A type of energy storage air conditioner

Abstract

This invention provides an energy storage air conditioner, comprising an air-cooled heat pump, an energy accumulator, a heat release pump, a heat exchanger, a circulating pump, and four control valves. This invention can provide cooling (heating) directly through the air-cooled heat pump, or through the energy accumulator, or in combination with the energy accumulator. Furthermore, combined cooling (heating) can be further divided into series and parallel systems. In the series system, the air-cooled heat pump is used upstream of the energy accumulator, which improves the efficiency of the air-cooled heat pump. Series and parallel systems each have their advantages and disadvantages. For example, the series system can achieve cooling (heating) with a large temperature difference and reduce the flow rate of the water pump (circulating pump), but some traditional air conditioning terminal equipment does not meet the conditions for large temperature difference operation. The parallel system can improve the heat release capacity of the energy accumulator.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration technology, and in particular relates to an energy storage air conditioner. Background Technology

[0002] Energy storage air conditioning systems are an energy-saving technology that stores cold or heat and releases it when needed. Its core value lies in storing energy during off-peak hours and releasing it during peak hours, thus achieving "peak shaving and valley filling," reducing operating costs, and balancing the grid load.

[0003] Based on the type of energy storage medium, the mainstream technologies are divided into water-based cooling (using the sensible heat of water) and ice-based cooling (using the latent heat of phase change of ice). Both require the coordinated operation of a refrigeration unit (such as an air-cooled heat pump) and an energy storage device (such as a water storage tank or ice storage tank).

[0004] Existing combined energy supply modes for energy storage air conditioning systems are mainly divided into series and parallel modes, but both have inherent drawbacks:

[0005] Series system: The chiller unit and the accumulator operate in series, with water flowing sequentially through the unit and the accumulator (usually using an "upstream of unit" mode). Its advantages include the ability to provide cooling (heating) over large temperature differences, reducing water pump flow and improving heat pump efficiency. However, its disadvantages include: some traditional air conditioning terminal equipment cannot adapt to large temperature difference conditions, and the accumulator's cooling (heating) release capacity is limited by the fixed structure of the series path, making it difficult to flexibly respond to load fluctuations.

[0006] Parallel system: The chiller and accumulator operate in parallel, with two independent cooling sources delivered to the air conditioning terminals. Its advantage is that it maximizes the instantaneous cooling (heating) capacity of the accumulator, adapting to high-load demand scenarios. However, its disadvantages include: due to the parallel and split water flow, the system temperature difference is small, leading to increased water pump energy consumption, and it cannot utilize the efficient heat exchange characteristics of the series mode.

[0007] Therefore, it is desirable to provide an energy storage air conditioner that can conveniently and quickly switch between the operation of the refrigeration unit alone, the operation of the energy storage unit alone, the operation of the refrigeration unit and the energy storage unit in series, and the operation of the refrigeration unit and the energy storage unit in parallel. Utility Model Content

[0008] The purpose of this utility model is to provide an energy storage air conditioner to address the above-mentioned technical problems.

[0009] Therefore, the above-mentioned objective of this utility model is achieved through the following technical solution:

[0010] An energy storage air conditioner includes an air-cooled heat pump, an energy accumulator, a heat release pump, a heat exchanger, a circulating pump, a first control valve, a second control valve, and a third control valve.

[0011] The energy storage air conditioner has an inlet main pipe and an outlet main pipe. The inlet main pipe is connected to the inlet pipe of the air-cooled heat pump and the inlet pipe of the heat exchanger, respectively. The outlet main pipe is connected to the outlet pipe of the air-cooled heat pump and the outlet pipe of the heat exchanger, respectively. A circulation pump is installed on the inlet main pipe.

[0012] The air-cooled heat pump is equipped with a first control valve on its inlet pipe and a second control valve on its outlet pipe.

[0013] A third control valve is provided on the inlet pipe of the heat exchanger; a cooling and heat release pump is provided on the outlet pipe of the accumulator, and the outlet pipe and inlet pipe of the accumulator are respectively connected to the heat exchanger;

[0014] The energy storage air conditioner is also equipped with a series pipeline, one end of which is connected to the outlet pipeline of the air-cooled heat pump, and the other end of which is connected to the inlet pipeline of the heat exchanger. A fourth control valve is provided on the series pipeline.

[0015] The connection between the series pipeline and the outlet pipeline of the air-cooled heat pump is located between the second control valve and the air-cooled heat pump.

[0016] The connection between the series pipeline and the inlet pipeline of the heat exchanger is located between the third control valve and the heat exchanger.

[0017] While adopting the above technical solutions, this utility model may also adopt or combine the following technical solutions:

[0018] As a preferred technical solution of this utility model: the energy storage device is a water energy storage device, an ice energy storage device, or an energy storage device with phase change material.

[0019] As a preferred technical solution of this utility model, the cooling and heating pump is a variable frequency pump.

[0020] As a preferred technical solution of this utility model, the heat exchanger is a plate heat exchanger, a shell-and-tube heat exchanger, or a coaxial heat exchanger.

[0021] As a preferred embodiment of this utility model, the first control valve, the second control valve, the third control valve, and the fourth control valve are electric butterfly valves, solenoid valves, or electric ball valves.

[0022] This invention provides an energy storage air conditioner that can provide cooling (heating) directly through an air-cooled heat pump, through an energy storage device, or in combination with an air-cooled heat pump. Furthermore, combined cooling (heating) can be further divided into series and parallel systems. In the series system, an air-cooled heat pump is used upstream of the energy storage device, which improves the efficiency of the air-cooled heat pump. Series and parallel systems each have their advantages and disadvantages. For example, a series system can achieve cooling (heating) with a large temperature difference and reduce the flow rate of the water pump (circulating pump), but some traditional air conditioning terminal equipment does not meet the requirements for large temperature differences. A parallel system can improve the cooling (heating) release capacity of the energy storage device. Attached Figure Description

[0023] Figure 1 The illustration shows the energy storage air conditioner provided by this utility model. Detailed Implementation

[0024] The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

[0025] An energy storage air conditioner includes an air-cooled heat pump 110, an energy storage device 120, a heat release pump 130, a heat exchanger 140, a circulating pump 150, a first control valve V1, a second control valve V2, and a third control valve V3.

[0026] The energy storage air conditioner has an inlet main pipe and an outlet main pipe. The inlet main pipe is connected to the inlet pipe of the air-cooled heat pump 110 and the inlet pipe of the heat exchanger 140, respectively. The outlet main pipe is connected to the outlet pipe of the air-cooled heat pump 110 and the outlet pipe of the heat exchanger 140, respectively. A circulation pump 150 is installed on the inlet main pipe.

[0027] The air-cooled heat pump 110 is equipped with a first control valve V1 on the water inlet pipe and a second control valve V2 on the water outlet pipe.

[0028] A third control valve V3 is provided on the inlet pipe of heat exchanger 140; a cooling and heat release pump 130 is provided on the outlet pipe of accumulator 120, and the outlet pipe and inlet pipe of accumulator 120 are respectively connected to heat exchanger 140.

[0029] The energy storage air conditioner is also equipped with a series pipeline. One end of the series pipeline is connected to the outlet pipeline of the air-cooled heat pump 110, and the other end of the series pipeline is connected to the inlet pipeline of the heat exchanger 140. A fourth control valve V4 is provided on the series pipeline.

[0030] The connection between the series pipeline and the outlet pipeline of the air-cooled heat pump 110 is located between the second control valve V2 and the air-cooled heat pump 110.

[0031] The connection between the series pipeline and the inlet pipeline of heat exchanger 140 is located between the third control valve V3 and heat exchanger 140.

[0032] The circulating pump 150, the first control valve V1, the air-cooled heat pump 110, the second control valve V2, and the air-cooled heat pump form a separate cooling (heating) cycle to the air conditioning terminal.

[0033] The cooling (heating) cycle consisting of the heat release pump 130, heat exchanger 140, and accumulator 120, together with the cooling (heating) cycle formed by the circulation pump 150, third control valve V3, heat exchanger 140, and air conditioning terminal, forms a separate cooling (heating) cycle for the accumulator.

[0034] The outlet of the circulating pump 150 is divided into two paths: one path passes through the first control valve V1, the air-cooled heat pump 110, and the second control valve V2, and the other path passes through the third control valve V3 and the heat exchanger 140. The two paths merge and form a cooling (heating) cycle at the air conditioning terminal. Together with the cooling (heating) cycle composed of the heat release pump 130, the heat exchanger 140, and the energy storage device 120, they form a parallel cooling (heating) cycle of the air-cooled heat pump 110 and the energy storage device 120.

[0035] The outlet of the circulating pump 150 passes through the first control valve V1, the air-cooled heat pump 110, the fourth control valve V4, the heat exchanger, and the air conditioning terminal to form a cooling (heating) cycle. Together with the cooling (heating) cycle composed of the heat release pump 130, the heat exchanger 140, and the accumulator 120, a series combined cooling (heating) cycle of the air-cooled heat pump 110 and the accumulator 120 is formed.

[0036] In this embodiment, the energy storage device 120 is a water energy storage device, an ice energy storage device, or an energy storage device with phase change material.

[0037] In this embodiment, the cooling and heating pump 130 is a variable frequency pump.

[0038] In this embodiment, the heat exchanger 140 is a plate heat exchanger, a shell-and-tube heat exchanger, or a double-tube heat exchanger.

[0039] In this embodiment: the first control valve V1, the second control valve V2, the third control valve V3, and the fourth control valve V4 are electric butterfly valves, solenoid valves, or electric ball valves.

[0040] The above specific embodiments are used to explain and illustrate the present utility model, and are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made to the present utility model within the spirit and protection scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. An energy storage air conditioner, characterized in that: It includes air-cooled heat pumps, energy accumulators, heat release pumps, heat exchangers, circulating pumps, first control valves, second control valves, and third control valves; The energy storage air conditioner has an inlet main pipe and an outlet main pipe. The inlet main pipe is connected to the inlet pipe of the air-cooled heat pump and the inlet pipe of the heat exchanger, respectively. The outlet main pipe is connected to the outlet pipe of the air-cooled heat pump and the outlet pipe of the heat exchanger, respectively. A circulation pump is installed on the inlet main pipe. The air-cooled heat pump is equipped with a first control valve on its inlet pipe and a second control valve on its outlet pipe. A third control valve is provided on the inlet pipe of the heat exchanger; a cooling and heat release pump is provided on the outlet pipe of the accumulator, and the outlet pipe and inlet pipe of the accumulator are respectively connected to the heat exchanger; The energy storage air conditioner is also equipped with a series pipeline, one end of which is connected to the outlet pipeline of the air-cooled heat pump, and the other end of which is connected to the inlet pipeline of the heat exchanger. A fourth control valve is provided on the series pipeline. The connection between the series pipeline and the outlet pipeline of the air-cooled heat pump is located between the second control valve and the air-cooled heat pump. The connection between the series pipeline and the inlet pipeline of the heat exchanger is located between the third control valve and the heat exchanger.

2. The energy storage air conditioner according to claim 1, characterized in that: The energy storage device is a water energy storage device, an ice energy storage device, or an energy storage device with phase change material.

3. The energy storage air conditioner according to claim 1, characterized in that: The heat release pump is a variable frequency pump.

4. The energy storage air conditioner according to claim 1, characterized in that: The heat exchanger is a plate heat exchanger, a shell-and-tube heat exchanger, or a double-tube heat exchanger.

5. The energy storage air conditioner according to claim 1, characterized in that: The first control valve, the second control valve, the third control valve, and the fourth control valve are electric butterfly valves, solenoid valves, or electric ball valves.

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