Air-cooled heat pump air conditioning system

Abstract

The utility model relates to an air-cooled heat pump air-conditioning system which comprises a water outlet pipe with one open end and a water return pipe with one open end, a plurality of variable-frequency water pumps distributed at intervals in the axis direction of the water outlet pipe are arranged on one side of the water outlet pipe, and the variable-frequency water pumps are connected with the water outlet pipe through pipelines. A check valve is connected to a pipeline between the variable frequency water pump and the water outlet pipe in series, a water inlet of the variable frequency water pump is connected with an air cooling module unit through a pipeline, a water inlet of the air cooling module unit is connected with a water return pipe through a pipeline, and a pressure sensor is arranged on the side wall of the water outlet pipe in a penetrating mode. A first temperature sensor is arranged on the side wall of the open end of the water outlet pipe in a penetrating mode. A second temperature sensor is arranged on the side wall of the open end of the water return pipe in a penetrating mode. The novel air-cooled heat pump air-conditioning system has the characteristics of low energy consumption and low failure rate.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, in particular to an air-cooled heat pump air conditioning system. Background Art

[0002] As Figure 5 , the air-cooled heat pump air conditioning system of the prior art includes an outlet pipe 14 with one end open and a return pipe 13 with one end open. A plurality of air-cooled module units 16 are arranged on one side of the outlet pipe 14 at intervals along the axis direction of the outlet pipe 14. The air-cooled module units 16 are connected to the outlet pipe 14 through pipelines. A check valve 17 is connected in series on the pipeline between the air-cooled module units 16 and the outlet pipe 14. The water inlets of the air-cooled module units 16 are respectively connected to one end of a main pipe 18 through pipelines. The other end of the main pipe 18 is connected to a plurality of water pumps 19 through pipelines. The water inlets of the water pumps 19 are connected to the return pipe 13 through pipelines. A fourth temperature sensor 14 is arranged on the side wall of the open end of the outlet pipe 14, and a fifth temperature sensor 15 is arranged on the side wall of the open end of the return pipe 13.

[0003] The air-cooled heat pump air conditioning system of the prior art has the following disadvantages: during operation, the water temperature in the outlet pipe 14 is measured by the fourth temperature sensor 14, and the water temperature in the return pipe 13 is measured by the fifth temperature sensor 15. According to the temperature difference between the water in the outlet pipe 14 and the return pipe 13, it is decided how many air-cooled module units 16 are started for operation. No matter how many air-cooled module units 16 are started for operation, all the water pumps 19 need to be started. If some water pumps are closed, the water flow rate through the air-cooled module units 16 will decrease. When the water flow switch of the air-cooled module unit 16 detects insufficient water flow, an alarm device will be triggered and the air-cooled module unit 16 will be automatically shut down, and the subsequent air-cooled module units 16 cannot be started again; therefore, when the air-cooled heat pump air conditioning system of the prior art is in operation, all the water pumps 19 need to be kept running all the time, resulting in large loss of the service life of the water pumps; when the water pumps are started regularly in winter to prevent freezing, all the water pumps also need to be started, causing large energy consumption. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an air-cooled heat pump air conditioning system which has the characteristics of low energy consumption and low failure rate.

[0005] To solve the above technical problems, an air-cooled heat pump air conditioning system provided by the present utility model includes an outlet pipe with an open end and a return pipe with an open end. A plurality of variable-frequency water pumps are arranged on one side of the outlet pipe at intervals along the axis direction of the outlet pipe. The variable-frequency water pumps are connected to the outlet pipe through pipelines. A check valve is connected in series on the pipeline between the variable-frequency water pump and the outlet pipe. The water inlet of the variable-frequency water pump is connected to the air-cooled module unit through a pipeline. The water inlet of the air-cooled module unit is connected to the return pipe through a pipeline. A pressure sensor is inserted through the side wall of the outlet pipe. A first temperature sensor is inserted through the side wall at the open end of the outlet pipe. A second temperature sensor is inserted through the side wall at the open end of the return pipe.

[0006] Further preferably, the frequency converters of the variable-frequency water pumps, the pressure sensor, the first temperature sensor, the switch of the air-cooled module unit, and the second temperature sensor are respectively electrically connected to the controller; the controller can automatically control the operation of the air-cooled heat pump air conditioning system.

[0007] Further preferably, a pressure tank is further included. The pressure tank is connected to the outlet pipe through a pipeline; the pressure tank is used to balance the water volume and pressure in the outlet pipe.

[0008] Further preferably, a maintenance ball valve is connected in series on the pipeline between the check valve and the outlet pipe; the sphere of the maintenance ball valve can be conveniently disassembled, which is convenient for repairing and replacing parts, reduces the maintenance time, and lowers the maintenance cost.

[0009] Further preferably, the controller is a wired controller or a PLC; the controller can also be a single-chip microcomputer or a microcomputer.

[0010] Further preferably, a third temperature sensor for detecting the water temperature in the pump is arranged on the variable-frequency water pump. The third temperature sensor is electrically connected to the controller, and the controller is electrically connected to the switch of the variable-frequency water pump; when the third temperature sensor detects that the water temperature in the pump is too high, the controller automatically controls the variable-frequency water pump to close.

[0011] Advantages of the present utility model: During operation, the first pressure sensor is used to measure the water pressure in the outlet pipe, the first temperature sensor is used to measure the water temperature in the outlet pipe, and the second temperature sensor is used to measure the water temperature in the return pipe. According to the temperature difference between the water temperatures in the outlet pipe and the return pipe, the number of air-cooled modular units to be started is determined. Each group of air-cooled modular units and variable-frequency water pumps connected by pipelines need to be started or stopped simultaneously, that is, the number of air-cooled modular units to be started is the same as the number of variable-frequency water pumps to be started. The speed of the variable-frequency water pumps to be started is controlled by an inverter to ensure a constant water pressure in the outlet pipe and at the same time ensure that the water flow required by each variable-frequency water pump to be started is sufficient. In this way, it can prevent the alarm device from being triggered and will not cause the automatic shutdown of the air-cooled modular unit and its inability to restart; when the air-cooled heat pump air-conditioning system is operating, it is not necessary to start each variable-frequency water pump, which prolongs the service life of the variable-frequency water pump and reduces the failure rate of the variable-frequency water pump; in winter, only any one variable-frequency water pump needs to be started for antifreeze, saving a large amount of energy consumption; the novel air-cooled heat pump air-conditioning system has the characteristics of low energy consumption and low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To clearly illustrate the innovative principle of the utility model and its advantages compared with the existing air-cooled heat pump air-conditioning system, the following describes possible embodiments by means of non-limiting examples applying the principle with the aid of the drawings. In the figures:

[0013] Figure 1 is a schematic diagram of the air-cooled heat pump air-conditioning system of the present utility model;

[0014] Figure 2 is the front view of the air-cooled heat pump air-conditioning system;

[0015] Figure 3 is Figure 2 the right view of;

[0016] Figure 4 is Figure 2 the top view of;

[0017] Figure 5 is a schematic diagram of the air-cooled heat pump air-conditioning system of the prior art. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present novel with reference to the drawings in the embodiments of the present novel. Obviously, the described embodiments are only a part of the embodiments of the present novel, rather than all the embodiments.

[0019] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present novel without creative efforts belong to the scope of protection of the present novel.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0021] In the present invention, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Embodiment

[0022] Such as Figures 1-4 , an air-cooled heat pump air-conditioning system, including an outlet pipe 1 with an open end and a return pipe 2 with an open end. A plurality of variable-frequency water pumps 3 are arranged on one side of the outlet pipe 1 at intervals along the axis direction of the outlet pipe 1. The variable-frequency water pumps 3 are connected to the outlet pipe 1 through pipelines. A check valve 4 is connected in series on the pipeline between the variable-frequency water pumps 3 and the outlet pipe 1. The water inlet of the variable-frequency water pump 3 is connected to an air-cooled module unit 5 through a pipeline. The water inlet of the air-cooled module unit 5 is connected to the return pipe 2 through a pipeline. A pressure sensor 6 is penetrated through the side wall of the outlet pipe 1. A first temperature sensor 8 is penetrated through the side wall at the open end of the outlet pipe 1. A second temperature sensor 9 is penetrated through the side wall at the open end of the return pipe 2.

[0023] Preferably, the frequency converters of the variable-frequency water pumps 3, the pressure sensor 6, the first temperature sensor 8, the switch of the air-cooled module unit 5, and the second temperature sensor 9 are respectively electrically connected to the controller; the operation of the air-cooled heat pump air-conditioning system can be automatically controlled through the controller.

[0024] Preferably, it further includes a pressure tank 10, and the pressure tank 10 is connected to the outlet pipe 1 through a pipeline; the pressure tank 10 is used to balance the water volume and pressure in the outlet pipe 1.

[0025] Preferably, a maintenance ball valve 11 is connected in series on the pipeline between the check valve 4 and the outlet pipe 1; the sphere of the maintenance ball valve can be conveniently disassembled, which is convenient for repairing and replacing parts, reduces the maintenance time, and lowers the maintenance cost.

[0026] Preferably, the controller is a wired controller or a PLC; the controller can also be a single-chip microcomputer or a microcomputer.

[0027] Preferably, a third temperature sensor for detecting the water temperature inside the pump is provided on the variable-frequency water pump 3. The third temperature sensor is electrically connected to the controller, and the controller is electrically connected to the switch of the variable-frequency water pump 3. When the third temperature sensor detects that the water temperature inside the pump is too high, the controller automatically controls the variable-frequency water pump 3 to shut down.

[0028] During operation, the first pressure sensor 6 is used to measure the water pressure in the water outlet pipe 1, the first temperature sensor 8 is used to measure the water temperature in the water outlet pipe 1, and the second temperature sensor 9 is used to measure the water temperature in the water return pipe 2. The number of air-cooled modular units 5 to be turned on is determined based on the temperature difference between the water in the water outlet pipe 1 and the water in the water return pipe 2. Each group of air-cooled modular units 5 and variable-frequency water pumps 3 connected by pipelines need to be turned on or off simultaneously, that is, the number of air-cooled modular units 5 to be turned on is the same as the number of variable-frequency water pumps 3 to be turned on. The speed of the variable-frequency water pumps 3 to be turned on is controlled by the frequency converter to ensure that the water pressure in the water outlet pipe 1 is constant, and at the same time, the water flow required by each variable-frequency water pump 3 to be turned on is sufficient. In this way, it can prevent the alarm device from being triggered and will not cause the air-cooled modular unit 5 to automatically shut down and be unable to start again. When the air-cooled heat pump air-conditioning system is working, it is not necessary to turn on each variable-frequency water pump 3, which extends the service life of the variable-frequency water pump 3 and reduces the failure rate of the variable-frequency water pump 3. In winter, only any one variable-frequency water pump 3 needs to be turned on for anti-freezing, saving a large amount of energy consumption. The air-cooled heat pump air-conditioning system of this embodiment has the characteristics of low energy consumption and low failure rate.

[0029] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An air-cooled heat pump air-conditioning system, characterized in that: It includes a water outlet pipe (1) with one end open and a water return pipe (2) with one end open. It is characterized in that: on one side of the water outlet pipe (1), a plurality of variable-frequency water pumps (3) are arranged at intervals along the axial direction of the water outlet pipe (1). The variable-frequency water pumps (3) are connected to the water outlet pipe (1) through pipelines. A check valve (4) is connected in series on the pipeline between the variable-frequency water pump (3) and the water outlet pipe (1). The water inlet of the variable-frequency water pump (3) is connected to an air-cooled modular unit (5) through a pipeline. The water inlet of the air-cooled modular unit (5) is connected to the water return pipe (2) through a pipeline. A pressure sensor (6) is penetrated on the side wall of the water outlet pipe (1). A first temperature sensor (8) is penetrated on the side wall of the open end of the water outlet pipe (1). A second temperature sensor (9) is penetrated on the side wall of the open end of the water return pipe (2).

2. The air-cooled heat pump air-conditioning system according to claim 1, wherein: The frequency converter of the variable-frequency water pump (3), the pressure sensor (6), the first temperature sensor (8), the switch of the air-cooled modular unit (5), and the second temperature sensor (9) are respectively electrically connected to a controller.

3. The air-cooled heat pump air conditioning system according to claim 1, characterized in that: It further includes a pressure tank (10). The pressure tank (10) is connected to the water outlet pipe (1) through a pipeline.

4. The air-cooled heat pump air-conditioning system according to claim 1, wherein: A maintenance ball valve (11) is connected in series on the pipeline between the check valve (4) and the water outlet pipe (1).

5. The air-cooled heat pump air conditioning system according to claim 2, characterized in that: The controller is a line controller or a PLC.

6. The air-cooled heat pump air-conditioning system according to claim 1, wherein: A third temperature sensor for detecting the water temperature in the pump is arranged on the variable-frequency water pump (3). The third temperature sensor is electrically connected to the controller, and the controller is electrically connected to the switch of the variable-frequency water pump (3).

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