Apparatus with dehumidification and defrosting abilities and controlling method thereof

Abstract

An apparatus with dehumidification and defrosting abilities comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve and a means for refrigerant flow controlling. The compressor is coupled to the four-way valve. The four-way valve is coupled to the outdoor heat exchanger. The indoor heat exchanger is coupled to the four-way valve. The means for refrigerant flow controlling is respectively coupled to the indoor heat exchanger, the outdoor heat exchanger and the four way valve, to control mixing a low-temperature refrigerant and a high-temperature before flowing into the indoor heat exchanger, or to control mixing a low-temperature refrigerant and a high-temperature refrigerant before flowing into the compressor, or control mixing a low-temperature refrigerant and a high-temperature refrigerant before flowing into the outdoor heat exchanger.

What is claimed is: 
     
         1 . An apparatus with dehumidification and defrosting abilities, comprising:
 a compressor;   an indoor heat exchanger;   an outdoor heat exchanger;   a four-way valve; and   a means for refrigerant flow controlling;   wherein, the compressor is coupled to the four-way valve; the four-way valve is coupled to the outdoor heat exchanger; the indoor heat exchanger is coupled to the four-way valve; and the means for refrigerant flow controlling is respectively coupled to the indoor heat exchanger, the outdoor heat exchanger and the four way valve, while being enabled to a process selecting from the group consisting of: controlling the mixing of a low-temperature refrigerant and a high-temperature before flowing into the indoor heat exchanger, controlling the mixing of a low-temperature refrigerant and a high-temperature refrigerant before flowing into the compressor, and controlling the mixing of a low-temperature refrigerant and a high-temperature refrigerant before flowing into the outdoor heat exchanger.   
     
     
         2 . The apparatus of  claim 1 , further comprising: a first pipe, a second pipe, a third pipe, a fourth pipe, a fifth pipe, a sixth pipe, a seventh pipe, and an eighth pipe, being arranged in a manner that the compressor is coupled to the four-way valve via the fourth pipe; the four-way valve is coupled to the outdoor heat exchanger via the fifth pipe; the outdoor heat exchanger is coupled to the means for refrigerant flow controlling via the sixth pipe; the means for refrigerant flow controlling is coupled to the indoor heat exchanger via the first pipe; the indoor heat exchanger is coupled to the four-way valve via the second pipe; the four-way valve is coupled to the compressor via the third pipe; the means for refrigerant flow controlling is coupled to the second pipe via the seventh pipe; the means for refrigerant flow controlling is coupled to the fifth pipe via the eighth pipe, while allowing the eighth pipe to be disposed winding around the periphery of the compressor. 
     
     
         3 . The apparatus of  claim 2 , wherein the means for refrigerant flow controlling further comprises: a first expansion valve, a second expansion valve and a third expansion valve, being arranged in a manner that the first expansion valve and the second expansion valve are arranged coupling to the sixth pipe in respective, while allowing the first expansion valve to couple to the seventh pipe; and the second expansion valve and the third expansion valve are arranged coupling to the first pipe in respective, while allowing the third expansion valve to couple to the eighth pipe. 
     
     
         4 . The apparatus of  claim 3 , wherein each of the first expansion valve, the second expansion valve and the third expansion valve is substantially an electronic expansion valve. 
     
     
         5 . The apparatus of  claim 3 , wherein the eighth pipe is configured with a first position, a second position and a valve in a manner that the valve is disposed coupling respectively to the first position and the second position. 
     
     
         6 . The apparatus of  claim 5 , wherein the first position is disposed between the third expansion valve and the compressor; the second position is disposed between the compressor and the fifth pipe; and the valve is a one-way valve. 
     
     
         7 . The apparatus of  claim 1 , wherein the outdoor heat exchanger further comprises an outdoor temperature sensor; and the indoor heat exchanger further comprises an indoor temperature sensor. 
     
     
         8 . A dehumidification control method, comprising the step of:
 enabling a low-temperature refrigerant to mix with a high-temperature refrigerant so as to form a middle temperature refrigerant when an indoor temperature is larger than a first temperature, while enabling the middle temperature refrigerant to flow into an indoor heat exchanger.   
     
     
         9 . The dehumidification control method of  claim 8 , further comprising the step of:
 enabling a low-temperature refrigerant to mix with a high-temperature refrigerant so as to form a middle temperature refrigerant when an outdoor temperature is larger than a second temperature, while enabling the middle temperature refrigerant to flow into a compressor where it is forced to flow into an outdoor heat exchanger.   
     
     
         10 . The dehumidification control method of  claim 9 , wherein the first temperature is detected and obtained by a first sensor arranged in a means for refrigerant flow controlling; the second temperature is detected and obtained by a second sensor arranged in the means for refrigerant flow controlling; the indoor temperature is detected and obtained by an indoor temperature sensor; and the outdoor temperature is detected and obtained by an outdoor temperature sensor. 
     
     
         11 . The dehumidification control method of  claim 10 , wherein the means for refrigerant flow controlling is configured with a second expansion valve, the second expansion valve is coupled to an indoor heat exchanger, the first sensor is disposed at a position between the indoor heat exchanger and the second expansion valve, the second expansion valve is further coupled to an outdoor heat exchanger, and the second sensor is disposed at a position between the second expansion valve and the outdoor heat exchanger. 
     
     
         12 . A defrosting control method, comprising the step of:
 enabling a low-temperature refrigerant to mix with a high-temperature refrigerant so as to form a middle temperature refrigerant when an outdoor temperature is smaller than a second temperature, while enabling the middle temperature refrigerant to flow into an outdoor heat exchanger.   
     
     
         13 . The defrosting control method of  claim 12 , further comprising the step of:
 enabling a low-temperature refrigerant to mix with a high-temperature refrigerant so as to form a middle temperature refrigerant when an indoor temperature is smaller than a first temperature, while enabling the middle temperature refrigerant to flow into an indoor heat exchanger.   
     
     
         14 . The defrosting control method of  claim 13 , wherein the first temperature is detected and obtained by a first sensor arranged in a means for refrigerant flow controlling; the second temperature is detected and obtained by a second sensor arranged in the means for refrigerant flow controlling; the indoor temperature is detected and obtained by an indoor temperature sensor; and the outdoor temperature is detected and obtained by an outdoor temperature sensor. 
     
     
         15 . The defrosting control method of  claim 14 , wherein the means for refrigerant flow controlling is configured with a second expansion valve, the second expansion valve is coupled to an indoor heat exchanger, the first sensor is disposed at a position between the indoor heat exchanger and the second expansion valve, the second expansion valve is further coupled to an outdoor heat exchanger, and the second sensor is disposed at a position between the second expansion valve and the outdoor heat exchanger.