7) has a switchable passage to adjust the water inlet height.

6. The heat pump zone control system with buffer water tank as described in claim 5, characterized in that, The hydraulic circulation module (5) includes a third water pump (51) and a filter (52). The third water pump (51) is located between the heat exchange module (2) and the three-way valve (7), and the filter (52) is located on the pipeline between the third water pump (51) and the three-way valve (7).

7. The heat pump zone control system with buffer water tank as described in claim 1, characterized in that, The buffer tank (1) is equipped with an exhaust valve (8) on top, which is used to release the gas accumulated in the buffer tank (1).

8. The heat pump zone control system with buffer water tank as described in claim 1, characterized in that, The bottom of the buffer tank (1) is provided with a water supply pipe, and the water supply pipe is provided with a water supply valve (9).

Images