Air-conditioning system, air-conditioner and control method thereof

[0032] The present invention will be further described in detail below with reference to the drawings and specific embodiments, but it is not intended to limit the present invention.

[0033] See Figure 1-3 As shown, the present invention discloses an air conditioning system, which includes a compressor 1, a gas-liquid separator 2, a four-way valve 3, an outdoor heat exchanger 4, a throttling device 5, the compressor 1, a gas-liquid separator 2. The four-way valve 3, the outdoor heat exchanger 4, and the throttling device 5 are set on the outdoor side to become the outdoor unit of the air conditioner; it also includes the indoor side. The indoor side has at least two indoor units, at least one of which is indoor The unit is equipped with radiant heat exchangers. There are one or more indoor units with radiant heat exchangers. The indoor units with ordinary heat exchangers can also be set to one or more units, which together constitute the indoor unit of the air conditioning system of the present invention. On the other hand, compared with the existing radiant plate and heat exchanger installed on the same air conditioner, the radiant heat exchanger and the ordinary heat exchanger are installed separately on different indoor units to achieve separate control and diversified control methods. Different indoor environment temperature conditions can realize the refrigerant flow of radiant heat exchanger and ordinary heat exchanger, realize the combined control of different working conditions, and improve the energy-saving effect.

[0034] Preferably, there are two indoor units, the indoor units include a first indoor unit 7, a second indoor unit 8, the first indoor unit 7 is provided with a radiation heat exchanger 71, and the second indoor unit 8 The installation position of the second indoor unit 8 with the first heat exchanger 81 is higher than the installation position of the first indoor unit 7; for example, currently common air conditioners, such as wall-mounted air conditioners, are installed in the room or On the wall of the hall, the installation method of the second indoor unit 8 of the present invention is the same as that of an ordinary air conditioner, and the installation position of the first indoor unit 7 is lower than the installation position of the second indoor unit 8, so that during heating , The hot air will not directly blow to the upper body parts such as the human head, improving the comfort of the human body.

[0035] Preferably, at least one indoor unit with a radiant heat exchanger is set on the ground. The indoor unit with a radiant heat exchanger can also be understood as a radiator with a radiation heat dissipation function. When heating, it has radiation heat exchange. The indoor unit of the device is installed near the floor in the room or hall, or it can be directly installed on the floor or buried underground. It can be realized that the hot air can be blown from the feet of the human body and warm from the feet during heating. The effect of better comfort.

[0036] Preferably, the fan 9 is also included. The wind of the fan 9 is blown toward the radiant heat exchanger. In order to enhance the heating effect of the radiant heat exchanger, the fan 9 is added. At the same time, breeze is used to strengthen air convection, and the heating effect is better. , Since the windshield of the fan is a low windshield, the noise is low.

[0037] Preferably, when the air-conditioning system is in a cooling mode, a first electromagnetic control valve 11 is provided upstream of the radiant heat exchanger 71, which is used to control the flow of the refrigerant, and can even be closed to prevent the circulation of the refrigerant. According to the refrigeration requirements, the refrigerant is allowed to pass through the second heat exchanger 81 as much as possible, and the second heat exchanger 81 assumes most of the refrigeration requirements.

[0038] Preferably, when the air-conditioning system is in heating mode, a second electromagnetic control valve is provided upstream of the first heat exchanger 81 for controlling the flow of the refrigerant, or even controllable shutdown to prevent the circulation of the refrigerant, According to the heating demand, the refrigerant can pass through the radiant heat exchanger 71 as much as possible, and the radiant heat exchanger 71 is responsible for most of the heating requirements.

[0039] According to another embodiment of the present invention, an air conditioner is provided, including the above-mentioned air conditioning system.

[0040] See Figure 4-11 According to another embodiment of the present invention, there is provided a control method of an air conditioner, including the above-mentioned air-conditioning system, and further comprising a first electromagnetic control set upstream of the radiant heat exchanger 71 when the air-conditioning system is in a cooling mode The valve 11 and the third electromagnetic control valve 33 arranged downstream of the radiation heat exchanger; when the air conditioning system is in heating mode, the second electromagnetic control valve 22 arranged upstream of the first heat exchanger 81 and the second electromagnetic control valve 22 arranged in the first heat exchanger The fourth electromagnetic control valve 44 downstream of the heat exchanger 81 is equipped with electromagnetic control valves at the inlet and outlet ends of the radiation heat exchanger 71 and the first heat exchanger 81. The electromagnetic control valve can adjust the flow rate and act as an electronic expansion valve. Similarly, it can control on and off, and its function is similar to that of a two-way valve. The purpose is to better control the flow of refrigerant, which can be controlled according to the indoor ambient temperature to improve the energy-saving effect.

[0041] Preferably, it includes at least the following steps: detecting the indoor environment temperature T ring, the method of detecting the indoor environment temperature, can refer to the existing setting environment temperature sensor detection, or other methods; judging the indoor environment temperature T ring and the set temperature T The difference is set, that is, the indoor ambient temperature minus the set temperature, and the difference is judged to be compared with the set threshold to realize precise control and control the air conditioner to operate in a specific operation mode. The specific operation mode here is: The first refrigeration mode-conventional refrigeration, that is, the first heat exchanger 81 of the present invention cools alone; the second refrigeration mode-a combination of conventional refrigeration + radiant refrigeration, that is, the first heat exchanger 81 and the radiation heat exchanger 71 of the present invention are simultaneously Realize the refrigeration function; the third refrigeration mode-radiant refrigeration, that is, the radiant heat exchanger 71 of the present invention implements the refrigeration function alone; the first heating mode-conventional heating, and the first heat exchanger 81 of the present invention heats separately; The second heating mode-conventional heating + radiation heating combination, that is, the first heat exchanger 81 and the radiant heat exchanger 71 of the present invention realize the heating function at the same time; the third heating mode-radiant heating, namely the present invention The radiation heat exchanger 71 alone realizes the heating function.

[0042] Preferably, when T ring> When T is set to +A°C, the first electromagnetic control valve 11 and the third electromagnetic control valve 33 are closed, the second electromagnetic control valve 22 and the fourth electromagnetic control valve 44 are open, and the A°C is The first temperature threshold, the air conditioner operates in the first cooling mode, and the preferred value range of the first temperature threshold A°C is 5°C

[0043] Preferably, when T is set to +B℃

[0044] Preferably, when T ring≤Tset+B°C, the first electromagnetic control valve 11 and the third electromagnetic control valve 33 are opened, and the second electromagnetic control valve 22 and the fourth electromagnetic control valve 44 Turn off, the B°C is the second temperature threshold, the air conditioner operates in the third cooling mode, and the preferred value range of the second temperature threshold B°C is 3°C

[0045] Preferably, when T ring

[0046] Preferably, when Tset-A°C≤T ring

[0047] Preferably, when T ring ≥ T is -B°C, the first electromagnetic control valve 11 and the third electromagnetic control valve 33 are opened, and the second electromagnetic control valve 22 and the fourth electromagnetic control valve 44 Turn off, the B°C is the second temperature threshold, the air conditioner operates in the third heating mode, and the preferred value range of the second temperature threshold B°C is 3°C

[0048] Of course, the embodiment disclosed in this specification is the control when the solenoid control valve is fully opened or fully closed. There are many control modes. For example, the control mode of the solenoid control valve not fully open or closed also belongs to the design concept of the present invention. The purpose is to adjust the flow rate and carry out more precise control to achieve the effect of energy saving, which will not be described in detail here.

[0049] Of course, the above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the basic principles of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection scope of the present invention.