Air energy heat pump heat supply system with high pressure ratio and low pressure ratio switchable
By introducing split heat pipes and pipeline components to control the pressure ratio in the air energy heat pump system, the problem of excessive condensation temperature in the wellhead anti-freeze and domestic hot water supply is solved, and efficient heat pump operation and safe hot water supply are achieved.
Patent Information
- Application Number
- CN202420826739.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The existing air energy heat pump system has problems with excessive condensation temperature in the wellhead anti-freeze and domestic hot water supply, which leads to low energy efficiency and safety risks. The use of gas boilers and electric boilers has gas leakage and high operating costs.
Design an air energy heat pump heating system with switchable size and pressure ratios. By setting up a split heat pipe system in the condenser, using phase change heat transfer to reduce the condensation temperature, and controlling the compressor through the pipeline assembly to provide different pressure ratios, to achieve Efficient supply of wellhead heating and domestic hot water.
It effectively reduces the condensation temperature of the wellhead, improves the energy efficiency of the air energy heat pump, meets the wellhead anti-freezing requirements, and improves the supply efficiency of domestic hot water during non-cold periods, reducing operating costs and safety risks.
Smart Images
Figure CN222164962U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air energy heat pumps, in particular to an air energy heat pump heating system with switchable large and small pressure ratios. Background Art
[0002] According to "Opportunities for the Development of the Heat Pump Industry under the Dual Carbon Goals" published by Academician Jiang Yi of the Chinese Academy of Engineering, 15% of the carbon reduction in the whole society depends on heat pumps. Heat pumps are important equipment for clean heating in my country and are the most efficient equipment for converting electricity into heat. In the context of carbon peak, carbon neutrality and building electrification, heat pumps, as a key technical solution, have a visible long-term growth certainty.
[0003] As far as wellhead antifreeze is concerned, "Coal Safety" stipulates that the fresh air entering the well must be greater than 2°C. Ordinary air-to-air heat pumps often produce 45-50°C hot water to supply the air inlet wellhead, so the condensation temperature will exceed 55°C. If the condensation temperature can be reduced to below 20°C (low pressure ratio conditions), it can fully meet the "Coal Safety" requirements, and this also greatly improves the energy efficiency of the heat pump, which not only saves energy and electricity, reduces power consumption, but also greatly reduces operating costs.
[0004] In addition to wellhead antifreeze, the mining area needs domestic hot water throughout the year, and also needs to provide a large amount of stable heat source. At present, domestic hot water is mostly produced by gas boilers and electric boilers. These two forms have the problem of easy gas leakage, poor safety, high operating costs, and increase the risk source and cost pressure on coal mines.
[0005] Therefore, there is an urgent need for an air energy heat pump heating system with switchable pressure ratios. By using the condenser of the air energy heat pump as the evaporator of the heat pipe, the phase change working fluid of the heat pump host is condensed in the condenser, and the circulating working fluid of the split heat pipe system evaporates here. The evaporated working fluid steam is quickly transferred to the condenser of the separate heat pipe by pressure potential energy. The condenser is also used as a heater for wellhead heating. The heat is dissipated in the split heat pipe condenser to heat the fresh air entering the well, and finally the requirement of fresh air entering the well is not less than 2°C is met; after adding the split heat pipe, the heat energy transmission mode is changed from traditional temperature difference heat transfer to phase change heat transfer, which invisibly reduces the condensation temperature by about 5°C and reduces the condensation-evaporation temperature difference again, while the wellhead heater is not frozen and the energy efficiency of the heat pump is further improved; except in winter, a large pressure ratio air energy heat pump can be used to produce 45-50°C domestic hot water; the outdoor temperature is relatively high during non-cold periods. At this time, by storing the high heat source in the hot water tank and supplying domestic hot water, the energy efficiency of the heat pump can be greatly improved, the operating cost can be reduced, and the safety is high. Utility Model Content
[0006] The utility model aims to provide an air energy heat pump heating system with switchable large and small pressure ratios, so as to solve the problems existing in the above-mentioned prior art.
[0007] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model provides an air-energy heat pump heating system with switchable large and small pressure ratios, including an air-energy heat pump unit, the air-energy heat pump unit including a first compressor and a second compressor, the first compressor and the second compressor are connected to a first heating component, a second heating component and an evaporator through a pipeline component, the first heating component is connected to a condensing section, the condensing section is used to heat the air inlet shaft, and the second heating component is used to heat domestic water; the first heating component is connected to a first throttle valve, the second heating component is connected to a second throttle valve, the first throttle valve and the second throttle valve are connected to the evaporator through a first three-way pipe.
[0008] Preferably, the pipeline assembly includes a second tee and a fourth tee, the first branch of the second tee is connected to the first branch of the third tee, the second branch of the second tee is connected to the first compressor, the third branch of the second tee is connected to the second compressor, and the first electric valve is installed on the second branch of the second tee.
[0009] Preferably, the first branch of the fourth three-way pipe is connected to the evaporator, the second branch of the fourth three-way pipe is connected to the first compressor, the third branch of the fourth three-way pipe is connected to the second compressor, and a third electric valve is installed on the third branch of the fourth three-way pipe.
[0010] Preferably, the second branch pipe of the second three-way pipe is connected to the second branch pipe of the fourth three-way pipe through a connecting pipe, and a second electric valve is installed on the connecting pipe.
[0011] Preferably, one end of the connecting pipe is arranged between the second branch pipe of the second three-way pipe and the first compressor, and the other end of the connecting pipe is arranged between the second branch pipe of the fourth three-way pipe and the second compressor.
[0012] Preferably, the second branch of the third three-way pipe is connected to the first heat supply component, and the third branch of the third three-way pipe is connected to the second heat supply component.
[0013] Preferably, a fifth electric valve is installed on the second branch pipe of the third three-way pipe, and a fourth electric valve is installed on the third branch pipe of the third three-way pipe.
[0014] Preferably, the first heating component includes a shell, in which a first condenser and an evaporation section are installed, the inlet end of the first condenser is connected to the second branch of the third three-way pipe, the outlet end of the first condenser is connected to the first throttle valve, and the evaporation section is connected to the condensation section.
[0015] Preferably, the second heating component includes a hot water tank, in which a second condenser is arranged, the inlet end of the second condenser is connected to the third branch of the third three-way pipe, the outlet end of the second condenser is connected to the second throttle valve, the water inlet end of the hot water tank is connected to the factory water supply network through the silicon phosphorus crystal tank, and the water outlet end of the hot water tank is connected to the factory hot water network through the water supply pump.
[0016] The utility model discloses the following technical effects:
[0017] The utility model controls the first compressor and the second compressor to provide different pressure ratios through a pipeline component, thereby effectively increasing the pressure ratio variation range of the air energy heat pump unit. In winter, the wellhead is heated by the small pressure ratio of the air energy heat pump unit, which effectively solves the anti-freezing problem of the wellhead; at the same time, the heating efficiency of the air energy heat pump operated in winter is greatly improved; in non-cold periods, as the outdoor temperature continues to rise, the large pressure ratio of the air energy heat pump unit is used to produce domestic hot water required throughout the year. At this time, the heating efficiency of the operating air energy heat pump unit is also relatively high. Through the reasonable switching of the large and small pressure ratios of the air energy heat pump unit, the air energy heat pump unit can be kept at a relatively high heating efficiency all year round. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Among them, 1. the first compressor; 2. the second compressor; 3a. the first electric valve; 3b. the second electric valve; 3c. the third electric valve; 3d. the fourth electric valve; 3e. the fifth electric valve; 4a. the first condenser; 4b. the second condenser; 5a. the first throttle valve; 5b. the second throttle valve; 6. the evaporator; 7. the water supply pump; 8. the silicon phosphorus crystal tank; 9a. the evaporation section; 9b. the condensation section; 10. the hot water tank. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0023] Reference Figure 1 The utility model discloses an air energy heat pump heating system with switchable large and small pressure ratios, including an air energy heat pump unit, the air energy heat pump unit including a first compressor 1 and a second compressor 2, the first compressor 1 and the second compressor 2 are connected to a first heating component, a second heating component and an evaporator 6 through a pipeline component, the first heating component is connected to a condensing section 9b, the condensing section 9b is used to heat the air inlet shaft, and the second heating component is used to heat domestic water; the first heating component is connected to a first throttle valve 5a, the second heating component is connected to a second throttle valve 5b, the first throttle valve 5a and the second throttle valve 5b are connected to the evaporator 6 through a first three-way pipe.
[0024] The utility model controls the first compressor 1 and the second compressor 2 to provide different pressure ratios through a pipeline component, which effectively increases the pressure ratio variation range of the air energy heat pump unit. In winter, the wellhead is heated by the small pressure ratio of the air energy heat pump unit, which effectively solves the anti-freezing problem of the wellhead; at the same time, the heating efficiency of the air energy heat pump unit operating in winter is greatly improved; during non-cold periods, as the outdoor temperature continues to rise, the large pressure ratio of the air energy heat pump unit is used to produce domestic hot water required throughout the year. At this time, the heating efficiency of the operating air energy heat pump unit is also relatively high. Through the reasonable switching of the large and small pressure ratios of the air energy heat pump unit, the air energy heat pump unit can be kept at a relatively high heating efficiency all year round.
[0025] A further optimized solution is that the pipeline assembly includes a second three-way pipe and a fourth three-way pipe, the first branch of the second three-way pipe is connected to the first branch of the third three-way pipe, the second branch of the second three-way pipe is connected to the first compressor 1, the third branch of the second three-way pipe is connected to the second compressor, and the first electric valve 3a is installed on the second branch of the second three-way pipe.
[0026] According to a further optimization scheme, the first branch of the fourth three-way pipe is connected to the evaporator 6, the second branch of the fourth three-way pipe is connected to the first compressor 1, the third branch of the fourth three-way pipe is connected to the second compressor 2, and the third electric valve 3c is installed on the third branch of the fourth three-way pipe.
[0027] According to a further optimized solution, the second branch of the second three-way pipe is connected to the second branch of the fourth three-way pipe through a connecting pipe, and a second electric valve 3b is installed on the connecting pipe.
[0028] According to a further optimized solution, one end of the connecting pipe is arranged between the second branch pipe of the second three-way pipe and the first compressor 1 , and the other end of the connecting pipe is arranged between the second branch pipe of the fourth three-way pipe and the second compressor 2 .
[0029] To further optimize the solution, the second branch of the third three-way pipe is connected to the first heating component, and the third branch of the third three-way pipe is connected to the second heating component.
[0030] According to a further optimized solution, a fifth electric valve 3e is installed on the second branch of the third three-way pipe, and a fourth electric valve 3d is installed on the third branch of the third three-way pipe.
[0031] When the second compressor 2, the third electric valve 3c and the fourth electric valve 3d are in the closed state, an air energy heat pump heating system with a small pressure ratio working condition is formed through the first compressor 1, the first electric valve 3a, the fifth electric valve 3e, the first condenser 4a, the first throttle valve 5a, the evaporator 6, the evaporation section 9a and the condensation section 9b.
[0032] When the first electric valve 3a and the fifth electric valve 3e are in the closed state, an air energy heat pump heating system with a large pressure ratio working condition is formed through the first compressor 1, the second compressor 2, the second electric valve 3b, the third electric valve 3c, the fourth electric valve 3d, the second condenser 4b, the second throttle valve 5b, the evaporator 6, the water supply pump 7, and the hot water tank 10.
[0033] A further optimized solution is that the first heating component includes a shell, in which the first condenser 4a and the evaporation section 9a are installed, the inlet end of the first condenser 4a is connected to the second branch of the third three-way pipe, the outlet end of the first condenser 4a is connected to the first throttle valve 5a, and the evaporation section 9a is connected to the condensation section 9b.
[0034] The first condenser 4a and the evaporation section 9a form an integrated heat exchanger. The evaporation section 9a is a split heat pipe evaporator. The air outlet pipe of the evaporation section 9a is connected with the air inlet pipe of the condensation section 9b, and the air outlet pipe of the condensation section 9b is connected with the air inlet pipe of the evaporation section 9a. At the same time, the outdoor fresh air is heated by the condensation section 9b and then sent into the air inlet shaft to supply heat to the wellhead, which effectively solves the anti-freezing problem of the wellhead.
[0035] To further optimize the solution, the second heating component includes a hot water tank 10, in which a second condenser 4b is arranged, the inlet end of the second condenser 4b is connected to the third branch of the third three-way pipe, the outlet end of the second condenser 4b is connected to the second throttle valve 5b, the water inlet end of the hot water tank is connected to the factory water supply network through the silicon phosphorus crystal tank 8, and the water outlet end of the hot water tank is connected to the factory hot water network through the water supply pump 7.
[0036] The water in the factory water supply network is processed by the silicon phosphorus crystal tank 8 and then flows into the hot water tank 10. The second condenser 4b heats the cold water in the hot water tank 10. When the water temperature in the hot water tank 10 reaches the set temperature, the fourth electric valve 3d is closed, and the hot water in the hot water tank 10 is supplied to the factory hot water network through the water supply pump 7 to provide hot water for domestic use.
[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0038] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.
Claims
1. An air energy heat pump heating system with switchable pressure ratio, characterized in that: The air energy heat pump unit comprises a first compressor (1) and a second compressor (2), wherein the first compressor (1) and the second compressor (2) are connected to a first heating component, a second heating component and an evaporator (6) via a pipeline component, wherein the first heating component is connected to a condensing section (9b), wherein the condensing section (9b) is used to heat an air intake shaft, and the second heating component is used to heat domestic water; The first heating component is connected to a first throttle valve (5a), and the second heating component is connected to a second throttle valve (5b). The first throttle valve (5a) and the second throttle valve (5b) are connected to the evaporator (6) via a first three-way pipe.
2. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 1 is characterized in that: The pipeline assembly comprises a second tee and a fourth tee, wherein the first branch of the second tee is connected to the first branch of the third tee, the second branch of the second tee is connected to the first compressor (1), the third branch of the second tee is connected to the second compressor, and the second branch of the second tee is installed with a first electric valve (3a).
3. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 2 is characterized in that: The first branch of the fourth three-way pipe is connected to the evaporator (6), the second branch of the fourth three-way pipe is connected to the first compressor (1), the third branch of the fourth three-way pipe is connected to the second compressor (2), and a third electric valve (3c) is installed on the third branch of the fourth three-way pipe.
4. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 3 is characterized in that: The second branch pipe of the second three-way pipe is connected to the second branch pipe of the fourth three-way pipe through a connecting pipe, and a second electric valve (3b) is installed on the connecting pipe.
5. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 4 is characterized in that: One end of the connecting pipe is arranged between the second branch pipe of the second three-way pipe and the first compressor (1), and the other end of the connecting pipe is arranged between the second branch pipe of the fourth three-way pipe and the second compressor (2).
6. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 2 is characterized in that: The second branch pipe of the third three-way pipe is connected to the first heat supply component, and the third branch pipe of the third three-way pipe is connected to the second heat supply component.
7. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 6 is characterized in that: A fifth electric valve (3e) is installed on the second branch pipe of the third three-way pipe, and a fourth electric valve (3d) is installed on the third branch pipe of the third three-way pipe.
8. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 6 is characterized in that: The first heating component comprises a shell, in which a first condenser (4a) and an evaporation section (9a) are installed, the inlet end of the first condenser (4a) is connected to the second branch of the third three-way pipe, the outlet end of the first condenser (4a) is connected to the first throttle valve (5a), and the evaporation section (9a) is connected to the condensation section (9b).
9. The air energy heat pump heating system with switchable large and small pressure ratios according to claim 6 is characterized in that: The second heating component comprises a hot water tank (10), a second condenser (4b) is arranged in the hot water tank (10), an inlet end of the second condenser (4b) is connected to the third branch of the third three-way pipe, and an outlet end of the second condenser (4b) is connected to the second throttle valve (5b). The water inlet end of the hot water tank is connected to the factory water supply network through the silicon phosphorus crystal tank (8), and the water outlet end of the hot water tank is connected to the factory hot water network through the water supply pump (7).