Efficient variable-frequency triple-generation heat pump system

Abstract

The utility model relates to the technical field of triple co-generation, and discloses a high-efficiency variable-frequency triple co-generation heat pump system which is used for manufacturing hot water through waste heat generated by a compressor driving plate, so that the heat recovery effect of the system is greatly improved, the energy efficiency of the system is improved, and meanwhile, the installation of a hot water tank is omitted. When the hot water tank is replaced, the refrigerant does not need to be subjected to heat exchange through the hot water tank, so that the problems of incomplete defrosting and long defrosting time of a fin heat exchanger are solved, and the problem that a heat exchanger (hot water tank) on the hot water side and a heat exchanger (water side heat exchanger) on the heating side scramble for heat in winter is also solved. The triple co-generation heat pump system is more stable in operation, lower in failure rate and higher in overall energy efficiency.

Description

Technical Field

[0001] This utility model relates to the field of combined heat and power technology, specifically, to a high-efficiency variable frequency combined heat and power heat pump system. Background Technology

[0002] With the increasing popularity of air source heat pumps, most households install a dual-heating (heating + cooling) system and a heat pump water heater. However, in many economically developed areas, housing prices are high, making the cost and hassle of installing two units significant. Therefore, the market for triple-heating systems is growing. However, conventional high-efficiency variable frequency triple-heating (heating + cooling + hot water) systems often suffer from defrosting difficulties and unstable operation. For example... Figure 2 The diagram shows a conventional high-efficiency variable frequency triple-heat pump system. When the main unit is running, the low-temperature, low-pressure refrigerant vapor is transformed into high-temperature, high-pressure superheated vapor by the variable frequency compressor. It first enters the heat exchanger inside the hot water tank, where it exchanges heat with the water and becomes a medium-temperature, high-pressure liquid. After passing through a four-way valve, it exchanges heat with the water-side heat exchanger on the heating side, further reducing its temperature. Then, it passes through the receiver and is throttled by the electronic expansion valve, becoming a low-temperature, low-pressure refrigerant liquid. After forced convection heat exchange with the fan through the finned heat exchanger, it becomes a low-temperature, low-pressure gas. Through gas-liquid separation, it returns to the compressor.

[0003] Conventional high-efficiency variable frequency triple-heat pump systems have three significant drawbacks. First, during winter operation, after the finned heat exchangers frost over, the high-temperature, high-pressure gas discharged from the variable frequency compressor must first enter the hot water heat exchanger before passing through the four-way valve to reach the finned heat exchanger. This path results in relatively little heat entering the finned heat exchanger, leading to incomplete defrosting and a prolonged defrosting time. Second, during winter operation, if both heating and hot water are needed simultaneously, the hot water side heat exchanger (hot water tank) and the heating side heat exchanger (water-side heat exchanger) compete for heat, resulting in slower heating rates for both hot water and heating, and poor energy efficiency. Third, the compressor drive plate is typically mounted on a partition plate and cooled by a fan. However, when the main unit is operating in cooling mode, the finned heat exchanger becomes a condenser, causing the fan to blow out high-temperature air, severely reducing the cooling effect on the compressor drive plate. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a high-efficiency variable frequency triple-heat pump system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency variable frequency triple heat pump system is disclosed. The triple heat pump system includes a compressor drive board and a variable frequency compressor. The variable frequency compressor is connected to the compressor drive board to form a circuit. A heat transfer tube is provided on the compressor drive board. One end of the heat transfer tube is connected to the tap water supply end and is equipped with a proportional integral regulating valve. The other end is the water outlet end and is equipped with a hot water outlet sensor.

[0007] Preferably, the variable frequency compressor has a power of at least 5 horsepower, which is sufficient to support the power required for hot water heating.

[0008] Preferably, the heat transfer tube is spirally wound around the compressor drive plate, thereby exchanging heat with the compressor drive plate.

[0009] Preferably, the triple heat pump system also includes a vapor-liquid separator and a four-way valve. The variable frequency compressor, vapor-liquid separator and four-way valve are connected in sequence through pipelines to form a loop.

[0010] Preferably, a return gas temperature sensor is installed on the pipeline between the variable frequency compressor and the gas-liquid separator, and an exhaust gas temperature sensor is installed on the pipeline between the variable frequency compressor and the four-way valve.

[0011] Preferably, the triple-heat pump system further includes a water-side heat exchanger, a liquid receiver, a finned heat exchanger, and a fan. The water-side heat exchanger, liquid receiver, finned heat exchanger, and four-way valve are sequentially connected via pipes to form a loop, and the fan is located on one side of the finned heat exchanger. The pipes are coiled in a serpentine pattern inside the water-side heat exchanger and outside the finned heat exchanger, respectively, so that the refrigerant in the pipes can exchange heat with the flowing water in the water-side heat exchanger and the finned heat exchanger.

[0012] Preferably, the water-side heat exchanger has an inlet at one end and an outlet at the other end. A unit circulating water pump is installed on the inlet pipe. An inlet water temperature sensor and a flow switch are installed between the water-side heat exchanger and the unit circulating water pump, and an outlet water temperature sensor is installed on the outlet pipe. The water flowing in the water-side heat exchanger exchanges heat with the pipes in the water-side heat exchanger.

[0013] Preferably, an electronic expansion valve is provided between the liquid reservoir and the finned heat exchanger.

[0014] Preferably, the finned heat exchanger is equipped with a coil temperature sensor.

[0015] This invention provides a high-efficiency variable frequency triple-heat pump system. This system generates hot water using waste heat from the compressor drive board, significantly improving the system's heat recovery and energy efficiency, while eliminating the need for a hot water tank. By replacing the hot water tank, the refrigerant no longer needs to exchange heat through it, thus avoiding the problems of incomplete defrosting and long defrosting times associated with finned heat exchangers. It also avoids the competition for heat between the hot water-side heat exchanger (hot water tank) and the heating-side heat exchanger (water-side heat exchanger) in winter. This triple-heat pump system offers more stable operation, a lower failure rate, and higher overall energy efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the high-efficiency variable frequency triple heat pump system of this application.

[0017] Figure 2 This is a schematic diagram of a conventional high-efficiency variable frequency triple heat pump system.

[0018] Reference numerals: 1-Compressor drive board, 2-Heat transfer tube, 3-Proportional integral regulating valve, 4-Hot water outlet sensor, 5-Variable frequency compressor, 6-Vacuum-liquid separator, 7-Four-way valve, 8-Return gas temperature sensor, 9-Exhaust gas temperature sensor, 10-Water-side heat exchanger, 11-Liquid receiver, 12-Finned heat exchanger, 13-Fan, 14-Unit circulating water pump, 15-Inlet water temperature sensor, 16-Outlet water temperature sensor, 17-Flow switch, 18-Electronic expansion valve, 19-Coil temperature sensor, 20-Hot water tank. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] like Figure 1 As shown, a high-efficiency variable frequency triple heat pump system is provided. The triple heat pump system includes two parts: a hot water system and a heating and cooling system, which are connected by a four-way valve 7.

[0022] The hot water system includes a compressor drive board 1, a variable frequency compressor 5, a vapor-liquid separator 6, and a four-way valve 7. The variable frequency compressor 5 and the compressor drive board 1 are connected by pipes to form a loop. The variable frequency compressor 5, the vapor-liquid separator 6, and the four-way valve 7 are sequentially connected by pipes to form a loop. A return gas temperature sensor 8 is installed on the pipe between the variable frequency compressor 5 and the vapor-liquid separator 6, and an exhaust gas temperature sensor 9 is installed on the pipe between the variable frequency compressor 5 and the four-way valve 7. A spirally wound heat transfer tube 2 is installed on the compressor drive board 1. One end of the heat transfer tube 2 is the water inlet, connected to the tap water supply, and equipped with a proportional-integral regulating valve 3; the other end is the water outlet, equipped with a hot water outlet sensor 4. The variable frequency compressor 5 has a power of at least 5 horsepower.

[0023] The heating and cooling system includes a water-side heat exchanger 10, a liquid receiver 11, a finned heat exchanger 12, and a fan 13. The water-side heat exchanger 10, liquid receiver 11, finned heat exchanger 12, and four-way valve 7 are sequentially connected via pipes to form a loop. The fan 13 is located on one side of the finned heat exchanger 12. Specifically, the pipes are coiled in a serpentine pattern inside the water-side heat exchanger 10 and outside the finned heat exchanger 12, allowing the refrigerant in the pipes to exchange heat with the water flowing in the water-side heat exchanger 10 and the finned heat exchanger 12. An electronic expansion valve 18 is installed between the liquid receiver 11 and the finned heat exchanger 12. A coil temperature sensor 19 is installed on the finned heat exchanger 12. The water-side heat exchanger 10 has an inlet at one end and an outlet at the other end. A unit circulating water pump 14 is installed on the inlet pipe. An inlet water temperature sensor 15 and a flow switch 17 are installed between the water-side heat exchanger 10 and the unit circulating water pump 14. An outlet water temperature sensor 16 is installed on the outlet pipe.

[0024] The working principle of the triple-heat pump system for hot water: Tap water flows in from the inlet end of the heat transfer tube 2. When the variable frequency compressor 5 is running, the heat on the compressor drive board 1 heats the tap water through the heat transfer tube 2. The proportional-integral regulating valve 3 adjusts the valve opening size by calculating the difference between the hot water outlet temperature and the target temperature detected by the hot water outlet sensor 4. The larger the temperature difference, the smaller the valve opens; the smaller the temperature difference, the larger the valve opens, thus achieving the effect of primary heating.

[0025] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A high-efficiency variable frequency triple-combined heat pump system, the triple-combined heat pump system comprising a compressor drive board (1) and a variable frequency compressor (5), the variable frequency compressor (5) being connected with the compressor drive board (1) to form a loop, characterized in that, The compressor drive board (1) is provided with a heat transfer tube (2). One end of the heat transfer tube (2) is connected to the tap water supply end and is provided with a proportional integral regulating valve (3). The other end is the water outlet end and is provided with a hot water outlet sensor (4).

2. The high-efficiency variable-frequency triple-generation heat pump system according to claim 1, characterized in that, The variable frequency compressor (5) has a power of at least 5 horsepower.

3. The high-efficiency variable-frequency triple-generation heat pump system of claim 1, wherein, The heat transfer tube (2) is spirally wound around the compressor drive plate (1).

4. The high-efficiency variable frequency triple-heat pump system according to claim 1, characterized in that, The triple-heat pump system also includes a vapor-liquid separator (6) and a four-way valve (7). The variable frequency compressor (5), vapor-liquid separator (6) and four-way valve (7) are connected in sequence through pipelines to form a loop.

5. A high-efficiency variable frequency triple-heat pump system according to claim 4, characterized in that, A return gas temperature sensor (8) is installed on the pipeline between the variable frequency compressor (5) and the gas-liquid separator (6), and an exhaust gas temperature sensor (9) is installed on the pipeline between the variable frequency compressor (5) and the four-way valve (7).

6. The high-efficiency variable-frequency triple-generation heat pump system of claim 4, wherein, The triple-heat pump system also includes a water-side heat exchanger (10), a liquid receiver (11), a finned heat exchanger (12), and a fan (13); the water-side heat exchanger (10), the liquid receiver (11), the finned heat exchanger (12), and the four-way valve (7) are connected in sequence through pipes to form a loop, and the fan (13) is located on one side of the finned heat exchanger (12).

7. The high-efficiency variable-frequency triple-generation heat pump system of claim 6, wherein, The water-side heat exchanger (10) has an inlet at one end and an outlet at the other end. A unit circulating water pump (14) is installed on the pipe of the inlet. An inlet water temperature sensor (15) and a flow switch (17) are installed between the water-side heat exchanger (10) and the unit circulating water pump (14). An outlet water temperature sensor (16) is installed on the pipe of the outlet.

8. The high-efficiency variable-frequency triple-generation heat pump system of claim 6, wherein, An electronic expansion valve (18) is provided between the liquid reservoir (11) and the finned heat exchanger (12).

9. The high-efficiency variable-frequency triple-generation heat pump system of claim 6, wherein, The finned heat exchanger (12) is equipped with a coil temperature sensor (19).

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