JPS58108363A - Engine driven type heat pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a heat pump used in air conditioners, water heaters, etc. , an expansion valve, an evaporator stk, and an iris engine-driven heat pump Ki configured to circulate the flow through the evaporator stk and the compressor taK.
I do it.

In this 110 engine-driven heat pump, an engine load detection device is conventionally installed in the transmission system from the engine to the compressor as a means to prevent stitching, which is caused by continuous operation of the engine under overload conditions. Based on the results,
Either a clutch is provided that is automatically and reversibly disconnected when the detected load increases beyond a set value, or
8M8 had a means of installing a device to stop the engine drive on its own when the engine load increased beyond the setting, but this pigeon house could prevent the engine from seizing, but it would reduce the load responsibility Wb. In severe cases - 1, the drive of the compressor is frequently stopped and the refrigeration operation is interrupted until at least the engine load returns to the set level 11I, resulting in the disadvantage that hot water cannot be supplied as expected during air conditioning.

The present invention completely prevents engine seizure caused by engine drive under overload conditions by rationally modifying the refrigerant piping system while continuing refrigeration operation. A pipe/paddle system which is capable of directing a portion of the refrigerant after the condensation through the engine cooling system and through the evaporator and compressor on the low pressure side. A valve is provided in the bypass passage, and the valve is opened automatically and reversibly when the detected load increases beyond a set value based on the detected result of the engine load detection device. When the engine load increases above the set value, the bypass passage valve is automatically opened based on this, and a part of the refrigerant that has passed through the condenser is passed through the engine cooling section to the low-pressure 1lIIO evaporator. By circulating the refrigerant between the refrigerant and the compressor, the latent heat generated when the refrigerant evaporates in the cooling section is used to cool the engine.

Therefore, engine seizure caused by O drive under overload conditions can be effectively prevented while continuing refrigeration operation and by utilizing the latent heat of vaporization of the refrigerant.

Hereinafter, embodiments of the present invention will be described based on the drawings.

The refrigeration unit of the engine-driven heat pump is configured by condensing the pressurized refrigerant from the compressor (3) interlocked with the engine (1) via the K clutch (2), the expansion valve 111, and the S evaporator 11+s+. Narahini said compression 41+s
It is configured to circulate the flow over +.

In this toto pump, the latent heat of cold condensation during heat exchange in the condenser (4) is used as a heating source for hot water supply in the heating section (9), or the evaporation (11) is used to generate O!
Refrigerant evaporation during lII replacement! Heat is used as a cooling source for air conditioning or freezing.

Thus, the evaporator (-) and compressor ts
The condensate 1 (
4) In addition to providing a throttling device + 81-equipped O bypass passage - for recirculating a part of the refrigerant after passing through the cooling water heat exchange II ff), which is an example of an engine cooling section, to the low pressure side refrigerant flow path section. In the cooling water circulation system of the engine (1), the engine load detection device @0-example detects the engine load fluctuation based on the temperature change of the cooling water.
A temperature switch It is provided which opens when the cooling water temperature does not rise above a set value due to an increase in engine load, and a solenoid valve provided in the bypass path is provided in the electrical circuit of this temperature switch. Through a control solenoid (18m) and an alarm controller 041, when the temperature switch 041 is closed, that is, when the engine load increases beyond the set value, the valve (l field) is automatically and reversibly activated. When it is opened, the alarm mode 04 is activated.

In the event of overload, the valve end is automatically opened and a part of the cold water after passing through the condenser (4) is transferred to the low pressure side evaporator @m and the compressor through the engine cooling water heat exchange II (T7). 11) is refluxed and used for heat exchange between the refrigerant and cooling water in the exchanger (1)! >, the refrigerant is heated and evaporated, and the cooling water is cooled using its IN latent heat.

The liquid heat exchanged with the engine cooling water in the cooling water heat exchange @ 17) may be discarded as is, but it may also be used as water for hot water supply or hot water for heating.

The diaphragm device (8) is composed of a cavity tube.

FIG. 8 shows another embodiment, in which a part of the refrigerant after passing through the condenser (4) is passed through a lubricating oil reservoir, which is an example of an engine cooling section, to the low pressure side OX output i1 (.) and the compressor. 11) In addition to providing an O bypass path with a swell device (1) that allows the flow to flow back to the 70111, a temperature switch is provided, which is an example of an engine load detection device, and detects engine load fluctuations by lubricating oil O temperature decay. (A pier is provided, and a solenoid (18 m long) for controlling the opening and opening of the solenoid valve 01 provided in the bypass path - and an alarm pad 4 are interposed in the electric circuit of the temperature switch atJ, so that the temperature switch ( When the valve I is closed and the engine load increases beyond the setting, the valve is automatically and reversibly opened and the alarm valve α4 is activated. be.

[Brief explanation of the drawing]

@ Figure 1 is a piping system diagram of the Nahito Bonp showing the actual F/140 embodiment, and Figure 3 is a piping system diagram showing the first embodiment. (1)... Engine, (1)... Compressor, 14)... Condensation Wjkz III...
...Expansion valve, (@l-...Evaporator, (1)...
...Cooling water heat exchange 1B, (lI...Bypass path, Fist...Engine load detection device, Participant...
...Valve, O@...Oil reservoir for lubricating oil. Agent Patent Attorney Osamu Kamura

Claims (1)

[Claims] ■ Condenses the pressurized refrigerant from the engine port) (on the compressor that can withstand the motion), the expansion valve rod 1, the iris @ (@) and the above pressure 4111 mj KI and the Soshi flow. In the engine-driven heat pump, previous II
! After condensation smIL port O refrigerant O part of the engine (1) 0*
*It's low pressure side 1 (-1 and pressure 11fl!
(4) Create a bypass path that allows the flow to return to the
Based on the test results, when the detected load increases beyond the set value, the engine-driven heat pump is equipped with a backbone that can be automatically and successfully removed. ■ The engine cooling section is a cooling water heat exchange ■ (n patent Il clothing O capital ■ No. Φl [Kle war O engine drive two and one pump. ■ The engine cooling section is a patent for lubricating oil warming trout. The engine driving rib and pump according to claim No. 1.0 The engine load detection device detects the engine cooling water temperature.
l [Described in any of the paragraphs ○ engine-driven heater]
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