Capacity-control type double-cylinder rotary compressor and control method thereof

A rotary compressor, control technology, applied in the direction of compressors, compressors with reversible cycles, refrigerators, etc., can solve problems such as unsatisfactory actual results, and achieve the effect of high possibility, improving energy efficiency, and preventing efficiency reduction.

Active Publication Date: 2011-04-20
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the latter two capacity control technologies a

Method used

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  • Capacity-control type double-cylinder rotary compressor and control method thereof
  • Capacity-control type double-cylinder rotary compressor and control method thereof
  • Capacity-control type double-cylinder rotary compressor and control method thereof

Examples

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Example Embodiment

[0024] Example 1

[0025] See figure 1 , Shows a cycle diagram of the air conditioning system equipped with the two-cylinder rotary compressor 1 of the present invention, that is, the air conditioner during heating operation. The discharge pipe 3 welded to the upper end of the internal pressure of the hermetic housing 2 of the compressor 1 and the high pressure side corresponding to the discharge pressure is connected to the inlet of the indoor heat exchanger 5 via a four-way switching valve 4.

[0026] A gas-liquid separator 7 is arranged between the other end of the indoor heat exchanger 5, that is, the outlet, and the other end of the outdoor heat exchanger 6, that is, the inlet, and the gas-liquid separator 7 and the indoor heat exchanger 5 A first pressure reducing pipe 8a is connected between the other ends of the gas-liquid separator 7 and the other end of the outdoor heat exchanger 6 is connected with a second pressure reducing pipe 8b and a first check valve 18a. One end ...

Example Embodiment

[0064] Example 2

[0065] See Figure 5 If the control three-way valve 45 in the first embodiment is omitted, and if the second suction pipe 14b is directly connected between the four-way switching valve 4 and the outdoor heat exchanger 6, almost the same effect as the first embodiment can be obtained. In other words, under heating conditions, the aforementioned junction pressure is on the low-pressure side, so it is the second cylinder compression mode. After switching to the cooling condition, it becomes the second cylinder non-compression mode. Therefore, in Example 2, the heating capacity is maximized and the cooling capacity is reduced.

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Abstract

The invention discloses a capacity-control type double-cylinder rotary compressor and a control method thereof. The capacity-control type double-cylinder rotary compressor comprises a seal shell, wherein the internal pressure of the seal shell is a high-pressure side pressure, and a motor assembly and a compression assembly connected with the motor assembly are arranged in the shell; the compression assembly comprises a first cylinder, a second cylinder, an intermediate plate, a crankshaft, a first piston, a second piston, a first slip sheet, a second slip sheet, a first slip sheet cavity, a second slip sheet cavity, a main bearing and an auxiliary bearing, wherein the crankshaft is connected with the motor assembly; the first piston and the second piston are connected with the crankshaft to carry out eccentric rotation, and respectively arranged in a first cylinder compression chamber and a second cylinder compression chamber; the first slip sheet cavity and the second slip sheet cavity are respectively used for accommodating the back side end of the slip sheet; the main bearing and the auxiliary bearing are used for supporting the crankshaft; and the double-cylinder rotary compressor is provided with a gas refrigerant injection device which injects gas refrigerants into the second cylinder compression chamber and is also provided with a volume control device which switches the pressure of the second cylinder compression chamber between the high-pressure side pressure and the low-pressure side pressure. The capacity-control type double-cylinder rotary compressor has the advantages that the efficiency is improved effectively, and the EER (energy efficiency ratio) is high.

Description

technical field [0001] The invention relates to a double-cylinder rotary compressor, in particular to a capacity-controlled double-cylinder rotary compressor and a control method thereof. Background technique [0002] Heat pump air conditioners that combine cooling and heating have the fatal problem of insufficient heating capacity when the outdoor temperature is relatively low. However, in the conventional method of increasing the capacity of the compressor to increase the heating capacity, the efficiency of the air conditioner is often deteriorated, and the comfort of the air conditioner is often poor. [0003] The heating and air-conditioning capacity of the heat pump air conditioner with a large indoor-outdoor temperature difference needs to be at least 1.4 times the cooling and air-conditioning capacity. In recent years, methods of improving the heating and air conditioning capabilities of heat pump air conditioners have become widespread by installing rotary compresso...

Claims

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Application Information

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IPC IPC(8): F04C23/00F25B13/00
Inventor 小津政雄李华明
Owner GUANGDONG MEIZHI COMPRESSOR
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