CN-115628471-B - Defrosting and antifreezing system of heat pump heating unit and heat pump heating unit

CN115628471BCN 115628471 BCN115628471 BCN 115628471BCN-115628471-B

Abstract

The invention provides a defrosting and anti-freezing system of a heat pump heating unit and the heat pump heating unit. The defrosting and antifreezing system comprises a main control board, a water receiving disc, an ambient temperature sensor and an in-disc temperature sensor, wherein the in-disc temperature sensor is arranged on the inner side of the water receiving disc, the main control board is respectively and electrically connected with the ambient temperature sensor and the in-disc temperature sensor, the water receiving disc is provided with a drain hole, an electric heating belt electrically connected with the main control board is laid on the outer side of the water receiving disc, an insulating layer is laid on the outer side of the electric heating belt, the main control board is used for starting the electric heating belt when a heat pump heating unit enters a defrosting mode, the ambient temperature is lower than a first set temperature and higher than a second set temperature, and controlling the electric heating belt to be closed when the temperature of the water receiving disc is higher than a third set temperature and lasts for the first set time, so that the electric heating time can be reduced while the water receiving disc is prevented from icing and smoothly draining, and energy and electricity are saved.

Inventors

WU JINGLONG
LU YIJUN
CHEN XIAOQI
TONG FENGXI

Assignees

中山市爱美泰电器有限公司
热立方科技(佛山市)有限公司

Dates

Publication Date: 20260508
Application Date: 20221031

Claims (9)

1. The defrosting and antifreezing system of the heat pump heating unit is characterized in that: The device comprises a main control board, a water pan, an ambient temperature sensor and an in-pan temperature sensor, wherein the in-pan temperature sensor is arranged on the inner side of the water pan, and the main control board is respectively and electrically connected with the ambient temperature sensor and the in-pan temperature sensor; The water receiving disc is provided with a drain hole, an electric heating belt electrically connected with the main control board is laid on the outer side of the water receiving disc, and an insulating layer is laid on the outer side of the electric heating belt; The main control board further comprises a first wiring terminal and a second wiring terminal, the first wiring terminal is connected to the grounding end of the heat pump heating unit, the second wiring terminal is led out of a conductive end to the middle of the drain hole and is not in contact with the wall of the drain hole, and when the first wiring terminal is conducted with the second wiring terminal, the main control board judges that the water receiving disc is frozen; the main control board is used for starting the electric heating belt when the heat pump heating unit enters a defrosting mode and the ambient temperature is lower than a first set temperature and higher than a second set temperature, and controlling the electric heating belt to be closed when the water pan temperature is higher than a third set temperature and the first set time is continuous.
2. The defrosting and anti-freezing system of the heat pump heating unit according to claim 1, wherein: The main control board is further used for starting the electric heating belt when the heat pump heating unit enters a defrosting mode and the ambient temperature is lower than a second set temperature and higher than a fourth set temperature, and controlling the electric heating belt to be closed when the water pan temperature is higher than a fifth set temperature and lasts for a second set time, wherein the fifth set temperature is lower than the third set temperature, and the second set time is not smaller than the first set time.
3. The defrosting and anti-freezing system of the heat pump heating unit according to claim 2, wherein: The main control board is further used for starting the electric heating belt when the heat pump heating unit enters a defrosting mode and the ambient temperature is lower than a fourth set temperature and higher than a sixth set temperature, and controlling the electric heating belt to be closed when the water pan temperature is higher than a seventh set temperature and lasts for a third set time, wherein the seventh set temperature is lower than the fifth set temperature, and the third set time is longer than the second set time.
4. A defrosting and anti-freezing system of a heat pump heating unit according to claim 3, characterized in that: The main control board is further used for starting the electric heating belt when the heat pump heating unit enters a defrosting mode and the ambient temperature is lower than a sixth set temperature, and controlling the electric heating belt to be closed when the water pan temperature is higher than an eighth set temperature and lasts for a fourth set time, wherein the eighth set temperature is lower than the seventh set temperature, and the fourth set time is longer than the third set time.
5. The defrosting and anti-freezing system of the heat pump heating unit as claimed in claim 4, wherein: The first set temperature is 0 ℃, the second set temperature is-5 ℃, the third set temperature is 3 ℃, and the first set time is 1 minute; The fourth set temperature is-10 ℃, the fifth set temperature is 2 ℃, and the second set time is 1 minute; the sixth set temperature is-15 ℃, the seventh set temperature is 1 ℃, and the third set time is 2 minutes; The eighth set temperature is 0 ℃ and the fourth set time is 3 minutes.
6. The defrosting and anti-freezing system of the heat pump heating unit according to claim 1, wherein: the main control board is also used for controlling the electric heating belt to be started when the ambient temperature is lower than a first set temperature and the first wiring terminal and the second wiring terminal are conducted, and controlling the heat pump heating unit to stop when the electric heating belt starting time is longer than a fifth set time and the first wiring terminal and the second wiring terminal are still in a conducting state.
7. The defrosting and anti-freezing system of the heat pump heating unit according to claim 1, wherein: the water receiving disc is internally provided with a water guide groove, the water guide groove is arranged along the length direction of the water receiving disc, and the water discharge holes are respectively arranged at two ends of the water guide groove.
8. The defrosting and anti-freezing system of the heat pump heating unit as claimed in claim 7, wherein: The water guide grooves are two in parallel arrangement, the water guide grooves are V-shaped grooves, the connecting parts of the two V-shaped grooves extend upwards to form peak ridges, the peak ridges are higher than the outer side edges of the two V-shaped grooves, and the electric heating belt and the heat preservation layer are laid on the outer side surfaces of the V-shaped grooves.
9. The utility model provides a heat pump heating unit which characterized in that: a defrosting and anti-freezing system comprising the heat pump heating unit of any one of claims 1-8.

Description

Defrosting and antifreezing system of heat pump heating unit and heat pump heating unit Technical Field The invention relates to the technical field of heat pump heating, in particular to a defrosting and anti-freezing system of a heat pump heating unit and the heat pump heating unit. Background With the vigorous implementation of government clean heating policies and the increasing demand of people for heat supply, a safe, convenient, comfortable, efficient, economical and environment-friendly heat pump heating mode will increasingly occupy the heating market share. The defrosting action of the heating unit can generate condensed water at low ambient temperature, and the condensed water is a critical problem for timely discharging the condensed water out of the unit. If the condensed water can not be discharged in time, the condensed water can be frozen in the unit water receiving disc, and a drain pipe orifice on the water receiving disc is blocked, so that the condensed water is accumulated in the water receiving disc, the condensed water is frozen at low temperature, and the situation that the unit fin heat exchanger is extruded and broken or frost crack is caused seriously occurs. Therefore, the problem of timely draining condensed water at low temperature is always very important. Disclosure of Invention Based on the above, the invention aims to provide a defrosting and anti-freezing system of a heat pump heating unit and the heat pump heating unit, so that the electric heating time is reduced and energy and electricity are saved while the water receiving tray is ensured to avoid icing and smoothly drain water. In a first aspect, the invention provides a defrosting and anti-freezing system of a heat pump heating unit, The defrosting control device comprises a main control board, a water receiving disc, an ambient temperature sensor and an in-disc temperature sensor, wherein the in-disc temperature sensor is arranged on the inner side of the water receiving disc, the main control board is respectively and electrically connected with the ambient temperature sensor and the in-disc temperature sensor, the water receiving disc is provided with a drain hole, an electric heating belt electrically connected with the main control board is laid on the outer side of the water receiving disc, an insulating layer is further laid on the outer side of the electric heating belt, and the main control board is used for starting the electric heating belt when the heat pump heating unit enters a defrosting mode, the ambient temperature is lower than a first set temperature and higher than a second set temperature, and controlling the electric heating belt to be closed when the temperature of the water receiving disc is higher than a third set temperature and lasts for a first set time. Further, the main control board is further configured to turn on the electric heating belt when the heat pump heating unit enters a defrosting mode and the ambient temperature is lower than a second set temperature and higher than a fourth set temperature, and to control the electric heating belt to be turned off when the water pan temperature is higher than a fifth set temperature and continues for a second set time, wherein the fifth set temperature is lower than the third set temperature, and the second set time is not smaller than the first set time. Further, the main control board is further configured to turn on the electric heating belt when the heat pump heating unit enters a defrosting mode and the ambient temperature is lower than a fourth set temperature and higher than a sixth set temperature, and to control the electric heating belt to be turned off when the water pan temperature is higher than a seventh set temperature and lasts for a third set time, wherein the seventh set temperature is lower than the fifth set temperature, and the third set time is longer than the second set time. Further, the main control board is further configured to, when the heat pump heating unit enters a defrosting mode and the ambient temperature is lower than a sixth set temperature, start the electric heating belt, and control the electric heating belt to be closed when the water pan temperature is higher than an eighth set temperature and lasts for a fourth set time, wherein the eighth set temperature is lower than the seventh set temperature, and the fourth set time is longer than the third set time. Further, the first set temperature is 0 ℃, the second set temperature is-5 ℃, the third set temperature is 3 ℃, and the first set time is 1 minute; The fourth set temperature is-10 ℃, the fifth set temperature is 2 ℃, and the second set time is 1 minute; the sixth set temperature is-15 ℃, the seventh set temperature is 1 ℃, and the third set time is 2 minutes; The eighth set temperature is 0 ℃ and the fourth set time is 3 minutes. Further, the main control board further comprises a first wiring terminal and a second wiring terminal, the first wirin