Unlock instant, AI-driven research and patent intelligence for your innovation.

air conditioner

A technology for air conditioners and external air temperature, which is applied to refrigerators, mechanical equipment, damage protection, etc., and can solve problems such as inability to defrost, inability to perform heating operation, etc.

Active Publication Date: 2020-02-28
SHARP KK
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even if frost forms on the outdoor heat exchanger, it cannot be defrosted, causing the outdoor heat exchanger to freeze, and heating operation cannot be performed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • air conditioner
  • air conditioner
  • air conditioner

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0019] figure 1 The air conditioner of 1st Embodiment is shown. In the heat pump type air conditioner, the outdoor unit 1 and the indoor unit 2 are connected by piping and wiring. The outdoor unit 1 includes a compressor 3 , a four-way valve 4 , an outdoor heat exchanger 5 , an expansion valve 6 , and an outdoor fan 7 . The indoor unit 2 includes an indoor heat exchanger 8 and an indoor fan 9 . The compressor 3, the four-way valve 4, the outdoor heat exchanger 5, the expansion valve 6, and the indoor heat exchanger 8 are connected by piping to form a refrigerant circuit. In order to connect the piping of the indoor unit 2 and the piping of the outdoor unit 1, a two-way valve 10 and a three-way valve 11 are provided on the outdoor unit. The piping connecting the expansion valve 6 and the indoor heat exchanger 8 is provided with a two-way valve 10 , and the piping connecting the four-way valve 4 and the indoor heat exchanger 8 is provided with a three-way valve 11 .

[0020]...

no. 2 Embodiment approach

[0039] Depending on the outside air temperature, the heat is turned on in a different cycle. The lower the outside air temperature, the less efficient the heating operation will be. Therefore, after the room temperature drops, it takes time for the room temperature to reach the set temperature. As a result, the operating time for thermal ON becomes longer. Conversely, when the outside air temperature is not so low, the operating time of the heat-on is shortened. Here, the air conditioner counts the number of heat-on operations based on a predetermined time corresponding to the outside air temperature, and determines whether or not to perform frosting operation. In addition, other structures are the same as those of the first embodiment.

[0040] The control device 12 determines the predetermined time according to the outside air temperature. When the outside air temperature is high, a shorter predetermined time is set, and when the outside air temperature is low, a longer p...

no. 3 Embodiment approach

[0045] In the above-mentioned embodiment, when the heat-off and heat-on are repeated in a short cycle, the defrosting operation is forcibly performed. However, even in this case, the outdoor heat exchanger 5 may not be frosted. At this time, the defrosting operation is unnecessary. Here, the air conditioner performs frost detection before performing the forced defrosting operation. That is, the heating operation is performed so that the frost detection is effective during the heat-on that has reached a predetermined number of times. In addition, other structures are the same as those of the first or second embodiment.

[0046] When the controller 12 performs a heating operation in which the heat is turned on a predetermined number of times (six times), the heat is turned on so that the operation time exceeds a predetermined time. Such as Figure 5 As shown, when the count of the number of operations of heat-on reaches 5 times (S30), the control device 12 confirms whether t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

When thermo-OFF is performed during heating operation, the operation time period of immediate preceding thermo-ON operation is confirmed. When the operation time period is not more than a specified time period, the number of operations of thermo-ON is counted. Every time thermo-ON and thermo-OFF are repeated, the number of operations of thermo-ON is counted. When the count of the number of operations reaches a predetermined number of times, defrosting operation is forcibly performed. When thermo-OFF and the thermo-ON are repeated in a short cycle, defrosting of an outdoor heat exchanger can be performed. As described above, by forcibly performing defrosting operation upon coming into a situation in which thermo-OFF and thermo-ON are repeated in a short cycle, it is made possible to eliminate an adverse effect that defrosting of the outdoor heat exchanger cannot be performed in such a situation.

Description

technical field [0001] The present invention relates to an air conditioner that performs a defrosting operation when frost formation on an outdoor heat exchanger is detected during heating operation. Background technique [0002] In an air conditioner having an indoor unit and an outdoor unit, if frost forms on the outdoor heat exchanger during heating operation, it will adversely affect heat exchange. Here, by detecting the temperature of the outdoor heat exchanger, frosting detection of the outdoor heat exchanger is performed. When frosting is detected, defrosting operation is performed. [0003] However, after the heating operation is started and the compressor is activated, the refrigerant circulates to form a refrigeration cycle. At the beginning of compressor driving, the outdoor heat exchanger is rapidly cooled due to the high suction pressure of the compressor. Therefore, when it is determined whether to perform the defrosting operation based on the temperature of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/42F24F11/64F24F11/61
CPCF24F11/30F24F11/41F24F11/89F25B47/02
Inventor 有贺徹
Owner SHARP KK