A dual-source modular chilled water heat pump unit

Abstract

The present invention discloses a dual-source modular chilled water heat pump unit, which relates to the field of fin-type condensers, including a shell, a second capillary fin group is arranged inside the shell, a first capillary fin group is arranged on the top of the second capillary fin group, a wind pump is arranged inside the shell on one side of the second capillary fin group, a venturi jet tube matching the first capillary fin group is arranged at the air outlet end of the wind pump, and a vortex tube is arranged on the side of the shell away from the venturi jet tube. The present invention pushes the pressure gas into the venturi jet tube and then into the wind guide cover through the arranged wind pump, and after heat exchange with the first capillary fin group, the heated air passes through the pressure air duct and enters the vortex tube, and the cold air separated in the vortex tube is radiated to the air inlet of the electric fan, thereby cooling the air inlet of the electric fan.

Description

Technical Field

[0001] The invention relates to the field of finned condensers, in particular to a dual-source modular chilled water heat pump unit. Background Art

[0002] With the continuous development of refrigeration technology, the application of chilled water heat pump units in the field of refrigeration and heating is becoming more and more extensive. As a key component of the chilled water heat pump unit, the air-cooled finned condenser is responsible for condensing high-temperature and high-pressure refrigerant gas into high-pressure liquid. Its performance directly affects the overall efficiency and operating stability of the chilled water heat pump unit. Therefore, improving the heat dissipation efficiency and reliability of the air-cooled finned condenser is of great significance to improving the overall performance of the chilled water heat pump unit.

[0003] In the existing air-cooled fin condenser, the refrigerant gas enters the fin group through the capillary tube to dissipate heat. At the same time, the air pump or fan provides airflow to remove heat through the fin group. In this process, the airflow exchanges heat with the fin group, thereby achieving condensation of the refrigerant.

[0004] At present, most of the air-cooled finned condensers on the market use traditional heat dissipation structures. Although these structures meet the heat dissipation requirements to a certain extent, they are still insufficient in terms of heat dissipation efficiency and energy consumption. For example, by increasing the fin area and adding more fans for heat dissipation, although the heat dissipation efficiency is improved, the energy consumption increases exponentially, resulting in increased costs and energy consumption. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a dual-source modular chiller heat pump unit to solve the technical problem that the current dual-source modular chiller heat pump unit needs to add more fans and fins to increase efficiency, resulting in increased costs and energy consumption.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-source modular chilled water heat pump unit, comprising an evaporator, a compressor, an air-cooled finned condenser, a variable frequency axial flow fan, an expansion valve, a four-way reversing valve, a gas-liquid separator and a liquid reservoir, a first filter, a second filter and an oil separator, wherein the air-cooled finned condenser, the oil separator, the gas-liquid separator and the evaporator are connected to the four-way reversing valve, the air-cooled finned condenser comprises an outer shell, a second capillary fin group is arranged inside the outer shell, and a first capillary fin group is arranged on the top of the second capillary fin group. Tube-fin group, an air pump is arranged inside the shell on one side of the second capillary fin group, a Venturi jet tube cooperating with the first capillary fin group is arranged at the air outlet end of the air pump, a vortex tube is arranged on the side of the shell away from the Venturi jet tube, a pressure air duct is connected between the vortex tube and the first capillary fin group, an electric fan is arranged at one end of the second capillary fin group, the air outlet of the electric fan faces the second capillary fin group, and the cold air outlet of the vortex tube is connected to a cold air manifold extending to one side of the air inlet of the electric fan.

[0007] By adopting the above technical scheme, a shell is set to fix and cover all components, the internal capillary is condensed and cooled by the second capillary fin group, the internal capillary is condensed and cooled by the first capillary fin group, air is supplied by a wind pump, the airflow of the wind pump is introduced into the air guide cover through the Venturi jet tube, and the airflow of the guide tube is sucked in, the hot and cold air are separated by the vortex tube, the airflow is dispersed by the electric fan, the airflow is introduced into the vortex tube through the pressure air duct, and the cold air is guided to the air inlet side of the electric fan through the cold air manifold.

[0008] The present invention is further configured such that a guide pipe is provided on one side of the cold air perforated pipe, a one-way pipe is connected between the guide pipe and the venturi jet pipe, the guide pipe is L-shaped, and its horizontal section extends to the bottom of the cold air perforated pipe, and the horizontal section is provided with multiple groups of through holes.

[0009] By adopting the above technical solution, the guide pipe is set to guide the negative pressure of the Venturi jet tube, and the multiple groups of through holes cooperate with the negative pressure to suck the cold air emitted by the cold air perforated tube into the guide pipe and then into the Venturi jet tube for mixing, thereby reducing the initial air temperature.

[0010] The present invention is further configured such that a wind-blocking sleeve penetrating the guide tube is arranged on the outside of the cold air perforated tube, and the wind-blocking sleeve is provided with an air hole. When the air hole is moved to the outside of the guide tube, the inside of the guide tube can be closed and unable to circulate. A fixing plate is arranged on the outside of the cold air perforated tube, and a spring is connected between the fixing plate and the wind-blocking sleeve.

[0011] By adopting the above technical scheme, the wind-blocking sliding sleeve is coordinated with the cold air perforated tube. Since the cold air perforated tube is inserted into an opening at one end of the wind-blocking sliding sleeve, when the cold air output is large, the pressure is large and the wind-blocking sliding sleeve is pushed, so that the air holes are moved to the inside of the guide tube, and the guide tube is connected. At this time, the guide tube absorbs part of the cold air to reduce the initial air temperature. Through the cooperation of the spring and the fixed plate, the wind-blocking sliding sleeve is reset when the cold air volume is insufficient, so that the guide tube is closed and can no longer absorb the cold air, and all the cold air is used for secondary cooling.

[0012] The present invention is further configured such that the hot air outlet of the vortex tube is provided with a high-heat air outlet penetrating to the outside of the shell, and the air outlet direction of the high-heat air outlet is the same as the air outlet direction of the electric fan.

[0013] By adopting the above technical solution, the high-heat air outlet is set to guide the high-heat air outlet direction of the vortex tube, so that all the hot air of the equipment is discharged in the same direction, avoiding the hot air from being discharged to the air inlet, resulting in a high temperature in the air inlet environment.

[0014] The present invention is further configured such that the pressure air duct is a Laval nozzle structure.

[0015] By adopting the above technical solution, the Laval nozzle structure provided increases the air inlet velocity, thereby increasing the air inlet pressure of the vortex tube.

[0016] The present invention is further configured such that wind guide covers cooperating with the Venturi jet tube and the pressure air duct are respectively arranged on both sides of the first capillary fin group, and the airflow inlet and outlet ends of the fin arrangement direction of the first capillary fin group should be respectively aligned with the wind guide covers on both sides, so that the airflow can pass through the first capillary fin group from the wind guide cover on one side and enter the wind guide cover on the other side.

[0017] By adopting the above technical solution, the air guide hood is provided to guide the airflow of the equipment to pass through the first capillary fin group and continue to maintain the pressure, so that the pressure entering the pressure air duct is consistent with the output of the air pump, thereby avoiding air leakage.

[0018] The present invention is further configured such that an air inlet pipe penetrating to the outside of the shell is arranged on the outside of the air pump, and a one-way valve and a filter assembly are arranged on the outside of the air inlet pipe.

[0019] By adopting the above technical solution, the air inlet pipe is set to guide the air inlet direction, avoiding the air inlet direction toward the hot air exhaust, which will cause the initial air to be high in temperature, and the one-way valve and filter assembly are used to prevent backflow and debris from entering.

[0020] The present invention is further configured such that an air inlet cover plate is provided on one side of the shell close to the cold air perforated tube, and the air inlet cover plate is rotatably connected to a plurality of groups of the one-way air inlet plates, and the air inlet direction of the one-way air inlet plates is inside the shell.

[0021] By adopting the above technical solution, the air inlet cover plate cooperates with the one-way air inlet plate to prevent the cold air from escaping. When the cold air volume is insufficient, the electric fan drives the airflow to generate negative pressure, forcing the one-way air inlet plate to open, thereby introducing external airflow.

[0022] To sum up, the present invention pushes the pressurized gas into the Venturi jet tube and then into the wind guide cover through the arranged wind pump. After heat exchange with the first capillary fin group, the heated air passes through the pressure air duct and enters the vortex tube. The cold air separated in the vortex tube is dissipated to the air inlet of the electric fan, thereby cooling the air inlet of the electric fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a dual-source modular chilled water heat pump system of the present invention;

[0024] Figure 2 It is an overall schematic diagram of the present invention;

[0025] Figure 3 It is the external structure diagram of the present invention;

[0026] Figure 4 It is a partial schematic diagram of the present invention;

[0027] Figure 5 It is a schematic diagram of the wind-blocking sliding sleeve of the present invention;

[0028] Figure 6 It is a partial structural diagram of the present invention;

[0029] Figure 7 It is the internal structure diagram of the present invention;

[0030] Figure 8 It is an internal schematic diagram of the present invention;

[0031] Fig. 9 It is a schematic diagram of the cold air manifold of the present invention.

[0032] In the figure: 1, shell; 2, wind guide cover; 3, first capillary fin group; 4, air inlet cover plate; 5, high-temperature air outlet; 6, second capillary fin group; 7, one-way air inlet plate; 8, air inlet pipe; 9, air pump; 10, Venturi jet tube; 11, one-way pipe; 12, wind-blocking sleeve; 13, spring; 14, cold air perforated pipe; 15, electric fan; 16, vortex tube; 17, cold air manifold; 18, pressure air duct; 19, guide pipe; 20, air-cooled fin condenser; 21, four-way reversing valve; 22, compressor; 23, liquid storage tank; 24, first filter; 25, expansion valve; 26, second filter; 27, oil separator; 28, evaporator; 29, gas-liquid separator. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] The following describes an embodiment of the present invention based on its overall structure.

[0035] A dual-source modular chiller heat pump unit, such as Figure 4 , Figure 5 and Figure 7 As shown, it includes an evaporator 28, a compressor 22, an air-cooled finned condenser 20, a variable frequency axial flow fan, an expansion valve 25, a four-way reversing valve 21, a gas-liquid separator 29 and a liquid storage tank 23, a first filter 24, a second filter 26 and an oil separator 27. The air-cooled finned condenser 20, the oil separator 27, the gas-liquid separator 29 and the evaporator 28 are connected to the four-way reversing valve 21. The air-cooled finned condenser 20 includes a shell 1, a second capillary fin group 6 is arranged inside the shell 1, and a first capillary fin group 6 is arranged on the top of the second capillary fin group 6. 3. An air pump 9 is arranged inside the housing 1 at one side of the second capillary fin group 6, and a venturi jet tube 10 cooperating with the first capillary fin group 3 is arranged at the air outlet end of the air pump 9. A vortex tube 16 is arranged on the side of the housing 1 away from the venturi jet tube 10, and a pressure air duct 18 is connected between the vortex tube 16 and the first capillary fin group 3. An electric fan 15 is arranged at one end of the second capillary fin group 6, and the air outlet of the electric fan 15 faces the second capillary fin group 6. The cold air outlet of the vortex tube 16 is connected to a cold air manifold 17 extending to one side of the air inlet of the electric fan 15.

[0036] During processing, the capillary sizes of the second capillary fin group 6 and the first capillary fin group 3 and the sizes of the main pipe inlet and outlet pipes are adjusted according to the required models. During installation, the main pipe inlet and outlet are connected to the external pipelines accordingly. And according to the needs, the air inlet pipe 8 and the high-heat air outlet 5 are connected to other pipelines or directly exposed. The electric fan 15 and the air pump 9 are connected to the external circuit.

[0037] After installation, start operation, the high-temperature medium to be cooled enters the main pipe and enters the second capillary fin group 6 and the first capillary fin group 3 through the capillary tube, and the medium begins to exchange heat with the second capillary fin group 6 and the first capillary fin group 3. At this time, the air pump 9 and the electric fan 15 start to start, and the air pump pushes the pressure gas into the venturi jet tube 10 and then into the wind guide cover 2. After heat exchange with the first capillary fin group 3, the heated air passes through the pressure air duct 18 and enters the vortex tube 16. The cold air separated in the vortex tube 16 is emitted to the air inlet of the electric fan 15, thereby cooling the air inlet of the electric fan 15. The electric fan 15 mixes the normal temperature and cold air and drives the airflow through the second capillary fin group 6, exchanges heat with the second capillary fin group 6, and achieves cooling.

[0038] Among them, the Venturi jet tube is a common fluid mechanics device, and its working principle is based on the jet principle. It mainly consists of a nozzle and a diffuser. When the high-speed fluid enters the ejector through the nozzle, due to the small channel of the nozzle, the fluid velocity increases rapidly, forming a high-speed jet. At the same time, the high-speed jet mixes with the ambient gas. Next, the fluid passes through the diffuser, which expands the cross-sectional area of ​​the jet, thereby reducing the air flow velocity.

[0039] Optionally, the air pump 9 in this device is replaced with a water pump, and a water collecting tray is added at the bottom of the first capillary fin group 3, and a water baffle is set at the pressure air duct 18 to achieve dry and wet separation. In this solution, the fluid is mixed with cold air when passing through the Venturi jet tube to form a cold water flow. After the water and gas are diverted, the cold air enters the pressure air duct 18 for subsequent cooling. It is worth mentioning that no matter which solution is used, the Venturi jet tube is used to reduce the flow velocity to avoid excessive initial velocity from damaging the first capillary fin group 3.

[0040] The venturi jet tube uses the increase in velocity and decrease in pressure of a fluid passing through a shrinking nozzle. When a high-speed fluid passes through the nozzle, its velocity increases rapidly, forming a high-speed jet. This high-speed jet mixes with the ambient gas and generates a negative pressure area under the action of the venturi effect, thereby generating negative pressure locally and then sucking in ambient gas. The local part refers to the middle part of the variable diameter. The one-way tube 11 connected in the middle can guide the vacuum negative pressure in a direction, and the guide tube 19 can be used to draw away the cold air emitted by the cold air perforated tube 14 and mix it into the main passing medium of the venturi jet tube.

[0041] Among them, the vortex tube is a device that can efficiently produce low-temperature gas. The working principle of the vortex tube is based on the vortex separation phenomenon of high-speed airflow. When the compressed air enters the vortex chamber, the airflow rotates at high speed and flows to the hot gas outlet of the vortex tube. Part of the airflow flows out through the control valve, and after the remaining gas is blocked, it rotates in the opposite direction at the same speed in the inner circle of the original airflow and flows to the cold air end of the vortex tube. In this process, the two airflows exchange heat, the inner ring airflow becomes very cold, and flows out from the cold air end of the vortex tube; the outer ring airflow becomes very hot and flows out from the hot air end of the vortex tube.

[0042] In the air-cooled fin condenser, the vortex tube is used to separate the cold and hot air. After the airflow is introduced into the vortex tube 16 through the pressure air duct 18, the vortex tube 16 can separate the airflow into cold air and hot air. The cold air is guided to the air inlet side of the electric fan 15 through the cold air manifold 17 for secondary cooling; while the hot air is discharged out of the equipment through the high hot air outlet 5. This method of separating cold and hot air not only improves the heat dissipation efficiency of the condenser, but also avoids the influence of hot air on the air inlet environment.

[0043] On the basis of the above structure, in this embodiment, a guide pipe 19 is provided on one side of the cold air perforated pipe 14, and the negative pressure of the venturi jet pipe 10 is guided by the provided guide pipe 19. A one-way pipe 11 is connected between the guide pipe 19 and the venturi jet pipe 10, and the one-way pipe 11 avoids the situation of air flow diversion. The guide pipe 19 is L-shaped, and its horizontal section extends below the cold air perforated pipe 14. The horizontal section is provided with multiple groups of through holes. The multiple groups of through holes cooperate with the negative pressure to suck the cold air emitted from the cold air perforated pipe 14 into the guide pipe 19 and then into the venturi jet pipe 10 for mixing, thereby reducing the initial air temperature.

[0044] On the basis of the above structure, in this embodiment, a wind-blocking sleeve 12 that penetrates the guide tube 19 is arranged on the outside of the cold air perforated tube 14, and the wind-blocking sleeve 12 is provided with a wind-passing hole. After the wind-passing hole moves to the outside of the guide tube 19, the inside of the guide tube 19 can be closed and unable to circulate. The wind-blocking sleeve 12 cooperates with the cold air perforated tube 14. Since the cold air perforated tube 14 is inserted into an opening at one end of the wind-blocking sleeve 12, when the cold air output is large, the pressure is large and the wind-blocking sleeve 12 is pushed, thereby causing the wind-passing hole to move to the inside of the guide tube 19, and the guide tube 19 is connected. At this time, the guide tube 19 absorbs a part of the cold air to reduce the initial air intake temperature, and a fixing plate is arranged on the outside of the cold air perforated tube 14, and a spring 13 is connected between the fixing plate and the wind-blocking sleeve 12. Through the cooperation of the spring 13 and the fixing plate, the wind-blocking sleeve 12 is reset when the cold air volume is insufficient, so that the guide tube 19 is closed and cannot continue to absorb the cold air, and all the cold air is used for secondary cooling.

[0045] On the basis of the above structure, in the present embodiment, the hot air outlet of the vortex tube 16 is provided with a high hot air outlet 5 which penetrates to the outside of the outer shell 1. The air outlet direction of the high hot air outlet 5 is the same as that of the electric fan 15. The high hot air outlet is provided to guide the high hot air outlet direction of the vortex tube 16 so that all hot air of the equipment is discharged in the same direction, thereby preventing the hot air from being discharged to the air inlet, resulting in a high temperature in the air inlet environment.

[0046] On the basis of the above structure, in this embodiment, the pressure air duct 18 is a Laval nozzle structure, and the Laval nozzle structure is provided to increase the inlet air velocity, thereby increasing the inlet air pressure of the vortex tube 16 .

[0047] On the basis of the above structure, in this embodiment, air guide covers 2 cooperating with the Venturi jet tube 10 and the pressure air duct 18 are respectively arranged on both sides of the first capillary fin group 3. The airflow inlet and outlet ends of the fin arrangement direction of the first capillary fin group 3 should be respectively aligned with the air guide covers 2 on both sides, so that the airflow can pass through the first capillary fin group 3 from one side to the air guide cover 2 on the other side. The airflow of the equipment is guided to pass through the first capillary fin group 3 and continue to maintain the pressure through the arranged air guide cover 2, so that the pressure entering the pressure air duct 18 is consistent with the output of the air pump 9, thereby avoiding air escape.

[0048] On the basis of the above structure, in this embodiment, an air inlet pipe 8 is provided on the outside of the air pump 9 and penetrates to the outside of the outer shell 1. The air inlet pipe 8 is provided to guide the air inlet direction to avoid the air inlet direction being toward the hot air exhaust, thereby causing the initial air to have a high temperature. A one-way valve and a filter assembly are provided on the outside of the air inlet pipe 8, and the one-way valve and the filter assembly are used to prevent backflow and the entry of debris.

[0049] On the basis of the above structure, in this embodiment, an air inlet cover plate 4 is provided on the side of the outer shell 1 close to the cold air perforated tube 14. The air inlet cover plate 4 is rotatably connected to multiple groups of one-way air inlet plates 7. The air inlet direction of the one-way air inlet plates 7 is the inside of the outer shell 1. The air inlet cover plate 4 cooperates with the one-way air inlet plates 7 to prevent cold air from escaping. When the amount of cold air is insufficient, the electric fan 15 drives the airflow to generate negative pressure, forcing the one-way air inlet plates 7 to open, thereby introducing external airflow.

[0050] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A dual-source modular chilled water heat pump unit, comprising an evaporator (28), a compressor (22), an air-cooled finned condenser (20), a variable frequency axial flow fan, an expansion valve (25), a four-way reversing valve (21), a gas-liquid separator (29) and a liquid reservoir (23), a first filter (24), a second filter (26) and an oil separator (27), wherein the air-cooled finned condenser (20), the oil separator (27), the gas-liquid separator (29) and the evaporator (28) are connected to the four-way reversing valve (21), and characterized in that: The air-cooled fin-type condenser (20) comprises a shell (1), a second capillary fin group (6) is arranged inside the shell (1), a first capillary fin group (3) is arranged on the top of the second capillary fin group (6), a wind pump (9) is arranged inside the shell (1) on one side of the second capillary fin group (6), a venturi jet tube (10) cooperating with the first capillary fin group (3) is arranged at the air outlet end of the wind pump (9), a vortex tube (16) is arranged on the side of the shell (1) away from the venturi jet tube (10), a pressure air duct (18) is connected between the vortex tube (16) and the first capillary fin group (3), and an electric fan (15) is arranged at one end of the second capillary fin group (6), the air outlet of the electric fan (15) facing the Towards the second capillary fin group (6), the cold air outlet of the vortex tube (16) is connected to a cold air manifold (17) extending to one side of the air inlet of the electric fan (15), a guide tube (19) is provided on one side of the cold air perforated tube (14), and the other side of the cold air perforated tube (14) is provided on the cold air manifold (17), a one-way tube (11) is connected between the guide tube (19) and the Venturi jet tube (10), the guide tube (19) is L-shaped, and its transverse section extends to the bottom of the cold air perforated tube (14), and the transverse section is provided with a plurality of groups of through holes, and an air inlet cover plate (4) is provided on the side of the outer shell (1) close to the cold air perforated tube (14), and the air inlet cover plate (4) is rotatably connected to a plurality of groups of one-way air inlet plates (7), and the air inlet direction of the one-way air inlet plates (7) is the inside of the outer shell (1).

2. A dual-source modular chiller heat pump unit according to claim 1, characterized in that: The outer side of the cold air perforated tube (14) is provided with a wind-blocking sleeve (12) which passes through the guide tube (19); the wind-blocking sleeve (12) is provided with a wind hole; after the wind hole is moved to the outer side of the guide tube (19), the interior of the guide tube (19) can be closed and unable to circulate; the outer side of the cold air perforated tube (14) is provided with a fixing plate; a spring (13) is connected between the fixing plate and the wind-blocking sleeve (12).

3. A dual-source modular chiller heat pump unit according to claim 1, characterized in that: The hot air outlet of the vortex tube (16) is provided with a high-heat air outlet (5) penetrating to the outside of the housing (1), and the air outlet direction of the high-heat air outlet (5) is the same as the air outlet direction of the electric fan (15).

4. A dual-source modular chiller heat pump unit according to claim 1, characterized in that: The pressure air duct (18) is a Laval nozzle structure.

5. The dual-source modular chiller heat pump unit according to claim 1, characterized in that: Air guide covers (2) cooperating with the Venturi jet tube (10) and the pressure air duct (18) are respectively arranged on both sides of the first capillary fin group (3); the airflow inlet and outlet ends of the first capillary fin group (3) in the fin arrangement direction should be aligned with the air guide covers (2) on both sides, so that the airflow passes through the first capillary fin group (3) from the air guide cover (2) on one side and enters the air guide cover (2) on the other side.

6. A dual-source modular chiller heat pump unit according to claim 1, characterized in that: An air inlet pipe (8) is arranged on the outside of the air pump (9) and penetrates to the outside of the housing (1), and a one-way valve and a filter assembly are arranged on the outside of the air inlet pipe (8).

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