Double-source-effect heat pump unit

Abstract

The utility model relates to the technical field of refrigeration and heat pump heating, and discloses a double-source-effect heat pump unit which comprises a unit frame, an electric box fixedly connected with the inner wall of the unit frame, a first compressor and a second compressor which are installed in a cavity of the unit frame, and a shell and tube heat exchanger installed in the cavity of the unit frame. One end of the shell-and-tube heat exchanger is communicated with a four-way valve body through a pipeline, an economizer is installed on one side of the shell-and-tube heat exchanger, and a throttling element is connected to one side of the economizer. According to the air source heat pump, an underground heat source is taken and a cold source is discharged to the underground in winter, and an underground cold source is taken and a heat source is discharged to the underground in summer, so that continuous and stable underground energy can be maintained, when the outdoor environment temperature is reduced (increased) in winter (summer), the heating (refrigerating) energy efficiency of the air source heat pump can be improved, and the underground heat source can be utilized in winter; the surface temperature of the finned heat exchanger is increased, the frosting possibility of the finned heat exchanger is reduced as much as possible, and the heating energy efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical fields of refrigeration and heat pump heating, and particularly relates to a dual-source efficient heat pump unit. Background Art

[0002] With the popularization of replacing coal with electricity, the application of air source heat pumps is becoming more and more common, but many problems have gradually emerged. The prerequisite for a single air source heat pump to generate heat (cool) is that there must be sufficient heat (cold source) in the environment. However, when the temperature is low (high) in winter (summer), the ability to capture heat (cold) in the air decreases, thus affecting the heating (cooling) energy efficiency of the air source heat pump. Especially when heating in winter, the surface temperature of the finned heat exchanger is low and it is easy to frost, resulting in particularly low heating energy efficiency. This requires a large amount of electric energy. In today's society with energy shortage, how to save energy and reduce consumption is one of the important tasks of every member of our society.

[0003] The existing heat source (cold source) of the air source heat pump is generally a single air source. The prerequisite for heating (cooling) is that there must be sufficient heat (cold source) in the air. However, when the temperature is low (high) in winter (summer), the ability to capture heat (cold) in the air decreases. Especially when heating in winter, the surface of the finned heat exchanger is also easy to frost, thus affecting the heating (cooling) energy efficiency of the air source heat pump. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a dual-source efficient heat pump unit, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] Including: a unit frame, an electric box fixedly connected to the inner wall of the unit frame, a first compressor and a second compressor installed in the cavity of the unit frame.

[0007] It further includes:

[0008] A shell-and-tube heat exchanger, installed in the cavity of the unit frame, and one end of the shell-and-tube heat exchanger is connected to a four-way valve body through a pipeline. An economizer is installed on one side of the shell-and-tube heat exchanger, a throttling element is connected to one side of the economizer, and a balance tank is connected between the economizer and the throttling element. A fluorine finned heat exchanger is installed on the surface of the unit frame, a water finned heat exchanger is installed outside the fluorine finned heat exchanger, and a balance tank is installed between the first compressor and the second compressor.

[0009] Furthermore, two groups of outdoor fans with spaced distribution are installed on the top of the unit frame.

[0010] Furthermore, a gas-liquid separator 1 is provided between the economizer and the balance tank, a gas-liquid separator 2 is installed on one side of the compressor 2, and the gas-liquid separator 1 and the gas-liquid separator 2 are connected to the compressor 1 and the compressor 2 through pipelines respectively.

[0011] Furthermore, a shell and tube heat exchanger water pipe is connected to the top of the shell and tube heat exchanger, and the end of the shell and tube heat exchanger water pipe passes through the side wall of the unit frame and extends outward to be connected to the indoor fan connector.

[0012] Furthermore, an underground heat source water heat exchange pipe is provided on one side of the indoor fan connector.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the winter, the present application takes underground heat sources and discharges cold sources into the underground, while in the summer, it takes underground cold sources and discharges heat sources into the underground, so that the continuous stability of underground energy can be maintained. When the outdoor ambient temperature decreases (increases) in winter (summer), the heating (cooling) efficiency of the air source heat pump can be improved. In winter, the underground heat source can also be used to increase the surface temperature of the fin-type heat exchanger, minimize the possibility of frosting on the fin-type heat exchanger, and further improve the heating efficiency. In winter, underground heat sources are taken, and in summer, heat sources can be reversely re-injected into the groundwater source, thereby maintaining the balance of underground energy. It has the functions of heating in winter and re-injecting heat sources into the underground in summer, and can also have the functions of heating in winter and re-injecting heat sources into the underground in summer while taking into account the cooling function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a top view of the utility model.

[0017] In the figure: 1. Unit frame; 2. Electric box; 3. Compressor 1; 4. Economizer; 5. Gas-liquid separator 1; 6. Compressor 2; 7. Gas-liquid separator 2; 8. Underground heat source water heat exchange pipe; 9. Shell and tube heat exchanger; 10. Four-way valve body; 11. Shell and tube heat exchange water pipe; 12. Balance tank; 13. Throttling element; 14. Indoor fan connector; 16. Fluorine fin heat exchanger; 17. Water fin heat exchanger; 18. Outdoor fan. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Please refer to Figure 1-2 , including: unit frame 1, compressor 1 installed in the cavity of unit frame 1, and compressor 2 6. The whole unit frame 1 is in a rectangular hollow shape. An electric box 2 is fixedly connected to the inner wall of one end of the unit frame 1 for supplying power and controlling the electrical components inside the unit frame 1. Oppositely distributed compressor 1 3 and compressor 2 6 are installed on both sides of the center of the unit frame 1. One side of both compressor 1 3 and compressor 2 6 is connected to gas-liquid separator 1 5 and gas-liquid separator 2 7 through pipelines, so that compressor 1 3 is connected to gas-liquid separator 1 5, and compressor 2 6 is connected to gas-liquid separator 2 7. The other ends of gas-liquid separator 1 5 and gas-liquid separator 2 7 are connected to a four-way valve body 10 through pipelines. One end of the four-way valve body 10 is connected back to compressor 1 3 through a pipeline. A shell-and-tube heat exchanger 9 with a larger diameter is fixedly installed on the bottom wall of the unit frame 1, so that another pipeline of the four-way valve body 10 is connected to the shell-and-tube heat exchanger 9. The last group of pipelines of the four-way valve body 10 is connected to a fluorine fin heat exchanger 16. The fluorine fin heat exchanger 16 is installed on the inner wall of the unit frame 1, and a water fin heat exchanger 17 is arranged outside the fluorine fin heat exchanger 16. An economizer 4 is installed on one side of the shell-and-tube heat exchanger 9. One side of the economizer 4 is connected to a throttling element 13. Two sets of economizer 4 and throttling element 13 are provided and are connected through pipelines. Another pipeline of the economizer 4 is connected to compressor 1 3, and the last group of pipelines of the economizer 4 is connected to the shell-and-tube heat exchanger 9. A balance tank 12 is arranged between the economizer 4 and the throttling element 13

[0020] Two sets of outdoor fans 18 are installed at intervals on the top of the unit frame 1, and a baffle fixedly arranged on the inner wall of the unit frame 1 is arranged between the two sets of outdoor fans 18. The baffle can reduce the air flow disturbance of the two sets of outdoor fans 18. A shell-and-tube heat exchanger water pipe 11 is connected to the top of the shell-and-tube heat exchanger 9. The end of the shell-and-tube heat exchanger water pipe 11 passes through the side wall of the unit frame 1 and extends outward to be connected to an indoor fan connector 14. The indoor fan connector 14 is connected to an indoor fan. An underground heat source water heat exchange pipe 8 is arranged on one side of the indoor fan connector 14, and the two sets of underground heat source water heat exchange pipes 8 are connected to an external underground hot water source pump

[0021] During heating, the low-pressure and low-temperature gaseous refrigerant is compressed by compressor 1-3 and compressor 2-6, and the refrigerant becomes high-pressure and high-temperature gaseous. Then it enters the four-way valve body 10 and then enters the shell-and-tube heat exchanger 9. The heat in the refrigerant is released to the water, and the hot water is sent to the room. The indoor fan connector 14 is connected to the indoor fan, and the indoor fan runs to obtain hot air. The refrigerant becomes high-pressure and normal-temperature liquid and enters the economizer 4. A balance tank 12 is connected between the economizer 4 and the throttling element 13. This balance tank 12 plays a role in regulating the pressure in the system. Most of the refrigerant (a small part of the refrigerant flows back to compressor 1-3 and compressor 2-6 to continue circulating, playing an enthalpy-increasing role) then enters the throttling element 13 to become low-pressure and low-temperature liquid refrigerant and then enters the fin-and-tube heat exchanger 16. Then the underground heat source water pump runs, and the underground heat source water enters the water fin heat exchanger 17 through the underground heat source water pump. The outdoor fan 18 runs to release the heat from the water fin heat exchanger 17 to heat the air entering the fin-and-tube heat exchanger 16.

The function is that when heating in winter, for relatively warmer air, the fin-and-tube heat exchanger 16 has a higher heat exchange efficiency, improving energy efficiency, and effectively preventing the fin-and-tube heat exchanger 16 from frosting or frequent defrosting

[0022] During refrigeration, in the system, the low-pressure and low-temperature gaseous refrigerant is compressed by compressor 1-3 and compressor 2-6, and the refrigerant becomes high-pressure and high-temperature gaseous. The high-pressure and high-temperature gaseous enters the four-way valve body 10 and then enters the fin-and-tube heat exchanger 16. The outdoor fan 18 runs, and the underground cold source water pump runs. The underground cold source water enters the water fin heat exchanger 17. The water fin heat exchanger 17 absorbs the heat in the air to lower the air temperature. At the same time, the temperature of the underground cold source water rises. The cooled air then enters the fin-and-tube heat exchanger 16. The function is that when refrigerating in summer, for relatively cooler air, the fin-and-tube heat exchanger 16 has a higher heat exchange efficiency, improving energy efficiency. The relatively warmer cold source water is taken underground by the operation of the underground cold source water pump. The function is to store heat in the underground heat source when refrigerating in summer to make up for the underground heat source taken in during heating in winter, so as to balance the underground heat source. The refrigerant becomes high-pressure and normal-temperature liquid and then enters the throttling element 13. The refrigerant becomes low-pressure and low-temperature liquid. A balance tank 12 (which plays a role in regulating the pressure in the system) is connected between the economizer 4 and the throttling element 13, and then enters the shell-and-tube heat exchanger 9. The low-temperature and low-pressure gaseous refrigerant absorbs the heat in the water, and the water temperature becomes lower (the cold water is sent to the room, and the indoor fan runs to obtain cold air). The refrigerant becomes low-pressure and low-temperature gaseous refrigerant to continue a new cycle.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-source heat pump unit, comprising: A unit frame (1), an electric box (2) fixedly connected to the inner wall of the unit frame (1), a compressor 1 (3) and a compressor 2 (6) installed in the cavity of the unit frame (1), It is characterized by further comprising: A shell and tube heat exchanger (9) is installed in the cavity of the unit frame (1), and one end of the shell and tube heat exchanger (9) is connected to a four-way valve body (10) through a pipeline. An economizer (4) is installed on one side of the shell and tube heat exchanger (9), a throttling element (13) is connected to one side of the economizer (4), and a balancing tank (12) is connected between the economizer (4) and the throttling element (13). A fluorine fin heat exchanger (16) is installed on the surface of the unit frame (1), a water fin heat exchanger (17) is installed on the outer side of the fluorine fin heat exchanger (16), and a balancing tank (12) is installed between the compressor 1 (3) and the compressor 2 (6).

2. A dual-source heat pump unit according to claim 1, characterized in that: Two groups of outdoor fans (18) are installed at intervals on the top of the unit frame (1).

3. A dual-source heat pump unit according to claim 1, characterized in that: A gas-liquid separator 1 (5) is arranged between the economizer (4) and the balance tank (12), and a gas-liquid separator 2 (7) is installed on one side of the compressor 2 (6). The gas-liquid separator 1 (5) and the gas-liquid separator 2 (7) are respectively connected to the compressor 1 (3) and the compressor 2 (6) through pipelines.

4. A dual-source effect heat pump unit according to claim 1, characterized in that: The top of the shell and tube heat exchanger (9) is connected to a shell and tube hot water exchange pipe (11), and the end of the shell and tube hot water exchange pipe (11) passes through the side wall of the unit frame (1) and extends outward to be connected to an indoor fan connector (14).

5. A dual-source effect heat pump unit according to claim 1, characterized in that: An underground heat source water heat exchange pipe (8) is arranged on one side of the indoor fan connecting piece (14).

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