Double-cavity 1.5-time buffer water tank and air source heat pump system

Abstract

The utility model belongs to the technical field of air source heat pumps, and particularly relates to a double-cavity 1.5-time buffer water tank and an air source heat pump system.The double-cavity 1.5-time buffer water tank comprises a first inner container and a second inner container, and the first inner container and the second inner container are arranged side by side; the first inner container is provided with a first water inlet and a first water outlet; the second inner container is provided with a second water inlet and a second water outlet; a channel is further arranged between the first inner container and the second inner container, and a one-way valve is arranged on the channel. The flow allowed by the one-way valve is from the first inner container to the second inner container. According to the utility model, a single-cavity buffer water tank is decomposed into a double-cavity 1.5-time buffer water tank, so that the size of each sub-cavity water tank is reduced, the overall size is finally changed, and the installation adaptability is stronger.

Description

Technical Field

[0001] This application relates to the field of air source heat pump technology, and in particular to a dual-chamber 1.5-stage buffer water tank and an air source heat pump system. Background Technology

[0002] Currently, air source heat pump systems are widely used for heating and cooling in indoor water circulation systems due to their good energy-saving effect, such as underfloor heating systems, radiator systems, and fan coil systems.

[0003] Existing air source heat pump systems often require the use of a buffer water tank, which is added between the air source heat pump and the indoor water circulation system. Its main function is to increase the water volume in the circulation circuit, reduce the frequent start-ups and shutdowns of the air source heat pump system caused by low water volume and drastic temperature changes, thereby increasing the service life of the air source heat pump system and reducing electricity consumption.

[0004] However, existing buffer tanks are often large in size and capacity, requiring a large installation space. Due to the limitations of the installation location, traditional buffer tanks are difficult to install in many narrow environments. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the buffer water tank of existing air source heat pump systems is too large and difficult to install.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dual-chamber 1.5-stage buffer tank, comprising:

[0008] The first inner liner and the second inner liner are arranged side by side;

[0009] The first inner tank is provided with a first water inlet and a first water outlet;

[0010] The second inner tank is equipped with a second water inlet and a second water outlet;

[0011] A channel is provided between the first inner liner and the second inner liner, and a one-way valve is provided on the channel; the one-way valve allows the flow to be from the first inner liner to the second inner liner.

[0012] Preferred,

[0013] An indoor pump is installed at the first water outlet.

[0014] Preferred,

[0015] The second outlet is equipped with a unit pump.

[0016] An air source heat pump system, comprising:

[0017] An air source heat pump and a dual-chamber 1.5-stage buffer water tank; the dual-chamber 1.5-stage buffer water tank is connected between the air source heat pump and the water circulation system.

[0018] Preferred,

[0019] The first water inlet is connected to the water outlet of the air source heat pump, and the first water outlet is connected to the water inlet of the water circulation system through the indoor pump.

[0020] The second water inlet is connected to the water outlet of the water circulation system, and the second water outlet is connected to the water inlet of the air source heat pump through the unit pump.

[0021] Preferably, the water circulation system is a floor heating system, a radiator system, or a fan coil system.

[0022] Compared with the prior art, the advantages of this utility model are:

[0023] This invention decomposes a single-chamber buffer tank into a dual-tank buffer tank. While maintaining the original tank capacity, the size of each inner tank can be reduced, allowing for more flexible installation compared to traditional single-chamber buffer tanks. This makes it suitable for more confined installation environments, enabling the installation of the dual-chamber 1.5-stage buffer tank in situations where traditional buffer tanks cannot be installed. Furthermore, by adding a one-way valve to the passage between the first and second inner tanks, the problem of water mixing between the two tanks is solved, improving the system's COP value and stability, and further enhancing energy efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a dual-cavity 1.5-stage buffer water tank proposed in this utility model.

[0025] Figure 2 This is a schematic diagram of the structure of an air source heat pump system proposed in this utility model.

[0026] In the diagram: 1. First inner tank; 2. Second inner tank; 3. Channel; 4. Check valve; 5. Indoor pump; 6. Unit pump; 7. Air source heat pump; 8. Underfloor heating system; 9. Fan coil system; 11. First water inlet; 12. First water outlet; 21. Second water inlet; 22. Second water outlet. Detailed Implementation

[0027] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this embodiment, and not all embodiments.

[0028] The implementation of the dual-chamber 1.5-stage hydraulic module proposed in this application is as follows: Figure 1 As shown, it includes:

[0029] First inner liner (1) and second inner liner (2); the first inner liner (1) and second inner liner (2) are arranged side by side; the first inner liner (1) and second inner liner (2) can be a single integral structure.

[0030] The first inner liner (1) is provided with a first water inlet (11) and a first water outlet (12);

[0031] The second inner tank is provided with a second water inlet (21) and a second water outlet (22);

[0032] A channel (3) is provided between the first inner liner (1) and the second inner liner (2). This channel can be achieved by opening a hole in the inner wall between the first inner liner (1) and the second inner liner (2). A one-way valve (4) is provided on the channel (3). The one-way valve (4) allows the flow to flow from the first inner liner (1) to the second inner liner (2).

[0033] Through the above design, the existing single-chamber buffer tank is designed as two inner tanks connected by a channel. In this way, while keeping the total water capacity unchanged, the size of each inner tank is smaller than that of the single-chamber tank. Therefore, in some narrow environments where the original single-chamber buffer tank cannot be installed, the dual-chamber 1.5-stage buffer tank of this application can be installed, which can adapt to more different installation environments and is more flexible in installation than the existing single-chamber buffer tank.

[0034] As a preferred embodiment, an indoor pump (5) may also be installed on the first outlet (12), which is used to transport water from the first inner tank (1) to the outside of the inner tank.

[0035] As a preferred embodiment, a unit pump (6) may also be provided on the second outlet (22), which is used to transport the water in the second inner tank (2) out of the inner tank.

[0036] In the specific installation of the above-mentioned dual-chamber 1.5-stage buffer water tank, the first inlet (11) can be connected to the outlet of the air source heat pump (7), the first outlet (12) can be connected to the inlet of the indoor water circulation system through the indoor pump (5); the second inlet (21) can be connected to the outlet of the indoor water circulation system, and the second outlet (22) can be connected to the inlet of the air source heat pump (7) through the unit pump (6); after connecting the dual-chamber 1.5-stage buffer water tank between the air source heat pump (7) and the indoor water circulation system, a system can be formed as follows: Figure 2 The air source heat pump system shown is... Figure 2 The direction of the middle arrow indicates the direction of water flow in the overall system. Specifically, the water circulation system can be a floor heating system (8), a radiator system, or a fan coil system (9), or as... Figure 2The floor heating system (8) is connected in parallel with the fan coil system (9).

[0037] like Figure 2 As shown, after changing from a single cavity to a double inner tank, the change in the internal water circuit may cause the overall system to be unstable or the coefficient of performance (COP) value to decrease. Therefore, this application provides a channel (3) connecting the two inner tanks and a one-way valve (4) between the first inner tank (1) and the second inner tank (2) to reduce its negative impact.

[0038] By setting up the channel (3) and the one-way valve (4), it is possible to achieve 1.5 rounds of mixing or no mixing between the two inner tanks. The specific operation mode is as follows:

[0039] Single-cycle non-mixing operation mode: When the air source heat pump system is running, the unit pump (6) delivers the heat transfer medium (usually water) in the second inner tank (2) to the air source heat pump (7) for heating (or cooling). The heat transfer medium heated (or cooled) by the air source heat pump (7) flows to the first inner tank (1). The indoor pump (5) then delivers the medium in the first inner tank (1) to the underfloor heating system (8) and the fan coil system (9) for use. The circulated medium flows back to the second inner tank (2) and is then delivered to the air source heat pump (7) by the unit pump (6). The heat transfer medium circulates back and forth in the system to achieve the purpose of temperature regulation. During this process, the first inner tank (1) and the second inner tank (2) are connected by a channel (3) and a one-way valve (4) is installed in the pipeline. The medium can only flow from the first inner tank (1) to the second inner tank (2) and cannot flow back. During system operation, when the flow rate of the indoor pump (5) is greater than that of the unit pump (6), the internal pressure of the first inner tank (1) will be less than that of the second inner tank (2). If a check valve (4) is not installed in the channel (3), the flow of the medium in this direction cannot be stopped. The heat transfer medium in the second inner tank (2) will flow to the first inner tank (1) through the channel (3), resulting in mixed water. When the system forms mixed water, it will reduce the system COP value. Installing a check valve (4) here can prevent this phenomenon and increase the system COP value.

[0040] 1.5-time mixed water circulation operation mode: When the air source heat pump system is running, the unit pump (6) delivers the heat transfer medium in the second inner tank (2) to the air source heat pump (7) for heating (or cooling). The heat transfer medium heated (or cooled) by the air source heat pump (7) flows to the first inner tank (1). The indoor pump (5) then delivers the medium in the first inner tank (1) to the underfloor heating system (8) and the fan coil system (9) for use. The circulated medium flows back to the second inner tank (2) and is then delivered to the air source heat pump (7) by the unit pump (6). The heat transfer medium circulates repeatedly in the whole system to achieve the purpose of temperature regulation. During this process, if the floor heating system (8) and the fan coil system (9) are partially shut down, the flow rate of the indoor pump (5) will decrease. When the flow rate is lower than the minimum operating flow rate of the air source heat pump (7), the air source heat pump (7) will report a water flow fault. At this time, it is necessary to ensure that the flow rate of the unit pump (6) is greater than the minimum flow rate required by the air source heat pump (7) so that the system can operate normally. At this time, the first inner tank (1) and the second inner tank (2) are connected by a channel (3) and a one-way valve (4) is installed in the channel (3). The medium can only flow from the first inner tank (1) to the second inner tank (2) and cannot flow back. When the system enters the above working condition, the internal pressure of the first inner tank (1) will be greater than the internal pressure of the second inner tank (2). The heat transfer medium in the first inner tank (1) will flow to the second inner tank (2) through the channel (3) to form a medium circulation. The flow rate of the floor heating system (8) and the fan coil system (9) plus the circulation flow rate between the inner tanks is greater than the minimum flow rate required by the air source heat pump (7). At this time, the situation of insufficient overall flow rate and fault reporting caused by low opening rate of indoor heat dissipation equipment can be eliminated, thereby improving the stability of the system.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dual-chamber 1.5 order surge tank characterized by: Comprising: a first inner tank and a second inner tank, which are arranged side by side; the first inner tank is provided with a first water inlet and a first water outlet; the second inner tank is provided with a second water inlet and a second water outlet; a channel is further provided between the first inner tank and the second inner tank, and a one-way valve is arranged on the channel; the one-way valve allows flow from the first inner tank to the second inner tank.

2. The dual-chamber 1.5 order surge tank according to claim 1, characterized in that, a room pump is arranged on the first water outlet.

3. The dual-chamber 1.5 order cushion tank according to claim 1, wherein, a unit pump is arranged on the second water outlet.

4. An air source heat pump system characterised in that, Comprising: an air source heat pump and the double-cavity 1.5 buffer water tank according to any one of claims 1-3; the double-cavity 1.5 buffer water tank is connected between the air source heat pump and a water circulation system.

5. The air source heat pump system of claim 4, wherein, the first water inlet is connected with a water outlet of the air source heat pump, and the first water outlet is connected with a water inlet of the water circulation system through the room pump; the second water inlet is connected with a water outlet of the water circulation system, and the second water outlet is connected with a water inlet of the air source heat pump through the unit pump.

6. The air source heat pump system of claim 5, wherein, the water circulation system is a floor heating system, a radiator system or a fan coil system.

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