WO2020177272A1

WO2020177272A1 - Control method for air conditioning and floor heating integrated machine assembly

Info

Publication number: WO2020177272A1
Application number: PCT/CN2019/099737
Authority: WO
Inventors: 杨亚华; 周珩骏; 杨兵
Original assignee: 南京天加环境科技有限公司
Priority date: 2019-03-01
Filing date: 2019-08-08
Publication date: 2020-09-10
Also published as: CN109751787A

Abstract

A control method for an air conditioning and floor heating integrated machine assembly, comprising a refrigerant circulation loop formed by a compressor (1), an oil separator (2), a four-way valve (3), an indoor unit heat exchanger (9), an outdoor unit heat exchanger (4), an outdoor unit electronic expansion valve (5) and a gas-liquid separator (6); two ends of the indoor unit heat exchanger (9) being connected in parallel to a refrigerant pipeline port of a water-side heat exchanger (13), and a water path of the water-side heat exchanger (13) being communicated via a water pump (14) to a floor heating pipeline (16); two refrigerant ports of the water-side heat exchanger (13) respectively having disposed thereon a first solenoid valve (11) and a second solenoid valve (12); a gas pipe side of the indoor unit heat exchanger (9) being provided with a third solenoid valve (7); a first temperature probe (8) being installed at a side of an indoor unit; and a second temperature probe (15) being installed at a rear side of the water pump; the control method comprising: 1) a machine assembly turning-on, the first solenoid valve (11) and second solenoid valve (12) closing, the third solenoid valve (7) opening, and the machine assembly running an independent air conditioning mode; 2) using the first temperature probe (8) for detecting a real-time indoor temperature Tn, and comparing same to a set indoor temperature T1; when Tn+3℃≥T1, opening the first solenoid valve (11) and second solenoid valve (12), keeping the third solenoid valve (7) open, and the machine assembly entering an air conditioning and floor heating mixed operation state; 3) using the second temperature probe (15) for detecting a post-water-pump water temperature Ts, and comparing same to a set temperature T1; when Ts+5℃≥T1, keeping the first solenoid valve (11) and second solenoid valve (12) open, closing the third solenoid valve (7), and the machine assembly entering an independent floor heating operation state; 4) the machine assembly turning off, and returning to step 1. The method achieves sequential automatic switching between air conditioning and floor heating, greatly enhancing the utilizational efficiency of a machine assembly and improving user experience.

Description

Control method of air conditioner and floor heating integrated unit

Technical field

The invention relates to a control method of an air conditioner, in particular to a control method of an air conditioner and floor heating integrated unit.

Background technique

At present, multifunctional air-conditioning water heater products on the market, such as air-conditioning water heaters, air-conditioning floor heaters, etc., require more operating modes, so more valve bodies are required to switch the direction of refrigerant flow. Manufacturers use more valve bodies to control the operation of the refrigerant in the pipeline. If the solenoid valve is used in the use of the valve body, only one refrigerant direction switch can be guaranteed. The use of ball valves, etc., cannot perform automatic control and requires manual operation. The switch of the valve body. This not only makes the pipeline very complicated, the refrigerant flow path between the air conditioner and the floor heating is prone to collusion and small opening refrigerant bypass, the capacity is greatly reduced when operating alone, and the automatic switching between air conditioning and floor heating is not possible. Moreover, the existing unit can only turn on the floor heating when heating for a short period of time, and when the local heating temperature has not reached the user's demand, the user may shut down, which seriously affects the user experience.

Summary of the invention

The purpose of the present invention is to provide a control method of an air-conditioning and floor heating integrated unit in view of the shortcomings of the prior art, which can realize the automatic switching of the sequence of air conditioning and floor heating, greatly improving the use efficiency of the unit and improving user experience.

The technical scheme of the present invention is:

A control method of an air-conditioning and floor heating integrated unit, comprising a refrigerant circulation loop composed of a compressor, an oil separator, a four-way valve, an indoor unit heat exchanger, an outdoor unit heat exchanger, an outdoor unit electronic expansion valve, and a gas-liquid separator The two ends of the indoor unit heat exchanger are connected in parallel with the refrigerant pipe ports of the water-side heat exchanger, and the water path of the water-side heat exchanger is connected to the floor heating pipe through a water pump; The two refrigerant ports are respectively provided with a first solenoid valve and a second solenoid valve; the air pipe side of the indoor unit heat exchanger is provided with a third solenoid valve; the indoor unit side is equipped with a first temperature probe; the water pump is installed on the rear side The second temperature probe; the control method includes:

1) When the unit is turned on, the first solenoid valve and the second solenoid valve are closed, and the third solenoid valve is opened, and the unit runs in separate air conditioning mode;

2) The real-time indoor temperature Tn is detected by the first temperature probe and compared with the indoor set temperature T1; when Tn+3℃≥T1, open the first solenoid valve and the second solenoid valve, and keep the third solenoid valve open , The unit exits the independent air-conditioning mode and enters the air-conditioning and floor heating mixed transportation state;

3) Detect the water temperature Ts after the pump by the second temperature probe and compare it with the set temperature T1; when Ts+5℃≥T1, keep the first solenoid valve and the second solenoid valve open, and close the third solenoid valve, the unit Exit the air-conditioning and floor heating mixed transportation state and enter the independent floor heating operation state;

4) Shut down the unit and return to step 1).

Further, in the step 3), when the unit is defrosting in the single floor heating mode, if the defrosting time exceeds the set value, the third solenoid valve is opened.

Further, when the unit is in cooling operation in summer, the first solenoid valve and the second solenoid valve are always closed, and the third solenoid valve is always open.

The beneficial effects of the present invention:

The invention has reasonable design and convenient implementation, can realize the automatic switching of air conditioning and floor heating, greatly improves the use efficiency of the unit, and improves user experience.

Description of the drawings

Figure 1 is a schematic diagram of the system structure of the present invention.

Among them: 1- compressor; 2- oil separator; 3- four-way valve; 4- outdoor unit heat exchanger; 5- outdoor unit electronic expansion valve; 6-gas-liquid separator; 7- third solenoid valve; 8 -First temperature probe; 9- Indoor unit heat exchanger; 10- Indoor unit electronic expansion valve; 11- First solenoid valve; 12- Second solenoid valve; 13- Water side heat exchanger; 14- Water pump; 15- Second degree probe; 16-floor heating pipeline.

detailed description

The present invention will be further described below in conjunction with the drawings and embodiments.

As shown in Figure 1, an air-conditioning and floor heating integrated unit includes a compressor 1, an oil separator 2, a four-way valve 3, an indoor unit heat exchanger 9, an outdoor unit heat exchanger 4, an outdoor unit electronic expansion valve 5, and an air The refrigerant circulation circuit constituted by the liquid separator 6. The two ends of the indoor unit heat exchanger 9 are also connected in parallel with the refrigerant pipeline ports of the water-side heat exchanger 13. The specific connection line is: from the exhaust port of the compressor 1 through the oil separator 2 and the four-way valve 3 in turn, connect to the air pipe side of the indoor unit heat exchanger 9 and the air pipe side of the water side heat exchanger 13 at the same time. After the liquid pipe side of the indoor unit heat exchanger 9 and the water side heat exchanger 13 are brought out and collected, they pass through the outdoor unit heat exchanger 4, the four-way valve 3, and the gas-liquid separator 6, and finally connect to the compressor 1. The suction port forms a refrigerant circulation circuit. The water path of the water-side heat exchanger 13 is connected to the floor heating pipeline 16 through the water pump 14 so that the floor heating water can flow through the water-side heat exchanger 13 to exchange heat with the refrigerant. The two refrigerant ports of the water-side heat exchanger 13 are respectively provided with a first solenoid valve 11 and a second solenoid valve 12, which can control the opening and closing of the corresponding ports. A third solenoid valve 7 is provided on the air pipe side of the indoor unit heat exchanger, which can control the on and off of the refrigerant flow path of the indoor unit heat exchanger 9. A first temperature probe 8 is installed on the indoor unit side to be able to detect the indoor temperature. A second temperature probe 15 is installed on the rear side of the water pump 14, which can detect the temperature of the outlet water of the water side heat exchanger 13. The indoor unit heat exchanger 9 is in multiple groups, and each group is provided with an indoor unit electronic expansion valve 10 to flexibly control the working state of the indoor unit heat exchangers of different groups.

The control method of the air-conditioning and floor heating integrated unit includes the following steps:

1) The unit is turned on, the first solenoid valve and the second solenoid valve are closed, and the third solenoid valve is opened, and the unit runs in a separate air-conditioning mode; the refrigerant flow direction is: A-E-D-C-B-F-G;

2) The real-time indoor temperature Tn is detected by the first temperature probe and compared with the indoor set temperature T1; when Tn+3℃≥T1, open the first solenoid valve and the second solenoid valve, and keep the third solenoid valve open , The unit exits the single air-conditioning mode and enters the air-conditioning and floor heating mixed transportation state; the refrigerant flow is two paths, one is for air conditioning: AEDBFG, and the other is for floor heating: AIHCBFG;

3) Detect the water temperature Ts after the pump by the second temperature probe and compare it with the set temperature T1; when Ts+5℃≥T1, keep the first solenoid valve and the second solenoid valve open, and close the third solenoid valve, the unit Exit the air-conditioning and floor heating mixed transportation state, and enter the independent floor heating operation state; the refrigerant flow direction is: AIHCBFG;

4) When the user no longer needs to use floor heating, the unit shuts down and returns to step 1) to restart the control process.

When the air-conditioning and floor heating integrated unit of the present invention needs to defrost, it can be performed in different modes. Specifically, in the single air-conditioning mode and the air-conditioning and floor heating mixed mode, the four-way valve is switched to make the refrigerant flow in the reverse direction for defrosting; in the single floor heating mode, the refrigerant is first flowed in the reverse direction. If the defrosting time exceeds the set value, the third solenoid valve is opened, and the air-conditioning side and the water side are used for heating together to speed up the defrosting speed.

When the air-conditioning and floor heating integrated unit of the present invention is used in summer, the first solenoid valve and the second solenoid valve can be manually controlled to close, and only the third solenoid valve is kept open, so that the water side heat exchanger and the floor heating module do not participate in operation.

The invention adopts electromagnetic valve for control in structure, simplifies the structure, improves the convenience and operation efficiency of control, and can realize the automatic switching of the sequence of air conditioning and floor heating in the heating environment in winter, effectively reducing the fluctuation of room temperature Thus, the user experience is greatly improved.

The parts not involved in the present invention are the same as the prior art or can be implemented by the prior art.

Claims

A control method of an air-conditioning and floor heating integrated unit, comprising a refrigerant circulation loop composed of a compressor, an oil separator, a four-way valve, an indoor unit heat exchanger, an outdoor unit heat exchanger, an outdoor unit electronic expansion valve, and a gas-liquid separator The two ends of the indoor unit heat exchanger are connected in parallel with the refrigerant pipeline port of the water side heat exchanger, and the water path of the water side heat exchanger is connected to the floor heating pipeline through a water pump; characterized in that the water side heat exchanger The two refrigerant ports of the heat exchanger are respectively provided with a first solenoid valve and a second solenoid valve; the indoor unit heat exchanger air pipe side is provided with a third solenoid valve; the indoor unit side is equipped with a first temperature probe; the water pump A second temperature probe is installed on the rear side; the control method includes:

1) When the unit is turned on, the first solenoid valve and the second solenoid valve are closed, and the third solenoid valve is opened, and the unit runs in separate air conditioning mode;

2) The real-time indoor temperature Tn is detected by the first temperature probe and compared with the indoor set temperature T1; when Tn+3℃≥T1, open the first solenoid valve and the second solenoid valve, and keep the third solenoid valve open , The unit exits the independent air-conditioning mode and enters the air-conditioning and floor heating mixed transportation state;

3) Detect the water temperature Ts after the pump by the second temperature probe and compare it with the set temperature T1; when Ts+5℃≥T1, keep the first solenoid valve and the second solenoid valve open, and close the third solenoid valve, the unit Exit the air-conditioning and floor heating mixed transportation state and enter the independent floor heating operation state;

4) Shut down the unit and return to step 1).
The control method of an air-conditioning and floor heating integrated unit according to claim 1, wherein in step 3), when the unit is defrosting in the single floor heating mode, if the defrosting time exceeds the set value, the first Three solenoid valves.
The control method of an air-conditioning and floor heating integrated unit according to claim 1, wherein when the unit is in cooling operation in summer, the first solenoid valve and the second solenoid valve are always closed, and the third solenoid valve is always open.