A control system for a heat pump heating apparatus

Abstract

The utility model provides a kind of control system of heat pump heating device, and the system includes controller module, data acquisition module and heating device being set on gas-liquid separator.Data acquisition module is used to collect ambient temperature, the temperature and pressure parameter of compressor suction and exhaust side, and send to controller module.When heat pump is in heating start or defrosting end transition heating state, and ambient temperature is lower than first preset temperature, controller module starts heating device to heat refrigerant in gas-liquid separator, and judges ambient temperature, suction superheat, exhaust superheat and operating time etc. condition in real time by multistage judging unit, any condition satisfies and closes heating device.The utility model can effectively accelerate liquid refrigerant gasification, shorten system transition time, improve heating efficiency, reduce back liquid phenomenon, prolong the service life of compressor, with control precision, response fast, high reliability advantage.

Description

Technical Field

[0001] This utility model relates to the field of air source heat pump technology, and in particular to an improved solution for a gas-liquid separator heating control system for heat pumps. Background Technology

[0002] When air source heat pumps start up in low-temperature environments or switch back from defrost mode to heating mode, a large amount of refrigerant often accumulates in the gas-liquid separator. This leads to insufficient superheating of the compressor suction, decreased heating performance, and a prolonged transition period, severely impacting user experience and equipment lifespan. Current technologies lack effective methods to quickly consume the liquid refrigerant, resulting in prolonged inefficient compressor operation and even liquid return, accelerating compressor wear.

[0003] Therefore, it is necessary to provide a new technical solution. Utility Model Content

[0004] The present invention aims to solve the above problems by providing a control system for a heat pump heating device that can quickly heat the liquid refrigerant in a gas-liquid separator, shorten the transition time, improve heating efficiency, and protect the compressor.

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

[0006] A control system for a heat pump heating device includes a controller module, a data acquisition module, and a heating device;

[0007] The data acquisition module is electrically connected to the controller module and is used to acquire temperature and pressure parameters in real time.

[0008] The heating device is installed on the gas-liquid separator and electrically connected to the controller module, and is used to heat the refrigerant;

[0009] When the controller module detects that the heat pump is in heating start-up or defrosting end and switching to heating mode, and the ambient temperature is lower than the first preset temperature, it starts the heating device and controls it to shut down through a multi-level judgment unit.

[0010] Preferably, the data acquisition module includes:

[0011] An ambient temperature sensor is used to detect the external ambient temperature.

[0012] The intake side temperature sensor and the exhaust side temperature sensor are used to detect the temperature on the intake side and the exhaust side of the compressor, respectively;

[0013] The suction-side pressure sensor and the exhaust-side pressure sensor are used to detect the pressure on the suction side and exhaust side of the compressor, respectively.

[0014] Furthermore, the decision unit in the controller module includes four decision units that are executed sequentially:

[0015] First judgment unit: Determines whether the ambient temperature is higher than the second preset temperature and continues for the first preset time;

[0016] Second judgment unit: Determines whether the intake superheat is higher than the third preset temperature and continues for the second preset time;

[0017] Third judgment unit: judges whether the exhaust superheat is higher than the fourth preset temperature and continues for the fourth preset time after the compressor running time exceeds the third preset time;

[0018] Fourth judgment unit: Determines whether the hot running time of the compression mechanism exceeds the fifth preset time.

[0019] If any judgment unit meets the condition, the heating device is turned off; otherwise, the process is repeated until the heating device is turned off.

[0020] This utility model has the following beneficial effects:

[0021] This invention directly heats the liquid refrigerant in the gas-liquid separator using a heating device, significantly shortening the transition time during heat pump startup or mode switching, improving heating efficiency, reducing the risk of liquid return, and extending the compressor's service life. It also features precise control, rapid response, and high reliability.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the control system of the heat pump heating device provided in this embodiment of the utility model. Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] like Figure 1 As shown, the control system of the heat pump heating device provided by this utility model includes a controller module 10, a data acquisition module 20, and a heating device 30.

[0027] The data acquisition module 20 includes multiple sensors for collecting parameters such as ambient temperature, compressor intake / exhaust temperature and pressure, and transmitting them to the controller module 10.

[0028] The heating device 30 is installed on the gas-liquid separator and is controlled by the controller module 10 to heat the refrigerant.

[0029] When the controller module 10 determines that the heat pump is in heating start-up or defrosting to heating state and the ambient temperature is lower than the set value, it starts the heating device 30 and controls its shutdown conditions through a multi-level judgment unit to achieve intelligent start-stop control.

[0030] Furthermore, the data acquisition module 20 includes: an ambient temperature sensor 21, an intake-side temperature sensor 22, an exhaust-side temperature sensor 23, an intake-side pressure sensor 24, and an exhaust-side pressure sensor 25.

[0031] The ambient temperature sensor 21 detects the ambient temperature outside the heat pump, the suction side temperature sensor 22 detects the suction side temperature of the compressor, and the exhaust side temperature sensor 23 detects the exhaust side temperature of the compressor. The suction side pressure sensor 24 detects the suction side pressure of the compressor, and the exhaust side pressure sensor 25 detects the exhaust side pressure of the compressor.

[0032] Furthermore, the judgment unit in the controller module 10 includes a first judgment unit 11, a second judgment unit 12, a third judgment unit 13, and a fourth judgment unit 14.

[0033] The first judgment unit 11 is used to determine whether the ambient temperature is higher than the second preset temperature and continues for a first preset time. If so, it sends a shutdown signal to the heating device 30.

[0034] If not, the second judgment unit 12 is activated to determine whether the superheat of the compressor's suction is higher than the third preset temperature and lasts for the second preset time. If so, the second judgment unit 12 sends a shutdown signal to the heating device 30.

[0035] If not, the third judgment unit 13 is activated to determine whether the exhaust superheat is greater than the fourth preset temperature and continues for the fourth preset time after the compressor running time is greater than the third preset time. If so, the third judgment unit 13 sends a shutdown signal to the heating device 30.

[0036] If not, the fourth judgment unit 14 is activated to determine whether the heating operation time of the compressor exceeds the fifth preset time. If so, the fourth judgment unit 14 sends a shutdown signal to the heating device 30.

[0037] If any judgment unit meets the condition, the heating device 30 is turned off; otherwise, the first judgment unit 11 to the fourth judgment unit 14 are executed in a loop until the heating device 30 is turned off.

[0038] The embodiments of this utility model are not limited to the specific embodiments described above. Those skilled in the art can make several modifications and improvements without departing from the principle of this utility model, and these should also be considered within the protection scope of this utility model.

Claims

1. A control system for a heat pump heating device, characterized in that, Includes a controller module, a data acquisition module, and a heating device. The data acquisition module is electrically connected to the controller module and is used to acquire temperature and pressure parameters and send them to the controller module. The heating device is installed on the gas-liquid separator and is electrically connected to the controller module, and is used to heat the refrigerant in the gas-liquid separator. The controller module is used to detect whether the ambient temperature is lower than a first preset temperature when the heat pump is in heating start-up or defrosting end-to-heating state. If it is lower, it sends a start signal to the heating device and activates the judgment unit to determine whether to send a shutdown signal.

2. The control system of the heat pump heating device according to claim 1, characterized in that, The data acquisition module includes an ambient temperature sensor, an intake-side temperature sensor, an exhaust-side temperature sensor, an intake-side pressure sensor, and an exhaust-side pressure sensor. The ambient temperature sensor is used to detect the ambient temperature outside the heat pump. The suction side temperature sensor is used to detect the suction side temperature of the compressor; The exhaust-side temperature sensor is used to detect the exhaust-side temperature of the compressor; The suction-side pressure sensor is used to detect the suction-side pressure of the compressor; The exhaust-side pressure sensor is used to detect the exhaust-side pressure of the compressor.

3. The control system of the heat pump heating device according to claim 2, characterized in that, The judgment unit includes a first judgment unit, a second judgment unit, a third judgment unit, and a fourth judgment unit; The first determination unit is used to determine whether the ambient temperature is higher than the second preset temperature and continues for a first preset time; if so, it sends a shutdown signal to the heating device. If not, the second judgment unit is activated to determine whether the inhalation superheat is higher than the third preset temperature and continues for the second preset time; if so, a shutdown signal is sent. If not, the third judgment unit is activated to determine whether the exhaust superheat is higher than the fourth preset temperature and continues for the fourth preset time after the compressor has been running for more than the third preset time. If so, a shutdown signal is sent. If not, the fourth judgment unit is activated to determine whether the hot running time of the compression mechanism exceeds the fifth preset time; if so, a shutdown signal is sent. If none of the above conditions are met, the first judgment unit to the fourth judgment unit are executed repeatedly until the heating device is turned off.

Images