Heat pump unit for preventing secondary freezing of defrosting water, heat pump unit and method for preventing secondary freezing of defrosting water of heat pump unit

Abstract

The invention provides a heat pump for preventing secondary freezing of defrosting water, a heat pump unit and a method for preventing the secondary freezing of the defrosting water of the heat pump unit. According to the heat pump unit, a water pan is arranged below fins, the end parts of the fins extend into the closed cavity in the water pan, the defrosting water enters the water pan, then converges to the low-lying position along a slope and is discharged, a hydrophobic material is sprayed on the inner surface of the water pan, a high-density conical structure is arranged at the bottom to prevent formation of a water film, the water pan is further provided with an electric heating belt and a heat preservation layer to keep the temperature of the cavity in the water pan higher than zero DEG C. According to the technical solution, the problem of the secondary freezing of the defrosting water is thoroughly solved, and a good technical effect is achieved.

Description

technical field

[0001] The invention relates to the field of heating, ventilating and air conditioning, in particular to a heat pump unit and a method for preventing secondary freezing of its defrosting water. Background technique

[0002] Air source heat pump units are widely used in high-end buildings such as office buildings, commercial buildings, hotels, etc., because they can take into account cooling and heating at the same time, and adjust the working quantity and working status of the unit according to the heating or cooling demand of the building, so it is favored by people . However, in the winter heating season in the north, the temperature is usually -5°C to -25°C or even lower, and the finned heat exchanger of the heat pump unit is prone to frost, so it is necessary to start the defrosting program to defrost. The defrosting water usually flows into the drip pan. The structure of the water receiving tray in the prior art is usually open without any auxiliary he...

Examples

Embodiment 1

[0052]This embodiment discloses a heat pump unit that prevents secondary freezing of defrosting water. Combined with Figure 1 to Figure 2. The unit has a height in a first direction perpendicular to the ground, a width in a second direction perpendicular to the first direction, and a thickness in a third direction perpendicular to both the first direction and the second direction, so The unit includes a compressor 1, an evaporator 2, a condenser 3, and a throttling component; wherein, the evaporator 2 includes a finned heat exchanger 2-1 and a fan 2-2.

[0053] The unit also has a water receiving pan 4, which is located at the lower part of the fins of the finned heat exchanger 2-1 and extends along the third direction.

[0054] The fins of the finned heat exchanger 2 - 1 extend along a first direction, and the ends of the fins protrude into the water receiving pan 4 .

[0055] The water receiving tray 4 has a guard plate 4-1 and a surrounding groove 4-2, and the guard plate...

Embodiment 2

[0064] This embodiment discloses a heat pump unit, the unit has a finned heat exchanger, and the finned heat exchanger extends along a direction perpendicular to the ground;

[0065] The unit also has a water receiving tray, which is located at the lower part of the fins of the finned heat exchanger and extends along the arrangement direction of the fins;

[0066] The ends of the fins of the finned heat exchanger protrude into the water receiving tray;

[0067] The water receiving tray has a guard plate and a surrounding groove, and the guard plate and the surrounding groove surround the ends of the fins and form a closed cavity;

[0068] The frost formed on the fins forms water after defrosting and flows down the fins into the cavity formed by the water receiving tray;

[0069] The bottom of the water receiving tray has a slope and its drain pipe, the inlet of the drain pipe is located at or close to the lowest point of the slope, the defrosting water on the fins enters the ...

Embodiment 3

[0075] This embodiment discloses a method for preventing secondary freezing of the defrosting water of the heat pump unit, and the method includes the following steps:

[0076] S1: Make the fins of the finned heat exchanger of the heat pump unit extend in a direction perpendicular to the ground;

[0077] S2: providing a water receiving tray, so that the water receiving tray is located at the lower part of the fins and extends along the arrangement direction of the fins;

[0078] S3: making the ends of the fins of the finned heat exchanger extend into the water receiving tray;

[0079] S4: The water receiving tray has a guard plate and a surrounding groove, and the guard plate and the surrounding groove surround the ends of the fins and form a closed cavity; so that the frost formed on the fins is formed after defrosting Water flows down into the cavity formed by the water receiving tray along the fins;

[0080] S5: Let the bottom of the water receiving tray have an inclined ...

technical field

[0001] The invention relates to the field of heating, ventilating and air conditioning, in particular to a heat pump unit and a method for preventing secondary freezing of its defrosting water. Background technique

[0002] Air source heat pump units are widely used in high-end buildings such as office buildings, commercial buildings, hotels, etc., because they can take into account cooling and heating at the same time, and adjust the working quantity and working status of the unit according to the heating or cooling demand of the building, so it is favored by people . However, in the winter heating season in the north, the temperature is usually -5°C to -25°C or even lower, and the finned heat exchanger of the heat pump unit is prone to frost, so it is necessary to start the defrosting program to defrost. The defrosting water usually flows into the drip pan. The structure of the water receiving tray in the prior art is usually open without any auxiliary he...

Examples

Embodiment 1

[0052]This embodiment discloses a heat pump unit that prevents secondary freezing of defrosting water. Combined with Figure 1 to Figure 2. The unit has a height in a first direction perpendicular to the ground, a width in a second direction perpendicular to the first direction, and a thickness in a third direction perpendicular to both the first direction and the second direction, so The unit includes a compressor 1, an evaporator 2, a condenser 3, and a throttling component; wherein, the evaporator 2 includes a finned heat exchanger 2-1 and a fan 2-2.

[0053] The unit also has a water receiving pan 4, which is located at the lower part of the fins of the finned heat exchanger 2-1 and extends along the third direction.

[0054] The fins of the finned heat exchanger 2 - 1 extend along a first direction, and the ends of the fins protrude into the water receiving pan 4 .

[0055] The water receiving tray 4 has a guard plate 4-1 and a surrounding groove 4-2, and the guard plate...

Embodiment 2

[0064] This embodiment discloses a heat pump unit, the unit has a finned heat exchanger, and the finned heat exchanger extends along a direction perpendicular to the ground;

[0065] The unit also has a water receiving tray, which is located at the lower part of the fins of the finned heat exchanger and extends along the arrangement direction of the fins;

[0066] The ends of the fins of the finned heat exchanger protrude into the water receiving tray;

[0067] The water receiving tray has a guard plate and a surrounding groove, and the guard plate and the surrounding groove surround the ends of the fins and form a closed cavity;

[0068] The frost formed on the fins forms water after defrosting and flows down the fins into the cavity formed by the water receiving tray;

[0069] The bottom of the water receiving tray has a slope and its drain pipe, the inlet of the drain pipe is located at or close to the lowest point of the slope, the defrosting water on the fins enters the ...

Embodiment 3

[0075] This embodiment discloses a method for preventing secondary freezing of the defrosting water of the heat pump unit, and the method includes the following steps:

[0076] S1: Make the fins of the finned heat exchanger of the heat pump unit extend in a direction perpendicular to the ground;

[0077] S2: providing a water receiving tray, so that the water receiving tray is located at the lower part of the fins and extends along the arrangement direction of the fins;

[0078] S3: making the ends of the fins of the finned heat exchanger extend into the water receiving tray;

[0079] S4: The water receiving tray has a guard plate and a surrounding groove, and the guard plate and the surrounding groove surround the ends of the fins and form a closed cavity; so that the frost formed on the fins is formed after defrosting Water flows down into the cavity formed by the water receiving tray along the fins;

[0080] S5: Let the bottom of the water receiving tray have an inclined ...

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