Air-cooled heat pump unit with low carbon emission

Abstract

The utility model relates to the technical field of air-cooled heat pump units, in particular to a low-carbon-emission air-cooled heat pump unit which is provided with a compressor, a plate heat exchanger, a first storage device and an air heat exchanger, the compressor is communicated with the plate heat exchanger, the plate heat exchanger is communicated with the first storage device, and the first storage device is communicated with the air heat exchanger. The air heat exchanger is communicated with the compressor, a refrigerant R454B is compressed by the compressor, high-temperature and high-pressure gas is conveyed into the plate heat exchanger through the four-way valve to heat heating hot water, then the refrigerant flows to the throttling valve through the first liquid storage device, and the refrigerant is converted into a low-temperature and low-pressure gas-liquid two-phase state; the air heat exchanger exchanges heat with the outside, high-temperature and low-pressure gas is converted into the high-temperature and low-pressure gas and returns into the compressor through the four-way valve, refrigeration principle circulation is completed, the opening degree of the throttling valve is controlled through the exhaust temperature, and therefore the high-temperature gas compressed by the compressor can exchange heat with a water medium more sufficiently and accurately, and the energy efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-cooled heat pump units, in particular to a low-carbon emission air-cooled heat pump unit. Background Art

[0002] All heat pump units on the market use R410A refrigerant. The most commonly used R410A alternatives are R32 and R454B. Among them, the carbon emissions of R410A and R32 are greater than those of R454B. Under the same cooling capacity, the R454B filling amount is 17% less than that of R410A. Under the same working conditions, the refrigeration energy efficiency of R454B is 4.1% higher than that of R410A, and the refrigeration energy efficiency is 3.7% higher.

[0003] Therefore, this application specifically designs a heat pump unit compatible with R454B refrigerant. Content of the Utility Model

[0004] To solve the above technical problems, the purpose of the utility model is to provide a low-carbon emission air-cooled heat pump unit, which can be compatible with R454B refrigerant, reduce carbon emissions and increase energy utilization efficiency.

[0005] The technical solution adopted by the utility model to solve the problem is: a low-carbon emission air-cooled heat pump unit, including an electrical box. A compressor, a plate heat exchanger, a first storage tank and an air heat exchanger are arranged at the lower part of the electrical box. A four-way valve is also included. The compressor is connected to the plate heat exchanger through the four-way valve. The plate heat exchanger is connected to the first storage tank. The first storage tank is connected to the air heat exchanger. A throttle valve is arranged between the first storage tank and the air heat exchanger. The air heat exchanger is connected to the compressor through the four-way valve.

[0006] As a further improvement of the above technical solution, a second storage tank is also included. The compressor is connected to the second storage tank through the four-way valve.

[0007] As a further improvement of the above technical solution, an air-cooling component is arranged at the upper part of the electrical box. The air-cooling component is connected to the top and the bottom of the electrical box.

[0008] As a further improvement of the above technical solution, an intake fan is arranged at the front side of the electrical box. The intake fan is connected to the inside of the electrical box. An air outlet is arranged at the side of the electrical box. The air outlet is connected to the inside of the electrical box.

[0009] As a further improvement of the above technical solution, a heating wire module is wrapped around the pipeline of the plate heat exchanger.

[0010] The beneficial effects of the present utility model are as follows: During use, the refrigerant R454B is compressed by the compressor and the high-temperature and high-pressure gas is transported to the plate heat exchanger through the four-way valve to heat the heating hot water. Then the refrigerant flows through the first liquid storage device to the throttle valve, where the refrigerant is transformed into a low-temperature and low-pressure gas-liquid two-phase state. It exchanges heat with the outside through the air heat exchanger and is transformed into a high-temperature and low-pressure gas, and then returns to the compressor through the four-way valve to complete the refrigeration principle cycle. The opening of the throttle valve is controlled by the exhaust temperature, so that the high-temperature gas compressed by the compressor can be more fully exchanged with the water medium, achieving an improvement in energy efficiency. Brief Description of the Drawings

[0011] The following further explains and illustrates the present utility model in combination with the drawings and specific embodiments.

[0012] Figure 1 It is the layout diagram of the air-cooled heat pump unit of the present utility model;

[0013] Figure 2 It is the structural diagram of the electric box of the present utility model.

[0014] In the figure: 1 - electric box, 11 - intake fan, 12 - air outlet, 2 - compressor, 3 - plate heat exchanger, 4 - first storage device, 5 - air heat exchanger, 6 - four-way valve, 7 - second storage device, 8 - air-cooled component, 9 - throttle valve. Specific Embodiments

[0015] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0016] In the description of the present utility model, it should be understood that for the orientation description, such as the upper, lower, front, rear, left, right, etc. indicating the orientation or position relationship is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the present utility model.

[0017] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, above, below, within, etc. are understood as including the present number. If there is a description of the first and the second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0018] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0019] Referring to Figure 1 and Figure 2 , a low-carbon emission air-cooled heat pump unit includes an electrical box 1. A compressor 2, a plate heat exchanger 3, a first reservoir 4, and an air heat exchanger 5 are arranged at the lower part of the electrical box 1. It further includes a four-way valve 6. The compressor 2 is connected to the plate heat exchanger 3 through the four-way valve 6. The plate heat exchanger 3 is connected to the first reservoir 4. The first reservoir 4 is connected to the air heat exchanger 5. A throttle valve 9 is arranged between the first reservoir 4 and the air heat exchanger 5. The air heat exchanger 5 is connected to the compressor 2 through the four-way valve 6.

[0020] During use, the refrigerant R454B is compressed by the compressor 2 and the high-temperature and high-pressure gas is transported to the plate heat exchanger 3 through the four-way valve 6 to heat the heating hot water. Then the refrigerant flows through the first liquid reservoir 4 to the throttle valve 9, where the refrigerant is transformed into a low-temperature and low-pressure gas-liquid two-phase state. It exchanges heat with the outside through the air heat exchanger 5 and is transformed into a high-temperature and low-pressure gas and returns to the compressor 2 through the four-way valve 6, completing the refrigeration principle cycle. The opening degree of the throttle valve 9 is controlled by the exhaust temperature, so as to more fully exchange heat between the high-temperature gas compressed by the compressor 2 and the water medium, realizing the improvement of energy efficiency.

[0021] In a preferred embodiment, it further includes a second reservoir 7. The compressor 2 is connected to the second reservoir 7 through the four-way valve 6. The second reservoir 7 is used to store the refrigerant to prevent energy waste when the required power of the heat pump unit is relatively small.

[0022] In a preferred embodiment, an air-cooling component 8 is arranged at the upper part of the electrical box 1. The air-cooling component 8 is connected to the top and bottom of the electrical box 1. The heat pump component is dissipated by the air-cooling component 8, and the heat is discharged from the top of the electrical box 1.

[0023] In a preferred embodiment, an intake fan 11 is arranged on the front side of the electrical box 1. The intake fan 11 is connected to the inside of the electrical box 1. An air outlet 12 is arranged beside the electrical box 1. The air outlet 12 is connected to the inside of the electrical box 1.

[0024] Air enters the inside of the electrical box 1 through the intake fan 11 and flows out from the air outlet 12. When the refrigerant inside the heat pump unit leaks, when the concentration of the refrigerant in the unit is high and it contacts the electrical components, static electricity will be generated during the suction process of the electrical components, which may ignite the refrigerant and cause an explosion. A refrigerant concentration detector is arranged inside the unit. When the refrigerant leakage reaches a certain concentration, the unit will cut off the action with the electricity.

[0025] In a preferred embodiment, a heating wire module is wrapped around the pipeline of the plate heat exchanger 3. When the ambient temperature is below 0°C and the main power supply of the unit is cut off, a backup power supply can be used to heat the water in the pipeline to prevent the water from freezing and bursting the plate heat exchanger 3, thereby leaking the refrigerant.

[0026] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A low carbon emission air-cooled heat pump unit, comprising an electric box (1), characterized in that: The lower part of the electrical box (1) is provided with a compressor (2), a plate heat exchanger (3), a first storage tank (4) and an air heat exchanger (5), and also includes a four-way valve (6); the compressor (2) is connected to the plate heat exchanger (3) via the four-way valve (6); the plate heat exchanger (3) is connected to the first storage tank (4); the first storage tank (4) is connected to the air heat exchanger (5); a throttle valve (9) is provided between the first storage tank (4) and the air heat exchanger (5); and the air heat exchanger (5) is connected to the compressor (2) via the four-way valve (6).

2. A low carbon emission air-cooled heat pump unit as claimed in claim 1, characterized in that: It also includes a second reservoir (7), and the compressor (2) is connected to the second reservoir (7) through a four-way valve (6).

3. A low carbon emission air-cooled heat pump unit as claimed in claim 2, characterized in that: An air cooling component (8) is provided on the upper part of the electric box (1), and the air cooling component (8) is connected to the top and the lower part of the electric box (1).

4. A low carbon emission air-cooled heat pump unit as claimed in claim 3, characterized in that: An air inlet fan (11) is arranged on the front side of the electric box (1), and the air inlet fan (11) is connected to the interior of the electric box (1). An air outlet (12) is arranged on the side of the electric box (1), and the air outlet (12) is connected to the interior of the electric box (1).

5. A low carbon emission air-cooled heat pump unit as claimed in claim 4, characterized in that: The pipeline of the plate heat exchanger (3) is wrapped with a heating wire module.

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