Ground source heat pump air conditioner with heat recovery function

Abstract

The invention discloses a ground source heat pump air conditioner with a heat recovery function, which comprises a ground source side heat exchanger, a heat pump host and an indoor heat exchanger which are sequentially connected through pipelines, and further comprises a heat recovery structure, the heat recovery structure comprises a monitoring system used for measuring the indoor temperature and a storage structure used for storing heat. By means of the mode, the ground source heat pump air conditioner with the heat recovery function is internally provided with the heat recovery structure, and the purpose of saving energy can be achieved through heat recovery under the condition that the working frequency of the heat pump main machine is not changed.

Description

Technical Field

[0001] The invention belongs to the field of floor heating, and in particular relates to a ground source heat pump air conditioner with a heat recovery function. Background Art

[0002] Geothermal heat pump air conditioners are mainly composed of a ground source side heat exchanger, a heat pump main unit and an indoor heat exchanger connected by pipes. They can effectively utilize geothermal resources to achieve the dual functions of heating in winter and cooling in summer.

[0003] However, during use, when the heat energy delivered by the indoor heat exchanger exceeds the original set amount, it is necessary to adjust it by changing the operating frequency of the heat pump host. However, variable frequency requires more electricity consumption than fixed frequency. Although this method can reduce heat loss, it will also increase losses in terms of use costs, which is not conducive to the development of modern society. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a ground source heat pump air conditioner with a heat recovery function, which can achieve energy saving by recovering heat without changing the working frequency of the heat pump host.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: a ground source heat pump air conditioner with heat recovery function, comprising a ground source side heat exchanger, a heat pump main unit and an indoor heat exchanger, wherein the ground source side heat exchanger, the heat pump main unit and the indoor heat exchanger are sequentially connected by pipelines, and also comprises a heat recovery structure;

[0006] The heat recovery structure includes a monitoring system for measuring indoor temperature and a storage structure for heat storage.

[0007] In a preferred embodiment of the present invention, the monitoring system includes a plurality of temperature sensors, and the plurality of temperature sensors are installed indoors.

[0008] In a preferred embodiment of the present invention, the storage structure includes a plurality of first circulation pipes and a buffer water tank, the plurality of first circulation pipes are connected to the buffer water tank in parallel, and one side of the first circulation pipe extends into the indoor heat exchanger.

[0009] In a preferred embodiment of the present invention, one end of the first plurality of circulating pipes is connected to the buffer water tank via a confluence valve, and a first water pump is installed between the confluence valve and the buffer water tank.

[0010] In a preferred embodiment of the present invention, the other end of the buffer water tank is connected to the heat pump host through a second circulation pipe, and a second water pump is installed on the second circulation pipe.

[0011] In a preferred embodiment of the present invention, the ground source side heat exchanger includes a plurality of pipelines buried underground, and the structures of the pipelines include U-type and spiral type.

[0012] In a preferred embodiment of the present invention, the indoor heat exchanger is a fan coil unit.

[0013] In a preferred embodiment of the present invention, the heat pump host is composed of a compressor, an evaporator, an expansion valve and a condenser, and the compressor, the evaporator, the expansion valve and the condenser are connected in sequence to form a loop.

[0014] The beneficial effects of the present invention are as follows: the present invention is a ground source heat pump air conditioner with a heat recovery function, wherein a heat recovery structure is arranged inside the air conditioner, and the purpose of energy saving can be achieved by recovering heat without changing the working frequency of the heat pump host. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The schematic diagram is a structural diagram of a ground source heat pump air conditioner with heat recovery function.

[0016] The components in the attached drawings are marked as follows: 1. Ground source side heat exchanger; 2. Heat pump main unit; 3. Indoor heat exchanger; 4. First circulation pipeline; 5. Buffer water tank; 6. Second circulation pipeline; 7. First water pump; 8. Second water pump. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0018] See also Figure 1 The embodiment of the present invention includes: a ground source heat pump air conditioner with heat recovery function, including a ground source side heat exchanger 1, a heat pump main unit 2 and an indoor heat exchanger 3, wherein the ground source side heat exchanger 1, the heat pump main unit 2 and the indoor heat exchanger 3 are sequentially connected by pipelines, and also includes a heat recovery structure, which can achieve energy saving by recovering heat without changing the working frequency of the heat pump main unit 2.

[0019] The heat recovery structure includes a monitoring system for measuring indoor temperature and a storage structure for heat storage.

[0020] The monitoring system includes a plurality of temperature sensors, which are installed indoors and used to monitor the indoor temperature.

[0021] The temperature sensor transmits the monitored temperature to the control system. When the actually provided temperature is greater than the set required temperature, the control system turns on the first water pump 7 on the first circulation pipe 4, allowing the water in the buffer water tank 5 to flow, thereby taking away part of the temperature in the indoor heat exchanger 3 until the actually provided temperature is the same as the set required temperature, and then turns off the first water pump 7. At this time, the buffer water tank 5 is used for insulation.

[0022] The storage structure includes a plurality of first circulation pipes 4 and a buffer water tank 5. The plurality of first circulation pipes are connected to the buffer water tank 5 in parallel. One side of the first circulation pipe 4 extends into the indoor heat exchanger 3. The parallel arrangement increases the heating area of ​​the first circulation pipe 4, thereby accelerating the heat exchange rate.

[0023] One end of the first circulation pipes is connected to the buffer water tank 5 through a confluence valve. A first water pump 7 is installed between the confluence valve and the buffer water tank 5. The first water pump 7 is used for the circulation of water between the first circulation pipe 4 and the buffer water tank 5.

[0024] The other end of the buffer water tank 5 is connected to the heat pump host 2 through a second circulation pipe 6 , and a second water pump 8 is installed on the second circulation pipe 6 . The second water pump 8 is used for circulating water between the second circulation pipe 6 and the buffer water tank 5 .

[0025] The first water pump 7 and the second water pump 8 can be started at the same time.

[0026] The working principle of the second circulation pipeline 6 is the same as that of the ground source side heat exchanger 1, so that the recovered heat is reused in the heat pump main unit 2, thereby achieving energy saving by recovering heat without changing the working frequency of the heat pump main unit 2.

[0027] The ground source side heat exchanger 1 includes a plurality of pipes buried underground. The structures of the pipes include U-type and spiral type, which can increase the contact area with the soil and improve the heat exchange efficiency.

[0028] The indoor heat exchanger 3 is a fan coil unit, which can provide heating in winter and cooling in summer.

[0029] The heat pump host 2 is composed of a compressor, an evaporator, an expansion valve and a condenser. The compressor, the evaporator, the expansion valve and the condenser are connected in sequence to form a loop.

[0030] The compressor is responsible for compressing the refrigerant to increase its temperature and pressure.

[0031] The evaporator is used for the refrigerant to absorb indoor heat in the evaporator to reduce the indoor temperature.

[0032] The condenser is used for the refrigerant to release heat in the condenser, and the heat can be transferred to a ground source or the air.

[0033] The expansion valve is used to adjust the flow rate and pressure of the refrigerant and control the evaporation and condensation process of the refrigerant.

[0034] Compared with the prior art, the present invention is a ground source heat pump air conditioner with a heat recovery function. The air conditioner is provided with a heat recovery structure, which can achieve energy saving by recovering heat without changing the working frequency of the heat pump host.

[0035] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A ground source heat pump air conditioner with heat recovery function, comprising a ground source side heat exchanger, a heat pump main unit and an indoor heat exchanger, wherein the ground source side heat exchanger, the heat pump main unit and the indoor heat exchanger are sequentially connected by pipelines, characterized in that: Also included is a heat recovery structure; The heat recovery structure includes a monitoring system for measuring indoor temperature and a storage structure for heat storage.

2. A ground source heat pump air conditioner with heat recovery function according to claim 1, characterized in that: The monitoring system comprises a plurality of temperature sensors, and the plurality of temperature sensors are installed indoors.

3. A ground source heat pump air conditioner with heat recovery function according to claim 2, characterized in that: The storage structure includes a plurality of first circulation pipes and a buffer water tank. The plurality of first circulation pipes are connected to the buffer water tank in parallel, and one side of the first circulation pipe extends into the indoor heat exchanger.

4. A ground source heat pump air conditioner with heat recovery function according to claim 3, characterized in that: One end of the first plurality of circulation pipes is connected to the buffer water tank via a confluence valve, and a first water pump is installed between the confluence valve and the buffer water tank.

5. A ground source heat pump air conditioner with heat recovery function according to claim 4, characterized in that: The other end of the buffer water tank is connected to the heat pump host through a second circulation pipeline, and a second water pump is installed on the second circulation pipeline.

6. The ground source heat pump air conditioner with heat recovery function according to claim 1, characterized in that: The ground source side heat exchanger includes a plurality of pipelines buried underground, and the structures of the pipelines include U-type and spiral type.

7. The ground source heat pump air conditioner with heat recovery function according to claim 1, characterized in that: The indoor heat exchanger is a fan coil unit.

8. The ground source heat pump air conditioner with heat recovery function according to claim 1, characterized in that: The heat pump host is composed of a compressor, an evaporator, an expansion valve and a condenser. The compressor, the evaporator, the expansion valve and the condenser are connected in sequence to form a loop.

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