Heat pump pressure-bearing system with coupled operation of primary heating and cyclic heating

Abstract

The invention discloses a heat pump pressure-bearing system with coupled operation of primary heating and cyclic heating. The heat pump pressure-bearing system comprises a compressor, a heating water tank, a water supplementing tank, a heating structure, a defrosting structure and a circulating structure. Water is supplemented to the pressure-bearing water tank by opening the fifth water stop valve, closing the first water stop valve, the second water stop valve, the third water stop valve, the fourth water stop valve and the sixth water stop valve, the first water stop valve, the third water stop valve, the fourth water stop valve, the fifth water stop valve and the sixth water stop valve are closed, the second water stop valve is opened, a cyclic heating mode is carried out, and a unit is started for cyclic heating till T3 is 55 DEG C; then the second water stop valve is closed, the first water stop valve and the third water stop valve are opened, a primary heating mode is carried out, primary heating is carried out in the unit to 55 DEG C, the temperature T1 reaches 55 DEG C, and the unit enters the heating water tank until the water temperature T2 of the water supplementing tank reaches 55 DEG C, so that the process is completed; and after heating is completed, a third water stop valve and a first water stop valve are opened to conduct water guiding and a primary heating mode.

Description

Technical Field

[0001] The invention relates to the field of hot water systems, and in particular to a heat pump pressure bearing system for coupled operation of primary heating and circulating heating. Background Art

[0002] Domestic hot water system is an indispensable equipment in residential buildings. With the development of economy and technology and the improvement of people's living standards, the energy consumption of domestic hot water is also gradually increasing. The traditional way of producing hot water is not only energy-intensive and expensive, but also brings various hidden dangers.

[0003] At present, most of the research on hot water modes is carried out at home and abroad, and the energy-saving and carbon-reducing properties of air source heat pump hot water systems are relatively recognized. Common air source heat pump hot water is divided into two categories: circulation heating and one-time heating. Among them, the circulation heating water heater has a large workload, causes great damage to the machine and equipment components, and reduces the service life of the equipment. The one-time heating water heater has low heating efficiency and low heat utilization, resulting in heat waste. When the circulation heating and one-time heating water heaters work alone, they cannot meet the purpose of high efficiency and energy saving, reducing the practicality of the hot water system. Summary of the invention

[0004] The object of the present invention is to provide a heat pump pressure bearing system for coupled operation of primary heating and circulating heating, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a heat pump pressure bearing system for coupled operation of primary heating and circulating heating, comprising a compressor, a heating water tank, a water supply tank, a heating structure, a defrosting structure and a circulating structure, wherein the heating water tank is arranged outside the compressor, the water supply tank is arranged on one side of the heating water tank, the heating structure is arranged on the compressor, the defrosting structure is arranged on the heating structure, and the circulating structure is arranged between the heating structure and the heating water tank; The heating structure includes a four-way reversing valve, and the four-way reversing valve is fixedly connected to one end of the compressor; A fin heat exchanger, wherein the fin heat exchanger is fixedly connected to the other end of the four-way reversing valve; A filter, one end of which is fixedly connected to the other end of the fin heat exchanger; An electronic expansion valve is arranged between the filters, and two ends of the electronic expansion valve are respectively fixedly connected to one end of the filter.

[0006] Preferably, the heating structure further comprises: A shell and tube heat exchanger, one end of which is fixedly connected to the other end of the filter; A gas-liquid separator, one end of which is fixedly connected to one end of the four-way reversing valve, and the other end of which is fixedly connected to the other end of the compressor; A high-voltage switch, wherein the high-voltage switch is fixedly connected to one end of the compressor; A low-pressure switch is fixedly connected to the other end of the gas-liquid separator.

[0007] Preferably, the defrost structure comprises: A warm water valve, the warm water valve is fixedly connected to the other end of the shell and tube heat exchanger; An electric proportional ball valve, the two ends of which are respectively connected to the two ends of the warm water valve; An engineering water conservancy system, wherein the engineering water conservancy system is fixedly connected to one end of the warm water valve, and the other end of the engineering water conservancy system is connected to the heating water tank; A water stop valve 1, wherein the water stop valve 1 is connected to the engineering water conservancy system; Water stop valve 2, the water stop valve 2 is connected to the engineering water conservancy system, and the water stop valve 2 is fixedly connected to the heating water tank.

[0008] Preferably, the loop structure includes: A capillary copper tube, wherein the capillary copper tube is fixedly connected to the electronic expansion valve and the gas-liquid separator respectively; A solenoid valve, one end of which is fixedly connected to one end of the capillary copper tube, and the other end of which is fixedly connected to one end of the shell-and-tube heat exchanger; A one-way valve, one end of which is connected to the filter, and the other end of which is connected to the capillary copper tube.

[0009] Preferably, the loop structure further includes: A pressure water tank, the pressure water tank is connected to the heating water tank, and the pressure water tank is arranged between the heating water tank and the water supply tank; A water stop valve 3, one end of which is fixedly connected to the heating water tank, and the other end of which is fixedly connected to the pressure water tank; Water stop valve four, one end of which is connected to water stop valve three; Water stop valve six, one end of the water stop valve six is ​​connected to water stop valve one, and one end of the water stop valve six is ​​connected to the heating water tank.

[0010] Preferably, a water stop valve 5 is fixedly connected to the water supply tank, and drain valves are fixedly installed on the heating water tank, the pressure water tank and the water supply tank.

[0011] Preferably, the water replenishment tank is fixedly connected to the pressure water tank through a pipeline, the pressure water tanks are connected to each other through a pipeline, and one end of the water stop valve six is ​​connected to the water replenishment tank.

[0012] Preferably, one of the capillary copper tubes is arranged between the gas-liquid separator and the solenoid valve, and the other capillary copper tube is arranged between the one-way valve and the filter.

[0013] Technical effects and advantages of the present invention: The present invention opens the stop valve five, closes the stop valve one, the stop valve two, the stop valve three, the stop valve four, and the stop valve six to replenish water to the pressure water tank. After the heating water tank, the pressure water tank and the replenishing water tank are all filled with water, the stop valve one, the stop valve three, the stop valve four, the stop valve five, and the stop valve six are closed, and the stop valve two is opened to perform a circulation heating mode. Cold water passes through the stop valve two from the heating water tank and enters the unit for circulation heating until T3 is 55°C. Then the stop valve two is closed, the stop valve one and the stop valve three are opened, and a heating mode is performed. Cold water passes through the stop valve one from the replenishing water tank and enters the unit. Heating to 55℃ once makes T1 temperature reach 55℃ and enters the heating water tank. The cold water in the heating water tank is slowly pressed into the pressure water tank and the make-up water tank by the water pressure, and the cycle continues until the water temperature T2 in the make-up water tank reaches 55℃. This is completed. First, heat the heating water tank by circulating heating. After the heating is completed, open the water stop valve three and the water stop valve one to conduct water and perform the one-time heating mode until the heating is completely completed. The one-time heating and circulating heating combined operation mode is convenient for engineering installation and can improve the energy efficiency of the unit. It is more beneficial to the compressor and various accessories of the unit, and improves the practicality of the hot water system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the working principle of the present invention.

[0016] Figure 3 It is a schematic diagram of the defrosting process of the present invention.

[0017] Figure 4 It is a schematic diagram of the primary heating process of the present invention.

[0018] Figure 5 It is a schematic diagram of the circulation heating process of the present invention.

[0019] In the figure: 1. compressor; 2. four-way reversing valve; 3. fin heat exchanger; 4. filter; 5. electronic expansion valve; 6. shell and tube heat exchanger; 7. gas-liquid separator; 8. capillary copper tube; 9. solenoid valve; 10. one-way valve; 11. high-pressure switch; 12. low-pressure switch; 13. warm water valve; 14. electric proportional ball valve; 15. engineering water conservancy system; 16. water stop valve one; 17. water stop valve two; 18. water stop valve three; 19. water stop valve four; 20. water stop valve five; 21. drain valve; 22. water stop valve six; 23. heating water tank; 24. pressure water tank; 25. water supply tank. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides Figure 1-5 A heat pump pressure-bearing system with coupled operation of primary heating and circulating heating is shown, comprising a compressor 1, a heating water tank 23, a water supply tank 25, a heating structure, a defrost structure and a circulating structure. The compressor 1 is electrically connected to an external power supply through an external switch. The operation of the compressor 1 drives water to flow in the system. The heating water tank 23 is arranged outside the compressor 1. The heating water tank 23 is used to heat cold water to achieve heat transfer. The water supply tank 25 is arranged on one side of the heating water tank 23. Cold water is injected into the inner cavity of the pressure water tank 24 through the water supply tank 25. The heating structure is arranged on the compressor 1. The flowing cold water is heated by the heating structure. The defrost structure is arranged on the heating structure. The defrost structure is used to keep the flowing hot water warm. The circulating structure is arranged between the heating structure and the heating water tank 23. The water is circulated through the circulating structure and circulates at the heating structure.

[0022] Specifically, the heating structure includes a four-way reversing valve 2, a fin heat exchanger 3, a filter 4, an electronic expansion valve 5, a shell and tube heat exchanger 6, a gas-liquid separator 7, a high-pressure switch 11 and a low-pressure switch 12. The four-way reversing valve 2 is fixedly connected to one end of the compressor 1, and the flow direction of the water flow is controlled by the four-way reversing valve 2. The fin heat exchanger 3 is fixedly connected to the other end of the four-way reversing valve 2. The fin heat exchanger 3 is made of metal aluminum material and uses the evaporation effect to exchange heat. One end of the filter 4 is fixedly connected to the other end of the fin heat exchanger 3, and the filter 4 is used to filter impurities in the water flow. The electronic expansion valve 5 is arranged between the filters 4, and the two ends of the electronic expansion valve 5 are respectively fixedly connected to one end of the filter 4. One end of the shell and tube heat exchanger 6 is fixedly connected to the other end of the filter 4. The shell and tube heat exchanger 6 is arranged in a spiral tube shape. When the water flows through the inner cavity of the shell and tube heat exchanger 6, the heat transfer is increased. The time of delivery is improved to improve the heat exchange efficiency. One end of the gas-liquid separator 7 is fixedly connected to one end of the four-way reversing valve 2, and the other end of the gas-liquid separator 7 is fixedly connected to the other end of the compressor 1. The high-pressure switch 11 is fixedly connected to one end of the compressor 1, and the low-pressure switch 12 is fixedly connected to the other end of the gas-liquid separator 7. The compressor 1 operates normally, discharges high-temperature and high-pressure refrigerant vapor, which is reversed by the four-way reversing valve 2 and flows through the shell and tube heat exchanger 6 for heat exchange to produce hot water to become a high-pressure medium-temperature liquid refrigerant. After being filtered by the filter 4, the electronic expansion valve 5 throttles and reduces the pressure and flows through the filter 4 again for filtration, enters the fin heat exchanger 3 to evaporate and absorb heat to become a low-pressure refrigerant vapor, and the four-way reversing valve 2 is reversed and flows through the gas-liquid separator 7 and enters the compressor 1. This cycle is repeated. During this cycle, the exhaust temperature is detected. Once the exhaust temperature is higher than the exhaust temperature protection value, the solenoid valve 9 is opened to spray liquid to reduce the exhaust temperature.

[0023] Furthermore, the defrosting structure includes a warm water valve 13, an electric proportional ball valve 14, an engineering water system 15, a water stop valve 16 and a water stop valve 2 17. The warm water valve 13 is fixedly connected to the other end of the shell and tube heat exchanger 6, and the two ends of the electric proportional ball valve 14 are respectively connected to the two ends of the warm water valve 13. The flow rate of the water flow in the pipeline is adjusted by the electric proportional ball valve 14 to facilitate the defrosting operation. The engineering water system 15 is fixedly connected to one end of the warm water valve 13, and the other end of the engineering water system 15 is connected to the heating water tank 23. The engineering water system 15 is composed of a variable frequency water pump, a water filter, a flexible pipe and a check valve component. The water stop valve 16 is connected to the engineering water system 15, the water stop valve 2 17 is connected to the engineering water system 15, and the water stop valve 2 17 is connected to the engineering water system 15. It is fixedly connected to the heating water tank 23, and the compressor 1 operates normally, discharges high-temperature and high-pressure refrigerant vapor, which is reversed by the four-way reversing valve 2 and flows through the fin heat exchanger 3 for heat exchange, so that all the frost on the fins is melted into water and discharged. At this time, the high-temperature and high-pressure refrigerant vapor becomes a high-pressure medium-temperature liquid refrigerant. After being filtered by the filter 4, the electronic expansion valve 5 throttles and reduces the pressure and flows through the filter 4 again for filtration, enters the shell and tube heat exchanger 6 to evaporate and absorb heat to become a low-pressure refrigerant vapor, and after the four-way reversing valve 2 is reversed, it flows through the gas-liquid separator 7 and enters the compressor 1 until all the frost on the fins is melted, the water stop valve 16 is closed, the water stop valve 2 17 is opened, the electric proportional ball valve 14 is opened, and the warm water valve 13 is closed. In order to quickly defrost, the variable frequency water pump needs to provide a large flow rate to quickly complete the defrosting and reduce the speed of water temperature reduction.

[0024] In particular, the circulation structure includes a capillary copper tube 8, a solenoid valve 9, a one-way valve 10, a pressure water tank 24, a stop valve three 18, a stop valve four 19 and a stop valve six 22, the capillary copper tube 8 is fixedly connected to the electronic expansion valve 5 and the gas-liquid separator 7 respectively, one end of the solenoid valve 9 is fixedly connected to one end of the capillary copper tube 8, the other end of the solenoid valve 9 is fixedly connected to one end of the shell and tube heat exchanger 6, one end of the one-way valve 10 is connected to the filter 4, the other end of the one-way valve 10 is connected to the capillary copper tube 8, the pressure water tank 24 is connected to the heating water tank 23, the pressure water tank 24 is arranged between the heating water tank 23 and the water supply tank 25, one end of the stop valve three 18 is fixedly connected to the heating water tank 23, the other end of the stop valve three 18 is fixedly connected to the pressure water tank 24, One end of valve four 19 is connected to water stop valve three 18, one end of water stop valve six 22 is connected to water stop valve one 16, and one end of water stop valve six 22 is connected to heating water tank 23. During primary heating, first open water stop valve five 20, close water stop valve one 16, water stop valve two 17, water stop valve three 18, water stop valve four 19, water stop valve six 22, replenish water to pressure water tank 24, and after heating water tank 23, pressure water tank 24 and replenishing water tank 25 are all filled with water, close water stop valve two 17, water stop valve three 18, water stop valve four 19, water stop valve five 20, water stop valve six 22, open water stop valve one 16 to perform primary heating mode, cold water passes through water stop valve one 16 from replenishing water tank, enters unit and is heated to 55℃ for primary heating, at this time, variable frequency water pump needs small flow, through warm water valve 1 3 Control the water flow rate so that the temperature T1 reaches 55°C and enters the heating water tank 23. The cold water in the heating water tank 23 is slowly pressed into the pressure water tank 24 and the make-up water tank 25 by the water pressure, and the cycle continues until the water temperature T2 in the make-up water tank 25 reaches 55°C. This is completed. During the circulation heating, first open the stop valve five 20, close the stop valve one 16, the stop valve two 17, the stop valve three 18, the stop valve four 19, the stop valve six 22, and replenish the pressure water tank 24. After the heating water tank 23, the pressure water tank 24 and the make-up water tank 25 are all filled with water, close the stop valve one 16, the stop valve three 18, the stop valve four 19, the stop valve five 20, the stop valve six 22, and open the stop valve two 17 to perform the circulation heating mode. The cold water flows from the heating water tank through the stop valve two 17 into the The water in the heating unit is circulated and heated until T3 is 55℃. At this time, the water stop valve three 18 and the water stop valve six 22 are opened. The water in the heating water tank 23 is slowly pressed into the pressure water tank 24 and the make-up water tank 25 by the water pressure. The cold water enters the heating water tank 23 from the water stop valve six 22, and the cycle is repeated until the water temperature T2 of the make-up water tank 25 reaches 55℃. This process is completed. The variable frequency water pump requires a large flow rate. The water flow rate is controlled by the electric proportional ball valve 14. The heating water tank 23 is first circulated and heated, and then the water is guided. Then the water is continuously heated and guided until the water temperature T2 of the make-up water tank 25 reaches 55℃ to complete the heating. In the coupling mode, first open the water stop valve five 20, close the water stop valve one 16, the water stop valve two 17, the water stop valve three 18, the water stop valve four 19, and the water stop valve six 22, and replenish the pressure water tank 24 with water.After the heating water tank 23, the pressure water tank 24 and the make-up water tank 25 are all filled with water, close the stop valve 16, the stop valve 3 18, the stop valve 4 19, the stop valve 5 20, and the stop valve 6 22, and open the stop valve 2 17 to perform the circulation heating mode. Cold water from the heating water tank 23 passes through the stop valve 2 17 and enters the unit for circulation heating until T3 is 55°C. In this process, the variable frequency water pump requires a large flow rate. The water flow rate is controlled by the electric proportional ball valve 14, and then the stop valve 2 17 is closed and the stop valve 1 16 and the stop valve 3 18 are opened to perform the primary heating mode. Cold water from the make-up water tank 25 passes through the stop valve 1 16 and enters the unit for a primary heating. Heat to 55℃. In this process, the variable frequency water pump needs a small flow rate. The water flow rate is controlled by the warm water valve 13, so that the temperature T1 reaches 55℃ and enters the heating water tank 23. The cold water in the heating water tank 23 is slowly pressed into the pressure water tank 24 and the water supply tank 25 by the water pressure, and the cycle continues until the water temperature T2 of the water supply tank 25 reaches 55℃. This is completed. First, heat the heating water tank 23 by circulating heating. After the heating is completed, open the water stop valve 3 18 and the water stop valve 1 16 to conduct water and the one-time heating mode until the heating is completed. In the fast heating mode, the heat pump system and the internal electric heating of the heating water tank 23 are heated together to quickly produce hot water.

[0025] A water stop valve 5 20 is fixedly connected to the water supply tank 25, and a drain valve 21 is fixedly installed on the heating water tank 23, the pressure water tank 24 and the water supply tank 25. The water supply tank 25 is fixedly connected to the pressure water tank 24 through a pipeline, and the pressure water tanks 24 are connected by pipelines. One end of the water stop valve 6 22 is connected to the water supply tank 25, one of the capillary copper tubes 8 is arranged between the gas-liquid separator 7 and the solenoid valve 9, and the other capillary copper tube 8 is arranged between the one-way valve 10 and the filter 4.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat pump pressure bearing system with coupled operation of primary heating and circulating heating, characterized in that: The invention comprises a compressor (1), a heating water tank (23), a water supply tank (25), a heating structure, a defrosting structure and a circulation structure, wherein the heating water tank (23) is arranged outside the compressor (1), the water supply tank (25) is arranged on one side of the heating water tank (23), the heating structure is arranged on the compressor (1), the defrosting structure is arranged on the heating structure, and the circulation structure is arranged between the heating structure and the heating water tank (23); The heating structure comprises a four-way reversing valve (2), wherein the four-way reversing valve (2) is fixedly connected to one end of the compressor (1); A fin heat exchanger (3), wherein the fin heat exchanger (3) is fixedly connected to the other end of the four-way reversing valve (2); A filter (4), one end of the filter (4) being fixedly connected to the other end of the fin heat exchanger (3); An electronic expansion valve (5), wherein the electronic expansion valve (5) is arranged between the filters (4), and both ends of the electronic expansion valve (5) are respectively fixedly connected to one end of the filter (4).

2. A heat pump pressure bearing system for coupled operation of primary heating and circulating heating according to claim 1, characterized in that: The heating structure also includes: A shell and tube heat exchanger (6), one end of the shell and tube heat exchanger (6) being fixedly connected to the other end of the filter (4); A gas-liquid separator (7), one end of the gas-liquid separator (7) being fixedly connected to one end of the four-way reversing valve (2), and the other end of the gas-liquid separator (7) being fixedly connected to the other end of the compressor (1); A high-voltage switch (11), the high-voltage switch (11) being fixedly connected to one end of the compressor (1); A low-pressure switch (12), wherein the low-pressure switch (12) is fixedly connected to the other end of the gas-liquid separator (7).

3. The heat pump pressure bearing system for coupled operation of primary heating and circulating heating according to claim 2 is characterized in that: The defrost structure comprises: A warm water valve (13), the warm water valve (13) being fixedly connected to the other end of the shell and tube heat exchanger (6); An electric proportional ball valve (14), wherein two ends of the electric proportional ball valve (14) are respectively connected to two ends of the warm water valve (13); An engineering water conservancy system (15), wherein the engineering water conservancy system (15) is fixedly connected to one end of the warm water valve (13), and the other end of the engineering water conservancy system (15) is connected to a heating water tank (23); A water stop valve (16), wherein the water stop valve (16) is connected to the engineering water conservancy system (15); A second water stop valve (17), the second water stop valve (17) is connected to the engineering water conservancy system (15), and the second water stop valve (17) is fixedly connected to the heating water tank (23).

4. A heat pump pressure bearing system for coupled operation of primary heating and circulating heating according to claim 3, characterized in that: The loop structure includes: A capillary copper tube (8), wherein the capillary copper tube (8) is fixedly connected to the electronic expansion valve (5) and the gas-liquid separator (7) respectively; A solenoid valve (9), one end of the solenoid valve (9) being fixedly connected to one end of the capillary copper tube (8), and the other end of the solenoid valve (9) being fixedly connected to one end of the shell-and-tube heat exchanger (6); A one-way valve (10), one end of the one-way valve (10) is connected to the filter (4), and the other end of the one-way valve (10) is connected to the capillary copper tube (8).

5. The heat pump pressure bearing system for coupled operation of primary heating and circulating heating according to claim 4 is characterized in that: The loop structure also includes: A pressure water tank (24), the pressure water tank (24) being connected to the heating water tank (23), and the pressure water tank (24) being arranged between the heating water tank (23) and the water supply tank (25); A water stop valve (18), one end of the water stop valve (18) being fixedly connected to the heating water tank (23), and the other end of the water stop valve (18) being fixedly connected to the pressure water tank (24); A water stop valve four (19), one end of which is connected to the water stop valve three (18); Water stop valve six (22), one end of the water stop valve six (22) is connected to water stop valve one (16), and one end of the water stop valve six (22) is connected to the heating water tank (23).

6. The heat pump pressure bearing system for coupled operation of primary heating and circulating heating according to claim 5, characterized in that: A water stop valve 5 (20) is fixedly connected to the water supply tank (25), and a sewage discharge valve (21) is fixedly installed on the heating water tank (23), the pressure water tank (24) and the water supply tank (25).

7. A heat pump pressure bearing system for coupled operation of primary heating and circulating heating according to claim 6, characterized in that: The water replenishment tank (25) is fixedly connected to the pressure water tank (24) via a pipeline, the pressure water tanks (24) are connected via a pipeline, and one end of the water stop valve 6 (22) is connected to the water replenishment tank (25).

8. The heat pump pressure bearing system for coupled operation of primary heating and circulating heating according to claim 7, characterized in that: One of the capillary copper tubes (8) is arranged between the gas-liquid separator (7) and the solenoid valve (9), and the other capillary copper tube (8) is arranged between the one-way valve (10) and the filter (4).

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