Cascade high temperature heat pump system

Abstract

The present invention belongs to the technical field of heat pumps, and specifically relates to a cascade high-temperature heat pump system, including a primary heat pump system and a secondary heat pump system, wherein the primary heat pump system is provided with a primary output pipe and a primary input pipe. The cascade high-temperature heat pump system of the present invention, when high temperature is not required, only inputs and outputs the medium to be heated through the primary output pipe and the primary input pipe of the primary heat pump system, and when high temperature is required, the medium can be heated through the primary heat pump system, and then flow to the secondary input pipe through the primary output pipe in conjunction with the first regulating guide pipe, thereby entering the secondary heat pump system for secondary heating so as to stably reach the required high temperature, and the primary heat pump system and the secondary heat pump system can be closed by the first control valve and the second control valve to form two independent individuals, so that various individual operations do not affect each other, and can be used separately or can work simultaneously, so as to maximize the resource allocation and utilization.

Description

Technical Field

[0001] The invention belongs to the technical field of heat pumps, and in particular relates to a cascade high-temperature heat pump system. Background Art

[0002] Heat pumps, also known as air-to-air heat pumps, absorb low-temperature heat from the air, gasify it through a fluorine medium, compress it through a compressor, increase the pressure and temperature, and then convert it through a heat exchanger to heat water or air. The compressed high-temperature heat energy is used to heat the water. Heat pump water heaters overcome the shortcomings of solar water heaters that rely on sunlight for heating and are inconvenient to install.

[0003] Ordinary heat pump systems cannot meet the actual heating needs, while cascade heat pump systems can be used to provide high-temperature hot water. However, cascade heat pump systems generally include a high-pressure refrigerant circulation loop and a low-pressure refrigerant circulation loop, which exchange heat through a shared intermediate heat exchanger to achieve the purpose of providing high-temperature hot water. However, existing cascade heat pump systems can only operate simultaneously and cannot operate alone, cannot meet low-temperature requirements, and cannot maximize resource allocation and utilization. Summary of the invention

[0004] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a cascade high-temperature heat pump system, which can be used alone or in pairs to work simultaneously, so as to maximize the resource allocation and utilization.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cascade high-temperature heat pump system, including a primary heat pump system and a secondary heat pump system, the primary heat pump system is provided with a primary output pipe and a primary input pipe, the secondary heat pump system is provided with a secondary output pipe and a secondary input pipe, a first regulating guide pipe is provided between the primary output pipe and the secondary input pipe, the connecting ends of the first regulating guide pipe, the primary output pipe and the secondary input pipe are respectively provided with a first control valve, a second regulating guide pipe is provided between the secondary output pipe and the primary input pipe, and the connecting ends of the second regulating guide pipe, the secondary output pipe and the primary input pipe are respectively provided with a second control valve.

[0006] The first-level output pipe is installed with a hot water tank, and the output of the second-level output pipe is installed with a hot air tank. A flow control component is connected between the first-level output pipe and the second-level output pipe. The flow control component, the first regulating guide pipe and the second regulating guide pipe are arranged in sequence along the direction from the hot water tank to the first-level heat pump system; the flow control component includes a connecting pipe and two opening and closing valves, and the two opening and closing valves are respectively installed at both ends of the connecting pipe.

[0007] The hot water tank and the hot gas tank are both provided with a plurality of output transmission pipes.

[0008] A first water pump connected to the primary output pipe is installed in the hot water tank, and a first air pump connected to the secondary output pipe is installed in the hot air tank.

[0009] The primary heat pump system comprises a primary compressor, a primary plate heat exchanger, a primary condenser and a primary evaporator, the output port of the primary compressor is provided with a first transmission pipe, the first transmission pipe is connected with the inlet ports of the primary plate heat exchanger and the primary condenser respectively, and a control valve is installed at the connection with the primary plate heat exchanger and the primary condenser, the input port of the primary evaporator is provided with a first inlet pipe, the first inlet pipe is connected with the output ports of the primary plate heat exchanger and the primary condenser and a control valve is installed at the connection, the input port of the primary evaporator is connected with the output ports of the primary plate heat exchanger and the primary condenser respectively, and a control valve is installed at the connection;

[0010] The first-stage plate heat exchanger is equipped with a first heating input pipe and a first heating output pipe, and the first-stage condenser is equipped with a second heating input pipe and a second heating output pipe. The first heating input pipe is connected to the second heating input pipe, and a control valve is installed at the connection. The second heating output pipe is respectively connected to the first heating input pipe and the first heating output pipe, and a control valve is installed at the connection.

[0011] A first insulation tube is sleeved on the first transmission tube, and a first gap is defined between the inner wall of the first insulation tube and the outer wall of the first transmission tube; a second insulation tube is sleeved on the first heating output tube, and a second gap is defined between the second insulation tube and the first heating output tube, and a first insulation hollow connecting plate is provided between the first gap and the second gap.

[0012] The secondary heat pump system comprises a secondary compressor, a secondary plate heat exchanger, a secondary condenser and a secondary evaporator, the output port of the secondary compressor is provided with a second transmission pipe, the second transmission pipe is connected with the inlet end of the secondary plate heat exchanger and the secondary condenser respectively, and a control valve is installed at the connection with the secondary plate heat exchanger and the secondary condenser, the input port of the secondary evaporator is provided with a second inlet pipe, the second inlet pipe is connected with the output end of the secondary plate heat exchanger and the secondary condenser and a control valve is installed at the connection, the input end of the secondary evaporator is connected with the output end of the secondary plate heat exchanger and the secondary condenser respectively, and a control valve is installed at the connection;

[0013] The secondary plate heat exchanger is equipped with a third heating input pipe and a third heating output pipe, and the secondary condenser is equipped with a fourth heating input pipe and a fourth heating output pipe. The third heating input pipe is connected to the fourth heating input pipe, and a control valve is installed at the connection. The fourth heating output pipe is respectively connected to the third heating input pipe and the third heating output pipe, and a control valve is installed at the connection.

[0014] A third insulation tube is sleeved on the second transmission tube, and a first gap is defined between the inner wall of the third insulation tube and the outer wall of the second transmission tube; a fourth insulation tube is sleeved on the third heating output tube, and a second gap is defined between the fourth insulation tube and the third heating output tube, and a second insulation hollow connecting plate is provided to connect the first gap and the second gap.

[0015] The heat pump system also includes a support frame, the primary heat pump system and the secondary heat pump system are arranged side by side in the support frame, and a heat insulation board is installed outside the support frame.

[0016] The primary heat pump system and the secondary heat pump system are both provided with heat dissipation fans.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The cascade high-temperature heat pump system of the present invention, when high temperature is not required, only inputs and outputs the medium to be heated through the primary output pipe and the primary input pipe of the primary heat pump system, and when high temperature is required, the medium can be heated through the primary heat pump system, and then flow to the secondary input pipe through the primary output pipe in cooperation with the first regulating guide pipe, thereby entering the secondary heat pump system for secondary heating so as to stably reach the required high temperature, and the primary heat pump system and the secondary heat pump system can be closed by the first control valve and the second control valve to form two independent individuals, so that various individual operations do not affect each other, and can be used separately or can work simultaneously, so as to maximize the resource allocation and utilization.

[0019] 2. The cascade high-temperature heat pump system of the present invention, its primary heat pump system and secondary heat pump system can heat water and air separately by cooperating with a hot water tank and a hot air tank, thereby achieving simultaneous heating of the two media, increasing utilization efficiency, being able to adapt to different needs, and increasing the scope of practical application.

[0020] 3. In the cascade high-temperature heat pump system of the present invention, when water needs to be heated to a high temperature, the air in the secondary heat pump system is first emptied through the first vacuum pump in cooperation with the secondary output pipe, and at the same time, the three-way control valve of the water pipe is opened to connect the water pipe with the primary input pipe, so that the water in the hot water tank flows back through the primary input pipe to the primary heat pump system for secondary heating to achieve a high temperature effect. After the air in the secondary heat pump system is emptied, the three-way control valve of the water pipe is closed and the primary input pipe is connected to an external water source, and then the primary heat pump system is used for primary heating, and then the water is transferred through the primary output pipe in cooperation with the secondary output pipe to the secondary heat pump system for secondary heating, and then flows back to the hot water tank through the circulation control component in cooperation with the primary output pipe for next use. When heated to a high temperature, the water in the primary heat pump system is first emptied through the first water pump in cooperation with the primary output pipe, and at the same time, the three-way control valve of the air guide pipe is opened to connect the air guide pipe with the secondary input pipe, so that the water in the hot air box flows back through the secondary input pipe to the secondary heat pump system for secondary heating to achieve a high temperature effect. After the water in the primary heat pump system is emptied, the three-way control valve of the air guide pipe is closed to connect the secondary input pipe to the external air, and then the secondary heat pump system is used for primary heating, and then the water is transmitted through the secondary output pipe in cooperation with the primary output pipe to the primary heat pump system for secondary heating, and then flows back to the hot air box through the flow control component in cooperation with the secondary output pipe for next use, thereby achieving independent work while also being able to quickly switch to single medium heating.

[0021] 4. In the cascade high-temperature heat pump system of the present invention, when water below 60 degrees is needed, the coolant flows through the primary compressor, the primary condenser and the primary evaporator in sequence and then returns to the primary compressor. At the same time, it is controlled by various control valves so that the water enters the second heating input pipe through the primary input pipe, then enters the primary condenser from the second heating input pipe for heating, and then is discharged through the second heating output pipe and placed in the primary output pipe for output; and when water at 60 degrees is needed, the coolant flows through the primary compressor, the primary plate heat exchanger and the primary evaporator in sequence and then returns to the primary compressor. At the same time, it is controlled by various control valves so that the water enters the first heating input pipe through the primary input pipe, then enters the first plate heat exchanger from the first heating input pipe for heating, and the efficient heat exchange of the primary plate heat exchanger is realized. The water temperature is raised to 60 degrees by the exchange efficiency, and then discharged through the first heating output pipe and placed in the first output pipe for output; when water above 60 degrees is needed, the coolant flows through the first compressor, the first condenser, the first plate heat exchanger and the first evaporator in sequence and then returns to the first compressor. At the same time, it is controlled by various control valves. The water enters the second heating input pipe through the first input pipe, and then enters the first condenser from the second heating input pipe for heating, and then is discharged through the second heating output pipe and placed in the first heating input pipe, and then enters the first plate heat exchanger from the first heating input pipe for heating again, and then is discharged through the first heating output pipe and placed in the first output pipe for output. The water temperature is raised to above 60 degrees through secondary heating, so that a single heat pump system can heat water to two temperatures.

[0022] 5. In the cascade high-temperature heat pump system of the present invention, when air below 60 degrees is needed, its coolant flows through the secondary compressor, the secondary condenser and the secondary evaporator in sequence and then returns to the secondary compressor. At the same time, it is controlled by various control valves, and the air enters the fourth heating input pipe through the secondary input pipe, and then enters the secondary condenser from the fourth heating input pipe for heating, and then is discharged through the fourth heating output pipe and placed in the secondary output pipe for output; and when air at 60 degrees is needed, its coolant flows through the secondary compressor, the secondary plate heat exchanger and the secondary evaporator in sequence and then returns to the secondary compressor. At the same time, it is controlled by various control valves, and the air enters the third heating input pipe through the secondary input pipe, and then enters the secondary plate heat exchanger from the third heating input pipe for heating. The efficient heat exchange of the secondary plate heat exchanger The air temperature is raised to 60 degrees by the exchange efficiency, and then discharged through the third heating output pipe and placed in the secondary output pipe for output; when air above 60 degrees is needed, its coolant flows through the secondary compressor, the secondary condenser, the secondary plate heat exchanger and the secondary evaporator in sequence and then returns to the secondary compressor. At the same time, it is controlled by various control valves. The air enters the fourth heating input pipe through the secondary input pipe, and then enters the secondary condenser from the fourth heating input pipe for heating, and then is discharged through the fourth heating output pipe and placed in the third heating input pipe, and then enters the secondary plate heat exchanger from the third heating input pipe for heating again, and then is discharged through the third heating output pipe and placed in the secondary output pipe for output. The air temperature is raised to above 60 degrees through secondary heating, so that a single heat pump system can heat the air to two temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the heat pump system of the present invention;

[0024] Figure 2 Schematic diagram of the internal structure of the heat pump system of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a primary heat pump system of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a primary heat pump system of the present invention;

[0027] Figure 5 is a schematic diagram of the cross-sectional structure of the first transmission tube of the present invention;

[0028] Figure 6 is a schematic cross-sectional structure diagram of the first heating output tube of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the first thermal insulation pipe and the second thermal insulation pipe of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the two-stage heat pump system of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the two-stage heat pump system of the present invention;

[0032] Fig.10 is a schematic diagram of the cross-sectional structure of the second transmission tube of the present invention;

[0033] Fig.11 is a schematic cross-sectional structure diagram of the third heating output tube of the present invention;

[0034] Fig.12 It is a schematic diagram of the structure of the third thermal insulation pipe and the fourth thermal insulation pipe of the present invention.

[0035] Markings in the figure: 1, primary heat pump system; 2, secondary heat pump system; 3, primary output pipe; 4, primary input pipe; 5, secondary output pipe; 6, secondary input pipe; 7, first regulating guide pipe; 8, second regulating guide pipe; 9, hot water tank; 10, hot air tank; 11, output transmission pipe; 12, primary compressor; 13, primary plate heat exchanger; 14, primary condenser; 15, primary evaporator; 16, first transmission pipe; 17, first heating input pipe; 18, first heating output pipe; 19, second heating input pipe; 20, second heating output pipe; 21, first insulation pipe; 22, first Gap; 23, second insulation pipe; 24, second gap; 25, first insulation hollow connecting plate; 26, secondary compressor; 27, secondary plate heat exchanger; 28, secondary condenser; 29, secondary evaporator; 30, second transmission pipe; 31, third heating input pipe; 32, third heating output pipe; 33, fourth heating input pipe; 34, fourth heating output pipe; 35, third insulation pipe; 36, first gap; 37, fourth insulation pipe; 38, second gap; 39, second insulation hollow connecting plate; 40, support frame; 41, insulation board; 42, cooling fan; 43, flow control component. DETAILED DESCRIPTION

[0036] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0037] like Figure 1-Figure 12As shown, this embodiment provides a cascade high-temperature heat pump system, including a primary heat pump system 1 and a secondary heat pump system 2, the primary heat pump system 1 is provided with a primary output pipe 3 and a primary input pipe 4, the secondary heat pump system 2 is provided with a secondary output pipe 5 and a secondary input pipe 6, a first regulating guide pipe 7 is provided between the primary output pipe 3 and the secondary input pipe 6, the connecting ends of the first regulating guide pipe 7 and the primary output pipe 3 and the secondary input pipe 6 are respectively provided with first control valves, a second regulating guide pipe 8 is provided between the secondary output pipe 5 and the primary input pipe 4, and the connecting ends of the second regulating guide pipe 8 and the secondary output pipe 5 and the primary input pipe 4 are respectively provided with second control valves. When high temperature is not required, the medium to be heated is input and output only through the primary output pipe 3 and the primary input pipe 4 of the primary heat pump system 1. When high temperature is required, the medium can be heated through the primary heat pump system 1, and then flow to the secondary input pipe 6 through the primary output pipe 3 in cooperation with the first regulating guide pipe 7, thereby entering the secondary heat pump system 2 for secondary heating so as to stably reach the required high temperature. The primary heat pump system 1 and the secondary heat pump system 2 can be closed by the first control valve and the second control valve to form two independent entities, so that various individual operations do not affect each other, and can be used separately or both can work at the same time, thereby maximizing resource allocation and utilization.

[0038] Furthermore, a hot water tank 9 is installed at the primary output pipe 3, a hot air tank 10 is installed at the output of the secondary output pipe 5, and a flow control component 43 is connected between the primary output pipe 3 and the secondary output pipe 5. The flow control component 43, the first regulating guide pipe 7 and the second regulating guide pipe 8 are arranged in sequence along the direction of the hot water tank 9 toward the primary heat pump system 1; the flow control component 43 includes a connecting pipe and two opening and closing valves, and the two opening and closing valves are respectively installed at both ends of the connecting pipe. The primary heat pump system 1 and the secondary heat pump system 2 can heat water and air separately by cooperating with the hot water tank 9 and the hot air tank 10, so as to achieve simultaneous heating of the two media, increase the use efficiency, adapt to different needs, and increase the practical scope. Specifically, a first water pump connected to the primary output pipe 3 and a water pipe connected to the primary input pipe 4 are installed in the hot water tank 9, and a three-way control valve is provided at the connection between the water pipe and the primary input pipe 4. A first air pump connected to the secondary output pipe 5 and an air pipe connected to the secondary input pipe 6 are installed in the hot air box 10, and a three-way control valve is provided at the connection between the air pipe and the secondary input pipe 6. When the water needs to be heated to a high temperature, the air in the secondary heat pump system 2 is first evacuated through the first vacuum pump in cooperation with the secondary output pipe 5, and at the same time, the three-way control valve of the water pipe is opened to connect the water pipe with the primary input pipe 4, so that the water in the hot water tank 9 flows back through the primary input pipe 4 to the primary heat pump system 1 for secondary heating to achieve a high temperature effect. After the air in the secondary heat pump system 2 is evacuated, the three-way control valve of the water pipe is closed to connect the primary input pipe 4 to the external water source, and then the primary heat pump system 1 is used for primary heating, and then the water is transferred to the secondary heat pump system 2 through the primary output pipe 3 in cooperation with the secondary input pipe 6 for secondary heating, and then flows back to the hot water tank 9 through the circulation control component 43 in cooperation with the primary output pipe 3 for next use. Specifically, the water flow direction is the primary input pipe 4, the primary heat pump system 1, the primary output pipe 3, the secondary input pipe 6, the secondary heat pump system 2, the secondary output pipe 5, the circulation control component 43 and the hot water tank 9 in sequence;

[0039] When the air needs to be heated to a high temperature, the water in the primary heat pump system 1 is first emptied through the first water pump in cooperation with the primary output pipe 3, and at the same time, the three-way control valve of the air guide pipe is opened to connect the air guide pipe with the secondary input pipe 6, so that the water in the hot air box 10 flows back through the secondary input pipe 6 to the secondary heat pump system 2 for secondary heating to achieve a high temperature effect. After the water in the primary heat pump system 1 is emptied, the three-way control valve of the air guide pipe is closed to connect the secondary input pipe 6 to the external air, and then the primary heating is carried out through the secondary heat pump system 2, and then the air is transferred to the primary heat pump system 1 through the secondary output pipe 5 in cooperation with the primary output pipe 3 for secondary heating, and then the air is returned to the hot air box 10 through the flow control component 43 in cooperation with the secondary input pipe 6 for the next use, so that the air can be quickly converted to single medium heating while working independently. Specifically, the air flow direction is the secondary input pipe 6, the secondary heat pump system 2, the secondary output pipe 5, the primary input pipe 4, the primary heat pump system 1, the primary output pipe 3, the flow control component 43 and the hot air box 10.

[0040] Furthermore, the hot water tank 9 and the hot gas tank 10 are both provided with a plurality of output transmission pipes 11. The hot water is transported to the outside through the plurality of output transmission pipes 11.

[0041] Furthermore, the primary heat pump system 1 includes a primary compressor 12, a primary plate heat exchanger 13, a primary condenser 14 and a primary evaporator 15. The output port of the primary compressor 12 is provided with a first transmission pipe 16, which is connected to the inlet ends of the primary plate heat exchanger 13 and the primary condenser 14, respectively, and a control valve is installed at the connection with the primary plate heat exchanger 13 and the primary condenser 14. The input port of the primary evaporator 15 is provided with a first inlet pipe, which is connected to the output ends of the primary plate heat exchanger 13 and the primary condenser 14, and a control valve is installed at the connection. The input end of the primary evaporator 15 is provided with a first inlet pipe, which is connected to the output ends of the primary plate heat exchanger 13 and the primary condenser 14, respectively, and a control valve is installed at the connection. The output end of the condenser 14 is connected, and the output end of the first-stage condenser 14 is connected to the input end of the first-stage plate heat exchanger 13, and control valves are installed at the connections; specifically, the first-stage plate heat exchanger 13 is equipped with a first heating input pipe 17 and a first heating output pipe 18, and the first-stage condenser 14 is equipped with a second heating input pipe 19 and a second heating output pipe 20, the first heating input pipe 17 is connected to the second heating input pipe 19, and control valves are installed at the connections, the second heating output pipe 20 is connected to the first heating input pipe 17 and the first heating output pipe 18 respectively, and control valves are installed at the connections, and the first heating output pipe 18 is connected to the first-stage output pipe 3.When water below 60 degrees is needed, the coolant flows through the primary compressor 12, the primary condenser 14 and the primary evaporator 15 in sequence and then returns to the primary compressor 12. At the same time, it is controlled by various control valves, and the water enters the second heating input pipe 19 through the primary input pipe 4, and then enters the primary condenser 14 from the second heating input pipe 19 for heating, and then is discharged through the second heating output pipe 20 and placed in the primary output pipe 3 for output; and when water at 60 degrees is needed, the coolant flows through the primary compressor 12, the primary plate heat exchanger 13 and the primary evaporator 15 in sequence and then returns to the primary compressor 12. At the same time, it is controlled by various control valves, and the water enters the first heating input pipe 17 through the primary input pipe 4, and then enters the primary plate heat exchanger 13 from the first heating input pipe 17 for heating. The water temperature is reduced by the high efficiency heat exchange efficiency of the primary plate heat exchanger 13. The water temperature is raised to 60 degrees, and then discharged through the first heating output pipe 18 and placed in the primary output pipe 3 for output; when water above 60 degrees is needed, the coolant flows through the primary compressor 12, the primary condenser 14, the primary plate heat exchanger 13 and the primary evaporator 15 in sequence and then returns to the primary compressor 12. At the same time, it is controlled by various control valves, and the water enters the second heating input pipe 19 through the primary input pipe 4, and then enters the primary condenser 14 from the second heating input pipe 19 for heating, and then is discharged through the second heating output pipe 20 and placed in the first heating input pipe 17, and then enters the primary plate heat exchanger 13 from the first heating input pipe 17 for heating again, and then is discharged through the first heating output pipe 18 and placed in the primary output pipe 3 for output. The water temperature is raised to above 60 degrees through secondary heating, so that a single heat pump system can heat water to two temperatures.

[0042] Furthermore, a first heat preservation pipe 21 is sleeved on the first transmission pipe 16, and a first gap 22 is provided between the inner wall of the first heat preservation pipe 21 and the outer wall of the first transmission pipe 16; a second heat preservation pipe 23 is sleeved on the first heating output pipe 18, and a second gap 24 is provided between the second heat preservation pipe 23 and the first heating output pipe 18, and a first heat preservation hollow connecting plate 25 is provided between the first gap 22 and the second gap 24. The first heat preservation pipe 21 cooperates with the first gap 22 to insulate the first transmission pipe 16, and the second heat preservation pipe 23 cooperates with the second gap 24 to insulate the first heating output pipe 18. The first transmission pipe 16 will emit heat energy after long-term use, so the heat energy will be placed in the first gap 22, and flow through the first heat preservation hollow connecting plate 25 to be placed in the second gap 24, so as to insulate the first heating output pipe 18.

[0043] Further, the secondary heat pump system 2 includes a secondary compressor 26, a secondary plate heat exchanger 27, a secondary condenser 28 and a secondary evaporator 29. The output port of the secondary compressor 26 is equipped with a second transmission pipe 30, and the second transmission pipe 30 is connected to the inlet end of the secondary plate heat exchanger 27 and the secondary condenser 28, respectively, and a control valve is installed at the connection with the secondary plate heat exchanger 27 and the secondary condenser 28. The input port of the secondary evaporator 29 is equipped with a second inlet pipe, and the second inlet pipe is connected to the output end of the secondary plate heat exchanger 27 and the secondary condenser 28, and a control valve is installed at the connection. The input end of the secondary evaporator 29 is connected to the secondary plate heat exchanger 27 and the secondary condenser 28, respectively. The output end of the secondary condenser 28 is connected, and the output end of the secondary condenser 28 is connected with the secondary plate heat exchanger 27, and control valves are installed at the connections; specifically, the secondary plate heat exchanger 27 is equipped with a third heating input pipe 31 and a third heating output pipe 32, and the secondary condenser 28 is equipped with a fourth heating input pipe 33 and a fourth heating output pipe 34, the third heating input pipe 31 is connected with the fourth heating input pipe 33, and control valves are installed at the connections, the fourth heating output pipe 34 is connected with the third heating input pipe 31 and the third heating output pipe 32 respectively, and control valves are installed at the connections, and the third heating output pipe 32 is connected with the secondary output pipe 5.When air below 60 degrees is needed, the coolant flows through the secondary compressor 26, the secondary condenser 28 and the secondary evaporator 29 in sequence and then returns to the secondary compressor 26. At the same time, it is controlled by various control valves, and the air enters the fourth heating input pipe 33 through the secondary input pipe 6, and then enters the secondary condenser 28 from the fourth heating input pipe 33 for heating, and then is discharged through the fourth heating output pipe 34 and placed in the secondary output pipe 5 for output; and when air at 60 degrees is needed, the coolant flows through the secondary compressor 26, the secondary plate heat exchanger 27 and the secondary evaporator 29 in sequence and then returns to the secondary compressor 26. At the same time, it is controlled by various control valves, and the air enters the third heating input pipe 31 through the secondary input pipe 6, and then enters the secondary plate heat exchanger 27 from the third heating input pipe 31 for heating. The air is heated by the high efficiency heat exchange of the secondary plate heat exchanger 27. The temperature is raised to 60 degrees, and then discharged through the third heating output pipe 32 and placed in the secondary output pipe 5 for output; when air above 60 degrees is needed, the coolant flows through the secondary compressor 26, the secondary condenser 28, the secondary plate heat exchanger 27 and the secondary evaporator 29 in sequence and then returns to the secondary compressor 26. At the same time, it is controlled by various control valves, and the air enters the fourth heating input pipe 33 through the secondary input pipe 6, and then enters the secondary condenser 28 from the fourth heating input pipe 33 for heating, and then is discharged through the fourth heating output pipe 34 and placed in the third heating input pipe 31, and then enters the secondary plate heat exchanger 27 from the third heating input pipe 31 for heating again, and then is discharged through the third heating output pipe 32 and placed in the secondary output pipe 5 for output. The air temperature is raised to above 60 degrees through secondary heating, so that a single heat pump system can heat the air to two temperatures.

[0044] Furthermore, a third heat preservation tube 35 is sleeved on the second transmission tube 30, and a first gap 36 is provided between the inner wall of the third heat preservation tube 35 and the outer wall of the second transmission tube 30; a fourth heat preservation tube 37 is sleeved on the third heating output tube 32, and a second gap 38 is provided between the fourth heat preservation tube 37 and the third heating output tube 32, and a second heat preservation hollow connecting plate 39 is provided between the first gap 36 and the second gap 38. The third heat preservation tube 35 can be used to insulate the second transmission tube 30 in cooperation with the first gap 36, and the fourth heat preservation tube 37 can be used to insulate the third heating output tube 32 in cooperation with the second gap 38. The second transmission tube 30 will emit heat energy after long-term use, so the heat energy will be placed in the first gap 36, and flow through the second heat preservation hollow connecting plate 39 to be placed in the second gap 38, so as to insulate the third heating output tube 32.

[0045] Furthermore, the heat pump system further includes a support frame 40, the primary heat pump system 1 and the secondary heat pump system 2 are arranged side by side in the support frame 40, and a heat insulation board 41 is installed outside the support frame 40. The heat insulation board 41 ensures that the external temperature does not easily affect the primary heat pump system 1 and the secondary heat pump system 2.

[0046] Furthermore, both the primary heat pump system 1 and the secondary heat pump system 2 are provided with a heat dissipation fan 42. The heat dissipation fan 42 is used to dissipate heat.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Cascade high temperature heat pump system, characterized in that: It comprises a primary heat pump system and a secondary heat pump system, wherein the primary heat pump system is provided with a primary output pipe and a primary input pipe, and the secondary heat pump system is provided with a secondary output pipe and a secondary input pipe, a first regulating guide pipe is provided between the primary output pipe and the secondary input pipe, and first control valves are provided at the connecting ends of the first regulating guide pipe, the primary output pipe and the secondary input pipe, respectively, a second regulating guide pipe is provided between the secondary output pipe and the primary input pipe, and second control valves are provided at the connecting ends of the second regulating guide pipe, the secondary output pipe and the primary input pipe, respectively; The first-level output pipe is equipped with a hot water tank, and the output of the second-level output pipe is equipped with a hot air tank. A flow control component is connected between the first-level output pipe and the second-level output pipe. The flow control component, the first regulating guide pipe and the second regulating guide pipe are arranged in sequence along the direction from the hot water tank to the first-level heat pump system; the flow control component includes a connecting pipe and two opening and closing valves, and the two opening and closing valves are respectively installed at both ends of the connecting pipe; The primary heat pump system comprises a primary compressor, a primary plate heat exchanger, a primary condenser and a primary evaporator, the output port of the primary compressor is provided with a first transmission pipe, the first transmission pipe is connected with the inlet ports of the primary plate heat exchanger and the primary condenser respectively, and a control valve is installed at the connection with the primary plate heat exchanger and the primary condenser, the input port of the primary evaporator is provided with a first inlet pipe, the first inlet pipe is connected with the output ports of the primary plate heat exchanger and the primary condenser and a control valve is installed at the connection, the input port of the primary evaporator is connected with the output ports of the primary plate heat exchanger and the primary condenser respectively, and a control valve is installed at the connection; The first-stage plate heat exchanger is equipped with a first heating input pipe and a first heating output pipe, and the first-stage condenser is equipped with a second heating input pipe and a second heating output pipe. The first heating input pipe is connected to the second heating input pipe, and a control valve is installed at the connection. The second heating output pipe is respectively connected to the first heating input pipe and the first heating output pipe, and control valves are installed at the connection.

2. The cascade high temperature heat pump system according to claim 1, characterized in that: The hot water tank and the hot gas tank are both provided with a plurality of output transmission pipes.

3. The cascade high temperature heat pump system according to claim 1, characterized in that: A first water pump connected to the primary output pipe is installed in the hot water tank, and a first air pump connected to the secondary output pipe is installed in the hot air tank.

4. The cascade high temperature heat pump system according to claim 1, characterized in that: A first insulation tube is sleeved on the first transmission tube, and a first gap is defined between the inner wall of the first insulation tube and the outer wall of the first transmission tube; a second insulation tube is sleeved on the first heating output tube, and a second gap is defined between the second insulation tube and the first heating output tube, and a first insulation hollow connecting plate is provided between the first gap and the second gap.

5. The cascade high temperature heat pump system according to claim 1, characterized in that: The secondary heat pump system comprises a secondary compressor, a secondary plate heat exchanger, a secondary condenser and a secondary evaporator, the output port of the secondary compressor is provided with a second transmission pipe, the second transmission pipe is connected with the inlet end of the secondary plate heat exchanger and the secondary condenser respectively, and a control valve is installed at the connection with the secondary plate heat exchanger and the secondary condenser, the input port of the secondary evaporator is provided with a second inlet pipe, the second inlet pipe is connected with the output end of the secondary plate heat exchanger and the secondary condenser and a control valve is installed at the connection, the input end of the secondary evaporator is connected with the output end of the secondary plate heat exchanger and the secondary condenser respectively, and a control valve is installed at the connection; The secondary plate heat exchanger is equipped with a third heating input pipe and a third heating output pipe, and the secondary condenser is equipped with a fourth heating input pipe and a fourth heating output pipe. The third heating input pipe is connected to the fourth heating input pipe, and a control valve is installed at the connection. The fourth heating output pipe is respectively connected to the third heating input pipe and the third heating output pipe, and control valves are installed at the connection.

6. The cascade high temperature heat pump system according to claim 5, characterized in that: A third insulation tube is sleeved on the second transmission tube, and a first gap is defined between the inner wall of the third insulation tube and the outer wall of the second transmission tube; a fourth insulation tube is sleeved on the third heating output tube, and a second gap is defined between the fourth insulation tube and the third heating output tube, and a second insulation hollow connecting plate is provided to connect the first gap and the second gap.

7. The cascade high temperature heat pump system according to claim 1, characterized in that: The cascade high-temperature heat pump system also includes a support frame, the primary heat pump system and the secondary heat pump system are arranged side by side in the support frame, and a heat insulation board is installed outside the support frame.

8. The cascade high temperature heat pump system according to claim 1, characterized in that: The primary heat pump system and the secondary heat pump system are both provided with heat dissipation fans.

Images