Air conditioner
A technology of air-conditioning device and control device, which is applied in air-conditioning system, space heating and ventilation, heating mode, etc., can solve problems such as inability to correspond to load, and achieve the effect of energy saving and reduction of transmission power
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Embodiment approach 1
[0024] figure 1 It is a figure which shows the installation example of the air conditioner which concerns on embodiment of this invention. figure 1 The air conditioner has an outdoor unit 1 as a separate unit, one or more indoor units 2, and a relay unit 3, the outdoor unit 1 is used as a heat source device, and the indoor unit 2 performs air conditioning in the air-conditioning target space, The relay unit 3 serves as a relay device, and performs heat exchange between the refrigerant and a medium (hereinafter referred to as a heat medium) that transports heat (calorie) different from the refrigerant, and relays heat transfer. The outdoor unit 1 and the relay unit 3 are connected by a refrigerant pipe 4 for circulating a refrigerant such as a quasi-azeotropic refrigerant such as R-410A or R-404A to transfer heat. In addition, between the relay unit 3 and the indoor unit 2, in order to circulate heat mediums such as water, water added with non-volatile or low-volatile preserva...
Embodiment approach 2
[0100] Figure 9 It is a figure which shows the structure of the air-conditioning apparatus of Embodiment 2. exist Figure 9 Among them, the flow meters 41 a , 41 b , 41 c , and 41 d detect the flow rates of the heat medium flowing into the use-side heat exchangers 26 a to 26 d , respectively, and send a signal of the flow rate value to the relay unit side control device 300 .
[0101] In this embodiment, for example, by providing the flow meters 41a to 41d, the relay unit side control device 300 obtains the value of the flow rate of the heat medium flowing through the use side heat exchangers 26a to 26d. Furthermore, based on the flow rate of the heat medium flowing through the use-side heat exchangers 26a-26d, the temperatures detected by the third temperature sensors 33a-33d, and the temperatures detected by the fourth temperature sensors 34a-34d, the relay unit-side control device 300 calculates Wait.
[0102] For example, it is judged whether the total value of the hea...
Embodiment approach 3
[0124] Figure 11 It is a p-h diagram of the refrigerating cycle of the heating main operation in Embodiment 3 when the outside air temperature is low. Here, the configuration of the air conditioner of this embodiment is the same as that described in Embodiments 1 and 2. image 3 , 8 same. In this embodiment, the operation of the opening degree of the expansion valve 16c under the control of the relay unit side control device 300 will be described.
[0125] For example, when the air temperature (hereinafter referred to as outside air temperature) Ta of the outdoor space 6 is low, the indoor unit 2 performs more heating. However, there are also indoor spaces 7 that require cooling throughout the year, such as a server room where many computers are placed. In this case, the heating main operation described above is performed. At this time, since the heat source side heat exchanger 12 functions as an evaporator, it absorbs heat from the atmosphere. In order to absorb heat f...
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