CN107143969A - A kind of temprature control method based on winter Xia Shuan end heat pump type air conditioning system - Google Patents

Abstract

The invention discloses a temperature control method based on a winter-summer double-terminal heat pump air-conditioning system. The winter-summer double-terminal heat pump air-conditioning system includes an air-source heat pump, an air-conditioning indoor unit, a temperature sensor installed indoors, a radiation heating terminal, a temperature sensor, Both the temperature sensor and the radiant heating terminal are connected to a controller; the controller receives the temperature signal from the temperature sensor and the temperature sensor in real time to adjust the operating state of the air source heat pump unit, that is, when ΔT≥ΔTs, where ΔT is the indoor temperature ΔTs is the set difference between the indoor temperature value and the set temperature value, and the cooling or heating capacity of the system can be increased by increasing the cooling capacity command of the unit, thereby reducing or increasing the indoor temperature ; When ΔT<ΔTs, maintain the current operating state of the unit. The invention can ensure the accuracy of air source heat pump regulation and the high efficiency and stability of system operation.

Description

A temperature control method based on double-terminal heat pump air conditioning system in winter and summer

technical field

The invention relates to the technical field of air conditioning, in particular to a temperature control system for a winter and summer double-terminal heat pump air conditioning system.

Background technique

In recent years, the heating technology combining air source heat pump and floor radiant terminal has been widely concerned and applied. Compared with the heating method of traditional indoor unit sending hot air, floor radiant heating can reduce the indoor temperature by 2°C compared with the traditional method when maintaining the same body temperature. Under the radiant floor heating method, the feet are warmed and the head is cooled, which is more comfortable. At present, the air source heat pump floor radiant heating technology mainly includes hot water type and refrigerant direct flow type. In summer, the indoor unit is used for cooling, and in winter, the indoor environment is adjusted through floor radiant terminal heating.

The temperature control system of the traditional air source heat pump collects the return air temperature as the indoor temperature parameter through the temperature sensor probe placed at the heat exchange coil inside the indoor unit and feeds it back to the air conditioning control system to adjust the operation of the compressor (on/off or frequency conversion). ). Floor radiant heating is different from the heat exchange method of indoor units. It mainly supplies heat to the room in the form of radiation, and the vertical layering of temperature is also different. If the temperature collected by the temperature sensor placed inside the indoor unit is still used as the feedback parameter , can not accurately reflect the thermal environment of the indoor personnel activity area, which will cause unreasonable temperature parameter feedback, resulting in misoperation of unit operation status adjustment, which will affect unit performance and indoor thermal comfort.

Contents of the invention

Aiming at the air-source heat pump winter and summer dual-terminal form, especially the air-source heat pump refrigerant direct-through floor radiation heating system, the present invention provides a temperature control system based on the winter-summer dual-terminal heat pump air-conditioning system, which can ensure the accuracy of air source heat pump regulation and Efficiency and stability of system operation.

In order to solve the existing problems and deficiencies in the existing heat pump air-conditioning control system and ensure the accuracy of regulation and the high efficiency and stability of the system operation, this invention proposes a temperature control method based on the winter and summer double-terminal heat pump air-conditioning system. The double-terminal heat pump air-conditioning system includes an air-source heat pump, an air-conditioning indoor unit, a temperature sensor and a radiation heating terminal installed indoors, and the temperature sensor, temperature sensor and radiation heating terminal of the air-conditioning indoor unit are all connected to a controller. The temperature sensor is 0.8-1.2m away from the indoor ground; the controller receives the temperature signal from the temperature sensor and the temperature sensor in real time to adjust the operating state of the air source heat pump unit to realize the regulation of the indoor temperature, including:

Temperature control in summer air-conditioning working conditions, cooling the room through the indoor unit, and sending the temperature collected by the temperature sensor as a feedback signal to the controller; the controller compares the feedback indoor temperature with the set value For comparison, when ΔT≥ΔTs, where ΔT is the measured difference between the indoor temperature value and the set temperature value, and ΔTs is the set difference value between the indoor temperature value and the set temperature value, the controller sends out a command to increase the cooling capacity of the unit Command to increase the cooling capacity of the system, thereby reducing the indoor temperature; when ΔT<ΔTs, maintain the current operating state of the unit; control the temperature in winter heating conditions, supply heat through the end of the radiant floor, and use the temperature to sense the temperature The temperature collected by the device is sent to the controller as a feedback signal; the controller compares the feedback indoor temperature with the set value, and when ΔT≥ΔTs, the controller sends an instruction to increase the heating capacity of the unit to increase the system heating capacity, thereby increasing the indoor temperature; when ΔT<ΔTs, maintain the current operating state of the unit.

Compared with prior art, the beneficial effect of the present invention is:

1. Different temperature control systems are adopted for different terminal forms, the collected parameters more truly reflect the thermal environment of the indoor personnel activity area, and the feedback parameters are more accurate to ensure indoor thermal comfort.

2. The highly matched temperature control system can reasonably and accurately regulate the operation status of the air conditioner, realize on-demand supply, and improve the efficiency and energy saving of the system.

Description of drawings

Figure 1-1 is a three-dimensional schematic diagram of the installation position of the temperature sensor and the temperature sensor in the temperature control system based on the winter and summer double-end heat pump air conditioning system of the present invention;

Figure 1-2 is a schematic plan view of the installation positions of the temperature sensor and the temperature sensor in the temperature control system shown in Figure 1-1.

Fig. 2 is a control flow chart of the temperature control system of the present invention.

Among them, 1-room enclosure structure, 2-air conditioner indoor unit, 21-temperature sensor probe, 3-radiant heating terminal, 31-temperature sensor.

detailed description

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the described specific embodiments are only for explaining the present invention, and are not intended to limit the present invention.

A temperature control method based on the winter and summer dual-terminal heat pump air conditioning system proposed by the present invention,

On the basis of the traditional air source heat pump temperature control system, a temperature sensor 31 matching the radiant heating terminal 3 in the floor radiant heating system is added to feed back the temperature parameters of the heating room in winter, and then regulate the air source heat pump. Its control function is mainly realized by the controller, the temperature sensor 21 and the temperature sensor 31 . The double-terminal heat pump air-conditioning system used in winter and summer includes an air-conditioning indoor unit 2, a temperature sensor 31 installed indoors and a radiant heating terminal 3, as shown in Figure 1-1 and Figure 1-2, and the size of the room is determined by the room enclosure structure 1. It is defined that the temperature sensing probe 21, temperature sensor 31, and radiant heating terminal 3 of the air-conditioning indoor unit 2 are all connected to a controller, wherein the temperature sensing probe 21 (that is, the indoor temperature measuring point of the air-conditioning working condition in summer) is located at the indoor unit 2 At the inner heat exchange coil, the temperature sensor 31 (i.e., the indoor temperature sensor in winter radiant heating conditions) is installed on the inner surface of the wall about 1 meter away from the ground; the temperature sensor 21 in summer or the temperature sensor in winter The temperature sensor 31 feeds back the collected indoor temperature parameters to the controller, and the controller receives the temperature signal from the temperature sensor 21 or the temperature sensor 31 in real time to adjust the operating state of the air source heat pump unit to realize the regulation of the indoor temperature. The specific control process is as follows:

As shown in Figure 2, for different terminal forms, the temperature collected at different locations is used as the feedback signal, and the corresponding temperature control system is used to regulate the system.

The temperature control process of the summer air-conditioning condition is: when the system is running under the cooling and air-conditioning condition, the indoor unit 2 is used to cool the room, the indoor unit 2 is used as the indoor heat exchange device, and the temperature sensor inside the indoor unit 2 21 The collected temperature is sent to the controller for feedback; the controller compares the feedback indoor temperature with the set value, and when ΔT≥ΔTs, where ΔT is the determination of the indoor temperature value and the set temperature value ΔTs is the set difference between the indoor temperature value and the set temperature value; the controller sends an instruction to increase the cooling capacity of the unit to increase the cooling capacity of the system, start up/increase the frequency to increase the cooling capacity of the system, and adjust the indoor temperature Adjust to reduce the indoor temperature; when ΔT<ΔTs, the controller does not act and maintain the current operating state of the unit; repeat the above process, through the real-time collection and comparison of indoor temperature parameters, the operating state of the system is adjusted according to the indoor thermal environment Timely regulation.

The temperature control process in winter heating conditions is: when the system is operating under refrigeration and air conditioning conditions, the radiant heating terminal 3 supplies heat to the room in the form of thermal radiation, which is collected by the temperature sensor 31 installed on the inner wall about 1 meter away from the floor. The indoor temperature is sent to the controller as a feedback signal; the controller compares the feedback indoor temperature with the set value, and when ΔT≥ΔTs, the controller sends an instruction to increase the heating capacity of the unit to increase the heating capacity of the system Heat, increase the heating capacity of the system by starting up/increasing the frequency, and adjust the indoor temperature to increase the indoor temperature; when ΔT<ΔTs, the controller does not operate and maintains the current operating state of the unit; the above process is cycled, and the indoor temperature is adjusted The parameters are collected and compared in real time, and the operating status of the system is adjusted in time according to the indoor thermal environment.

Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive. Under the enlightenment of the present invention, many modifications can be made without departing from the gist of the present invention, and these all belong to the protection of the present invention.

Claims (1)

1. a kind of temprature control method based on winter Xia Shuan end heat pump type air conditioning system, winter Xia Shuan end heat pump air conditioner system used System includes air source heat pump, indoor apparatus of air conditioner (2) and the temperature sensor (31) being disposed in the interior and radiant heating end (3), Characterized in that, the warming of the indoor apparatus of air conditioner (2) is popped one's head in (21), temperature sensor (31) and radiant heating end (3) are equal It is connected with a controller, the temperature sensor (31) is apart from 0.8~1.2m of flooring；The controller real-time reception warming The operating states of the units of air source heat pump is adjusted the temperature signal of probe (21) or temperature sensor (31), realizes indoor The regulation and control of temperature, including：

Summer air-conditioning working temperature is controlled, and is freezed by the indoor set (2) to indoor, with warming probe (21) institute The temperature of collection sends the controller to as feedback signal；The controller carries out the indoor temperature of feedback and setting value Contrast, as Δ T >=Δ Ts, wherein, Δ T is the measure difference of Indoor Temperature angle value and set temperature value, and Δ Ts is indoor temperature The setting difference of value and set temperature value；Controller sends the instruction for improving unit refrigerating capacity to increase the refrigerating capacity of system, from And reduce indoor temperature；As Δ T<During Δ Ts, the running status for maintaining unit current；

Heat supply in winter working temperature is controlled, and heat supply is carried out by the radiation floor end (3), with the temperature temperature detector (31) The temperature gathered sends the controller to as feedback signal；The controller enters the indoor temperature of feedback and setting value Row contrast, as Δ T >=Δ Ts, controller sends the instruction for improving unit heating capacity to increase the heating capacity of system, so as to carry High indoor temperature；As Δ T<During Δ Ts, the running status for maintaining unit current.