CN85102650A - Air conditioner - Google Patents

Abstract

In an air conditioner having a refrigerant circuit composed of an evaporator, a condenser and a capillary tube connected in sequence, and a bypass connected in parallel with the capillary tube and the evaporator and composed of a capillary tube and a two-way valve, a blower and a compressor continue to operate synchronously with a thermostat, thereby performing dehumidifying operation and controlling the room temperature to decrease.

Description

Air conditioner

The present invention relates to air conditioner.Particularly about having the air conditioner of dehumidifying function, dehumidify in the reduction limit of limit control indoor temperature when high humility.

The kind of refrigeration cycle that in the past has the window formula air conditioner of dehumidifying function as shown in Figure 1, is connected compressor 1, condenser 2, check valve 3, cross valve 4, evaporimeter 5, reheater 6 in turn by pipe laying and capillary 7,8 and forms.During refrigerating operaton, flowing to of cold-producing medium is shown in dotted line, and the heat exchanger 5,6 of indoor uses as evaporimeter entirely; During the dehumidifying operation, under the effect of cross valve, the flow direction of cold-producing medium is shown in solid line.Indoor heat converter is divided into two parts, uses as evaporimeter 5 and reheater 6.Be the indoor heat exchanger one of when dehumidifying as reheater, therefore another for fear of the two heat exchange, be provided with a little space as evaporimeter.Its dehumidifying operation is by the evaporator cools indoor air dehumidification, directly puts into indoorly in order to prevent its cold air, and room temperature descended, and adopts reheater 6 to raise and emits method of temperature.And, during the dehumidifying operation, in reheater 6, need flow through the cold-producing medium of high temperature condition, pipeline is mounted to and can delivers to reheater 6 to cold-producing medium from the centre of condenser 2.But, form such kind of refrigeration cycle, cross valve that the refrigerant flow direction that must change is used and above-mentioned special heat exchanger 2,5,6.Therefore, in this dehumidification mode in the past, the cost of cross valve and cost that needed parts increase is installed and cost that heat exchanger increases etc. all makes on the cost long.And the space problem of cross valve is installed in equipment and the pressure loss that causes because of cross valve makes refrigerating capacity reduction etc., become design and go up very large difficulty.

In order to eliminate this class problem, the purpose of this invention is to provide the decline that prevents refrigerating capacity, and have the air conditioner of dehumidification function.

In order to reach this purpose, the present invention is that the obstructed pervaporation device of part of refrigerant that utilizes two-port valve that condenser is sent is sent compressor back to, thereby reduces the ability of evaporimeter when the dehumidifying operation, prevents that room temperature from descending.In addition, thermostat cuts out, and when compressor stops, evaporating again and returns in the air in order to prevent the globule that condenses on the indoor heat-exchanger surface, also wants the work of out-of-blast machine.And, be wound with heater strip in the sensible heat of thermostat on capillary, when thermostat cuts out,,, prevent that by natural ventilation humidity from rising from shortening the reset time of thermostat to the heater strip energising.

Below, by Fig. 2 to Fig. 5 one embodiment of the present of invention are described.Fig. 2 is a refrigeration cyclic graph of the present invention, and Fig. 3 represents control circuit of the present invention, and Fig. 4 represents its working waveform figure.

In Fig. 2, the 9th, compressor, the 10th, condenser, the 11st, two-port valve, the 12nd, cooling capillary, the 13rd, evaporimeter, the 14th, capillary is used in dehumidifying, and forms bypass by two-port valve 11 and capillary.With the control circuit among Fig. 3 this kind of refrigeration cycle is described.

Among Fig. 3, the power switch 16 of connection power supply 15 moves cold air and the travelling contact of the change-over switch 20 that dehumidifying moves is transformed into No. 3 and No. 6, becoming dehumidifying and moving, and give the two-port valve coil 22 energisings, cold-producing medium flows through the bypass that is made of capillary shown in Figure 2 14 and two-port valve 11.Like this, the refrigerant amount of inflow evaporator 13 reduces, and can control the rapid decline of room temperature.This not too needs refrigerating capacity in the occasion of low temperature and high relative humidity, is effectively.As shown in Figure 3, when change-over switch 20 is forwarded to above-mentioned dehumidifying and moves a side, pressure fan 19 and compressor 17 together can with the interrupted synchronous operation of thermostat 18.Therefore, when pressure fan 19 stops, owing to flow down from heat-exchanger surface attached to the globule on the indoor heat converter, so can prevent effectively that it from returning in the internal ambience again.In addition, shown in the circuit diagram of Fig. 3, with the heater strip on the capillary, its resistance value is adjustable around the sensible heat of thermostat 18, regulate this value and make heater strip 21 no power when thermostat 18 is connected, and energising when thermostat 18 cuts out.Thus, pressure fan is quit work, postponed the reset time of thermostat 18,, can accelerate its reset time owing to there is the sensible heat of 21 pairs of thermostats 18 of heater strip partly to heat though thermostat 18 cuts out.Because it is fast that the temperature-rise ratio humidity that radiant heat etc. causes rises, air conditioner is under the control of thermostat, and is out of service, and dependence natural ventilation etc. can reduce the rise of humidity.Fig. 4 represents the above-mentioned method of operation.According to this operation, the change curve of room temperature and humidity is shown in the solid line among Fig. 5.

Room temperature when representing refrigerating operaton and humidity ratio with dotted line, ambient-temp-stable than the high several years in when refrigeration (℃) locate, humidity low zone than refrigeration the time becomes the sawtooth waveforms shape to change, the amplitude of its amplitude up and down during also than refrigeration is little.And room temperature, humidity change with the contact of thermostat 18 settings and the capacity of heater strip 21.That is, according to the present invention, owing to only use 1 two-port valve greatly more cheap than cross valve in equipment, room temperature can sharply not descend when dehumidifying, and can obtain comfortable environment.

According to the present invention, when low temperature and high humidity, if be converted to dehumidifying operation, because the effect of two-port valve, the part of the cold-producing medium that comes out from condenser, obstructed pervaporation device directly returns compressor, and the cold-producing medium of the evaporimeter of flowing through is reduced.And therefore the synchronously interrupter duty of pressure fan and compressor and thermostat, can promptly control the reduction of room temperature, and operation dehumidifies again.

In addition, partly be wound with heater strip in the sensible heat of thermostat, the heater strip energising is partly heated to the sensible heat of thermostat like this when thermostat cuts out, and to accelerate involution, relies on natural ventilation etc. to prevent the rise of humidity.

Thereby, because do not use former cross valve and special heat exchanger, so make the goods design become easy aspect structure and the space.In addition, at finished product in price,, can reduce price significantly owing to removed the expense of cross valve and the expense of the required parts of installation etc.Its result can provide the cheap air conditioner with dehumidifying function to market.

Fig. 1 is the refrigeration cycle diagram that had the air conditioner of dehumidifying function in the past.Fig. 2 is a refrigeration cycle diagram of the present invention.Fig. 3 is a circuit diagram of the present invention.Fig. 4 is a working waveform figure of the present invention.Solid line is the present invention's when operation room temperature and the change curve of humidity that dehumidifies among Fig. 5, the change curve of room temperature and humidity when dotted line is refrigerating operaton.

1 ... compressor, 2 ... condenser, 3 ... check valve, 4 ... cross valve, 5 ... evaporimeter, 6 ... reheater, 7 ... cooling capillary, 8 ... the dehumidifying capillary, 9 ... compressor, 10 ... condenser, 11 ... two-port valve, 12 ... cooling capillary, 13 ... evaporimeter, 14 ... the dehumidifying capillary, 15 ... power supply, 16 ... power switch, 17 ... compressor, 18 ... thermostat, 19 ... the blower-use motor, 20 ... refrigeration, the dehumidifying change-over switch, 21 ... heater strip, 22 ... the two-port valve coil.

Claims (3)

1, air conditioner, it is characterized by: in the air conditioner that is provided with in turn the compressor that connects, condenser, capillary, refrigerant loop that evaporimeter constitutes and the bypass that by capillary and two-port valve constitute in parallel and pressure fan, have the control device of intermittent controlled above-mentioned compressor and pressure fan with above-mentioned capillary and evaporimeter.

2, according to claim 1 described air conditioner, it is characterized by: above-mentioned control device is formed by the thermistor of interrupted above-mentioned compressor operation with the switch of the interrupted synchronously interrupted above-mentioned pressure fan work of this thermistor, and above-mentioned thermistor and switch connect into series connection.

3, according to claim 2 described air conditioners, it is characterized in that, be wound with heater strip in the sensible heat of above-mentioned thermostat on capillary, be in when disconnecting at thermostat, electric current flows through above-mentioned heater strip.

Images