US 12,305,907 B2
Carbon dioxide heat pump evaporator
Xiaoliang Tang, Jiangsu (CN); Dan Xiong, Jiangsu (CN); Hao Pan, Jiangsu (CN); Qiang Kang, Jiangsu (CN); Xiaofei Song, Jiangsu (CN); Hao Qiu, Jiangsu (CN); and Bin Chen, Jiangsu (CN)
Assigned to JIANGSU SUJING GROUP CO., LTD., Jiangsu (CN)
Appl. No. 18/042,992
Filed by JIANGSU SUJING GROUP CO., LTD., Jiangsu (CN)
PCT Filed Aug. 30, 2021, PCT No. PCT/CN2021/115262
§ 371(c)(1), (2) Date Feb. 24, 2023,
PCT Pub. No. WO2022/083288, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 202011129579.3 (CN), filed on Oct. 21, 2020.
Prior Publication US 2023/0358460 A1, Nov. 9, 2023
Int. Cl. F25D 21/14 (2006.01); F25B 39/02 (2006.01); F25B 47/00 (2006.01); F25D 21/00 (2006.01); F25D 21/02 (2006.01); F25D 21/08 (2006.01)
CPC F25D 21/14 (2013.01) [F25B 39/02 (2013.01); F25B 47/00 (2013.01); F25D 21/006 (2013.01); F25D 21/02 (2013.01); F25D 21/08 (2013.01); F25B 2400/01 (2013.01); F25B 2700/11 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A carbon dioxide heat pump evaporator, comprising:
side evaporators having defrosting water flow channels formed thereon;
a defrosting drainage system;
a controller; and
a temperature sensor for detecting the ambient temperature;
wherein the defrosting drainage system comprises a plurality of defrosting electric heating tubes inserted into the side evaporators;
a water receiving gutter which is connected to the defrosting water flow channels,
a gutter electric heater for heating the water receiving gutter; and
a drainage pipe which is connected to the water receiving gutter,
wherein the drainage pipe is provided with a pipeline electric heating tracing band,
wherein the controller is respectively connected in communication with the plurality of defrosting electric heating tubes, the gutter electric heater, the pipeline electric heating tracing band, and the temperature sensor;
wherein the defrosting drainage system is configured such that:
when the temperature sensor detects that the ambient temperature is greater than or equal to T1, the plurality of defrosting electric heating tubes, the gutter electric heater and the pipeline electric heating tracing band do not work; and
when the temperature sensor detects that the ambient temperature is less than T1, defrosting starts, the plurality of defrosting electric heating tubes, the gutter electric heater and the pipeline electric heating tracing band start heating, after defrosting is completed, the plurality of defrosting electric heating tubes are powered off, and the gutter electric heater and the pipeline electric heating tracing band stop working after a delay time t, wherein the delay time t varies according to different ambient temperatures such that:
when T2≤ambient temperature<T1, the gutter electric heater and the pipeline electric heating tracing band are powered off after a delay time t1;
when T3≤ambient temperature<T2, the gutter electric heater and the pipeline electric heating tracing band are powered off after a delay time t2; and
when ambient temperature<T3, the gutter electric heater and the pipeline electric heating tracing band are powered off after a delay time t3.