CN110873486A - An absorption type solution defrosting system and air conditioner - Google Patents

Abstract

The invention provides an absorption type solution defrosting system, comprising an absorber, a solution pump, a generator and a solution condenser connected in sequence, wherein the generator is arranged in an indoor unit heat exchanger, and the solution condenser is arranged in an outdoor unit heat exchanger In the heater, the absorber is provided with an absorbing solution; the solution pump can pump the absorbing solution into the generator, and the generator can use the refrigerant of the indoor heat exchanger to drive the evaporating absorbing solution, and the vaporized gaseous The absorption solution can enter the solution condenser. After the above system is adopted, the present invention has the following advantages compared with the prior art: the circuit setting of the absorption type solution defrosting system of the present invention is simple, the absorption type solution is used to realize the defrosting of the outdoor unit heat exchanger, and the conventional The influence of the circulation system is small; on the other hand, the condensation heat of the indoor unit heat exchanger is used as the driving heat source, and the compressor does not need to be used to compress the refrigerant, so the power consumption is less, and the solution circulation is safer and more reliable.

Description

An absorption type solution defrosting system and air conditioner

technical field

The invention relates to the technical field of air conditioners, in particular to an absorption type solution defrosting system and an air conditioner.

Background technique

When the air conditioner operates in the heating mode under low temperature conditions in winter, frost often occurs on the coil of the condenser, and as the frost layer becomes thicker, the heating effect of the air conditioner will become worse and worse. Need to enter the defrost mode to run defrost.

During the defrosting operation of the air conditioner in the prior art, the common method is that the unit uses the four-way reversing valve to switch the heating mode to the cooling mode to defrost the outdoor unit. The disadvantages of this method are: on the one hand, the shutdown Defrost affects the heating capacity of the air conditioner; on the other hand, the four-way reversing valve switches frequently, which generates noise and affects its service life. Therefore, there is a non-stop defrosting method in the prior art, including a heating circuit and a double passage of a defrosting circuit, but in this method, the defrosting circuit also uses the condensing agent of the air conditioner itself, which requires an additional reversing valve Repeated switching will make the circuit setting and absorption solution defrosting system more complicated, and it is easy to affect the heating system of the air conditioning system itself.

SUMMARY OF THE INVENTION

The problem to be solved by the present invention is that the circuit setting and control of the dual-pass defrosting method in the prior art are complicated, and it is easy to affect the heating system of the air-conditioning system itself.

In order to solve the above problems, the first aspect of the present invention provides an absorption type solution defrosting system, including an absorber, a solution pump, a generator and a solution condenser connected in sequence, wherein the generator is arranged in the indoor unit heat exchanger. , the solution condenser is arranged in the outdoor heat exchanger, and the absorber is provided with an absorption solution; the solution pump can pump the absorption solution into the generator, and the generator The absorption type solution can be evaporated by the refrigerant drive of the indoor unit heat exchanger, and the evaporated gaseous absorption type solution can enter the solution condenser.

After the above system is adopted, the present invention has the following advantages compared with the prior art: the circuit setting of the absorption type solution defrosting system of the present invention is simple, the absorption type solution is used to realize the defrosting of the outdoor unit heat exchanger, and the conventional The influence of the circulation system is small; on the other hand, the condensation heat released by the refrigerant of the indoor unit heat exchanger is used as the driving heat source, and the compressor does not need to be used to compress the refrigerant.

Further, a liquid storage tank is arranged between the generator and the solution condenser; the liquid storage tank can be arranged to achieve sufficient gas-liquid separation of the evaporated absorption solution.

Further, the absorber is connected to the liquid storage tank, and the liquid absorption solution in the liquid storage tank can flow back into the absorber; with the above structure, the evaporated liquid absorption solution can be returned to the absorber. in the absorber.

Further, a first throttling device is arranged between the absorber and the solution condenser; the absorption solution condensed by the solution condenser can be returned to the absorber through the throttling device.

Further, the absorption solution defrosting system further includes an auxiliary driving heat source, which is arranged near the generator; the auxiliary driving heat source can provide driving heat when the condensation heat of the indoor unit heat exchanger cannot drive the evaporation of the absorption solution.

Further, the auxiliary driving heat source is an electric heating device; the selection of the electric heating device is low in cost and simple in control.

Further, the generator is arranged in parallel with the indoor unit heat exchanger, and the solution condenser is arranged in parallel with the outdoor unit heat exchanger; the above structure makes the absorption solution defrosting system relative to the air conditioning heating system. Independent, further reducing the impact on the conventional circulation system of the air conditioner.

Further, the absorption type solution includes a high-boiling point working fluid and a low-boiling point working fluid; using a mixed solution with a low boiling point and a high boiling point can improve the heat exchange efficiency, thereby improving the defrosting efficiency of the system.

Further, the absorption solution can be an ammonia solution, a lithium bromide solution or a calcium chloride-ammonia solution.

A second aspect of the present invention provides an air conditioner, comprising the above-mentioned absorption type solution defrosting system.

Description of drawings

Fig. 1 is the connection relation schematic diagram of each component in the absorption type solution defrosting system of the embodiment of the present invention and the air-conditioning conventional circulation system;

11-absorber; 12-solution pump; 13-generator; 14-liquid storage tank; 15-solution condenser; 16-first throttling device; 17-auxiliary drive heat source; 21-indoor unit heat exchanger; 22 - outdoor unit heat exchanger; 23 - second throttling device; 24 - compressor.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, it is a schematic diagram of the connection relationship between the absorption type solution defrosting system according to the embodiment of the present invention and the various components in the air conditioner conventional circulation system. The embodiment of the present invention discloses an absorption type solution defrosting system, which is arranged in the air conditioner. In the operating system of the air conditioner, the operating system of the air conditioner also includes a conventional air conditioning circulation system for the refrigeration and heating cycle of the air conditioner. 21. The second throttling device 23 and the outdoor unit heat exchanger 22.

In the above embodiment, the absorption type solution defrosting system includes an absorber 11, a solution pump 12, a generator 13 and a solution condenser 15 connected in sequence, wherein the generator 13 is arranged in the indoor unit for heat exchange. Therefore, the generator 13 can utilize the condensation heat of the indoor unit heat exchanger 21, and the condensation heat refers to the heat generated by the condensation heat dissipation of the indoor unit heat exchanger 21 under heating conditions; and The solution condenser 15 is disposed in the outdoor unit heat exchanger 22 . Therefore, the solution condenser 15 condenses and releases heat, which can achieve the effect of defrosting the outdoor unit heat exchanger 22 .

Preferably, the generator 13 is arranged in parallel with the indoor unit heat exchanger 21 , the solution condenser 15 is arranged in parallel with the outdoor unit heat exchanger 22 , and the above-mentioned structure makes the absorption solution defrosting system relatively The air-conditioning heating system is independent, reducing its impact on the conventional air-conditioning circulation system.

Further, the absorber 11 is provided with an absorption type solution, and the solution pump 12 can pump the absorption type solution into the generator 13, and the generator 13 can use the heat exchanger 21 of the indoor unit. The heat of condensation drives the evaporation of the absorption type solution, and the evaporated gaseous absorption type solution can enter the solution condenser 15 .

After adopting the above-structured system, the present invention has the following advantages compared with the prior art: the circuit setting of the absorption type solution defrosting system of the present invention is simple, the absorption type solution is used to realize the defrosting of the outdoor unit heat exchanger, the The influence of the circulation system is small; on the other hand, the condensation heat released by the refrigerant of the indoor unit heat exchanger is used as the driving heat source, and there is no need to use the compressor to compress the refrigerant, so the power consumption is less, and the solution circulation is safer and more reliable; There is no need to use the reversing valve frequently to change direction, so as to ensure the service life of the reversing valve and reduce noise to a certain extent.

Preferably, the absorption solution includes a high-boiling-point working medium and a low-boiling-point working medium. A liquid storage tank 14 is provided between the generator 13 and the solution condenser 15, and the absorber 11 is also connected to the liquid storage tank 14. At the same time, the absorber 11 is condensed with the solution A first throttling device 16 is also provided between the devices 15 .

Specifically, after the absorption type solution enters the generator 13, the generator 13 absorbs heat to evaporate the absorption type solution to form a gas-liquid mixture, and the gas-liquid mixture enters the liquid storage tank 14, and the The liquid storage tank 14 can realize sufficient gas-liquid separation of the evaporated absorption solution, wherein the high-temperature and high-pressure gas formed by the low-boiling-point working fluid enters the solution condenser 15, and the liquid absorption-type solution formed by the high-boiling-point working fluid is again. flows back into the absorber 11 .

Further, the high-temperature and high-pressure gas entering the solution condenser 15 is condensed into a liquid state by the solution condenser 15. In this process, heat can be released and the outdoor heat exchanger 22 can be defrosted, and the condensed absorption solution Then it returns to the absorber 13 through the first throttling device 16 to complete a complete defrosting cycle.

Above, adopt the absorption type solution that the high boiling point working fluid and the low boiling point working fluid mix, when the solution of the low boiling point working fluid condenses and enters the absorber 11, is absorbed by the solution of the high boiling point working fluid in the absorber 11 to realize exothermic, This part of the heat can reduce the condensation heat required to drive the evaporation of the absorption type solution in the generator 13, thereby improving the heat exchange efficiency, thereby improving the defrosting efficiency of the system.

Preferably, the absorption solution can be an ammonia solution, a lithium bromide solution or a calcium chloride-ammonia solution according to the specific use environment.

In addition, the absorption type solution defrosting system also includes an auxiliary driving heat source 17, which is arranged near the generator 13. The auxiliary driving heat source 17 can be provided when the condensation heat provided by the indoor unit heat exchanger 21 cannot drive the absorption type solution evaporation. Provides additional drive heat.

Specifically, the auxiliary driving heat source 17 is an electric heating device, and the selection of the electric heating device is low in cost and simple in control.

The present invention also provides an air conditioner, which includes the above-mentioned absorption type solution defrosting system. When the air conditioner operates in the heating mode or after running the heating mode for a certain period of time, the solution pump 12 is controlled to be turned on, so that the absorption type solution in the absorber 11 is activated. The solution enters the generator 13 to evaporate, and the evaporated high-temperature and high-pressure gas flows into the solution condenser 15 to condense and release heat, so as to realize the defrosting of the outdoor unit heat exchanger 22 . In the above process, the absorption solution defrosting system realizes non-stop defrosting, which improves the heating capacity of the air conditioner under defrosting conditions, thereby improving the user's comfort; It also has the advantages of less power consumption and safe and reliable solution circulation.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (10)

1. The absorption type solution defrosting system is characterized by comprising an absorber (11), a solution pump (12), a generator (13) and a solution condenser (15) which are sequentially connected, wherein the generator (13) is arranged in an indoor unit heat exchanger (21), the solution condenser (15) is arranged in an outdoor unit heat exchanger (22), and the absorber (11) is filled with absorption type solution; the solution pump (12) can pump the absorption solution into the generator (13), the generator (13) can drive the absorption solution to evaporate by using a refrigerant of an indoor unit heat exchanger (21), and the evaporated gaseous absorption solution can enter the solution condenser (15).

2. The absorption solution defrost system according to claim 2, wherein a liquid reservoir (14) is provided between the generator (13) and the solution condenser (15).

3. The absorption solution defrost system of claim 3 wherein said absorber (11) is connected to said reservoir (14) and liquid absorption solution in said reservoir (14) is returned to said absorber (11).

4. The absorption solution defrost system according to claim 1, characterized in that a first throttle device (16) is arranged between the absorber (11) and the solution condenser (15).

5. The absorption solution defrost system of claim 1 further comprising an auxiliary drive heat source (17) disposed adjacent the generator (13).

6. The absorption solution defrost system of claim 5 wherein the auxiliary drive heat source (17) is an electrical heating device.

7. The absorption solution defrost system of claim 1 wherein the generator (13) is arranged in parallel with the indoor heat exchanger (21) and the solution condenser (15) is arranged in parallel with the outdoor heat exchanger (22).

8. The absorption solution defrost system of claim 1 wherein the absorption solution includes a high boiling point working fluid and a low boiling point working fluid.

9. The absorption solution defrost system of claim 8 wherein the absorption solution may be an aqueous ammonia solution, an aqueous lithium bromide solution, or a calcium chloride-ammonia solution.

10. An air conditioner comprising the absorption solution defrost system of any one of claims 1-9.

Images