Automatic pressure balancing device for air conditioner and heat pump system

Abstract

The utility model provides an automatic pressure balancing device for an air conditioner and a heat pump system. An automatic pressure balancing device of an air conditioner and heat pump system comprises a box body, liquid storage equipment, a liquid injection pump, a pressure collecting device, a liquid injection pipeline, an electric control system, a pressure relief pipeline, a pressure relief valve and a one-way valve. One end of the liquid injection pipeline is connected to a first liquid outlet connector at the bottom of the liquid storage equipment, the other end of the liquid injection pipeline penetrates through the box body and extends out of the box body, a second liquid outlet connector at the other end of the liquid injection pipeline is connected with a pipeline of the air conditioner / heat pump system, and a liquid injection pump, a one-way valve and a pressure acquisition device are sequentially arranged on the liquid injection pipeline; and one end of the pressure relief pipeline is connected to the liquid injection pipeline. According to the automatic pressure balancing device for the air conditioner and heat pump system, the defects that secondary faults are likely to be derived finally due to the material problem and the maintenance problem of an existing expansion tank, and the maintenance cost of the existing expansion tank is high are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of heating devices, in particular to an automatic pressure balancing device for air conditioners and heat pump systems. Background Art

[0002] In the current national promotion of energy conservation and emission reduction, and the process of rural coal-to-electricity conversion, air conditioning / heat pump systems have been widely used, and each system uses an expansion tank. The function of the expansion tank is to balance the volume change of water or antifreeze in the system during thermal expansion and contraction, but the existing expansion tank structure has many disadvantages. First, the airbag in the expansion tank is made of rubber. The rubber airbag and the antifreeze (main component ethylene glycol) added to the system will react chemically, and the reaction will be accelerated under high temperature and high pressure conditions, eventually leading to damage to the airbag, the expansion tank loses its expansion and contraction function and brings more serious secondary failures; second, the expansion tank needs to be regularly tested for pressure and replenished with air every year, which requires professional equipment and maintenance personnel, and will incur corresponding expenses. However, general users cannot maintain it correctly. When the expansion tank is not inflated and pressurized for a long time, it will lose its expansion function and become a decoration, eventually leading to secondary failures and causing greater losses (pipeline system thermal expansion and bursting, pipe leakage causing indoor water soaking, air conditioning or heat pump failure, etc.).

[0003] In summary, the existing expansion tanks may eventually cause secondary failures due to material problems and maintenance issues, and the existing expansion tanks have the defect of high maintenance costs. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an automatic pressure balancing device for air conditioning and heat pump systems to solve the defects that the existing expansion tank may eventually lead to secondary failures due to material problems and maintenance problems, and the existing expansion tank has the defect of high maintenance cost.

[0005] According to a first aspect of the utility model, an automatic pressure balancing device for an air-conditioning and heat pump system is provided, the automatic pressure balancing device for an air-conditioning and heat pump system is connected to the air-conditioning / heat pump system, and comprises: a box, a liquid storage device, a liquid injection pump, a pressure collection device, a liquid injection pipeline, an electric control system, a pressure relief pipeline, a pressure relief valve and a one-way valve;

[0006] The liquid storage device, liquid injection pump, pressure collection device, liquid injection pipeline, electronic control system, pressure relief pipeline, pressure relief valve and one-way valve are all located inside the box;

[0007] One end of the injection pipe is connected to the first liquid outlet interface at the bottom of the liquid storage device, the other end of the injection pipe extends through the box body to the outside of the box body, and the second liquid outlet at the other end of the injection pipe is connected to the pipe of the air conditioning / heat pump system, and the injection pipe is provided with an injection pump, a one-way valve and a pressure collection device in sequence, and the injection pump is arranged close to the liquid storage device;

[0008] One end of the pressure relief pipe is connected to the liquid injection pipe, and the junction between the pressure relief pipe and the liquid injection pipe is located below the pressure collection device. The other end of the pressure relief pipe is connected to the liquid inlet interface on the upper end of the liquid storage device. A pressure relief valve is provided on the pressure relief pipe.

[0009] The injection pump and the pressure collection device are both connected to the electronic control system.

[0010] Optionally, it also includes an automatic exhaust valve and an exhaust pipe;

[0011] One end of the exhaust pipe is connected to the liquid injection pipe, and the junction between the exhaust pipe and the liquid injection pipe is located between the liquid injection pump and the one-way valve.

[0012] Optionally, the liquid storage device is a flexible liquid storage bag, a weight sensor is provided at the bottom of the flexible liquid storage bag, and the weight sensor is connected to the electronic control system.

[0013] Optionally, the liquid storage device is a liquid storage tank, a liquid level sensor is provided at the lower end of the interior of the liquid storage tank, and the liquid level sensor is connected to the electronic control system.

[0014] According to the utility model, an automatic pressure balancing device for air conditioning and heat pump system is provided. The liquid storage device, the liquid injection pump, the pressure collection device, the liquid injection pipeline, the electronic control system, the pressure relief pipeline, the pressure relief valve and the one-way valve are all located inside the box; one end of the liquid injection pipeline is connected to the first liquid outlet interface at the bottom of the liquid storage device, the other end of the liquid injection pipeline extends through the box to the outside of the box, and the second liquid outlet at the other end of the liquid injection pipeline is connected to the pipeline of the air conditioning / heat pump system, the liquid injection pipeline is provided with a liquid injection pump, a one-way valve and a pressure collection device in sequence, and the liquid injection pump is arranged near the liquid storage device; one end of the pressure relief pipeline is connected to the liquid injection pipeline, and the junction between the pressure relief pipeline and the liquid injection pipeline is located below the pressure collection device, the other end of the pressure relief pipeline is connected to the liquid inlet interface on the upper end of the liquid storage device, and the pressure relief pipeline is provided with a pressure relief valve; the arrangement that the liquid injection pump and the pressure collection device are both connected to the electronic control system can automatically operate without maintenance after the equipment is turned on, can automatically operate according to the system pressure, is more intelligent and convenient, and can also effectively prevent the oxidation of antifreeze and the corrosion of dissolved oxygen in water to the air conditioning / heat pump system. Therefore, the utility model solves the defects that the existing expansion tank may eventually cause secondary failures due to material problems and maintenance problems, and the existing expansion tank has high maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the overall structure of an automatic pressure balancing device for an air-conditioning and heat pump system provided by the utility model.

[0016] List of reference numerals:

[0017] 1. Box; 2. Liquid storage device; 3. Liquid injection pump; 4. Pressure collection device; 5. Liquid injection pipeline; 6. Electronic control system; 7. Pressure relief pipeline; 8. Pressure relief valve; 9. Automatic exhaust valve; 10. Exhaust pipeline; 11. Check valve; 12. Weight sensor; 13. First liquid outlet interface; 14. Second liquid outlet interface; 15. Liquid inlet interface. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Reference Figure 1 The utility model provides an automatic pressure balancing device for air conditioning and heat pump systems, which can solve the defects that the existing expansion tank may eventually lead to secondary failures due to material problems and maintenance problems, and the existing expansion tank has high maintenance costs.

[0022] The utility model provides an automatic pressure balancing device for air conditioning and heat pump system, which is connected to the air conditioning / heat pump system and includes: a box 1, a liquid storage device 2, a liquid injection pump 3, a pressure collection device 4, a liquid injection pipeline 5, an electronic control system 6, a pressure relief pipeline 7, a pressure relief valve 8 and a one-way valve 11;

[0023] The liquid storage device 2, the liquid injection pump 3, the pressure collection device 4, the liquid injection pipeline 5, the electronic control system 6, the pressure relief pipeline 7, the pressure relief valve 8 and the one-way valve 11 are all located inside the box 1;

[0024] One end of the injection pipe 5 is connected to the first liquid outlet interface 13 at the bottom of the liquid storage device 2, and the other end of the injection pipe 5 extends through the box body 1 to the outside of the box body 1, and the second liquid outlet interface 14 at the other end of the injection pipe 5 is connected to the pipe of the air conditioning / heat pump system, and the injection pipe 5 is provided with an injection pump 3, a one-way valve 11 and a pressure collection device 4 in sequence, and the injection pump 3 is arranged close to the liquid storage device 2;

[0025] One end of the pressure relief pipe 7 is connected to the liquid injection pipe 5, and the junction between the pressure relief pipe 7 and the liquid injection pipe 5 is located below the pressure collection device 4. The other end of the pressure relief pipe 7 is connected to the liquid inlet interface 15 at the upper end of the liquid storage device 2. The pressure relief pipe 7 is provided with a pressure relief valve 8;

[0026] The injection pump 3 and the pressure collection device 4 are both connected to the electronic control system 6 .

[0027] Among them, the box body 1, the liquid storage device 2, the injection pump 3, the pressure collection device 4, the injection pipeline 5, the electronic control system 6, the pressure relief pipeline 7, the pressure relief valve 8 and the one-way valve are all existing products, which can be specifically used to achieve the functions and effects of this application; the one-way valve 11 can ensure that the pure water or antifreeze in the exhaust pipeline 10 does not overflow.

[0028] The utility model provides an automatic pressure balancing device for air conditioning and heat pump system, wherein a liquid storage device 2, a liquid injection pump 3, a pressure collection device 4, a liquid injection pipeline 5, an electronic control system 6, a pressure relief pipeline 7, a pressure relief valve 8 and a one-way valve 11 are all located inside a box body 1; one end of the liquid injection pipeline 5 is connected to a first liquid outlet interface 13 at the bottom of the liquid storage device 2, the other end of the liquid injection pipeline 5 passes through the box body 1 and extends to the outside of the box body 1, and a second liquid outlet interface 14 at the other end of the liquid injection pipeline 5 is connected to a pipeline of the air conditioning / heat pump system, and the liquid injection pump 3, the one-way valve 11 and the pressure collection device 4 are sequentially arranged on the liquid injection pipeline 5. , and the injection pump 3 is arranged near the liquid storage device 2; one end of the pressure relief pipe 7 is connected to the injection pipe 5, and the junction between the pressure relief pipe 7 and the injection pipe 5 is located below the pressure collection device 4, and the other end of the pressure relief pipe 7 is connected to the liquid inlet interface 15 at the upper end of the liquid storage device 2, and a pressure relief valve 8 is arranged on the pressure relief pipe 7; the injection pump 3, the pressure collection device 4 and the pressure relief valve 8 are all connected to the electronic control system 6, which can automatically operate without maintenance after the equipment is turned on, and can automatically operate according to the system pressure, which is more intelligent and convenient, and can also effectively prevent the oxidation of antifreeze and the corrosion of dissolved oxygen in water to the air conditioning / heat pump system. Therefore, the utility model solves the defects that the existing expansion tank may eventually derive secondary failures due to material problems and maintenance problems, and the existing expansion tank has high maintenance costs.

[0029] Reference Figure 1 , optionally, also includes an automatic exhaust valve 9 and an exhaust pipe 10;

[0030] One end of the exhaust pipe 10 is connected to the liquid injection pipe 5 , and the junction between the exhaust pipe 10 and the liquid injection pipe 5 is located between the liquid injection pump 3 and the one-way valve 11 .

[0031] Among them, the automatic exhaust valve 9 and the exhaust pipe 10 are both existing products, which can be used to achieve the functions and effects of this application. The automatic exhaust valve 9 and the exhaust pipe 10 are set to automatically exhaust the air mixed in the pure water or antifreeze.

[0032] Reference Figure 1 Optionally, the liquid storage device 2 is a flexible liquid storage bag, a weight sensor 12 is provided at the bottom of the flexible liquid storage bag, and the weight sensor 12 is connected to the electronic control system 6.

[0033] Among them, the weight sensor 12 is an existing product, and the weight sensor 12 is used to measure the weight of the flexible liquid storage bag; in addition, because the flexible liquid storage bag is made of a flexible material (such as a plastic bag), its shape and size can change with the volume of pure water or antifreeze in the flexible liquid storage bag, and the liquid in the bag is not in contact with the outside air, which can prevent the oxidation and deterioration of the antifreeze and the dissolved oxygen in the water from causing system corrosion and other hazards.

[0034] Optionally, the liquid storage device 2 is a liquid storage tank, and a liquid level sensor is provided at the lower end of the interior of the liquid storage tank, and the liquid level sensor is connected to the electronic control system 6.

[0035] Among them, the liquid level sensor is an existing product, and the liquid level sensor is used to measure the liquid level of the liquid storage tank.

[0036] Working principle: (This application takes the liquid storage device 2 as a flexible liquid storage bag as an example)

[0037] After the present application is connected to the pipeline of the air conditioning / heat pump system, add an appropriate amount of pure water or antifreeze into the flexible liquid storage bag (it cannot be filled to the brim, and space must be reserved for the system to relieve pressure and return liquid), install all components as required, then start the electronic control system 6 and set the liquid injection opening pressure value and the liquid injection closing pressure value, set the pressure relief value and the pressure relief value is greater than the liquid injection closing pressure value; when the pressure acquisition device 4 determines that the system pressure is lower than the opening pressure, the liquid injection pump 3 is turned on, and when the pressure reaches the set closing pressure value or the weight in the flexible liquid storage bag decreases (the weight sensor 12 measures the weight in the flexible liquid storage bag), the liquid injection pump 3 is turned off, and the opening and closing of the liquid injection pump 3 is automatically operated according to the above logic; when the system is heating, the volume of the pure water or antifreeze in the system expands and the system pressure increases, exceeding the pressure relief value set by the equipment, and the pure water or antifreeze in the system returns to the flexible liquid storage bag through the pressure relief valve 8 and the pressure relief pipeline 7, and the purpose of automatic balance of the system pressure is achieved through the above steps.

[0038] In addition, the electronic control device in the present application can set operating modes such as timed fluid replenishment, constant pressure fluid replenishment, fixed pressure relief, fluid shortage alarm, and excess fluid alarm for the air conditioning / heat pump system.

[0039] It should be noted that not all steps and modules in the above-mentioned processes and system structure diagrams are necessary, and some steps or modules can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The system structure described in the above-mentioned embodiments can be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or some components in multiple independent devices may be implemented together.

[0040] In the above embodiments, the hardware module can be implemented mechanically or electrically. The above text shows and describes the present invention in detail through the accompanying drawings and preferred embodiments, but the present invention is not limited to these disclosed embodiments. Based on the above embodiments, those skilled in the art can know that the code review methods in the above different embodiments can be combined to obtain more embodiments of the present invention, and these embodiments are also within the protection scope of the present invention.

Claims

1. An automatic pressure balancing device for air conditioning and heat pump system, the automatic pressure balancing device for air conditioning and heat pump system is connected to the air conditioning / heat pump system, characterized in that: include: A box (1), a liquid storage device (2), a liquid injection pump (3), a pressure collection device (4), a liquid injection pipeline (5), an electronic control system (6), a pressure relief pipeline (7), a pressure relief valve (8) and a one-way valve (11); The liquid storage device (2), the liquid injection pump (3), the pressure collection device (4), the liquid injection pipeline (5), the electronic control system (6), the pressure relief pipeline (7), the pressure relief valve (8) and the one-way valve (11) are all located inside the box (1); One end of the injection pipe (5) is connected to the first liquid outlet interface (13) at the bottom of the liquid storage device (2), the other end of the injection pipe (5) passes through the box (1) and extends to the outside of the box (1), and the second liquid outlet (14) at the other end of the injection pipe (5) is connected to the pipe of the air conditioning / heat pump system, the injection pipe (5) is provided with the injection pump (3), the one-way valve (11) and the pressure collection device (4) in sequence, and the injection pump (3) is arranged close to the liquid storage device (2); One end of the pressure relief pipe (7) is connected to the liquid injection pipe (5), and the junction between the pressure relief pipe (7) and the liquid injection pipe (5) is located below the pressure collection device (4); the other end of the pressure relief pipe (7) is connected to the liquid inlet interface (15) at the upper end of the liquid storage device (2); and the pressure relief valve (8) is provided on the pressure relief pipe (7); The injection pump (3) and the pressure collection device (4) are both connected to the electronic control system (6).

2. The automatic pressure balancing device for air conditioning and heat pump system according to claim 1, characterized in that: It also includes an automatic exhaust valve (9) and an exhaust pipe (10); One end of the exhaust pipe (10) is connected to the liquid injection pipe (5), and the intersection between the exhaust pipe (10) and the liquid injection pipe (5) is located between the liquid injection pump (3) and the one-way valve (11).

3. The automatic pressure balancing device for air conditioning and heat pump system according to claim 1, characterized in that: The liquid storage device (2) is a flexible liquid storage bag, a weight sensor (12) is provided at the bottom of the flexible liquid storage bag, and the weight sensor (12) is connected to the electronic control system (6).

4. The automatic pressure balancing device for air conditioning and heat pump system according to claim 1, characterized in that: The liquid storage device (2) is a liquid storage tank, and a liquid level sensor is provided at the lower end of the interior of the liquid storage tank. The liquid level sensor is connected to the electronic control system (6).

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